Coordination between simultaneously operating Pico-Nets in high mobility wireless networks

• US 20050128991A1
• Filed: 01/07/2005
• Published: 06/16/2005
• Est. Priority Date: 05/08/2003
• Status: Abandoned Application

• Current Assignee: Dynamic MESH Networks Incorporated
• Original Assignee: Dynamic MESH Networks Incorporated
• Inventors: DaCosta, Francis, Dayanandan, Sriram
• Application Number:
  US11/036,297
• Publication Number:
  US 20050128991A1
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

An embodiment of the present invention addresses Beacon Synchronization issues related to multiple Simultaneously operating Pico-Nets that could be potentially interfering with each other'"'"'s transmissions. Algorithms and support functions are described that determine the optimal staggering of Beacons in the Contention Access Period (CAP) of an IEEE 802.15.X Pico-Net, where 802.15.X denotes both 802.15.3 and 802.15.4 application sets. The objectives of this invention are related to both types of networks. The approach described is stable, scalable and efficient. It is comprehensive, in that it addresses all typical use cases for how Devices and Pico Net Controllers would need to coordinate beacon information to ensure trouble free operation.

Claims

1. A dynamic wireless network comprising:

multiple wireless sub networks operating within the range of each other, wherein each of said wireless sub networks is managed by a PNC, and wherein the transmissions of information within said sub network are synchronized by a beacon transmission from said PNC, and wherein PNCs adjust the timing of their beacon transmissions so as not to interfere with other PNC beacon transmissions.

2. The dynamic wireless network as in claim 1 wherein a systematic flow of information is transmitted on both a periodic and on an exception basis through the network using the devices in the network (both PNC and client devices) to convey information of one part of the wireless network to another as in a relay fashion.

3. The dynamic wireless network as in claim 2 where the information flow from client devices in a sub network is transmitted to the PNC managing those devices, so that the particular PNC is made aware of other PNCs in the range of devices in the particular PNC'"'"'s sub network.

4. The dynamic wireless network as in claim 3 where multiple PNCs coordinate their beacon transmissions to align their CAP and CTA periods.