Wireless ad-hoc network formation

• US 20070053351A1
• Filed: 04/28/2006
• Published: 03/08/2007
• Est. Priority Date: 07/14/2005
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Kalogridis, Georgios
• Application Number:
  US11/412,943
• Publication Number:
  US 20070053351A1
• Time in Patent Office: Days
• US Class Current: 370/386
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

A wireless communications system comprising at least two piconets, each piconet comprising a plurality of wireless communications devices in direct communication with other devices within the same piconet, wherein the system comprises a bridging device capable of simultaneously communicating with communications devices in two separate piconets, the bridging device being capable of routing communications traffic from communications devices in the first of the two piconets to communications devices in the second of the two piconets

Claims

1. A wireless communications system comprising at least two piconets, each piconet comprising a plurality of wireless communications devices in direct communication with other devices within the same piconet, wherein the system comprises a bridging device capable of simultaneously communicating with communications devices in two separate piconets, the bridging device being capable of routing communications traffic from communications devices in the first of the two piconets to communications devices in the second of the two piconets.

2. A wireless communications system as claimed in claim 1 wherein the first and second piconets use different PHY channels.

3. A wireless communications system as claimed in claim 1 wherein the first and second piconets use different MAC protocols.

4. A wireless communications system as claimed in claim 1 wherein the second piconet is a child piconet of the first piconet.

5. A wireless communications system as claimed in claim 1 wherein the bridging device monitors system and inter/intra-piconet communications traffic and organises the movement of communications devices between the two piconets as required in order to maximise system efficiency.

16. A data carrier comprising computer readable instructions that, when loaded onto a communications device, causes the device to operate as a bridging device as described in any of the above claims.

6. A bridging communications device for use in a wireless communications system comprising two or more piconets, each piconet comprising a number of wireless communications devices wherein devices within a particular piconet are in direct wireless communication with other devices within the same piconet, the bridging device comprising means for communicating with a first piconet in the system and means for communicating with a second piconet in the system wherein the bridging device is capable of routing communications traffic from devices in the first piconet to devices in the second piconet.

7. A bridging communications device as claimed in claim 6 wherein the device utilises a first MAC protocol with the first piconet that it is in communication with and utilises a second MAC protocol with the second piconet that it is in communication with.

8. A method of dividing an ad-hoc wireless network comprising a plurality of wireless communications devices from a single original piconet into two piconets comprising the steps of:

i) Evaluating the network and deciding that network efficiency may be increased by dividing the original piconet and separating a number of communications devices into a further piconet

ii) initiating the creation of the further piconet

iii) inviting communications devices identified in step (i) to join the further piconet

(iv) associating the devices in identified in step (i) with the further piconet

wherein communications devices in the further piconet and communications devices remaining in the original piconet are in communication with one another via a wireless bridging communications device, the bridging device being capable of simultaneously communicating with communications devices in the two piconets.

9. A method as claimed in claim 8 wherein the bridging device is the piconet coordinator of the further piconet.

10. A method as claimed in claim 8 wherein the bridging device evaluates the network and decides to divide the original piconet.

11. A method as claimed in claim 8 wherein the piconet coordinator of the original piconet evaluates the network and decides to invite the bridging device to divide the original piconet.

12. A method as claimed in claim 8 wherein, prior to division of the original piconet, the bridging device is one of the plurality of devices in the original piconet.

13. A method as claimed in claim 8 wherein the original and further piconets have different MAC protocols.

14. A method as claimed in claim 8 wherein devices associating with the further piconet do not disassociate with the original piconet.

15. A method as claimed in claim 8 wherein the bridging device monitors communications within each piconet and between the two piconets and moves communications devices between the two piconets as required in order to maintain the most efficient arrangement of network resources.