Method and apparatus for performing measurement in an extension carrier

Patent metadata

Field	Value
Publication number	US-9369882-B2
Application number	US-201113521697-A
Country	US
Kind code	B2
Filing date	Feb 1, 2011
Priority date	Feb 2, 2010
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A method in which a terminal (UE) operates to perform channel quality measurement in a system which supports carrier aggregation, disclosed in the present description, comprises the following steps: receiving, from a base station, a first message containing a first indicator for indicating control information for channel quality measurement used in an extension component carrier; receiving control information corresponding to the first indicator from the base station via the extension component carrier; and performing channel quality measurement in the extension component carrier using the received control information.

First claim

The invention claimed is:

1. A method to perform channel quality measurement when a User Equipment (UE) is configured with one standalone component carrier and one non-standalone component carrier, the method performed by the UE and comprising:
receiving configuration information from a base station,
wherein the configuration information is used for configuring channel quality measurement in the non-standalone component carrier and is configured by a radio resource control (RRC) signaling message; and
performing the channel quality measurement in the non-standalone component carrier based on a Channel State Information reference signal (CSI-RS) when the configuration information includes a first indicator indicating that the CSI-RS is used for the channel quality measurement, or performing the channel quality measurement in the non-standalone component carrier based on a common reference signal (CRS) when the configuration information does not include the first indicator.

2. The method of claim 1 , wherein the first indicator is transmitted after establishing an RRC connection, once or periodically when the configuration information is the RRC signaling message.

3. The method of claim 1 , wherein the first indicator is transmitted once after establishing an RRC connection when the configuration information is the broadcast message.

4. The method of claim 1 , further comprising receiving a second indicator indicating a position of the CSI-RS and the CRS.

5. The method of claim 1 , wherein the CRS or the CSI-RS has a reduced Reference Signal Density (RSD).

6. The method of claim 1 , wherein the CRS has a reduced Reference Signal Density (RSD) for at least one of first and second antennas.

7. The method of claim 1 , wherein the CRS has a first or second slot removed.

8. A User Equipment (UE) to perform channel quality measurement when a User Equipment (UE) is configured with one standalone component carrier and one non-standalone component carrier, the UE comprising:
a radio frequency unit configured to transmit and receive a radio signal; and
a controller configured to:
receive configuration information from a base station,
wherein the configuration information is used for configuring channel quality measurement in the non-standalone component carrier and is configured by a radio resource control (RRC) signaling message, and
perform the channel quality measurement in the non-standalone component carrier based on a Channel State Information reference signal (CSI-RS) when the configuration information includes a first indicator indicating that the CSI-RS is used for the channel quality measurement, or perform the channel quality measurement in the non-standalone component carrier based on a common reference signal (CRS) when the configuration information does not include the first indicator.

Assignees

• Kim Soyeon
• Moon Sungho
• Chung Jaehoon
• Noh Minseok
• Lg Electronics Inc

Inventors

• Kim Soyeon
• Moon Sungho
• Chung Jaehoon
• Noh Minseok

Classifications

• H04L1/0031

  Multiple signaling transmission (H04L1/1664, F15 take precedence) · CPC title

• H04W24/10 Primary

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04L1/0026 Primary

  Transmission of channel quality indication · CPC title

• H04W24/00 Primary

  Supervisory, monitoring or testing arrangements · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title