Resource allocation for uplink multi-user transmission in wlan

Patent metadata

Field	Value
Publication number	US-2017311289-A1
Application number	US-201715491912-A
Country	US
Kind code	A1
Filing date	Apr 19, 2017
Priority date	Apr 20, 2016
Publication date	Oct 26, 2017
Grant date	—

Abstract

Improved uplink multi-user (UL MU) resource allocation is proposed. For the UL MU scheduling information of trigger frame, N (N>1) bits indicate allocated resource unit (RU) in unit of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU and 996-tone RU in 80 MHz, and indicates the allocated RU in 80+80 MHz. The UL MU scheduling information of a multi-user request-to-send (MU-RTS) frame indicates an allocated channel corresponding to ‘242*M’-tone RU with a same bit pattern as the N bits of the first UL MU scheduling information, wherein ‘M’ is an integer greater than 0.

First claim

What is claimed is:

1 . A method for an AP (Access Point) to allocate radio resource to multiple STAs (stations) for uplink (UL) transmission in a wireless local area network (WLAN), the method comprising:
transmitting a trigger frame including first uplink multi-user (UL MU) scheduling information, wherein the first UL MU scheduling information includes N (N>1) bits indicating allocated resource unit (RU) in unit of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU and 996-tone RU in 80 MHz, and indicates the allocated RU in 80+80 MHz; receiving one or more trigger-based PPDUs (Physical Protocol Data Units) based on the first UL MU scheduling information; transmitting a multi-user request-to-send (MU-RTS) frame including second UL MU scheduling information, wherein the second UL MU scheduling information indicates an allocated channel corresponding to ‘242*M’-tone RU with a same bit pattern as the N bits of the first UL MU scheduling information, wherein ‘M’ is an integer greater than 0; and receiving one or more clear to send (CTS) frames based on the second UL MU scheduling information.

2 . The method of claim 1 , wherein the MU-RTS is transmitted to the multiple STAs soliciting simultaneous CTS frames from the multiple STAs.

3 . The method of claim 1 , wherein the second UL MU scheduling information indicates the allocated channel corresponding to ‘242*M’-tone RU with the same bit pattern as the N bits of the first UL MU scheduling information allocates the allocated RU equal to or greater than 242-tone RU.

4 . The method of claim 1 , wherein the first UL MU scheduling information includes a first bit indicating whether allocated resource unit (RU) is located in a primary 80 MHz or non-primary 80 MHz, and the N bits subsequent to the first bit.

5 . The method of claim 4 , wherein a length of the N bits of the first UL MU scheduling information is 7 bits.

6 . The method of claim 5 , wherein the second UL MU scheduling information indicates 4 different allocated channels corresponding to 242-tone RU with the same bit pattern as the N bits of the first UL MU scheduling information.

7 . The method of claim 5 , wherein the second UL MU scheduling information indicates 2 different allocated channels corresponding to 484-tone RU with the same bit pattern as the N bits of the first UL MU scheduling information.

8 . The method of claim 1 , wherein the second UL MU scheduling information further indicates a location of a primary channel in a frequency domain.

9 . The method of claim 1 , wherein the first and the second UL MU scheduling information are included in user-information fields of the trigger frame and the MU-RTS frame, respectively.

10 . A method for a STA (station) to transmit uplink multi-user (UL MU) signal to an access point (AP) in a wireless local area network (WLAN), the method comprising:
receiving a trigger frame including first UL MU scheduling information, wherein the first UL MU scheduling information includes N (N>1) bits indicating allocated resource unit (RU) in unit of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU and 996-tone RU in 80 MHz, and indicates the allocated RU in 80+80 MHz; transmitting a trigger-based PPDU (Physical Protocol Data Unit) based on the first UL MU scheduling information; receiving a multi-user request-to-send (MU-RTS) frame including second UL MU scheduling information, wherein the second UL MU scheduling information indicates an allocated channel corresponding to ‘242*M’-tone RU with a same bit pattern as the N bits of the first UL MU scheduling information, wherein ‘M’ is an integer greater than 0; and transmitting a clear to send (CTS) frame based on the second UL MU scheduling information.

11 . An AP (Access Point) allocating radio resource to multiple STAs (stations) for uplink (UL) transmission in a wireless local area network (WLAN), the AP comprising:
a transceiver configured to transmit a trigger frame including first uplink multi-user (UL MU) scheduling information and a multi-user request-to-send (MU-RTS) frame including second UL MU scheduling information to the STAs, and to receive one or more trigger-based PPDUs (Physical Protocol Data Units) based on the first UL MU scheduling information and one or more clear to send (CTS) frames based on the second UL MU scheduling information from the STAs; and a processor configured to prepare the first and the second UL MU scheduling information, wherein the first UL MU scheduling information includes N (N>1) bits indicating allocated resource unit (RU) in unit of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU and 996-tone RU in 80 MHz, and indicates the allocated RU in 80+80 MHz, wherein the second UL MU scheduling information indicates an allocated channel corresponding to ‘242*M’-tone RU with a same bit pattern as the N bits of the first UL MU scheduling information, and wherein ‘M’ is an integer greater than 0.

12 . A STA (station) transmitting uplink multi-user (UL MU) signal to an access point (AP) in a wireless local area network (WLAN), the STA comprising:
a transceiver configured to receive a trigger frame including first uplink multi-user (UL MU) scheduling information and a multi-user request-to-send (MU-RTS) frame including second UL MU scheduling information from the AP, and to transmit a trigger-based PPDU (Physical Protocol Data Unit) based on the first UL MU scheduling information and a clear to send (CTS) frame based on the second UL MU scheduling information from the STAs; and a processor configured to process the first and the second UL MU scheduling information, wherein the first UL MU scheduling information includes N (N>1) bits indicating allocated resource unit (RU) in unit of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU and 996-tone RU in 80 MHz, and indicates the allocated RU in 80+80 MHz, wherein the second UL MU scheduling information indicates an allocated channel corresponding to ‘242*M’-tone RU with a same bit pattern as the N bits of the first UL MU scheduling information, and wherein ‘M’ is an integer greater than 0.

Assignees

• Lg Electronics Inc

Inventors

• Kim Jeongki
• Ryu Kiseon
• Cho Hangyu

Classifications

• H04W72/1268

  of uplink data flows · CPC title

• H04L5/0091

  Signalling for the administration of the divided path, e.g. signalling of configuration information · CPC title

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title

• H04W74/0816 Primary

  with collision avoidance · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title