Method and apparatus for transmitting and receiving block ack in wireless LAN system

Patent metadata

Field	Value
Publication number	US-12278705-B2
Application number	US-202017774096-A
Country	US
Kind code	B2
Filing date	Nov 3, 2020
Priority date	Nov 4, 2019
Publication date	Apr 15, 2025
Grant date	Apr 15, 2025

Abstract

A method and apparatus for transmitting and receiving a block acknowledgement (ACK) in a wireless local area network (LAN) system are disclosed. An operation method for a first communication node comprises the steps of: generating a first data frame including first add block acknowledgment (ADDBA) information; transmitting the first data frame to a second communication node; and receiving, from the second communication node, a first receiver address (RA) including second ADDBA information generated by the second communication node in response to the first data frame.

First claim

The invention claimed is:

1. An operation method of a first communication node in a wireless local area network (LAN) system, the operation method comprising:
generating a first data frame including first add block acknowledgment (ADDBA) information;
transmitting the first data frame to a second communication node;
receiving, from the second communication node, a first block acknowledgment (BA) including second ADDBA information generated by the second communication node in response to the first data frame;
transmitting, to the second communication node, a second data frame not including the first ADDBA information in a same BA session as the first data frame; and
receiving, from the second communication node, a second BA not including the second ADDBA information in response to the second data frame,
wherein a transmission/reception operation of the first data frame is performed without a BA agreement operation between the first communication node and the second communication node.

2. The operation method according to claim 1 , wherein the first ADDBA information includes at least one of information indicating a BA timeout value, information indicating a buffer size, information indicating a fragment number, information indicating a starting sequence number, information of a sequence number bitmap, or a combination thereof.

3. The operation method according to claim 2 , wherein the buffer size indicates a maximum number of medium access control (MAC) protocol data units (MPDUs) transmittable in a BA session started by the first data frame.

4. The operation method according to claim 1 , wherein the second ADDBA information includes at least one of information indicating a BA timeout value, information indicating a buffer size, or a combination thereof.

5. The operation method according to claim 1 , wherein the first data frame includes one or more MPDUs, and a number of the one or more MPDUs is determined in consideration of a buffer size of the second communication node.

6. The operation method according to claim 1 , wherein when the first data frame includes a plurality of MPDUs, the first ADDBA information is included in a first MPDU among the plurality of MPDUs.

7. The operation method according to claim 1 , further comprising receiving, from the second communication node, a frame including information indicating a buffer size of the second communication node before transmitting the first data frame, wherein a number of one or more MPDUs included in the first data frame is determined based on the buffer size.

8. The operation method according to claim 1 , wherein a number of one or more MPDUs included in the second data frame is determined based on a buffer size determined through exchanging of the first data frame and the first BA.

9. An operation method of a second communication node in a wireless local area network (LAN) system, the operation method comprising:
receiving, from a first communication node, a first data frame including first add block acknowledgment (ADDBA) information;
generating second ADDBA information in consideration of the first ADDBA information;
transmitting, to the first communication node, a block acknowledgment (BA) including the second ADDBA information in response to the first data frame;
receiving, from the first communication node, a second data frame not including the first ADDBA information in a same BA session as the first data frame; and
transmitting, to the first communication node, a second BA not including the second ADDBA information in response to the second data frame,
wherein a transmission/reception operation of the first data frame is performed without a BA agreement operation between the first communication node and the second communication node.

10. The operation method according to claim 9 , wherein the first ADDBA information includes at least one of information indicating a BA timeout value, information indicating a buffer size, information indicating a fragment number, information indicating a starting sequence number, information of a sequence number bitmap, or a combination thereof.

11. The operation method according to claim 9 , wherein the second ADDBA information includes at least one of information indicating a BA timeout value, information indicating a buffer size, or a combination thereof.

12. The operation method according to claim 9 , wherein the first data frame includes one or more medium access control (MAC) protocol data units (MPDUs), a number of the one or more MPDUs is determined in consideration of a buffer size of the second communication node, and the first ADDBA information is included in a first MPDU among the plurality of MPDUs.

13. The operation method according to claim 9 , further comprising transmitting a frame including information indicating a buffer size of the second communication node before receiving the first data frame, wherein a number of one or more MPDUs included in the first data frame is determined based on the buffer size.

14. A first communication node in a wireless local area network (LAN) system, the first communication node comprising:
a processor; and
a memory storing one or more instructions executable by the processor;
wherein the one or more instructions are executed to:
generate a first data frame including first add block acknowledgment (ADDBA) information;
transmit the first data frame to a second communication node;
receive, from the second communication node, a first block acknowledgment (BA) including second ADDBA information generated by the second communication node in response to the first data frame;
transmit, to the second communication node, a second data frame not including the first ADDBA information in a same BA session as the first data frame; and
receive, from the second communication node, a second BA not including the second ADDBA information in response to the second data frame,
wherein a transmission/reception operation of the first data frame is performed without a BA agreement operation between the first communication node and the second communication node.

15. The first communication node according to claim 14 , wherein the first data frame includes one or more medium access control (MAC) protocol data units (MPDUs), a number of the one or more MPDUs is determined in consideration of a buffer size of the second communication node, and the first ADDBA information is included in a first MPDU among the one or more MPDUs.

16. The first communication node according to claim 14 , wherein the one or more instructions are further executed to receive, from the second communication node, a frame including information indicating a buffer size of the second communication node before transmitting the first data frame, wherein a number of one or more MPDUs included in the first data frame is determined based on the buffer size.

17. The first communication node according to claim 14 , wherein a number of one or more MPDUs included in the second data frame is determined based on a buffer size determined through exchanging of the first data frame and the first BA.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Korea National Univ Of Transportation Industry Academic Cooperation Foundation
• Korea National Univ Of Transportation Industry—Academic Cooperation Foundation

Inventors

• Kim Yong Ho
• Gwak Yong Su

Classifications

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04L1/1874

  Buffer management · CPC title

• H04L1/1835

  Buffer management · CPC title

• H04L1/0081

  Formats specially adapted to avoid errors in the feedback channel (H04L1/1607 takes precedence) · CPC title

• H04L1/1614 Primary

  using bitmaps · CPC title