Analyzing the performance of Aloha in string multi-hop underwater acoustic sensor networks

Abstract

In this article, we intend to investigate the performance of channel access protocols in multi-hop underwater acoustic sensor networks, which are characterized by long propagation delays and limited channel bandwidth. An analytical model specifically designed for contention-based protocols in multi-hop underwater acoustic networks is identified and validated. The model is based on an underwater network model, called string topology network model, which provides a method for computing the expected network throughput and the probability of packets' delivery to the gateway from an arbitrary sensor. This study demonstrates an improvement of an existing model, in which a node is implicitly assumed to be able to transmit two packets at the same time, which is not realistic due to the half-duplex character of underwater acoustic channels. Based on our findings, we propose a modified analytical model and evaluate it using NS-3 simulator. Results show that our analytical model is more precise than the existing one.

Cross Deployment Networking and Systematic Performance Analysis of Underwater Wireless Sensor Networks

“…In conclusion, our approach proves that CBCL and CDNM are better than NBCL, and at the same time, compared to some previous works ([ 19 ] (2011), [ 20 ] (2013), [ 21 ] (2014), [ 22 ] (2015), [ 26 ] (2016) and [ 27 ] (2017)), the SQPCM can be employed to evaluate the systematic performance of a network on coverage, connectivity durability and rapid-reactivity, as shown in Table 4 .…”

“…In [ 16 , 17 , 18 ], the authors built a model named Routing and Multicast Tree based Geocasting (RMTG) for geocast region holes in underwater sensor networks and provided detailed analysis and performance evaluation for the model. Many other researchers have analyzed performance features such as connectivity, reliability and energy efficiency when studying specifically the routing protocol, network architecture and topology control for UWSNs [ 19 , 20 , 21 , 22 ].…”

WDFAD-DBR: Weighting depth and forwarding area division DBR routing protocol for UASNs

“…1114 In actual applications, not only void-hole but also channel 1115 contending affects the delivery ratio of networks [41]. 1116 Definition 4 (Upstream node or downstream node).…”

“…The traditional routing mechanism for terrestrial sen-38 sor networks cannot work well any longer due to unstable 39 network topology structure caused by irregular mobility of 40 nodes. 41 In addition, underwater acoustic sensors are powered by 42 batteries. Energy-conversation must be considered because 43 it is difficult to replace or recharge batteries after node de- coordinates among neighbor nodes.…”

Cross-Layer Energy Minimization for Underwater ALOHA Networks

“…Performance analysis of ALOHA for multihop networks is studied in [14]. A modified analytical model of ALOHA in a string multihop network is presented in [15].…”