Method for receiving downlink data channels in multicell-based wireless communication systems and apparatus for same

• US 10,097,327 B2
• Filed: 11/23/2016
• Issued: 10/09/2018
• Est. Priority Date: 02/11/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Jonghyun, Sohn, Illsoo, Kim, Kijun, Seo, Hanbyul
• Primary Examiner(s): CHAU, PETER P
• Application Number:
  US15/359,776
• Publication Number:
  US 20170078066A1
• Time in Patent Office: 685 Days
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/1273 of downlink data flows
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A method and a user equipment (UE) for receiving, and a method and a base station (BS) for transmitting a UE specific reference signal based-downlink data channel in a wireless communication system are discussed. The method for receiving a UE specific reference signal based-downlink data channel according to an embodiment includes receiving a downlink control channel from a network; and receiving the UE-specific reference signal based-downlink data channel from the network based on the downlink control channel. The downlink control channel includes an indicator indicating one of two or more parameters configured by a higher layer. The two or more parameters indicate antenna ports of a certain reference signal which is assumed to be quasi co-located with antenna ports of a UE-specific reference signal.

Claims

1. A method for receiving a user equipment (UE)-specific reference signal based-downlink data channel by a UE in a wireless communication system, the method comprising:

receiving, by the UE, a downlink control channel from a network; and

receiving, by the UE, the UE-specific reference signal based-downlink data channel from the network based on the downlink control channel,

wherein the downlink control channel includes an indicator indicating one of two or more parameters configured by a higher layer, and

wherein the two or more parameters indicate certain reference signals which are assumed to be quasi co-located with a UE-specific reference signal.

2. The method of claim 1, wherein a large scale property for the UE-specific reference signal is obtained based on the certain reference signals which are assumed to be quasi co-located with the UE-specific reference signal.

3. The method of claim 1, wherein the certain reference signals are channel status information-reference signals (CSI-RSs).

4. A method for transmitting a user equipment (UE)-specific reference signal based-downlink data channel by a base station (BS) in a wireless communication system, the method comprising:

transmitting, by the BS, a downlink control channel to a UE; and

transmitting, by the BS, the UE-specific reference signal based-downlink data channel to the UE based on the downlink control channel,

wherein the downlink control channel includes an indicator indicating one of two or more parameters configured by a higher layer, and

wherein the two or more parameters indicate certain reference signals which are assumed to be quasi co-located with a UE-specific reference signal.

5. The method of claim 4, wherein a large scale property for the UE-specific reference signal is obtained based on the certain reference signals which are is assumed to be quasi co-located with the UE-specific reference signal.

6. The method of claim 4, wherein the certain reference signals are channel status information-reference signals (CSI-RSs).

7. A user equipment (UE) in a wireless communication system, the UE comprising:

a radio frequency (RF) module; and

a processor configured to control the RF module to;

receive a downlink control channel from a network, and

receive a UE-specific reference signal based-downlink data channel from the network based on the downlink control channel,

wherein the downlink control channel includes an indicator indicating one of two or more parameters configured by a higher layer, and

wherein the two or more parameters indicate certain reference signals which are assumed to be quasi co-located with a UE-specific reference signal.

8. The UE of claim 7, wherein a large scale property for the UE-specific reference signal is obtained based on the certain reference signals which are assumed to be quasi co-located with the UE-specific reference signal.

9. The UE of claim 7, wherein the certain reference signals are channel status information-reference signals (CSI-RSs).

10. A base station (BS) in a wireless communication system, the BS comprising:

a radio frequency (RF) module; and

a processor configured to control the RF module to;

transmit a downlink control channel to a user equipment (UE), and

transmit a UE-specific reference signal based-downlink data channel to the UE based on the downlink control channel,

wherein the downlink control channel includes an indicator indicating one of two or more parameters configured by a higher layer, and

wherein the two or more parameters indicate certain reference signals which are assumed to be quasi co-located with a UE-specific reference signal.

11. The BS of claim 10, wherein a large scale property for the UE-specific reference signal is obtained based on the certain reference signals which are assumed to be quasi co-located with the UE-specific reference signal.

12. The BS of claim 10, wherein the certain reference signals are channel status information-reference signals (CSI-RSs).