METHOD AND APPARATUS FOR RESELECTING A CELL IN HETEROGENEOUS NETWORKS IN A WIRELESS COMMUNICATION SYSTEM

• US 20180007589A1
• Filed: 09/13/2017
• Published: 01/04/2018
• Est. Priority Date: 10/05/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: JANG, Jae Hyuk, VAN LIESHOUT, Gert Jan, JEONG, Kyeong In
• Granted Patent: US 11,064,397 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 36/0022 for transferring data sessions between adjacent core network technologies
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

The present disclosure provides a method for cell reselection in a wireless communication system in which various radio access technologies (RATs) coexist with each other. In a wireless communication system in which heterogeneous networks coexist with each other, the method of cell reselection between heterogeneous networks for a user equipment may include: receiving a system information block (SIB) containing cell reselection parameters from a corresponding base station; checking whether cell reselection parameters based on a cell selection quality value (Squal) are configured in the received SIB; and performing, when cell reselection parameter based on Squal are not configured, cell reselection based on a cell selection receive level value (Srxlev). The present disclosure may prevent the user equipment from performing unnecessary cell reselection.

Claims

1. A method for reselecting a cell by a terminal in a wireless communication system, the method comprising:

receiving, from a base station, system information on an inter radio access technology (RAT) cell reselection;

determining whether a quality value based cell reselection is supported if the system information includes a quality value for a cell reselection; and

performing the cell reselection based on the determination.

2. The method of claim 1, wherein the cell reselection is performed based on the quality value, if the quality value based cell reselection is determined to be supported.

3. The method of claim 1, wherein the cell reselection is performed based on a reception level value, if the quality value based cell reselection is not determined to be supported.

4. The method of claim 1, wherein the method further comprises receiving, from the base station, system information for a plurality of RATs, and

wherein the determining comprises determining whether the quality value based cell reselection is supported for the plurality of RATs among a RAT supported by a terminal.

5. The method of claim 4, wherein the quality value based cell reselection is determined to be supported when the terminal supports the quality value based cell reselection for all of the plurality of RATs.

6. A terminal for reselecting a cell in a wireless communication system, the terminal comprising:

a transceiver configured to transmit and receive signals; and

a controller coupled with the transceiver and configured to receive system information on an inter radio access technology (RAT) cell reselection from a base station, to determine whether a quality value based cell reselection is supported if the system information includes a quality value for a cell reselection, and to perform the cell reselection based on the determination.

7. The terminal of claim 6, wherein the controller is configured to perform the cell reselection based on the quality value, if the quality value based cell reselection is determined to be supported.

8. The terminal of claim 6, wherein the controller is configured to perform the cell reselection based on a reception level value, if the quality value based cell reselection is not determined to be supported.

9. The terminal of claim 6, wherein the controller is further configured to receive system information for a plurality of RATs from the base station and to determine whether the quality value based cell reselection is supported for the plurality of RATs among a RAT supported by a terminal.

10. The terminal of claim 9, wherein the quality value based cell reselection is determined to be supported when the terminal supports the quality value based cell reselection for all of the plurality of RATs.

11. A method for supporting a cell reselection by a base station in a wireless communication system, the method comprising:

generating system information on an inter radio access technology (RAT) cell reselection; and

transmitting, to a terminal, the generated system information,

wherein the terminal receives the system information and determines whether a quality value based cell reselection is supported if the system information includes a quality value for a cell reselection, and

wherein the cell reselection is performed by the terminal based on the determination.

12. The method of claim 11, wherein the cell reselection is performed by the terminal based on the quality value, if the quality value based cell reselection is determined to be supported.

13. The method of claim 11, wherein the cell reselection is performed by the terminal based on a reception level value, if the quality value based cell reselection is not determined to be supported.

14. The method of claim 11, wherein the method further comprises transmitting, to the terminal, system information for a plurality of RATs, and

wherein the terminal determines whether the quality value based cell reselection is supported for the plurality of RATs among a RAT supported by the terminal.

15. The method of claim 14, wherein the quality value based cell reselection is determined to be supported when the terminal supports the quality value based cell reselection for all of the plurality of RATs.

16. A base station for supporting a cell reselection in a wireless communication system, the base station comprising:

a transceiver configured to transmit and receive signals; and

a controller coupled with the transceiver and configured to generate system information on an inter radio access technology (RAT) cell reselection and to transmit the generated system information to a terminal,

wherein the terminal receives the system information and determines whether a quality value based cell reselection is supported if the system information includes a quality value for a cell reselection, and

wherein the cell reselection is performed by the terminal based on the determination.

17. The base station of claim 16, wherein the cell reselection is performed by the terminal based on the quality value, if the quality value based cell reselection is determined to be supported.

18. The base station of claim 16, wherein the cell reselection is performed by the terminal based on a reception level value, if the quality value based cell reselection is not determined to be supported.

19. The base station of claim 16, wherein the controller is further configured to transmit system information for a plurality of RATs to the terminal, and

wherein the terminal determines whether the quality value based cell reselection is supported for the plurality of RATs among a RAT supported by the terminal.

20. The base station of claim 19, wherein the quality value based cell reselection is determined to be supported when the terminal supports the quality value based cell reselection for all of the plurality of RATs.