Method and apparatus for transmitting and receiving channel state information reference signal in full dimension MIMO wireless communication system
AssigneesTechnology in Ariscale, LLC, Ariscale Inc.
InventorsSung Jun Yoon, Jianjun Li
Life of this patent
Estimating the term…
Abstract
A method for transmitting Channel State Information-Reference Signal (CSI-RS) by a base station includes: transmitting, to a User Equipment (UE), information indicating M CSI-RS antenna ports and resource allocation information of CSI-RS resource configured by aggregating K groups, wherein M and K are integers greater than or equal to 2, respectively; mapping CSI-RSs corresponding to the M CSI-RS antenna ports on the CSI-RS resource; and transmitting, to the UE, the mapped CSI-RSs.
Claims25
A method for transmitting a Channel State Information-Reference Signal (CSI-RS) by a base station, the method comprising:
- generating a first information representing a number of antenna ports;
- generating a second information representing a CSI-RS resource allocation, the CSI-RS resource allocation including a CSI-RS configuration indicating a location of a CSI-RS resource;
- when a total number of antenna ports used for transmission of CSI-RS is greater than a maximum number of antenna ports which the first information is able to represent:
- generating a third information representing one or more additional CSI-RS resource allocations, wherein each of one or more additional CSI-RS resource allocations includes a corresponding CSI-RS configuration indicating a location of a corresponding CSI-RS resource, and
- transmitting, to a User Equipment (UE), the first information, the second information, and the third information without explicitly signaling the total number antenna ports used for transmission of CSI-RS and without explicitly signaling a total number of CSI-RS resources;
- generating a reference sequence for the CSI-RS, the reference sequence including a pseudo random sequence;
- mapping the reference sequences on the CSI-RS resources;
- and
- transmitting, to the UE, the CSI-RS including the mapped reference sequence through the CSI RS resources,
- wherein a total number of antenna ports used for transmission of CSI-RS is determined based on the first information, the second information, and the third information.
A method for reporting channel state information by a user equipment, the method comprising:
- receiving, from a base station, a first information representing a number of antenna ports;
- receiving, from the base station, a second information representing a Channel State Information Reference Signal (CSI-RS) resource allocation, wherein the CSI-RS resource allocation includes a CSI-RS configuration indicating a location of a CSI-RS resource;
- when a total number of antenna ports used for transmission of CSI-RS is greater than a maximum number of antenna ports which the first information is able to represent, receiving, from the base station, a third information representing one or more additional CSI-RS resource allocations, wherein each of one or more additional CSI-RS resource allocations includes a corresponding CSI-RS configuration indicating a location of a corresponding CSI-RS resource;
- receiving, from the base station, CSI-RS including a reference sequence through CSI-RS resources;
- obtaining a total number of antenna ports used for transmission of CSI-RS based on the first information, the second information and the third information, wherein neither the total number of antenna ports used for transmission of CSI-RS nor the total number of CSI-RS resources is explicitly signaled from the base station;
- generating channel state information using the reference sequence received on the CSI-RS resources;
- and
- reporting the channel state information to the base station.
Dependencies are inferred from the claim text.