METHOD AND APPARATUS FOR INITIAL ACCESS DISTRIBUTION OVER WIRELESS LAN

• US 20150139209A1
• Filed: 06/18/2013
• Published: 05/21/2015
• Est. Priority Date: 06/18/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Giwon, Ryu, Kiseon, Kwak, Jinsam
• Granted Patent: US 9,521,694 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 74/0875 with assigned priorities based access
• CPC Class Codes: H04W 76/00 Connection management
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Disclosed are a method and an apparatus for initial access distribution over a wireless LAN. A method for an initial access by a station (STA) comprises: a step in which the STA receives a fast initial link setup (FILS) backoff parameter from an access point (AP); and a step in which the STA implements a backoff procedure by using the final FILS backoff parameter determined on the basis of the FILS backoff parameter and an access category of the data to be transmitted by the STA. Accordingly, the initial access of the STA can be distributed.

Claims

1. A method for an initial access of a station (STA), the method comprising:

receiving, by the STA, a Fast Initial Link Setup (FILS) backoff parameter from an AP (Access Point); and

performing, by the STA, a backoff procedure based on a final FILS backoff parameter determined based on the FILS backoff parameter and an access category of data to be transmitted by the STA,

wherein the FILS backoff parameter includes information for determining a size of a Contention Window (CW) for each of the access category and information for determining anArbitration Inter-Frame Space Number (AIFSN), and

wherein the access category is information for indicating a type of traffic data of the STA allowed by the AP for the initial access.

2. The method of claim 1,

wherein the AIFSN and the size of the CW included in the FILS backoff parameter decrease when the priority of the access category increases.

3. The method of claim 1,

wherein the FILS backoff parameter is varied based on information received from the STA to the AP, and

wherein the information received from the STA is at least one of information on an access category of data to be transmitted from the STA or user priority, backoff retry count information, packet retransmission count information, and latest backoff interval information.

4. The method of claim 1, further comprising:

receiving, by the STA, an FILS access distribution indication parameter from the AP; and

determining whether the STA performs a backoff procedure based on the final FILS backoff parameter based on the FILS access distribution indication parameter,

wherein the FILS access distribution indication parameter includes information on whether the STA performs the backoff procedure based on the final FILS backoff parameter.

5. The method of claim 4,

wherein determining whether the STA performs a backoff procedure based on the final FILS backoff parameter based on the FILS access distribution indication parameter includes:

when the FILS access distribution indication parameter is 1, performing, by the STA, the backoff procedure based on the final FILS backoff parameter; and

when the FILS access distribution indication parameter is 0, performing, by the STA, the backoff procedure based on a default backoff parameter.

6. An station (STA) of a wireless LAN system, the STA comprising:

a processor configured to;

receive a Fast Initial Link Setup (FILS) backoff parameter from an AP (Access Point) by the STA, and

perform, by the STA, a backoff procedure based on a final FILS backoff parameter determined based on the FILS backoff parameter and an access category of data to be transmitted by the STA,

wherein the FILS backoff parameter includes information for determining a size of a Contention Window (CW) for each of the access categories and information for determining an Arbitration Inter-Frame Space Number (AIFSN), and

wherein the access category is information for indicating a type of traffic data of the STA allowed by the AP for the initial access.

7. The STA of claim 6,

wherein the AIFSN and the size of the CW included in the FILS backoff parameter decrease when the priority of the access category increases.

8. The STA of claim 6,

wherein the FILS backoff parameter is varied based on information received from the STA to the AP, and

wherein the information received from the STA is at least one of information on an access category of data to be transmitted from the STA or user priority, backoff retry count information, packet retransmission count information, and latest backoff interval information.

9. The STA of claim 6,

wherein the processor is configured t0:

receive, by the STA, an FILS access distribution indication parameter from the AP, and

determine whether the STA performs a backoff procedure based on the final FILS backoff parameter based on the FILS access distribution indication parameter,

wherein the FILS access distribution indication parameter includes information on whether the STA performs the backoff procedure based on the final FILS backoff parameter.

10. The STA of claim 9,

wherein the processor is configured to:

when the FILS access distribution indication parameter is 1, perform, by the STA, the backoff procedure based on the final FILS backoff parameter and,

when the FILS access distribution indication parameter is 1, perform, by the STA, the backoff procedure based on the final FILS backoff parameter.