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Publication numberUSRE45149 E1
Publication typeGrant
Application numberUS 13/846,794
Publication date23 Sep 2014
Filing date18 Mar 2013
Priority date28 Apr 1998
Fee statusPaid
Also published asCA2330001A1, CN1168231C, CN1298577A, EP1080552A1, EP1080552A4, EP1080552B1, US6078566, US6381222, US6421325, US6421329, US6560214, US6625126, US7965742, US20020181429, US20070191030, US20150141071, WO1999056415A1
Publication number13846794, 846794, US RE45149 E1, US RE45149E1, US-E1-RE45149, USRE45149 E1, USRE45149E1
InventorsDan Kikinis
Original AssigneeGenesys Telecommunications Laboratories, Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Methods and apparatus for enhancing wireless data network telephony, including quality of service monitoring and control
US RE45149 E1
Abstract
A system for wireless communication comprises an architecture of routers connected to a network and having connected transceivers for wireless transmission and reception of data, and a plurality of hand-held commuoicators adapted for users to communicate with the network through the routers. The system is adapted to provide wireless Data Network Telephony (DNT), and the hand-held communicators execute Quality of Service (QoS) code adapted to prioritize DNT packet code over all non-DNT traffic, thereby preserving the real-time nature of the DNT code.
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Claims(3)
What is claimed is:
1. A hand-held communication device, comprising:
microphone aod speaker apparatus including converters for reoderiog audio data as audible speech, and for rendering audible speech as audio data;
a communication interface comprising circuitry for receiving and sending the audio data on a cell-phooe network as Data Network Telephony (DNT) packets; and
circuitry including Digital Signal Processor (DSP) recognizing human speech and processing audio data for DNT calls, the circuitry prioritizing DNT data over any other data when transmitting on the cell-phone network, allowing substantially only human speech to be prepared as DNT packets for transmission.
2. The hand-held communication device of claim 1 wherein the device is implemented in the form of a cell phone.
3. The hand-held communication device of claim 1 further comprising a noise cancellation microphone and speaker apparatus for creating a nnise reduction zone in the region of a principle speech input microphone.
Description
CROSS-REFERENCE TO RELATED DOCUMENTS

The present invention application is a reissue application of U.S. Pat. No. 6,795,406 which issued on Sep. 21, 2004 based on application Ser. No. 09/955,323 filed on Sep. 17, 2001, which is a divisional application of prior co-pending application Ser. No. 09/351,998 filed on Jul. 12, 1999, now U.S. Pat. No. 6,625,126, entitled: “Methods and Apparatus for Enhancing Wireless Data Network Telephony, Including Quality of Service”, which is a divisional application of Ser. No. 09/069,221 filed on Apr. 28, 1998, now U.S. Pat. No. 6,078,566. The specification for Ser. No. 09/351,998 filed on Jul. 12, 1999 is incorporated herein in its entirety by reference.

FIELD OF THE INVENTION

The present invention is in the field of network communications, including Data Network Telephony (DNT), such as lnternet Protocol Network Telephony (lPNT) and pertains more particularly to methods and apparatus for enhancing DNT in narrow bandwidth wireless links.

BACKGROUND OF THE INVENTION

The art of telephony communication has grown in proportion with improved telephony infrastructure, equipment, and methods of practice. Conventionally and historically telephone communication has been practiced by use of networks that provide dedicated connections and guaranteed bandwidth, such as in Publicly Switched Telephony Networks (PSTN). ln such networks a call placed from a telephone connected to a local service is switched over dedicated channels to a destination, and as long as the connection is maintained, the dedicated path, having a dedicated bandwidth, is also maintained. Such networks may he termed Connection Oriented/Switched Telephony (COST) networks, and this term is used in this specification.

More recently, with the development of extensive data networks, of which the well-known Internet is a prime example, a newer type of telephony communication has been introduced. This form of telephony is termed herein Data Network Telephony (DNT), and, in the context of the Internet data network lnternet Protocol Network Telephony (IPNT). Data networks typically link computers over one or more sub-nets, which may include local area networks (LAN), wide area networks (WAN) such as the lnternet, company lntranets, and combinations of these and other data networks.

In DNT, such as lPNT, dedicated connectinns are not provided except in rare and special instances. Instead, digital audio data is prepared in standardized audio packets complete with header information and the like. The packets are prepared in near real-time and broadcast over the data network(s) connecting involved computers adapted for DNT applications. The header for each packet includes a destination for the packet.

Data Network Telephony, such as IPNT is well-known in the art, and wireless data transmission is also quite well-known in many applications. Internet service providers, for example, are recently providing high data-rate wireless Internet access by satellite systems, and, where bandwidth is not substantially restricted at the receiver's end, such systems have proven successful for WEB page delivery and the like. Such systems have not proved to be friendly for DNT applications, and there are a number of reasons, which apply to these kinds of systems and to other kinds of wireless systems of more limited bandwidth even more so.

The problems for Data Network Telephony in wireless systems are related tn the real-time nature of telephony data and the typically limited bandwidth available in such systems. In relatively high-bandwidth systems having a relatively large number of users the distribution probabilities provide a situation where it is uncommon for several or many users to demand unusual bandwidth at the same time. The phenomenon is known in the art as averaging. Even with known high-use times, it can be expected that distribution will be such that bandwidth will be adequate. In most wireless systems however, bandwidth is more precious, and averaging is hence not as helpful.

A contributing problem is in the nature of real-time audio data as opposed to data transmitting stored documents and the like, which may be called data-data as opposed to voice-data. Data-data is prepared in packets for transmission from stored data of known capacity. The number of data packets needed to transmit a stored document, whether text, graphic, audio, or other, is a known quantity. Moreover, there is no fundamental loss if such data becomes delayed in transit. Once it arrives at a destination, the document may be reproduced.

Voice-data packets for real-time conversations are different. The packets for voice-data have to be prepared and transmitted in essentially real time in both directions or a meaningful conversation cannot be held. Moreover, the magnitude of packaged voice-data for a conversation will be inflated by acoustical background noise, which under some conditions can double or triple or even further multiply the amount of data having to be sent, imposing severe demand on available bandwidth.

The inventor has carefully considered the possibilities of a number of types of potential DNT applications, and has determined that it is desirable to provide DNT in wireless systems of many sorts to take advantage of some of the inherent advantages of DNT over dedicated connection-type telephony systems, and to provide DNT capability in systems that also are capable of data transfer of the data-data type described above, such as of stored digital documents and entities. A novel system in this patent application is proposed, for example, using relatively small, battery-powered, hand-held computer communicators with DNT capability to be carried by users within range of multiple Network lnterface Adapters (satellite transceivers). In a preferred embodiment wireless communication is provided by RF signaling. The invention, however, is not limited to RF, and could be implemented in an Infra system or any other system providing wireless communication.

In such a system the Network lnterface Adapters may he coupled, for example, to a Local Area Network. Such a system would be quite useful on a company premises for workers to keep in touch, hold phone conversations, share documents locally (Campus lntranet), and communicate with the lnternet and other connected computers as well (Inter Campus lntranets or Extranets). Many variations of such systems are possible, but present technology does not render such systems really practical. Methods and apparatus according to various embodiments and aspects of the present invention, taught in enabling detail below, provide substantial improvements rendering such voice/data systems on narrow bandwidth links quite feasible and useful.

SUMMARY OF THE INVENTION

In a preferred embodiment of the present invention a data network telephony (DNT) system is provided, comprising a base station connected to a DNT-capable data network and to a wireless transceiver and adapted to operate the transceiver by a two-way, narrow-baod, multiple-chaonel, real-time duplex radio protocol, and to process DNT calls on the DNT-capable data network and to broadcast and receive the DNT calls to and from the plurality of communicator units via the transceiver as DNT data packets; aod a plurality of portable computer-enhanced communicator units, including microphooe and speaker apparatus, each adapted to communicate with the base station by the two-way real-time radio protocol and to process DNT calls. The portable, computer-enhaoced communicator units are adapted to prioritize DNT data over other data when transmitting on the wireless network, such that DNT data always is processed before non-DNT data.

In one embodiment the DNT-capable data network is a local area network (LAN).

Io some embodiments one or more of the communicator units is equipped with Digital Sigoal Processors (DSPs) adapted for recognizing human speech, and wherein audio data for DNT calls is processed hy the DSPs, allowiog substantially only human speech to be prepared as DNT packets for transmission. In other embodiments ooe or more of the communicator units is equipped with noise cancellation microphone and speaker apparatus adapted for creating a noise reduction zone in tbe region of a principle speech input microphone.

In aootber aspect, in a system providing wireless communication between a portable communication unit and a base station over a dedicated channel, wherein the portable device is adapted for Data Network Telephony (DNT), a method is provided for enhancing quality of DNT calls, comprising steps of (a) monitoring all outgoing wireless traffic at the portable communication unit; (h) recognizing DNT data as opposed to non-DNT data; and (c) transmitting DNT data always with preference over non-DNT data. In this method, in some embodiments the portable communication unit comprises a CPU and a memory, and the method is provided by the CPU executing a Quality of Service (QoS) algorithm stored in the memory. In other embodiments the method is provided by the CPU executing Quality of Service (QoS) code prnvided as a portion of an operating system (OS) or a BIOS.

BRIEF DESCRIPTION OF THE DRAWING FIGURES

FIG. 1 is an architectural overview of a wireless DNT system according to ao embodiment of the present invention.

FIG. 2 is a system diagram of the components and connectivity of components within a hand-held DNT device and associated network elements according to an embodiment of the present invention.

FIG. 3A is a block diagram illustratiog DSP function according to an embodiment of the present invention.

FIG. 3B is a perspective view of unit 100 of FIG. 1 showing speaker and microphone placement.

FIG. 4 is a conceptual diagram illustrating QoS components and negotiation according to an embodiment of the preseot ioveotion.

FIG. 5 is a block diagram illustrating dynamic address translation according to an embodiment of the present iovention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1 is an architectural overview of a wireless DNT voice-data system 99 according to ooe embodiment of the preseot inveotion. Wireless voice/data system 99 comprises a plurality of receiving/sending hand-held units 100-600 that may be carried and used by individuals mohile throughout a local area such as a corporate campus baviog several buildings, aod so oo. System 99 in various embodiments is a radio-frequency (RF) based communication system, aod may be a time-division-duplex multiple access (TDMA) system, a code-divisioo multiple access (CDMA) system, or any other type two-way wireless protocol system, all of which are well-known in the art or may be inveoted io the future, but that are essentially wireless systems.

ln other embodiments, voice/data system 99 may operate via infrared or other known or future form of wireless communication. Radio frequency systems are used in this embodiment for illustratioo because of their flexibility aod abundance in the art. In some situations a combination of wireless technology may be used such as RF in combination with infrared capability with the infrared capability attributed to peripheral devices that may be used with a system.

Each hand-held uoit 100-600 (there may be more or fewer) is of the form of a portable computer and communication device such as a palm-top computer. Such devices are knowo io the art and may be suitable for practice of the preseot iovention with addition of certain elements which will he clear from following descriptions. Each receiving/sending unit communicates via RF, as previously described, and has an RF interface module such as ioterface module 109 that is capable of receiviog and sending radio signals and has a oetwork ioterface capability.

Each unit 100-600 has appropriate computer functionality attributed to palm-top and other portable style computers, and is powered, in most embodiments, via rechargeable battery. ln some embodiments where portability is not an issue, they may be powered electrically via wall socket adapters as well, with recharge capability for battery packs. However, in a preferred embodiment unit 100 is portable. It will be apparent to the skilled artisan that many more units as allowed by available bandwidth may be used within a voice/data system 99.

Each unit 100-600 is capable of communicating in RF mode with a satellite transceiver 400 that may be located io a convenient proximity (communication range) to the sum of portable units within a sub-net of system 99. Satellite traosceiver 400 is dedicated to broadcasting and receiving data in RF mode to and from each unit such as unit 100-600 and has appropriate interface capability for computer communication as well as radio frequency sending and receiving capability. Satellite transceiver 400 is linked via dedicated digital connection 401 to a router 410 in the embodiment shown. This link may be any one of many sorts, such as serial pair, optical liok, and so on.

Router 410 is, more specifically, a digital routing oode, adapted for routing data packets as in a digital network like the Internet. However, io some specialized embodimeots wherein calls are received from a telephone network such as the Public Switch Telephone Network (PSTN) as well as from a digital network, a router encompassiog both types of telephony capabilities may be used. A router with dual capability (i.e. routing both PSTN calls that are converted to DNT calls and originally sourced DNT calls) is known to the inventor.

Router 410 is linked via digital network connection to a network 500. Network 500 may be of the form of a local area network (LAN), a wide area network (WAN), the Internet, an lntranet, or another type of public or private digital network koowo in the art. Router 410 may be further linked as illustrated via dedicated coonections 411, and 412 to other routers or transceivers (not shown) as would be the case with a multi-distributed system wherein voice/data systems such as system 99 are duplicated and distributed over a larger geographical area (i.e. a campus) and lioked to a network such as network 500. Dedicated connections 411 and 412 are identical in scope to connection 401 as previously described.

lo an exemplary system according to the inveotion, each transceiver, such as transceiver 400, communicates with users over 16 dedicated narrow-bandwidth channels. There may be, in some instances, more than 16 uoits 100-600 in a transceiver area and assigned to users and a transceiver channel. In some cases, a channel may be shared by two or more infrequent users while a frequeot user may have a dedicated channel. In embodiments of system 99 having multiple transceivers, users with communication devices roam from system to system as will be described further below.

According to a preferred embodiment of the present invention, DNT such as IPNT may be practiced by a user operating a portable communication device such as unit 100 while connected in wireless mode to a voice/data system such as system 99, enabling the user to actively send and receive real-time data associated with DNT as well as to perform other data tasks such as file downloading, uploading and the like without losing the quality of the real-time DNT communication. Such a user may also roam away from and out of range of system 99, in a multi-distributed embodiment, wherein any real-time data that was sent but not received by the user as he or she moves between transceiver regioos is immediately rerouted as the user is associated with a new satellite traosceiver. This feature allows a user to be completely mobile during real-time data transfer.

As previously described with refereoce to the background section, DNT is not curreotly practical wheo practiced on networks having narrow dedicated bandwidth such as TDMA or CDMA systems as compared to high bandwidth systems (i.e. satellite wireless aod coooection-oriented systems) whereio sufficient bandwidth for DNT and other data transfer can be assured by packet averaging techniques and so on. Therefore, it is an object of the invention to provide method and apparatus for enabling successful and ecooomical practice of DNT including IPNT over wireless networks of the prevalently existing narrow-bandwidth type described above. Such method and apparatus of the present invention is detailed in various embodiments below.

FIG. 2 is a system diagram of the components and connectivity of compooents within voice/data unit 100 of FIG. 1, and associated network elements external to unit 100 according to an embodiment of tbe present inveotion. Voice/data haod-held unit 100 is shown in FIG. 2 as a block diagram to reveal various components aod features, some of which are enabling to unique features of the preseot invention, aod some of which are standard features available in current art and geoeric to such devices.

Unit 100 has a central processing unit (CPU) 101 in this embodiment including a digital signal processor (DSP) 101a. ln some embodiments, DSP 101a may be separate from CPU 101, such as a separate chip communicating on bus 113. DSP 101a is adapted for voice recognition and may discern human voice from background ooise. DSP functionality as provided in tbis embodimeot is unique and is described in further detail below.

Because unit 100 is a portable computer as well as a DNT communication device, suitable memory for storing programs and data is provided as memory (MEM) 102 and non-volatile memory (NV MEM) 103.

A speech system 104 contains the necessary components for enabling DNT and lPNT telephony communication, aod for doing necessary A/D and D/A conversion between digital voice-data and analog voice signals from a microphone (mic) or to operate a speaker. In this embodiment, a microphone 106 and a speaker 105 are provided for audible send and receive fuoction. ln some cases ao additional ooise cancellation microphone 106b and a ooise caoccllatioo speaker 105b are included for tbe purpose of minimizing background noise. More detail regarding this unique noise elimination technique as applied to an embodiment of the present invention is provided below.

An infrared transceiver 107 is provided for the purpose of interfacing with peripherals that communicate via infrared sigoal. Iofrared transceiver 107 accepts input from such peripherals and converts the data to digital form for bus 113. Of course aoy other type of wired (such as USB) or wireless desktop network could he employed, including but oot limited to induction, RF and so forth. Data-data, as referenced in the background section, such as file documents and the like, may be converted to infrared data aod stored, executed, or printed on infrared-capable peripherals that may be used with system 99.

A standard keyboard 112 and screen 110 are provided to unit 100 as with most portable computers. The screen may be any of a broad variety of such devices as known in the art. The keyboard may be a QWERTY keyhoard or another sort. A mini-keyboard 111 may also adapt to unit 100 io some embodiments instead of keyboard 112 for the purpose of input for operation of unit 100, for example mimicking a simple telephone interface. Similarly, peripheral devices such as a full size keyboard 151 a PC 152 may communicate with unit 100 via infrared or other wired or wireless link as previously described. RF interface 109 provides digital wireless interface witb transceiver 400.

It will be apparent to one with skill in the art that there may be generic or new features inherent or koowo to the inventor to a palm-top or lap-top computer that are not described in detail in this embodiment. The inventor intends only to detail those aspects incorporated into unit 100 that are relevant to operation of the present invention. Commonly found components such as screen 110 aod keyboard 112 will not be described with great detail because to do so may obscure the innovative aspects of the present invention. More detail regarding the iooovative aspects according to embodiments of the preseot ioventioo are provided below.

Improved Noise Reduction for DNT Applicatioo

In embodiments of tbe inveotion each satellite transceiver 400 in the system of FIG. 2 (there may be additional such transceivers coooected to router 410, or to equivalent routers) typically broadcasts on a fixed number of channels within an assigned frequency range over an area surrounding tbe transceiver. Typically, each hand-held unit tunes to a particular channel, which may be negotiated with router 410 or other intelligence in the system. As a result there are typically a relatively small number of users in such a system in the raoge of one satellite, and each user is dealiog with router 410 through transceiver 400 over a very “thio pipe”. By thin pipe in this specification is meant a connection to a user via a channel with very limited bandwidth.

It appears to the present inventor tbat a major coocern when practicing DNT over such a narrow-band thin pipe is noise reduction capability. As previously descrihed in the background section, background nuise severely limits the bandwidth available, because as packets are prepared io substantially real time, packets must be prepared for background noise, even during long pauses in conversation. Bandwidth may therefore be wasted that could profitably be used for other purposes, such as exchange of data-data or, depending on the wireless network, for sharing with other users. The inventor proposes two approaches which may be used separately or may be combined to considerably reduce the waste of bandwidth by background noise for DNT over a narrow-band pipe.

The first implementation involves the use of DSP (see DSP 101a of FIG. 2) technology with speech recognition capability, and is described and illustrated below.

FIG. 3A is a block diagram illustrating DSP function according to an embodiment of the present inventioo wherein only voice data packets aod real data packets are sent during a transaction with a calling or called party.

DSP technology, while known in the art and applicable to many different types of products, is an innovative approach as it is applied to an embodiment of the present invention. The ioventor knows of no current narrow-band wireless application wherein DSP with speech recognition is used for the purpose of managing bandwidth whereby only necessary data packets for voice-data are created during a real time transaction such as a DNT voice call. Data-data associated with file transfers and the like are created oormally and sent along with voice data. ln some instances, CPUs can be used to perform DSP tasks, and hence no extra physical implementation of the DSP has to exist. Also, some newer DSP design lend themselves to handle general purpose CPU/MPU functions, and hence can haodle all aspects by themselves.

Referring now to FIG. 3A, as a user speaks into a microphone during a call. DSP 101a with speech recognition capability monitors ioput, sorts out speech from non-speech, and creates data packets for voice only and will not create packets during pauses when the user is not speaking. ln this way, bandwidth is made available for other functions because data packets containing background noise aod the like are never created. Data-data packets containing non-voice data such as file-transfer data and the like are created in normal fashion and sent along with DNT packets if the user is, of course, transferring a file and talking on the unit at the same time. This technique in this embodiment assumes that there is sufficient bandwidth for muti-task functions while actively engaged in a DNT call.

The speech recognition function of the DSP chip may be programmed or traioed to recogoize different languages and so oo. Also long sighs and other verbal non-descriptors may be ignored during the monitoriog and DNT packet generating process.

ln another embodiment of the present invention, a DSP chip with speech recognition capability is also provided in routers such as router 410. By using digital to analog conversion modules known in the art, incoming DNT packets, before encountering may be monitored by a similar DSP at router 410 and non-speech packets in a received DNT data stream can be eliminated, effectively making more efficient use of the narrow bandwidth of each channel to a user. DSP apparatus and techniques as described can effectively minimize bandwidth demand for DNT in narrow wireless channels in either or both directions.

FIG. 3B is a perspective view of unit 100 of FIG. 1 showing noise-cancellation speaker aod microphooe iocorporation. While DSP with speech recognition capability is effective in reducing unwanted background noise, it may not be 100 percent effective, therefore another noise reduction technique is used wherein possibly a second microphone 106b aod possibly ooe more speaker 105b are provided and strategically located on unit 100 for the purpose of canceling background noise that may be present at the users location. Depending on the implementation and the physical design of the device, additional MlC/SPKR may or may not be needed. If a system such as system 99 of FIG. 1 is implemented in an industrial setting, for example, background noise may be particularly significant. Speaker 105 and microphone 106 are used for normal speech and audio function during a DNT call or may be used in combinatioo for noise cancellation.

It will be apparent to one with skill in the art that there may be more than ooe noise-cancellation speaker 105b as well as more than one noise-cancellation microphone 106b in unit 100 without departing from the spirit and scope of the present invention. The number and location of such devices will depend in part on intended application. For example, in a quiet environment, they may not be needed at all, whereas, in a noisy environment maximum capability may be desired. ln general, the noise cancellation system works by intercepting background ooise by the auxiliary mic (106b), then playing background noise back through one or more noise cancellation speakers placed to cancel background noise in a region at the principle mic 106. Such noise cancellation is known in the art for such as traffic noise and the like, but application and implementation to background noise reduction enhancing DNT over narrow wireless links is surely unique aod not obvious

It will be appareot to ooe with skill in the art that caocellation speakers and microphones may be held separate from unit 100 without departing from the spirit and scope of the present invention. One example of this would be utilization of a noise cancellation head-set.

Pipe-mirroring in a Narrow Band Wireless Multi-access System

Attention is directed to FIG. 2, to hard wired link 401 between intelligent router 4I0 and transceiver 400. Router 410 is adapted to route data packets for both voice-data in DNT and data-data for such as file transfers to users in an area covered by transceiver 400. Typically each user is assigned a channel within tbe breadth of the transceiver. Therefore voice-data and data-data for each user nccupies just that chaonel io the wireless link between transceiver 400 and each user's hand-held unit. The hardwired link 401 is, however, preferably a single line, and carries all of the combioed data for all the users in the area of transceiver 400. This arrangement, however, can be troublesome, as router 410 sees only the combined baodwidth of all the channels. Therefore, in the event one or more of the users elects to download a large amount of data, router 410 would typically commaod the entire bandwidth of hardwired link 401 to transfer the data to transceiver 400, and any or all DNT communications may be interrupted. lo a preferred embodiment of the present invention, then, router 410 treats hardwired link 401 as though it were a link of the bandwidth of the wireless channel for each user, dividing the hardwired link into a number nf parallel pipes equal to the number of wireless channels used. Data management between real time voice-data and data-data is tberefore maintained for the system between the router and the users, and DNT may be effectively maintained for the individual users.

QoS Functionality on Ultra-thin Pipes

lo a preferred embodiment of the present inveotioo, in order to insure that DNT data is prioritized when sending a combination of DNT data and application data via the narrow-band wireless channel for each client, a basic but innovative Quality of Service (QoS) scheme is implemented on the clieot side.

Traditional bi-directional QoS application schemes such as resource reservation protocol (RSVP) and similar schemes are known by those skilled in the art to be only used in high bandwidth applications where there are many users sharing available bandwidth. It is also well known that QoS assurance on both ends nf a pipe has to be negotiated along the way from node to node. Also, QoS implementation across multiple networks is difficult. Some standardization is required so that all network poiots understand and support the language protocol of the scheme being used.

FIG. 4 is a conceptual diagram illustrating QoS management according to an embodiment of the present invention.

It is the intention of the inventor to provide a new, one-sided QoS implementation from the clients side to the other end of the pipe, namely router 410. This is accomplished in embodiments of the invention either with firmware that is embedded in NV MEM 103, or via a software application 501 installed in system memory available in unit 100. In this embodiment, an instance of application 501 also resides in router 410. The application provides a fixed algorithm that always prioritizes DNT data both in unit 100 and in router 410. In this way, DNT data, as real time data, is always assured sufficient bandwidth. If another data type such as data from file transfer is initiated while simultaneously engaging in a DNT call, all such packets are held until there is a pause in the speech wherein no DNT data is being transferred. The transferring of files initiated by unit 100 takes place only during data gaps in the prioritized DNT communication. This is a one directional feature that only effects the communication link between unit 100 and router 410, and the instances of application 501 at each end operate independently of the other. In other embodiments the unique uni-directional QnS routine may be used only at one end of the pipe or the nther, either in router 410 or in the user's hand-held unit.

Dynamic Address Translation

In yet another embodiment nf the present invention, a method is provided whereby a user may roam away from and out of range of a transceiver such as transceiver 400, and be smoothly and efficiently logged onto another transceiver in system 99.

FIG. 5 is a block diagram illustrating dynamic address translation according to an embodiment of the present invention. Three transceiver regions 97, 98 and 99 are shown provided by separate transceivers spaced apart from each other but with overlapping areas, as is known in the art for such wireless systems; as is done in cell-phone systems, for example. Together, reginns 97, 98, and 99 define a sub-net 404. Sub-net 404 is, in this case, serviced by a single router 410. Such a case may represent, for example, a technical campus. Each unit 100 is capable of operating on one or another of defined channels in each of regions 97-99, and RF tuning in the hand-held units is a matter of apparatus and procedures that are all well-known in the art.

Router 410 in this embodiment is a lower-level router in a multilevel routing system connected to a higher-level router 415 via link 413. In this embodiment router 415 is a Master router for the wireless system, and is linked to Net 500. Master router 415 may be linked as well to other lower-level routers such as router 417 in another subnet 405 equivalent to subnet 404, which in turn controls three transceivers, such as transceiver 418.

It will be apparent to the skilled artisan that there is a broad variety of architectures that might be implemented comprising routers in hierarchical levels, interconnection among routers, and connection of routers to transceivers to accomplish coverage of an area for such a wireless communication system. The architecture illustrated here is one of many possibilities, and is used for exemplary purposes to illustrate improved tracking of users across subnets in an embodiment of the present invention.

Generally speaking, when incoming DNT calls arrive at master router 415, they are routed appropriately hased on routing tables in the several routers. In the overall system, cach user may have a home lncation served by a particular transceiver connected to a particular router. A particular user may, for example, typically be found in region 99 served by transceiver 403 connected to router 410. This user will then be listed on the routing table of router 410 and the table of Master router 415. If a call comes in tn Master router 415 for this particular user, the call will be quickly routed to the proper end router and transceiver by virtue of the routing list entries. Each satellite transceiver such as transceiver 403 has a fixed number of channels, and a channel is assigned to each user.

The purpose of a distributed system of the sort illustrated in embodiments of the present invention, is to provide communication for all users regardless of the particular region (transceiver), and to allow users to move from region to reginn while maintaining communication.

As an example, the user nf unit 100, shown in FIG. 5 as resident in region 99, has decided to roam to region 97 covered by transceiver 402. In the system of various embodiments, locatinn negotiation is periodically executed by each unit in operatinn with the nearest transceiver. As long as a user does not move from one region to another, the routing tables do not change. As the user of unit 100 enters region 97, negotiation communication will occur with both transceivers 403 and 402. At some point the system will determine that the user is to be handed off to transceiver 402, at which time the routing tables are updated, deleting the particular user from transceiver 403 and assigning the user to transceiver 402.

Each hand-held unit tunes to the system-assigned channel, and unit 100 will initially negotiate with router 410 through transceiver 402 on the same channel that was assigned to the unit in region 99 served through transceiver 403. There may, however, be one or more users in region 97 assigned to the same channel, and once the routing tables are updated, the channel assignment may change in the newly-entered rcginn. Each transceiver, for example may have more channel capability than users expected at any one time to be in that reginn, and therefore may have unused channels at any point in time that may he assignable to users newly entering the particular region.

In this example, router 410 services both regioos 99 and 97 through transceivers 403 and 402 respectively, making this a relatively simple example of ripple. However, if the user of unit 100 were to roam to subnet 405, where the transceivers are controlled by router 417, then unit 100 would ping that new rnuter through the closest satellite transceiver, and negotiate entry into the new subnet. In this case the user would be moved frnm the routing table in router 410 to the routing table in router 417, rather than just updating the routing tahle in router 410 to a new transceiver and region.

In the process of rippling, users throughout the overall area covered by a wireless system are tracked, and their location relative to the network of transceivers is noted. Routing lists at each router are updated as users move from region to region in the manner described above, wherein the minimum change is made with minimum impact on the stored and updated data for the system.

When a user moves from region to region as has been described, and routing lists are updated, there will be instances wherein a user is receiving real-time data packets for DNT as the user's location is updated. At the time that the user is relisted io a new region, there may well he data packets delivered to the rnuter where the user was previously listed. In this instance real-time data packets, or for that matter any data packets, that are left behind io this manner, are retrieved and forwarded immediately to the router serving the region to which the user has been moved, so there is no apparent loss in the data stream for the roaming user.

It will be apparent to the skilled artisan that there may be a varying number of routers such as router 410 assigned a varying number of satellite transceivers without departing from the spirit and scope of the present inventioo. There may also be, in more sophisticated systems, several hierarchical levels of routers. There are many possibilities for system architecture.

Personal Router io Client

In yet another embodiment of the present invention a software application known to the inventor as a personal router application is employed for flexibility in routing. Complete and enabling detail for such a personal router system is taught in U.S. Pat. No. 6,148,074, assigned to the assignee of the present patent application.

Io the personal router system a user, through an executable application at the hand-held unit, may, among other capabilities, program alternative actions for incoming calls. For example, a user may need to leave an area, and a co-worker is selected to cover the first user's responsibilities. ln this case, the first user can program through the hand-held unit and the personal router applicatioo, for incomiog calls to the first user to be re-routed to the alternate. A hroad range of other alternatives is available, including automatic answering with pre-recorded messages, call-holding, and many others. ln a preferred embodimeot a user interface is provided whereio incoming calls are represeoted by icons on the user's screen, which the user may select to manipulate calls.

In one embodimeot the bulk of the personal router applicatioo is resident at the system routers, and each user has an interface whereby he/she may access the application on the system router in a client-server fashion, and edit routing rules on the router to effect the manner in which incoming calls for the user are handled. The rules that may be invoked in this manner are limited only by system capabilities and the user's needs.

The personal router application provides maximum flexibility to the user without requiring additional equipment. A user need not be resident in any one voice/data system in order to apply his personal routiog rules. By having an instance of the router application at each of the routers in the oetwork, a user may roam without losing access to personal routing capability. By utilizing a hierarchy of routers, personal routiog capability may be scaled up to cover a large geographical area such as routing calls to other sub-nets and so on.

It will he appareot to one with skill in the art that the personal routing applicatioo may be used in conjunctioo with other routing applicatioos that may be implemeoted separately from individual units without departing from the spirit and scope of the present invention. For example, as a DNT telephony application, routing software may be stored at a machine dedicated to ioterfacing with routers so that mnre complicated routing rules may be observed.

Practicing DNT Wireless Telephony on a CSMA/CD Type Network

All of the embodiments of the prescot invention as previously taught herein are applicable to assigned the typical bandwidth types of wireless networks such as TDMA and CDMA oetworks. However, successful practice of the present invention in various embodiments can be further enhanced by implemeoting a wireless protocol betweeo traosceivers and users based on the characteristics of carrier-sensed multiple-access oetworks including collisioo detection (CSMA/CD). This type of oetwork is most often employed as a hard-wired or wireless LAN architecture such as Ethernet.

In CSMA/CD all data is transmitted over a shared channel and each registered device that attempts to transmit data oo the network must first listen to see if the network is free (carrier seose). Each device has a preset priority to use the available baodwidth over the network (multiple access). If two devices attempt to transmit at the same time, a collision occurs which is detected by all devices on the network (collision detection). Each device typically plans it's second-attempt transmissioo at a random amount of time after a collision is detected. As all of this takes place in a matter of micro-seconds, CSMA/CD provides a means of efficiently utilizing available bandwidth in a wireless shared system.

Baodwidth-on-demand meaos that no device transmits during the transmissioo of another device on the network. Instead of iodividual channels of dedicated baodwidth being assigned to each unit, all incomiog DNT communications are broadcast over the oetwork wherein each unit picks up it's own coded informatioo via addressing within the packet frame.

CSMA/CD in wireless mode operates virtually the same as in hard-wired mode except that the network architecture with respect to linked devices would be closer than would be the case with a wired network. The inventor koows of no wireless CSMA/CD network that curreotly practices DNT. For purposes of the present inveotion the wireless CSMA/CD implementation could use existing wireless LAN technology with the replacement of RF/NIA adapters such as module 109 of FIG. 1 with existing LAN type oetwork adapters.

It will be apparent to one with skill in the art that the methods and apparatus of the preseot invention as taught by the various presented embodiments allows DNT iocluding IPNT to be practiced efficiently and economically oo a wireless narrow-band network having dedicated chaonels as well as a wireless network having a shared channel with carrier sense capability and collisioo detection capability without departing from the spirit aod scope of the present invention. For example, the methods aod apparatus of the present may be implemented in various networks such as TDMA, CDMA, Global System Mobile (GSM), and other similar networks as well as CSMA/CD type networks.

It will also be apparent to one with skill in the art that such a wireless network enhanced by methods and apparatus of the present inventioo may comprise a plurality of voice/data systems belnnging to one of a plurality of sub-nets each controlled by a router with each router linked to a LAN, a WAN, including but not limited tn, the lnternet. There are many other architectural possibilities with regards to building such networks. The spirit and scope of the present invention is limited only by the claims that follow.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US509548016 Jun 198910 Mar 1992Fenner Peter RMessage routing system for shared communication media networks
US52991986 Dec 199029 Mar 1994Hughes Aircraft CompanyMethod and apparatus for exploitation of voice inactivity to increase the capacity of a time division multiple access radio communications system
US532748622 Mar 19935 Jul 1994Bell Communications Research, Inc.Method and system for managing telecommunications such as telephone calls
US542085124 Nov 199330 May 1995At&T Corp.Method of multiple access
US54522898 Jan 199319 Sep 1995Multi-Tech Systems, Inc.Computer-based multifunction personal communications system
US553301931 Jan 19942 Jul 1996Motorola, Inc.Packet data in an analog cellular radiotelephone system
US55330266 Mar 19952 Jul 1996International Business Machines CorporationCommunication system including method and apparatus for maintaining communications with a mobile terminal
US555089331 Jan 199527 Aug 1996Nokia Mobile Phones LimitedSpeech compensation in dual-mode telephone
US558396512 Sep 199410 Dec 1996Sony CorporationMethods and apparatus for training and operating voice recognition systems
US559018817 Feb 199531 Dec 1996Iex CorporationRules-based call routing
US561082118 Nov 199411 Mar 1997Ibm CorporationOptimal and stable route planning system
US562587715 Mar 199529 Apr 1997International Business Machines CorporationWireless variable bandwidth air-link system
US562805512 Dec 19946 May 1997Telefonaktiebolaget L M Ericsson PublModular radio communications system
US570865514 Jun 199613 Jan 1998Telefonaktiebolaget L M Ericsson PublMethod and apparatus for addressing a wireless communication station with a dynamically-assigned address
US57110081 Mar 199520 Jan 1998Northern Telecom LimitedCellular packet data arrangement
US57269845 Oct 199510 Mar 1998Norand CorporationHierarchical data collection network supporting packetized voice communications among wireless terminals and telephones
US572953118 Oct 199517 Mar 1998Telefonaktiebolaget Lm EricssonBandwidth allocation
US573733118 Sep 19957 Apr 1998Motorola, Inc.Method and apparatus for conveying audio signals using digital packets
US57377063 Aug 19957 Apr 1998Bell Atlantic Network Services, Inc.Power system supporting CDPD operation
US574290519 Sep 199421 Apr 1998Bell Communications Research, Inc.Personal communications internetworking
US575208217 Oct 199512 May 1998Data RaceSystem for multiplexing pins of a PC card socket and PC card bus adapter for providing audio communication between PC card and computer sound system
US575778811 Jan 199626 May 1998Matsushita Electric Ind.Digital radio communication system with efficient audio and non-audio data transmission
US577135313 Nov 199523 Jun 1998Motorola Inc.System having virtual session manager used sessionless-oriented protocol to communicate with user device via wireless channel and session-oriented protocol to communicate with host server
US579906826 Nov 199725 Aug 1998Elonex I.P. Holdings Ltd.Smart phone integration with computer systems
US58024651 Oct 19961 Sep 1998Nokia Mobile Phones Ltd.Data transmission in a radio telephone network
US581253416 Aug 199622 Sep 1998Multi-Tech Systems, Inc.Voice over data conferencing for a computer-based personal communications system
US58319763 May 19963 Nov 1998Motorola, Inc.Method and apparatus for time sharing a radio communication channel
US586213429 Dec 199519 Jan 1999Gte Laboratories IncorporatedSingle-wiring network for integrated voice and data communications
US586749418 Nov 19962 Feb 1999Mci Communication CorporationSystem, method and article of manufacture with integrated video conferencing billing in a communication system architecture
US59038454 Jun 199611 May 1999At&T Wireless Services Inc.Personal information manager for updating a telecommunication subscriber profile
US590571315 Apr 199618 May 1999Hughes Electronics CorporationMethod and apparatus for analyzing digital multi-program transmission packet streams
US590571919 Sep 199618 May 1999Bell Communications Research, Inc.Method and system for wireless internet access
US59094322 Dec 19961 Jun 1999U.S. Philips CorporationDigital cordless telephony system, a radio base station, and a combination of a radio base station and a cordless handset
US59095594 Apr 19971 Jun 1999Texas Instruments IncorporatedBus bridge device including data bus of first width for a first processor, memory controller, arbiter circuit and second processor having a different second data width
US591094613 Jan 19978 Jun 1999Samsung Electronics Co., Ltd.Wireless internet network architecture for voice and data communications
US59179134 Dec 199629 Jun 1999Wang; Ynjiun PaulPortable electronic authorization devices and methods therefor
US59337784 Jun 19963 Aug 1999At&T Wireless Services Inc.Method and apparatus for providing telecommunication services based on a subscriber profile updated by a personal information manager
US593380513 Dec 19963 Aug 1999Intel CorporationRetaining prosody during speech analysis for later playback
US595332231 Jan 199714 Sep 1999Qualcomm IncorporatedCellular internet telephone
US595370011 Jun 199714 Sep 1999International Business Machines CorporationPortable acoustic interface for remote access to automatic speech/speaker recognition server
US59704122 Dec 199719 Oct 1999Maxemchuk; Nicholas FrankOverload control in a packet-switching cellular environment
US59830734 Apr 19979 Nov 1999Ditzik; Richard J.Modular notebook and PDA computer systems for personal computing and wireless communications
US599139510 Jun 199823 Nov 1999Genesys Telecommunications Laboratories, Inc.Implementation of call-center outbound dialing capability at a telephony network level
US601178418 Dec 19964 Jan 2000Motorola, Inc.Communication system and method using asynchronous and isochronous spectrum for voice and data
US60145695 Mar 199711 Jan 2000At&T Corp.Mobile interactive radio
US603527326 Jun 19967 Mar 2000Lucent Technologies, Inc.Speaker-specific speech-to-text/text-to-speech communication system with hypertext-indicated speech parameter changes
US604956519 Jun 199511 Apr 2000International Business Machines CorporationMethod and apparatus for audio communication
US60525652 Jul 199718 Apr 2000Kabushiki Kaisha ToshibaMobile communication terminal apparatus with data communication function
US60646537 Jan 199716 May 2000Bell Atlantic Network Services, Inc.Internetwork gateway to gateway alternative communication
US607856628 Apr 199820 Jun 2000Genesys Telecommunications Laboratories, Inc.Noise reduction techniques and apparatus for enhancing wireless data network telephony
US608153617 Dec 199727 Jun 2000Tantivy Communications, Inc.Dynamic bandwidth allocation to transmit a wireless protocol across a code division multiple access (CDMA) radio link
US608172028 Jun 199627 Jun 2000Hughes Electronics CorporationMethod and apparatus for allocating shared communication channels
US608833720 Oct 199711 Jul 2000Motorola, Inc.Method access point device and peripheral for providing space diversity in a time division duplex wireless system
US609773313 Jun 19971 Aug 2000Nortel Networks CorporationSystem and associated method of operation for managing bandwidth in a wireless communication system supporting multimedia communications
US610153115 Apr 19988 Aug 2000Motorola, Inc.System for communicating user-selected criteria filter prepared at wireless client to communication server for filtering data transferred from host to said wireless client
US611210310 Jul 199729 Aug 2000Puthuff; Steven H.Personal communication device
US61187789 Dec 199612 Sep 2000At&T Wireless Services, Inc.Method and apparatus for data network call processing
US612236018 Nov 199919 Sep 2000Genesys Telecommunications Laboratories, Inc.Negotiated routing in telephony systems
US612236518 Dec 199819 Sep 2000Genesys Telecommunications Laboratories, Inc.Method and apparatus for load-balancing of call processing between multiple call-destination sites and routing of calls by way of call-destination site control
US612848926 Mar 19993 Oct 2000Bell Atlantic Network Services, Inc.Use of cellular digital packet data (CDPD) communications to convey system identification list data to roaming cellular subscriber stations
US613779125 Mar 199724 Oct 2000Ericsson Telefon Ab L MCommunicating packet data with a mobile station roaming within an incompatible mobile network
US613803613 Mar 199724 Oct 2000Oki Telecom, Inc.Wireless telephone with voice data interface mode
US614465117 Jul 19987 Nov 2000Motorola, Inc.Data transmission within a wireless communication system
US61480744 Jun 199714 Nov 2000Genesys Telecommunications Laboratories, Inc.Personal desktop router
US616737413 Feb 199726 Dec 2000Siemens Information And Communication Networks, Inc.Signal processing method and system utilizing logical speech boundaries
US618519625 Jun 19966 Feb 2001Siemens AktiengesellschaftMethod for transmitting data packets according to a packet data service in a cellular mobile radio network provided for voice and data transmission
US618529110 Feb 19976 Feb 2001Genesys Telecommunication Laboratories, Inc.Personal desktop router
US619202929 Jan 199820 Feb 2001Motorola, Inc.Method and apparatus for performing flow control in a wireless communications system
US61989178 Jul 19986 Mar 2001Nortel Networks Ltd.System and method of operation for correctly routing location update service messages in a cellular digital packet data system
US620186319 Feb 199713 Mar 2001Genesys Telecommunications Laboratories, Inc.Personal desktop router
US62193462 Dec 199717 Apr 2001At&T Corp.Packet switching architecture in cellular radio
US622636113 Apr 19981 May 2001Nec CorporationCommunication method, voice transmission apparatus and voice reception apparatus
US625969124 Jul 199810 Jul 20013Com CorporationSystem and method for efficiently transporting dual-tone multi-frequency/multiple frequency (DTMF/MF) tones in a telephone connection on a network-based telephone system
US63046534 Dec 199816 Oct 2001At&T Corp.Method and apparatus for intelligent data network call setup
US631115731 Dec 199230 Oct 2001Apple Computer, Inc.Assigning meanings to utterances in a speech recognition system
US635989224 Nov 199719 Mar 2002Inventions, Inc.Remote access, emulation, and control of office equipment, devices and services
US637039423 Apr 19989 Apr 2002Nokia Mobile Phones LimitedSystem and a method for transferring a call and a mobile station
US638122213 Jul 199930 Apr 2002Genesys Telecommunications Laboratories, Inc.Noise reduction techniques and apparatus for enhancing wireless data network telephony
US638905530 Mar 199814 May 2002Lucent Technologies, Inc.Integrating digital data with perceptible signals
US642132912 Jul 199916 Jul 2002Genesys Telecommunications Laboratories, Inc.Methods and apparatus for enhancing wireless data network telephony including dynamic address translation
US64248302 Jun 199723 Jul 2002Telxon CorporationPortable data collection network with telephone and voice mail capability
US64456942 Mar 19983 Sep 2002Robert SwartzInternet controlled telephone system
US646305117 Jul 19978 Oct 2002Inter—tel, Inc.Internet calling system
US648058122 Jun 199912 Nov 2002Institute For Information IndustryInternet/telephone adapter device and method
US651925016 Apr 199911 Feb 2003Fanstel Systems, LlcQuick connect internet telephone and method therefor
US656021413 Jul 19996 May 2003Genesys Telecommunications Laboratories, Inc.Noise reduction techniques and apparatus for enhancing wireless data network telephony
US65708718 Oct 199627 May 2003Verizon Services Corp.Internet telephone service using cellular digital vocoder
US66147732 Dec 19972 Sep 2003At&T Corp.Packet transmissions over cellular radio
US662512612 Jul 199923 Sep 2003Genesys Telecommunications Laboratories, Inc.Method and apparatus for enhancing wireless data network telephony, including quality of service monitoring and control
US663650616 Nov 199821 Oct 2003Fanstel Systems, LlcInternet telephone system and method therefor
US667520310 Oct 20006 Jan 2004Symbol Technologies, Inc.Collecting data in a batch mode in a wireless communications network with impeded communication
US679540617 Sep 200121 Sep 2004Genesys Telecommunications Laboratories, Inc.Methods and apparatus for enhancing wireless data network telephony, including quality of service monitoring and control
US785283020 Sep 200414 Dec 2010Genesys Telecommunications Laboratories, Inc.Methods and apparatus for enhancing wireless data network telephony, including quality of service monitoring and control
US79657429 Jul 200221 Jun 2011Genesys Telecommunications Laboratories, Inc.Methods and apparatus for enhancing wireless data network telephony including a personal router in a client
US200701910309 Apr 200716 Aug 2007Genesys Telecommunications Laboratories, Inc.Method and Apparatus for Enhancing Wireless Data Network Telephony Including a Personal Router in a Client
AU745417B2 Title not available
CN1298577A26 Apr 19996 Jun 2001吉尼塞斯电信实验室公司Noise reduction techniques and apparatus for enhancing wireless data network telephony
EP0522213A111 Jul 199113 Jan 1993National Research Council Of CanadaSystem for separating speech from background noise
JP2002513240A Title not available
JPH08251229A Title not available
WO1999056415A126 Apr 19994 Nov 1999Genesys Telecommunications Laboratories, Inc.Noise reduction techniques and apparatus for enhancing wireless data network telephony
Non-Patent Citations
Reference
1Australian Patent Certificate No. 745417 issued Jul. 4, 2002 in Australian Patent Application No. 37609/99.
2EPO Office action dated May 10, 2007, issued in EP Application No. 99920021.5 (7 pages).
3Gomez, P. et al, "A DSP-Based Modular Architecture for Noise Cancellation and Speech Recognition", IEEE, 1998, pp. 178-181; XP010289917; ISBN: 0-7803-4455-3.
4International Preliminary Examination Report dated Jul. 24, 2000, issued in PCT/US99/08988 (6 pages).
5International Search Report dated Aug. 2, 1999, issued in PCT/US99/08988 (3 pages).
6JPO Certificate of Patent for Patent No. 3511594, dated Jan. 16, 2004, corresponding to JP Application No. 2000-546473.
7JPO Notice of Allowance dated Dec. 24, 2003, issued in JP Application No. 2000-546473 with English translation (2 pages).
8JPO Office action dated May 9, 2003, issued in JP Application No. 2000-546473 with English translation (4 pages).
9Matsumoto, M. et al., "A Proposal for a Connection Method to a Public Network Using Infrared Media", IEEE, 1995, XP010160591; ISBN: 0-7803-2955-4; pp. 506-511.
10Partial European Search Report dated Oct. 18, 2004, issued in EP Application No. 99920021.5 (6 pages).
11Perkins, Charles E., "Mobile IP", IEEE Communications Magazine, May 1997, pp. 84-99.
12SIPO Notification of Grant issued May 21, 2004 in Chinese Patent Application No. 99805535.2 (2 pages).
13SIPO Office action issued Nov. 1, 2002 in Chinese Patent Application No. 99805535.2 [English Translation] (4 pages).
14SIPO Office action issued Sep. 5, 2003 in Chinese Patent Application No. 99805535.2 [English Translation] (4 pages).
15Supplementary European Search Report dated Jan. 12, 2005, issued in EP Application No. 99920021.5 (6 pages).
16Woo, William, et al., "Handoff Enhancement in Mobile-IP Environment", 1996, IEEE, pp. 760-764.
17Written Opinion dated Feb. 16, 2000, issued in PCT/US99/08988 (6 pages).
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