Method and apparatus for measurement for inter-cell interference coordination in radio communication system

Patent metadata

Field	Value
Publication number	US-9161236-B2
Application number	US-201113509748-A
Country	US
Kind code	B2
Filing date	Mar 29, 2011
Priority date	Mar 29, 2010
Publication date	Oct 13, 2015
Grant date	Oct 13, 2015

Abstract

A wireless communication system and, more specifically, a measurement method and apparatus for inter-cell interference coordination in a wireless communication system are disclosed. Herein, a method for supporting measurement of a User Equipment (UE) by a first base station in a wireless communication system includes the steps of acquiring information of downlink subframe configuration of a second base station, determining measurement objects of downlink resource of the first base station based on the downlink subframe configuration of the second base station; transmitting information of the measurement objects to the UE, and receiving measurement result for the measurement objects from the UE.

First claim

The invention claimed is:

1. A method for supporting measurement of a User Equipment (UE) by a first base station in a wireless communication system, the method comprising:
acquiring, by the first base station, information of a downlink subframe configuration of a second base station;
determining, by the first base station, measurement objects of a downlink resource of the first base station based on the downlink subframe configuration of the second base station;
transmitting, by the first base station, information of the measurement objects to the UE; and
receiving, by the first base station, a measurement result for the measurement objects from the UE,
wherein the information of the measurement objects restricts a measurement region on which the UE performs a measurement to at least one specific Orthogonal Frequency Division Multiplexing (OFDM) symbol of at least one downlink subframe of the first base station, and
wherein the downlink subframe configuration of the second base station includes information indicating at least one subframe of the second base station configured as an Almost Blank Subframe (ABS).

2. The method according to claim 1 , wherein the measurement objects include downlink resource of the first base station having reduced interference from the second base station.

3. The method according to claim 1 , wherein the measurement objects include downlink resource of the first base station constantly interfered by the second base station.

4. The method according to claim 1 , wherein the information of the measurement objects further restricts the measurement region for the UE by one or a combination of control region, data region, slot, resource block and antenna port of the first base station.

5. The method according to claim 1 , wherein the information of the measurement objects is transmitted through RRC (Radio Resource Control) signaling.

6. The method according to claim 1 , wherein the downlink subframe configuration of the second base station includes offset of a boundary of downlink subframe of the first base station and a boundary of downlink subframe of the second base station.

7. The method according to claim 1 , wherein the measurement result includes measurement result for at least one of RLM (Radio Link Monitoring) measurement, CSI (Channel State Information) measurement, interference measurement and RRM (Radio Resource Management) measurement.

8. The method according to claim 7 , wherein the measurement result for RRM measurement includes RSRQ (Reference Signal Received Quality), the RSRQ is measured by RSRP (Reference Signal Received Power) and RSSI (Received Signal Strength Indicator), and
wherein the information of the measurement objects for one or more of RSRQ, RSRP and RSSI restrict the measurement region for the UE by all OFDM symbols in at least one downlink subframe of the first base station.

9. A method for performing measurement by a User Equipment (UE) in a wireless communication system, the method comprising:
receiving, by the UE, information of measurement objects from a first base station;
performing, by the UE, measurement for the measurement objects; and
transmitting, by the UE, measurement result to the first base station,
wherein the measurement objects are determined from a downlink resource of the first base station based on a downlink subframe configuration of a second base station, and
wherein the information of the measurement objects restricts a measurement region on which the UE performs measurement to at least one specific Orthogonal Frequency Division Multiplexing (OFDM) symbol of at least one downlink subframe of the first base station, and
wherein the downlink subframe configuration of the second base station includes information indicating at least one subframe of the second base station configured as an Almost Blank Subframe (ABS).

10. The method according to claim 9 , wherein the measurement objects include downlink resource of the first base station having reduced interference from the second base station.

11. The method according to claim 9 , wherein the measurement objects include downlink resource of the first base station constantly interfered by the second base station.

12. The method according to claim 9 , wherein the information of the measurement objects further restricts the measurement region for the UE by one or a combination of control region, data region, slot, resource block and antenna port of the first base station.

13. The method according to claim 9 , wherein the information of the measurement objects is received through RRC (Radio Resource Control) signaling.

14. The method according to claim 9 , wherein the downlink subframe configuration of the second base station includes offset of a boundary of downlink subframe of the first base station and a boundary of downlink subframe of the second base station.

15. The method according to claim 9 , wherein the measurement result includes measurement result for at least one of RLM (Radio Link Monitoring) measurement, CSI (Channel State Information) measurement, interference measurement and RRM (Radio Resource Management) measurement.

16. The method according to claim 15 , wherein the measurement result for RRM measurement includes RSRQ (Reference Signal Received Quality), the RSRQ is measured by RSRP (Reference Signal Received Power) and RSSI (Received Signal Strength Indicator), and
wherein the information of the measurement objects for one or more of RSRQ, RSRP and RSSI restricts the measurement region for the UE by all OFDM symbols in at least one downlink subframe of the first base station.

17. A base station for supporting measurement of a User Equipment (UE), base station comprising:
a reception module configured to receive uplink signals from the UE;
a transmission module configured to transmit downlink signals to the UE; and
a processor configured to:
control transmission and reception of a first base station through the transmission module and the reception module;
acquire information of a downlink subframe configuration of a second base station;
determine measurement objects of a downlink resource of the first base station based on the downlink subframe configuration of the second base station;
transmit information of the measurement objects to the UE; and
receive measurement result for the measurement objects from the UE,

wherein the information of the measurement objects restricts a measurement region on which the UE performs measurement to at least one specific Orthogonal Frequency Division Multiplexing (OFDM) symbol of at least one downlink subframe of the first base station, and
wherein the downlink subframe configuration of the second base station includes information indicating at least one subframe of the second base station configured as an Almost Blank Subframe (ABS).

18. A User Equipment (UE) for performing measurement, the UE comprising:
a reception module configured to receive downlink signals from a first base station;
a transmission module configured to transmit uplink signals to the first base station; and
a processor configured to:
control the UE including the transmission module and the reception module;
receive information of measurement objects from the first base station;
perform measurement for the measurement objects; and
transmit measurement result to the first base station,

wherein the measurement objects are determined from a downlink resource of the first base station based on a downlink subframe configuration of a second base station, and
wherein the infor

Assignees

• Seo Inkwon
• Seo Hanbyul
• Kim Byounghoon
• Kim Kijun
• Kim Hakseong
• Lg Electronics Inc

Inventors

• Seo Inkwon
• Seo Hanbyul
• Kim Byounghoon
• Kim Kijun
• Kim Hakseong

Classifications

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/0091

  Signalling for the administration of the divided path, e.g. signalling of configuration information · CPC title

• H04W48/16

  Discovering, processing access restriction or access information · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L5/0023

  Time-frequency-space · CPC title