Method of accessing channel in wireless local area network system

• US 10,674,537 B2
• Filed: 01/26/2018
• Issued: 06/02/2020
• Est. Priority Date: 06/13/2012
• Status: Active Grant

• Current Assignee: Red Hat, Inc. (International Business Machines Corporation)
• Original Assignee: Red Hat, Inc. (International Business Machines Corporation)
• Inventors: Jeong, Yang Seok, Kim, Joo Young
• Primary Examiner(s): Ly, Anh Vu H
• Application Number:
  US15/880,798
• Publication Number:
  US 20180152965A1
• Time in Patent Office: 858 Days
• Field of Search: None
• 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 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 52/0222 in packet switched networks
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method of accessing a channel in a wireless LAN system is disclosed. A method of accessing a channel in a terminal includes receiving TIM information included in a beacon transmitted by an access point, determining a channel access slot allocated to the terminal based on the TIM information, transmitting a data transmission request to the access point in the channel access slot, and receiving data transmission slot allocation information corresponding to the data transmission request from the access point. Accordingly, a time slot can be prevented from unnecessarily wasting.

Claims

1. A method for channel access by a terminal in a wireless local area network, the method comprising:

transmitting, to an access point, an association request frame;

receiving, from the access point, an association response frame to establish an association between the terminal and the access point, wherein the association response frame includes information indicating an association identifier (AID), wherein the association response frame specifies a length of a channel access slot associated with the terminal;

receiving, from the access point, a beacon frame including Traffic Indication Map (TIM) information and information assigning channel access windows, wherein one of the channel access windows is assigned as a trigger frame channel access window;

transmitting, to the access point, a trigger frame in a slot allocated to the terminal within the trigger frame channel access window, the slot allocated to the terminal being determined based on the TIM information and the AID; and

receiving, from the access point, in response to the trigger frame, an acknowledgement (ACK) frame specifying a timeslot allocated individually to the terminal to start a data transmission and a length of the specified data transmission timeslot, wherein the specified data transmission timeslot is one of a plurality of timeslots within a predetermined period after a certain time, and wherein the length of the specified data transmission timeslot comprises the length in which data can be received.

2. The method according to claim 1, wherein the slot allocated to the terminal is determined based on a position of the AID of the terminal included in the TIM information.

3. The method according to claim 1, further comprising receiving a data frame from the access point during the data transmission.

4. A method for supporting channel access of a terminal by an access point in a wireless local area network, the method comprising:

receiving, from the terminal, an association request frame;

transmitting, to the terminal, an association response frame to establish an association between the terminal and the access point, wherein the association response frame includes information indicating an association identifier (AID), wherein the association response frame specifies a length of a channel access slot associated with the terminal;

transmitting a beacon frame including Traffic Indication Map (TIM) information and information assigning channel access windows, wherein one of the channel access windows is assigned as a trigger frame channel access window;

receiving a trigger frame from the terminal in a slot allocated to the terminal within the trigger frame channel access window, the slot allocated to the terminal being determined based on the TIM information and the AID; and

transmitting, to the terminal, in response to the trigger frame, an acknowledgement (ACK) frame specifying a timeslot allocated individually to the terminal to start a data transmission and a length of the specified data transmission timeslot, wherein the specified data transmission timeslot is one of a plurality of timeslots within a predetermined period after a certain time, and wherein the length of the specified data transmission timeslot comprises the length in which data can be received.

5. The method according to claim 4, wherein the slot allocated to the terminal is determined based on a position of the AID of the terminal included in the TIM information.

6. The method according to claim 4, further comprising receiving data frame from the access point during the data transmission.

7. A terminal for performing channel access, the terminal comprising:

a transceiver; and

a processor,

wherein the processor is configured to;

transmit, to an access point, an association request frame;

receive, from the access point, an association response frame to establish an association between the terminal and the access point, wherein the association response frame includes information indicating an association identifier (AID), wherein the association response frame specifies a length of a channel access slot associated with the terminal;

receive, from the access point, a beacon frame including Traffic Indication Map (TIM) information and information assigning channel access windows, wherein one of the channel access windows is assigned as a trigger frame channel access window;

transmit, to the access point, a trigger frame in a slot allocated to the terminal within the trigger frame channel access window, the slot allocated to the terminal being determined based on the TIM information and the AID; and

receive, from the access point, in response to the trigger frame, an acknowledgement (ACK) frame specifying a timeslot allocated individually to the terminal to start a data transmission and a length of the specified data transmission timeslot, wherein the specified data transmission timeslot is one of a plurality of timeslots within a predetermined period after a certain time, and wherein the length of the specified data transmission timeslot comprises the length in which data can be received.

8. An access point for supporting channel access of a terminal, the access point comprising:

a transceiver; and

a processor,

wherein the processor is configured to;

receive, from the terminal, an association request frame;

transmit, to the terminal, an association response frame to establish an association between the terminal and the access point, wherein the association response frame includes information indicating an association identifier (AID), wherein the association response frame specifies a length of a channel access slot associated with the terminal;

transmit a beacon frame including Traffic Indication Map (TIM) information and information assigning channel access windows, wherein one of the channel access windows is assigned as a trigger frame channel access window;

receive a trigger frame from the terminal in a slot allocated to the terminal within the trigger frame channel access window, the slot allocated to the terminal being determined based on the TIM information and the AID; and

transmit, to the terminal, in response to the trigger frame, an acknowledgement (ACK) frame specifying a timeslot allocated individually to the terminal to start a data transmission and a length of the specified data transmission timeslot, wherein the specified data transmission timeslot is one of a plurality of timeslots within a predetermined period after a certain time, and wherein the length of the specified data transmission timeslot comprises the length in which data can be received.

9. A non-transitory computer machine-readable storage medium storing instructions that cause a processing device to perform operations for channel access by a terminal in a wireless local area network, the operations comprising:

transmitting, to an access point, an association request frame;

receiving, from the access point, an association response frame to establish an association between the terminal and the access point, wherein the association response frame includes information indicating an association identifier (AID), wherein the association response frame specifies a length of a channel access slot associated with the terminal;

receiving, from the access point, a beacon frame including Traffic Indication Map (TIM) information and information assigning channel access windows, wherein one of the channel access windows is assigned as a trigger frame channel access window;

transmitting, to the access point, a trigger frame in a slot allocated to the terminal within the trigger frame channel access window, the slot allocated to the terminal being determined based on the TIM information and the AID; and

receiving, from the access point, in response to the trigger frame, an acknowledgement (ACK) frame specifying a timeslot allocated individually to the terminal to start a data transmission and a length of the specified data transmission timeslot, wherein the specified data transmission timeslot is one of a plurality of timeslots within a predetermined period after a certain time, and wherein the length of the specified data transmission timeslot comprises the length in which data can be received.

10. The non-transitory computer machine-readable storage medium of claim 9, wherein the slot allocated to the terminal is determined based on a position of the AID of the terminal included in the TIM information.

11. The non-transitory computer machine-readable storage medium of claim 9, further comprising receiving a data frame from the access point during the data transmission.

12. A non-transitory computer machine-readable storage medium storing instructions that cause a processing device to perform operations for supporting channel access of a terminal by an access point in a wireless local area network, the operations comprising:

receiving, from the terminal, an association request frame;

transmitting, to the terminal, an association response frame to establish an association between the terminal and the access point, wherein the association response frame includes information indicating an association identifier (AID), wherein the association response frame specifies a length of a channel access slot associated with the terminal;

transmitting a beacon frame including Traffic Indication Map (TIM) information and information assigning channel access windows, wherein one of the channel access windows is assigned as a trigger frame channel access window;

receiving a trigger frame from the terminal in a slot allocated to the terminal within the trigger frame channel access window, the slot allocated to the terminal being determined based on the TIM information and the AID; and

transmitting, to the terminal, in response to the trigger frame, an acknowledgement (ACK) frame specifying a timeslot allocated individually to the terminal to start a data transmission and a length of the specified data transmission timeslot, wherein the specified data transmission timeslot is one of a plurality of timeslots within a predetermined period after a certain time, and wherein the length of the specified data transmission timeslot comprises the length in which data can be received.

13. The non-transitory computer machine-readable storage medium of claim 12, wherein the slot allocated to the terminal is determined based on a position of the AID of the terminal included in the TIM information.

14. The non-transitory computer machine-readable storage medium of claim 12, wherein the processing device further comprises receiving data frame from the access point during the data transmission.