Interference Suppression Algorithm Study In Femtocell Network Based On LTE

Because of the LTE coverage problems of building, emerging femtocelltechnology solved the coverage problems of indoor. Howerev, after deployingfemtocell, interference problem become more serious between femtocell and macronetwork as well as between femtocell and femtocell. Therefore, the industry focus onthe interference problem. The purpose of paper is that how reasonable controltransmission power of femtocell and reduce interference to adjacent FUE.This paper presents three algorithm of power control, which study it fromdifferent way of adjusting femtocell transmission power, and simulated respectively.The results show that the presented algorithm of power control is better to control therange of SINR, increase the average throughput of FUE, and also reduce the overalltransmission power of femtocell. It can be know that the three algorithms haveadvantages and disadvantages and each algorithm was suitable for differentapplication scenarios.The work that it has been done are as follows:1). Successfully modified the network disposition of femtocell that is dualpattern, and added measuring section of link to calculate SINR of FUE, and addedblock of power control.2). Three algorithm of new power control was proposed according tospecifications and papers. There are three methods of power control, which areadaptive power control algorithm based on path loss of FUE, method of power controlbased on interference level of femtocell and power control algorithm based on pathloss of interference FUE；And each of simulation conditions under the three algorithmof power control was simulated, added up and analyzed results of various simulationconditions. The results show that the presented algorithm of power control is better tocontrol the range of SINR, increase the average throughput of FUE, and also reducethe overall transmission power of femtocell.