CN-113825222-B - Apparatus and method for coordinated spatial reuse in wireless communication

Abstract

A wireless communication method performed by a first apparatus includes obtaining a transmission opportunity (TXOP) to transmit or receive a first physical layer protocol data unit (PPDU), identifying a second apparatus for sharing the TXOP, allowing at least one of transmission and reception of the second PPDU to the second apparatus in the shared TXOP, and transmitting or receiving the first PPDU to or from at least one third apparatus in the shared TXOP.

Inventors

• HAN ZONGXUN
• ZHENG ZHEHAO
• Saran naribole
• Srinivas Candala

Assignees

• 三星电子株式会社

Dates

Publication Date

20260505

Application Date

20210618

Priority Date

20210218

Claims (17)

1. 1. A method of wireless communication performed by a first device, the method comprising: Acquiring a transmission opportunity TXOP for transmitting or receiving a first physical layer protocol data unit (PPDU); identifying a second means for sharing the TXOP; Acquiring first information about a first path loss between the first device and at least one third device receiving or transmitting the first PPDU; Determining a tolerable interference limit based on the first path loss and a minimum signal to interference ratio of the first device; allowing sharing of at least one of transmission and reception of a second PPDU to the second device in a TXOP, and Transmitting or receiving the first PPDU to or from the at least one third apparatus in the shared TXOP, Wherein allowing at least one of transmission and reception of the second PPDU includes allowing reception of the second PPDU, and Wherein allowing reception of the second PPDU includes providing a tolerable interference limit for transmission or reception of the first PPDU to the second device.
2. 2. The method of claim 1, wherein allowing at least one of transmission and reception of the second PPDU comprises providing information to the second device indicating the allowed transmission and/or the allowed reception of the second PPDU.
3. 3. The method of claim 1, wherein allowing at least one of transmission and reception of the second PPDU comprises allowing transmission of the second PPDU, and Wherein allowing transmission of the second PPDU includes providing a transmit power limit for transmission of the second PPDU to the second device.
4. 4. A method according to claim 3, further comprising: acquiring second information about at least one second path loss, and The transmit power limit is determined based on the at least one second path loss.
5. 5. The method of claim 4, wherein obtaining second information about the at least one second path loss comprises receiving information about a third path loss between the first apparatus and one of the at least one third apparatus from the one of the at least one third apparatus, and Information is received from the second device regarding a fourth path loss between the second device and the one of the at least one third device.
6. 6. The method of claim 4, wherein obtaining second information about the at least one second path loss comprises receiving information about a third path loss between the first apparatus and one of the at least one third apparatus from the one of the at least one third apparatus, and A fourth path loss between the first device and the second device is determined based on the frame received from the second device.
7. 7. The method of claim 6, wherein determining the fourth path loss comprises extracting transmission power information from the frame; measuring the received power of the frame, and The fourth path loss is calculated based on the transmission power information and the measured received power.
8. 8. The method of claim 1, wherein obtaining first information regarding the first path loss comprises receiving information regarding a second path loss between the first apparatus and one of the at least one third apparatus from the one of the at least one third apparatus, and Wherein determining the tolerable interference limit is based on a transmission power of the first PPDU, the second path loss, and the minimum signal-to-interference ratio.
9. 9. The method of claim 1, wherein allowing at least one of transmission and reception of the second PPDU comprises allowing transmission of only the second PPDU.
10. 10. The method of claim 1, wherein allowing at least one of transmission and reception of the second PPDU comprises transmitting an announcement frame to the second device.
11. 11. The method of claim 10, wherein the advertisement frame includes information included in a trigger frame for reception of the first PPDU when the TXOP is obtained to receive the first PPDU, and The transmission of the trigger frame to the at least one third device is omitted.
12. 12. The method of claim 10, further comprising: When the TXOP is obtained to receive the first PPDU, transmitting a trigger frame to the at least one third apparatus, Wherein the announcement frame and the trigger frame are aggregated in one PPDU.
13. 13. A method of wireless communication performed by a second device sharing a transmit opportunity, TXOP, with a first device, the method comprising: Receiving permission to coordinate spatial reuse from the first device that acquired the TXOP that sent or received a first physical layer protocol data unit, PPDU; Identifying at least one of transmission and reception of a second PPDU based on the allowing of coordinated spatial reuse; transmitting the second PPDU to or receiving the second PPDU from one of at least one third apparatus in a shared TXOP; receiving a tolerable interference limit for transmission or reception of the first PPDU from the first device, wherein the tolerable interference limit is determined based on a first path loss between the first device and another of the at least one third device receiving or transmitting the first PPDU and a minimum signal-to-interference ratio of the first device, and When reception of the second PPDU is identified, limiting transmission power of the one of the at least one third device based on the tolerable interference limit and at least one path loss associated with the first device.
14. 14. The method of claim 13, further comprising: a transmit power limit for the transmission of the second PPDU is received from the first device, Wherein the transmitting or receiving of the second PPDU includes transmitting the second PPDU to the one of the at least one third device at a transmission power approximately equal to or less than the transmission power limit.
15. 15. The method of claim 13, further comprising: Receiving at least one PPDU from the first device and at least one device associated with the first device, and The transmission power of the one of the at least one third device is limited based on the received power of the at least one PPDU.
16. 16. A wireless communication method performed by a third device associated with a second device in a transmit opportunity, TXOP, shared by a first device and a second device, the method comprising: Receiving a frame from the first device; determining a second path loss between the first device and the third device based on the frame; transmitting information about said second path loss to said second device, and Receiving a second physical layer protocol data unit, PPDU, from the second device in a shared TXOP, or transmitting the second PPDU to the second device, Wherein receiving or transmitting the second PPDU is controlled by the second apparatus based on the second path loss and a tolerable interference limit for transmission or reception of the first PPDU by the first apparatus provided from the first apparatus to the second apparatus, wherein the tolerable interference limit is determined based on a first path loss between the first apparatus and a fourth apparatus receiving or transmitting the first PPDU and a minimum signal-to-interference ratio of the first apparatus.
17. 17. The method of claim 16, wherein determining the second path loss comprises: Extracting transmission power information from the frame; measuring the received power of the frame, and The second path loss is calculated based on the transmission power information and the measured received power.

Description

Apparatus and method for coordinated spatial reuse in wireless communication Cross Reference to Related Applications The present application is based on and claims priority from U.S. provisional patent application No.63/041,284, filed on even 19/6/2020, and Korean patent application No.10-2021-0022026 filed on 18/2/2021, the disclosures of which are incorporated herein by reference in their entireties. Technical Field Example embodiments of the inventive concepts relate to wireless communications, and in particular, to an apparatus and method for coordinated spatial reuse in wireless communications. Background As an example of wireless communication, a Wireless Local Area Network (WLAN) is a technology of connecting two or more devices to each other using a wireless signal transmission method. WLAN technology may be based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard. The 802.11 standards have evolved into 802.11b, 802.11a, 802.11g, 802.11n, 802.11ac, and 802.11ax, and can support transmission speeds up to 1 gigabyte/second based on Orthogonal Frequency Division Multiplexing (OFDM) techniques. In 802.11ac, data may be transmitted simultaneously to multiple users through multi-user multiple-input multiple-output (MU-MIMO) techniques. In 802.11ax, also known as High Efficiency (HE), MU-MIMO and Orthogonal Frequency Division Multiple Access (OFDMA) techniques are applied to divide and provide users with usable subcarriers, thereby implementing multiple access. Thus, the WLAN system to which the 802.11ax is applied can efficiently support communication in dense areas and outdoors. 802.11Be, also known as Extremely High Throughput (EHT), is intended to implement support for the 6GHz unlicensed band, utilization of a maximum of 320MHz bandwidth per channel, introduction of hybrid automatic repeat request (HARQ), support for a maximum of 16x16 MIMO, and the like. The next generation WLAN system is expected to efficiently support low delay and ultra high speed transmission, such as New Radio (NR) as a 5G technology. Disclosure of Invention Embodiments of the inventive concept provide an apparatus and method for efficiently performing spatial reuse in wireless communication. According to an embodiment of the inventive concept, a wireless communication method performed by a first apparatus may include acquiring a transmission opportunity (TXOP) to transmit or receive a first physical layer protocol data unit (PPDU), identifying a second apparatus for sharing the TXOP, allowing at least one of transmission and reception of the second PPDU to the second apparatus in the shared TXOP, and transmitting the first PPDU to or receiving the first PPDU from at least one third apparatus in the shared TXOP. According to an embodiment of the inventive concept, a first apparatus for wireless communication may include a transceiver and a processing circuit. The processing circuit is configured to obtain a TXOP to transmit or receive a first PPDU through the transceiver, identify a second device for sharing the TXOP, allow at least one of transmission and reception of the second PPDU to the second device through the transceiver in the shared TXOP, and transmit the first PPDU to or receive the first PPDU from at least one third device through the transceiver in the shared TXOP. According to an embodiment of the inventive concept, a wireless communication method performed by a first apparatus may include obtaining a transmission opportunity (TXOP) to transmit or receive a first physical layer protocol data unit (PPDU), identifying a second apparatus to share the TXOP, providing a tolerable interference limit for transmission or reception of the first PPDU in the shared TXOP to the second apparatus, and transmitting the first PPDU to or receiving the first PPDU from at least one third apparatus in the shared TXOP. According to an embodiment of the inventive concept, a wireless communication method performed by a third apparatus associated with a second apparatus in a TXOP shared by the first apparatus and the second apparatus may include receiving a frame from the first apparatus, determining a path loss between the first apparatus and the third apparatus based on the frame, transmitting information about the path loss to the second apparatus, and receiving a physical layer protocol data unit (PPDU) in the shared TXOP or transmitting the PPDU to the second apparatus. Drawings The above and other features of the inventive concept will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: Fig. 1 is a diagram illustrating a wireless communication system according to an exemplary embodiment of the inventive concept; fig. 2 is a block diagram illustrating a wireless communication system according to an exemplary embodiment of the inventive concept; fig. 3A to 3D are diagrams illustrating a scenario of coordinated spatial reuse according