Optimal power allocation in multi-hop cooperative network using non-regenerative relaying protocol

Abstract

Abstract-Cooperative transmission is one of the promising techniques in wireless communication systems that enables the cooperating node in a wireless sensor network to share their radio resources by employing a distributed transmission and processing operation. This technique offers significant diversity gains as several cooperating nodes forward source node's data to the destination node over independently fading channels. The benefits offered by cooperative transmission can only be exploited fully if the power is allocated between source and cooperating nodes in an optimal manner instead of equal power allocation (EPA). Therefore, in this paper using moment generating function (MGF) approach a closed-form expression of probability of error has been derived for multi-hop cooperative network employing amplify-and-forward (AF) over rayleigh fading channel. Moreover, using two different network scenarios, optimal power allocation (OPA) scheme has been further investigated on the basis of channel link qualities between the communicating nodes. Numerical and simulation results validate the performance improvement of OPA over EPA and further the improvement due to relay location in the cooperative network.

A Survey on Energy harvested Cooperative Communication System

“…In [31], to minimize the outage performance, authors investigated a simple power allocation scheme for AF cooperative system with single relay. Based on the location of relay in the network, authors in [32] investigated power allocation scheme for multi hop relay network using moment generating function (MGF). To minimize the outage performance by improving the capacity of system for each power constrained channel, authors in [33] proposed a relay selection and power allocation scheme where in [34], authors extended the conventional power allocation scheme for multiuser cooperative system.…”

On Connectivity and Energy Efficiency for Sleeping-Schedule-Based Wireless Sensor Networks

“…On a general level, connectivity refers to the fact that any two sensor nodes in a sensor network can establish a wireless connection, exchange information, and can communicate with other nodes other than the neighbor nodes through a multi-hop mode, which is also the premise for the normal operation of the whole wireless network [11]. From the perspective of probability theory, this paper studies the relationship between the various parameters related to the connectivity, and constructs the probability analysis model of the node connectivity, and finally presents the networking algorithm called the connectivity and energy efficiency (CEE) algorithm, which can guarantee maximum connectivity probability and reduce the network energy consumption.…”