Full duplex wireless communications on devices with limited echo cancellation capabilities

Patent metadata

Field	Value
Publication number	US-9503249-B2
Application number	US-201414335396-A
Country	US
Kind code	B2
Filing date	Jul 18, 2014
Priority date	Jul 18, 2014
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

Disclosed in some examples are methods, systems, and machine readable mediums which allow for wireless devices with limited echo cancellation capabilities to participate in full-duplex communications. In some examples, by carefully controlling transmission powers and the modulation and coding schemes (MCS) used in the transmissions, both devices can engage in full-duplex communication.

First claim

What is claimed is:

1. A non-transitory machine readable medium that stores instructions which when performed by a wireless device, cause the wireless device to perform operations for configuring a full duplex communication, the operations at least to:
determine a first echo cancellation parameter specific to the wireless device;
receive a second echo cancellation parameter from a controlled wireless device;
calculate a full duplex communication parameter, the full duplex communication parameter determined based upon the first and second echo cancellation parameters;
send the full duplex communication parameter to the controlled wireless device;
provide the controlled wireless device an indication of a time within a full duplex period at which one of: the wireless device or the controlled wireless device transitions from sending data packets to block acknowledgement packets; and
responsive to receiving the full duplex communication parameter, simultaneously transmitting packets to and receiving packets from the controlled wireless device using the full duplex communication parameter on the same wireless channel during the full duplex period,
wherein the wireless device is not capable of cancelling out interference from transmissions at maximum power to a level at or below a noise floor of a receiver of the wireless device and wherein the operations to calculate the full duplex communication parameter comprise operations to at least calculate the full duplex communication parameter to allow echo cancellation circuitry of the wireless device to cancel a transmission made by the wireless device and to allow echo cancellation circuitry of the controlled wireless device to cancel a transmission made by the controlled wireless device.

2. The non-transitory machine readable medium of claim 1 , wherein the full duplex communication parameter is a modulation and coding scheme (MCS) and wherein the operations to calculate the MCS comprise operations to at least calculate the MCS so as to prioritize a connection throughput between the wireless device and the controlled wireless device over a connection latency between the wireless device and the controlled wireless device.

3. The non-transitory machine readable medium of claim 1 , wherein the full duplex communication parameter is a modulation and coding scheme (MCS) and wherein the operations to calculate the MCS comprise operations to at least calculate the MCS so as to prioritize a connection latency between the wireless device and the controlled wireless device over a connection throughput between the wireless device and the controlled wireless device.

4. The non-transitory machine readable medium of claim 1 , wherein the second echo cancellation parameter is received in a Medium Access Control (MAC) management message and the full duplex communication parameter is sent in a MAC management message.

5. The non-transitory machine readable medium of claim 1 , wherein the first echo cancellation parameter is one of: an amount of echo cancellation the wireless device is capable of, a receiver noise figure, a maximum modulation and coding scheme (MCS), a measurement of the wireless medium, a transmission power, and a full-duplex period duration.

6. The non-transitory machine readable medium of claim 1 wherein the full duplex communication parameter is a modulation and coding scheme (MCS).

7. A wireless device comprising:
a memory and one or more processors configured to:
determine a first echo cancellation parameter specific to the wireless device;
receive a second echo cancellation parameter from a controlled wireless device;
calculate a full duplex communication parameter, the full duplex communication parameter determined based upon the first and second echo cancellation parameters;
send the full duplex communication parameter to the controlled wireless device;
provide the controlled wireless device an indication of a time within a full duplex period at which one of: the wireless device or the controlled wireless device transitions from sending data packets to block acknowledgement packets; and
responsive to receiving the full duplex communication parameter, cause a simultaneous transmission of packets to and receive packets from the controlled wireless device using the full duplex communication parameter on the same wireless channel during the full duplex period,
wherein the wireless device is not capable of cancelling out interference from transmissions at maximum power to a level at or below a noise floor of a receiver of the wireless device, and wherein the one or more processors are configured to calculate the full duplex communication parameter to allow echo cancellation circuitry of the wireless device to cancel a transmission made by the wireless device and to allow echo cancellation circuitry of the controlled wireless device to cancel a transmission made by the controlled wireless device.

8. The wireless device of claim 7 , wherein the one or more processors are configured to calculate a Modulation and Coding Scheme (MCS) so as to prioritize a connection throughput between the wireless device and the controlled wireless device over a connection latency between the wireless device and the controlled wireless device.

9. The wireless device of claim 7 , wherein the one or more processors are configured to calculate a Modulation and Coding Scheme (MCS) so as to prioritize a connection latency between the wireless device and the controlled wireless device over a connection throughput between the wireless device and the controlled wireless device.

10. The wireless device of claim 7 , comprising an antenna.

Assignees

• Intel Ip Corp

Inventors

• Tetzlaff Thomas A
• Perahia Eldad
• Stacey Robert J

Classifications

• H04L1/0009

  by adapting the channel coding (H04L1/1812 takes precedence) · CPC title

• H04L1/1635

  Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages · CPC title

• H04B7/015

  Reducing echo effects · CPC title

• H04L1/0018

  based on latency requirement · CPC title

• H04L5/1461 Primary

  Suppression of signals in the return path, i.e. bidirectional control circuits · CPC title