Performance Analysis of Resource Allocation with Successive group in Dense Femtocell Networks

Abstract

To mitigate the uplink co-tier interference in heterogeneous networks, advanced receivers are used by Femtocell Base Stations. Orthogonal frequency allocation in interfering cells leads to inefficient spectrum usage. The users can opportunistically access the resources of nearby cells by exploiting the advantage of successive group decoder. Multi cell uplink spectrum allocation with SGD is formulated as a joint channel, rate and decoding group allocation problem. A greedy algorithm is proposed to maximize the weighted sum rates of variable bit rate users while meeting the rate requirements of guaranteed bit rate users. This greedy algorithm allows opportunistic transmission on nearby cell channels by GBR users and utilise interference free channels for high-rate transmission of VBR users. It also focuses on reducing the complexity of decoder design and improving the throughput gain over the conventional orthogonal spectrum allocation.