Protocols for flexible channel utilization
In some aspects, the disclosure is directed to methods and systems for utilizing protocols to enable two 802.11 devices to exchange their dynamically-changing local channel availability table and form a mutual channel availability table with time, frequency, and transmission rate domains available. This table may be used to make optimum opportunistic use of link resources by adapting packet duration, frequency utilization and transmission rate to channel conditions.
1. A system for flexible channel utilization, comprising:
transmission circuitry of a first wireless device configured to transmit a local channel availability table of the first wireless device to a second wireless device;
reception circuitry of the first wireless device configured to receive a second local channel availability table of the second wireless device, transmitted responsive to receipt of the first local channel availability table of the first wireless device;
comparator circuitry configured to determine transmission parameters for communications with the second device via a combination of the first local channel availability table and the second local channel availability table by identifying a first intersection between a set of preferred transmission channels of the first wireless device and a set of preferred reception channels of the second wireless device; and a second intersection between a set of preferred reception channels of the first wireless device and a set of preferred transmission channels of the second wireless device; and
wherein the transmission circuitry and reception circuitry are configured to communicate data between the first wireless device and the second wireless device according to the determined transmission parameters from the combination of the first local channel availability table and the second local channel availability table.
2. The system of claim 1 , wherein the transmission circuitry is further configured to transmit the first local channel availability in a header of a handshaking request.
3. The system of claim 1 , wherein the transmission circuitry is further configured to subsequently transmit an updated local channel availability table of the first wireless device.
4. The system of claim 3 , wherein the transmission circuitry is further configured to transmit the updated local channel availability table of the first wireless device in response to a ready-to-send message from the second wireless device.
5. The system of claim 3 , wherein the transmission circuitry is further configured to transmit the updated local channel availability table of the first wireless device via a control frame.
6. The system of claim 1 , wherein the system further comprises a processor configured to calculate, for each subband of a plurality of subbands, a score as a function of a maximum modulation and coding scheme and number of spatial streams supported on said subband, a duration said subband is estimated to be available, and a channel availability or interference seen on said subband; and
wherein the transmission circuitry is further configured to transmit the plurality of scores for the plurality of subbands to the second wireless device.
7. The system of claim 1 , wherein the reception circuitry is further configured to receive an updated local channel availability table of the second wireless device;
and wherein the comparator circuitry is further configured to determine updated transmission parameters for communications with the second device via the combination of the first local channel availability table and the updated local channel availability table from the second wireless device, the updated transmission parameters used for communicating data between the first wireless device and the second wireless device.
8. A system for flexible channel utilization, comprising:
transmission circuitry of a first wireless device configured to transmit a local channel availability table of the first wireless device to a second wireless device;
reception circuitry of the first wireless device configured to receive a second local channel availability table of the second wireless device, transmitted responsive to receipt of the first local channel availability table of the first wireless device;
comparator circuitry configured to determine transmission parameters for communications with the second device via a combination of the first local channel availability table and the second local channel availability table by identifying a first minimum of a duration for which a set of preferred transmission channels of the second wireless device is valid, and a duration for which a set of preferred reception channels of the first wireless device is valid; and identifying a second minimum of a duration for which a set of preferred reception channels of the second wireless device is valid, and a duration for which a set of preferred transmission channels of the first wireless device is valid; and
wherein the transmission circuitry and reception circuitry are configured to communicate data between the first wireless device and the second wireless device according to the determined transmission parameters from the combination of the first local channel availability table and the second local channel availability table.
9. The system of claim 8 , wherein the transmission circuitry is further configured to transmit the first local channel availability in a header of a handshaking request.
10. The system of claim 8 , wherein the transmission circuitry is further configured to subsequently transmit an updated local channel availability table of the first wireless device.
11. The system of claim 10 , wherein the transmission circuitry is further configured to transmit the updated local channel availability table of the first wireless device in response to a ready-to-send message from the second wireless device.
12. The system of claim 10 , wherein the transmission circuitry is further configured to transmit the updated local channel availability table of the first wireless device via a control frame.
13. The system of claim 8 , wherein the system further comprises a processor configured to calculate, for each subband of a plurality of subbands, a score as a function of a maximum modulation and coding scheme and number of spatial streams supported on said subband, a duration said subband is estimated to be available, and a channel availability or interference seen on said subband; and
wherein the transmission circuitry is further configured to transmit the plurality of scores for the plurality of subbands to the second wireless device.
14. The system of claim 8 , wherein the reception circuitry is further configured to receive an updated local channel availability table of the second wireless device;
and wherein the comparator circuitry is further configured to determine updated transmission parameters for communications with the second device via the combination of the first local channel availability table and the updated local channel availability table from the second wireless device, the updated transmission parameters used for communicating data between the first wireless device and the second wireless device.
15. A system for flexible channel utilization, comprising:
transmission circuitry of a first wireless device configured to transmit a local channel availability table of the first wireless device to a second wireless device;
reception circuitry of the first wireless device configured to receive a second local channel availability table of the second wireless device, transmitted responsive to receipt of the first local channel availability table of the first wireless device;
comparator circuitry configured to determine transmission parameters for communications with the second device via a combination of the first local channel availability table and the second local channel availability table by identifying a first minimum of a preferred modulation and coding scheme index for transmissions of the second wireless device, and a preferred modulation and coding scheme index for receptions of the first wireless device; and identifying a second minimum of a preferred modulation and coding scheme index for receptions of the second wireless device, and a preferred modulation and coding scheme index for transmissions of the first wireless device; and
wherein the transmission circuitry and reception circuitry are configured to communicate data between the first wireless device and the second wireless device according to the determined transmission parameters from the combination of the first local channel availability table and the second local channel availability table.
16. The system of claim 15 , wherein the transmission circuitry is further configured to transmit the first local channel availability in a header of a handshaking request.
17. The system of claim 15 , wherein the transmission circuitry is further configured to subsequently transmit an updated local channel availability table of the first wireless device.
18. The system of claim 17 , wherein the transmission circuitry is further configured to transmit the updated local channel availability table of the first wireless device in response to a ready-to-send message from the second wireless device.
19. The system of claim 15 , wherein the system further comprises a processor configured to calculate, for each subband of a plurality of subbands, a score as a function of a maximum modulation and coding scheme and number of spatial streams supported on said subband, a duration said subband is estimated to be available, and a channel availability or interference seen on said subband; and
wherein the transmission circuitry is further configured to transmit the plurality of scores for the plurality of subbands to the second wireless device.
20. The system of claim 15 , wherein the reception circuitry is further configured to receive an updated local channel availability table of the second wireless device;
and wherein the comparator circuitry is further configured to determine updated transmission parameters for communications with the second device via the combination of the first local channel availability table and the updated local channel availability table from the second wireless device, the updated transmission parameters used for communicating data between the first wireless device and the second wireless device.