Distributed resource allocation for femtocell interference coordination via power minimisation

Abstract

This paper proposes a decentralized model for the allocation of modulation and coding schemes, subchannels and transmit power to users in OFDMA femtocell deployments. The proposed model does not rely on any exchanged information between cells, which is especially useful for femtocell networks. Coordination between femtocells is achieved through the intrinsic properties of minimising transmit power independently at each cell, which leads the network to self-organize into an efficient frequency reuse pattern. This paper also provides a two-level decomposition approach for solving this intricate resource assignment problem that is able to find optimal solutions at cell level in reduced periods of time. System-level simulations show a significant performance improvement in terms of user outages and network capacity when using the proposed distributed resource allocation in comparison with scheduling techniques based on uniform power distributions among subcarriers.

QoS-based joint power and resource allocation with Adaptive Modulation and Coding for OFDMA femtocell networks

“…These AMC proposals present theoretical studies and assume fixed transmitted power. In contrast, authors in [14] introduce the AMC technique for the OFDMA-LTE network considering resource allocation and interference management context. The research consists to allocate MCS, RB and power.…”

A QoS-Based Hybrid Centralized/Distributed Resource Allocation Algorithm in Downlink Femtocell Networks

“…1. As in [10], [11], it is assumed that the spectrum used by femtocells is orthogonal to that utilized by macrocells. Therefore, we only need to focus on the co-layer interference mitigation and resource allocation.…”

“…However, in the quality of service (QoS)-aware networks [5], resource allocation must be executed taking into account QoS requirements of guaranteed performance (GP) users. The authors in [10], [11] propose a distributed resource allocation algorithm to satisfy all GP users' QoS requirements by utilizing minimal transmit power, assuming that sufficient resources are available in the femtocell networks. The authors in [12] consider maximizing the number of GP users in macrocell networks, provided that resources wouldn't suffice to satisfy all users' QoS requirements.…”

Power Control of Femto Base Station for Protecting Macrocell Users

“…Path loss model [14]. 사용자의 수신 SINR에 따른 MCS(modulation and coding scheme) 수준은 표 1과 같이 결정된다 [13] . 경로 손실 모델은 표 2와 같다 [14] .…”