Method, system, and devices for fast session transfer of wireless devices from one frequency band to another

摘要

Embodiments are directed to switching of stations STA, access points APs and PCPs that are communicating through a wireless link from one frequency band to another. One embodiment is directed to switching of stations STA that are communicating through a tunneled direct link setup (TDLS) link from one frequency band to another. A multiband element may be added to a TDLS discovery request and TDLS discovery response frames to allow each of the stations communications through a TDLS to determine if the other station has multiband capability. In one embodiment, a pairwise transient key (PTK) is created for both a current band in which the stations STA are communicating and a new band over which the stations may communicate in the future. In this way there is no need to calculate a new pairwise transient key PTK for the new frequency band.

主权项

1. A method of transferring a session using a fast session transfer (FST) setup protocol, the FST setup protocol comprising:
operating a first wireless device in a current session on a current frequency band; sending a request from the first wireless device to a second wireless device that is part of the current session, the request containing capability information including MAC address, BSSID, quality of service, high throughput, very high throughput, and security capability for a new frequency band; receiving a response from the second wireless device that is part of the current session, the response containing capability information including MAC address, BSSID, quality of service, high throughput, very high throughput, and security capability for the new frequency band; calculating a security key for the new frequency band using the capability information exchanged in the current band; sending operational information from the first wireless device to the second wireless device that is part of the current session, the operational information including quality of service, high throughput, and very high throughput information for operation in a new session in the new frequency band; and wherein the first wireless device in the current band is operable to perform the method of;
sending a switching request from the first wireless device to the second wireless device that is part of the current session, the switching request including the said operation information for operation of a new session in a new frequency band;receiving a switching response from the second wireless device, the switching response either,
accepting the new session defined by the operation information in the switching request, orrejecting the new session defined by the operation information in the switching request and providing the said capability information for the second wireless device in a new frequency band; andwhen the new session is rejected, sending a second switching request from the first wireless device to the second wireless device containing the said operation information corresponding to that received from the second wireless device in the switching response;receiving a second switching response from the second wireless device accepting the new session defined by the operation information in the second switching request; andestablishing the new session between the first and second wireless devices in the new frequency band.