Wireless communication terminal and wireless communication method for multi-user concurrent transmission

• US 10,305,638 B2
• Filed: 03/04/2016
• Issued: 05/28/2019
• Est. Priority Date: 03/04/2015
• Status: Active Grant

• Current Assignee: SK Telecom Co., Ltd., WILUS Inc.
• Original Assignee: SK Telecom Co., Ltd., WILUS Inc.
• Inventors: Ahn, Woojin, Kim, Yongho, Kwak, Jinsam, Son, Juhyung
• Primary Examiner(s): Smith, Marcus
• Assistant Examiner(s): Sharma, Gautam
• Application Number:
  US15/555,075
• Publication Number:
  US 20180131471A1
• Time in Patent Office: 1,180 Days
• Field of Search: None
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1621 Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
• CPC Class Codes: H04L 1/1664 the supervisory signal being transmitted together with payload signals; piggybacking
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04W 72/121 for groups of terminals or users
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 74/085 collision avoidance

Abstract

The present invention relates to a wireless communication terminal and a wireless communication method for efficiently managing simultaneous data transmissions of a plurality of terminals.

To this end, provided are a base wireless communication terminal including: a transceiver configured to transmit and receive a wireless signal; and a processor configured to control an operation of the base wireless communication terminal, wherein the processor is configured to: transmit a trigger frame triggering a multi-user uplink transmission of a plurality of terminals, receive multi-user uplink data through resources allocated to the plurality of terminals, and transmit a block ACK through the resources in response to the received multi-user uplink data, wherein the transmission of the block ACK in each resource is terminated at the same time, and a wireless communication method using the same.

Claims

1. A base wireless communication terminal, the terminal comprising:

a transceiver; and

a processor,

wherein the processor is configured to;

transmit, through the transceiver, a trigger frame triggering a multi-user uplink transmission of one or more terminals, and

receive, through the transceiver, uplink packet(s) transmitted from one or more terminals in response to the trigger frame,

wherein a predetermined padding is performed before a frame check sequence (FCS) field of the trigger frame, and

wherein a predetermined association ID (AID) field information is inserted to the trigger frame to indicate the predetermined padding.

2. The base wireless communication terminal of claim 1, wherein duplicated information is used for the predetermined padding.

3. The base wireless communication terminal of claim 1, wherein the predetermined padding is set based on a processing time needed for the one or more terminals to respond to the trigger frame.

4. The base wireless communication terminal of claim 1, wherein the uplink packet is padded that the multi-user uplink transmission of one or more terminals to be terminated at the same time.

5. The base wireless communication terminal of claim 1,

wherein the processor is further configured to:

transmit, through the transceiver, a response frame for the received uplink packet(s),

wherein the response frame is a block ACK.

6. The base wireless communication terminal of claim 5, wherein padding is performed on a block ACK transmitted through at least one resource to terminate block ACK transmission(s) in each resource at the same time.

7. A wireless communication method of a base wireless communication terminal, comprising:

transmitting a trigger frame triggering a multi-user uplink transmission of one or more terminals; and

receiving uplink packet(s) transmitted from one or more terminals in response to the trigger frame;

wherein a predetermined padding is performed before a frame check sequence (FCS) field of the trigger frame, and

wherein a predetermined association ID (AID) field information is inserted to the trigger frame to indicate the predetermined padding.

8. The wireless communication method of claim 7, wherein duplicated information is used for the predetermined padding.

9. The wireless communication method of claim 7, wherein the predetermined padding is set based on a processing time needed for the one or more terminals to respond to the trigger frame.

10. The wireless communication method of claim 7, wherein the uplink packet is padded that the multi-user uplink transmission of one or more terminals to be terminated at the same time.

11. The wireless communication method of claim 7, wherein the method further comprising:

transmitting a response frame for the received uplink packet(s); and

wherein the response frame is a block ACK.

12. The wireless communication method of claim 11, wherein padding is performed on a block ACK transmitted through at least one resource to terminate block ACK transmission(s) in each resource at the same time.