Wireless device, method, and computer readable media for spatial reuse for device-to-device links

• US 9,794,790 B2
• Filed: 06/22/2015
• Issued: 10/17/2017
• Est. Priority Date: 10/29/2014
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Huang, Po-Kai, Stacey, Robert J., Li, Qinghua, Yang, Rongzhen
• Primary Examiner(s): Shivers, Ashley
• Application Number:
  US14/745,743
• Publication Number:
  US 20160127909A1
• Time in Patent Office: 848 Days
• CPC Class Codes: H04L 27/261 Details of reference signals
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 28/0236 radio quality, e.g. interference, losses or delay
• CPC Class Codes: H04W 40/16 based on interference
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 84/20 Master-slave selection or change arrangements

Abstract

Methods, computer readable media, and apparatuses are disclosed for spatial reuse. A high efficiency station (HE STA) that includes circuitry is disclosed. The circuitry may be configured to: determine if a link with a wireless device is a D2D link with a spatial reuse opportunity; and transmit a packet that includes an indication that there is the spatial reuse opportunity for the duration of the packet, if the link with the wireless device is the D2D link with the spatial reuse opportunity. The circuitry may be configured to: receive a packet from a second HE STA, where the packet includes an indication that there is a spatial opportunity for the duration of the packet; adjust at least one of the following group: a transmit power and a clear channel assessment parameter; and transmit a second packet to a wireless device in the spatial opportunity in accordance with D2D communication.

Claims

1. An apparatus of a high efficiency station (HE STA), the HE STA configured to operate in a wireless local-area network (WLAN), the apparatus comprising:

a memory; and

circuitry coupled to the memory, the circuitry configured to;

determine if a link with a wireless device is a device-to-device (D2D) link with a spatial reuse opportunity; and

configure the HE STA to transmit a packet that includes an indication that there is the spatial reuse opportunity for the duration of the packet, if the link with the wireless device is the D2D link with the spatial reuse opportunity.

2. The apparatus of the HE STA of claim 1, wherein the indication includes a margin that indicates at least one of the following group:

an additional interference that can be tolerated by the HE STA, a tolerable interference level above a base threshold, and a tolerable interference level minus a transmission power.

3. The apparatus of the HE STA of claim 1, wherein the indication includes one of the following group:

an indication of a transmission power for a second HE STA to use in the spatial reuse opportunity and a tolerable interference level plus the transmission power of the HE STA.

4. The apparatus of the HE STA of claim 1, wherein the circuitry is further configured to determine the link with the wireless device is the D2D link with the spatial reuse opportunity based on a signal strength received from the wireless device and a transmission power of the wireless device.

5. The apparatus of the HE STA of claim 1, wherein the circuitry is further configured to determine the link with the wireless device is the D2D link with the spatial reuse opportunity based on a determination by the wireless device.

6. The apparatus of the HE STA of claim 1, wherein the indication that there is the spatial reuse opportunity is to be transmitted in a HE signal (SIG) preamble.

7. The apparatus of the HE STA of claim 1, wherein the circuitry is further configured to determine the link with the wireless device is the D2D link with the spatial reuse opportunity based on an indication of a signal strength received by the wireless device from the HE STA.

8. The apparatus of the HE STA of claim 1, wherein the wireless device is one from the following group:

a legacy device, a second HE STA, and a master station.

9. The apparatus of the HE STA of claim 1, wherein the circuitry is further configured to transmit and receive in accordance with orthogonal frequency division multiple access (OFDMA).

10. The apparatus of the HE STA of claim 9, wherein the circuitry is further configured to transmit on a sub-channel in accordance with OFDMA.

11. The apparatus of the HE STA of claim 9, wherein the circuitry is further configured to operate in accordance with Institute of Electrical and Electronic Engineering (IEEE) 802.11ax.

12. The apparatus of the HE STA of claim 1, wherein the circuitry is further configured to transmit an indication that the link with the wireless device is not the D2D link with the spatial reuse opportunity, if the link with the wireless device is not the D2D link with the spatial reuse opportunity.

13. The apparatus of the HE STA of claim 1, wherein the circuitry further comprises processing circuitry and transceiver circuitry.

14. The apparatus of the HE STA of claim 13, further comprising a transceiver coupled to the circuitry;

and,

one or more antennas coupled to the transceiver.

15. A method performed by an apparatus of a high efficiency station (HE STA), the HE STA configured to operate in a wireless local-area network (WLAN), the method comprising:

determining if a link with a wireless device is a device-to-device (D2D) link with a spatial reuse opportunity; and

transmitting a packet that includes an indication that there is the spatial reuse opportunity for the duration of the packet, if the link with the wireless device is the D2D link with the spatial reuse opportunity.

16. The method of claim 15, wherein the indication includes a margin that indicates at least one of the following group:

an additional interference that can be tolerated by the HE STA, a tolerable interference level above a base threshold, and a tolerable interference level minus a transmission power.

17. The method of claim 15, wherein the indication includes one of the following group:

an indication of a transmission power for a second HE STA to use in the spatial reuse opportunity and a tolerable interference level plus the transmission power of the HE STA.

18. The method of claim 15, wherein determining further comprises:

determining the link with the wireless device is the D2D link with the spatial reuse opportunity based on a signal strength received from the wireless device and a transmission power of the wireless device.

19. The method of claim 15, wherein determining further comprises:

determining the link with the wireless device is the D2D link with the spatial reuse opportunity based on an indication of a signal strength received by the wireless device from the HE STA.

20. An apparatus of a high efficiency station (HE STA), the HE STA configured to operate in a wireless local-area network (WLAN), the apparatus comprising:

memory; and

circuitry coupled to the memory, the circuitry configured to;

decode a first packet from a second HE STA, wherein the first packet includes an indication that there is a spatial opportunity for the duration of the packet;

adjust at least one of the following group;

a transmit power and a clear channel assessment; and

configure the HE STA to transmit a second packet to a wireless device in the spatial opportunity in accordance with device-to-device communication, wherein the first packet is received on a sub-channel and the second packet is to be transmitted on the same sub-channel, and wherein the circuitry is further configured to operate in accordance with orthogonal frequency division multiple access (OFDMA).

21. The apparatus of the HE STA of claim 20, wherein the indication includes an indication of how much additional interference the second HE STA can tolerate, and wherein the circuitry is further configured to reduce the transmit power of the HE STA based on the indication of how much additional interference the second HE STA can tolerate and further based on a signal strength of the first packet from the second HE STA.

22. The apparatus of the HE STA of claim 20, wherein the indication includes an indication of how much additional interference the second HE STA can tolerate, and wherein the circuitry is further configured to increase a signal detect level of the clear channel assessment based on the indication of how much additional interference the second HE STA can tolerate and further based on a signal strength of the first packet from the second HE STA, and wherein the circuitry is further configured to perform a mid-packet detect to determine if a wireless medium is busy.

23. The apparatus of the HE STA of claim 20, further comprising memory coupled to the circuitry, a transceiver coupled to the circuitry;

and

one or more antennas coupled to the transceiver.

24. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors to perform operations for device-to-device spatial reuse on an apparatus of a high efficiency station (HE STA), the HE STA configured to operate in a wireless local-area network (WLAN), the operations to configure the apparatus of the HE STA to:

determine if a link with a wireless device is a device-to-device (D2D) link with a spatial reuse opportunity; and

transmit a packet that includes an indication that there is the spatial reuse opportunity for the duration of the packet, if the link with the wireless device is the D2D link with the spatial reuse opportunity.

25. The non-transitory computer-readable storage medium of claim 24, wherein the indication includes at least one from the following group:

a margin that indicates an additional interference that can be tolerated by the HE STA, a margin that indicates a tolerable interference level above a base threshold, and an indication of a transmission power for a second HE STA to use in the spatial reuse opportunity.