Leveraging full duplex for rate adaptation in wireless LANs

Patent metadata

Field	Value
Publication number	US-9660793-B2
Application number	US-201514751945-A
Country	US
Kind code	B2
Filing date	Jun 26, 2015
Priority date	Jun 26, 2015
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

Techniques for presenting communication between two or more stations in a WLAN environment are provided. Specifically, methods are presented, that when taken alone or together, provide a device or group of devices with an efficient way for fast rate adaptation based on full duplex functionality, increasing link and network throughput. The present disclosure includes a method that provides a fast rate adaptation by leveraging full duplex in order to get immediate channel quality feedback.

First claim

The invention claimed is:

1. A wireless device, comprising:
a memory;
a transceiver, the transceiver configured to:
transmit a plurality of data frames; and
receive channel quality information, wherein the channel quality information is received during transmission of the plurality of data frames;

a processor and a rate selection module, the processor and the rate selection module configured to:
compute an updated data rate, wherein the updated data rate is determined at least based in part on the channel quality information received; and
terminate transmission of the plurality of data frames if the updated data rate provides an increase in throughput; and

the transceiver further configured to:
re-transmit the plurality of data frames; and
receive a block acknowledgement, and when the block acknowledgement occurs before a predetermined time, a Contention-Free End (CF-END) signal is sent.

2. The wireless device of claim 1 , wherein the data frames are an Aggregate-Media Access Control Protocol Data Unit (A-MPDU).

3. The wireless device of claim 1 , wherein the channel quality information is received during a full duplex communication.

4. The wireless device of claim 1 , wherein at least one of the plurality of data frames does not include payload information.

5. The wireless device of claim 1 , wherein the channel quality information includes a receiver identification.

6. The wireless device of claim 1 , wherein the channel quality information includes correct packet receipt identification.

7. The wireless device of claim 1 , wherein the updated data rate can be faster or slower than an actual transmission rate.

8. The wireless device of claim 1 , wherein receipt of the block acknowledgement occurs before a predetermined time.

9. The wireless device of claim 8 , wherein after checking for a time remaining in the transmission as indicated in a PHY Header and established by a NAV, if the block acknowledgement occurs before the predetermined time, the Contention-Free End (CF-END) signal is sent.

10. The wireless device of claim 9 , wherein the CF-END signal alerts the network the medium is available for contention.

11. The wireless device of claim 1 , further comprising determining not to terminate transmission if the updated data rate does not provide an increase throughput.

12. A method comprising:
transmitting, by a transceiver, a plurality of data frames;
receiving, by the transceiver, channel quality information, wherein the channel quality information is received during transmission of the plurality of data frames;
computing, by a rate selection module, an updated data rate, wherein the updated data rate is determined at least based in part on the channel quality information received;
determining, by the rate selection module, to terminate transmission if the updated data rate provides an increase in throughput;
re-transmitting, by the transceiver, the plurality of data frames; and
receiving, by the transceiver, a block acknowledgement, and when the block acknowledgment occurs before a predetermined time, a Contention-Free End (CF-END) signal is sent.

13. The method of claim 12 , wherein the data frames are an Aggregate-Media Access Control Protocol Data Unit (A-MPDU).

14. The method of claim 12 , wherein the channel quality information is received during a full duplex communication.

15. The method of claim 12 , wherein at least one of the plurality of data frames does not include payload information.

16. The method of claim 12 , wherein the channel quality information includes correct packet receipt identification.

17. The method of claim 12 , wherein the updated data rate can be faster or slower than an actual transmission rate.

18. The method of claim 12 , wherein receipt of the block acknowledgement occurs before a predetermined time, and/or wherein after checking for a time remaining in the transmission as indicated in a PHY Header and established by a NAV, if the block acknowledgement occurs before the predetermined time, the Contention-Free End (CF-END) signal is sent, and/or wherein the CF-END signal alerts the network the medium is available for contention.

19. The method of claim 12 , further comprising determining not to terminate transmission if the updated data rate does not provide an increase throughput.

20. A non-transitory computer readable medium having instructions thereon that when executed by at least one processor of a wireless device perform a method comprising:
transmitting, by a transceiver, a plurality of data frames;
receiving, by the transceiver, channel quality information, wherein the channel quality information is received during transmission of the plurality of data frames;
computing, by a rate selection module, an updated data rate, wherein the updated data rate is determined at least based in part on the channel quality information received;
determining, by the rate selection module, to terminate transmission if the updated data rate provides an increase in throughput;
re-transmitting, by the transceiver, the plurality of data frames; and
receiving, by the transceiver, a block acknowledgement, and when the block acknowledgement occurs before a predetermined time, a Contention-Free End (CF-END) signal is sent.

21. The non-transitory medium of claim 20 , wherein the data frames are an Aggregate-Media Access Control Protocol Data Unit (A-MPDU).

22. The non-transitory medium of claim 20 , wherein the channel quality information is received during a full duplex communication.

23. The non-transitory medium of claim 20 , wherein at least one of the plurality of data frames does not include payload information.

24. The non-transitory medium of claim 20 , wherein receipt of the block acknowledgement occurs before a predetermined time, and/or wherein after checking for a time remaining in the transmission as indicated in a PHY Header and established by a NAV, if the block acknowledgement occurs before the predetermined time, the Contention-Free End (CF-END) signal is sent, and/or wherein the CF-END signal alerts the network the medium is available for contention.

25. The non-transitory medium of claim 20 , further comprising determining not to terminate transmission if the updated data rate does not provide an increase throughput.

Assignees

• Intel Corp

Inventors

• Aryafar Ehsan
• Wang Ping
• Huang Po-Kai
• Talwar Shilpa

Classifications

• H04W28/0268

  using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24) · CPC title

• H04L5/0055

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04L5/14 Primary

  Two-way operation using the same type of signal, i.e. duplex · CPC title

• H04L1/0002 Primary

  by adapting the transmission rate · CPC title