Method for transmitting and receiving control channel, base station, and user equipment

摘要

The present invention provides a method for transmitting and receiving a control channel, a base station, and a user equipment. The method for transmitting a control channel includes: determining m PRB pairs used for transmitting a control channel to be transmitted; when a distributed transmission mode is used for transmission, determining an aggregation level L of the control channel to be transmitted; determining, according to the aggregation level L, a first control channel candidate at the aggregation level L; and placing control information of the control channel to be transmitted, on physical resources to which the first control channel candidate is mapped, and transmitting the control information. The present invention improves multiplexing efficiency of control channels of different modes.

主权项

1. A method for transmitting a control channel, the method comprising:
determining m physical resource block pairs used for transmitting a control channel to be transmitted, wherein an ith physical resource block pair comprises ni first physical resource elements and ki second physical resource elements, and the second physical resource elements form multiple second physical resource element groups, wherein the first physical resource elements are used for transmitting the control channel to be transmitted in a localized transmission mode, the second physical resource elements are used for transmitting the control channel to be transmitted in a distributed transmission mode, and one of the ni first physical resource elements comprises at least two second physical resource elements, wherein m≧1, ni≧1, ki≧1, 0≦i≦m−1, and m, i, ni, and ki are all integers; when the control channel to be transmitted is transmitted in the distributed transmission mode, determining an aggregation level L of the control channel to be transmitted, wherein L≧1, and L is an integer; determining, according to the aggregation level L, a number GL of second physical resource elements comprised in each of the second physical resource element groups, wherein the GL second physical resource elements comprised in each of the second physical resource element groups are located in ┌GL/q┐ first physical resource elements in the m physical resource block pairs, wherein q indicates a number of second physical resource elements comprised in one of the ni first physical resource elements, ┌GL/q┐ indicates roundup of GL/q, GL≦1, and GL is an integer; determining, according to the aggregation level L, a first control channel candidate at the aggregation level L, wherein the first control channel candidate corresponds to NL second physical resource element groups, wherein NL≧1, and NL is an integer; and placing control information of the control channel to be transmitted, on physical resources to which the first control channel candidate is mapped, and transmitting the control information.