VIRTUAL DYNAMIC CELLULAR INFRASTRUCTURE BASED ON COORDINATE INFORMATION

• US 20040203342A1
• Filed: 07/22/2002
• Published: 10/14/2004
• Est. Priority Date: 07/22/2002
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Napoles, Adrian, Sibecas, Salvador, Eaton, Eric Thomas
• Granted Patent: US 6,839,542 B2
• Time in Patent Office: Days
• US Class Current: 455/11.1
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04W 40/20 based on geographic position or location
• CPC Class Codes: H04W 40/246 Connectivity information discovery
• CPC Class Codes: H04W 40/30 for proactive routing
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

A wireless communication system (100) having portable communication devices (102, 104, and 106) capable of establishing direct terminal (102)-to-terminal (104) communication (108 and 110) and indirect terminal (102)-to-terminal (104) communication (112, 118 and 114, 116) through another terminal (106) without having a fixed base station. A portable communication device (106) used as a terminal is capable functioning as a router for communication (112, 118 and 114, 116) between other portable devices (102 and 104) in the system. While functioning as a router, the portable device (106) is capable establishing and maintaining a separate direct communication (302 and 304) with another portable communication device (306). A wireless communication system(600) utilizing predetermined cell- and location-specific communication parameters (808) and non-repeating propagation patterns (1200) for portables communication devices in the system for establishing communications.

Claims

1. A wireless communication system comprising:

first, second and third portable communication devices operating in synchronization, each portable communication device having a transceiver for communication at a particular frequency band,

wherein the first portable communication device is capable of establishing a first direct portable-to-portable communication with the second portable communication device and is capable of establishing a first indirect communication with the second portable communication device through the third portable communication device by using the third portable communication device as a first router.

2. The wireless communication system according to claim 1 further comprising a fourth portable communication device having a transceiver for communication at a particular frequency band and operating in synchronization with the first, second, and third portable communication devices wherein the first portable communication device is capable of establishing a second indirect communication with the second portable communication device through the third and the fourth portable communication devices by using the fourth portable communication devices as a second router between the third and the second portable communication devices.

3. The wireless communication system according to claim 1 further comprising a fourth portable communication device having a transceiver for communication at a particular frequency band and operating in synchronization with the first, second, and third portable communication devices wherein the third portable communication device is capable of establishing a second direct portable-to-portable communication with the fourth portable communication device while the third portable communication device is being used as the first router for the first indirect communication between the first and the second portable communication devices.

4. The wireless communication system according to claim 1 wherein each transceiver uses a multiple-slot modulation scheme.

5. The wireless communication system according to claim 1 wherein each transceiver uses a particular frequency band that is used for both transmitting and receiving signals.

6. The wireless communication system according to claim 1 further comprising a base station wherein the base station is connected to a wire communication system and is capable of transmitting signals to the first, second, and third portable communication devices for communicating information received from the wire communication system.

7. The wireless communication system according to claim 6 wherein the base station further comprises a transceiver capable of communicating with the first, second, and third portable communication devices at a particular frequency band.

8. A method for a first portable communication device of a plurality of portable communication devices located at a first location in a wireless communication system to establish communication with a second portable communication device of the plurality of portable communication devices located at a second location, each of the plurality of portable communication devices having a positioning system receiver receiving current location information from a positioning system and having a transceiver for communication at a particular frequency band, the method comprising steps of:

transmitting a first message to the second portable communication device;

if the second portable communication device has received the first message, receiving a first acknowledgment from the second portable communication device;

otherwise, searching for a third portable communication device of the plurality of portable communication devices;

if the third portable communication device is unavailable, indicating the second portable communication device is unreachable;

otherwise, instructing the third portable communication device to function as a first router;

transmitting the first message to the third portable communication device;

instructing the third portable communication device re-transmit the first message as a first repeat message to the second portable communication device; and

,

determining if the second portable communication device has received the first repeat message.

9. The method according to claim 8, wherein the step of determining if the second portable communication device has received the first message further comprises a step of receiving an acknowledgement of the message reception from the second portable communication device.

10. The method according to claim 9, wherein the acknowledgement comprises a time of reception, a location of the second portable communication device, and a message path.

11. The method according to claim 8, wherein the step of transmitting the first message to the second portable communication device further comprises a step of using a first appropriate path if the second location is known by the first portable communication device.

12. The method according to claim 8 wherein the wireless communication system has a plurality of cells assigned geographically, each of the plurality of cells having a predetermined geographical area and a predetermined set of communication parameters.

13. The method according to claim 12 further comprising steps of:

determining a first cell in which the first portable electronic communication device based upon the first location wherein the first cell has a first geographical area and a first set of communication parameters; and

configuring a first transceiver of the first portable communication device compatible with the first set of communication parameters.

14. The method according to claim 13, wherein the step of transmitting the first message to the second portable communication device further comprises a step of transmitting the first message having an identification of the second portable communication device using the first set of communication parameters.

15. The method according to claim 14 wherein the step of searching for the third portable communication device is limited within the first cell.

16. The method according to claim 15 wherein the step of determining if the second portable communication device has received the first repeat message further comprises steps of:

if the second portable communication device has received the first repeat message, receiving a second acknowledgement from the second portable communication device through the third portable communication device; and

,

otherwise, instructing the third portable communication device to search for a fourth portable communication device of the plurality of portable communication devices located in a second cell adjacent to the first cell.

17. The method according to claim 16 wherein the step of instructing the third portable communication device to search for the fourth portable communication device further comprises steps of:

determining if the fourth portable communication device is available;

if the fourth portable communication device is unavailable, indicating the second portable communication device is unreachable;

otherwise, configuring the fourth portable communication device as a second router;

instructing the fourth portable communication device re-transmit the first repeat message as a second repeat message to the second portable communication device; and

,

determining if the second portable communication device has received the second repeat message.

18. The method according to claim 17 wherein the step of determining if the second portable communication device has received the second repeat message further comprises steps of:

if the second portable communication device has received the second repeat message, receiving a third acknowledgement from the second portable communication device through the fourth portable communication device then through the third portable communication; and

,

otherwise, indicating the second portable communication device is unreachable.

19. A method for a first portable communication device of a plurality of portable communication devices located at a first location in a first cell of a plurality of cells to establish communication with a second portable communication device of the plurality of portable communication devices located at a second location in a second cell wherein each of the plurality of portable communication devices having a positioning system receiver receiving location information from a positioning system and having a transceiver for communication at a particular frequency band, wherein each of the plurality of cells is assigned to a predetermined geographical area, has a boundary defining the geographical area, has a central region around a center, a second region surrounding the center region and an outer region surrounding the second region within the boundary, and is divided into six sectors wherein each sector is adjacent to a different cell, the method comprising steps of:

acquiring a third portable communication device of the plurality of portable communication devices located within a first central region of the first cell;

instructing the third portable communication device to acquire a first set of up to three portable communication devices of the plurality of portable communication devices wherein each of the first set of up to three portable communication devices is located in a different sector of the first cell from each other;

acquiring a second set of up to three portable communication devices of the plurality of portable communication devices located in a first outer region of the first cell wherein each of the second set of up to three portable communication devices is located in a different sector of the first cell from each other and from the first set of up to three portable communication devices;

transmitting a first message targeted for the second portable communication device along with an out-of-cell broadcast request to the third portable communication device and to the second set of up to three portable communication devices located in the first outer region;

instructing the third portable communication device to re-transmit the first message targeted for the second portable communication device along with the out-of-cell broadcast request to the first set of up to three portable communication devices located in the first outer region;

instructing the first and second sets of up to three portable communication devices upon reception of the out-of-cell broadcast request to re-transmit the first message to cells adjacent to each of the first and second sets of up to three portable communication devices; and

determining if the second portable communication device has received the first message.

20. The method according to claim 19 wherein the step of instructing the first and second sets of up to three portable communication devices to re-transmit the first message further comprises a step of using a predetermined non-repeating propagation pattern.

21. The method according to claim 19 wherein the step of instructing the first and second sets of up to three portable communication devices to re-transmit the first message further comprises using an appropriate propagation pattern if the location of the second portable communication device is known.

22. The method according to claim 19 wherein the step of determining if the second portable communication device has received the first message further comprises a step of receiving a first acknowledgement sent by the second portable device through one of portable communication devices of the first and second sets of portable communication devices if the second portable communication device has received the first message.

23. The method according to claim 22, wherein the first acknowledgement comprises a time of reception, a location of the second portable communication device, and a message path.

24. A method for a first portable communication device of a plurality of portable communication devices located at a first location in a first cell of a plurality of cells for establishing communication with a second portable communication device of the plurality of portable communication devices located at a second location in a second cell, the method comprising steps of:

determining whether a message originated by the first portable communication device exceeds a predetermined length;

if the message exceed the predetermined length, determining whether the second portable communication device is reachable before sending the message to the second portable communication device; and

if the second portable communication device is determined to be reachable, transmitting the message using an appropriate propagation path.

25. The method according to claim 24 wherein the step of determining whether the second portable communication device is reachable further comprises a step of transmitting a locator message using a predetermined non-repeating propagation pattern.

26. The method according to claim 24 wherein the step of determining whether the second portable communication device is reachable further comprises a step of transmitting a locator message using a dynamic cell coordinate based propagation pattern referenced to the first cell.

27. The method according to claim 24 wherein each of the plurality of portable communication devices having a positioning system receiver receiving location information from a positioning system and having a transceiver for communication at a particular frequency band, wherein each of the plurality of cells is assigned to a predetermined geographical area, has a boundary defining the geographical area, has a central region around a center, a second region surrounding the center region and an outer region surrounding the second region within the boundary, and is divided into six sectors wherein each sector is adjacent to a different cell, the method further comprising steps of:

acquiring a third portable communication device of the plurality of portable communication devices located within a first central region of the first cell;

instructing the third portable communication device to acquire a first set of six portable communication devices of the plurality of portable communication devices wherein each of the six portable communication devices is located in a different sector of the outer region of the first cell from each other;

instructing the first set of six portable communication devices to transmit the message to a second set of six portable communication device of the plurality of portable communication devices, each of the second set of six portable communication devices located in a central region of a different cell adjacent to the first cell;

indicating the message is leaving the first cell; and

determining if the second portable communication device has received the message.

28. The method according to claim 27 wherein the step of instructing the third portable communication device to acquire the first set of six portable communication devices.further comprises steps of:

if less than six portable communication devices are available located in a different sector of the first cell, acquiring the available portable communication devices; and

instructing the available portable communication devices to modify propagation patterns to cover all cells adjacent to the first cell.

29. The method according to claim 28 wherein the step of instructing the available portable communication devices to modify propagation patterns further comprises step of restricting the propagation patterns.

30. The method according to claim 29 wherein the step of restricting the propagation patterns further comprises a step of specifying allowed sectors for the message to propagate.