Physical downlink control channel (PDCCH) resource configuration application method and apparatus thereof

Abstract

The invention relates to the communication field and discloses a physical downlink control channel (PDCCH) resource configuration application method and an apparatus thereof which are used to reduce a blocking probability of the PDCCH in a system. The method is characterized in that: a base station and UE combine a LTE carrier wave set of UE configuration and carrier aggregation (CA) capability information of the UE so as to determine a candidate PDCCH number under each control channel element (CCE) aggregation level in a PDCCH search space corresponding to the each LTE carrier wave and in the LTE carrier wave set; and then the base station can send DCI to the UE on the determined candidate PDCCH; the UE can perform blind detection on the determined candidate PDCCH so as to obtain the DCI issued by the base station. Therefore, the total numbers of the PDCCH blind detection actually executed by the UE can be substantially raised under a scope allowed by UE ability. PDCCH obstruction can be avoided to be generated and system performance can be improved. The total numbers of the PDCCH blind detection actually executed by the UE do not exceed the maximum PDCCH blind detection numbers.

Description

technical field [0001] The present invention relates to the communication field, in particular to a PDCCH resource configuration and application method and device. Background technique [0002] In the LTE (Long Term Evolution, Long Term Evolution) Rel 8 system, the terminal needs to simultaneously perform blind detection on a PDCCH (physical downlink control channel, physical downlink control channel) in the common search space and the UE-specific search space. In the common search space, the CCE (Control Channel Element) aggregation levels of PDCCH can only be 4 and 8. Correspondingly, under each CCE aggregation level, the number of candidate PDCCHs requiring blind detection is 4 and 8 respectively. 2; In the UE-specific search space, the CCE aggregation levels of PDCCH can be 1, 2, 4, and 8; and under each CCE aggregation level, the number of candidate PDCCHs that need blind detection is different, in 3GPPTS36. The description is given in 9.1.1 of 213, as shown in Table 1...

AI Technical Summary

Problems solved by technology

[0044] It can be seen that in the PDCCH search space defined in the LTE-A system, regardless of the CA aggregation capability of the UE, the size of the PDCCH search space agreed between the UE and the network side is always related to the CCs included in the PDSCH / PUSCH CC set. The maximum number of blind detection times supported by the UE is not fully utilized. With the development of smart terminal technology, the blind detection capability of the UE is increasing. If the PDCCH search space is still configured for the UE in the traditional way, it will cause a gap between the UE capability and the PDCCH resource. Mismatch; especially in the case of a large number of UEs, configuring the PDCCH search space according to the traditional method will cause PDCCH blocking, reduce system throughput, and affect system performance

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