Processing method, device and system for PDCCH (Physical Downlink Control Channel) in multi-carrier system

Abstract

The embodiment of the invention discloses a processing method, a processing device and a processing system for a PDCCH (Physical Downlink Control Channel) in a multi-carrier system, which can obtain good effects on the aspects of controlling signaling expenses, reducing the blind detection times of UE (User Equipment), reducing PDCCH loss state and the like. The method provided by the embodiment of the invention comprises the steps of distributing PDCCH of the UE onto all or part of downlink carriers corresponding to the uplink carriers of the UE according to the uplink carrier configuration information of the UE, selecting the uplink carriers of the UE corresponding to the downlink carriers distributed by the PDCCH through the UE so as to conduct ACK (Acknowledgement Character) / NACK (Negative Acknowledgement) feedback; and adopting combined encoding PDCCH with dynamic length according to the maximum parts of control information contained by the combined encoding PDCCH signaling of the UE, and conducting the blind detection of the combined encoding PDCCH signaling by the UE according to contained maximum parts of control information.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a processing method, device and system for a Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) in a multi-carrier system. Background technique [0002] In the Long Term Evolution (Long Term Evolution) system, the minimum time unit for base station (eNB, Evolved NodeB) scheduling is a subframe, with a length of one millisecond, and the scheduled terminal (UE, User Equipment) is within each subframe Each contains its own control channel. Wherein, the physical downlink control channel sent by the eNB includes two kinds of indication signaling, that is, downlink scheduling grant (DL_grant) and uplink scheduling grant (UL_grant). The PDCCH channel of all UEs is shared in each downlink subframe, and the UE uses its own specific scrambling code to perform blind detection on any transmission possibility of PDCCH in a given search space, ...

AI Technical Summary

Problems solved by technology

Therefore, the LTE-A UE needs to perform blind detection on the PDCCH on each aggregated carrier similar to the LTE UE on this carrier, which will make the number of blind detections increase linearly with the increase in the number of aggregated carriers; the increase in the number of PDCCHs also increases There will be many states to distinguish which PDCCH is lost, which is not conducive to uplink information feedback; and in terms of control signaling overhead, the PDCCH separate coding scheme will cause the specific information indication bits in each PDCCH to be sent independently, which is not conducive to control signaling. Compress and optimize resources

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