WO2001039527A1 - Method and apparatus for providing remote, wireless access to a computer workstation - Google Patents

Method and apparatus for providing remote, wireless access to a computer workstation Download PDF

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Publication number
WO2001039527A1
WO2001039527A1 PCT/US2000/032294 US0032294W WO0139527A1 WO 2001039527 A1 WO2001039527 A1 WO 2001039527A1 US 0032294 W US0032294 W US 0032294W WO 0139527 A1 WO0139527 A1 WO 0139527A1
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WO
WIPO (PCT)
Prior art keywords
wireless
computer
signal
substation
computer workstation
Prior art date
Application number
PCT/US2000/032294
Other languages
French (fr)
Inventor
Neil D. Terk
Original Assignee
Terk Technologies Corp.
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 Terk Technologies Corp. filed Critical Terk Technologies Corp.
Priority to AU18001/01A priority Critical patent/AU1800101A/en
Publication of WO2001039527A1 publication Critical patent/WO2001039527A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
    • G06F3/0231—Cordless keyboards
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/1143—Bidirectional transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40—Transceivers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/038—Indexing scheme relating to G06F3/038
    • G06F2203/0384—Wireless input, i.e. hardware and software details of wireless interface arrangements for pointing devices

Definitions

  • This invention relates to remote control devices. More particularly, the present invention relates to wireless computer substations that communicate with computer workstations. Even more particularly, the present invention relates to a wireless computer substation, which is compact, portable, and capable of accessing and utilizing the hardware and software components of a stand-alone computer workstation to enable the operator of the substation to have full computer capabilities from a remote location.
  • the cornerstone of the Internet is its ease of accessibility to all age groups.
  • the popularity of the Internet grows exponentially, so too does the amount of questionable content on the Internet.
  • the combination of these features has spawned another area of interest, that is, the effective control of how a computer or workstation is to be used.
  • a wireless computer substation which communicates with a computer workstation.
  • the wireless computer substation of the present invention may be implemented in various forms including, but not limited to, an electronic tablet, a pen-based computer, a Palm-PilotTM, a wireless monitor and keyboard, and other similar devices.
  • any required computational ability such as that provided by a microprocessor, is situated remotely from the wireless computer substation.
  • the wireless computer substation need only include a display and preferably a keyboard.
  • the wireless computer substation may include a relatively small processing circuit to handle the minor tasks of processing the data entered on the keyboard or received by the transceiver, or placing the data in the proper format for being displayed, but any major processing function are performed outside the wireless computer substation and remotely thereto by the microprocessor or central processing unit of the workstation.
  • the first embodiment of the wireless computer substation includes a wireless transceiver, a minor processing circuit linked to the wireless transceiver, a display device linked to the minor processing circuit, a keyboard linked to the minor processing circuit, and a manual entry device linked to the minor processing circuit.
  • the minor processing circuit may include at least one of a microprocessor, a microcontroller, an application specific integrated circuit (ASIC), a programmable logic device, a discrete logic device, and a gate array.
  • the first embodiment of the computer workstation includes a wireless transceiver for communicating with the wireless transceiver of the wireless computer substation, a microprocessor or microcontroller linked to the wireless transceiver of the computer workstation, a display device linked to the microprocessor, a keyboard linked to the microprocessor, a manual entry device linked to the microprocessor, and one or more peripheral devices linked to the microprocessor.
  • the microprocessor of the workstation is preferably capable of accepting and interpreting a signal directly from the wireless transceiver of the workstation such that the microprocessor can control the operation of the circuits connected thereto, although additional circuitry external to the microprocessor may be added for this purpose. It is anticipated that the first embodiment of the workstation will be provided to the consumer with the capability of communicating with the wireless computer substation of the present invention.
  • the operator of the wireless computer substation enters commands through either the keyboard or another manual entry device, such as a mouse. These commands, which are digital signals, are then routed to the minor processing circuit within the substation.
  • the minor processing circuit interprets and translates these signals to be compatible with the wireless transceiver of the substation.
  • the transceiver accepts and converts the signals from the minor processing circuit into a wireless signal, which is transmitted to the wireless transceiver of the computer workstation.
  • the transceiver Upon receipt of the wireless signal from the wireless transceiver of the substation, the transceiver converts the wireless signal to a digital signal, which is routed to the microprocessor of the workstation. The microprocessor then interprets the digital signal and performs the appropriate task preferably as if the command had originated from the workstation. For instance, the computer workstation may transmit the command to a peripheral device, such as a modem or printer. The peripheral device would then perform the appropriate task and may relay a digital signal back to the microprocessor. In the first embodiment of the workstation, the relayed digital signal is routed back to the wireless transceiver of the workstation.
  • the workstation transceiver then converts the digital signal into a wireless signal, which is transmitted to the wireless transceiver of the substation.
  • the wireless transceiver of the substation then converts the wireless signal to a digital signal, which is routed to the minor processing circuit of the substation.
  • the substation minor processing circuit interprets the digital signal and sends the appropriate commands to the display device of the substation, which displays the corresponding information.
  • the second embodiment of the computer workstation includes a wireless transceiver for communicating with the wireless transceiver of the computer substation, a minor processing circuit linked to the wireless transceiver of the computer workstation, a microprocessor linked to the minor processing circuit of the computer workstation, a display device linked to the microprocessor, a keyboard linked to the microprocessor, a manual entry device linked to the microprocessor, and one or more peripheral devices linked to the microprocessor.
  • the transceiver and minor processing circuit of the workstation are add-on devices within a communication interface unit, which communicates with the microprocessor of the existing workstation through a parallel or serial port.
  • the add-on minor processing circuit preferably accepts the digital signal from the add-on wireless transceiver and converts that digital signal into a command format that the unmodified microprocessor of the workstation can recognize. It is anticipated that the second embodiment of the workstation will be provided to the consumer as a means for retrofitting existing computer workstations to be compatible with the wireless computer substation of the present invention.
  • the unmodified microprocessor then processes the commands preferably as if they originated from the workstation, which may include sending those commands to a peripheral device, such as a modem or printer.
  • the peripheral device would then perform the command and return the appropriate information in the form of a digital signal back to the microprocessor.
  • the microprocessor then relays that digital signal back to the add-on communication interface unit, which translates it into a format that is recognizable by the add-on wireless transceiver.
  • the add-on transceiver then converts the digital signal into a wireless signal and transmits that wireless signal to the wireless transceiver of the substation.
  • the wireless transceiver of the substation then converts the received wireless signal to a digital signal and routes it to the minor processing circuit in the substation.
  • the substation minor processing circuit then converts the digital signal to an appropriate format, such as a video signal, which is routed to and displayed by the display device of the substation.
  • the second embodiment of the wireless computer substation comprises a separate wireless display device and a separate wireless manual entry device.
  • the wireless manual entry device is linked to a wireless transmitter.
  • the wireless display device is linked to a wireless receiver.
  • the operator of the wireless computer substation enters commands through either the wireless keyboard or manual entry device. These commands, which are digital signals, are then routed to the minor processing circuit within the wireless manual entry device. The minor processing circuit then routes the digital signals to the wireless transmitter of the wireless manual entry device, which accepts and converts the digital signals into a wireless signal. The wireless signal is then transmitted to the wireless transceiver of the computer workstation described above.
  • the computer workstation is provided with a wireless transceiver, which accepts the wireless signal from the transmitter of the wireless manual entry device and converts the wireless signal into a digital signal, which is routed to the microprocessor of the workstation.
  • the microprocessor interprets the digital signal and sends the appropriate command to the appropriate circuit connected to the microprocessor, which may be a peripheral device, such as a modem or printer.
  • the peripheral device then performs the command and relays a digital signal back to the microprocessor.
  • the relayed digital signal is then routed back to the wireless transceiver of the workstation.
  • the workstation transceiver then converts the digital signal into a wireless signal, which is transmitted to the wireless receiver of the wireless display device.
  • the wireless signal is then translated into an appropriate format and displayed by the display device.
  • the substation of the present invention can be utilized to view the activities transpiring at the workstation. For example, a parent, from a remote location within her home, can view the activities of her children at the family computer without their knowledge.
  • the operator of the substation can advantageously utilize the hardware and software resources of the computer workstation without interrupting the operator located at the workstation. This will enable, for example, a child to access the Internet or play games while a parent accesses programs to balance his checkbook, type a letter, or separately access the Internet to download a newspaper or other information.
  • Figure 1 is a pictorial illustration of one embodiment of a communication link between a wireless computer substation and a computer workstation formed in accordance with the present invention.
  • Figure 2 is a block diagram of electronic circuitry for a first embodiment of the wireless computer substation formed in accordance with the present invention.
  • Figure 3 is a block diagram of electronic circuitry for a first embodiment of the computer workstation formed in accordance with the present invention.
  • Figure 4 is a pictorial illustration of a second embodiment of a communication link between the wireless substation and the computer workstation formed in accordance with the present invention.
  • Figure 5 is a block diagram of the electronic circuitry for a second embodiment of the computer workstation formed in accordance with the present invention.
  • Figure 6 is a pictorial illustration of a communication link between a second embodiment of the wireless substation and the computer workstation formed in accordance with the present invention.
  • Figure 7 is a block diagram of the electronic circuitry for the second embodiment of the computer substation formed in accordance with the present invention.
  • the wireless computer substation 1 includes a wireless transceiver 3, a minor processing circuit 4 linked to the wireless transceiver 3, a display device 5 linked to the minor processing circuit 4, a keyboard 6 linked to the minor processing circuit 4, and a manual entry device 7 linked to the minor processing circuit 4.
  • any required computational ability such as that provided by a microprocessor, is situated remotely from the wireless computer substation.
  • the wireless computer substation need only include a display and preferably a keyboard.
  • the wireless computer substation may include a relatively small processing circuit to handle the minor tasks of processing the data entered on the keyboard or received by the transceiver, or placing the data in the proper format for being displayed, but any major processing function are performed outside the wireless computer substation and remotely thereto by the microprocessor or central processing unit of the workstation.
  • the operator of the wireless computer substation 1 enters commands through either the keyboard 6 or the manual entry device 7, such as a mouse, trackball, or touch pad. This entry of commands is performed in the same manner as entry of commands at a hardwired keyboard or mouse.
  • the entered commands are then preferably routed through the appropriate decoder or controller (9, 10) for conversion of the command to a digital signal. For example, if the operator entered a command through the keyboard 6, this command would then be sent to a keyboard decoder 9, which would convert the command to a digital signal.
  • the digital signal output by the appropriate decoder or controller (9, 10) is then routed to the minor processing circuit 4 within the computer substation 1.
  • the minor processing circuit 4 then routes the digital signal to the wireless transceiver 3.
  • the minor processing circuit 4 used within the computer substation 1 may include a microprocessor, a microcontroller, an application specific integrated circuit (ASIC), a programmable logic device, a discrete logic device, and a gate array. The choice of device will be based upon the desired capabilities of the computer substation, the cost requirements, and the ease of integration with the remaining components of the substation, to name a few. It is to be understood that the decoders, controllers, and minor processing circuit (8, 9, 10, 4) are optional and that the functions performed thereby may be carried out by the remaining components in the substation 1.
  • the first wireless transceiver 3 then converts the digital signal to a wireless signal, which is capable of being transmitted to and understood by a second wireless transceiver 11 of the computer workstation 2, as shown in Figure 3.
  • the wireless transceivers 3 and 11 can be any type of transceivers that are capable of converting a digital signal to a wireless signal, and then transmitting and receiving wireless transmissions to and from other compatible transceivers.
  • the transceivers 3 and 11 can be infrared (IR) transceivers, radio frequency (RF) transceivers, microwave transceivers, or a combinations of two or more of these.
  • the wireless transceiver preferably includes the appropriate components required to convert the digital signal to an appropriate wireless signal. These components include active and passive devices, such as transistors, resistors, capacitors, filters, modulators, diodes (for IR transmission), and antennas (for RF transmission) to name a few.
  • the first embodiment of the computer workstation 2 includes the second wireless transceiver 11 , which communicates with the first wireless transceiver 3 of the computer substation 1, and thus accepts the incoming wireless signal.
  • the second wireless transceiver 1 1 then converts the wireless signal to a digital signal and routes the digital signal to a microprocessor 12 such that the microprocessor 12 can control the operation of the circuits connected thereto.
  • the microprocessor 12 of the workstation 2 is preferably capable of accepting a digital signal directly from the second wireless transceiver 11.
  • the microprocessor is typically implemented with memory devices broadly categorized as random access memory (RAM) and read only memory (ROM).
  • RAM random access memory
  • ROM read only memory
  • the CPU uses the ROM for permanent storage of constants and operational software, and uses the RAM for temporary storage of variables.
  • the digital signal output by the microprocessor 12 is then routed to an appropriate device controller (13, 16, 17) which interprets the digital signal and converts it into a command recognizable by the appropriate peripheral device (18, 21, 22), such as a display, modem, or printer.
  • the peripheral device then performs the command and may relay the information back to the appropriate device controller (16, 17).
  • the device controller (16, 17) then converts the information into an appropriate digital signal, which is routed to the microprocessor 12 of the workstation.
  • the digital signal from the device controller (16, 17) is then routed back to the second wireless transceiver 11 of the workstation.
  • the second wireless transceiver 11 then converts the digital signal to a wireless signal and transmits the wireless signal to the first wireless transceiver 3 of the substation 1.
  • the first wireless transceiver 3 of the substation then converts the wireless signal to a digital signal, which is routed to the minor processing circuit 4 of the substation 1.
  • the minor processing circuit 4 then sends the digital signal to, for example, a display controller 8, which converts the digital signal to a command recognizable by the display device 5 of the substation 1.
  • the display device 5 then displays the information that corresponds to the received command.
  • the operation of the wireless computer substation 1 essentially includes entering a command through a manual entry device 7, such as a keyboard 6 or mouse. This command is then converted to a digital signal within the substation by an appropriate device controller. The digital signal is then routed to a minor processing circuit 4, which, in turn, routes the signal to the first wireless transceiver 3. The first wireless transceiver 3 then converts the digital signal to a wireless signal and transmits that wireless signal to the second wireless transceiver 11 of the computer workstation 2.
  • the second wireless transceiver 1 1 of the workstation 2 then converts the wireless signal to a digital signal, which is sent to the workstation microprocessor 12.
  • the workstation microprocessor 12 then routes the digital signal to the intended peripheral device controller (13-17), which converts the digital signal into a command recognizable by the attached peripheral device (18-22).
  • the peripheral device (18-22) then performs the task corresponding to the transmitted command and may return information.
  • This information is then sent back to the device controller (13-17) and converted into a returning digital signal.
  • the returning digital signal is then routed to the microprocessor 12 of the workstation 2 and sent to the second wireless transceiver 11.
  • the second wireless transceiver 11 then converts the digital signal to a wireless signal and transmits the returning wireless signal to the first wireless transceiver 3 of the substation 1.
  • the returning wireless signal is then converted by the first wireless transceiver 3 to a returning digital signal, which is sent to the minor processing circuit 4.
  • the minor processing circuit 4 then routes the returning digital signal to the appropriate device controller (8-10), such as a display controller 8.
  • the display controller 8 then converts the digital signal to a command recognizable by the display device 5, such as a monitor.
  • the display device 5 displays the information requested by the incoming command for the operator of the substation to view, thus completing the operation process. This transmitting, gathering, and relaying of commands from the substation to the workstation will continue until the operator of the substation wishes to no longer access the computer workstation 2.
  • Figures 4 and 5 show a second embodiment of the computer workstation, generally referred to as 50, for use with the substation 1 of the present invention.
  • the substation 1 for use with the second embodiment of the computer workstation 50 is essentially identical to that of the substation described above. Therefore, the structure of the substation is incorporated into this embodiment and need not be discussed in detail.
  • the second embodiment of the computer workstation 50 shows the second wireless transceiver 51 and the minor processing circuit 52 as add-on units, generally referred to as a communication interface unit 70.
  • the transceiver 51 and minor processing circuit 52 of the workstation communicate with an unmodified microprocessor 55 of an existing workstation 50 through a parallel or serial port.
  • the second wireless transceiver 51 of the add-on unit 70 receives the incoming wireless signal from the substation first wireless transceiver 3.
  • the received wireless signal is then converted to a digital signal and routed to the minor processing circuit 52.
  • the digital signal is then routed, via a serial or parallel connection, to the unmodified microprocessor 55 of the existing computer workstation 50.
  • the microprocessor 55 then routes the digital signal to the appropriate device controller (56, 59, 60) which, in turn, converts the digital signal to a command recognizable by the peripheral device (61, 64, 65), such as a display 61, modem, or printer.
  • the peripheral device (61, 64, 65) then performs the commands sent to it.
  • the peripheral device may return the information via the device controller (56, 59, 60), the unmodified microprocessor 55, the minor processing circuit 52, and the second wireless transceiver 51 back to the substation 1 for display on the display device 5 of the substation 1.
  • One advantage of the second embodiment is that existing computer workstations may be retrofitted with an add-on unit.
  • the add-on unit enables the wireless computer substation 1 to be used without the need for modifying the existing workstation.
  • FIGs 6 and 7 show a second embodiment of the wireless computer substation for use with either embodiment of the computer workstation described above.
  • the second embodiment of the wireless computer substation includes a separate wireless display device 100 and a separate wireless manual entry device 120.
  • the wireless manual entry device 120 includes a wireless transmitter 124, a minor processing circuit 123 linked to the wireless transmitter 124, a keyboard 121 linked to the minor processing circuit 123, and a manual entry device linked to the minor processing circuit 123.
  • the wireless display device 100 includes a wireless receiver 103 and a display 101 linked to the wireless receiver 103 through a display controller/minor processing circuit 102. It is to be understood that the decoders, controllers, and minor processing circuit (102, 122, 126, 123) are optional and that the functions performed thereby may be carried out by the remaining components in the substation 1.
  • the operator of the wireless manual entry device 120 enters commands through either the wireless keyboard 121 or the manual entry device 125. This entry of commands is performed in the same manner as entry of commands via a hardwired keyboard or mouse. The entered commands are then routed through the appropriate decoder or controller (122, 126) for conversion of the command to a digital signal. For example, if the operator entered a command on the keyboard 121, this command would then be sent to a keyboard decoder/controller 122 which, in turn, would convert the command into a format suitable for the minor processing circuit 123.
  • the digital signal output by the appropriate decoder or controller (122, 126) is then routed to the minor processing circuit 123 within the wireless manual entry device 120.
  • the minor processing circuit 123 then routes the digital signal to the wireless transmitter 124.
  • the wireless transmitter 124 then converts the digital signal to a wireless signal, which is capable of being transmitted to and understood by the wireless transceiver 1 1 in the computer workstation.
  • the wireless transmitter 124 can be any type of transmitter which is capable of converting a digital signal to a wireless signal, and then sending wireless transmissions to other compatible transceivers.
  • the transmitter 124 can be infrared (IR), radio frequency (RF), microwave, or a combinations of two or more of these.
  • the wireless signal can be transmitted as an analog signal or a digital signal while remaining within the scope of the present invention.
  • the computer workstation is provided with a wireless transceiver, which accepts the wireless signal from the transmitter 124 of the keyboard/manual entry device and converts the wireless signal to a digital signal, which is routed to the microprocessor of the workstation.
  • the microprocessor interprets the digital signal and may send the appropriate command to the intended peripheral connected to the microprocessor.
  • the peripheral device performs the commands and may relay a digital signal back to the microprocessor.
  • the relayed digital signal is then routed back to the wireless transceiver of the workstation.
  • the workstation transceiver then converts the digital signal into a wireless signal, which is transmitted to the wireless receiver 103 of the wireless display device 100.
  • the wireless signal is then routed to the display controller 102, interpreted into the appropriate commands, and displayed by the display device 101.
  • the computer substation of the present invention can be utilized to view the activities transpiring at the workstation. For example, a parent, from a remote location within her home, may view the activities of her child at the family computer without that child's knowledge. This is accomplished by having the same information that is output to the display device of the workstation also routed to the substation display device.
  • the operator of the substation can utilize the hardware and software resources of the computer workstation without the need to interrupt the operator positioned at the workstation. This will enable, for example, a child to access the Internet or play games while a parent accesses programs to balance his checkbook, type a letter, or separately access the Internet to download a newspaper or other information.
  • the wireless computer substation of the present invention can be embodied in various forms including, but not limited to, an electronic tablet, a pen- based computer, a Palm-PilotTM, and other similar devices.
  • BluetoothTM refers to a technology specification for small form factor, low-cost, short-range radio links between mobile personal computers, mobile phones, and other portable devices.
  • BluetoothTM-equipped devices When two BluetoothTM-equipped devices come within a 10-meter range of each other, they can establish a link. Since BluetoothTM utilizes a radio-based link, it doesn't require a line-of-sight connection in order to communicate. Information can be sent from a laptop to a printer in the next room, or a microwave oven can send a message to a mobile phone telling you that your meal is ready.
  • BluetoothTM will allow for the replacement of many propriety cables that currently connect one device to another with one universal radio link. Its essential features are robustness, low complexity, low power, and low cost. Designed to operate in noisy frequency environments, a BluetoothTM transceiver uses a fast acknowledgement and frequency hopping scheme to make the link robust. BluetoothTM modules operate in an unlicensed band at 2.4 GHz, and avoid interference from other signals by hopping to a new frequency after transmitting or receiving a packet. Compared with other systems in the same frequency band, a BluetoothTM module hops faster and uses shorter packets.
  • Spread spectrum is an advanced form of data transmission, which provides increased security, clarity, and range.
  • the primary difference between conventional fixed-frequency transmission and spread spectrum transmission is multi-channel operation.
  • a fixed frequency transmission device is designed to use only one channel (or radio frequency) at a time. Such devices will not switch to a new channel unless they encounter interference or the user manually changes the channel.
  • spread spectrum technology uses multiple frequencies or channels. This process is completely transparent to the user. The benefits of spread spectrum transmission are due to this multi-channel format.
  • a spread spectrum device spreads the signal across virtually the entire 900 MHz bandwidth (between 902 & 928 MHz). This process ensures that the transmission is secure, because only the transmitter and receiver know the pre-assigned spreading code, preventing someone from locking on and eavesdropping on the transmission.
  • Spreading the transmitted signal over a very large bandwidth also provides improved clarity, as this technology circumvents traditional sources of interference.
  • the third major benefit of spread spectrum technology is increased range.
  • the Federal Communications Commission (FCC) allows spread spectrum transmission at a higher power level than conventional, fixed-frequency transmission.
  • the justification for increased power levels is a direct result of the multi-channel format.
  • the apparatus formed in accordance with the present invention provides a compact and portable wireless computer substation, which can access and utilize the hardware and software resources of a computer workstation, and view the activities transpiring at the workstation from a remote location.
  • the method in accordance with the present invention distributes the computational power of a workstation to remote sites in a cost-effective and readily accessible manner, and enables the content, operation, performance, and activities of the workstation to be monitored from a remote location.

Abstract

A wireless computer substation (1) provides access to hardware and software resources of a computer or workstation (2). A first embodiment of the substation (1) includes a display (5) and a manual entry device (7), such as a keyboard (6). In a preferred form a minor processing circuit (4), is coupled to a wireless transceiver (3) in the substation (1). A second embodiment of the substation (1) implements the display (100) and manual entry device (120) as separate units. The wireless display (100) includes the display (101) and a wireless receiver (103), and the wireless manual entry device (120) includes the manual entry device (125) and a wireless transmitter (124). A first and second embodiment is provided where a communication link is established between wireless transmitters and receivers in the substation (1) and workstation (2) to provide a user at the substation (1) with access to the capabilities of the workstation (2) or to monitor activities being performed at the workstation (2).

Description

METHOD AND APPARATUS FOR PROVIDING REMOTE, WIRELESS ACCESS TO A COMPUTER WORKSTATION
CROSS-REFERENCE TO RELATED APPLICATION
This application claims the benefit and priority of U.S. Provisional Application
Serial No. 60/166,792, entitled "Wireless Computer Substation", filed on November 22, 1999, the disclosure of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
Field of the Invention
This invention relates to remote control devices. More particularly, the present invention relates to wireless computer substations that communicate with computer workstations. Even more particularly, the present invention relates to a wireless computer substation, which is compact, portable, and capable of accessing and utilizing the hardware and software components of a stand-alone computer workstation to enable the operator of the substation to have full computer capabilities from a remote location.
Brief Description of the Related Art
As computer workstations and personal computers become more powerful, the concept of distributing this power and making it more accessible to a larger number of people has emerged. During the advent of personal computers, the user could expect to wait a substantial amount of time to perform what we now consider mundane tasks.
In contrast, some of the most basic computers and workstations currently being offered for sale have the capability of performing multiple tasks submitted by groups of users. However, the user typically must buy multiple computers if two or more users are expected to operate these machines concurrently. Thus, the user is forced to waste valuable computational power by purchasing additional computers. Laptop computers have become extremely popular since they provide the power of desktop computers and can readily be transported wherever necessary. However, a laptop typically costs two to three times that of a comparable desktop computer. In addition, users often do not need the full capabilities provided by a laptop, which again results in the waste of valuable computational power simply because a user needs portable computational ability.
The cornerstone of the Internet is its ease of accessibility to all age groups. However, as the popularity of the Internet grows exponentially, so too does the amount of questionable content on the Internet. The combination of these features has spawned another area of interest, that is, the effective control of how a computer or workstation is to be used. There is currently no cost-effective way that, for instance, a parent can concurrently monitor content being viewed by her child without standing behind that child. This method is obviously ineffective since the curiosity of a child is likely to be quenched while a parent is looking over the child's shoulder.
OBJECTS AND SUMMARY OF THE INVENTION
It is an object of the present invention to provide a compact and portable wireless computer substation, which can access and utilize the hardware and software resources of a computer workstation from a remote location.
It is another object of the present invention to provide a wireless computer substation, which is capable of viewing the activities transpiring at a workstation from a remote location.
It is a further object of the present invention to provide a wireless monitor and a wireless keyboard, each of which is portable and capable of communicating with a workstation from a remote location, wherein the keyboard sends commands to the workstation and the monitor displays activities which transpire at the workstation. It is still a further object of the present invention to provide a method for distributing the computational power of a computer workstation to remote sites in a cost-effective and readily accessible manner.
It is yet another object of the present invention to provide a method for monitoring the content, operation, performance, and activities of a computer or workstation from a remote location.
In accordance with one embodiment of the present invention, a wireless computer substation is provided, which communicates with a computer workstation. The wireless computer substation of the present invention may be implemented in various forms including, but not limited to, an electronic tablet, a pen-based computer, a Palm-Pilot™, a wireless monitor and keyboard, and other similar devices.
One of the advantages of the preferred embodiment of the present invention is that any required computational ability, such as that provided by a microprocessor, is situated remotely from the wireless computer substation. Thus, the wireless computer substation need only include a display and preferably a keyboard. The wireless computer substation may include a relatively small processing circuit to handle the minor tasks of processing the data entered on the keyboard or received by the transceiver, or placing the data in the proper format for being displayed, but any major processing function are performed outside the wireless computer substation and remotely thereto by the microprocessor or central processing unit of the workstation.
The first embodiment of the wireless computer substation includes a wireless transceiver, a minor processing circuit linked to the wireless transceiver, a display device linked to the minor processing circuit, a keyboard linked to the minor processing circuit, and a manual entry device linked to the minor processing circuit. The minor processing circuit may include at least one of a microprocessor, a microcontroller, an application specific integrated circuit (ASIC), a programmable logic device, a discrete logic device, and a gate array. The first embodiment of the computer workstation includes a wireless transceiver for communicating with the wireless transceiver of the wireless computer substation, a microprocessor or microcontroller linked to the wireless transceiver of the computer workstation, a display device linked to the microprocessor, a keyboard linked to the microprocessor, a manual entry device linked to the microprocessor, and one or more peripheral devices linked to the microprocessor.
The microprocessor of the workstation is preferably capable of accepting and interpreting a signal directly from the wireless transceiver of the workstation such that the microprocessor can control the operation of the circuits connected thereto, although additional circuitry external to the microprocessor may be added for this purpose. It is anticipated that the first embodiment of the workstation will be provided to the consumer with the capability of communicating with the wireless computer substation of the present invention.
During use, the operator of the wireless computer substation enters commands through either the keyboard or another manual entry device, such as a mouse. These commands, which are digital signals, are then routed to the minor processing circuit within the substation. The minor processing circuit then interprets and translates these signals to be compatible with the wireless transceiver of the substation. The transceiver accepts and converts the signals from the minor processing circuit into a wireless signal, which is transmitted to the wireless transceiver of the computer workstation.
Upon receipt of the wireless signal from the wireless transceiver of the substation, the transceiver converts the wireless signal to a digital signal, which is routed to the microprocessor of the workstation. The microprocessor then interprets the digital signal and performs the appropriate task preferably as if the command had originated from the workstation. For instance, the computer workstation may transmit the command to a peripheral device, such as a modem or printer. The peripheral device would then perform the appropriate task and may relay a digital signal back to the microprocessor. In the first embodiment of the workstation, the relayed digital signal is routed back to the wireless transceiver of the workstation. The workstation transceiver then converts the digital signal into a wireless signal, which is transmitted to the wireless transceiver of the substation. The wireless transceiver of the substation then converts the wireless signal to a digital signal, which is routed to the minor processing circuit of the substation. The substation minor processing circuit then interprets the digital signal and sends the appropriate commands to the display device of the substation, which displays the corresponding information.
The second embodiment of the computer workstation includes a wireless transceiver for communicating with the wireless transceiver of the computer substation, a minor processing circuit linked to the wireless transceiver of the computer workstation, a microprocessor linked to the minor processing circuit of the computer workstation, a display device linked to the microprocessor, a keyboard linked to the microprocessor, a manual entry device linked to the microprocessor, and one or more peripheral devices linked to the microprocessor. In this embodiment, the transceiver and minor processing circuit of the workstation are add-on devices within a communication interface unit, which communicates with the microprocessor of the existing workstation through a parallel or serial port.
The add-on minor processing circuit preferably accepts the digital signal from the add-on wireless transceiver and converts that digital signal into a command format that the unmodified microprocessor of the workstation can recognize. It is anticipated that the second embodiment of the workstation will be provided to the consumer as a means for retrofitting existing computer workstations to be compatible with the wireless computer substation of the present invention.
The unmodified microprocessor then processes the commands preferably as if they originated from the workstation, which may include sending those commands to a peripheral device, such as a modem or printer. The peripheral device would then perform the command and return the appropriate information in the form of a digital signal back to the microprocessor. The microprocessor then relays that digital signal back to the add-on communication interface unit, which translates it into a format that is recognizable by the add-on wireless transceiver.
The add-on transceiver then converts the digital signal into a wireless signal and transmits that wireless signal to the wireless transceiver of the substation. The wireless transceiver of the substation then converts the received wireless signal to a digital signal and routes it to the minor processing circuit in the substation. The substation minor processing circuit then converts the digital signal to an appropriate format, such as a video signal, which is routed to and displayed by the display device of the substation.
The second embodiment of the wireless computer substation comprises a separate wireless display device and a separate wireless manual entry device. The wireless manual entry device is linked to a wireless transmitter. The wireless display device is linked to a wireless receiver.
During use, the operator of the wireless computer substation enters commands through either the wireless keyboard or manual entry device. These commands, which are digital signals, are then routed to the minor processing circuit within the wireless manual entry device. The minor processing circuit then routes the digital signals to the wireless transmitter of the wireless manual entry device, which accepts and converts the digital signals into a wireless signal. The wireless signal is then transmitted to the wireless transceiver of the computer workstation described above.
As described above, the computer workstation is provided with a wireless transceiver, which accepts the wireless signal from the transmitter of the wireless manual entry device and converts the wireless signal into a digital signal, which is routed to the microprocessor of the workstation. The microprocessor then interprets the digital signal and sends the appropriate command to the appropriate circuit connected to the microprocessor, which may be a peripheral device, such as a modem or printer. The peripheral device then performs the command and relays a digital signal back to the microprocessor. The relayed digital signal is then routed back to the wireless transceiver of the workstation. The workstation transceiver then converts the digital signal into a wireless signal, which is transmitted to the wireless receiver of the wireless display device. The wireless signal is then translated into an appropriate format and displayed by the display device.
Additionally, instead of sending commands to the workstation, the substation of the present invention can be utilized to view the activities transpiring at the workstation. For example, a parent, from a remote location within her home, can view the activities of her children at the family computer without their knowledge.
Further, with the multitasking capabilities and processing power of today's computers, the operator of the substation can advantageously utilize the hardware and software resources of the computer workstation without interrupting the operator located at the workstation. This will enable, for example, a child to access the Internet or play games while a parent accesses programs to balance his checkbook, type a letter, or separately access the Internet to download a newspaper or other information.
These and other objects, features, and advantages of the present invention will become apparent from the following detailed description of illustrative embodiments thereof, which is to be read in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a pictorial illustration of one embodiment of a communication link between a wireless computer substation and a computer workstation formed in accordance with the present invention.
Figure 2 is a block diagram of electronic circuitry for a first embodiment of the wireless computer substation formed in accordance with the present invention.
Figure 3 is a block diagram of electronic circuitry for a first embodiment of the computer workstation formed in accordance with the present invention. Figure 4 is a pictorial illustration of a second embodiment of a communication link between the wireless substation and the computer workstation formed in accordance with the present invention.
Figure 5 is a block diagram of the electronic circuitry for a second embodiment of the computer workstation formed in accordance with the present invention.
Figure 6 is a pictorial illustration of a communication link between a second embodiment of the wireless substation and the computer workstation formed in accordance with the present invention.
Figure 7 is a block diagram of the electronic circuitry for the second embodiment of the computer substation formed in accordance with the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawings, Figures 1 through 3 show one embodiment of the wireless computer substation, generally referred to as 1 , and the computer workstation, generally referred to as 2, of the present invention. As shown in Figure 2, the wireless computer substation 1 includes a wireless transceiver 3, a minor processing circuit 4 linked to the wireless transceiver 3, a display device 5 linked to the minor processing circuit 4, a keyboard 6 linked to the minor processing circuit 4, and a manual entry device 7 linked to the minor processing circuit 4.
One of the advantages of the preferred embodiment of the present invention is that any required computational ability, such as that provided by a microprocessor, is situated remotely from the wireless computer substation. Thus, the wireless computer substation need only include a display and preferably a keyboard. The wireless computer substation may include a relatively small processing circuit to handle the minor tasks of processing the data entered on the keyboard or received by the transceiver, or placing the data in the proper format for being displayed, but any major processing function are performed outside the wireless computer substation and remotely thereto by the microprocessor or central processing unit of the workstation.
The operator of the wireless computer substation 1 enters commands through either the keyboard 6 or the manual entry device 7, such as a mouse, trackball, or touch pad. This entry of commands is performed in the same manner as entry of commands at a hardwired keyboard or mouse. The entered commands are then preferably routed through the appropriate decoder or controller (9, 10) for conversion of the command to a digital signal. For example, if the operator entered a command through the keyboard 6, this command would then be sent to a keyboard decoder 9, which would convert the command to a digital signal.
The digital signal output by the appropriate decoder or controller (9, 10) is then routed to the minor processing circuit 4 within the computer substation 1. The minor processing circuit 4 then routes the digital signal to the wireless transceiver 3. The minor processing circuit 4 used within the computer substation 1 may include a microprocessor, a microcontroller, an application specific integrated circuit (ASIC), a programmable logic device, a discrete logic device, and a gate array. The choice of device will be based upon the desired capabilities of the computer substation, the cost requirements, and the ease of integration with the remaining components of the substation, to name a few. It is to be understood that the decoders, controllers, and minor processing circuit (8, 9, 10, 4) are optional and that the functions performed thereby may be carried out by the remaining components in the substation 1.
The first wireless transceiver 3 then converts the digital signal to a wireless signal, which is capable of being transmitted to and understood by a second wireless transceiver 11 of the computer workstation 2, as shown in Figure 3. The wireless transceivers 3 and 11 can be any type of transceivers that are capable of converting a digital signal to a wireless signal, and then transmitting and receiving wireless transmissions to and from other compatible transceivers. For example, the transceivers 3 and 11 can be infrared (IR) transceivers, radio frequency (RF) transceivers, microwave transceivers, or a combinations of two or more of these. It will be evident to one skilled in the art that the wireless transceiver preferably includes the appropriate components required to convert the digital signal to an appropriate wireless signal. These components include active and passive devices, such as transistors, resistors, capacitors, filters, modulators, diodes (for IR transmission), and antennas (for RF transmission) to name a few.
As shown in Figure 3, the first embodiment of the computer workstation 2 includes the second wireless transceiver 11 , which communicates with the first wireless transceiver 3 of the computer substation 1, and thus accepts the incoming wireless signal. The second wireless transceiver 1 1 then converts the wireless signal to a digital signal and routes the digital signal to a microprocessor 12 such that the microprocessor 12 can control the operation of the circuits connected thereto.
In this first embodiment, the microprocessor 12 of the workstation 2 is preferably capable of accepting a digital signal directly from the second wireless transceiver 11. As is known, the microprocessor is typically implemented with memory devices broadly categorized as random access memory (RAM) and read only memory (ROM). The CPU uses the ROM for permanent storage of constants and operational software, and uses the RAM for temporary storage of variables.
The digital signal output by the microprocessor 12 is then routed to an appropriate device controller (13, 16, 17) which interprets the digital signal and converts it into a command recognizable by the appropriate peripheral device (18, 21, 22), such as a display, modem, or printer. The peripheral device then performs the command and may relay the information back to the appropriate device controller (16, 17). The device controller (16, 17) then converts the information into an appropriate digital signal, which is routed to the microprocessor 12 of the workstation.
With the microprocessor 12 of the first embodiment, the digital signal from the device controller (16, 17) is then routed back to the second wireless transceiver 11 of the workstation. The second wireless transceiver 11 then converts the digital signal to a wireless signal and transmits the wireless signal to the first wireless transceiver 3 of the substation 1.
The first wireless transceiver 3 of the substation then converts the wireless signal to a digital signal, which is routed to the minor processing circuit 4 of the substation 1. The minor processing circuit 4 then sends the digital signal to, for example, a display controller 8, which converts the digital signal to a command recognizable by the display device 5 of the substation 1. The display device 5 then displays the information that corresponds to the received command.
The operation of the wireless computer substation 1 essentially includes entering a command through a manual entry device 7, such as a keyboard 6 or mouse. This command is then converted to a digital signal within the substation by an appropriate device controller. The digital signal is then routed to a minor processing circuit 4, which, in turn, routes the signal to the first wireless transceiver 3. The first wireless transceiver 3 then converts the digital signal to a wireless signal and transmits that wireless signal to the second wireless transceiver 11 of the computer workstation 2.
The second wireless transceiver 1 1 of the workstation 2 then converts the wireless signal to a digital signal, which is sent to the workstation microprocessor 12. The workstation microprocessor 12 then routes the digital signal to the intended peripheral device controller (13-17), which converts the digital signal into a command recognizable by the attached peripheral device (18-22). The peripheral device (18-22) then performs the task corresponding to the transmitted command and may return information.
This information is then sent back to the device controller (13-17) and converted into a returning digital signal. The returning digital signal is then routed to the microprocessor 12 of the workstation 2 and sent to the second wireless transceiver 11. The second wireless transceiver 11 then converts the digital signal to a wireless signal and transmits the returning wireless signal to the first wireless transceiver 3 of the substation 1.
The returning wireless signal is then converted by the first wireless transceiver 3 to a returning digital signal, which is sent to the minor processing circuit 4. The minor processing circuit 4 then routes the returning digital signal to the appropriate device controller (8-10), such as a display controller 8. The display controller 8 then converts the digital signal to a command recognizable by the display device 5, such as a monitor. The display device 5 then displays the information requested by the incoming command for the operator of the substation to view, thus completing the operation process. This transmitting, gathering, and relaying of commands from the substation to the workstation will continue until the operator of the substation wishes to no longer access the computer workstation 2.
Figures 4 and 5 show a second embodiment of the computer workstation, generally referred to as 50, for use with the substation 1 of the present invention. The substation 1 for use with the second embodiment of the computer workstation 50 is essentially identical to that of the substation described above. Therefore, the structure of the substation is incorporated into this embodiment and need not be discussed in detail.
As shown in Figures 4 and 5, the second embodiment of the computer workstation 50 shows the second wireless transceiver 51 and the minor processing circuit 52 as add-on units, generally referred to as a communication interface unit 70. In this embodiment, the transceiver 51 and minor processing circuit 52 of the workstation communicate with an unmodified microprocessor 55 of an existing workstation 50 through a parallel or serial port.
The second wireless transceiver 51 of the add-on unit 70 receives the incoming wireless signal from the substation first wireless transceiver 3. The received wireless signal is then converted to a digital signal and routed to the minor processing circuit 52. The digital signal is then routed, via a serial or parallel connection, to the unmodified microprocessor 55 of the existing computer workstation 50.
The microprocessor 55 then routes the digital signal to the appropriate device controller (56, 59, 60) which, in turn, converts the digital signal to a command recognizable by the peripheral device (61, 64, 65), such as a display 61, modem, or printer. The peripheral device (61, 64, 65) then performs the commands sent to it. In the same manner as described above, the peripheral device may return the information via the device controller (56, 59, 60), the unmodified microprocessor 55, the minor processing circuit 52, and the second wireless transceiver 51 back to the substation 1 for display on the display device 5 of the substation 1.
One advantage of the second embodiment is that existing computer workstations may be retrofitted with an add-on unit. The add-on unit enables the wireless computer substation 1 to be used without the need for modifying the existing workstation.
Figures 6 and 7 show a second embodiment of the wireless computer substation for use with either embodiment of the computer workstation described above. The second embodiment of the wireless computer substation includes a separate wireless display device 100 and a separate wireless manual entry device 120. As shown in Figure 7, the wireless manual entry device 120 includes a wireless transmitter 124, a minor processing circuit 123 linked to the wireless transmitter 124, a keyboard 121 linked to the minor processing circuit 123, and a manual entry device linked to the minor processing circuit 123. The wireless display device 100 includes a wireless receiver 103 and a display 101 linked to the wireless receiver 103 through a display controller/minor processing circuit 102. It is to be understood that the decoders, controllers, and minor processing circuit (102, 122, 126, 123) are optional and that the functions performed thereby may be carried out by the remaining components in the substation 1.
During use, the operator of the wireless manual entry device 120 enters commands through either the wireless keyboard 121 or the manual entry device 125. This entry of commands is performed in the same manner as entry of commands via a hardwired keyboard or mouse. The entered commands are then routed through the appropriate decoder or controller (122, 126) for conversion of the command to a digital signal. For example, if the operator entered a command on the keyboard 121, this command would then be sent to a keyboard decoder/controller 122 which, in turn, would convert the command into a format suitable for the minor processing circuit 123.
The digital signal output by the appropriate decoder or controller (122, 126) is then routed to the minor processing circuit 123 within the wireless manual entry device 120. The minor processing circuit 123 then routes the digital signal to the wireless transmitter 124.
The wireless transmitter 124 then converts the digital signal to a wireless signal, which is capable of being transmitted to and understood by the wireless transceiver 1 1 in the computer workstation. The wireless transmitter 124 can be any type of transmitter which is capable of converting a digital signal to a wireless signal, and then sending wireless transmissions to other compatible transceivers. For example, the transmitter 124 can be infrared (IR), radio frequency (RF), microwave, or a combinations of two or more of these. In addition, the wireless signal can be transmitted as an analog signal or a digital signal while remaining within the scope of the present invention.
As described above, the computer workstation is provided with a wireless transceiver, which accepts the wireless signal from the transmitter 124 of the keyboard/manual entry device and converts the wireless signal to a digital signal, which is routed to the microprocessor of the workstation. The microprocessor then interprets the digital signal and may send the appropriate command to the intended peripheral connected to the microprocessor. The peripheral device performs the commands and may relay a digital signal back to the microprocessor. The relayed digital signal is then routed back to the wireless transceiver of the workstation. The workstation transceiver then converts the digital signal into a wireless signal, which is transmitted to the wireless receiver 103 of the wireless display device 100. The wireless signal is then routed to the display controller 102, interpreted into the appropriate commands, and displayed by the display device 101.
Additionally, rather than sending commands to the workstation, the computer substation of the present invention can be utilized to view the activities transpiring at the workstation. For example, a parent, from a remote location within her home, may view the activities of her child at the family computer without that child's knowledge. This is accomplished by having the same information that is output to the display device of the workstation also routed to the substation display device.
Further, with the multitasking capabilities and processing power of today's computers, the operator of the substation can utilize the hardware and software resources of the computer workstation without the need to interrupt the operator positioned at the workstation. This will enable, for example, a child to access the Internet or play games while a parent accesses programs to balance his checkbook, type a letter, or separately access the Internet to download a newspaper or other information.
Additionally, the wireless computer substation of the present invention can be embodied in various forms including, but not limited to, an electronic tablet, a pen- based computer, a Palm-Pilot™, and other similar devices.
Further, it is anticipated that the wireless signals described above may be made compatible with various specifications, such as Bluetooth™ and the 900 MHz spread spectrum technology. Bluetooth™ refers to a technology specification for small form factor, low-cost, short-range radio links between mobile personal computers, mobile phones, and other portable devices. When two Bluetooth™-equipped devices come within a 10-meter range of each other, they can establish a link. Since Bluetooth™ utilizes a radio-based link, it doesn't require a line-of-sight connection in order to communicate. Information can be sent from a laptop to a printer in the next room, or a microwave oven can send a message to a mobile phone telling you that your meal is ready.
It is anticipated that Bluetooth™ will allow for the replacement of many propriety cables that currently connect one device to another with one universal radio link. Its essential features are robustness, low complexity, low power, and low cost. Designed to operate in noisy frequency environments, a Bluetooth™ transceiver uses a fast acknowledgement and frequency hopping scheme to make the link robust. Bluetooth™ modules operate in an unlicensed band at 2.4 GHz, and avoid interference from other signals by hopping to a new frequency after transmitting or receiving a packet. Compared with other systems in the same frequency band, a Bluetooth™ module hops faster and uses shorter packets.
Spread spectrum is an advanced form of data transmission, which provides increased security, clarity, and range. The primary difference between conventional fixed-frequency transmission and spread spectrum transmission is multi-channel operation. A fixed frequency transmission device is designed to use only one channel (or radio frequency) at a time. Such devices will not switch to a new channel unless they encounter interference or the user manually changes the channel.
In contrast, spread spectrum technology uses multiple frequencies or channels. This process is completely transparent to the user. The benefits of spread spectrum transmission are due to this multi-channel format. A spread spectrum device spreads the signal across virtually the entire 900 MHz bandwidth (between 902 & 928 MHz). This process ensures that the transmission is secure, because only the transmitter and receiver know the pre-assigned spreading code, preventing someone from locking on and eavesdropping on the transmission.
Spreading the transmitted signal over a very large bandwidth also provides improved clarity, as this technology circumvents traditional sources of interference. The third major benefit of spread spectrum technology is increased range. The Federal Communications Commission (FCC) allows spread spectrum transmission at a higher power level than conventional, fixed-frequency transmission. The justification for increased power levels is a direct result of the multi-channel format. By allowing spread spectrum to transmit at a higher power level, the potential exists for operating receivers and transmitters at a greater distance from each other than would normally be possible with fixed-frequency transmission.
From the foregoing description, it will be appreciated that the apparatus formed in accordance with the present invention provides a compact and portable wireless computer substation, which can access and utilize the hardware and software resources of a computer workstation, and view the activities transpiring at the workstation from a remote location. From the foregoing description, it will also be appreciated that the method in accordance with the present invention distributes the computational power of a workstation to remote sites in a cost-effective and readily accessible manner, and enables the content, operation, performance, and activities of the workstation to be monitored from a remote location.
Although illustrative embodiments of the present invention have been described herein with reference to the accompanying drawings, it is to be understood that the invention is not limited to those precise embodiments, and that various other changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the invention

Claims

WHAT IS CLAIMED IS:
1. A wireless computer substation capable of communicating with a computer workstation, which comprises:
a manual entry device;
a display, the display being responsive to signals generated by at least one of the computer workstation and the manual entry device; and
a wireless transceiver, the wireless transceiver being responsive to signals generated by the computer workstation, the wireless transceiver being capable of at least one of receiving a wireless signal from the computer workstation and transmitting the wireless signal to the computer workstation, the wireless signal being representative of at least one of information to be displayed on the display and information entered on the manual entry device, thereby enabling the wireless computer substation to communicate with the computer workstation.
2. A wireless computer substation capable of communicating with a computer workstation as defined by Claim 1 , wherein the manual entry device includes at least one of a keyboard, a mouse, a touch pad, and a trackball.
3. A wireless computer substation capable of communicating with a computer workstation as defined by Claim 1 , further including a minor processing circuit, the minor processing circuit being coupled to the display, the manual entry device, and the wireless transceiver.
4. A wireless computer substation capable of communicating with a computer workstation as defined by Claim 3, wherein the minor processing circuit includes at least one of a microprocessor, a microcontroller, an application specific integrated circuit (ASIC), a programmable logic device, a discrete logic device, and a gate array.
5. A wireless computer substation capable of communicating with a computer workstation as defined by Claim 1 , wherein the wireless signal is compatible with at least one of a Bluetooth™ technology specification and a 900 Mhz spread spectrum specification.
6. A wireless computer substation capable of communicating with a computer workstation as defined by Claim 1 , wherein the wireless signal includes at least one of a radio frequency signal, a microwave signal, and an infrared signal.
7. A communication interface unit, the communication interface unit being capable of providing a communication link between a wireless computer substation and a computer workstation, which comprises:
an interface circuit; and
a wireless transceiver, the wireless transceiver being coupled to the interface circuit, the wireless transceiver being capable of at least one of receiving a wireless signal from the wireless computer substation and transmitting the wireless signal to the wireless computer substation, the wireless signal being representative of at least one of information to be displayed on the wireless computer substation and information entered on the wireless computer substation, the wireless transceiver being capable of at least one of receiving a wired signal from the computer workstation and transmitting the wired signal to the computer workstation, the wired signal being representative of at least one of information to be displayed on the computer workstation and information entered into the computer workstation, the wired signal being representative of the wireless signal, thereby providing a communication link between the wireless computer substation and the computer workstation.
8. A communication interface unit, the communication interface unit being capable of providing a communication link between a wireless computer substation and a computer workstation as defined by Claim 7, wherein the interface circuit includes at least one of a microprocessor, a microcontroller, an application specific integrated circuit (ASIC), a programmable logic device, a discrete logic device, and a gate array.
9. A communication interface unit, the communication interface unit being capable of providing a communication link between a wireless computer substation and a computer workstation as defined by Claim 7, wherein the wireless signal is compatible with at least one of a Bluetooth™ technology specification and a 900 Mhz spread spectrum specification.
10. A communication interface unit, the communication interface unit being capable of providing a communication link between a wireless computer substation and a computer workstation as defined by Claim 7, wherein the wireless signal includes at least one of a radio frequency signal, a microwave signal, and an infrared signal.
11. A wireless display, the wireless display being capable of communicating with a computer workstation, which comprises:
a display, the display being responsive to signals generated by the computer workstation; and
a wireless receiver, the wireless receiver being responsive to signals generated by the computer workstation, the wireless receiver being capable of receiving a wireless signal from the computer workstation, the wireless signal being representative of information to be displayed on the display, thereby enabling the wireless display to communicate with the computer workstation.
12. A wireless display capable of communicating with a computer workstation as defined by Claim 11, further including a minor processing circuit, the minor processing circuit being coupled to the display and the wireless receiver.
13. A wireless display capable of communicating with a computer workstation as defined by Claim 12, wherein the minor processing circuit includes at least one of a microprocessor, a microcontroller, an application specific integrated circuit (ASIC), a programmable logic device, a discrete logic device, and a gate array.
14. A wireless display capable of communicating with a computer workstation as defined by Claim 11 , wherein the wireless signal is compatible with at least one of a Bluetooth™ technology specification and a 900 Mhz spread spectrum specification.
15. A wireless display capable of communicating with a computer workstation as defined by Claim 11 , wherein the wireless signal includes at least one of a radio frequency signal, a microwave signal, and an infrared signal.
16. A method of providing remote access to a computer workstation, comprising the steps of:
electronically coupling together a display, a manual entry device, and a wireless transceiver;
receiving a first wireless signal from the computer workstation, the wireless transceiver receiving the first wireless signal, the first wireless signal being representative of information to be displayed on the display; and
transmitting a second wireless signal to the computer workstation, the second wireless signal being representative of information entered on the manual entry device, thereby enabling the wireless computer substation to communicate with the computer workstation.
17. A method of providing remote access to a computer workstation as defined in Claim 16, further including the step of:
formatting the second wireless signal to be compatible with at least one of a Bluetooth™ technology specification and a 900 Mhz spread spectrum specification.
18. A method of providing remote access to a computer workstation as defined in Claim 16, wherein the step of transmitting the second wireless signal includes the step of converting the second wireless signal to at least one of a radio frequency signal, a microwave signal, and an infrared signal.
19. A method of providing a communication link between a wireless computer substation and a computer workstation, comprising the steps of:
electronically coupling a wireless transceiver to the computer workstation;
receiving a first wired signal from the computer workstation, the wireless transceiver receiving the first wired signal, the first wired signal being representative of information to be displayed on the wireless computer substation;
transmitting a first wireless signal to the wireless computer substation, the wireless transceiver transmitting the first wireless signal, the first wireless signal being representative of the first wired signal;
receiving a second wireless signal from the wireless computer substation, the second wireless signal being received by the wireless transceiver, the second wireless signal being representative of information entered on the wireless computer substation;
and
transmitting a second wired signal to the computer workstation, the second wired signal being representative of the second wireless signal, thereby providing a communication link between the wireless computer substation and the computer workstation.
20. A method of providing a communication link between a wireless computer substation and a computer workstation as defined in Claim 19, further including the step of: formatting the first wireless signal to be compatible with at least one of a Bluetooth™ technology specification and a 900 Mhz spread spectrum specification.
21. A method of providing a communication link between a wireless computer substation and a computer workstation as defined in Claim 19, wherein the step of transmitting the first wireless signal includes the step of converting the first wireless signal to at least one of a radio frequency signal, a microwave signal, and an infrared signal.
PCT/US2000/032294 1999-11-22 2000-11-22 Method and apparatus for providing remote, wireless access to a computer workstation WO2001039527A1 (en)

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US5553312A (en) * 1994-06-20 1996-09-03 Acs Wireless, Inc. Data transfer and communication network
US5913034A (en) * 1996-08-27 1999-06-15 Compaq Computer Corp. Administrator station for a computer system

Patent Citations (2)

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US5553312A (en) * 1994-06-20 1996-09-03 Acs Wireless, Inc. Data transfer and communication network
US5913034A (en) * 1996-08-27 1999-06-15 Compaq Computer Corp. Administrator station for a computer system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2376115A (en) * 2001-05-29 2002-12-04 Alien Dog Star Invest Ltd Indicator driven by wireless link from computer
GB2376115B (en) * 2001-05-29 2003-04-16 Alien Dog Star Invest Ltd Indicator driven by wireless link to computer
GB2425857A (en) * 2005-05-03 2006-11-08 John Richard Tilsley-Baker Wireless controller for a computer

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