Scheduling schemes of time and frequency resource allocation for interference coordination method based on user priority in LTE-femtocell

Abstract

Using femtocell in LTE with small coverage area is considered have more effective performance than Macro BTS (eNB). However, using femtocells (HeNB) in LTE will make interference problem among femtocell (HeNB) to the Macro BTS (eNB). Femtocell is a source of interference for users who cannot access it. Therefore it is necessary for interference coordination methods among the HeNB and eNB. The methods are ICIC (Intercell Interference Coordination) and eICIC (enhanched Intercell Interference Coordination). ICIC method is using frequency resource allocation that allocating every user in different subcarrier. eICIC method is allocating almost blank subframe (ABS) in time domain resource for macro user that got interference from femtocell (HeNB). Simulation result in frequency resource allocation using ICIC method can increase SINR 43.04 % and throughput 23.09 %. However using eICIC method in time domain resource can increase performance of SINR 54.32 % and throughput 74.78 % that is better than frequency resource allocation.