System architecture and method for increasing the capacity and speed of bluetooth access points

• US 20030016651A1
• Filed: 04/02/2001
• Published: 01/23/2003
• Est. Priority Date: 04/02/2001
• Status: Abandoned Application

• Current Assignee: Cougar Wireless Ltd.
• Original Assignee: Cougar Wireless Ltd.
• Inventors: Lee, Chun Yi, Chung, Wen Cheng, Lei, Sai Weng, Ng, Chiu Wa, Kwok, Yu Kwong, Chu, Wai Yin, Lau, Kin Nang
• Application Number:
  US09/825,312
• Publication Number:
  US 20030016651A1
• Time in Patent Office: Days
• US Class Current: 370/349
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04L 2101/604 Address structures or formats
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 84/22 with access to wired networks

Abstract

A system architecture for facilitating wireless communications includes a processor configured to implement interference avoidance processing and interference control processing for one or more groups of devices of a packet-communications system. The interference avoidance processing provides different addresses and a common clock for each of the groups of devices to minimize a frequency collision probability for the devices. The interference control processing detects when a same frequency element is selected for more than one of the devices for a same time slot and implements rescue processing to save data packets that are going to collide from being lost. In a preferred embodiment, the interference avoidance processing includes choosing particular address bits to provide the different addresses. In a preferred embodiment, the rescue processing is performed in consideration of a packet importance indicator which relates to one or more of: packet type, service type, a fairness criterion, and a history of prior connections made.

Claims

1. A system architecture for facilitating wireless communications between devices, comprising:

A processor configured to implement interference avoidance processing and interference control processing for one or more groups of devices of a packet-communications system, the interference avoidance processing providing different addresses and a common clock for each of the groups of devices to minimize a frequency collision probability for the devices, the interference control processing detecting when a same frequency element is selected for more than one of the devices for a same time slot and implementing rescue processing to save data packets that are going to collide from being lost.

2. The system architecture for facilitating wireless communications between devices of claim 1, wherein at least one of the groups of devices comprises a piconet.

3. The system architecture for facilitating wireless communications between devices of claim 1, wherein the one or more of the groups of devices comprise(s) a plurality of piconets.

4. The system architecture for facilitating wireless communications between devices of claim 1, wherein the interference avoidance processing includes choosing particular address bits to provide the different addresses.

5. The system architecture for facilitating wireless communications between devices of claim 4, wherein the particular address bits comprise A_1,3,5,7,9.

6. The system architecture for facilitating wireless communications between devices of claim 1, wherein the rescue processing is performed in consideration of a packet importance indicator.

7. The system architecture for facilitating wireless communications between devices of claim 6, wherein the packet importance indicator relates to packet type.

8. The system architecture for facilitating wireless communications between devices of claim 6, wherein the packet importance indicator relates to service type.

9. The system architecture for facilitating wireless communications between devices of claim 6, wherein the packet importance indicator relates to a fairness criterion.

10. The system architecture for facilitating wireless communications between devices of claim 9, wherein the fairness criterion comprises a history of prior connections made.

11. The system architecture for facilitating wireless communications between devices of claim 1, wherein the packet-communication system is a spread-spectrum, frequency-hopping, short-range packet-communications system.

12. The system architecture for facilitating wireless communications between devices of claim 1, wherein the packet-communication system is compatible with the Bluetooth standard.

13. The system architecture for facilitating wireless communications between devices of claim 1, wherein the packet-communication system is capable of operating in the 2.4-Gbit industrial, scientific and medical (ISM) band.

15. The method for facilitating wireless communications between devices of claim 14, wherein only particular address bits are chosen to provide the different addresses.

16. The method for facilitating wireless communications between devices of claim 15, wherein the particular address bits comprise A_1,3,5,7,9.

18. The method for facilitating wireless communications between devices of claim 17, wherein the step of inhibiting transmission of packets is performed in consideration of a packet importance indicator.

19. The method for facilitating wireless communications between devices of claim 18, wherein the packet importance indicator relates to packet type, service type and/or a fairness criterion.

20. The method for facilitating wireless communications between devices of claim 19, wherein the fairness criterion comprises a history of prior connections made.

21. The method for facilitating wireless communications between devices of claim 18, wherein the packet importance indicator is tuned.

14. A method for facilitating wireless communications between devices, comprising the step of:

controlling hopping frequency generators for a plurality of groups of communication devices with in range of each other to generate hopping frequency sequences for the groups of communications devices by providing the same clock values and different addresses to the hopping frequency generators.

17. A method for facilitating wireless communications between devices, comprising the steps of:

determining when frequency collisions will occur for a plurality of groups of communication devices within range of each other; and

inhibiting transmission of packets in all but one of the groups of communication devices during a collision time slot.