Abstract:
In order to mitigate inter-femtocell interference (IFI) and utilize spectrum resource efficiently, this paper proposes a dynamic clustering-based sub-band allocation sche...Show MoreMetadata
Abstract:
In order to mitigate inter-femtocell interference (IFI) and utilize spectrum resource efficiently, this paper proposes a dynamic clustering-based sub-band allocation scheme (DCCSA). Firstly, DCCSA constructs a weighted interference graph base on the user measurement report mechanism. Secondly, according to the interference graph, the disjoint IFI-minimizing clusters are formed by a Max k-Cut clustering algorithm. Thirdly, a SINR- maximizing heuristic algorithm assigns sub-bands to each cluster. Finally, due to the time variation characteristic of the femtocell networks, a cognitive sub-band self-management mechanism is provided, especially to allocate the sub-band for the newly added femtocell, a reuse entropy based hybrid centralized/distributed interference-aware sub-band allocation algorithm is presented. Simulation results show that the DCCSA scheme can improve the throughput of femtocells and suppress the IFI significantly while guarantee the required QoS.
Date of Conference: 06-09 May 2012
Date Added to IEEE Xplore: 16 July 2012
ISBN Information: