Method for uplink multi-user transmission in wireless communication system and apparatus therefor

• US 10,128,925 B2
• Filed: 08/24/2015
• Issued: 11/13/2018
• Est. Priority Date: 08/22/2014
• Status: Expired

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chun, Jinyoung, Ryu, Kiseon, Lee, Wookbong, Choi, Jinsoo, Cho, Hangyu, Kim, Suhwook
• Primary Examiner(s): Kassa, Zewdu
• Application Number:
  US15/505,561
• Publication Number:
  US 20170272138A1
• Time in Patent Office: 1,177 Days
• Field of Search: 375267, 375260, 375259, 375316, 375219, 375295
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0613 using simultaneous transmission H04B7/0686 takes precedence
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04L 1/0031 Multiple signaling transmission H04L1/1664, F15 take precedence
• CPC Class Codes: H04L 1/0083 Formatting with frames or packets; Protocol or part of protocol for error control
• CPC Class Codes: H04L 1/0643 block codes
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 65/40 Support for services or applications
• CPC Class Codes: H04L 69/323 in the physical layer [OSI layer 1]
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal

Abstract

In the present invention, disclosed is a method for uplink multi-user transmission in a wireless communication system and an apparatus therefor. Specifically, a method for performing, by a station (STA), uplink (UL) multi-user (MU) transmission in a wireless communication system comprises the steps of: receiving, from an access point (AP), a trigger frame including information for UL MU transmission; and transmitting an UL MU PPDU on the basis of the information for UL MU transmission, wherein the trigger frame is a medium access control (MAC) frame, a MAC header of the trigger frame includes a type field and a subtype field, and the type of the trigger frame may be indicated by the type field and the subtype field.

Claims

1. A method for performing uplink (UL) multi-user (MU) transmission by a station (STA) in a wireless communication system, the method comprising:

receiving a Medium Access Control (MAC) frame from an access point (AP), the MAC frame comprising a MAC header, a frame body and a Frame Check Sequence (FCS), the MAC header including a field indicating whether a type of the MAC frame is a trigger frame; and

transmitting a UL frame in response to the MAC frame to the AP, when the type of the MAC frame is the trigger frame,

wherein the trigger frame includes information for the UL MU transmission and information indicating a type of the trigger frame,

wherein the type of the trigger frame includes a type for triggering transmission of UL MU data frames or a type for triggering transmission of buffer status report frames, and

wherein the UL frame is a UL MU data frame when the type of the trigger frame includes the type for triggering transmission of UL MU data frames.

2. The method of claim 1, wherein, when type of the trigger frame is for triggering transmission of the UL MU data frames, the trigger frame includes an association identifier (AID) for each of STA performing the UL MU transmission, space resource indication information for a UL MU frame of each STA identified by the AID and frequency resource indication information for the UL MU frame of each STA identified by the AID.

3. The method of claim 2, wherein the trigger frame further includes a modulation and coding scheme (MCS) level index of the UL MU frame of each STA identified by the AID and a coding type of the UL MU frame of each STA identified by the AID.

4. The method of claim 1, wherein, when the type of trigger frame is for triggering transmission of the buffer status report, the trigger frame includes an association identifier (AID) for each of STA performing the UL MU transmission, and the UL frame is a buffer status report frame.

5. The method of claim 1, wherein, when the type of the trigger frame is for triggering transmission of the UL MU data frames, the trigger frame further includes resource information of the UL MU frames.

6. The method of claim 5, wherein the UL MU frame is transmitted through a resource which the STA arbitrarily selects based on the resource information.

7. The method of claim 5, wherein the trigger frame further includes the information indicating whether the modulation and coding scheme (MCS) level index and the space time block coding (STBC) are applied to the UL MU frame, transmittable frequency resource indication information of the UL MU frame, and the length information of the UL MU frame.

8. A method for supporting uplink (UL) multi-user (MU) transmission by an access point (AP) in a wireless communication system, the method comprising:

transmitting a Medium Access Control (MAC) frame to a station (STA), the MAC frame comprising a MAC header, a frame body and a Frame Check Sequence (FCS), the MAC header including a field indicating whether a type of the MAC frame is a trigger frame; and

receiving a UL frame in response to the MAC frame to the AP, when the type of the MAC frame is the trigger frame,

wherein the trigger frame includes information for the UL MU transmission and information indicating a type of the trigger frame,

wherein the type of the trigger frame includes a type for triggering transmission of UL MU data frames or a type for triggering transmission of buffer status report frames, and

wherein the UL frame is a UL MU data frame when the type of the trigger frame includes the type for triggering transmission of UL MU data frames.

13. The method of claim 8, wherein, when the type of trigger frame is for triggering transmission of the buffer status report, the trigger frame includes an association identifier (AID) for each of STA performing the UL MU transmission.

9. A station (STA) device for performing uplink (UL) multi-user (MU) transmission in a wireless communication system, the station device comprising:

a radio frequency (RF) unit, including a transceiver, for transmitting and receiving a wireless signal; and

a processor,

wherein the processor is configured to;

receive a Medium Access Control (MAC) frame from an access point (AP), the MAC frame comprising a MAC header, a frame body and a Frame Check Sequence (FCS), the MAC header including a field indicating whether a type of the MAC frame is a trigger frame; and

transmit a UL frame in response to the MAC frame to the AP, when the type of the MAC frame is the trigger frame,

wherein the trigger frame includes information for the UL MU transmission and information indicating a type of the trigger frame,

wherein the type of the trigger frame includes a type for triggering transmission of UL MU data frames or a type for triggering transmission of buffer status report frames, and

wherein the UL frame is a UL MU data frame when the type of the trigger frame includes the type for triggering transmission of UL MU data frames.

10. The station device of claim 9, wherein, when the type of the trigger frame is for triggering transmission of the UL MU data frames, the trigger frame includes an association identifier (AID) for each of STA performing the UL MU transmission, space resource indication information for a UL MU frame of each STA identified by the AID and frequency resource indication information for the UL MU frame of each STA identified by the AID.

11. The station device of claim 10, wherein the trigger frame further includes a modulation and coding scheme (MCS) level index of the UL MU frame of each STA identified by the AID and a coding type of the UL MU frame of each STA identified by the AID.

12. The station device of claim 9, wherein, when the type of trigger frame is for triggering transmission of the buffer status report, the trigger frame includes an association identifier (AID) for each of STA performing the UL MU transmission.