Rahul Sharma ¹, T. Jayavignesh ¹

Affiliations
1 School of Electronics Engineering Department, VIT University, Chennai - 600 127, Tamil Nadu, IN

Abstract

Objective: Wireless Sensor Networks (WSN) with IP compatibility consists of nodes that has limited resources such as reduced processing and memory capabilities, less battery life and reduced transmission range. The aim of this research work is to evaluate and implement such a routing scheme, which leads to efficient utilization of nodes and network scarce resources. Methodology: RPL (Routing Protocol for Low Power Lossy Network), a standard routing protocol for IP enabled WSN is considered as an efficient protocol for such network. In this research work, the performance of RPL will be analysed based on different Objective Function (i.e. Expected Transmission Count & Objective Function Zero) in various radio models (Unit Disc Graph Model - Distance Loss, Unit Disc Graph Model - Constant Loss, Multi-Path Ray-Tracer Medium) and scaled networks which makes this implementation unique and the results obtained are compatible to real time scenario. To analyse the performance of RPL with different Objective Function, various performance parameters are calculated e.g. Packet Delivery Ratio, Control Traffic Overhead, Power Consumed, Network ETX. Each of these performance parameters are compared for both the Objective Functions, to analyse which Objective Function of RPL has more efficient performance in various radio models and scaled networks. Findings: From the simulation results analysed, it is proved in this paper that the performance of ETX is better in comparison to OF0 for all the radio models and the scaled networks.

Keywords

6LoWPAN, RPL, Objective Functions, OF0, ETX

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Sneha V. Sangolli ¹, T. Jayavignesh ¹

Affiliations
1 School of Electronics Engineering, VIT University, Chennai - 600127, Tamil Nadu, IN

Abstract

Objectives: This paper focuses on extensive TCP throughput measurement for different IEEE 802.11 standards. TCP being the reliable protocol in the multi-network environment, we measure the TCP throughput to benchmark the performance. Methods: The TCP throughput measurement setup includes Ix-Charriot tool which generates traffic between the source and destination clients. To measure throughputs of IEEE 802.11 a,b,g,n, we used single clients while, for IEEE 802.11ac we did a multi-client throughput measurement. The throughput is measured upstream and downstream. Findings: In the evolution of IEEE 802.11 standard, the major amendments have been with respect to the data rates. In our work we are trying to analyze how the enhancements made in IEEE 802.11 standards have affected the data rates, by measuring the TCP throughput and comparing the values in every case. TCP being the reliable protocol in the multi-network environment is the preferred choice of protocol to benchmark the performance in terms of throughput. Conclusion: From the performance testing results we conclude that with the enhancement in the IEEE 802.11 technology, there has been tremendous improvement in the performance of the latest standards, i.e., 802.11n and 802.11ac. As the IEEE 802.11n standard uses OFDM technology rather than DSSS or FHSS, the throughput is better. This is because in OFDM multiple frequencies are used for data transmission whereas DSSS uses single frequency to transmit the data. Thus the throughputs for IEEE 802.11b/g are lower compared to IEEE 802.11n. Also in IEEE 802.11n MIMO technology is used, which enables more data transfer over larger distances.

Keywords

Measurement, Performance, Throughput, TCP

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