METHOD OF DISCOVERING AND INFORMING OF SERVICE IN WIRELESS LAN SYSTEM AND APPARATUS FOR SUPPORTING SAME

• US 20150003327A1
• Filed: 11/19/2012
• Published: 01/01/2015
• Est. Priority Date: 11/18/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seok, Yong Ho, Lee, Ji Hyun
• Granted Patent: US 9,860,713 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

The present invention relates to a method of informing of a service that is performed by a first station (STA) in a wireless LAN system. The method includes receiving a second service informing frame from a second STA, wherein the second service informing frame includes second service information that is the information on a service served by the second STA; and transmitting a first service informing frame. The first service informing frame includes first service information that is the information on a service served by the first STA, and the second service information.

Claims

1-15. -15. (canceled)

16. A method for discovering a service in a wireless communication system, the method comprising:

performing, by a station, a backoff on a channel during a service announcement interval to determine whether the channel is available; and

transmitting, by the station, a service announcement frame to announce an availability of a service to at least one neighboring station on the available channel within the service announcement interval, the service announcement frame including an interval field indicating a time interval during which the station is available.

17. The method of claim 16, wherein the time interval indicated by the interval field includes an interval within the service announcement interval.

18. The method of claim 16, wherein the station and the at least one neighboring station are synchronized to the service announcement interval.

19. The method of claim 16, wherein the service announcement frame further includes an operating class field and a channel number field, the operating class field indicating a frequency band at which the station is currently operating, the channel number field indicating a channel number on which the station is currently operating.

20. A device configured for discovering a service in a wireless communication system, the device comprising:

a transceiver configured to receive and transmit radio signals; and

a processor operatively coupled with the transceiver and configured to;

perform a backoff on a channel during a service announcement interval to determine whether the channel is available; and

transmit, via the transceiver, a service announcement frame to announce an availability of a service to at least one neighboring station on the available channel within the service announcement interval, the service announcement frame including an interval field indicating a time interval during which the station is available.

21. The device of claim 20, wherein the time interval indicated by the interval field includes an interval within the service announcement interval.

22. The device of claim 20, wherein the station and the at least one neighboring station are synchronized to the service announcement interval.

23. The device of claim 20, wherein the service announcement frame further includes an operating class field and a channel number field, the operating class field indicating a frequency band at which the device is currently operating, the channel number field indicating a channel number on which the device is currently operating.