INTERFERENCE MEASUREMENT METHOD AND APPARATUS FOR NEW CARRIER TYPE

• US 20140241191A1
• Filed: 02/28/2014
• Published: 08/28/2014
• Est. Priority Date: 02/28/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Younsun, Lee, Hyojin, Choi, Seunghoon, Yu, Hyoungyoul
• Granted Patent: US 9,520,974 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• 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: H04L 5/0082 at predetermined intervals
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided

Abstract

An Interference Measurement Resource (IMR) allocation method and apparatus for allocating resources for efficient interference measurement in a downlink in a system supporting a New Carrier Type (NCT) is provided. The interference measurement configuration method of a base station transmitting subframes including, or not including, Cell-specific Reference Signals (CRS) in a wireless communication system includes determining whether a terminal supports a New Carrier Type (NCT) subframe, allocating, when the terminal supports the NCT subframe, Interference Measurement Resources (IMR) to the terminal at Resource Elements (REs) where other signals are not mapped in the subframe, transmitting information on the allocated IMR to the terminal, and transmitting the subframe including the allocated IMR to the terminal.

Claims

1. An interference measurement configuration method of a base station transmitting subframes including, or not including, Cell-specific Reference Signals (CRS) in a wireless communication system, the method comprising:

determining whether a terminal supports a New Carrier Type (NCT) subframe;

allocating, when the terminal supports the NCT subframe, Interference Measurement Resources (IMR) to the terminal at Resource Elements (REs) where other signals are not mapped in the subframe;

transmitting information on the allocated IMR to the terminal; and

transmitting the subframe including the allocated IMR to the terminal.

2. The method of claim 1, wherein the IMR is allocated at the REs where other signals are not mapped when the subframe does not include the CRS.

3. The method of claim 1, wherein the IMR is allocated, when the subframe includes the CRS, at the REs where other signals including the CRS are not mapped.

4. The method of claim 1, wherein the IMR is allocated, when the subframe includes new DeModulation Reference Signals (DMRS), at the REs where other signals including the new DMRS are not mapped.

5. The method of claim 4, wherein the IMR is arranged symmetrically in a first slot and a second slot of the subframe.

6. An interference measurement method of a terminal receiving subframes including, or not including, Cell-specific Reference Signals (CRS) in a wireless communication system, the method comprising:

determining whether a base station supports a New Carrier Type (NCT) subframe;

receiving information on Interference Measurement Resources (IMR) from the base station at Resource Elements (REs) where other signals are not mapped in the subframe;

receiving the subframe including the allocated IMR from the base station;

measuring interference using the IMR; and

reporting a measurement report to the base station.

7. The method of claim 6, wherein the IMR is allocated at the REs where other signals are not mapped when the subframe does not include the CRS.

8. The method of claim 6, wherein the IMR is allocated, when the subframe includes the CRS, at the REs where other signals including the CRS are not mapped.

9. The method of claim 6, wherein the IMR is allocated, when the subframe includes new DeModulation Reference Signals (DMRS), at the REs where other signals including the new DMRS are not mapped.

10. The method of claim 9, wherein the IMR is arranged symmetrically in a first slot and a second slot of the subframe.

11. A base station for supporting interference measurement in a wireless communication system using subframes including, or not including, Cell-specific Reference Signals (CRS), the base station comprising:

a radio communication unit which transmits and receives subframes to and from a terminal; and

a controller configured to control determining whether a terminal supports a New Carrier Type (NCT) subframe, allocating, when the terminal supports the NCT subframe, Interference Measurement Resources (IMR) to the terminal at Resource Elements (REs) where other signals are not mapped in the subframe, transmitting information on the allocated IMR to the terminal, and transmitting the subframe including the allocated IMR to the terminal.

12. The base station of claim 11, wherein the controller allocates the IMR at the REs where other signals are not mapped when the subframe does not include the CRS.

13. The base station of claim 11, wherein the controller allocates, when the subframe includes the CRS, the IMR at the REs where other signals including the CRS are not mapped.

14. The base station of claim 11, wherein the controller allocates, when the subframe includes new DeModulation Reference Signals (DMRS), the IMR at the REs where other signals including the new DMRS are not mapped.

15. The base station of claim 14, wherein the controller arranges the IMR symmetrically in a first slot and a second slot of the subframe.

16. A terminal for measuring interference in a wireless communication system using subframes including, or not including, Cell-specific Reference Signals (CRS), the terminal comprising:

a radio communication unit which transmits and receives subframes to and from a base station;

a controller which controls determining whether a base station supports a New Carrier Type (NCT) subframe, receiving information on Interference Measurement Resources (IMR) from the base station at Resource Elements (REs) where other signals are not mapped in the subframe, receiving the subframe including the allocated IMR from the base station, measuring interference using the IMR, and reporting a measurement report to the base station.

17. The terminal of claim 16, wherein the IMR is allocated at the REs where other signals are not mapped when the subframe does not include the CRS.

18. The terminal of claim 16, wherein the IMR is allocated, when the subframe includes the CRS, at the REs where other signals including the CRS are not mapped.

19. The terminal of claim 16, wherein the IMR is allocated, when the subframe includes new DeModulation Reference Signals (DMRS), at the REs where other signals including the new DMRS are not mapped.

20. The terminal of claim 19, the IMR is arranged symmetrically in a first slot and a second slot of the subframe.