Method for processing CSI-RS in wireless communication system
A method for processing a Channel State Information Reference Signal (CSI-RS) in a wireless communication system based on a multiple access scheme is provided. The CSI-RS transmission method defines a plurality of CSI-RS patterns, assigns the CSI-RS patterns to individual cells, uses the CSI-RSs alternately per Physical Resource Block (PRB) so as to utilize the transmission powers of all antenna ports for transmitting CSI-RSs, transmits Coordinated Multi Point (CoMP) CSI-RSs and non-CoMP CSI-RSs separately, and mutes specific resources in association with the CSI-RS pattern of adjacent cells.
1. A method for mobile communication by a User Equipment (UE), comprising:
receiving first information and second information, the first information related to first Channel State Information Reference Signal (CSI-RS) and the second information indicating a muting position of a resource element within a resource block, a muting subframe interval, and a subframe offset;
determining a first subframe in which a resource element is to be muted based on the muting subframe interval and the subframe offset; and
receiving a first signal based on the muting position in the determined first subframe when the first signal includes a Physical Downlink Shared Channel (PDSCH).
2. The method of claim 1 , wherein the first information indicates a CSI-RS transmission interval, a CSI-RS transmission subframe offset, a CSI-RS position, and a number of CSI-RS antenna ports.
3. The method of claim 2 , further comprising:
determining a second subframe in which the first CSI-RS is transmitted based on the CSI-RS transmission interval and the CSI-RS transmission subframe offset; and
receiving a second signal based on the CSI-RS position and the number of CSI-RS antenna ports in the second subframe in which the first CSI-RS is transmitted.
4. The method of claim 1 , further comprising:
receiving third information, wherein the third information is related to a second CSI-RS.
5. The method of claim 4 , wherein the first information indicates a first CSI-RS transmission interval, a first CSI-RS position, and a number of the first CSI-RS antenna ports and the third information indicates a second CSI-RS transmission interval, a second CSI-RS position, and a number of the second CSI-RS antenna ports.
6. The method of claim 5 , further comprising:
determining a subframe in which at least one of the first CSI-RS and second CSI-RS is transmitted based on the first CSI-RS transmission interval and the second CSI-RS transmission interval; and
receiving a second signal based on the first CSI-RS position and the number of the first CSI-RS antenna ports in the subframe in which the first CSI-RS is transmitted, and receiving a third signal based on the second CSI-RS position and the number of the second CSI-RS antenna ports in the subframe in which the second CSI-RS is transmitted.
7. A method for mobile communication by a base station, comprising:
generating first information and second information, the first information related to first Channel State Information Reference Signal (CSI-RS) and the second information indicating a muting position of a resource element within a resource block, a muting subframe interval, and a subframe offset;
transmitting the first information and the second information; and
transmitting a first signal based on the muting position in a first subframe in which a resource element is to be muted based on the muting subframe interval and the subframe offset when the first signal includes a Physical Downlink Shared Channel (PDSCH).
8. The method of claim 7 , wherein the first information indicates a CSI-RS transmission interval, a CSI-RS transmission subframe offset, a CSI-RS position, and a number of CSI-RS antenna ports.
9. The method of claim 8 , further comprising:
transmitting a second signal based on the CSI-RS position and the number of CSI-RS antenna ports in a second subframe in which the first CSI-RS is transmitted based on the CSI-RS transmission interval and the CSI-RS transmission subframe offset.
10. The method of claim 7 , further comprising:
receiving third information, wherein the third information is related to a second CSI-RS.
11. The method of claim 10 , wherein the first information indicates a first CSI-RS transmission interval, a first CSI-RS position, and a number of the first CSI-RS antenna ports and the third information indicates a second CSI-RS transmission interval, a second CSI-RS position, and a number of the second CSI-RS antenna ports.
12. The method of claim 11 , further comprising:
transmitting a second signal based on the first CSI-RS position and the number of the first CSI-RS antenna ports in the subframe in which the first CSI-RS is transmitted, and transmitting a third signal based on the second CSI-RS position and the number of the second CSI-RS antenna ports in the subframe in which the second CSI-RS is transmitted.
13. A User Equipment (UE), comprising:
a receiver for receiving first information and second information, the first information related to first Channel State Information Reference Signal (CSI-RS) and the second information indicating a muting position of a resource element within a resource block, a muting subframe interval, and a subframe offset; and
a controller for determining a first subframe in which a resource element is to be muted based on the muting subframe interval and the subframe offset,
wherein the receiver receives a first signal based on the muting position in the determined first subframe when the first signal includes a Physical Downlink Shared Channel (PDSCH).
14. The UE of claim 13 , wherein the first information indicates a CSI-RS transmission interval, a CSI-RS transmission subframe offset, a CSI-RS position, and a number of CSI-RS antenna ports.
15. The UE of claim 14 , wherein
the controller determines a second subframe in which the first CSI-RS is transmitted based on the CSI-RS transmission interval and the CSI-RS transmission subframe offset; and
the receiver receives a second signal based on the CSI-RS position and the number of CSI-RS antenna ports in the second subframe in which the first CSI-RS is transmitted.
16. The UE of claim 13 , wherein the receiver receives third information, wherein the third information is related to a second CSI-RS.
17. The UE of claim 16 , wherein the first information indicates a first CSI-RS transmission interval, a first CSI-RS position, and a number of the first CSI-RS antenna ports and the third information indicates a second CSI-RS transmission interval, a second CSI-RS position, and a number of the second CSI-RS antenna ports.
18. The UE of claim 17 , wherein
the controller determines a subframe in which at least one of the first CSI-RS and second CSI-RS is transmitted based on the first CSI-RS transmission interval and the second CSI-RS transmission interval; and
the receiver receives a second signal based on the first CSI-RS position and the number of the first CSI-RS antenna ports in the subframe in which the first CSI-RS is transmitted, and receiving a third signal based on the second CSI-RS position and the number of the second CSI-RS antenna ports in the subframe in which the second CSI-RS is transmitted.
19. A base station, comprising:
a controller for generating first information and second information, the first information related to first Channel State Information Reference Signal (CSI-RS) and the second information indicating a muting position of a resource element within a resource block, a muting subframe interval, and a subframe offset;
a transmitter for transmitting the first information and the second information and for transmitting a first signal based on the muting position in a first subframe in which a resource element is to be muted based on the muting subframe interval and the subframe offset when the first signal includes a Physical Downlink Shared Channel (PDSCH).
20. The base station of claim 19 , wherein the first information indicates a CSI-RS transmission interval, a CSI-RS transmission subframe offset, a CSI-RS position, and a number of CSI-RS antenna ports.
21. The base station of claim 20 , wherein the transmitter transmits a second signal based on the CSI-RS position and the number of CSI-RS antenna ports in a second subframe in which the first CSI-RS is transmitted based on the CSI-RS transmission interval and the CSI-RS transmission subframe offset.
22. The base station of claim 19 , wherein the controller is configured to generate third information, and the transmitter is configured to transmit the third information, and
wherein the third information is related to a second CSI-RS.
23. The base station of claim 22 , wherein the first information indicates a first CSI-RS transmission interval, a first CSI-RS position, and a number of the first CSI-RS antenna ports and the third information indicates a second CSI-RS transmission interval, a second CSI-RS position, and a number of the second CSI-RS antenna ports.
24. The base station of claim 22 , wherein the transmitter transmits a second signal based on the first CSI-RS position and the number of the first CSI-RS antenna ports in the subframe in which the first CSI-RS is transmitted, and transmits a third signal based on the second CSI-RS position and the number of the second CSI-RS antenna ports in the subframe in which the second CSI-RS is transmitted.