WO2003090365A2 - A system and method for providing wireless telematics store and forward messaging for peer-to-peer and peer-to-peer-to-infrastructure in a communication network - Google Patents

A system and method for providing wireless telematics store and forward messaging for peer-to-peer and peer-to-peer-to-infrastructure in a communication network Download PDF

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Publication number
WO2003090365A2
WO2003090365A2 PCT/US2003/011365 US0311365W WO03090365A2 WO 2003090365 A2 WO2003090365 A2 WO 2003090365A2 US 0311365 W US0311365 W US 0311365W WO 03090365 A2 WO03090365 A2 WO 03090365A2
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WO
WIPO (PCT)
Prior art keywords
terminal
message
infrastructure equipment
vehicle
peer
Prior art date
Application number
PCT/US2003/011365
Other languages
French (fr)
Other versions
WO2003090365A3 (en
Inventor
Masood Garahi
William C. Elkington
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Meshnetworks, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meshnetworks, Inc. filed Critical Meshnetworks, Inc.
Priority to JP2003587017A priority Critical patent/JP2005528824A/en
Priority to EP03719727.4A priority patent/EP1573925B1/en
Priority to KR1020047016281A priority patent/KR100949151B1/en
Priority to CA2481441A priority patent/CA2481441C/en
Priority to AU2003223589A priority patent/AU2003223589A1/en
Publication of WO2003090365A2 publication Critical patent/WO2003090365A2/en
Publication of WO2003090365A3 publication Critical patent/WO2003090365A3/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • H04W88/04Terminal devices adapted for relaying to or from another terminal or user
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/123Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
    • G08G1/127Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams to a central station ; Indicators in a central station
    • G08G1/13Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams to a central station ; Indicators in a central station the indicator being in the form of a map
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/20Monitoring the location of vehicles belonging to a group, e.g. fleet of vehicles, countable or determined number of vehicles
    • G08G1/205Indicating the location of the monitored vehicles as destination, e.g. accidents, stolen, rental
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/50Connection management for emergency connections
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/18Self-organising networks, e.g. ad-hoc networks or sensor networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/58Message adaptation for wireless communication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/10Flow control between communication endpoints
    • H04W28/14Flow control between communication endpoints using intermediate storage
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/02Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/005Moving wireless networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/16Interfaces between hierarchically similar devices
    • H04W92/18Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to a system and method for wireless communication between mobile transceivers and wireless infrastructure elements through the use of intermediary mobile transceivers having store-and-forward message passing capabilities. Specifically, the present invention relates to a system and method for providing communication between mobile wireless transceivers and wireless infrastructure elements beyond the coverage of wireless infrastructure elements through the use of direct transceiver to transceiver communication.
  • each user terminal (hereinafter “mobile node”) is capable of operating as a base station or router for the other mobile nodes, thus eliminating the need for a fixed infrastructure of base stations. Accordingly, data packets being sent from a source mobile node to a destination mobile node are typically routed through a number of intermediate mobile nodes before reaching the destination mobile node. Details of an ad-hoc network are set forth in U.S. Patent No. 5,943,322 to Mayor, the entire content of which is incorporated herein by reference.
  • More sophisticated ad-hoc networks are also being developed which, in addition to enabling mobile nodes to communicate with each other as in a conventional ad-hoc network, further enable the mobile nodes to access a fixed network and thus communicate with other types of user terminals, such as those on the public switched telephone network (PSTN) and on other networks such as the Internet. Details of these types of ad-hoc networks are described in U.S. patent application Serial No. 09/897,790 entitled "Ad Hoc Peer-to-Peer Mobile Radio Access System Interfaced to the PSTN and Cellular Networks", filed on June 29, 2001, in U.S. patent application Serial No.
  • the subscriber may only communicate with another subscriber through the network's traditional infrastructure elements.
  • Cellular networks such as the Analog Mobile Phone System, Time Division Multiple Access (TDMA) or Code Division Multiple Access (CDMA) cellular systems, Personal Communication Systems (PCSs), or other cellular and data networks, such as Metricom's data network and the former Ardis network, only allow subscriber communication with another subscriber through the network's infrastructure.
  • Subscribers to the service provided by such mobile communication systems cannot communicate directly with one another using their subscriber radios or cellular telephones and therefore, need to be within range of an infrastructure element such as a base station or wired access point. Unfortunately therefore, the subscriber's ability to communicate is limited to geographical areas having such infrastructure equipment coverage.
  • LANs wireless local area networks
  • 802.11 wireless LANs have a peer-to-peer mode that enables subscriber equipment, such as Personal Computer Memory Card International Association standard (PCMCIA) card radios, to communicate directly with one another, without any infrastructure equipment, such as an access point.
  • PCMCIA Personal Computer Memory Card International Association standard
  • these communication systems are not designed to support mobile (i.e. vehicle based) users.
  • the radios of such systems are typically designed to provide high throughput in an office or campus environment with little processing gain or range. They typically are not capable of providing the Doppler offsets that are found in radios traveling at highway speeds.
  • An object of the present invention is to provide a system and method of peer- to-peer and peer-to-peer-to-infrastructure store-and-forward communication capabilities between communication subscribers in a communication network.
  • Another object of the present invention is to provide a system and method of peer-to-peer communication that is capable of providing appropriate Doppler offsets to enable peer-to-peer communications between highly mobile communication subscribers.
  • a further object of the present invention is to provide a protocol through which information communicated between mobile subscribers in peer-to-peer communication may be stored and later forwarded to a destination through wireless infrastructure elements when detected by the mobile subscriber that is storing the information.
  • Figure 1 A is a conceptual block diagram illustrating the initial relationship between vehicle host computers and a central facility in accordance with an embodiment of the present invention
  • Figure IB is a conceptual block diagram illustrating the subsequent relationship between vehicle host computers and a central facility in accordance with an embodiment of the present invention
  • Figure 2 is a block diagram illustrating an example of a user terminal employed in the network shown in Figures 1 A and IB;
  • Figure 3 is a table illustrating message types in use with the embodiment of the present invention shown in Figures 1A and IB;
  • Figure 4 is a flow chart illustrating an example of the functions executed by host computers within peer-to-peer and peer-to-peer-to-infrastructure communication as shown in Figures 1 A and IB.
  • An embodiment of the present invention provides for sending status and request-for-help messages automatically to an appropriate destination via a wireless infrastructure.
  • a host computer and transceiver will communicate the necessary information via a passing vehicle equipped with a like transceiver and host. That is, when the transceiver fails to locate wireless infrastructures, the host computer prepares for peer-to-peer communication, during which the necessary information is communicated to passing vehicles equipped with a like transceiver and host.
  • store-and-forward message passing protocol the vehicle status information and request for help would be stored in the transceiver of the passing vehicle, then transmitted from that vehicle through wireless infrastructure equipment to an appropriate destination, once such equipment is in range of this second vehicle.
  • FIGS 1A and IB are a conceptual block diagram illustrating the relationships between vehicle host computers and a central facility in a communication network 100 in accordance with an embodiment of the present invention.
  • first, second and third host computers 102, 103 and 104, respectively are shown as an example of mobile communication subscribers operating beyond the coverage area of traditional wireless infrastructure elements 110, such as a base station, an access point to a wireless network, or to a local area network (LAN) as described in U.S. patent application Serial Nos. 09/897,790, 09/815,157 and 09/815,164, the entire contents of each being incorporated herein by reference.
  • LAN local area network
  • Each host computer in this embodiment is located in a respective vehicle 111, 112 and 113, such as an automobile, and is configured to monitor conditions in and around the vehicle, such as date, time, mileage, vehicle identification number, geographic location, accident status, speed, fluid levels, and so on. Furthermore, each host computer 102, 103 or 104, depending upon application, may prepare a message regarding these monitored conditions or discretionary matters, for communication with any of several destinations as discussed in more detail below. [0021] Each host computer 102, 103 and 104 of Figures 1 A and IB can include, or be coupled to, a transceiver for sending and receiving messages to destinations that can send help, such as police or hospital in the case of accident messages, and a garage in the case of maintenance messages.
  • a transceiver for sending and receiving messages to destinations that can send help, such as police or hospital in the case of accident messages, and a garage in the case of maintenance messages.
  • each host computer 130 can be electrically coupled to a controller 126 of a transceiving unit 127.
  • the controller 126 in turn, is electrically coupled to a transceiver 124, which is coupled to an antenna 122 capable of receiving and transmitting signals such as packetized data signals via a modem.
  • the packetized data signals can include voice, data or multimedia.
  • the transceiver 124 is capable of transmitting the signals with the appropriate Doppler offsets that are found in signals transmitted by radios traveling at highway speeds as can be appreciated by one skilled in the art.
  • the controller 126 is further electrically coupled to a memory 128, such as a random access memory (RAM), that is capable of storing, among other things, routing information pertaining to itself and other devices in the network.
  • RAM random access memory
  • Each controller 126 also includes the appropriate hardware and software to perform Internet Protocol (IP) and Address Resolution Protocol (ARP), the purposes of which can be readily appreciated by one skilled in the art.
  • IP Internet Protocol
  • ARP Address Resolution Protocol
  • TCP transmission control protocol
  • UDP user datagram protocol
  • the controlled transceiver described above enables the status and request-for-help messages to be sent automatically to an appropriate destination via the wireless infrastructure equipment 110.
  • the vehicle's host computer and transceiver will communicate the necessary information via a passing vehicle equipped with a like transceiver and host.
  • the vehicle status information and request-for-help message would be stored in the transceiver of the passing vehicle until within range of infrastructure coverage, then transmitted from that vehicle through wireless infrastructure equipment to an appropriate destination.
  • each host computer 102, 103 and 104 includes a protocol allowing the storage of communicated messages, followed by transmission of stored messages from the receiving vehicle to wireless infrastructure equipment once such equipment coverage is detected. Therefore, as shown in Figure IB, as the mobile vehicle host computer 103 enters the coverage area bounded by 106, protocol directs the transmission of the stored message received from host computer 102, to a final destination via infrastructure equipment 110.
  • the receiving host computer 103 Prior to transmission, however, the receiving host computer 103 first determines utilization of infrastructure equipment 110 and will transmit the stored message received from host computer 102 only after a comparison of message type and equipment utilization.
  • Three message types are shown in Figure 3 as one example of message types used with an embodiment of the present invention.
  • each message would have a descending level of transmission priority, with distress messages having the highest level of priority, management messages having a somewhat less level of priority, and discretionary messages having the lowest level of priority.
  • Distress messages would be forwarded at the first access point to infrastructure equipment 110 (first intelligent access point IAP) identified by the vehicle host computer 103.
  • Management messages would be forwarded under certain conditions, for example, when the utilization of the infrastructure equipment 110 is below some predetermined percentage, likewise, discretionary messages would be forwarded when utilization is below some lower predetermined percentage. In doing so, capacity is protected for distress messages in areas with limited infrastructure equipment capacity.
  • a central facility such as a Mobile Internet Switching Controller (MISC), shown at 118 in Figures 1A and IB, would maintain a store-and-forward server that all "fire and forget" messages would be delivered to.
  • message examples may include, [0026] (1) distress messages, which are configured to include information such as geographical location and time information, [0027] (2) management messages, which may also be configured with geographical location and time information, in addition to quantitative values for maintenance/vehicle management purposes, and [0028] (3) discretionary communication information, which may be configured to include any information. [0029] Each resulting message, based upon it's content, will be directed to different destinations. Distress messages would be sent to the police or some comparable agency for immediate action.
  • MSC Mobile Internet Switching Controller
  • Management information would be sent to a destination identified by the vehicle owner and would be triggered by rules that the vehicle owner would specify. Triggers that might be employed include geographical, temporal, and vehicle speed. Discretionary message communication would be limited to relatively short messages in order to keep overhead within reason and may be limited to the Maximum Transmission Unit (MTU) size. The number sent by one transceiver would be limited over a period of time by the vehicle transceiver, and may also be configured in reply to the subscriber's management information base (MIB) from the MISC by Simple Network Management Protocol (SNMP) or some other similar protocol. [0030] In many instances, a number of identical messages must be sent to reasonably insure one reaches the final destination.
  • MIB subscriber's management information base
  • SNMP Simple Network Management Protocol
  • the host computer 102 in Figures 1A and IB calculates an optimum number of identical messages and sends one to each passing vehicle until this value is reached.
  • the total number of messages sent would be determined based on the capacity of the network in the area of a given Mobile Internet Switching Controller (MISC), optimized over time to achieve both a high probability of rapid delivery and a minimal impact on network overhead.
  • MISC Mobile Internet Switching Controller
  • This number would be configured within the host computer's management information base, and may be changed from the MISC through a protocol, such as Simple Network Management Protocol (SNMP).
  • SNMP Simple Network Management Protocol
  • FIG 4 is a flow chart of an embodiment of the present invention illustrating the functions executed by host computers within peer-to-peer and peer-to-peer-to- infrastructure communication.
  • steps 1-6 apply to a first vehicle which has prepared a message for communication but is unable to do so due to being beyond infrastructure coverage.
  • This first vehicle corresponds to the vehicle 111 described in Figures 1A and IB
  • the first host computer executing steps 1-6 corresponds to host computer 102 as described in Figures 1A and IB.
  • Steps 7-12 apply to a second vehicle receiving the prepared message in passing.
  • This second vehicle corresponds to vehicle 112 described in Figures 1A and IB and the second host computer executing steps 7-12 corresponds to host computer 103 as described in Figures 1 A and IB.
  • the first host computer may be configured to continuously monitor the vehicle and a variety of surrounding conditions, such as geographic location, vehicle accident status, vehicle speed, or miscellaneous vehicle fluid levels. Both first and second host computers contain protocol allowing the preparation, storage and transmission of various communication messages based on this monitored information, as well as discretionary messages as directed by the host computer.
  • the first host computer prepares a message based upon the monitored vehicle conditions or discretionary information and assigns a priority level. Based upon the created message, the first host computer determines a message destination in step 3, which can adequately address the monitored condition. Destinations may include police or medical assistance for priority accident messages, or maintenance facilities for vehicle condition messages.
  • step 4 the first host computer directs the search for the presence of wireless infrastructure coverage for direct message contact. If infrastructure coverage is detected, the message is sent via infrastructure in step 5 and the communication ends. If an absence of coverage is detected, the first host computer prepares for peer-to- peer, and subsequently, peer-to-peer-to-infrastructure communication. In step 6 the first host computer determines the number of identical prepared messages which must be sent to reasonably insure one reaches the final destination and thereafter, sends one prepared message to each passing vehicle containing like host computers until this value is reached.
  • the second host computer receives and stores the message sent by the first host computer. As the second host computer is directed to send the stored message upon detection of infrastructure coverage, the second host computer directs the search for the presence of wireless infrastructure coverage in step 8. If infrastructure coverage is not detected, the second host computer directs the continued search for coverage in step 9. If infrastructure coverage is detected, the second host computer determines the capacity of the infrastructure coverage and evaluates the priority of the stored message in step 10. As discussed above, distress messages would be forwarded at the first access point to infrastructure equipment. Management messages would be forwarded only when the utilization of the infrastructure equipment is below some predetermined percentage, and discretionary messages would be forwarded when utilization is below some lower predetermined percentage.
  • step 12 the second host computer will not send the message and return to step 8 and search for alternate infrastructure coverage. The second host computer will continuously search for infrastructure coverage with adequate capacity until the message is sent.
  • the context for use of the system and method is the situation in which a vehicle has reached an area that is outside the coverage of wireless infrastructure elements.
  • the vehicle may be disabled, for example, having run out of gas or having run into a tree, and a message containing this information and requests for assistance needs to be sent. Additional information concerning the geographic location of the disabled car may also be sent. This information can be derived through a GPS receiver in the vehicle or though some other means.
  • a host computer in the vehicle that monitors vehicle functions would then initiate a distress communication through a wireless transceiver in the vehicle in the manner described above.
  • a message would be created that contains information that a collision has occurred, that the vehicle is out of service, and assistance is required.
  • Another scenario in which an embodiment of the present invention may be used includes the tracking of a vehicle traveling outside an area served by wireless infrastructure equipment.
  • the host computer could be programmed to send out location information to a parent, police or car rental company.
  • the host computer may also be programmed to send out location information when certain predetermined events occur, such as the vehicle's stopping, starting or exceeding a particular speed or traveling beyond some predetermined boundary.
  • Another scenario in which an embodiment of the present invention may be used is to notify a remote agent of the need for certain maintenance, such as an oil change or tire rotation
  • Still another scenario in which an embodiment of the present invention may be used is to communicate non-automated information such as short text messages and small voice, graphics or video files to another person not within the general vicinity
  • Such messages may not be limited to vehicle status and may include any subject matter.

Abstract

A System and method (figure 4) for sending and receiving messages, such as status or request for help messages, automatically between mobile nodes and ultimately to an appropriate destination via wireless infrastructure. 'When a node determines that such infrastructure is not available, the node will communicate the necessary information to another mobile node located in, for instance, a vehicle. In this case, the receiving node stores the information, then transmit the information from that node to the wireless infrastructure equipment, so that the infrastructure can forward (he message to an appropriate destination once such equipment is in a range of this second node.

Description

A SYSTEM AND METHOD FOR PROVIDING WIRELESS TELEMATICS STORE AND FORWARD MESSAGING FOR PEER-TO-PEER AND PEER-TO- PEER-TO-INFRASTRUCTURE IN A COMMUNICATION NETWORK
BACKGROUND OF THE INVENTION
Field of the Invention:
[0001] The present invention relates to a system and method for wireless communication between mobile transceivers and wireless infrastructure elements through the use of intermediary mobile transceivers having store-and-forward message passing capabilities. Specifically, the present invention relates to a system and method for providing communication between mobile wireless transceivers and wireless infrastructure elements beyond the coverage of wireless infrastructure elements through the use of direct transceiver to transceiver communication.
Description of the Related Art:
[0002] In recent years, a type of mobile communications network known as an "ad- hoc" network has been developed for use by the military. In this type of network, each user terminal (hereinafter "mobile node") is capable of operating as a base station or router for the other mobile nodes, thus eliminating the need for a fixed infrastructure of base stations. Accordingly, data packets being sent from a source mobile node to a destination mobile node are typically routed through a number of intermediate mobile nodes before reaching the destination mobile node. Details of an ad-hoc network are set forth in U.S. Patent No. 5,943,322 to Mayor, the entire content of which is incorporated herein by reference.
[0003] More sophisticated ad-hoc networks are also being developed which, in addition to enabling mobile nodes to communicate with each other as in a conventional ad-hoc network, further enable the mobile nodes to access a fixed network and thus communicate with other types of user terminals, such as those on the public switched telephone network (PSTN) and on other networks such as the Internet. Details of these types of ad-hoc networks are described in U.S. patent application Serial No. 09/897,790 entitled "Ad Hoc Peer-to-Peer Mobile Radio Access System Interfaced to the PSTN and Cellular Networks", filed on June 29, 2001, in U.S. patent application Serial No. 09/815,157 entitled "Time Division Protocol for an Ad-Hoc, Peer-to-Peer Radio Network Having Coordinating Channel Access to Shared Parallel Data Channels with Separate Reservation Channel", filed on March 22, 2001, and in U.S. Patent Application Serial No. 09/815,164 entitled "Prioritized-Routing for an Ad-Hoc, Peer-to-Peer, Mobile Radio Access System", filed on March 22, 2001, the entire content of each said patent application being incorporated herein by reference.
[0004] However, in current wireless systems designed to support mobile subscribers, the subscriber may only communicate with another subscriber through the network's traditional infrastructure elements. Cellular networks, such as the Analog Mobile Phone System, Time Division Multiple Access (TDMA) or Code Division Multiple Access (CDMA) cellular systems, Personal Communication Systems (PCSs), or other cellular and data networks, such as Metricom's data network and the former Ardis network, only allow subscriber communication with another subscriber through the network's infrastructure. Subscribers to the service provided by such mobile communication systems cannot communicate directly with one another using their subscriber radios or cellular telephones and therefore, need to be within range of an infrastructure element such as a base station or wired access point. Unfortunately therefore, the subscriber's ability to communicate is limited to geographical areas having such infrastructure equipment coverage.
[0005] Other wireless communication systems, such as wireless local area networks (LANs) and, in particular, 802.11 wireless LANs, have a peer-to-peer mode that enables subscriber equipment, such as Personal Computer Memory Card International Association standard (PCMCIA) card radios, to communicate directly with one another, without any infrastructure equipment, such as an access point. However, these communication systems are not designed to support mobile (i.e. vehicle based) users. The radios of such systems are typically designed to provide high throughput in an office or campus environment with little processing gain or range. They typically are not capable of providing the Doppler offsets that are found in radios traveling at highway speeds. Furthermore, these communication systems have no provision for special protocol that can provide a "store-and-forward" message-passing capability that is initiated in peer-to-peer communication and completed when the second peer arrives within range of infrastructure elements. [0006] Moreover, in mobile wireless systems, there is no way to hand off messages without infrastructure elements. In wireless LAN systems, there is neither support for mobile subscribers, nor protocol that provides for the special classes of message that can be handled in a special manner.
[0007] Therefore, a need exists for a system and method of communication in which mobile subscribers may communicate directly with one another beyond infrastructure equipment coverage, and which includes protocol to provide store-and-forward message-passing capability that is initiated in peer-to-peer communication and completed when the storing peer arrives within infrastructure coverage to pass the stored information to the infrastructure.
SUMMARY OF THE INVENTION [0008] An object of the present invention is to provide a system and method of peer- to-peer and peer-to-peer-to-infrastructure store-and-forward communication capabilities between communication subscribers in a communication network. [0009] Another object of the present invention is to provide a system and method of peer-to-peer communication that is capable of providing appropriate Doppler offsets to enable peer-to-peer communications between highly mobile communication subscribers.
[0010] A further object of the present invention is to provide a protocol through which information communicated between mobile subscribers in peer-to-peer communication may be stored and later forwarded to a destination through wireless infrastructure elements when detected by the mobile subscriber that is storing the information.
[0011] These and other objects are substantially achieved by providing a system and method for sending and receiving status and request-for-help messages automatically between mobile host computers and transceivers and ultimately, to an appropriate destination via a wireless infrastructure. When wireless infrastructure coverage is not available, a host computer and transceiver will communicate the necessary information to a wireless infrastructure via a passing mobile host computer and transceiver located, for instance, in a vehicle. In this case, the message would be stored in the passing mobile host computer and transceiver until they are within range of infrastructure coverage, and then transmitted from that mobile host computer and transceiver through wireless infrastructure equipment to an appropriate destination.
BRIEF DESCRIPTION OF THE DRAWINGS [0012] These and other objects, features and characteristics of the present invention will become more apparent to those skilled in the art from a study of the following detailed description in conjunction with the appended claims and drawings, all of which form a part of this specification. In the drawings:
[0013] Figure 1 A is a conceptual block diagram illustrating the initial relationship between vehicle host computers and a central facility in accordance with an embodiment of the present invention;
[0014] Figure IB is a conceptual block diagram illustrating the subsequent relationship between vehicle host computers and a central facility in accordance with an embodiment of the present invention;
[0015] Figure 2 is a block diagram illustrating an example of a user terminal employed in the network shown in Figures 1 A and IB;
[0016] Figure 3 is a table illustrating message types in use with the embodiment of the present invention shown in Figures 1A and IB; and
[0017] Figure 4 is a flow chart illustrating an example of the functions executed by host computers within peer-to-peer and peer-to-peer-to-infrastructure communication as shown in Figures 1 A and IB.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0018] An embodiment of the present invention provides for sending status and request-for-help messages automatically to an appropriate destination via a wireless infrastructure. When such infrastructure is not available, as determined by the lack of the discovery of any infrastructure coverage, a host computer and transceiver will communicate the necessary information via a passing vehicle equipped with a like transceiver and host. That is, when the transceiver fails to locate wireless infrastructures, the host computer prepares for peer-to-peer communication, during which the necessary information is communicated to passing vehicles equipped with a like transceiver and host. Using store-and-forward message passing protocol, the vehicle status information and request for help would be stored in the transceiver of the passing vehicle, then transmitted from that vehicle through wireless infrastructure equipment to an appropriate destination, once such equipment is in range of this second vehicle.
[0019] Figures 1A and IB are a conceptual block diagram illustrating the relationships between vehicle host computers and a central facility in a communication network 100 in accordance with an embodiment of the present invention. In Figure 1A, first, second and third host computers 102, 103 and 104, respectively, are shown as an example of mobile communication subscribers operating beyond the coverage area of traditional wireless infrastructure elements 110, such as a base station, an access point to a wireless network, or to a local area network (LAN) as described in U.S. patent application Serial Nos. 09/897,790, 09/815,157 and 09/815,164, the entire contents of each being incorporated herein by reference.
[0020] Each host computer in this embodiment is located in a respective vehicle 111, 112 and 113, such as an automobile, and is configured to monitor conditions in and around the vehicle, such as date, time, mileage, vehicle identification number, geographic location, accident status, speed, fluid levels, and so on. Furthermore, each host computer 102, 103 or 104, depending upon application, may prepare a message regarding these monitored conditions or discretionary matters, for communication with any of several destinations as discussed in more detail below. [0021] Each host computer 102, 103 and 104 of Figures 1 A and IB can include, or be coupled to, a transceiver for sending and receiving messages to destinations that can send help, such as police or hospital in the case of accident messages, and a garage in the case of maintenance messages. As shown in Figure 2, each host computer 130 can be electrically coupled to a controller 126 of a transceiving unit 127. The controller 126 in turn, is electrically coupled to a transceiver 124, which is coupled to an antenna 122 capable of receiving and transmitting signals such as packetized data signals via a modem. The packetized data signals can include voice, data or multimedia. Furthermore, the transceiver 124 is capable of transmitting the signals with the appropriate Doppler offsets that are found in signals transmitted by radios traveling at highway speeds as can be appreciated by one skilled in the art. The controller 126 is further electrically coupled to a memory 128, such as a random access memory (RAM), that is capable of storing, among other things, routing information pertaining to itself and other devices in the network. Each controller 126 also includes the appropriate hardware and software to perform Internet Protocol (IP) and Address Resolution Protocol (ARP), the purposes of which can be readily appreciated by one skilled in the art. Optionally, the appropriate hardware and software to perform transmission control protocol (TCP) and user datagram protocol (UDP) may also be included.
[0022] In Figures 1A and IB, the controlled transceiver described above enables the status and request-for-help messages to be sent automatically to an appropriate destination via the wireless infrastructure equipment 110. When such infrastructure is not available, as determined by the vehicle's transceiver, the vehicle's host computer and transceiver will communicate the necessary information via a passing vehicle equipped with a like transceiver and host. In this case, using store-and-forward message passing protocol, the vehicle status information and request-for-help message would be stored in the transceiver of the passing vehicle until within range of infrastructure coverage, then transmitted from that vehicle through wireless infrastructure equipment to an appropriate destination.
[0023] In one embodiment of the present invention shown in Figure 1A, should vehicle host computer 102 require the communication of a prepared message regarding vehicle conditions, direct communication via wireless infrastructure equipment 110 is not possible, as host computer 102 is beyond the coverage area shown as bounded by 106. Therefore, the prepared message is communicated to vehicle host computer 103. Each host computer 102, 103 and 104 includes a protocol allowing the storage of communicated messages, followed by transmission of stored messages from the receiving vehicle to wireless infrastructure equipment once such equipment coverage is detected. Therefore, as shown in Figure IB, as the mobile vehicle host computer 103 enters the coverage area bounded by 106, protocol directs the transmission of the stored message received from host computer 102, to a final destination via infrastructure equipment 110.
[0024] Prior to transmission, however, the receiving host computer 103 first determines utilization of infrastructure equipment 110 and will transmit the stored message received from host computer 102 only after a comparison of message type and equipment utilization. Three message types are shown in Figure 3 as one example of message types used with an embodiment of the present invention. In Figure 3, each message would have a descending level of transmission priority, with distress messages having the highest level of priority, management messages having a somewhat less level of priority, and discretionary messages having the lowest level of priority. Distress messages would be forwarded at the first access point to infrastructure equipment 110 (first intelligent access point IAP) identified by the vehicle host computer 103. Management messages would be forwarded under certain conditions, for example, when the utilization of the infrastructure equipment 110 is below some predetermined percentage, likewise, discretionary messages would be forwarded when utilization is below some lower predetermined percentage. In doing so, capacity is protected for distress messages in areas with limited infrastructure equipment capacity.
[0025] A central facility, such as a Mobile Internet Switching Controller (MISC), shown at 118 in Figures 1A and IB, would maintain a store-and-forward server that all "fire and forget" messages would be delivered to. As shown in Figure 3, message examples may include, [0026] (1) distress messages, which are configured to include information such as geographical location and time information, [0027] (2) management messages, which may also be configured with geographical location and time information, in addition to quantitative values for maintenance/vehicle management purposes, and [0028] (3) discretionary communication information, which may be configured to include any information. [0029] Each resulting message, based upon it's content, will be directed to different destinations. Distress messages would be sent to the police or some comparable agency for immediate action. Management information would be sent to a destination identified by the vehicle owner and would be triggered by rules that the vehicle owner would specify. Triggers that might be employed include geographical, temporal, and vehicle speed. Discretionary message communication would be limited to relatively short messages in order to keep overhead within reason and may be limited to the Maximum Transmission Unit (MTU) size. The number sent by one transceiver would be limited over a period of time by the vehicle transceiver, and may also be configured in reply to the subscriber's management information base (MIB) from the MISC by Simple Network Management Protocol (SNMP) or some other similar protocol. [0030] In many instances, a number of identical messages must be sent to reasonably insure one reaches the final destination. Therefore the host computer 102 in Figures 1A and IB calculates an optimum number of identical messages and sends one to each passing vehicle until this value is reached. The total number of messages sent would be determined based on the capacity of the network in the area of a given Mobile Internet Switching Controller (MISC), optimized over time to achieve both a high probability of rapid delivery and a minimal impact on network overhead. This number would be configured within the host computer's management information base, and may be changed from the MISC through a protocol, such as Simple Network Management Protocol (SNMP).
[0031] Figure 4 is a flow chart of an embodiment of the present invention illustrating the functions executed by host computers within peer-to-peer and peer-to-peer-to- infrastructure communication. In the example outlined in Figure 4, steps 1-6 apply to a first vehicle which has prepared a message for communication but is unable to do so due to being beyond infrastructure coverage. This first vehicle corresponds to the vehicle 111 described in Figures 1A and IB, and the first host computer executing steps 1-6 corresponds to host computer 102 as described in Figures 1A and IB. Steps 7-12 apply to a second vehicle receiving the prepared message in passing. This second vehicle corresponds to vehicle 112 described in Figures 1A and IB and the second host computer executing steps 7-12 corresponds to host computer 103 as described in Figures 1 A and IB.
[0032] In step 1 , the first host computer may be configured to continuously monitor the vehicle and a variety of surrounding conditions, such as geographic location, vehicle accident status, vehicle speed, or miscellaneous vehicle fluid levels. Both first and second host computers contain protocol allowing the preparation, storage and transmission of various communication messages based on this monitored information, as well as discretionary messages as directed by the host computer. In step 2, the first host computer prepares a message based upon the monitored vehicle conditions or discretionary information and assigns a priority level. Based upon the created message, the first host computer determines a message destination in step 3, which can adequately address the monitored condition. Destinations may include police or medical assistance for priority accident messages, or maintenance facilities for vehicle condition messages. [0033] In step 4, the first host computer directs the search for the presence of wireless infrastructure coverage for direct message contact. If infrastructure coverage is detected, the message is sent via infrastructure in step 5 and the communication ends. If an absence of coverage is detected, the first host computer prepares for peer-to- peer, and subsequently, peer-to-peer-to-infrastructure communication. In step 6 the first host computer determines the number of identical prepared messages which must be sent to reasonably insure one reaches the final destination and thereafter, sends one prepared message to each passing vehicle containing like host computers until this value is reached.
[0034] In step 7, using store-and-forward message passing protocol, the second host computer receives and stores the message sent by the first host computer. As the second host computer is directed to send the stored message upon detection of infrastructure coverage, the second host computer directs the search for the presence of wireless infrastructure coverage in step 8. If infrastructure coverage is not detected, the second host computer directs the continued search for coverage in step 9. If infrastructure coverage is detected, the second host computer determines the capacity of the infrastructure coverage and evaluates the priority of the stored message in step 10. As discussed above, distress messages would be forwarded at the first access point to infrastructure equipment. Management messages would be forwarded only when the utilization of the infrastructure equipment is below some predetermined percentage, and discretionary messages would be forwarded when utilization is below some lower predetermined percentage.
[0035] If the second host computer determines infrastructure coverage capacity is sufficient, the stored message is sent and the communication ends. If the coverage capacity is not sufficient, in step 12 the second host computer will not send the message and return to step 8 and search for alternate infrastructure coverage. The second host computer will continuously search for infrastructure coverage with adequate capacity until the message is sent.
[0036] The context for use of the system and method is the situation in which a vehicle has reached an area that is outside the coverage of wireless infrastructure elements. The vehicle may be disabled, for example, having run out of gas or having run into a tree, and a message containing this information and requests for assistance needs to be sent. Additional information concerning the geographic location of the disabled car may also be sent. This information can be derived through a GPS receiver in the vehicle or though some other means.
[0037] Following the disabling event, a host computer in the vehicle that monitors vehicle functions would then initiate a distress communication through a wireless transceiver in the vehicle in the manner described above. A message would be created that contains information that a collision has occurred, that the vehicle is out of service, and assistance is required.
[0038] Another scenario in which an embodiment of the present invention may be used includes the tracking of a vehicle traveling outside an area served by wireless infrastructure equipment. At predetermined intervals, the host computer could be programmed to send out location information to a parent, police or car rental company. The host computer may also be programmed to send out location information when certain predetermined events occur, such as the vehicle's stopping, starting or exceeding a particular speed or traveling beyond some predetermined boundary.
[0039] Another scenario in which an embodiment of the present invention may be used is to notify a remote agent of the need for certain maintenance, such as an oil change or tire rotation
[0040] Still another scenario in which an embodiment of the present invention may be used is to communicate non-automated information such as short text messages and small voice, graphics or video files to another person not within the general vicinity
(or multi-hop wireless range) of the sending vehicle. Such messages may not be limited to vehicle status and may include any subject matter.
[0041] Although only a few exemplary embodiments of the present invention have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention. Accordingly, all such modifications are intended to be included within the scope of this invention as defined in the following claims.

Claims

What is claimed is:
1. A method for enabling a terminal at a location outside a coverage area of infrastructure equipment to communicate with said infrastructure equipment, comprising: monitoring at least one condition of a first vehicle at which a first terminal is disposed; preparing a message based on said monitored vehicle condition; controlling said first terminal to send said message to another vehicle when a lack of infrastructure equipment coverage is detected; storing said message in a second terminal disposed on said second vehicle; and sending said message from said second terminal to said infrastructure equipment when said second terminal detects a presence of said infrastructure equipment coverage.
2. A method as claimed in Claim 1, wherein said monitored condition comprises at least one of the following relative to said first vehicle: geographic location, accident status, speed, fluid levels and discretionary message inputs.
3. A method as claimed in Claim 1, wherein said prepared message comprises information pertaining to said monitored condition.
4. A method as claimed in Claim 1, wherein said first terminal is adapted to determine a destination for said prepared message based on said monitored vehicle conditions.
5. A method as claimed in Claim 1, wherein said first terminal is adapted to determine a cumulative number of said prepared messages to send.
6. A method as claimed in Claim 1, wherein said first terminal is adapted to assign said message one of a plurality of priority levels.
7. A method as claimed in Claim 1, wherein said first terminal is adapted to detect infrastructure equipment coverage.
8. A method as claimed in Claim 1, wherein said first terminal is adapted to send said message with Doppler effect offsets.
9. A method as claimed in Claim 1, wherein said second terminal is adapted to receive and store said message using store-and-forward protocols.
10. A method as claimed in Claim 1, wherein said second terminal is adapted to detect infrastructure equipment coverage.
11. A method as claimed in Claim 1, wherein said second terminal is adapted to determine whether utilization levels of said infrastructure equipment coverage will allow sending messages of a particular one of a plurality of priority levels.
12. A system of wireless communications between infrastructure equipment and a terminal at a location outside a coverage area of said infrastructure equipment, comprising: a first terminal, adapted to monitor at least one condition of a first vehicle at which said first terminal is disposed, and to send a message based on said monitored condition to another vehicle when a lack of infrastructure equipment coverage is detected by said first terminal; and a second terminal, disposed at a second vehicle, and adapted to receive and store said message, and further adapted to send said message from said second terminal to said infrastructure equipment when said second terminal detects a presence of said infrastructure equipment.
13. A system as claimed in Claim 12, wherein said first terminal comprises: a first transceiver, adapted to transmit said message; and a first host computer, adapted to monitor said condition and to provide said message to said transceiver.
14. A system as claimed in Claim 12, wherein said monitored condition comprises at least one of the following relative to said first vehicle: geographic location, accident status, speed, fluid levels and discretionary message inputs.
15. A system as claimed in Claim 12, wherein said prepared message comprises information pertaining to said monitored condition.
16. A system as claimed in Claim 12, wherein said first terminal is further adapted to determine a destination for said prepared message based on said monitored vehicle conditions.
17. A system as claimed in Claim 12, wherein said first terminal is further adapted to determine a cumulative number of said prepared message to send.
18. A system as claimed in Claim 12, wherein said first terminal is further adapted to assign said message one of a plurality of priority levels.
19. A system as claimed in Claim 12, wherein said first terminal is further adapted to detect infrastructure equipment coverage.
20. A system as claimed in Claim 12, wherein said first terminal is further adapted to send said message with Doppler effect offsets.
21. A system as claimed in Claim 12, wherein said second terminal comprises: a transceiver, adapted to receive said message; a memory, adapted to store said message; and a controller, adapted to control said transceiver to retransmit said message to said infrastructure equipment upon detection of said infrastructure equipment.
22. A system as claimed in Claim 12, wherein said second terminal is further adapted to receive and store said message using store-and-forward protocols.
23. A system as claimed in Claim 12, wherein said second terminal is further adapted to detect infrastructure equipment coverage.
24. A system as claimed in Claim 12, wherein said second terminal is further adapted to determine whether utilization levels of said infrastructure equipment coverage will allow sending messages of a certain priority level.
25. A terminal for wireless communication at a location outside a coverage area of infrastructure equipment, comprising: a transceiver; and a controller, adapted to monitor at least one condition of a vehicle at which said terminal is disposed, and to control said transceiver to send a message including information pertaining to said monitored condition to another vehicle when said controller detects a lack of presence of said infrastructure equipment.
26. A terminal as claimed in Claim 25, wherein: said transceiver is further adapted to receive and store another message from another terminal; and said controller is further adapted to control said transceiver to send said stored message to said infrastructure equipment when said controller detects a presence of said infrastructure equipment.
PCT/US2003/011365 2002-04-16 2003-04-14 A system and method for providing wireless telematics store and forward messaging for peer-to-peer and peer-to-peer-to-infrastructure in a communication network WO2003090365A2 (en)

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EP03719727.4A EP1573925B1 (en) 2002-04-16 2003-04-14 A system and method for providing wireless telematics store and forward messaging for peer-to-peer and peer-to-peer-to-infrastructure in a communication network
KR1020047016281A KR100949151B1 (en) 2002-04-16 2003-04-14 A system and method for providing wireless telematics store and forward messaging for peer-to-peer and peer-to-peer-to-infrastructure in a communication network
CA2481441A CA2481441C (en) 2002-04-16 2003-04-14 A system and method for providing wireless telematics store and forward messaging for peer-to-peer and peer-to-peer-to-infrastructure in a communication network
AU2003223589A AU2003223589A1 (en) 2002-04-16 2003-04-14 A system and method for providing wireless telematics store and forward messaging for peer-to-peer and peer-to-peer-to-infrastructure in a communication network

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006097177A1 (en) 2005-03-16 2006-09-21 Eastman Kodak Company Method and equipment for data transmission by ad-hoc network
WO2010125321A1 (en) * 2009-04-30 2010-11-04 Alstom Transport Sa Method for transferring alarm data between a broken-down railway vehicle and a control centre and associated device
DE102014214152A1 (en) * 2014-07-21 2016-01-21 Siemens Aktiengesellschaft A system for data exchange over long distances using near field communication links between mobile terminals

Families Citing this family (88)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7302704B1 (en) * 2000-06-16 2007-11-27 Bbn Technologies Corp Excising compromised routers from an ad-hoc network
JP4187500B2 (en) * 2002-10-25 2008-11-26 アルパイン株式会社 Message processing apparatus and system
WO2004052031A1 (en) * 2002-11-27 2004-06-17 U-Nav Microelectronics Corporation System and method of utilizing positioning receiver hardware for network-based transceiver applications
US20040171347A1 (en) * 2003-02-28 2004-09-02 Burton Joshua W. Method and system for sending signals over a network with mobile nodes
JP4068494B2 (en) * 2003-04-08 2008-03-26 アルパイン株式会社 Communication data relay method and inter-vehicle communication system
KR100498965B1 (en) * 2003-04-22 2005-07-01 삼성전자주식회사 A System and Method For Communicating Vehicle Driving Information Using Ad Hoc Network
US20040264475A1 (en) * 2003-06-30 2004-12-30 The Nature Of The Conveyance Class of high throughput MAC architectures for multi-channel CSMA systems
US6959265B1 (en) * 2003-10-07 2005-10-25 Serden Technologies, Inc. User-centric measurement of quality of service in a computer network
US20070274232A1 (en) * 2004-04-05 2007-11-29 Telefonaktiebolaget Lm Ericsson (Pub) Method, Communication Device and System for Detecting Neighboring Nodes in a Wireless Multihop Network Using Ndp
EP1733528A1 (en) * 2004-04-05 2006-12-20 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Method, communication device and system for address resolution mapping in a wireless multihop ad hoc network.
US7428588B2 (en) * 2004-04-08 2008-09-23 International Business Machines Corporation Method for distributing and geographically load balancing location aware communication device client-proxy applications
US8057307B2 (en) * 2004-04-08 2011-11-15 International Business Machines Corporation Handling of players and objects in massive multi-player on-line games
EP1587258A3 (en) * 2004-04-16 2010-04-21 Intracom S.A. Defense Electronic Systems Wideband intercom and secure pocket radio (WISPR)
JP2006094369A (en) * 2004-09-27 2006-04-06 Nec Corp Automatic message notification system and its method, communication terminal equipment and its program
US7668146B2 (en) 2004-12-20 2010-02-23 Connectivities Llc Internet-oriented ad-hoc network
US20060276200A1 (en) * 2005-05-17 2006-12-07 Sridhar Radhakrishnan Mobile and wireless network architecture for law enforcement
US7717342B2 (en) 2005-08-26 2010-05-18 Hand Held Products, Inc. Data collection device having dynamic access to multiple wireless networks
US8694435B1 (en) * 2005-11-14 2014-04-08 American Express Travel Related Services Company, Inc. System and method for linking point of sale devices within a virtual network
US8811369B2 (en) 2006-01-11 2014-08-19 Qualcomm Incorporated Methods and apparatus for supporting multiple communications modes of operation
ATE499812T1 (en) 2006-01-11 2011-03-15 Qualcomm Inc DISCOVERY OF WIRELESS DEVICES IN A WIRELESS PEER-TO-PEER NETWORK
US20070217372A1 (en) * 2006-03-14 2007-09-20 Gorday Paul E System and method for distributing data in dedicated short-range communication system
US9288637B2 (en) * 2006-05-16 2016-03-15 Lear Corporation Mobile router network with valet mode function
US7808960B1 (en) 2006-05-25 2010-10-05 The Hong Kong University Of Science And Technology Wireless infrastructure and ad hoc network integration
DE102006028909A1 (en) * 2006-06-21 2007-12-27 Claas Selbstfahrende Erntemaschinen Gmbh Communication network has multiple nodes equipped with transceiver units for conduction-free communication and memory assigned to each node for operating-parameter-profiles of multiple mobile machines
US8769145B2 (en) * 2006-07-03 2014-07-01 Palo Alto Research Center Incorporated Specifying predicted utility of information in a network
US8171105B2 (en) * 2006-07-03 2012-05-01 Palo Alto Research Center Incorporated Modification of information utility based upon context
US8325718B2 (en) * 2006-07-03 2012-12-04 Palo Alto Research Center Incorporated Derivation of a propagation specification from a predicted utility of information in a network
US7835351B2 (en) * 2006-07-03 2010-11-16 Palo Alto Research Center Incorporated Selection of information for transmission and storage in an ad-hoc network based upon local synopsis exchange
US7966419B2 (en) * 2006-07-03 2011-06-21 Palo Alto Research Center Incorporated Congestion management in an ad-hoc network based upon a predicted information utility
US7751390B2 (en) * 2006-07-03 2010-07-06 Palo Alto Research Center Incorporated Selection of transmission media in an ad-hoc network based upon approximate predicted information utility
US20080002722A1 (en) * 2006-07-03 2008-01-03 Palo Alto Research Center Incorporated Providing a propagation specification for information in a network
US7720060B2 (en) * 2006-07-03 2010-05-18 Palo Alto Research Center Incorporated Information dissemination system having an information layer
US8971346B2 (en) * 2007-04-30 2015-03-03 Hand Held Products, Inc. System and method for reliable store-and-forward data handling by encoded information reading terminals
US8638806B2 (en) 2007-05-25 2014-01-28 Hand Held Products, Inc. Wireless mesh point portable data terminal
US7874483B2 (en) * 2007-11-14 2011-01-25 Hand Held Products, Inc. Encoded information reading terminal with wireless path selection capability
US8127235B2 (en) 2007-11-30 2012-02-28 International Business Machines Corporation Automatic increasing of capacity of a virtual space in a virtual world
US20090164919A1 (en) 2007-12-24 2009-06-25 Cary Lee Bates Generating data for managing encounters in a virtual world environment
FR2927213A1 (en) * 2008-02-01 2009-08-07 Alcatel Lucent Sas METHOD FOR MANAGING THE ACCESS OF A USER EQUIPMENT TO A RADIO COMMUNICATION NETWORK INFRASTRUCTURE, INFRASTRUCTURE ACCESS POINT, AND USER EQUIPMENT, FOR THE IMPLEMENTATION OF THE METHOD.
WO2009113919A1 (en) * 2008-03-14 2009-09-17 Volvo Techology Corporation System and method for providing a stable and tamper proof communication between a vehicle, a vehicle related unit, and a remote system
US8595501B2 (en) 2008-05-09 2013-11-26 Qualcomm Incorporated Network helper for authentication between a token and verifiers
US8191785B2 (en) 2009-03-05 2012-06-05 Hand Held Products, Inc. Encoded information reading terminal operating in infrastructure mode and ad-hoc mode
US20100257477A1 (en) * 2009-04-03 2010-10-07 Certusview Technologies, Llc Methods, apparatus, and systems for documenting and reporting events via geo-referenced electronic drawings
US8320954B2 (en) 2009-07-31 2012-11-27 Research In Motion Limited System and method for enabling messages to be sent while a mobile device is out-of-coverage
ATE548882T1 (en) 2009-07-31 2012-03-15 Research In Motion Ltd SYSTEM AND METHOD FOR ALLOWING MESSAGES TO BE SENT FROM A MOBILE DEVICE WITHOUT RECEIPT
US8321870B2 (en) * 2009-08-14 2012-11-27 General Electric Company Method and system for distributed computation having sub-task processing and sub-solution redistribution
US8670897B1 (en) 2009-12-02 2014-03-11 Feeney Wireless, LLC Mobile in-vehicle communication and routing apparatus, system, and method
US9205328B2 (en) 2010-02-18 2015-12-08 Activision Publishing, Inc. Videogame system and method that enables characters to earn virtual fans by completing secondary objectives
US9682324B2 (en) 2010-05-12 2017-06-20 Activision Publishing, Inc. System and method for enabling players to participate in asynchronous, competitive challenges
TW201218808A (en) * 2010-10-18 2012-05-01 Gemtek Technology Co Ltd Wireless communication device
EP2466926B1 (en) * 2010-12-20 2015-03-11 BlackBerry Limited Message relay host for delivering messages to out of coverage communication devices
US8521135B2 (en) 2010-12-20 2013-08-27 Research In Motion Limited Message relay host for delivering messages to out of coverage communications devices
US9106623B2 (en) 2011-05-04 2015-08-11 Qualcomm Incorporated Method and apparatus for transmitting bulk emergency data while preserving user privacy
US8538372B2 (en) 2011-05-05 2013-09-17 Honda Motor Co., Ltd. Universal messaging
US20140364079A1 (en) * 2011-12-08 2014-12-11 Interdigital Patent Holdings, Inc. METHOD AND APPARATUS FOR ADVANCED TOPOLOGY (AT) POLICY MANAGEMENT FOR DIRECT COMMUNICATION BETWEEN WIRELESS TRANSMIT/RECEIVE UNITS (WTRUs)
US8442758B1 (en) 2012-02-27 2013-05-14 Toyota Motor Engineering & Manufacturing North America, Inc. Systems and methods for a vehicle smart calendar
US8594861B2 (en) 2012-02-27 2013-11-26 Toyota Motor Engineering & Manufacturing North America, Inc. Systems and methods for communicating with a vehicle user
US8532921B1 (en) 2012-02-27 2013-09-10 Toyota Motor Engineering & Manufacturing North America, Inc. Systems and methods for determining available providers
US20130344842A1 (en) * 2012-06-22 2013-12-26 Qual Comm Incorporated Mobile synchronization to aid in emergency situations
US10137376B2 (en) 2012-12-31 2018-11-27 Activision Publishing, Inc. System and method for creating and streaming augmented game sessions
GB2524980A (en) * 2014-04-07 2015-10-14 Bae Systems Plc Ad hoc network
EP3130194B1 (en) 2014-04-07 2019-06-05 BAE Systems PLC Ad hoc network with unidirectional link
US10322351B2 (en) 2014-07-03 2019-06-18 Activision Publishing, Inc. Matchmaking system and method for multiplayer video games
KR101617543B1 (en) * 2014-10-06 2016-05-02 주식회사 만도 Detecting system for vehicle emergency
US11351466B2 (en) 2014-12-05 2022-06-07 Activision Publishing, Ing. System and method for customizing a replay of one or more game events in a video game
US20170346891A1 (en) * 2014-12-15 2017-11-30 Nec Corporation Communication method
US10118099B2 (en) 2014-12-16 2018-11-06 Activision Publishing, Inc. System and method for transparently styling non-player characters in a multiplayer video game
US10315113B2 (en) 2015-05-14 2019-06-11 Activision Publishing, Inc. System and method for simulating gameplay of nonplayer characters distributed across networked end user devices
US10471348B2 (en) 2015-07-24 2019-11-12 Activision Publishing, Inc. System and method for creating and sharing customized video game weapon configurations in multiplayer video games via one or more social networks
EP3151516A1 (en) 2015-09-29 2017-04-05 Robert Bosch Gmbh Method for inter vehicle communication and a system thereof
US10099140B2 (en) 2015-10-08 2018-10-16 Activision Publishing, Inc. System and method for generating personalized messaging campaigns for video game players
US11185784B2 (en) 2015-10-08 2021-11-30 Activision Publishing, Inc. System and method for generating personalized messaging campaigns for video game players
US10376781B2 (en) 2015-10-21 2019-08-13 Activision Publishing, Inc. System and method of generating and distributing video game streams
US10245509B2 (en) 2015-10-21 2019-04-02 Activision Publishing, Inc. System and method of inferring user interest in different aspects of video game streams
US10232272B2 (en) 2015-10-21 2019-03-19 Activision Publishing, Inc. System and method for replaying video game streams
US10226703B2 (en) 2016-04-01 2019-03-12 Activision Publishing, Inc. System and method of generating and providing interactive annotation items based on triggering events in a video game
MX2019005332A (en) 2016-11-07 2019-08-21 Whelen Eng Network and connected devices for emergency response and roadside operations.
US10500498B2 (en) 2016-11-29 2019-12-10 Activision Publishing, Inc. System and method for optimizing virtual games
US20180268622A1 (en) * 2017-03-17 2018-09-20 Ford Global Technologies, Llc Distributed vehicle data storage and access
US10636309B2 (en) 2017-09-08 2020-04-28 Ford Global Technologies, Llc Vehicle communication management systems and methods
US10561945B2 (en) 2017-09-27 2020-02-18 Activision Publishing, Inc. Methods and systems for incentivizing team cooperation in multiplayer gaming environments
US11040286B2 (en) 2017-09-27 2021-06-22 Activision Publishing, Inc. Methods and systems for improved content generation in multiplayer gaming environments
US10974150B2 (en) 2017-09-27 2021-04-13 Activision Publishing, Inc. Methods and systems for improved content customization in multiplayer gaming environments
US10765948B2 (en) 2017-12-22 2020-09-08 Activision Publishing, Inc. Video game content aggregation, normalization, and publication systems and methods
US11679330B2 (en) 2018-12-18 2023-06-20 Activision Publishing, Inc. Systems and methods for generating improved non-player characters
US11097193B2 (en) 2019-09-11 2021-08-24 Activision Publishing, Inc. Methods and systems for increasing player engagement in multiplayer gaming environments
US11712627B2 (en) 2019-11-08 2023-08-01 Activision Publishing, Inc. System and method for providing conditional access to virtual gaming items
US11524234B2 (en) 2020-08-18 2022-12-13 Activision Publishing, Inc. Multiplayer video games with virtual characters having dynamically modified fields of view
US11351459B2 (en) 2020-08-18 2022-06-07 Activision Publishing, Inc. Multiplayer video games with virtual characters having dynamically generated attribute profiles unconstrained by predefined discrete values

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3839959A1 (en) 1988-10-06 1990-04-12 Bosch Gmbh Robert EMERGENCY CALL DEVICE FOR A VEHICLE
US5943322A (en) 1996-04-24 1999-08-24 Itt Defense, Inc. Communications method for a code division multiple access system without a base station
WO2002011346A2 (en) 2000-07-31 2002-02-07 Motorola Inc. Method and apparatus for transferring data
US6807165B2 (en) 2000-11-08 2004-10-19 Meshnetworks, Inc. Time division protocol for an ad-hoc, peer-to-peer radio network having coordinating channel access to shared parallel data channels with separate reservation channel
US6873839B2 (en) 2000-11-13 2005-03-29 Meshnetworks, Inc. Prioritized-routing for an ad-hoc, peer-to-peer, mobile radio access system
US7072650B2 (en) 2000-11-13 2006-07-04 Meshnetworks, Inc. Ad hoc peer-to-peer mobile radio access system interfaced to the PSTN and cellular networks

Family Cites Families (119)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839717A (en) * 1972-01-28 1974-10-01 Identification Co Inc Communication apparatus for communicating between a first and a second object
US4910521A (en) 1981-08-03 1990-03-20 Texas Instruments Incorporated Dual band communication receiver
US4494192A (en) 1982-07-21 1985-01-15 Sperry Corporation High speed bus architecture
JPS59115633A (en) 1982-12-22 1984-07-04 Toshiba Corp Information transmitting system
US4675863A (en) 1985-03-20 1987-06-23 International Mobile Machines Corp. Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
US4747130A (en) 1985-12-17 1988-05-24 American Telephone And Telegraph Company, At&T Bell Laboratories Resource allocation in distributed control systems
US4736371A (en) 1985-12-30 1988-04-05 Nec Corporation Satellite communications system with random multiple access and time slot reservation
US4742357A (en) 1986-09-17 1988-05-03 Rackley Ernie C Stolen object location system
US4873711A (en) * 1986-10-10 1989-10-10 Motorola, Inc. Method and apparatus for remote talk/listen communication system
GB2229064B (en) 1987-06-11 1990-12-12 Software Sciences Limited An area communications system
US5210846B1 (en) 1989-05-15 1999-06-29 Dallas Semiconductor One-wire bus architecture
US5555425A (en) 1990-03-07 1996-09-10 Dell Usa, L.P. Multi-master bus arbitration system in which the address and data lines of the bus may be separately granted to individual masters
US5068916A (en) 1990-10-29 1991-11-26 International Business Machines Corporation Coordination of wireless medium among a plurality of base stations
JP2692418B2 (en) 1991-05-17 1997-12-17 日本電気株式会社 Radio channel allocation method
US5241542A (en) 1991-08-23 1993-08-31 International Business Machines Corporation Battery efficient operation of scheduled access protocol
US5369748A (en) 1991-08-23 1994-11-29 Nexgen Microsystems Bus arbitration in a dual-bus architecture where one bus has relatively high latency
FR2683326B1 (en) 1991-10-31 1993-12-24 Thomson Applic Radars Centre METHOD FOR QUERYING A RADAR ANSWERING MACHINE AND AN ANSWERING MACHINE FOR IMPLEMENTING THE METHOD.
US5231634B1 (en) 1991-12-18 1996-04-02 Proxim Inc Medium access protocol for wireless lans
US5392450A (en) 1992-01-08 1995-02-21 General Electric Company Satellite communications system
US5896561A (en) 1992-04-06 1999-04-20 Intermec Ip Corp. Communication network having a dormant polling protocol
FR2690252B1 (en) 1992-04-17 1994-05-27 Thomson Csf METHOD AND SYSTEM FOR DETERMINING THE POSITION AND ORIENTATION OF A MOBILE, AND APPLICATIONS.
US5233604A (en) 1992-04-28 1993-08-03 International Business Machines Corporation Methods and apparatus for optimum path selection in packet transmission networks
JP3233995B2 (en) * 1992-07-10 2001-12-04 マツダ株式会社 Vehicle reporting system and device
EP0590588B2 (en) * 1992-09-30 2003-09-10 Hitachi, Ltd. Vehicle driving support system
GB9304638D0 (en) 1993-03-06 1993-04-21 Ncr Int Inc Wireless data communication system having power saving function
US5696903A (en) 1993-05-11 1997-12-09 Norand Corporation Hierarchical communications system using microlink, data rate switching, frequency hopping and vehicular local area networking
IT1270938B (en) 1993-05-14 1997-05-16 Cselt Centro Studi Lab Telecom PROCEDURE FOR THE CONTROL OF THE TRANSMISSION ON A SAME CHANNEL OF INFORMATION FLOWS AT VARIABLE SPEED IN COMMUNICATION SYSTEMS BETWEEN MOBILE VEHICLES, AND A SYSTEM USING SUCH PROCEDURE
US5317566A (en) 1993-08-18 1994-05-31 Ascom Timeplex Trading Ag Least cost route selection in distributed digital communication networks
US5631897A (en) 1993-10-01 1997-05-20 Nec America, Inc. Apparatus and method for incorporating a large number of destinations over circuit-switched wide area network connections
US5857084A (en) 1993-11-02 1999-01-05 Klein; Dean A. Hierarchical bus structure access system
US5412654A (en) 1994-01-10 1995-05-02 International Business Machines Corporation Highly dynamic destination-sequenced destination vector routing for mobile computers
JP2591467B2 (en) 1994-04-18 1997-03-19 日本電気株式会社 Access method
US5502722A (en) 1994-08-01 1996-03-26 Motorola, Inc. Method and apparatus for a radio system using variable transmission reservation
CA2132180C (en) 1994-09-15 2001-07-31 Victor Pierobon Massive array cellular system
JP3043958B2 (en) 1994-09-29 2000-05-22 株式会社リコー Network communication method by wireless communication
US6029217A (en) 1994-10-03 2000-02-22 International Business Machines Corporation Queued arbitration mechanism for data processing system
DE69433872T2 (en) 1994-10-26 2005-07-14 International Business Machines Corp. Medium access control scheme for wireless local area networks with interleaved variable length time division frames
US5618045A (en) 1995-02-08 1997-04-08 Kagan; Michael Interactive multiple player game system and method of playing a game between at least two players
US5555540A (en) 1995-02-17 1996-09-10 Sun Microsystems, Inc. ASIC bus structure
US5796741A (en) 1995-03-09 1998-08-18 Nippon Telegraph And Telephone Corporation ATM bus system
US5572528A (en) 1995-03-20 1996-11-05 Novell, Inc. Mobile networking method and apparatus
US5886992A (en) 1995-04-14 1999-03-23 Valtion Teknillinen Tutkimuskeskus Frame synchronized ring system and method
US5517491A (en) 1995-05-03 1996-05-14 Motorola, Inc. Method and apparatus for controlling frequency deviation of a portable transceiver
US6370475B1 (en) * 1997-10-22 2002-04-09 Intelligent Technologies International Inc. Accident avoidance system
US6405132B1 (en) * 1997-10-22 2002-06-11 Intelligent Technologies International, Inc. Accident avoidance system
US5822309A (en) 1995-06-15 1998-10-13 Lucent Technologies Inc. Signaling and control architecture for an ad-hoc ATM LAN
US5623495A (en) 1995-06-15 1997-04-22 Lucent Technologies Inc. Portable base station architecture for an AD-HOC ATM lan
US5781540A (en) 1995-06-30 1998-07-14 Hughes Electronics Device and method for communicating in a mobile satellite system
GB2303763B (en) 1995-07-26 2000-02-16 Motorola Israel Ltd Communications system and method of operation
GB9517943D0 (en) 1995-09-02 1995-11-01 At & T Corp Radio communication device and method
US6132306A (en) 1995-09-06 2000-10-17 Cisco Systems, Inc. Cellular communication system with dedicated repeater channels
US6192053B1 (en) 1995-09-07 2001-02-20 Wireless Networks, Inc. Enhanced adjacency detection protocol for wireless applications
US5615212A (en) 1995-09-11 1997-03-25 Motorola Inc. Method, device and router for providing a contention-based reservation mechanism within a mini-slotted dynamic entry polling slot supporting multiple service classes
US5805842A (en) 1995-09-26 1998-09-08 Intel Corporation Apparatus, system and method for supporting DMA transfers on a multiplexed bus
US5805593A (en) 1995-09-26 1998-09-08 At&T Corp Routing method for setting up a service between an origination node and a destination node in a connection-communications network
US5701294A (en) 1995-10-02 1997-12-23 Telefonaktiebolaget Lm Ericsson System and method for flexible coding, modulation, and time slot allocation in a radio telecommunications network
US5717689A (en) 1995-10-10 1998-02-10 Lucent Technologies Inc. Data link layer protocol for transport of ATM cells over a wireless link
US5920821A (en) 1995-12-04 1999-07-06 Bell Atlantic Network Services, Inc. Use of cellular digital packet data (CDPD) communications to convey system identification list data to roaming cellular subscriber stations
US5991279A (en) 1995-12-07 1999-11-23 Vistar Telecommunications Inc. Wireless packet data distributed communications system
US5878036A (en) 1995-12-20 1999-03-02 Spartz; Michael K. Wireless telecommunications system utilizing CDMA radio frequency signal modulation in conjunction with the GSM A-interface telecommunications network protocol
US5918180A (en) 1995-12-22 1999-06-29 Dimino; Michael Telephone operable global tracking system for vehicles
KR100197407B1 (en) 1995-12-28 1999-06-15 유기범 Communication bus architecture between process in the full electronic switching system
US5680392A (en) 1996-01-16 1997-10-21 General Datacomm, Inc. Multimedia multipoint telecommunications reservation systems
US5684794A (en) 1996-01-25 1997-11-04 Hazeltine Corporation Validation of subscriber signals in a cellular radio network
US5706428A (en) 1996-03-14 1998-01-06 Lucent Technologies Inc. Multirate wireless data communication system
US5652751A (en) 1996-03-26 1997-07-29 Hazeltine Corporation Architecture for mobile radio networks with dynamically changing topology using virtual subnets
US5796732A (en) 1996-03-28 1998-08-18 Cisco Technology, Inc. Architecture for an expandable transaction-based switching bus
US5805977A (en) 1996-04-01 1998-09-08 Motorola, Inc. Method and apparatus for controlling transmissions in a two-way selective call communication system
US5845097A (en) 1996-06-03 1998-12-01 Samsung Electronics Co., Ltd. Bus recovery apparatus and method of recovery in a multi-master bus system
US5787080A (en) 1996-06-03 1998-07-28 Philips Electronics North America Corporation Method and apparatus for reservation-based wireless-ATM local area network
SE518132C2 (en) 1996-06-07 2002-08-27 Ericsson Telefon Ab L M Method and apparatus for synchronizing combined receivers and transmitters in a cellular system
US5774876A (en) 1996-06-26 1998-06-30 Par Government Systems Corporation Managing assets with active electronic tags
JP3298416B2 (en) * 1996-07-01 2002-07-02 株式会社デンソー Toll road toll collection system, on-board unit for toll road toll collection system, and controller for toll road toll collection system
US5844905A (en) 1996-07-09 1998-12-01 International Business Machines Corporation Extensions to distributed MAC protocols with collision avoidance using RTS/CTS exchange
US5909651A (en) 1996-08-02 1999-06-01 Lucent Technologies Inc. Broadcast short message service architecture
US5987011A (en) 1996-08-30 1999-11-16 Chai-Keong Toh Routing method for Ad-Hoc mobile networks
JP3119182B2 (en) * 1996-12-04 2000-12-18 トヨタ自動車株式会社 Emergency call system
US6044062A (en) 1996-12-06 2000-03-28 Communique, Llc Wireless network system and method for providing same
US5903559A (en) 1996-12-20 1999-05-11 Nec Usa, Inc. Method for internet protocol switching over fast ATM cell transport
PL195219B1 (en) 1997-03-03 2007-08-31 Salbu Res & Dev Pty Ltd Expanded cellular communication system
US5877724A (en) 1997-03-25 1999-03-02 Trimble Navigation Limited Combined position locating and cellular telephone system with a single shared microprocessor
US6052594A (en) 1997-04-30 2000-04-18 At&T Corp. System and method for dynamically assigning channels for wireless packet communications
US5881095A (en) 1997-05-01 1999-03-09 Motorola, Inc. Repeater assisted channel hopping system and method therefor
US5870350A (en) 1997-05-21 1999-02-09 International Business Machines Corporation High performance, high bandwidth memory bus architecture utilizing SDRAMs
US6240294B1 (en) 1997-05-30 2001-05-29 Itt Manufacturing Enterprises, Inc. Mobile radio device having adaptive position transmitting capabilities
GB2326065B (en) 1997-06-05 2002-05-29 Mentor Graphics Corp A scalable processor independent on-chip bus
US6108738A (en) 1997-06-10 2000-08-22 Vlsi Technology, Inc. Multi-master PCI bus system within a single integrated circuit
US6134230A (en) 1997-08-29 2000-10-17 Telefonaktiebolaget Lm Ericsson Method for selecting a link protocol for a transparent data service in a digital communications system
US5987033A (en) 1997-09-08 1999-11-16 Lucent Technologies, Inc. Wireless lan with enhanced capture provision
US6163699A (en) 1997-09-15 2000-12-19 Ramot University Authority For Applied Research And Industrial Development Ltd. Adaptive threshold scheme for tracking and paging mobile users
US6067291A (en) 1997-09-23 2000-05-23 Lucent Technologies Inc. Wireless local area network with enhanced carrier sense provision
US6034542A (en) 1997-10-14 2000-03-07 Xilinx, Inc. Bus structure for modularized chip with FPGA modules
US6009553A (en) 1997-12-15 1999-12-28 The Whitaker Corporation Adaptive error correction for a communications link
US5936953A (en) 1997-12-18 1999-08-10 Raytheon Company Multi-mode, multi-channel communication bus
US6047330A (en) 1998-01-20 2000-04-04 Netscape Communications Corporation Virtual router discovery system
US6065085A (en) 1998-01-27 2000-05-16 Lsi Logic Corporation Bus bridge architecture for a data processing system capable of sharing processing load among a plurality of devices
US6130881A (en) 1998-04-20 2000-10-10 Sarnoff Corporation Traffic routing in small wireless data networks
US6078566A (en) 1998-04-28 2000-06-20 Genesys Telecommunications Laboratories, Inc. Noise reduction techniques and apparatus for enhancing wireless data network telephony
US6064626A (en) 1998-07-31 2000-05-16 Arm Limited Peripheral buses for integrated circuit
US6304556B1 (en) 1998-08-24 2001-10-16 Cornell Research Foundation, Inc. Routing and mobility management protocols for ad-hoc networks
US6115580A (en) 1998-09-08 2000-09-05 Motorola, Inc. Communications network having adaptive network link optimization using wireless terrain awareness and method for use therein
US6721305B1 (en) * 1998-10-09 2004-04-13 International Business Machines Corporation Wireless message courier
US6208870B1 (en) 1998-10-27 2001-03-27 Lucent Technologies Inc. Short message service notification forwarded between multiple short message service centers
US6285892B1 (en) 1998-11-24 2001-09-04 Philips Electronics North America Corp. Data transmission system for reducing terminal power consumption in a wireless network
GB9826873D0 (en) 1998-12-07 1999-01-27 Simoco Int Ltd Position monitoring system
US6104712A (en) 1999-02-22 2000-08-15 Robert; Bruno G. Wireless communication network including plural migratory access nodes
JP3537705B2 (en) * 1999-05-31 2004-06-14 本田技研工業株式会社 Automatic following system
US6147975A (en) 1999-06-02 2000-11-14 Ac Properties B.V. System, method and article of manufacture of a proactive threhold manager in a hybrid communication system architecture
US6453168B1 (en) 1999-08-02 2002-09-17 Itt Manufacturing Enterprises, Inc Method and apparatus for determining the position of a mobile communication device using low accuracy clocks
JP2001093069A (en) * 1999-09-24 2001-04-06 Matsushita Electric Ind Co Ltd Inter-vehicle linked emergency informing system
US6275707B1 (en) 1999-10-08 2001-08-14 Motorola, Inc. Method and apparatus for assigning location estimates from a first transceiver to a second transceiver
US6327300B1 (en) 1999-10-25 2001-12-04 Motorola, Inc. Method and apparatus for dynamic spectrum allocation
KR100669130B1 (en) 1999-11-03 2007-01-15 아이티티 매뉴팩츄어링 엔터프라이즈, 인코포레이티드 Methods and apparatus for coordinating channel access to shared parallel data channels
AU1588801A (en) 1999-11-08 2001-06-06 Itt Manufacturing Enterprises, Inc. Method and apparatus for organizing selection of operational parameters in a communication system
US6349210B1 (en) 1999-11-12 2002-02-19 Itt Manufacturing Enterprises, Inc. Method and apparatus for broadcasting messages in channel reservation communication systems
US6349091B1 (en) 1999-11-12 2002-02-19 Itt Manufacturing Enterprises, Inc. Method and apparatus for controlling communication links between network nodes to reduce communication protocol overhead traffic
JP2001328451A (en) * 2000-05-18 2001-11-27 Denso Corp Travel route estimating device, preceding vehicle recognizing device and recording medium
JP2001357480A (en) * 2000-06-12 2001-12-26 Matsushita Electric Ind Co Ltd Emergency informing equipment
DE60124931T2 (en) * 2000-09-27 2007-09-20 Aerosat Corp. TRANSMISSION SYSTEM FOR MOBILE PLATFORM

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3839959A1 (en) 1988-10-06 1990-04-12 Bosch Gmbh Robert EMERGENCY CALL DEVICE FOR A VEHICLE
US5943322A (en) 1996-04-24 1999-08-24 Itt Defense, Inc. Communications method for a code division multiple access system without a base station
WO2002011346A2 (en) 2000-07-31 2002-02-07 Motorola Inc. Method and apparatus for transferring data
US6807165B2 (en) 2000-11-08 2004-10-19 Meshnetworks, Inc. Time division protocol for an ad-hoc, peer-to-peer radio network having coordinating channel access to shared parallel data channels with separate reservation channel
US6873839B2 (en) 2000-11-13 2005-03-29 Meshnetworks, Inc. Prioritized-routing for an ad-hoc, peer-to-peer, mobile radio access system
US7072650B2 (en) 2000-11-13 2006-07-04 Meshnetworks, Inc. Ad hoc peer-to-peer mobile radio access system interfaced to the PSTN and cellular networks

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1573925A4

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006097177A1 (en) 2005-03-16 2006-09-21 Eastman Kodak Company Method and equipment for data transmission by ad-hoc network
US8014350B2 (en) 2005-03-16 2011-09-06 Eastman Kodak Company Method and equipment for data transmission by ad-hoc network
WO2010125321A1 (en) * 2009-04-30 2010-11-04 Alstom Transport Sa Method for transferring alarm data between a broken-down railway vehicle and a control centre and associated device
FR2945013A1 (en) * 2009-04-30 2010-11-05 Alstom Transport Sa METHOD FOR TRANSFERRING ALERT DATA BETWEEN A FAULT RAIL VEHICLE AND A CONTROL CENTER, ASSOCIATED DEVICE
RU2529582C2 (en) * 2009-04-30 2014-09-27 Альстом Транспорт Са Method of transmitting alarm data between railroad car involved in accident and control centre and corresponding device
US9266544B2 (en) 2009-04-30 2016-02-23 Alstrom Transport Technologies Method for transferring alarm data between a broken-down railway vehicle and a control center and associated device
DE102014214152A1 (en) * 2014-07-21 2016-01-21 Siemens Aktiengesellschaft A system for data exchange over long distances using near field communication links between mobile terminals

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AU2003223589A1 (en) 2003-11-03
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US6580981B1 (en) 2003-06-17
EP1573925A2 (en) 2005-09-14
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CA2481441A1 (en) 2003-10-30
JP2005528824A (en) 2005-09-22

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