INTERFERENCE MEASUREMENT METHOD AND APPARATUS FOR USE IN DISTRIBUTED ANTENNA SYSTEM

• US 20140086082A1
• Filed: 09/25/2013
• Published: 03/27/2014
• Est. Priority Date: 09/25/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Younsun, LEE, Hyojin, KIM, Youngbum, CHO, Joonyoung, JI, Hyoungju
• Granted Patent: US 9,510,225 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• 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 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/54 based on quality criteria

Abstract

An interference measurement method and apparatus for use in a Distributed Antenna System (DAS) is provided. The method for transmitting channel state information based on interference measurement of a terminal in a Distributed Antenna System (DAS) according to the present disclosure includes receiving configuration of Interference Measurement Resource (IMR) for measuring interferences caused by plural Transmission Points (TPs), receiving control information including scheduling information on Physical Downlink Shared Channel (PDSCH), determining whether IMR-based interference measurement and PDSCH reception occur at a same subframe, and transmitting the channel state information generated according to a result of the determination. The interference measurement method and apparatus of the present disclosure is capable of measuring interference for efficient communication in the distributed antenna system.

Claims

1. A method for transmitting channel state information based on interference measurement of a terminal in a Distributed Antenna System (DAS), the method comprising:

receiving configuration of Interference Measurement Resource (IMR) for measuring interferences caused by plural Transmission Points (TPs);

receiving control information including scheduling information on Physical Downlink Shared Channel (PDSCH);

determining whether IMR-based interference measurement and PDSCH reception occur at a same subframe; and

transmitting the channel state information generated according to a result of the determination.

2. The method of claim 1, wherein the transmitting of the channel state information comprises generating, when the IMR-based interference measurement and PDSCH reception occur at the same subframe, the channel state information using a previous interference measurement result without performing interference measurement at the corresponding subframe.

3. The method of claim 1, wherein the transmitting of the channel state information comprises:

performing, when the IMR-based interference measurement and PDSCH reception occur at the same subframe, the interference measurement in a Resource Block (RB) in which the PDSCH is not received without performing the interference measurement in the RB in which the PDSCH is received at the corresponding subframe; and

generating the channel state information based on a result of the interference measurement.

4. The method of claim 1, wherein the transmitting of the channel state information comprises:

performing, when the IMR-based interference measurement and PDSCH reception occur at the same subframe, the interference measurement by applying an Interference Adjustment Factor (IAR) in a Resource Block (RB) in which the PDSCH is received and interference measurement in the RB in which the PDSCH is not received at the corresponding subframe;

generating the channel state information based on a result of the interference measurement.

5. A method for a base station to assume a channel state information generation process in a Distributed Antenna System (DAS), the method comprising:

configuring Interference Measurement Resource (IMR) for measuring interferences caused by plural Transmission Points (TPs);

transmitting control information including scheduling information on Physical Downlink Shared Channel (PDSCH);

determining whether IMR-based interference measurement and PDSCH reception occur at a same subframe; and

assuming a channel state information generation process according to a result of the determination.

6. The method of claim 5, wherein the assuming of the channel state information generation process comprises assuming, when the IMR-based interference measurement and PDSCH reception occur at the same subframe, that the terminal generates the channel state information using a previous interference measurement result without performing interference measurement at the corresponding subframe.

7. The method of claim 5, wherein the assuming of the channel state information generation process comprises assuming, when the IMR-based interference measurement and PDSCH reception occur at the same subframe, that the UE performs the interference measurement in a Resource Block (RB) in which the PDSCH is not received without performing the interference measurement in the RB in which the PDSCH is received at the corresponding subframe and generates the channel state information based on a result of the interference measurement.

8. The method of claim 5, wherein the assuming of the channel state information generation process comprises assuming, when the IMR-based interference measurement and PDSCH reception occur at the same subframe, that the UE performs the interference measurement by applying an Interference Adjustment Factor (IAR) in a Resource Block (RB) in which the PDSCH is received and interference measurement in the RB in which the PDSCH is not received at the corresponding subframe and generates the channel state information based on a result of the interference measurement.

9. An apparatus for transmitting channel state information based on interference measurement of a terminal in a Distributed Antenna System (DAS), the apparatus comprising:

a controller which controls receiving configuration of Interference Measurement Resource (IMR) for measuring interferences caused by plural Transmission Points (TPs) and control information including scheduling information on Physical Downlink Shared Channel (PDSCH), determining whether IMR-based interference measurement and PDSCH reception occur at a same subframe, and transmitting the channel state information generated according to a result of the determination.

10. The apparatus of claim 9, wherein the controller controls generating, when the IMR-based interference measurement and PDSCH reception occur at the same subframe, the channel state information using a previous interference measurement result without performing interference measurement at the corresponding subframe.

11. The apparatus of claim 9, wherein the controller controls performing, when the IMR-based interference measurement and PDSCH reception occur at the same subframe, the interference measurement in a Resource Block (RB) in which the PDSCH is not received without performing the interference measurement in the RB in which the PDSCH is received at the corresponding subframe and generating the channel state information based on a result of the interference measurement.

12. The apparatus of claim 9, wherein the controller controls performing, when the IMR-based interference measurement and PDSCH reception occur at the same subframe, the interference measurement by applying an Interference Adjustment Factor (IAR) in a Resource Block (RB) in which the PDSCH is received and interference measurement in the RB in which the PDSCH is not received at the corresponding subframe and generating the channel state information based on a result of the interference measurement.

13. An apparatus for a base station to assume a channel state information generation process of a base station in a Distributed Antenna System (DAS), the apparatus comprising:

a controller which controls configuring Interference Measurement Resource (IMR) for measuring interferences caused by plural Transmission Points (TPs), transmitting control information including scheduling information on Physical Downlink Shared Channel (PDSCH), determining whether IMR-based interference measurement and PDSCH reception occur at a same subframe, and assuming a channel state information generation process according to a result of the determination.

14. The apparatus of claim 13, wherein the controller controls assuming, when the IMR-based interference measurement and PDSCH reception occur at the same subframe, that the terminal generates the channel state information using a previous interference measurement result without performing interference measurement at the corresponding subframe.

15. The apparatus of claim 13, wherein the controller controls assuming, when the IMR-based interference measurement and PDSCH reception occur at the same subframe, that the UE performs the interference measurement in a Resource Block (RB) in which the PDSCH is not received without performing the interference measurement in the RB in which the PDSCH is received at the corresponding subframe and generates the channel state information based on a result of the interference measurement.

16. The apparatus of claim 13, wherein the controller controls assuming, when the IMR-based interference measurement and PDSCH reception occur at the same subframe, that the UE performs the interference measurement by applying an Interference Adjustment Factor (IAR) in a Resource Block (RB) in which the PDSCH is received and interference measurement in the RB in which the PDSCH is not received at the corresponding subframe and generates the channel state information based on a result of the interference measurement.

17. A method for a base station to support interference measurement of a terminal in a Distributed Antenna System (DAS), the method comprising:

determining whether Physical Downlink Shared Channel (PDSCH) exists in a certain Resource Block (RB); and

transmitting, when no PDSCH exists, an interference signal generated randomly from a neighbor base station to the terminal on an interference measurement resource.

18. The method of claim 17, further comprising transmitting, when PDSCH exists in a certain RB, transmitting the RB including the PDSCH.

19. The method of claim 17, further comprising, acquiring information on the interference measurement resource which the neighbor base station has configured to the terminal.

20. The method of claim 17, wherein the interference measurement resource is configured to the terminal to measure interference from a plurality of Transmission Points (TPs).

21. A base station supporting interference measurement of a terminal in a Distributed Antenna System (DAS), the base station comprises:

a transceiver which transmits and receives data; and

a controller which determines whether Physical Downlink Shared Channel (PDSCH) exists in a certain Resource Block (RB) and controls, when no PDSCH exists, the transceiver to transmit an interference signal generated randomly from a neighbor base station to the terminal on an interference measurement resource.

22. The base station of claim 21, wherein the controller controls, when PDSCH exists in a certain RB, the transceiver to transmit the RB including the PDSCH.

23. The base station of claim 21, wherein the controller acquires information on the interference measurement resource which the neighbor base station has configured to the terminal.

24. The base station of claim 21, wherein the interference measurement resource is configured to the terminal to measure interference from a plurality of Transmission Points (TPs).

25. An interference measurement method of a terminal in a Distributed Antenna System (DAS), the method comprising:

receiving configuration information on interference measurement resource;

performing interference measurement on the interference measurement resource according to the configuration information; and

transmitting interference measurement result,

wherein the interference measurement resource includes, when no Physical Downlink Shared Channel (PDSCH) exists in a certain Resource Block (RB) of a neighbor base station, and interference signal predicted to be transmitted by the neighbor base station.

26. The method of claim 25, wherein the interference measurement resource includes, when PDSCH exists in a certain RB, the PDSCH transmitted by the neighbor base station.

27. The method of claim 25, wherein the interference measurement resource is configured to measure interference from a plurality of Transmission Points (TPs).

28. A terminal for measuring interference in a Distributed Antenna System (DAS), the terminal comprising:

a transceiver which transmits and receives data; and

a controller which controls the transceivers to receive configuration information on interference measurement resource, performs interference measurement on the interference measurement resource according to the configuration information, and transmit interference measurement result,

wherein the interference measurement resource includes, when no Physical Downlink Shared Channel (PDSCH) exists in a certain Resource Block (RB) of a neighbor base station, and interference signal predicted to be transmitted by the neighbor base station.

29. The terminal of claim 28, wherein the interference measurement resource includes, when PDSCH exists in a certain RB, the PDSCH transmitted by the neighbor base station.

30. The terminal of claim 28, wherein the interference measurement resource is configured to measure interference from a plurality of Transmission Points (TPs).