scholarly journals The Role of Delay and Connectivity in Throughput Reduction of Cooperative Decentralized Wireless Networks

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Ahmed Alkhayyat ◽  
Orhan Gazi ◽  
Sattar B. Sadkhan
Keyword(s):  
Wireless Networks ◽  
Relay Selection ◽  
Coverage Area ◽  
Trade Off ◽  
Selection Protocol ◽  
Decentralized Wireless Networks ◽  
Multiple Relay ◽  
Relay Selection Protocol

We proposed a multiple relay selection protocol for decentralized wireless networks. The proposed relays selection protocol aims to address three issues: (1) selecting relays within the coverage area of the source and destination to ensure that the relays are positioned one hop away from the destination, (2) ensuring that the best node (best relays with less distance and attenuation from the destination) access the channel first, and (3) ensuring that the proposed relays selection is collision-free. Our analysis also considers three important characteristics of decentralized wireless networks that are directly affected by cooperation: delay, connectivity, and throughput. The main goal of this paper is to demonstrate that improving connectivity and increasing number of relays reduce the throughput of cooperative decentralized wireless networks; consequently, a trade-off equation has been derived.

scholarly journals EH-IRSP: Energy Harvesting Based Intelligent Relay Selection Protocol

IEEE Access ◽  
2020 ◽  
pp. 1-1
Author(s):  
Adil Khan ◽  
Mukhtaj Khan ◽  
Sheeraz Ahmed ◽  
Nadeem Iqbal ◽  
Mohd Amiruddin Abd Rahman ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Relay Selection ◽  
Selection Protocol ◽  
Relay Selection Protocol

scholarly journals Performance Analysis of Relay Subset Selection for Amplify-and-Forward Cognitive Relay Networks

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Kiran Sultan ◽  
Ijaz Mansoor Qureshi ◽  
Aqdas Naveed Malik ◽  
Muhammad Zubair
Keyword(s):  
Fading Channels ◽  
Relay Selection ◽  
Subset Selection ◽  
Relay Networks ◽  
Cumulative Distribution ◽  
Amplify And Forward ◽  
Secondary Users ◽  
Coverage Area ◽  
Cognitive Relay Networks ◽  
Multiple Relay

Cooperative communication is regarded as a key technology in wireless networks, including cognitive radio networks (CRNs), which increases the diversity order of the signal to combat the unfavorable effects of the fading channels, by allowing distributed terminals to collaborate through sophisticated signal processing. Underlay CRNs have strict interference constraints towards the secondary users (SUs) active in the frequency band of the primary users (PUs), which limits their transmit power and their coverage area. Relay selection offers a potential solution to the challenges faced by underlay networks, by selecting either single best relay or a subset of potential relay set under different design requirements and assumptions. The best relay selection schemes proposed in the literature for amplify-and-forward (AF) based underlay cognitive relay networks have been very well studied in terms of outage probability (OP) and bit error rate (BER), which is deficient in multiple relay selection schemes. The novelty of this work is to study the outage behavior of multiple relay selection in the underlay CRN and derive the closed-form expressions for the OP and BER through cumulative distribution function (CDF) of the SNR received at the destination. The effectiveness of relay subset selection is shown through simulation results.

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