Long term evolution (LTE) downlink control information channel resource allocation method and base station

Abstract

The invention relates to a long term evolution (LTE) downlink control information channel resource allocation method and a base station. The method includes that the base station issues resource scheduling information to a physical layer through a media access control (MAC) layer, a search space which resources to be allocated belong to is judged according to the scheduling information, and resource allocation of a current downlink information channel is performed according to the quality level of the current downlink information channel when the resources to be allocated belong to a user equipment (UE) special search space. The LTE downlink control information channel resource allocation method and the base station can dynamically and reasonably allocate physical downlink control channel (PDCCH) resources according to the quality of downlink information channels, and can further obtain the quality level of the downlink information channels through channel quality indication (CQI) fed back by the UE or block error ratio (BLER) of a hybrid auto repeat request (HARQ) or measurement results of uplink information channels. Therefore, reasonable use ratio of downlink resources is improved, resources occupied by control information channels are reduced, more information channel resources can be reserved to be used for business transmission, or more users can be scheduled on the basis of resources occupied by the control information channels, and accordingly performance of the integral system is improved and capacity of the system is increased.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to an LTE (Long Term Evolution, long term evolution) downlink control channel resource allocation method and a base station. Background technique [0002] PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) is a very important downlink physical channel in the LTE system. This channel transmits downlink control information and can be used for UE (User Equipment, user equipment) PUSCH (Physical Uplink Shared Channel, physical uplink shared channel) scheduling and allocation of occupied resources, and can also be used to inform the UE of the modulation mode and resource occupancy of service data related to it on the PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel), so as to realize the UE's Correct reception and decoding of data, etc. The number of OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Div...

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Problems solved by technology

At the same time, the protocol also stipulates the corresponding relationship between the PDCCH format, the number of CCEs, REG (Resource-ElementGroups) and the number of PDCCH bits, but the protocol does not stipulate the DCI (Downlink control information, downlink control information) format and CCE of the PDCCH, etc. Correspondence

Therefore, the PDCCH resource allocation method in the prior art cannot make reasonable use of existing resources, which affects the overall performance of the system.

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