Dual MAC arbitration

• US 7,773,573 B2
• Filed: 01/25/2010
• Issued: 08/10/2010
• Est. Priority Date: 02/16/2006
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell World Trade Limited (Marvell Technology Group Limited)
• Inventors: Chung, Chia-Chun, Ho, Ken Kinwah
• Primary Examiner(s): Appiah; Charles N
• Assistant Examiner(s): AJIBADE AKONAI, OLUMIDE
• Application Number:
  US12/693,184
• Publication Number:
  US 20100118792A1
• Time in Patent Office: 197 Days
• Field of Search: 455/422.1, 455/512, 455/550.1, 455/552.1, 455/553.1, 370/229, 370/230, 370/252, 370/329, 370/338, 370/345, 370/349, 370/412, 370/414, 370/417, 370/445, 370/465, 370/466, 370/470
• US Class Current: 370/338
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

A network appliance includes a first media access controller with a first transmit queue storing one or more data packets to be transmitted to a first wireless device. A second media access controller includes a second transmit queue storing one or more data packets to be transmitted to a second wireless device. A baseband processor communicates with the first and the second media access controllers. An arbitration module arbitrates access of the first and second media access controllers to the baseband processor based on whether the first and second transmit queues have data packets to be transmitted to the first and second wireless devices, respectively. When both have data packets to be transmitted, the arbitration module instructs the first or second media access controller to flush any data packets stored in the first or second transmit queue so that transmission of a flushed data packet can be re-tried.

Claims

1. A network appliance comprising:

a first media access controller configured to associate with a first wireless device, the first media access controller including

a first transmit queue configured to store one or more data packets to be transmitted to the first wireless device;

a second media access controller configured to associate with a second wireless device, the second media access controller including

a second transmit queue configured to store one or more data packets to be transmitted to the second wireless device;

a baseband processor in communication with each of the first media access controller and the second media access controller; and

an arbitration module configured to;

arbitrate access of (i) the first media access controller and (ii) the second media access controller to the baseband processor based on whether the first transmit queue and the second transmit queue have any data packets to be respectively transmitted to the first wireless device and the second wireless device, and

in response to both the first transmit queue and the second transmit queue simultaneously having one or more data packets to be respectively transmitted to the first wireless device and the second wireless device, instruct either (i) the first media access controller to flush any data packets stored in the first transmit queue or (ii) the second media access controller to flush any data packets stored in the second transmit queue so that transmission of a flushed data packet can be re-tried.

2. The network appliance of claim 1, wherein each of (i) the first media access controller, (ii) the second media access controller, (iii) the arbitration module, and (iv) the baseband processor are implemented as part of a system-on-chip.

3. The network appliance of claim 2, further comprising an RF module in communication with the baseband processor.

4. The network appliance of claim 3, further comprising:

a third media access controller in communication with a distributed communications system,

wherein each of (i) the first media access controller and (ii) the second media access controller is configured to communicate with the distributed communications system through the third media access controller.

5. The network appliance of claim 4, wherein the third media access controller is also implemented as part of the system-on-chip.

6. The network appliance of claim 4, wherein the distributed communications system comprises the Internet.

7. The network appliance of claim 1, wherein the arbitration module is further configured to arbitrate access of (i) the first media access controller and (ii) the second media access controller to the baseband processor based on a predetermined hierarchy between the first media access controller and the second media access controller.

8. The network appliance of claim 1, wherein:

the first network device is in a first subnetwork;

the second network device is in a second subnetwork; and

the first subnetwork is separate from the second subnetwork.

9. The network appliance of claim 8, wherein the first subnetwork is configured to operate in a different network mode relative to the second subnetwork.

10. The network appliance of claim 9, wherein:

the first subnetwork is configured in an ad-hoc mode; and

the second subnetwork is configured in an infrastructure mode.

11. The network appliance of claim 1, wherein the network appliance comprises an audio/visual entertainment system.

12. A method for transmitting one or more data packets from a network appliance to each of a first wireless device and a second wireless device, the network appliance including:

(i) a first media access controller configured to associate with the first wireless network device, (ii) a second media access controller configured to associate with the second wireless network device and (iii) a baseband processor in communication with each of the first media access controller and the second media access controller, the first media access controller including a first transmit queue configured to store one or more data packets to be transmitted to the first wireless device, the second media access controller including a second transmit queue configured to store one or more data packets to be transmitted to the second wireless device, the method comprising;

arbitrating access of (i) the first media access controller and (ii) the second media access controller to the baseband processor based on whether the first transmit queue and the second transmit queue have any data packets to be respectively transmitted to the first wireless device and the second wireless device; and

in response to both the first transmit queue and the second transmit queue simultaneously having one or more data packets to be respectively transmitted to the first wireless device and the second wireless device, instructing either (i) the first media access controller to flush any data packets stored in the first transmit queue or (ii) the second media access controller to flush any data packets stored in the second transmit queue so that transmission of a flushed data packet can be re-tried.

13. The method of claim 12, wherein each of (i) the first media access controller, (ii) the second media access controller, and (iii) the baseband processor are implemented as part of a system-on-chip.

14. The method of claim 13, wherein:

the first network device is in a first subnetwork;

the second network device is in a second subnetwork; and

the first subnetwork is separate from the second subnetwork.

15. The method of claim 14, wherein the network appliance comprises an audio/visual entertainment system.

16. A program, tangibly stored on a computer-readable medium, for transmitting one or more data packets from a network appliance to each of a first wireless device and a second wireless device, the network appliance including:

(i) a first media access controller configured to associate with the first wireless network device, (ii) a second media access controller configured to associate with the second wireless network device and (iii) a baseband processor in communication with each of the first media access controller and the second media access controller, the first media access controller including a first transmit queue configured to store one or more data packets to be transmitted to the first wireless device, the second media access controller including a second transmit queue configured to store one or more data packets to be transmitted to the second wireless device, the program comprising instructions for;

arbitrating access of (i) the first media access controller and (ii) the second media access controller to the baseband processor based on whether the first transmit queue and the second transmit queue have any data packets to be respectively transmitted to the first wireless device and the second wireless device; and

in response to both the first transmit queue and the second transmit queue simultaneously having one or more data packets to be respectively transmitted to the first wireless device and the second wireless device, instructing either (i) the first media access controller to flush any data packets stored in the first transmit queue or (ii) the second media access controller to flush any data packets stored in the second transmit queue so that transmission of a flushed data packet can be re-tried.

17. The program of claim 16, wherein each of (i) the first media access controller, (ii) the second media access controller, and (iii) the baseband processor are implemented as part of a system-on-chip.

18. The program of claim 17, wherein:

the first network device is in a first subnetwork;

the second network device is in a second subnetwork; and

the first subnetwork is separate from the second subnetwork.

19. The program of claim 18, wherein the network appliance comprises an audio/visual entertainment system.