Dynamically dedicated wireless local area network service for high definition video teleconferencing

• US 9,313,786 B2
• Filed: 09/14/2012
• Issued: 04/12/2016
• Est. Priority Date: 07/29/2009
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Diener, Neil Robert, Choudhury, Abhijit Kumar, Hart, Brian Donald, Stephenson, David S.
• Primary Examiner(s): Sheikh, Ayaz
• Assistant Examiner(s): Aga, Sori
• Application Number:
  US13/618,299
• Publication Number:
  US 20130010731A1
• Time in Patent Office: 1,306 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04N 7/148 Interfacing a video terminal to a particular transmission medium, e.g. ISDN
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

In an example embodiment described herein is an apparatus comprising a wireless transceiver and channel selection logic coupled to the wireless transceiver and operable to select an operating frequency for the wireless transceiver. The channel selection logic is configured to reserve a dedicated channel having a special identifier. The channel selection logic is configured to have the wireless transceiver advertise the dedicated service on a normal operating frequency. The channel selection logic is responsive to receiving a request from a wireless device via the wireless transceiver on the normal operating frequency to use the dedicated channel to switch to the dedicated channel and establish communications with the wireless device on the dedicated channel.

Claims

1. Logic encoded in a non-transitory, tangible computer readable medium for execution by a processor, and when executed by the processor operable to:

select an operating frequency for a wireless transceiver of a first access point to establish a first non-dedicated channel;

reserve a second dedicated channel for a dedicated service having a special identifier;

control the wireless transceiver to advertise the dedicated service on the first channel;

switch from the first channel to the second channel and establish communications with a wireless device on the second channel responsive to receiving a request from the wireless device via the wireless transceiver on the first channel to use the dedicated service; and

upon determining to switch to the second channel, instructing other clients having previously established communications with the first access point using the first channel to disassociate with the first access point and providing a list of suitable access points to the other clients.

2. The logic according to claim 1, further operable to verify the wireless device is authorized to use the dedicated service before establishing communications with the wireless device on the second channel.

3. The logic according to claim 1, further operable to return to the first channel responsive to finishing communications with the wireless device on the second channel.

4. The logic according to claim 1, further operable to establish communications with the wireless device on the second channel by associating with the wireless device on the second channel.

5. The logic according to claim 1, further operable to send and receive data via a second wireless transceiver, wherein the second wireless transceiver is configured to operate on the second channel;

and

provide the dedicated service via the second wireless transceiver to communicate with the wireless device on the second channel.

6. The logic according to claim 1, further operable to scan the second channel for potential radar signals;

and

select a third channel responsive to determining potential radar signals have been received on the second channel.

7. The logic according to claim 1, further operable to delay switching to the second channel until observing the wireless device has one of a group consisting of a steady Received Signal Strength Indication for a predetermined time period and a Received Signal Strength Indication above a minimum threshold for the predetermined time period.

8. The logic according to claim 1, further operable to:

employ a second wireless transceiver to communicate on the second channel; and

establish communications with a second wireless device on the second channel responsive to receiving a second request from the second wireless device via the wireless transceiver and the first channel.

9. The logic according to claim 1, further operable to limit the access to the second channel to a predefined number of devices.

25. The logic according to claim 1, further operable to terminate the transmission of SSIDs associated with the first channel after the other clients have been instructed to disassociate with the first access point.

10. A method comprising:

selecting an operating frequency for a wireless transceiver of a first access point to establish a first non-dedicated channel;

reserving a second dedicated channel for a dedicated service having a special identifier;

controlling the wireless transceiver to advertise the dedicated service on the first channel;

switching from the first channel to the second channel and establishing communications with a wireless client device on the second channel responsive to receiving a request from the wireless device via the wireless transceiver on the first channel to use the dedicated service; and

upon determining to switch to the second channel, instructing other clients having previously established communications with the first access point using the first channel to disassociate with the first access point and providing a list of suitable access points to the other clients.

11. The method according to claim 10, further comprising verifying the wireless client device is authorized to use the dedicated service before establishing communications with the wireless client device on the second channel.

12. The method according to claim 10, further comprising returning to the first channel responsive to finishing communications with the wireless client device on the second channel.

13. The method according to claim 10, further comprising establishing communications with the wireless client device on the second channel by associating with the wireless client device on the second channel.

14. The method according to claim 10, further comprising:

sending and receiving data, via a second wireless transceiver, wherein the second wireless transceiver is configured to operate on the second channel; and

providing the dedicated service via the second wireless transceiver to communicate with the wireless client device on the second channel.

15. The method according to claim 10, further comprising:

scanning the second channel for potential radar signals; and

selecting a third channel responsive to determining potential radar signals have been received on the second channel.

16. The method according to claim 10, further comprising delaying switching to the second channel until observing the wireless client device has one of a group consisting of a steady Received Signal Strength Indication for a predetermined time period and a Received Signal Strength Indication above a minimum threshold for the predetermined time period.

17. The method according to claim 10, further comprising:

employing a second wireless transceiver to communicate on the second channel; and

establishing communications with a second wireless client device on the second channel responsive to receiving a second request from the second wireless client device via the wireless transceiver on the first channel.

18. The method according to claim 10, further comprising limiting access to the second channel to a predefined number of wireless client devices.

19. Logic encoded in a non-transitory, tangible computer readable medium for execution by a processor, and when executed by a processor operable to:

advertise, on a first channel, a first service set identifier associated with the first channel;

advertise, on the first channel, a second service set identifier associated with a second channel associated with a dedicated service;

receive an association request from a first client for the second service set identifier associated with the second channel;

associate the first client to the second service set identifier associated with the second channel;

switch from the first channel to the second channel responsive to associating the first client to the second service set identifier associated with the second channel associated with the dedicated service;

establish communications with the first client on the second channel; and

upon determining to switch to the second channel, instructing other clients having previously established communications with the first channel to disconnect from the first channel and send data representative of neighboring access points to the other clients.

20. The logic according to claim 19, wherein instructing the other clients to disconnect form the first channel comprises:

sending a frame to the other clients on the first channel to terminate communications with the other clients.

21. The logic according to claim 19, the associating further operable to verify the first client is authorized to access the service set identifier associated with the second channel.

22. The logic according to claim 19, further operable to perform a radar detection check on the second channel prior to establishing communications with the first client on the second channel.

23. The logic according to claim 22, further operable to:

send a message to the first client to switch to a third channel responsive to detecting radar in the second channel; and

switch to the third channel after sending the message to the first client to switch to the third channel.

24. The logic according to claim 19, further operable to limit access to the second channel to one device at a time.