COMMUNICATION APPARATUS AND COMMUNICATION METHOD

• US 20190313328A1
• Filed: 11/01/2017
• Published: 10/10/2019
• Est. Priority Date: 12/20/2016
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: MA, YUELIN
• Granted Patent: US 11,026,167 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 17/327 Received signal code power [RSCP]
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A communication apparatus is provided that performs packet transmission at the time of detecting an interference signal. Each STA records a pair of a measurement result of an RSSI of an OBSS and a BSS Color, and reports, to an AP, BSS Colors that correspond to a maximum value and a minimum value of the RSSI. The AP generates a database or a table by using a STA having a minimum or maximum RSSI for each of the OBSS'"'"'s. When a signal of an OBSS is detected, the AP selects a STA that has the smallest RSSI of the OBSS or does not have the largest RSSI of the OBSS, and performs SR transmission. Alternatively, the AP measures angles of arrival of STAs and OBSS'"'"'s. When a signal of an OBSS is detected, the AP selects a STA that is most different in the angle of arrival from the OBSS or is not most similar in the angle of arrival to the OBSS, and performs SR transmission.

Claims

1. A communication apparatus comprising:

a communication unit that transmits or receives a signal;

an information obtaining unit that obtains information relating to interference that each transmission destination candidate receives from an interference source; and

a controller that selects each of the transmission destination candidates on a basis of the information when an interference signal arrives.

2. The communication apparatus according to claim 1,

wherein the controller identifies whether or not the interference signal has arrived from an overlapping basic service set (OBSS) on a basis of basic service set (BSS) identification information described in a PHY header of a received frame.

3. The communication apparatus according to claim 2,

wherein the BSS identification information includes a BSS Coloer defined by IEEE 802.11.

4. The communication apparatus according to claim 1,

wherein the communication apparatus operates as an access point, and

the information obtaining unit obtains the information relating to respective terminal stations serving as each of the transmission destination candidates in a local BSS and interference received from an OBSS serving as the interference source.

5. The communication apparatus according to claim 4,

wherein when a reception power of an OBSS signal serving as the interference signal is less than or equal to a prescribed threshold, the controller selects one of the respective terminal stations in the local BSS on a basis of the information, and causes the signal to be transmitted.

6. The communication apparatus according to claim 1,

wherein the controller selects a transmission destination candidate that the information indicates that is located farthest from the interference source that corresponds to the interference signal or is not located closest to the interference source.

7. The communication apparatus according to claim 1,

wherein the information obtaining unit obtains the information relating to an intensity of a received signal from the interference source of each of the transmission destination candidates, and

the controller selects each of the transmission destination candidates on a basis of the intensity of the received signal from the interference source that corresponds to the interference signal.

8. The communication apparatus according to claim 7,

wherein the controller selects a transmission destination candidate that the information indicates that has a lowest intensity of the received signal from the interference source that corresponds to the interference signal or does not have a highest intensity of the received signal from the interference source.

9. The communication apparatus according to claim 7,

wherein the information obtaining unit obtains the information on a basis of a report relating to the intensity of the received signal from the interference source, the report being transmitted from each of the transmission destination candidates.

10. The communication apparatus according to claim 7,

wherein the information obtaining unit obtains the information on a basis of a report relating to a measurement result of the intensity of the received signal from the interference source, the report being transmitted by each of the transmission destination candidates in response to a measurement request from a local station.

11. The communication apparatus according to claim 7,

wherein the communication apparatus operates as an access point,

the information obtaining unit obtains the information relating to the intensity of the received signal of an OBSS signal in each terminal station serving as each of the transmission destination candidates in a local BSS, and

the controller manages the information of each of the terminal stations in association with BSS identification information of an OBSS.

12. The communication apparatus according to claim 11,

wherein the information obtaining unit obtains, from each of the terminal stations, the information including the BSS identification information that indicates at least one of an OBSS having a maximum intensity of the received signal or an OBSS having a minimum intensity of the received signal.

13. The communication apparatus according to claim 1,

wherein the information obtaining unit obtains the information relating to an angle of arrival of each of the transmission destination candidates and the interference source, and

the controller selects each of the transmission destination candidates on a basis of a relationship of the angle of arrival between the interference source that corresponds to the interference signal and each of the transmission destination candidates.

14. The communication apparatus according to claim 13,

wherein the controller selects a transmission destination candidate that the information indicates that is most different in the angle of arrival from the interference source that corresponds to the interference signal or is not most similar in the angle of arrival to the interference source.

15. The communication apparatus according to claim 13,

wherein the communication unit includes a directional antenna, and

the information obtaining unit obtains the information relating to the angle of arrival on a basis of a result of receiving signals from each of the transmission destination candidates and the interference source by using the directional antenna.

16. The communication apparatus according to claim 13,

wherein the communication apparatus operates as an access point,

the information obtaining unit obtains the information relating to the angle of arrival of terminal stations serving as each of the transmission destination candidates in a local BSS and OBSS'"'"'s, and

the controller groups terminal stations and an OBSS that are similar in the angle of arrival into a cluster, and manages respective clusters in association with BSS identification information of each of the OBSS'"'"'s.

17. A communication method comprising:

an information obtaining step of obtaining information relating to interference that each transmission destination candidate receives from an interference source; and

a controlling step of selecting each of the transmission destination candidates on a basis of the information when an interference signal arrives.

18. A communication apparatus that operates under a control of an access point, the communication apparatus comprising:

a controller that performs control to transmit, to the access point, information relating to an intensity of a received signal of an OBSS signal.

19. The communication apparatus according to claim 18,

wherein the controller performs control to transmit, to the access point, the information that associates the intensity of the received signal of the OBSS signal with BSS identification information of an OBSS.

20. The communication apparatus according to claim 18,

wherein the controller performs control to transmit, to the access point, the information including BSS identification information that indicates at least one of an OBSS having a maximum intensity of the received signal or an OBSS having a minimum intensity of the received signal.

21. The communication apparatus according to claim 18,

wherein the controller causes a report frame to be transmitted to the access point in response to a request frame from the access point, the report frame including the information.