| 摘要 |
Provided in the present invention is a method for avoiding downlink interference between an indoor DAS system and a small base station, the steps comprising: step 1: determining an initial access RU, and establishing a signal strength table; step 2: the DAS system, by means of the chosen RU, attempts to establish a downlink with a UE1, and detects the signal to interference plus noise ratio (SINR) value of the downlink signal of UE1, and comparing same with a preset threshold value γ1; step 3: the UE1 maintains one or a plurality of RU downlinks assigned thereto by the DAS system, during the communication process continuously detects an SINR value at a set time interval, and on the basis of whether same is greater than γ1, ensures a corresponding service quality. The beneficial effects of the present invention are: (1) not needing to establish a coordination mechanism (sharing information) between the DAS system and the small base station, reducing the feedback link demands; (2) the present invention does not require the small base station to participate in the operation, facilitating a home user or a SOHO user independently selecting small base stations of different brands and different functions; (3) on the basis of the SINR value, adaptively selecting the number of RU, reducing the complexity of channel estimation and pre-encoding, and making the system performance remain stable, facilitating the fixing of encoding and modulation module parameters; and (4) is suitable for small base stations without an X2 interface, satisfying the plug and play requirements for small base stations. |
