Token-based receiver diversity

• US 7,668,542 B2
• Filed: 02/16/2005
• Issued: 02/23/2010
• Est. Priority Date: 01/11/2002
• Status: Expired due to Fees

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Bims, Harry
• Primary Examiner(s): Nguyen; Duc M
• Application Number:
  US11/059,463
• Publication Number:
  US 20050153719A1
• Time in Patent Office: 1,833 Days
• Field of Search: 370/331, 370/332, 370/333, 370/338, 455/41.2, 455436-440
• US Class Current: 455/432.1
• CPC Class Codes: H04B 7/02 Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas RAKE receivers H04B1/7115
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04B 7/0491 using two or more sectors, i.e. sector diversity
• CPC Class Codes: H04L 45/12 Shortest path evaluation
• CPC Class Codes: H04L 45/50 using label swapping, e.g. multi-protocol label switch [MPLS]
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 40/20 based on geographic position or location
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A token-based receiver diversity processing is described. In one embodiment, a receiver diversity comprises repeaters receiving wirelessly transmitted packets from a mobile station, and one of the repeaters forwarding packets of the wirelessly transmitted packets to a switch if the one repeater is currently assigned to forward packets from the mobile station based on an indicator assigned prior to the wirelessly transmitted packets being sent.

Claims

1. A network switch, comprising:

a plurality of ports, each of the plurality of ports configurable to communicate with one of a corresponding plurality of repeaters, wherein multiple repeaters receive packets from one of a plurality of mobile stations assigned to the network; and

processing logic configured (i) to pre-assign a token to one of the plurality of repeaters, wherein the token uniquely associates one of the repeaters with one of the mobile stations, (ii) to receive a packet from the one mobile station at each of the plurality of ports corresponding to the multiple repeaters that received the packets, (iii) to determine whether the packet was received cleanly at the port corresponding to the repeater associated with the one mobile station as indicated by the pre-assigned token, and (iv) if the packet was not received cleanly at the port corresponding to the repeater associated with the one mobile station, then to re-assign the token to a selected one of the plurality of repeaters that did receive the packet cleanly.

2. The network device of claim 1, wherein each of the packets received from the plurality of ports is an Ethernet packet.

3. The network device of claim 1, wherein each of the packets received from the plurality of ports includes an embedded packet and a received discrete signal strength indicator associated with the embedded packet.

4. The network device of claim 3, wherein each embedded packet comprises a packet received by one of the plurality of repeaters in accordance with a wireless communication protocol.

5. The network device of claim 3, wherein each received discrete signal strength indicator is a value selected from one of a set of predefined discrete values, and wherein the processing logic is further configured to map each received discrete signal strength indicator to a decibel signal strength value.

6. The network device of claim 1, wherein the processing logic is configured to assign a token to a selected one of the plurality of repeaters by sending an Add Token command to the selected repeater.

7. The network device of claim 1, wherein the processing logic is further configured to send packets addressed to the mobile station to the selected repeater.

8. The network device of claim 1, further comprising:

a database that includes a listing of mobile stations and the repeater assigned to send acknowledgement messages to the mobile station as indicated by the assigned token.

9. A method for coordinating communication in a network including a plurality of repeaters coupled to a network switch and a plurality of mobile stations broadcasting to the repeaters, the method comprising:

pre-assigning a token to one of the plurality of repeaters, wherein the token uniquely associates one of the repeaters with one of the mobile stations;

receiving at the network switch a packet from one of the mobile stations via multiple repeaters;

determining at the network switch whether the packet was received cleanly by the repeater associated with the one mobile station as indicated by the pre-assigned token; and

if the switch determines that the packet was not received cleanly at the repeater associated with the one mobile station, then reassigning the pre-assigned token to a selected one of the plurality of repeaters that did receive the packet cleanly.

10. The method of claim 9, wherein receiving a packet comprises receiving an Ethernet packet.

11. The method of claim 9, wherein receiving a packet comprises receiving a packet that includes an embedded packet and a received discrete signal strength indicator associated with the embedded packet.

12. The method of claim 11, wherein receiving a packet that includes an embedded packet comprises receiving a packet that includes a packet received by one of the plurality of repeaters in accordance with a wireless communication protocol.

13. The method of claim 11, wherein each received discrete signal strength indicator is a value selected from one of a set of predefined discrete values, and wherein comparing received discrete signal strength indicators associated with each of the packets comprises mapping each received discrete signal strength indicator to a decibel signal strength value.

14. The method of claim 9, wherein assigning a token to a selected one of the plurality of repeaters comprises sending an Add Token command to the selected one of the plurality of repeaters.

15. The method of claim 9, further comprising:

sending packets addressed to the mobile station to the selected repeater.

16. The method of claim 9, further comprising:

associating the mobile station with the selected repeater in a database.

17. A computer useable medium storing computer program logic for enabling a processor in a network switch to coordinate communication in a network including a plurality of repeaters coupled to the network switch and a plurality of mobile stations broadcasting to the repeaters, the computer program logic comprising:

first means for enabling the processor to pre-assign a token to one of the plurality of repeaters, wherein the token uniquely associates one of the repeaters with one of the mobile stations;

second means for enabling the processor to receive at the network switch a packet from one of the mobile stations via multiple repeaters;

third means for enabling the processor to compare received packets to determine whether the packet was received cleanly by the repeater associated with the one mobile station as indicated by the pre-assigned token; and

if the packet was not received cleanly at the repeater associated with the one mobile station, fourth means for enabling the processor to reassign the pre-assigned token to a selected one of the plurality of repeaters that did receive the packet cleanly.

18. The computer useable medium of claim 17, wherein the second means comprises means for enabling the processor to receive an Ethernet packet.

19. The computer useable medium of claim 17, wherein the second means comprises means for enabling the processor to receive a packet that includes an embedded packet and a received discrete signal strength indicator associated with the embedded packet.

20. The computer useable medium of claim 19, wherein the means for enabling the processor to receive a packet that includes an embedded packet comprises means for enabling the processor to receive a packet that includes a packet received by one of the plurality of repeaters in accordance with a wireless communication protocol.

21. The computer useable medium of claim 19, wherein the means comprises means for enabling the processor to assign a token to the repeater that transmitted a packet having an associated received discrete signal strength indicator indicative of the strongest received signal.

22. The computer useable medium of claim 19, wherein each received discrete signal strength indicator is a value selected from one of a set of predefined discrete values, and wherein the second means comprises means for enabling the processor to map each received discrete signal strength indicator to a decibel signal strength value.

23. The computer useable medium of claim 17, wherein the fourth means comprises means for enabling the processor to send an Add Token command to the selected one of the plurality of repeaters.

24. The computer useable medium of claim 17, further comprising:

fifth means for enabling the processor to send packets addressed to the mobile station to the selected repeater.

25. The computer useable medium of claim 17, further comprising:

fifth means for enabling the processor to associate the mobile station with the selected repeater in a database.