Method and apparatus for transmitting or receiving an additional demodulation reference signal based on a channel state information reference signal resource pattern

摘要

A method for transmitting a second demodulation reference signal added to support an additional antenna port (referred to as a “second antenna” hereinafter) in a downlink subframe having an extended cyclic prefix (CP), in which a resource (referred to as a “first resource pattern” hereinafter) to which a first demodulation reference signal will be mapped is configured, through a predetermined number of antenna ports (referred to as a “first antenna” hereinafter) in a wireless communication system includes: specifying positions of resources to which a channel state information reference signal (CSI-RS) is mapped in subframe(s) in which the CSI-RS is not transmitted and a subframe in which the CSI-RS is transmitted on the basis of CSI-RS configuration information; selecting a resource (referred to as a “second resource pattern” hereinafter) to which the second demodulation reference signal will be mapped from resources of the subframe(s) in which the CSI-RS is not transmitted, the resources corresponding to the positions of the resources to which the CSI-RS is mapped; and mapping the second demodulation reference signal to the second resource pattern.

主权项

1. A method in a downlink subframe with an extended cyclic prefix (CP), in which a resource to which a first resource pattern for mapping a first demodulation reference signal (DM-RS) is configured, through a first set of antenna ports in a wireless communication system, the method for transmitting a second DM-RS which is mapped to different resources to which the first DM-RS is mapped, the second DM-RS being added to support a second set of antenna ports to a user equipment (UE), the method comprising:
specifying subframe(s) in which a channel state information reference signal (CSI-RS) is not transmitted and positions of resources to which the CSI-RS is mapped in subframe(s) in which the CSI-RS is transmitted based on CSI-RS configuration information; selecting a second resource pattern for mapping the second DM-RS from among resources, corresponding to the specified positions of the resources, in the subframe(s) in which the CSI-RS is not transmitted; and mapping the second DM-RS to the second resource pattern in the subframe(s) in which the CSI-RS is not transmitted.