METHOD AND APPARATUS FOR ACQUIRING INFORMATION USING DEVICE IN IDLE STATE IN WIRELESS COMMUNICATION SYSTEM

• US 20150304023A1
• Filed: 11/20/2013
• Published: 10/22/2015
• Est. Priority Date: 11/29/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Cho, Heejeong, Lee, Eunjong, Choi, Hyeyoung, Hahn, Genebeck
• Granted Patent: US 9,762,315 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/26 at least one of which is mobile
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A method and apparatus of acquiring information on a primary radio access technology (RAT) system in a wireless communication system is provided. An entity of a secondary RAT system transmits a request for information on the primary RAT system to a multi-RAT device, and upon transmitting the request, starting a waiting timer which has a default value. If it is determined that the information on the primary RAT system cannot be acquired, by the multi-RAT device, until the waiting timer expires, the entity of the secondary RAT system reconfigures the waiting timer by a fixed value or a dynamic value.

Claims

1. A method of acquiring, by an entity of a secondary radio access technology (RAT) system, information on a primary RAT system in a wireless communication system, the method comprising:

transmitting a request for information on a primary RAT system to a multi-RAT device supporting a plurality of RATs;

upon transmitting the request, starting a waiting timer which has a default value;

receiving a response of the request, which includes a rejection for the request and a reason for the rejection, from the multi-RAT device, if it is determined that the information on the primary RAT system cannot be acquired, by the multi-RAT device, until the waiting timer expires;

reconfiguring the waiting timer based on the response; and

receiving a second response of the request, which includes an approval for the request and the information on the primary RAT system, from the multi-RAT device, before the reconfigured waiting timer expires.

2. The method of claim 1, wherein the waiting timer is reconfigured by having a value of the remaining time, until the waiting timer expires, plus the default value.

3. The method of claim 1, wherein the response further includes additional time.

4. The method of claim 3, wherein the waiting timer is reconfigured by having a value of the remaining time, until the waiting timer expires, plus the additional time.

5. The method of claim 1, wherein the reason for the rejection is lack of processing time.

6. The method of claim 1, wherein the request is received through a advanced primary RAT system information request (ARSI-REQ) frame, and wherein the response is transmitted through a advanced primary RAT system information response (ARSI-RSP) frame.

7. The method of claim 1, wherein the primary RAT system is a cellular system, and

wherein the secondary RAT system is a Wi-Fi system.

8. The method of claim 1, wherein the entity of the secondary RAT system is an access point (AP).

9. A method of transmitting, by a multi radio access technology (RAT) device supporting a plurality of RATs, information on a primary RAT system in a wireless communication system, the method comprising:

receiving a request for information on a primary RAT system from an entity of a secondary RAT system;

upon receiving the request, starting a waiting timer which has a default value;

determining whether or not the information on the primary RAT system can be acquired from a base station of the primary RAT system until the waiting timer expires;

if it is determined that the information on the primary RAT system cannot be acquired until the waiting timer expires, transmitting a response of the request, which includes a rejection for the request and a reason for the rejection, to the entity of the secondary RAT system.

10. The method of claim 9, further comprising:

transmitting a second response of the request, which includes an approval for the request and the information on the primary RAT system, to the entity of the secondary RAT system before a reconfigured waiting timer expires.

11. The method of claim 9, wherein whether the information on the primary RAT system can be acquired until the waiting timer expires is determined based on at least one of a primary synchronization signal (PSS), secondary synchronization signal (SSS), broadcast channel, tracking area update (TAU) procedure or a random access procedure.

12. A method of transmitting, by a multi radio access technology (RAT) device supporting a plurality of RATs, information in a wireless communication system, the method comprising:

transmitting a type of a primary RAT system to which the multi-RAT device accesses and a status of the multi-RAT device in the primary RAT system, to an entity of a secondary RAT system; and

receiving a request for information on the primary RAT system from the entity of the secondary RAT system.

13. The method of claim 12, wherein the type of the primary RAT system and the status of the multi-RAT device are transmitted using one of a probe frame, authentication frame, or association frame.

14. The method of claim 12, wherein the type of the primary RAT system and the status of the multi-RAT device are transmitted using newly defined frame.

15. The method of claim 12, wherein the primary RAT system is a cellular system, and

wherein the secondary RAT system is a Wi-Fi system.