Method for configuring physical downlink control channel, base station and user equipment

Abstract

The invention provides a method for configuring physical downlink control channel (PDCCH), a base station and user equipment (UE). The base station configures a PDCCH on each subframe of each member carrier in aggregated carriers by adopting the pre-established scheduling relationship, wherein the scheduling relationship ensures at least one PDCCH is not on the same member carrier with the resources scheduled by the PDCCH. The base station of the invention can allocate the member carrier suitable for data transmission for the UE according the actual demand and configure the resource scheduling information of the member carrier in the PDCCH monitored by the UE, thus having higher scheduling flexibility. Only one PDCCH is configured on one member carrier, thus dispensing with changing the format of original PDCCH signaling, maximally reusing design of the long term evolution (LTE) system and reducing the blind detection complexity of the UE.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a method for configuring a downlink physical control channel, a base station and a user terminal. Background technique [0002] In the Long Term Evolution (LTE) system and its previous wireless communication systems, one cell can only correspond to one carrier, and usually the maximum bandwidth of the carrier is 20 MHz. In the Enhanced Long Term Evolution (LTE-A) system proposed later, the peak rate requirements of the system have been greatly improved compared with the LTE system, requiring 1 Gbps downlink and 500 Mbps uplink. The 20MHz of a carrier can no longer meet the demand. Therefore, the carrier aggregation (CA, Carrier Aggregation) technology is introduced in the LTE-A system, that is, multiple continuous or discontinuous carriers are aggregated together in a cell to serve UE simultaneously. , the aggregated multiple carriers are usually referred to as componen...

AI Technical Summary

Problems solved by technology

However, since multiple PDCCHs are configured on one component carrier, in order to distinguish which component carrier each PDCCH is used to schedule, a new downlink control information (DCI, Downlink Control Information) format needs to be added to the PDCCH to indicate the scheduled component Correspondingly, the UE needs to perform blind detection on each PDCCH, which increases the complexity of the blind detection of the UE; because multiple PDCCHs are configured on a component carrier, it is difficult to allocate physical resources in the control area of ​​the component carrier, and it is necessary to change The format of the original PDCCH to indicate the scheduled component carrier

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