Method for transmitting and receiving a comp reference signal in a multi-cell environment

摘要

Disclosed is a channel estimation method using a cooperative multi-point (CoMP) reference signal in a multi-cell environment. The method comprises a CoMP reference signal receiving step of enabling a terminal to receive, from each of the cells that perform a CoMP operation, a CoMP reference signal where an orthogonal code is applied to each of the cells; a channel estimation step of enabling the terminal to estimate, using said CoMP reference signal, channels of each of the cells which perform said CoMP operation; and a channel status feedback information transmitting step of enabling the terminal to transmit channel status feedback information to each of the cells.

主权项

1. A method for receiving CoMP RSs (Cooperative Multi-Point Reference Signals) from CoMP cells at a user equipment (UE) in a multi-cell environment, the method comprising:
receiving, from the CoMP cells transmitting a same data jointly, reference signals comprising Common Reference Signals (CRSs) and the CoMP RSs, wherein orthogonal codes are applied to the CoMP RSs for mutual orthogonality among the CoMP RSs; and processing the received CoMP RSs using the orthogonal codes applied by distinguishing the CoMP cells from one another, wherein the orthogonal codes are applied to the CoMP RSs on a slot unit or on a symbol unit, and wherein whether to apply the orthogonal codes on the slot unit or on the symbol unit is determined based on a speed of the UE in the CoMP cells, and wherein positions of the CoMP RSs are fixed among the CoMP cells while positions of the CRSs are variable among the CoMP cells.