International Journal of Informatics and Communication Technology (IJ-ICT) Vol.10, No.1, April 2021, pp. 27~36 ISSN: 2252-8776, DOI: 10.11591/ijict.v10i1.pp27-36  27 Journal homepage: http://ijict.iaescore.com Performance enhancement of relays used for next generation wireless communication networks Saraju Prasad Padhy 1 , Madhusmita Panda 2 , Srinivas Sethi 3 , Aruna Tripathy 4 1 Assistant General Manager, Bharat Sanchar Nigam Limited, Gangtok, India 2 Department of ECE, S 'O' A University, Bhubaneswar, India 3 Department of CSE & A, Indira Gandhi Institute of Technology, Sarang, India 4 Department of Instrumentation and Electronics, College of Engineering and Technology, Bhubaneswar, India Article Info ABSTRACT Article history: Received Dec 18, 2019 Revised Apr 29, 2020 Accepted Feb 8, 2021 Relaying is one of the latest communication technologies developed for wireless networks like WiMAX, LTE Advanced and 5G Ultra Reliable Low Latency Communication (URLLC) networks to provide coverage extension as well as higher bitrates for cell edge users. Thus they are included in the design of next generation wireless communication systems to provide performance improvement in terms of coverage and capacity over their predecessors. Other promising features of this technology include easy to implement and reduction in deployment cost. The objective of this paper is to analyze both cooperative and non-cooperative relaying techniques in the Infinite Block length regime and findout the benefits of Relay implementation. A single Amplify and Forward (A&F) Relay is used for this purpose. Reduction in power requirement for Simple Relay is shown in comparison to the direct transmission, using experimental analysis with Matlab simulation. SER (Symbol error rate) is calculated at the receiver for no relay, simple Relay and Cooperative Relaying scenario to show the improvements of cooperative Relaying implementation.The performance enhancement of the Relay is then carried out using Particle Swam Optimization (PSO) optimization technique where allocation of power between Base station and Relay Node is effectively distributed for optimum performance. Keywords: Cooperative relaying LTE advanced Optimization PSO Relay This is an open access article under the CC BY-SA license. Corresponding Author: Saraju Prasad Padhy Assistant General Manager Bharat Sanchar Nigam Limited Qr No-5, Type-5, Postal Colony, Bhubaneswar, India Email: sppadhy71@gmail.com 1. INTRODUCTION As per International Mobile Telecommunication (IMT) standards the 4 th generation wireless commu- nication also termed as Long-Term Evolution Advanced (LTE-A) or 4G can support bit rate of 1 Gbps for fixed wireless application or low mobility cases upto 10 kmph. It can support bit rate upto 100 Mbps for high mobility environment upto 350 kmph. The transmission Bandwidth can go upto to 100MHz where as spectral efficiency for downlink can be upto 15 b/s/Hz and that of uplink can be upto 6.75 b/s/Hz respectively [1]. Considering average data rate per active subscriber to be 512 kbps, number of subscribers per MHz can be 13 (6.75/0.5) to 30 (15/0.25). To achieve these requirements prescribed by International Telecommunication Union (ITU) LTE-A standardization work has been introduced by the third Generation