Abstract: Userdeployed lowpower Femtocell access points (FAPs) can provide better indoor coverage and higher data rates than conventional cellular networks. However, a major problem in this uncoordinated frequency reuse scenario is the intercell interference. In this paper, we propose a graph based distributed algorithm called fairness guaranteed cooperative resource allocation (FGCRA) to manage interference among Femtocells. Firstly, we propose a specific fairness factor obtained from twohop interference relations, to determine the lower bound amount of subchannels that each FAP can use and guarantee the fairness among Femtocells. Secondly, we propose scalable rules for distributed resource allocation and the solution to avoid the conflicts among interfering neighbors. Simulation results show that our proposed FGCRA significantly enhances both average user throughput and cell edge user throughput, and provides better fairness.

Key words: Key words: , Femtocell, resource allocation, cooperation, throughput