Method and apparatus for transmitting and receiving codebook subset restriction bitmap

摘要

A method for transmitting and receiving a codebook subset restriction bitmap is provided. The Codebook Subset Restriction (CSR) bitmap transmission method of an evolved Node B (eNB) in transmission mode 9 for communication with 8 antenna ports includes generating a CSR bitmap including bits corresponding to restricted precoding matrix indicators and rank indicators that are not allowed for reporting and transmitting the CSR bitmap to a User Equipment (UE). The CSR bitmap comprises 53 bits corresponding to a first codebook and 56 bits corresponding to a second codebook, the 53 bits corresponding to a first codebook comprise 16, 16, 4, 4, 4, 4, and 1 bits for layers 1, 2, 3, 4, 5, 6, 7, and 8, respectively, and the 56 bits corresponding to a second codebook comprise 16, 16, 16 and 8 bits for layers 1, 2, 3, and 4, respectively.

主权项

1. A method in a wireless communication system, the method comprising:
transmitting a codebook subset restriction (CSR) bitmap including bits corresponding to restricted precoding matrix indicators (PMIs) that are not allowed to be reported by a terminal; and receiving a PMI which is not included in the restricted PMIs from the terminal, wherein the CSR bitmap comprises a aƒ(1)(v)+ii-th bit corresponding to a first PMI i1 and a layer v and a a53+ƒ(2)(v)+i2-th bit corresponding to a second PMI i2 and a layer v, wherein the ƒ(1)(v) and the ƒ(2)(v) are defined as the following equations, respectively:f(1)⁡(v)={0for⁢⁢v=116for⁢⁢v=232for⁢⁢v=336for⁢⁢v=440for⁢⁢v=544for⁢⁢v=648for⁢⁢v=752for⁢⁢v=8⁢⁢and⁢⁢⁢f(2)⁡(v)={0for⁢⁢v=116for⁢⁢v=232for⁢⁢v=348for⁢⁢v=4  and wherein the ƒ(2)(V) does not include layers 5, 6, 7, and 8.