METHODS OF CHANNEL ACCESS IN A MESHED NETWORK

• US 20060274713A1
• Filed: 05/31/2006
• Published: 12/07/2006
• Est. Priority Date: 06/02/2005
• Status: Abandoned Application

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: LOGALBO, ROBERT D., PANDEY, APARNA, EKL, RANDY L., WARE, CHRISTOPHER G.
• Application Number:
  US11/421,085
• Publication Number:
  US 20060274713A1
• Time in Patent Office: Days
• US Class Current: 370/346
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

Methods for providing a client access to a channel in a meshed wireless local area network are disclosed. The methods comprise that a client in the meshed wireless local area network implement a polling based channel access methodology. The client determines that the channel is available by sensing that the channel is not busy and sends a request for access to the channel to an access point, wherein the request specifies a priority of data that is to be transmitted when the client is granted access to the channel. The client waits a time period before receiving at least one of a) a rejection of the request for access to the channel, b) access to the channel, c) modification of the request for access to the channel, and d) delay access to the channel.

Claims

1. A method for providing a client access to a channel in a meshed wireless local area network comprising:

at a client in the meshed wireless local area network, wherein the meshed wireless area network implements a polling based channel access methodology;

determining that the channel is available by sensing that the channel is not busy;

sending a request for access to the channel to an access point, wherein the request specifies a priority of data wherein the data will be transmitted when the client is granted access to the channel; and

waiting a time period before receiving at least one of a) a rejection of the request for access to the channel, b) access to the channel, c) modification of the request for access to the channel, and d) delay access to the channel.

2. The method of claim 1 wherein the request further comprises at least one of a duration and a queue size.

3. The method of claim 1 wherein the time period accounts for at least one of a a) queuing delay, b) request processing time, c) channel access delay, and d) random wait time.

4. The method of claim 3 wherein the random wait time depends upon at least one of the priority of data, a number of received requests, and a time available to the access point to allocate transmit opportunities to requests.

5. The method of claim 3 wherein the random wait time accommodates a channel access delay of a request at a higher priority than the request.

6. The method of claim 1 further comprising sleeping when the rejection of the request for access to the channel is received,

7. The method of claim 1 wherein the request is a short proprietary signaling message.

8. The method of claim 1 wherein the determining adheres to an IEEE 802.11 standard for contention based access to the channel.

9. The method of claim 1 wherein the at least one of a) a rejection of the request for access to the channel, b) access to the channel, c) modification of the request for access to the channel, and d) delay access to the channel provides polling based access to the channel.

10. A method for providing a client access to a channel in a meshed wireless local area network comprising:

at an access point in the meshed wireless local area network, wherein the meshed wireless area network implements a polling based channel access methodology;

receiving a request for the channel from the client, wherein the request specifies a priority of data wherein the data will be transmitted when the client is granted access to the channel;

acknowledging the request, and

waiting for a time period before sending at least one of a) a rejection of the request for access to the channel, b) access to the channel, c) modification of the request for access to the channel, and d) delay access to the channel.

11. The method of claim 10 wherein the request further comprise at least one of a duration and a queue size.

12. The method of claim 10 wherein the time period accounts for at least one of a a) queuing delay, b) request processing time, c) channel access delay, and d) random wait time.

13. The method of claim 12 wherein the random wait time depends upon at least one of the priority of data, a number of received requests and a time available to the access point to allocate transmit opportunities to requests.

14. The method of claim 12 wherein the random wait time accommodates a channel access delay of a request at a higher priority than the request.

15. The method of claim 10 wherein the request is valid for a specified time period.

16. The method of claim 10 further comprising sending a response wherein the response is at least one of a) a rejection of the request for access to the channel, b) access to the channel, c) modification of the request for access to the channel, and d) delay access to the channel.

17. The method of claim 16 wherein the response contains a request delay information element to indicate a time that the client may retry the request.

18. The method of claim 10 wherein the request comprises a quality of service control information element.

19. The method of claim 10 wherein the request adheres to an IEEE 802.11 “

Action”

management frame format.

20. The method of claim 10 wherein the at least one of a) a rejection of the request for access to the channel, b) access to the channel, c) modification of the request for access to the channel and d) delay access to the channel is indicated by the access point initiating polling based access methodology that adheres to Hybrid Co-ordination Function Controlled Channel Access as specified in IEEE 802.