Method and apparatus for measuring a channel state when receiving system information on a neighboring cell in a wireless communication system

• US 8,705,453 B2
• Filed: 11/02/2010
• Issued: 04/22/2014
• Est. Priority Date: 11/03/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jung, Sung Hoon, Chun, Sung Duck, Yi, Seung June, Lee, Young Dae, Park, Sung Jun
• Primary Examiner(s): TORRES, MARCOS L
• Assistant Examiner(s): Stephen, Emem
• Application Number:
  US13/500,905
• Publication Number:
  US 20120196593A1
• Time in Patent Office: 1,267 Days
• Field of Search: 370328-329, 455/434, 455/423, 455/67.11
• US Class Current: 370/328
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 48/10 using broadcasted information

Abstract

The present invention relates to a method for receiving system information on a neighboring cell by means of a terminal in a wireless communication system, the method comprising the steps of receiving a system information read command for a neighboring cell from a serving cell over a certain period of time; ending communication with the serving cell, and reading system information from the adjacent cell; and relaying the system information to the serving cell after the certain period of time elapses, wherein a reference signal from the adjacent cell is received over the certain period of time to measure a channel state value. If the channel state value is reduced to a preset value or less, a further step may comprise ending the reading of the system information.

Claims

1. A method for receiving system information on a neighboring cell by user equipment (UE) in a wireless communication system, the method:

receiving a system information reading command of a neighboring cell from a serving cell for a certain time period;

suspending communication with the serving cell, and reading system information from the neighboring cell for the certain time period;

measuring a channel status value during the certain time period, by using a reference signal received from the neighboring cell; and

transmitting the system information to the serving cell after the certain time period elapses,

when the channel status value is reduced to a preset value or less, suspending reading of the system information, and transmitting, by the UE, a system information reading suspension indicator to the serving cell, and

wherein the system information reading suspension indicator indicates the quality of deterioration status of the neighboring cell, and

wherein the preset value is set as a temporally averaged quality value by filtering a value received by a radio resource control (RRC) layer from a physical layer.

2. The method according to claim 1, further comprising resuming communication with the serving cell if the reading of the system information is suspended.

3. The method according to claim 1, wherein the system information reading suspension indicator is transmitted to the serving cell together with the channel status value.

4. A user equipment (UE) in a wireless communication system, the user equipment comprising:

a wireless communication module for transmitting and receiving a signal to and from a serving cell and a neighboring cell; and

a processor for processing the signal,

wherein the processor, if a system information reading command of the neighboring cell is received from the serving cell for a certain time period, suspends communication with the serving cell, reads system information from the neighboring cell for the certain time period, measures a channel status value during the certain time period by using a reference signal received from the neighboring cell, and transmits the system information to the serving cell, and

when the channel status value is reduced to a preset value or less, the processor suspends reading of the system information, and transmits a system information reading suspension indicator to the serving cell, and

wherein the system information reading suspension indicator indicates the quality deterioration status of the neighboring cell, and

wherein the preset value is set as a temporally averaged quality value by filtering a value received by a radio resource control (RRC) layer from a physical layer.

5. The user equipment according to claim 4, wherein the processor resumes communication with the serving cell if the reading of the system information is suspended.

6. The user equipment according to claim 4, wherein the system information reading suspension indicator is transmitted to the serving cell together with the channel status value.