Optimal Relay Deployment in Bidirectional AF Relaying Systems

Abstract

Recently, the node deployment problem of a relay network has brought a hot discussion. This paper studies utility function minimum maximization problem of bidirectional amplify and forward relaying systems from the perspective of relay deployment. Since many optimization problems are considered separately, different algorithms are proposed for each optimization problem. So we consider a unified utility function instead of the separate optimization goals. Two different optimization problems are considered. One is to find the optimal relay deployment and optimize the utility function with fixed power allocation. The other is joint optimization of relay deployment and power allocation. Especially when power is fixed, the relay deployment is not a fixed location, but a piecewise function. In order to balance the two opposite transmission directions in bidirectional relaying networks, the relay deployment is related to channel gain and path loss. In addition, approximate and accurate expressions of average relay deployment are investigated when only statistical channel information is available. Simulation results validate that the reasonable relay deployment improves the system performance. INDEX TERMS Bidirectional relaying, relay deployment, power allocation.

Improving Quality of Service for Cell-Edge Users in D2D-Relay Networks

“…They have developed a greedy search (GS) algorithm to enhance system performance. Moreover, some interesting works focusing on relay deployment are investigated in [11] and [12]. The authors in [11] analyze the rule of relay movement and prove that the system performance is greatly improved by reasonable relay deployment.…”

“…Moreover, some interesting works focusing on relay deployment are investigated in [11] and [12]. The authors in [11] analyze the rule of relay movement and prove that the system performance is greatly improved by reasonable relay deployment. The work [12] proposes an optimal relay deployment algorithm to maximize the coverage of the network, keeping the signal-to-interference ratio (SINR) with constrained energy efficiency.…”

Design of Control, Filling and Recording of Gallons in Auto Refill Water Depot

“…By utilizing iron-based coil that is flowing with electric current, will certainly produce a magnetic field at the tip of the iron core if the coil is overflowing the electric current. [11] The magnetic field is used to work on the switch later. The Relay consists of 3 main parts, namely.…”

Improving quality of service for cell-edge user in D2D-relay networks

“…They have developed a greedy search (GS) algorithm to enhance outage performance. The paper [2] investigated utility function minimum maximization issue of bidirectional amplify and forward relaying systems from relay deployment and chose unified utility function rather the separated optimization goals. Fahd et al [3] improved relay selection and transmit power at the relay to maximize the sum-throughput of the network subject to a minimum throughput requirement of each hop and transmit power constraint.…”