System for transmitting reference signal with information on state of channel
A reference signal (RS) transmission system to transmit a channel state information (CSI) RS for extraction of CSI to a relay and a macro terminal is disclosed. The base station transmits information on a sub frame containing the CSI RS to the relay or the macro terminal. The macro terminal and the relay receive the CSI RS using the information on the sub frame. The macro terminal and the relay extract the CSI using the CSI RS and transmit the extracted CSI to the base station.
1. A method for wireless communication, comprising:
transmitting, by an e-Node B (eNB), information of related to a plurality of Channel State Information Reference Signals (CSI-RS) to a user equipment (UE), wherein the information includes at least one parameter to determine candidate subframes;
transmitting, by the eNB, information indicating locations of a first set of subframes that satisfy a first condition to the UE;
transmitting, by the eNB, the plurality of CSI RSs to the UE using a second set of the candidate subframes that do not satisfy any of one or more predetermined conditions including the first condition, wherein a third set of the candidate subframes, including the first set of subframes, that satisfy any of the one or more predetermined conditions, including the first condition, are not used to transmit the plurality of CSI RSs by the eNB, wherein at least one of the first set of subframes comprises a first portion for control information and a second portion for data, the second portion being subsequent to the first portion in time; and
transmitting, by the eNB, data to the UE through the second portion for data of the at least one of the first set of subframes.
2. The method of claim 1 , wherein the at least one parameter indicates a transmission periodicity and an offset of the candidate subframes.
3. The method of claim 1 , wherein the first set of the subframes comprise MBSFN (Multi-Broadcast Single-Frequency Network) subframes designated for a MBMS (Multimedia Broadcast Multicast Service) service.
4. The method of claim 1 , further comprising:
transmitting information on the third set of the candidate subframes.
5. The method of claim 1 , wherein the third set of the candidate subframes comprises subframes used as a backhaul link for data reception.
6. The method of claim 1 , wherein the third set of the candidate subframes comprises special subframes.
7. A method for wireless communication, comprising:
receiving, by a user equipment (UE), information related to a plurality of Channel State Information Reference Signals (CSI-RSs) from an e-Node B (eNB), wherein the information includes at least one parameter to determine candidate subframes;
receiving, by the UE, information indicating locations of a first set of subframes that satisfy a first condition from the NB;
receiving, by the UE, the plurality of CSI-RSs from the NB using a second set of the candidate subframes that do not satisfy any of one or more predetermined conditions including the first condition, wherein a third set of the candidate subframes, including the first set of subframes, that satisfy any of the one or more predetermined conditions, including the first condition, are not used to receive the plurality of CSI-RSs by the UE, wherein at least one of the first set of subframes comprises a first portion for control information and a second portion for data, the second portion being subsequent to the first portion in time; and
receiving, by the UE, data from the NB through the second portion for data of the at least one of the first set of subframes.
8. The method of claim 7 , wherein the at least one parameter indicates a reception periodicity and an offset of the candidate subframes.
9. The method of claim 7 , wherein the first set of subframes comprise MBSFN (Multi-Broadcast Single-Frequency Network) subframes designated for a MBMS (Multimedia Broadcast Multicast Service) service.
10. The method of claim 7 , further comprising:
receiving information on the third set of the candidate subframes.
11. The method of claim 7 , wherein the third set of the candidate subframes comprises subframes used as a backhaul link for data reception.
12. The method of claim 7 , wherein the third set of the candidate subframes comprises special subframes.
13. A user equipment (UE), comprising:
a circuitry configured to:
cause the UE to receive information related to a plurality of Channel State Information Reference Signals (CSI-RSs) from an e-Node B (eNB), wherein the information includes at least one parameter to determine candidate subframes;
cause the UE to receive information indicating locations of a first set of subframes that satisfy a first condition from the eNB;
cause the UE to receive the plurality of CSI RSs from the eNB using a second set of the candidate subframes that do not satisfy any of one or more predetermined conditions including the first condition, wherein a third set of the candidate subframes, including the first set of subframes, that satisfy any of the one or more predetermined conditions, including the first condition, are not used to receive the plurality of CSI-RSs by the UE, wherein at least one of the first set of subframes comprises a first portion for control information and a second portion for data, the second portion being subsequent to the first portion in time; and
cause the UE to receive data from the NB through the second portion for data of the at least one of the first set of subframes.
14. The UE of claim 13 , wherein the at least one parameter indicates a reception periodicity and an offset of the candidate subframes.
15. The UE of claim 13 , wherein the first set of subframes comprise MBSFN (Multi-Broadcast Single-Frequency Network) subframes designated for a MBMS (Multimedia Broadcast Multicast Service).
16. The UE of claim 13 , wherein the circuitry is further configured to cause the UE to receive information on the third set of the candidate subframes.
17. The UE of claim 13 , wherein the third set of the candidate subframes comprises subframes used as a backhaul link for data reception.
18. The UE of claim 13 , wherein the third set of the candidate subframes comprises special subframes.
19. A communication apparatus, the apparatus comprising:
a circuitry configured to:
cause the apparatus to transmit information related to a plurality of Channel State Information Reference Signals (CSI-RSs) to a user equipment (UE), wherein the information includes at least one parameter to determine candidate subframes;
cause the apparatus to transmit information indicating locations of a first set of subframes that satisfy a first condition to the UE;
cause the apparatus to transmit the plurality of CSI RSs to the UE using a second set of the candidate subframes that do not satisfy any of one or more predetermined conditions including the first condition, wherein a third set of the candidate subframes, including the first condition, that satisfy any of the one or more predetermined conditions, including the first condition, are not used to transmit the plurality of CSI RSs by the apparatus, wherein at least one of the first set of subframes comprises a first portion for control information and a second portion for data, the second portion being subsequent to the first portion in time; and
cause the apparatus to transmit data to the UE through the second portion for data of the at least one of the first set of subframes.
20. The apparatus of claim 19 , wherein the at least one parameter indicates a transmission periodicity and an offset of the candidate subframes.
21. The apparatus of claim 19 , wherein the first set of subframes comprise MBSFN (Multi-Broadcast Single-Frequency Network) subframes designated for a MBMS (Multimedia Broadcast Multicast Service) service.
22. The apparatus of claim 19 , wherein the circuitry is further configured to cause the apparatus to transmit information on the third set of the candidate subframes.
23. The apparatus of claim 19 , wherein the third set of the candidate subframes comprises subframes used as a backhaul link for data reception.
24. The apparatus of claim 19 , wherein the third set of the candidate subframes comprises special subframes.
25. A device for a user equipment (UE), the device comprising:
a circuitry configured to:
cause the UE to receive information related to a plurality of Channel State Information Reference Signals (CSI-RSs) from an e-Node B (eNB), wherein the information includes at least one parameter to determine candidate subframes;
cause the UE to receive information indicating locations of a first set of subframes that satisfy a first condition from the eNB;
cause the UE to receive the plurality of CSI RSs from the NB using a second set of the candidate subframes that do not satisfy any of one or more predetermined conditions including the first condition, wherein a third set of the candidate subframes, including the first set of subframes, that satisfy any of the one or more predetermined conditions, including the first condition, are not used to receive the plurality of CSI-RSs by the UE, wherein at least one of the first set of subframes comprises a first portion for control information and a second portion for data, the second portion being subsequent to the first portion in time; and
cause the UE to receive data from the NB through the second portion for data of the at least one of the first set of subframes.
26. The device of claim 25 , wherein the at least one parameter indicates a reception periodicity and an offset of the candidate subframes.
27. The device of claim 25 , wherein the first set of subframes comprise MBSFN (Multi-Broadcast Single-Frequency Network) subframes designated for a MBMS (Multimedia Broadcast Multicast Service) service.
28. The device of claim 25 , wherein the circuitry is further configured to cause the UE to receive information on the third set of the candidate subframes.
29. The device of claim 25 , wherein the third set of the candidate subframes comprises subframes used as a backhaul link for data reception.
30. The device of claim 25 , wherein the third set of the candidate subframes comprises special subframes.