Method and device for searching for service for terminal using gas protocol

Patent metadata

Field	Value
Publication number	US-9712285-B2
Application number	US-201214354860-A
Country	US
Kind code	B2
Filing date	Nov 19, 2012
Priority date	Nov 18, 2011
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

Method and device for discovering a service are provided. A responding device receives a service request frame including a first service identifier indicating a service queried by the requesting device. The responding device transmits a service response frame to indicate that the queried service is currently not available and a service announce frame follows on. The responding device determines whether the queried service is accepted or not during a pre-defined time after transmitting the service response frame.

First claim

What is claimed is:

1. A method for discovering a service in a wireless communication system, the method comprising:
receiving, by a responding device, from a requesting device, a service request frame, the service request frame including a first service identifier indicating a service queried by the requesting device;
starting, by the responding device, a service query timer upon receiving the service request frame;
transmitting, by the responding device, to the requesting device while the service query timer is running, a service response frame to indicate that the queried service is supported but is currently not available and that the requesting station should wait to receive a final determination via a subsequent service announce frame, the service response frame including a second service identifier that is set to a same value in the first service identifier; and
when the responding device determines that the queried service is accepted while the service query timer is still running, stopping the service query timer and transmitting, by the responding device, to the requesting device, the subsequent service announce frame to indicate only that the queried service is accepted or not,
wherein the subsequent service announce frame includes a third service identifier that is set to a same value in the first service identifier, and
wherein the subsequent service announce frame is not transmitted by the responding device if the queried service is not accepted or the service query timer is expired.

2. The method of claim 1 , wherein the subsequent service announce frame includes a status code indicating whether the queried service is accepted or not.

3. The method of claim 1 , further comprising:
receiving, by the responding device, from the requesting device, a probe request frame; and
transmitting, by the responding device, to the requesting device, a probe response frame as a response to the probe request frame before receiving the service request frame.

4. 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:
receive, via the transceiver, from a requesting device, a service request frame, the service request frame including a first service identifier indicating a service queried by the requesting device;
start a service query timer upon receiving the service request frame;
transmit, via the transceiver while the service query timer is running, to the requesting device, a service response frame to indicate that the queried service is supported but is currently not available and that the requesting station should wait to receive a final determination via a subsequent service announce frame, the service response frame including a second service identifier that is set to a same value in the first service identifier; and
when the device determines that the queried service is accepted or not while the service query timer is running, stop the service query timer and transmit, via the transceiver, to the requesting device, the subsequent service announce frame to indicate only that the queried service is accepted or not,
wherein the subsequent service announce frame includes a third service identifier that is set to a same value in the first service identifier, and
wherein the subsequent service announce frame is not transmitted by the responding device if the queried service is not accepted or the service query timer is expired.

5. The device of claim 4 , wherein the subsequent service announce frame includes a status code indicating whether the queried service is accepted or not.

6. The device of claim 4 , wherein the processor is further configured to:
receive, from the requesting device, a probe request frame; and
transmit, to the requesting device, a probe response frame as a response to the probe request frame before receiving the service request frame.

Assignees

• Lg Electronics Inc

Inventors

• You Hyang Sun
• Seok Yong Ho
• Lee Ji Hyun

Classifications

• H04W48/14

  using user query {or user detection} · CPC title

• H04L67/16

  Electricity · mapped topic

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04L1/1685 Primary

  the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal · CPC title

• H04L67/51 Primary

  Discovery or management thereof, e.g. service location protocol [SLP] or web services · CPC title