A novel spectrum allocation scheme in femtocell networks using improved graph theory
Journal Title: EAI Endorsed Transactions on Cognitive Communications - Year 2017, Vol 3, Issue 12
Abstract
In this paper, we propose a novel spectrum allocation scheme by using graph coloring and taking QoS thresholds into account. The goal of our proposed method is to reduce interference among femtocells deployed densely and improve spectral efficiency after reaching user’s QoS threshold. We design an interference-based graph model by detecting terminals’ transmit power between femtocell stations and classifying the interference levels according to the coloring algorithm. Spectrum resource is allocated based on the QoS requirement of each user in a centralized way. Unlike other spectrum allocation method using graph theory, we take many significant factors into account in this paper in order to attain a more practical spectrum optimization solution. The simulation results show that when the scheme is deployed in femtocells with high density, it can effectively reduce the interference within same layer and improve system capacity along with spectrum efficiency.
Authors and Affiliations
Feng Li, Lili Yang
Keywords
Related Articles
- EP ID EP45673
- DOI http://dx.doi.org/10.4108/eai.13-12-2017.154701
- Views 274
- Downloads 0
Cross-Layer Design for Two-Way Relaying Networks with Multiple Antennas
In this paper, we developed a cross-layer design for two-way relaying (TWR) networks with multiple antennas, where two single antenna source nodes exchange information with the aid of one multiple antenna relay node. The...
Energy/bandwidth-Saving Cooperative Spectrum Sensing for Two-hopWRAN
A two-hop wireless regional area network (WRAN) providing monitoring services operating in Television White Space (TVWS), i.e., IEEE P802.22b, may employ a great number of subscriber customer-premises equipments (S-CPEs)...
Maximization of Received Signal Power by Impedance Matching in Human Body Communication Receiver
Human body communication (HBC) utilizes human body as part of the transmission channel. The present paper deals with HBC between a transmitter worn on the user’s wrist and an off-body stationary receiver touched by the u...
Receiving more than data - a signal model, theory and implementation of a cognitive IEEE 802.15.4 receiver
Standard medium access schemes sense the channel immediately prior transmission, but are blind during the transmission. Therefore, standard transceivers have limited cognitive capabilities which are important for operati...
Consensus-based Spectrum Sensing in Cognitive Radio Networks
In this work, we analyze a distributed cooperative spectrum sensing scheme where N secondary users (SUs) of a cognitive wireless net-work make a joint decision on the primary user (PU) presence based on an agreement reac...