Patent ID: 9596043
Date: 2017-03-14
CPC Classifications: H04B,H04W

Claim:
1. A quality prediction method for a physical downlink control channel of a long term evolution system, comprising: a base station determining target user equipment (UE) requiring physical downlink control channel (PDCCH) quality prediction, and receiving information reported by the target UE; the base station determining a prediction index of the target UE according to the reported information, wherein the prediction index is a signal to interference plus noise ratio (SINR) of the control channel or an equivalent reception level RP the base station determining PDCCH quality of the target UE according to the SINR or the RP wherein the base station determining the target UE requiring the PDCCH quality prediction and receiving the information reported by the target UE comprise: the base station locking the target UE in a target cell and receiving the reported information which is obtained by the target UE through measurement, wherein the reported information comprises: reference signal received power (RSRP) of a plurality of cells; and wherein the base station determining the SINR of the control channel of the target UE according to the reported information comprises: the base station dividing the RSRP of the plurality of cells into RSRP measurement of a serving cell RSRP the base station determining an actual power offset Ks of the PDCCH of the target UE relative to the Cell RS, an average power offset Kx of the PDCCH of the X-class co-channel interference adjacent cell relative to the Cell RS and an average power offset Ky of the PDCCH of the Y-class co-channel interference adjacent cell relative to the Cell RS; and the base station determining the SINR according to the following formula: where α is a ratio of RE s occupied by the Cell RS to all interference source RE s of the Y-class co-channel interference adjacent cell which are located in a control channel region, N is an additive white noise, Load CCH is an average load on the control channel of strong interfering cells, and K CCE is a polymerization degree compensation factor and is adjusted according to demodulation performance of different polymerization degrees.