Techniques for fast delivery of radio information

Patent metadata

Field	Value
Publication number	US-9622189-B2
Application number	US-201514670389-A
Country	US
Kind code	B2
Filing date	Mar 26, 2015
Priority date	Mar 28, 2014
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A transmitting wireless device provides channel access information to a receiving wireless device for the receiving wireless device to make a determination of when to transmit and what transmissions parameters to use for the transmission. The channel access information may be used differently by wireless devices operating in a basic service set and an overlapping basic service set. Channel access information may include fields indicative of transmission power used, signal to noise ratio headroom available, and so on. Channel access information may be generated and transmitted at the PHY layer of an implementation, thus providing a fast delivery to the receiving wireless device.

First claim

What is claimed is what is described and illustrated, including:

1. A method of wireless communication, comprising:
performing, by a wireless communication device, an interference measurement of a wireless transmission medium; and
performing a current wireless transmission that includes channel assessment information, wherein the information includes one or both of:
(a) a transmit power used for the current wireless transmission;
(b) an operating value indicative of whether the wireless communication device is operating in a basic service set or an overlapped basic service set; and
(c) an estimation of Signal to Interference and Noise Ratio (SINR) over an interference level based on at least the interference measurement, the operating value, and a threshold value for a clear channel assessment to indicate a channel quality that allows a new transmission to overlap at least partially with an existing transmission.

2. The method of claim 1 , further including:
determining the information at a PHY layer of the wireless communication device.

3. The method of claim 1 , wherein the information is usable by a receiving node in performing the clear channel assessment.

4. The method of claim 1 , wherein the information is usable by a receiving node in performing a transmit power control in the new transmission over the current transmission.

5. The method of claim 1 , wherein the information is usable by a receiving node in performing a modulation and coding scheme control in the new transmission over the current transmission.

6. The method of claim 1 , wherein the threshold value for the clear channel assessment changes based on a channel bandwidth.

7. A wireless communication apparatus, comprising:
a memory that stores executable instructions; and
a processor that reads the executable instructions from the memory and controls one or more modules of the wireless communication apparatus to:
perform an interference measurement of a wireless transmission medium; and
perform a current wireless transmission that includes channel assessment information, wherein the information includes one or both of:
(a) a transmit power used for the current wireless transmission;
(b) an operating value indicative of whether the wireless communication device is operating in a basic service set or an overlapped basic service set; and
(c) an estimation of Signal to Interference and Noise Ratio (SINR) over an interference level based on at least the interference measurement, the operating value, and a threshold value for a clear channel assessment to indicate a channel quality that allows a new transmission to overlap at least partially with an existing transmission.

8. The apparatus of claim 7 , wherein the processor further controls a module of the wireless communication apparatus to:
determine the information at a PHY layer of the wireless communication device.

9. The apparatus of claim 7 , wherein the information is usable by a receiving node in performing the clear channel assessment.

10. The apparatus of claim 7 , wherein the information is usable by a receiving node in performing a transmit power control in the new transmission over the current transmission.

11. The apparatus of claim 7 , wherein the information is usable by a receiving node in performing a modulation and coding scheme control in the new transmission over the current transmission.

12. The apparatus of claim 7 , wherein the threshold value for the clear channel assessment changes based on a channel bandwidth.

13. A wireless communication system comprising:
a first wireless device that:
performs an interference measurement of a wireless transmission medium; and
performs a wireless transmission that includes channel assessment information, wherein the information includes one or both of:
(a) a transmit power used for the wireless transmission;
(b) an operating value indicative of whether the wireless communication device is operating in a basic service set or an overlapped basic service set; and
(c) an estimation of Signal to Interference and Noise Ratio (SINR) over an interference level based on at least the interference measurement, the operating value, and a threshold value for a clear channel assessment to indicate a channel quality that allows a new transmission to overlap at least partially with an existing transmission; and
a second wireless device that:
receives the channel assessment information; and
adjusts, based on the channel assessment information, the threshold value for future use for the clear channel assessment.

14. The wireless communication system of claim 13 , wherein the first wireless device determines the channel assessment information at PHY layer of the first wireless device.

15. The system of claim 13 , wherein the threshold value for the clear channel assessment changes based on a channel bandwidth.

Assignees

• Zte Corp

Inventors

• Fang Yonggang
• Sun Bo
• Jiang Anming
• Li Nan
• Lv Kaiying

Classifications

• H04W72/542

  using measured or perceived quality · CPC title

• H04W52/241 Primary

  taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo · CPC title

• H04W40/16

  based on interference · CPC title

• H04W72/085

  Electricity · mapped topic

• H04W52/243

  taking into account interferences · CPC title