METHOD AND TERMINAL FOR TRANSMITTING AND RECEIVING PHYSICAL UPLINK DATA CHANNEL MAPPING INFORMATION

• US 20150296533A1
• Filed: 05/13/2013
• Published: 10/15/2015
• Est. Priority Date: 06/25/2012
• Status: Active Grant

• Current Assignee: Golden Eye Technologies LLC (Harfang IP Investment Corp)
• Original Assignee: KT Corporation
• Inventors: Park, Kyu Jin
• Granted Patent: US 9,490,942 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/208 Frequency-division multiple access [FDMA]
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided

Abstract

The present disclosure relates to a wireless communication system. The wireless communication system includes a transmission and reception point and a terminal. The transmission and reception point and the terminal perform cooperative communication.

Claims

1. A method of transmitting channel mapping information by a transmission/reception point, the method comprising:

generating physical uplink data channel mapping information of a transmission/reception point different from a serving transmission/reception point of a first user equipment (UE), wherein the first UE belongs to the serving transmission/reception point; and

transmitting the physical uplink data channel mapping information to the first UE.

2. The method of claim 1, wherein:

the physical uplink data channel mapping information is a cell-specific Sounding Reference Signal (SRS) parameter of the transmission/reception point including SRS sub-frame configuration information and SRS bandwidth configuration information; and

in the transmitting, the cell-specific SRS parameter of the transmission/reception point is transmitted to the first UE through UE-specific higher layer signaling.

3. The method of claim 1, wherein:

the physical uplink data channel mapping information is information indicating whether a physical uplink data channel resource is mapped to a last Single-Carrier Frequency-Division Multiple Access (SC-FDMA) symbol of an uplink resource block; and

in the transmitting, the information indicating whether the physical uplink data channel resource is mapped is transmitted through a physical downlink control channel while being included in a Downlink Control Information (DCI) format corresponding to an uplink grant of the transmission/reception point.

4. The method of claim 1, wherein:

the physical uplink data channel mapping information is one of first information notifying whether the uplink cooperative communication is performed and second information configuring the transmission/reception point as a reception point; and

in the transmitting, the first information and the second information are transmitted through one of higher layer signaling and a physical downlink control channel.

5. The method of claim 4, wherein the second information configuring the transmission/reception point as a reception point is a virtual cell identity.

6. The method of claim 1, wherein:

the physical uplink data channel mapping information is a type of Cell Radio-Network Temporary Identifiers (C-RNTIs) used for calculating a Cyclic Redundancy Check (CRC) attached to the DCI corresponding to an uplink grant; and

in the transmitting, a DCI format corresponding to the uplink grant calculated by one of the C-RNTIs is transmitted through a physical downlink control channel.

7. The method of claim 6, wherein the DCI format corresponding to the uplink grant is a DCI format 4 having a size different from that of other DCI formats.

8. A method of transmitting an uplink data channel by a user equipment (UE), the method comprising:

receiving physical uplink data channel mapping information of a target transmission/reception point from a serving transmission/reception point of the UE, wherein the target transmission/reception point is different from the serving transmission/reception point and the UE belongs to the serving transmission/reception point;

mapping a physical uplink data channel to a wireless resource according to the physical uplink data channel mapping information; and

transmitting the physical uplink data channel mapped to the wireless resource to the target transmission/reception point.

9. The method of claim 8, wherein:

the physical uplink data channel mapping information is a cell-specific SRS parameter of the target transmission/reception point including SRS sub-frame configuration information and SRS bandwidth configuration information;

in the receiving, the cell-specific SRS parameter of the target transmission/reception point is received from the serving transmission/reception point through UE-specific higher layer signaling; and

in the mapping, the physical uplink data channel is mapped to the wireless resource on the basis of the cell-specific SRS sub-frame/bandwidth configuration information included in the cell-specific SRS parameter of the target transmission/reception point by applying a physical uplink data channel resource mapping rule.

10. The method of claim 8, wherein:

the physical uplink data channel mapping information is information indicating whether a physical uplink data channel resource is mapped to a last SC-FDMA symbol of an uplink resource block;

in the receiving, the information indicating whether the physical uplink data channel resource is mapped is received from the serving transmission/reception point through a physical downlink control channel while being included in a DCI format corresponding to an uplink grant of the target transmission/reception point; and

in the mapping, the physical uplink data channel resource is mapped to the last SC-FDMA symbol of a sub-frame indicated by the uplink grant according to a configuration value of the information indicating whether the physical uplink data channel resource included in the DCI format corresponding to the uplink grant is mapped.

11. The method of claim 8, wherein:

the physical uplink data channel mapping information is one of first information notifying whether the uplink cooperative communication is performed and second information configuring the target transmission/reception point as a reception point;

in the receiving, the first information and the second information are received from the serving transmission/reception point through one of higher layer signaling and a physical downlink control channel; and

in the mapping, the physical uplink data channel resource is mapped to remaining resources except for a last SC-FDMA symbol of all sub-frames.

12. The method of claim 8, wherein:

the physical uplink data channel mapping information is types of C-RNTIs used for calculating a CRC attached to DCI corresponding to an uplink grant;

in the receiving, a DCI format corresponding to the uplink grant calculated by one of the C-RNTIs is received from the serving transmission/reception point through a physical downlink control channel; and

in the mapping, the physical uplink data channel resource is mapped to a last SC-FDMA symbol of a sub-frame indicated by the uplink grant

13. The method of claim 12, wherein the DCI format corresponding to the uplink grant is a DCI format 4 having a size different from that of other DCI formats.

14. The method of claim 10, wherein in the mapping, when the physical uplink data channel not based on the uplink grant is transmitted, the physical uplink data channel resource is mapped to a last SC-FDMA symbol of a sub-frame indicated by the uplink grant, equally to operations for initial transmission, transmission before retransmission for the initial transmission, or transmission before the retransmission.

15. A user equipment (UE) for transmitting an uplink data channel, the UE comprising:

a reception unit configured to receive physical uplink data channel mapping information of a target transmission/reception point from a serving transmission/reception point of the UE, wherein the target transmission/reception point is different from the serving transmission/reception point to which the UE itself belongs;

a controller configured to map a physical uplink data channel to a wireless resource according to the physical uplink data channel mapping information; and

a transmission unit configured to transmit the physical uplink data channel mapped to the wireless resource to the target transmission/reception point.