Method, device and system for assigning ACK channels to users

摘要

A method for assigning acknowledgement (ACK) channels to a user is used to feed back ACKs of a plurality of downlink sub-frames in one uplink sub-frame. According to the method, reserved ACK channels are divided into blocks according to the number of downlink sub-frames; each downlink sub-frame corresponds to one block; each block is divided into several sub-blocks; control channel element (CCE) sets within the same sub-frame are respectively mapped to different sub-blocks; and the ACK channels are assigned to the downlink sub-frames according to a sequence of increasing a mapping label d first and then increasing a sub-block label m. Thus, more unused ACK channels can be released to form resource blocks (RBs) for transmission on other channels, for example, for PUSCH transmission. Other methods for assigning ACK channels to a user, a device for assigning ACK channels to a user, and a communication system are further provided.

主权项

1. A method for assigning ACK channels to a user, which is used to feed back ACKs of N downlink sub-frames in one uplink sub-frame, the method comprising:
dividing reserved ACK channels into N blocks, each downlink sub-frame of the N downlink sub-frames corresponding to one block in a preset sequence, wherein the preset sequence is a sequence that a special sub-frame is placed at a last position, or the preset sequence is a sequence that the sub-frame with the maximum actual value of n is placed at a foremost position; dividing each block into max{Mi} or Mi sub-blocks, the sub-blocks belonging to different blocks being interleaved and sub-blocks which are from the different blocks and mapped to a same control channel element, CCE, set of different sub-frames are arranged sequentially according to the preset sequence; and assigning the ACK channels to the downlink sub-frames by mapping CCE sets with labels of {0, 1, . . . , NCCE,1−1}, {NCCE,1, NCCE,1+1, . . . , NCCE,2−1}, . . . , {NCCE,max{Mi}−1, NCCE,max{Mi}−1+1, . . . , NCCE,max{Mi}−1} within each downlink sub-frame to the max{Mi} sub-blocks of the block associated with downlink sub-frame of label i; or assigning (b) the ACK channels to the downlink sub-frames by mapping CCE sets with labels of {0, 1, . . . , NCCE,1−1}, {NCCE,1+1, . . . , (NCCE,2−1)}, . . . , {NCCE,Mi−1, NCCE,Mi−1+1, . . . , NCCE,Mi−1} within each downlink sub-frame to the Mi sub-blocks of the block associated with downlink sub-frame of label i;wherein the N is a positive integer, the Mi represents a maximum possible value of n for a downlink sub-frame with a label of i among N downlink sub-frames, the i=0, 1, . . . , N−1, the max{Mi} represents a maximum value of Mi, the NCCE,max{Mi} represents the number of CCEs in the downlink sub-frame when n is equal to max{Mi}, the NCCE,Mi represents the number of CCEs in the downlink sub-frame when n is equal to Mi, the n is the number of symbols occupied by a physical downlink control channel, PDCCH.