Transmission point indication in coordinated multi-point system

Patent metadata

Field	Value
Publication number	US-9320015-B2
Application number	US-201213997588-A
Country	US
Kind code	B2
Filing date	Mar 29, 2012
Priority date	Nov 4, 2011
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

Embodiments of the present disclosure describe devices, methods, computer-readable media and systems configurations for transmission point indication in a coordinated multipoint (CoMP) system. A user equipment (UE) may receive common reference signal (CRS) parameters associated with individual base stations of a CoMP measurement set. The UE may also receive a transmission point index corresponding to a first base station of the CoMP measurement set that is scheduled for communications with the UE. A mapping module of the UE may produce a physical downlink shared channel (PDSCH) mapping pattern based on the CRS parameters associated with the scheduled base station.

First claim

The invention claimed is:

1. An apparatus to be employed by a user equipment (UE), the apparatus comprising:
communications circuitry to:
receive, via radio resource control (RRC) signaling, common reference signal (CRS) parameters associated with individual evolved Node Bs (eNBs) of a coordinated multipoint (CoMP) measurement set including a plurality of eNBs, wherein the CRS parameters include a number of CRS antenna ports, a CRS frequency shift, and a transmission point index of the individual eNBs; and
receive a downlink control information (DCI) message including a transmission point index corresponding to a first eNB of the CoMP measurement set; and

mapping circuitry coupled with the communications circuitry, the mapping circuitry to produce a physical downlink shared channel (PDSCH) mapping pattern based on the received CRS parameters associated with the first eNB;
wherein the CRS parameters are received from a second eNB of the CoMP measurement set, and wherein the DCI message is received from the first or second eNB.

2. The apparatus of claim 1 , wherein the communications circuitry is further to use the CRS parameters associated with the first eNB for subsequent communications with the first eNB.

3. The apparatus of claim 1 , wherein the CRS parameters further include information related to orthogonal frequency division multiplexing (OFDM) resource elements dedicated to control information for the individual eNBs.

4. The apparatus of claim 1 , wherein the CRS parameters further include multicast/broadcast single frequency network (MBSFN) information for the individual eNBs of the CoMP measurement set.

5. The apparatus of claim 1 , wherein the communications circuitry is further to receive a transmission from the first eNB, the transmission including an orthogonal frequency division multiplexing (OFDM) frame having a plurality of CRSs, wherein the CRSs are arranged within the frame according to the PDSCH mapping pattern.

6. The apparatus of claim 1 , wherein the CRS parameters are received as part of a configuration protocol for the CoMP measurement set, wherein the configuration protocol further includes configuring channel state information reference signal (CSI-RS) parameters and uplink control channel parameters for communications between the apparatus and one or more eNBs of the CoMP measurement set.

7. The apparatus of claim 1 , further comprising memory configured to store the received CRS parameters.

8. An apparatus to be employed by a serving evolved Node B (eNB), the apparatus including:
communications circuitry; and
coordinated multipoint (CoMP) management circuitry coupled to the communications circuitry, the CoMP management circuitry to:
transmit, to a user equipment (UE) via the communications circuitry using radio resource control (RRC) signaling, common reference signal (CRS) parameters associated with individual eNBs of a CoMP measurement set including a plurality of eNBs, wherein the plurality of eNBs in the CoMP measurement set include the serving eNB and a first eNB, wherein the eNBs of the CoMP measurement set are associated with respective transmission point indexes, and wherein the CRS parameters include a number of CRS antenna ports, a CRS frequency shift of the individual eNBs and a transmission point index of the individual eNBs; and
transmit, to the UE via the communications circuitry, a downlink control information (DCI) message to indicate, based on a first transmission point index associated with the first eNB of the CoMP measurement set, that the first eNB is selected to communicate with the UE.

9. The apparatus of claim 8 , wherein the serving eNB is to manage communications between the UE and the plurality of eNBs of the CoMP measurement set.

10. The apparatus of claim 8 , wherein the CRS parameters are transmitted as part of a configuration protocol for the CoMP measurement set, wherein the configuration protocol further includes configuring channel state information reference signal (CSI-RS) parameters and uplink control channel parameters for communications between the UE and one or more eNBs of the CoMP measurement set.

11. A method, comprising:
receiving, by a user equipment (UE) via radio resource control (RRC) signaling, common reference signal (CRS) parameters associated with individual transmission points of a coordinated multipoint (CoMP) measurement set including a plurality of transmission points, wherein the CRS parameters include a number of CRS antenna ports, a CRS frequency shift, and a transmission point index of the individual transmission points;
receiving, by the UE via a downlink control information (DCI) transmission, a transmission point index corresponding to a first transmission point of the coordinated multipoint measurement set, wherein the CRS parameters are received from a second transmission point and the DCI transmission is received from the first transmission point or the second transmission point; and
determining a physical downlink shared channel (PDSCH) mapping pattern based on the CRS parameters associated with the first transmission point.

12. The method of claim 11 , further comprising receiving, by the UE, a transmission from the first transmission point, wherein the transmission includes an orthogonal frequency division multiplexing (OFDM) frame having a plurality of CRSs, wherein the CRSs are arranged within the frame according to the PDSCH mapping pattern.

13. One or more non-transitory computer-readable media having instructions, stored thereon, that, when executed case a user equipment to:
obtain, via radio resource control (RRC) signaling, common reference signal (CRS) parameters associated with individual transmission points of a coordinated multipoint (CoMP) measurement set including a plurality of transmission points, the CRS parameters including a number of CRS antenna ports, a CRS frequency shift, and a transmission point index of the individual transmission points;
obtain, via a downlink control information (DCI) message, a transmission point index corresponding to a first transmission point of the coordinated multipoint measurement set, wherein the CRS parameters are obtained from a second transmission point and the DCI message is obtained from the first transmission point or the second transmission point; and
determine a physical downlink shared channel (PDSCH) mapping pattern based on the CRS parameters associated with the first transmission point.

14. The one or more non-transitory computer-readable media of claim 13 , wherein the instructions, when executed, further cause the user equipment to:
receive a transmission from the first transmission point, wherein the transmission includes an orthogonal frequency division multiplexing (OFDM) frame having a plurality of CRSs, wherein the CRSs are arranged within the frame according to the PDSCH mapping pattern.

Assignees

• Davydov Alexei Vladimirovich
• Morozov Gregory Vladimirovich
• Maltsev Alexander Alexandrovich
• Bolotin Ilya Alexandrovich
• Sergeyev Vadim Sergeyevich
• Intel Corp

Inventors

• Davydov Alexei Vladimirovich
• Morozov Gregory Vladimirovich
• Maltsev Alexander Alexandrovich
• Bolotin Ilya Alexandrovich
• Sergeyev Vadim Sergeyevich

Classifications

• H04W52/0206

  in access points, e.g. base stations · CPC title

• H04W24/02 Primary

  Arrangements for optimising operational condition · CPC title

• H04W52/34

  TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading · CPC title

• H04W52/242

  taking into account path loss · CPC title

• H04L5/22

  using time-division multiplexing · CPC title