METHOD FOR TRANSMITTING A SOUNDING REFERENCE SIGNAL IN AN UPLINK COMP COMMUNICATION SYSTEM, AND APPARATUS FOR SAME

• US 20120057516A1
• Filed: 12/07/2010
• Published: 03/08/2012
• Est. Priority Date: 12/07/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ahn, Joon Kui, Kim, Byoung Hoon, Yang, Suck Chel, Seo, Dong Youn, Kim, Min Gyu, Kim, Bong Hoe
• Granted Patent: US 8,737,334 B2
• Time in Patent Office: Days
• US Class Current: 370/312
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

The present invention relates to a method for transmitting a sounding reference signal from a terminal in an uplink coordinative multi-point (CoMP) communication system. Specifically, the method comprises the steps of: receiving parameters for transmitting a sounding reference signal from a serving base station included in a CoMP set; assigning a resource for the sounding reference signal on the basis of the parameters; and transmitting the sounding reference signal to the serving base station included in the CoMP set and to at least one neighboring base station according to the assigned resource, wherein basis sequences of the parameters for the sounding reference signal are different for base stations included in the CoMP set.

Claims

1. In a method for transmitting a sounding reference signal of a user equipment in an uplink CoMP (Cooperative Multi-Point) system, the method for transmitting a sounding reference signal comprising:

receiving parameters for transmitting a sounding reference signal from a serving base station included in a CoMP set;

allocating a resource for the sounding reference signal based upon the parameters; and

transmitting the sounding reference signal to the service base station included in the CoMP set and to at least one or more neighboring base stations in accordance with the allocated resource,

wherein, among the parameters, a basis sequence for the sounding reference signal may be differently determined for each base station included in the CoMP set.

2. The method of claim 1, wherein the transmitting the sounding reference signal comprises:

transmitting the sounding reference signal at different time units for each base station included in the CoMP set.

3. The method of claim 1, wherein the transmitting the sounding reference signal comprises:

simultaneously transmitting the sounding reference signal at different frequency bands for each base station included in the CoMP set.

4. The method of claim 2, wherein, among the parameters, a transmission timing of the sounding reference signal for a specific base station included in the CoMP set is delayed based upon a reception timing of the specific base station.

5. The method of claim 4, wherein, when a contention occurs between the transmission timing of the sounding reference signal for the specific base station included in the CoMP set and a physical channel transmission for another base station, at least one or more transmission symbols for transmitting the physical channel transmission for the other base station are dropped.

6. In a user equipment of an uplink CoMP (Cooperative Multi-Point) system, the user equipment comprising:

a reception module configured to receive parameters for transmitting a sounding reference signal from a serving base station included in a CoMP set;

a processor configured to allocate a resource for the sounding reference signal based upon the parameters; and

a transmission module configured to transmit the sounding reference signal to the service base station included in the CoMP set and to at least one or more neighboring base stations in accordance with the allocated resource,

wherein, among the parameters, a basis sequence for the sounding reference signal may be differently determined for each base station included in the CoMP set.

7. The user equipment of claim 6, wherein the processor differently allocates time units in order to transmit the sounding reference signal for each base station included in the CoMP set.

8. The user equipment of claim 6, wherein the processor differently allocates frequency bands in order to simultaneously transmit the sounding reference signal for each base station included in the CoMP set.

9. The user equipment of claim 7, wherein, among the parameters, a transmission timing of the sounding reference signal for a specific base station included in the CoMP set is delayed based upon a reception timing of the specific base station.

10. The user equipment of claim 9, wherein, when a contention occurs between the transmission timing of the sounding reference signal for the specific base station included in the CoMP set and a physical channel transmission for another base station, at least one or more transmission symbols for transmitting the physical channel transmission for the other base station are dropped.