Multi-channel single radio communication in home mesh network

• US 8,861,445 B2
• Filed: 03/11/2009
• Issued: 10/14/2014
• Est. Priority Date: 03/11/2009
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Jing, Xiangpeng, Patil, Abhishek, Liu, Aixin, Nguyen, Djung N.
• Primary Examiner(s): Hamza, Faruk
• Assistant Examiner(s): LO, DIANE LEE
• Application Number:
  US12/402,414
• Publication Number:
  US 20100232369A1
• Time in Patent Office: 2,043 Days
• Field of Search: None
• US Class Current: 370/329
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 74/085 collision avoidance
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

An embodiment is a technique to use a single radio for multi-channel wireless communication. A local device having a local channel table operates on a common channel in a multi-channel wireless network having a plurality of network devices to perform management, control, and discovery functions using a single radio. A data session channel is negotiated with a remote device having a remote channel table upon an initiation of a communication session using the local and remote channel tables on the common channel. Data packets are exchanged with the remote device using the data session channel in a data transmission mode.

Claims

1. Device comprising:

at least one transceiver;

at least one processor configured to communicate with the transceiver;

at least one computer memory device storing instructions which when executed by the processor configure the processor for;

using a common channel in a multi-channel wireless network to perform at least one control function with at least one target device;

negotiating, over the common channel, a data session channel with the target device, the data session channel being different than the common channel;

exchanging data packets with the target device using the data session channel; and

establishing a local channel table containing information on active data channels in the network, wherein local channel table includes a figure of merit (FoM) for each candidate data channel reflecting a quantitative measure of the respective channel, at least first and second nodes exchanging local channel tables and using the figures of merit to establish the data channel.

2. The device of claim 1 wherein using the common channel comprises:

performing a management operation being at least one of beaconing, association, and authentication operations;

sending a routing message;

exchanging special messages having information on traffic flow and channel selection with network devices; and

forming a local channel table containing information on active channels in the network.

3. The device of claim 2 wherein forming the local channel table comprises:

gathering the information on the active channels from the special messages; and

sorting the active channels in terms of an availability criterion using the gathered information.

4. The device of claim 2 wherein negotiating comprises:

sending the local channel table to the target device;

receiving the remote channel table from the target device;

selecting a most available channel common to the local data channel and the remote channel table;

confirming the most available channel being the data session channel; and

announcing use of the data session channel.

5. The device of claim 1 wherein exchanging data comprises:

switching the transceiver to the data session channel; and

exchanging packets of the data with the target device.

6. The device of claim 1 wherein the instructions when executed by the processor further configure the processor for releasing the data session channel after the data transmission mode is terminated.

7. The device of claim 6 wherein releasing the data session channel comprises:

switching the transceiver from the data session channel;

returning to the common channel; and

announcing release of the data session channel.

8. The device of claim 1 wherein negotiating further comprises negotiating a sub-optimal channel or backing off traffic to wait for an available channel if there is no vacant channel.

9. The device of claim 1 wherein the data session channel is extended from the common channel to accommodate a non-mesh device.

10. The device of claim 1 wherein the network conforms to an 802.11 standard.

11. An article of manufacture comprising:

a non-transitory machine-accessible storage medium including data that, when accessed by a machine, cause the machine to perform operations comprising;

using a common channel in a multi-channel wireless network to perform at least one control function with at least one target device;

negotiating, over the common channel, a data session channel with the target device, the data session channel being different than the common channel; and

exchanging data packets with the target device using the data session channel, and

establishing a local channel table containing information on active data channels in the network, wherein local channel table includes a figure of merit (FoM) for each candidate data channel reflecting a quantitative measure of the respective channel, at least first and second nodes exchanging local channel tables and using the figures of merit to establish the data channel.

12. The article of manufacture of claim 11 wherein using the common channel comprises:

performing a management operation being at least one of beaconing, association, and authentication operations;

sending a routing message;

exchanging special messages having information on traffic flow and channel selection with network devices; and

forming a local channel table containing information on active channels in the network.

13. The article of manufacture of claim 12 wherein forming the local channel table comprises:

gathering the information on the active channels from the special messages; and

sorting the active channels in terms of an availability criterion using the gathered information.

14. The article of manufacture of claim 12 wherein negotiating comprises:

sending the local channel table to the target device;

receiving the remote channel table from the target device;

selecting a most available channel common to the local data channel and the remote channel table;

confirming the most available channel being the data session channel; and

announcing use of the data session channel.

15. The article of manufacture of claim 11 wherein exchanging data comprises:

switching the transceiver to the data session channel; and

exchanging packets of the data with the target device.

16. The article of manufacture of claim 11 wherein the using the common channel includes communicating at least one frame structure including at least three frames or fields, namely, a control frame, a non-mesh frame, and a mesh data frame, the control frame including one or more of beacon, synchronization, timing, discovery messages, the non-mesh frame including data pertaining to non-mesh devices in the network, the mesh data frame including data pertaining to mesh devices in the network, at least some of the data being operable to implement a network communication mode change from ad-hoc mode to managed mode.

17. The article of manufacture of claim 16 wherein releasing the data session channel comprises:

switching the transceiver from the data session channel;

returning to the common channel; and

announcing release of the data session channel.

18. The article of manufacture of claim 11 wherein negotiating further comprises negotiating a sub-optimal channel or backing off traffic to wait for an available channel if there is no vacant channel.

19. Method comprising:

using a common channel in a multi-channel wireless network to perform at least one control function with at least one target device;

negotiating, over the common channel, a data session channel with the target device, the data session channel being different than the common channel and being orthogonal thereto;

exchanging data packets with the target device using the data session channel; and

establishing a local channel table containing information on active data channels in the network, wherein local channel table includes a figure of merit (FoM) for each candidate data channel reflecting a quantitative measure of the respective channel, at least first and second nodes exchanging local channel tables and using the figures of merit to establish the data channel.

20. The method of claim 19 wherein using the common channel comprises:

performing a management operation being at least one of beaconing, association, and authentication operations;

sending a routing message; and

exchanging special messages having information on traffic flow and channel selection with network devices.

21. The method of claim 20 wherein establishing the local channel table comprises:

gathering the information on the active channels from the special messages; and

sorting the active channels in terms of an availability criterion using the gathered information.

22. The method of claim 19 wherein negotiating comprises:

sending the local channel table to the target device;

receiving the remote channel table from the target device;

selecting a most available channel common to the local data channel and the remote channel table;

confirming the most available channel being the data session channel; and

announcing use of the data session channel.

23. The method of claim 19 wherein exchanging data comprises:

switching the transceiver to the data session channel; and

exchanging packets of the data with the target device.

24. The method of claim 19, comprising releasing the data session channel after the data transmission mode is terminated.

25. The method of claim 24 wherein releasing the data session channel comprises:

switching the transceiver from the data session channel;

returning to the common channel; and

announcing release of the data session channel.

26. The method of claim 19 wherein negotiating further comprises negotiating a sub-optimal channel or backing off traffic to wait for an available channel if there is no vacant channel.