Methods and devices of interference channel measurement in radio network

Patent metadata

Field	Value
Publication number	US-9544795-B2
Application number	US-201214383192-A
Country	US
Kind code	B2
Filing date	Mar 14, 2012
Priority date	Mar 14, 2012
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

The present invention provides a method in a base station for determining channel interference in a radio network comprising a device-to-device, D2D, capable UE and the base station serving at least one cellular UE, said method comprising: configuring the at least one cellular UE with a cellular uplink Reference Symbol, RS, related parameter; transmitting the cellular uplink RS related parameter associated with the at least one cellular UE to the D2D capable UE; and obtaining information of interference to the D2D capable UE measured by the D2D capable UE using the cellular uplink RS related parameter. The present invention also provides a corresponding method in D2D capable UE and the devices thereof. This achieves a more accurate the interference channel measurement in multi-cell and multi-antenna scenario.

First claim

The invention claimed is:

1. A method in a base station for determining channel interference in a radio network comprising a device-to-device (D2D) capable user equipment (UE) and the base station serving at least one cellular UE, said method comprising:
configuring the at least one cellular UE with a Demodulation RS (DMRS) related parameter;
transmitting the DMRS related parameter associated with the at least one cellular UE to the D2D capable UE;
transmitting a DMRS related configuration parameter, including a Cyclic Shift (CS) to both the D2D capable UE and the at least one cellular UE; and
obtaining information of interference to the D2D capable UE measured by the D2D capable UE using the DMRS related parameter.

2. The method of claim 1 , wherein the obtaining information of interference to the D2D capable UE comprises receiving the interference information in a report transmitted from the D2D capable UE.

3. The method of claim 1 , comprising:
obtaining the interference information for any of a set of CSs of DMRS to monitor interference change.

4. A method in a device-to-device (D2D) capable UE for measuring channel interference in a radio network comprising the D2D capable UE and a base station serving at least one cellular UE, said method comprising:
receiving a Demodulation RS (DMRS) related parameter from the base station, the parameter being used for configuring both the D2D capable UE and the at least one cellular UE;
receiving a DMRS related configuration parameter, including a Cyclic Shift (CS) sent from the base station; and
measuring, by using the DMRS related parameter, interference to the D2D capable UE caused by the at least one cellular UE while the DMRS related parameter is sent from the at least one cellular UE to the base station.

5. The method of claim 4 , comprising: measuring the interference for any of a set of CSs of DMRS to monitor interference change.

6. The method of claim 4 , further comprising one of following post-processing operations:
filtering the interference to reduce fast fading effect;
quantifying the interference to trade off between performance and overhead; or
reporting to the base station only channel information of the cellular UE which causes least interference.

7. A base station, comprising:
a configuring module, adapted to configure at least one cellular UE with a Demodulation RS (DMRS) related parameter;
a transmitter, adapted to transmit the DMRS related parameter associated with the at least one cellular UE to a device-to-device (D2D) capable UE and transmit a DMRS related configuration parameter, including a Cyclic Shift (CS) to both the D2D capable UE and the at least one cellular UE; and
an obtaining module, adapted to obtain information of interference to the D2D capable UE measured by the D2D capable UE using the DMRS related parameter.

8. The base station of claim 7 , wherein the obtaining module is adapted to receive the interference information in a report transmitted from the D2D capable UE.

9. The base station of claim 7 , wherein the obtaining module is adapted to obtain the interference information for any of a set of CSs of DMRS to monitor interference change.

10. A D2D capable terminal, comprising:
a receiver, adapted to receive a Demodulation RS (DMRS) related parameter from a base station, the parameter being used for configuring both the device-to-device (D2D) capable terminal and at least one cellular UE and receive the DMRS related configuration parameter, including a Cyclic Shift (CS) sent from the base station; and
a measuring module, adapted to measure, by using the DMRS related parameter, interference caused by the at least one cellular UE while the DMRS related parameter is sent from the at least one cellular UE to the base station.

11. The D2D capable terminal of claim 10 , wherein the measuring module is adapted to measure the interference for any of a set of CSs of DMRS to monitor interference change.

Assignees

• Lu Qianxi
• Miao Qingyu
• Qian Yu
• Song Xinghua
• Ericsson Telefon Ab L M

Inventors

• Lu Qianxi
• Miao Qingyu
• Qian Yu
• Song Xinghua

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W76/14

  Direct-mode setup · CPC title

• H04J11/005

  of intercell interference · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04L5/0073

  Allocation arrangements that take into account other cell interferences · CPC title