Multi-band communications for a single wireless base station

• US 8,971,306 B1
• Filed: 12/11/2012
• Issued: 03/03/2015
• Est. Priority Date: 09/07/2004
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell International Limited (Marvell Technology Group Limited)
• Inventors: Loc, Peter, Tang, Foo Keong
• Primary Examiner(s): Harper, Kevin C
• Application Number:
  US13/711,230
• Time in Patent Office: 812 Days
• Field of Search: None
• US Class Current: 370/345
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/569 of the traffic information
• CPC Class Codes: H04W 74/06 using polling
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A method of operating an access point includes storing, for each of a plurality of channels, a corresponding first value and second value. A first channel is selected according to a channel polling scheme. A first beacon is transmitted over the first channel to announce commencement of communication over the first channel. Subsequent to the first beacon but prior to a second beacon, data is exchanged with a wireless client over the first channel. The method includes, in response to a first time period based on the first value corresponding to the first channel expiring, transmitting the second beacon over the first channel to announce conclusion of communication over the first channel. The method includes, in response to a second time period based on the second value corresponding to the first channel expiring, transmitting a third beacon over the first channel to announce commencement of communication over the first channel.

Claims

1. A wireless access point comprising:

a memory configured to store, for each channel of a plurality of wireless channels,

(i) a corresponding first value indicative of a length of an interval the wireless access point spends communicating using the channel, and

(ii) a corresponding second value indicative of a time between intervals of the wireless access point communicating using the channel; and

a controller configured to

according to a channel polling scheme, select a first channel of the plurality of wireless channels,

transmit a first beacon frame over the first channel, wherein the first beacon frame announces commencement of infrastructure mode communication over the first channel,

subsequent to transmission of the first beacon frame but prior to transmission of a second beacon frame, selectively exchange data frames with a wireless client over the first channel,

in response to a first time period expiring, transmit the second beacon frame over the first channel, wherein the second beacon frame announces conclusion of infrastructure mode communication over the first channel, wherein the first time period begins subsequent to transmission of the first beacon frame, and wherein the first time period has a length based on the first value corresponding to the first channel, and

in response to a second time period expiring, transmit a third beacon frame over the first channel, wherein the third beacon frame announces commencement of infrastructure mode communication over the first channel, wherein the second time period begins subsequent to transmission of the second beacon frame, and wherein the second time period has a length based on the second value corresponding to the first channel.

2. The wireless access point of claim 1, wherein the first channel corresponds to a frequency of approximately 2.4 GHz or a frequency of approximately 5 GHz, and a second channel of the plurality of wireless channels corresponds to the other of the frequency of approximately 2.4 GHz or the frequency of approximately 5 GHz.

3. The wireless access point of claim 1, further comprising a plurality of channel queues, wherein each channel queue is configured to store frames of data to be transmitted over a respective one of the plurality of wireless channels.

4. The wireless access point of claim 1, wherein wireless clients are permitted to communicate using ad hoc mode subsequent to transmission of the second beacon frame but prior to transmission of the third beacon frame.

5. The wireless access point of claim 1, wherein the first beacon frame includes a representation of the first value corresponding to the first channel.

6. The wireless access point of claim 1, wherein the second beacon frame includes a representation of the second value corresponding to the first channel.

7. The wireless access point of claim 1, wherein the channel polling scheme is based on priority of traffic carried on each of the plurality of wireless channels.

8. The wireless access point of claim 1, wherein the channel polling scheme is a round-robin polling scheme.

9. The wireless access point of claim 1, wherein the controller is configured to construct the channel polling scheme in response to user input.

10. The wireless access point of claim 1, wherein the controller is configured to learn traffic patterns and adaptively determine the channel polling scheme in response to the learned traffic patterns.

11. A method of operating a wireless access point, the method comprising:

storing, for each channel of a plurality of wireless channels, a corresponding first value indicative of a length of an interval the wireless access point spends communicating using the channel;

storing, for each channel of the plurality of wireless channels, a corresponding second value indicative of a time between intervals of the wireless access point communicating using the channel;

according to a channel polling scheme, selecting a first channel of the plurality of wireless channels;

transmitting a first beacon frame over the first channel, wherein the first beacon frame announces commencement of infrastructure mode communication over the first channel;

subsequent to transmission of the first beacon frame but prior to transmission of a second beacon frame, selectively exchanging data frames with a wireless client over the first channel;

in response to a first time period expiring, transmitting the second beacon frame over the first channel, wherein

the second beacon frame announces conclusion of infrastructure mode communication over the first channel,

the first time period begins subsequent to transmission of the first beacon frame, and

the first time period has a length based on the first value corresponding to the first channel; and

in response to a second time period expiring, transmitting a third beacon frame over the first channel, wherein

the third beacon frame announces commencement of infrastructure mode communication over the first channel,

the second time period begins subsequent to transmission of the second beacon frame, and

the second time period has a length based on the second value corresponding to the first channel.

12. The method of claim 11, wherein the first channel corresponds to a frequency of approximately 2.4 GHz or a frequency of approximately 5 GHz, and a second channel of the plurality of wireless channels corresponds to the other of the frequency of approximately 2.4 GHz or the frequency of approximately 5 GHz.

13. The method of claim 11, further comprising storing frames of data in a plurality of channel queues, wherein each of the plurality of channel queues corresponds to a respective one of the plurality of wireless channels and the stored frames of data are to be transmitted over the respective one of the plurality of wireless channels.

14. The method of claim 11, wherein wireless clients are permitted to communicate using ad hoc mode subsequent to transmission of the second beacon frame but prior to transmission of the third beacon frame.

15. The method of claim 11, wherein the first beacon frame includes a representation of the first value corresponding to the first channel.

16. The method of claim 11, wherein the second beacon frame includes a representation of the second value corresponding to the first channel.

17. The method of claim 11, further comprising determining the channel polling scheme based on priority of traffic carried on each of the plurality of wireless channels.

18. The method of claim 11, wherein the channel polling scheme is a round-robin polling scheme.

19. The method of claim 11, further comprising constructing the channel polling scheme in response to user input.

20. The method of claim 11, further comprising learning traffic patterns and adaptively determining the channel polling scheme in response to the learned traffic patterns.