Method and apparatus of uplink set-up in a wireless communication system

• US 9,451,644 B2
• Filed: 03/29/2013
• Issued: 09/20/2016
• Est. Priority Date: 03/29/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ryu, Kiseon, Kwak, Jinsam, Park, Giwon
• Primary Examiner(s): Lai, Andrew
• Assistant Examiner(s): LEE, ANDREW CHUNG CHEUNG
• Application Number:
  US14/380,671
• Publication Number:
  US 20150305069A1
• Time in Patent Office: 1,271 Days
• Field of Search: 370/336, 370/338, 370/311, 370/328
• US Class Current: 1/1
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

The present invention is directed to a wireless communication system. Specifically, the present invention is directed to a method of performing a procedure for link-setup and an apparatus therefore, wherein the method comprises: receiving a probe request frame including time information via a channel, wherein the time information indicates at least one of a minimum scan time for the channel and a maximum scan time for the channel; and performing a procedure for transmitting a probe response frame after receipt of the probe request frame, wherein if a beacon transmission time occurs within a time given based on the time information, transmission of the probe response frame is omitted.

Claims

1. A method of performing a procedure for link-setup at an AP (access point) in a wireless communication system, the method comprising:

receiving, from a UE (User Equipment), a probe request frame including time information via a channel, wherein the time information indicates at least a minimum scan time of the UE for the channel or a maximum scan time of the UE for the channel;

determining whether a beacon transmission time of the AP occurs within a time based on the time information;

transmitting, to the UE, a beacon frame instead of a probe response when the beacon transmission time occurs within the time; and

transmitting, to the UE, a probe response when the beacon transmission time does not occur within the time.

2. The method of claim 1, wherein the time is a minimum scan time of the UE for the channel.

3. The method of claim 1, wherein the time is a maximum scan time of the UE for the channel.

4. The method of claim 1, wherein:

the time is a first time based on the minimum scan time of the UE for the channel; and

if there is a signal detection within the first time, the time is extended to a second time longer than the first time based on the maximum scan time of the UE for the channel.

5. The method of claim 1, wherein:

the time is a first time based on the minimum scan time of the UE for the channel; and

if a medium access control (MAC) frame responding to the probe request frame is received from another access point within the first time, the time is extended to a second time longer than the first time based on the maximum scan time of the UE for the channel.

6. An AP (access point) for performing a procedure for link-setup in a wireless communication system, the AP comprising:

a radio frequency unit; and

a processor configured to;

receive, from a UE (User Equipment), a probe request frame including time information via a channel, wherein the time information indicates at least a minimum scan time of the UE for the channel or a maximum scan time of the UE for the channel;

determine whether a beacon transmission time of the AP occurs within a time based on the time information;

transmit, to the UE, a beacon frame instead of a probe response where the beacon transmission time occurs within the time; and

transmit, to the UE, a probe response when the beacon transmission time does not occur within the time.

7. The AP of claim 6, wherein the time is a minimum scan time of the AP for the channel.

8. The AP of claim 6, wherein the time a maximum scan time of the UE for the channel.

9. The AP of claim 6, wherein:

the time is a first time based on the minimum scan time of the UE for the channel, and

if there is a signal detection within the first time, the time is extended to a second time longer than the first time based on the maximum scan time of the UE for the channel.

10. The AP of claim 6, wherein:

the time is a first time based on the minimum scan time of the UE for the channel, and

if a medium access control (MAC) frame responding to the probe request frame is received from another access point within the first time, the time is extended to a second time longer than the first time based on the maximum scan time of the UE for the channel.