Packet exchange arbitration for coexisting radios

• US 8,472,427 B1
• Filed: 03/25/2010
• Issued: 06/25/2013
• Est. Priority Date: 04/06/2009
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell International Limited (Marvell Technology Group Limited)
• Inventors: Wheeler, Todd Steven, Wong, Gladys Yuen Yan, Mack, Robert, Ho, Ken Kinwah
• Primary Examiner(s): Skripnikov, Alex
• Application Number:
  US12/732,036
• Time in Patent Office: 1,188 Days
• Field of Search: None
• US Class Current: 370/348
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 72/569 of the traffic information

Abstract

The present specification describes techniques for packet exchange arbitration. In some embodiments, a request is maintained to an arbiter at least until a packet exchange has been communicated and/or at least until a time-sensitive packet is communicated. In some other embodiments, a grant of a request is delayed at least until the communication of an isochronous packet.

Claims

1. A method comprising:

receiving, at an arbiter, a first request from a first radio module for access to an antenna, the arbiter configured to arbitrate access to the antenna between the first radio module and a second radio module, the first request having a first priority level;

granting the first request of the first radio module for access to the antenna effective to enable the first radio module to communicate a packet via the antenna as part of a packet exchange, the packet exchange comprising a plurality of packets, the first radio module configured to maintain the first request to the arbiter until all of the plurality of packets of the packet exchange have been communicated; and

ceasing to grant the first request of the first radio module for access to the antenna responsive to the second radio module initiating a second request to the arbiter that has a second priority level that is higher than the first priority level of the first request.

2. The method of claim 1, wherein the first radio module comprises a wireless local area network radio, and the second radio module comprises a short-range wireless radio.

3. The method of claim 2, wherein the wireless local area network radio is configured to communicate according to a protocol compliant with an IEEE 802.11 standard, and the short-range wireless radio is configured to communicate according to a personal-area-network protocol.

4. The method of claim 1, wherein one of the priority levels is set to a default priority level.

5. The method of claim 1, wherein the first radio module is further configured to maintain the first request until a request timeout occurs.

6. The method of claim 1, wherein the first radio module is further configured to maintain the first request until a response packet is received from a remote entity via the antenna, the response packet ending the packet exchange.

7. The method of claim 1, wherein one of the priority levels is determined by an escalation algorithm.

8. A communication device comprising:

a first radio module;

a second radio module;

an arbiter configured to arbitrate access to an antenna between the first radio module and the second radio module, the arbiter configured to;

receive, from the first radio module, a first request for access to the antenna, the first request having a first priority level;

grant the first request effective to enable the first radio module to communicate a packet as part of a packet exchange comprising a plurality of packets, the first radio module configured to maintain the first request to the arbiter until the plurality of packets of the packet exchange are communicated; and

cease to grant the first request of the first radio module for access to the antenna responsive to receiving a second request from the second radio module, the second request having a second priority level that is higher than the first priority level of the first request.

9. The communication device of claim 8, wherein the first radio module comprises a wireless local area network radio, and the second radio module comprises a short-range wireless radio.

10. The communication device of claim 9, wherein the wireless local area network radio is configured to communicate according to a protocol compliant with an IEEE 802.11 standard, and the short-range wireless radio is configured to communicate according to a personal-area-network protocol.

11. The communication device of claim 8, wherein the arbiter is further configured to associate the first priority level with the first request of the first radio module, the first priority level affecting the grant of the first request.

13. The communication device of claim 8, wherein the communication device comprises one of a media device, communication device, computer device, gaming device, photography device, electronic device, or a portable phone.

14. The communication device of claim 8, wherein one of the priority levels is set to a default priority level or determined by an escalation algorithm.

12. The communication device of 8, wherein the first radio module is further configured to maintain the first request until a request timeout occurs.

15. One or more computer-readable storage devices storing computer executable instructions, the instructions executable to perform a method comprising:

receiving, at an arbiter, a first request from a first radio module for access to an antenna, the arbiter configured to arbitrate access to the antenna between the first radio module and a second radio module, the first request having a first priority level;

granting the first request of the first radio module for access to the antenna effective to enable the first radio module to communicate a packet via the antenna as part of a packet exchange, the packet exchange comprising a plurality of packets, the first radio configured to maintain the first request to the arbiter until all of the plurality of packets of the packet exchange have been communicated; and

ceasing to grant the first request of the first radio module for access to the antenna responsive to the second radio module initiating a second request to the arbiter that has a second priority level that is higher than the first priority level of the first request.

16. The computer-readable storage devices of claim 15, wherein the first radio module comprises a wireless local area network radio, and the second radio module comprises a short-range wireless radio.

17. The computer-readable storage devices of claim 16, wherein the wireless local area network radio is configured to communicate according to a protocol compliant with an IEEE 802.11 standard, and the short-range wireless radio is configured to communicate according to a personal-area-network protocol.

18. The computer-readable storage devices of claim 15, wherein the first or the second priority levels affect the grant of the first request or a grant of the second request respectively.

19. The computer-readable devices of claim 15, wherein the first radio module is further configured to maintain the first request until a request timeout occurs.

20. The one or more computer-readable storage devices of claim 15, wherein one of the priority levels is set to a default priority level or determined by an escalation algorithm.