Method for configuring coordinated multipoint transmission

Patent metadata

Field	Value
Publication number	US-9647806-B2
Application number	US-201214112270-A
Country	US
Kind code	B2
Filing date	Apr 23, 2012
Priority date	Apr 22, 2011
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

Provided is a method for configuring coordinated multipoint transmission (CoMP) of the present invention. The method includes: providing a transmission mode to support CoMP and, at a base station (eNB), configuring the transmission mode to support CoMP to a user terminal (UE) by radio resource control (RRC) signaling. According to the method of the present invention, it becomes possible to configure CoMP so that the LTE system can support the CoMP function.

First claim

The invention claimed is:

1. A method for configuring coordinated multipoint transmission (CoMP), the method comprising the steps of:
at a base station (eNB), notifying a user terminal (UE) of a transmission mode to support CoMP and information of UE to attend to CoMP by radio resource control (RRC) signaling,
wherein the transmission mode to support CoMP is Transmission Mode 10 and, a downlink control information (DCI) format corresponding to the Transmission Mode 10 comprises DCI format 2D.

2. The method of claim 1 , wherein the DCI format 2D is arranged in a UE specific search space based on C-RNTL.

3. The method of claim 1 , further comprising the steps of:
at the eNB, notifying the UE of a channel state information (CSI) feedback mode; and
at the UE, sending CSI as feedback to the eNB based on the transmission mode and the CSI feedback mode.

4. The method of claim 2 , further comprising the steps of:
at the eNB, notifying the UE of a channel state information (CSI) feedback mode; and
at the UE, sending CSI as feedback to the eNB based on the transmission mode and the CSI feedback mode.

5. The method of claim 1 , wherein the information of UE to attend to CoMP is information relating to a reference signal necessary for data demodulation.

6. The method of claim 2 , wherein the information of UE to attend to CoMP is information relating to a reference signal necessary for data demodulation.

7. The method of claim 3 , wherein the information of UE to attend to CoMP is information relating to a reference signal necessary for data demodulation.

8. A base station used to configure coordinated multipoint transmission (CoMP),
wherein the base station notifies a user terminal (UE) of a transmission mode to support CoMP and information of UE to attend to CoMP by radio resource control (RRC) signaling, and
wherein the transmission mode to support CoMP is Transmission Mode 10 and a downlink control information (DCI) Format corresponding to the Transmission Mode 10 comprises DCI format 2D.

9. A user terminal used to configure coordinated multipoint transmission (CoMP),
wherein the user terminal configures a transmission mode to support CoMP and information of UE to attend to CoMP notified from a base station by radio resource control (RRC) signal, and
wherein the transmission mode to support CoMP is Transmission Mode 10 and a downlink control information (DCI)format corresponding to the Transmission Mode 10 comprises DCI format 2D.

10. A radio communication system for configuring coordinated multipoint transmission (CoMP),
wherein a based station notifies a user terminal (UE) of a transmission mode to support CoMP and information of UE to attend to CoMP by radio resource control (RRC) signaling, and
wherein the transmission mode to support CoMP is Transmission Mode 10 and a downlink control information (DCI) format corresponding to the Transmission Mode 10 comprises DCI format 2D.

Assignees

• Nagata Satoshi
• Zhu Jianchi
• Li Mingju
• She Xiaoming
• Chen Lan
• Ntt Docomo Inc

Inventors

• Nagata Satoshi
• Zhu Jianchi
• Li Mingju
• She Xiaoming
• Chen Lan

Classifications

• H04W72/542

  using measured or perceived quality · CPC title

• H04L1/0026

  Transmission of channel quality indication · CPC title

• H04B7/0626

  Channel coefficients, e.g. channel state information [CSI] · CPC title

• H04B7/0619

  using feedback from receiving side (feedback signaling for adaptive modulation/coding H04L1/0001) · CPC title

• H04L1/1887

  Scheduling and prioritising arrangements · CPC title