TCP Performance in Mobile Ad hoc Networks

In this paper, we present a survey of TCP (Transmission Control Protocol) protocol for better performance in the MANET (Mobile Ad Hoc Network). After a short presentation of the main features of TCP, we give the most important problems from which TCP suffer in MANET. We present after that some approaches proposed in the literature in order to improve its performance. Our paper contains also a performance evaluation of TCP NewReno and TCP Vegas transport protocols under AODV and DSR routing protocols. The simulations are conducted under varying conditions of number of TCP connections, number of nodes and mobility.Hamrioui, S.; Lloret, J.; Lorenz, P.; Lalam, M. (2013). TCP Performance in Mobile Ad hoc Networks. Network Protocols and Algorithms. 5(4):117-142. doi:10.5296/npa.v5i4.4773S1171425

A Cross Layer Solution for Better Interactions Between Routing and Transport Protocols in MANET

This paper presents firstly a study of interactions between two routing protocols (AODV, DSR) and two transport protocol versions (TCP New Reno, Vegas). After this study, we conduct some simulations to analyze the behavior of these protocols with different node mobility and network load values. The performance results of each protocol are examined to identify our own scenarios in order to evaluate our proposed solution for better interactions between these protocols. This solution is called CL-TCP (Cross Layer TCP). It is an adaptation of the TCP congestion control mechanism with some parameters provided by the routing layer (mobility nodes and the size of routing length). After the evaluation of CL-TCP, the results showed that it significantly improves the interactions between TCP Vegas and AODV protocols.Hamrioui, S.; Lorenz, P.; Lloret, J.; Lalam, M. (2013). A Cross Layer Solution for Better Interactions Between Routing and Transport Protocols in MANET. Journal of Computing and Information Technology. 21(3):137-147. doi:10.2498/cit.1002136S13714721

Self-organizing technique for improving coverage in connected mobile objects networks

Despite the multiple benefits offered today by connected mobile objects networks (CMONs), some constraints continue to limit their development and to degrade their applications and services’ performance. Given their limited energy, some or many objects may stop functioning which leads to the deterioration of network functionalities such as monitoring, detection and transfer of data. It is in this context that our work is situated, namely the improvement of applications performance and the quality of service (QoS) within CMONs, by exploiting some communication environment parameters and geometry techniques.We propose a new technique called self-organization area coverage (SOAC) for CMONs which aims to ensure maximum coverage in the network while optimizing the exploited resources. SOAC has been evaluated and compared not only to the network without improvement but to two other solutions proposed in the literature. The obtained results show a clear improvement in terms of network coverage and several QoS parameters

Incidences of the Improvement of the Interactions Between MAC and Routing Protocols on MANET Performance

In this paper, we present an improvement for the interactions between MAC and routing protocols to better energy consumption in MANET (Mobile Ad hoc Networks) and show its incidences on the performance of the network. We propose a new approach called IMREE (Improvement of the Interactions between MAC and Routing protocol for Energy Efficient) which exploits tow communication environment parameters. The first one is the number of nodes; our approach reduces the additional energy used to transmit the lost data by making the size of the backoff interval of MAC protocol adaptable to the nodes number in the network. The second parameter is the mobility of nodes; IMR-EE uses also the mobility of nodes to calculate a fairness threshold in order to guarantee the same level of the residual energy for each node in the network. We evaluate our IMR-EE solution with NS (Networks Simulator) and study its incidences on data lost and energy consumption in the network under varied network conditions such as load and mobility. The results showed that IMR-EE outperform MAC standard and allows significant energy saving and an increase in average lifetime of a mobiles nodes in the network

Bio Inspired Routing Algorithm and Efficient Communications within IoT

International audienc

Load Balancing Algorithm for Efficient and Reliable IoT Communications within E-Health Environment

International audienc

Distinction between Data Losses for Better Communications in IoT

International audienceOur objective in this paper is to improve the communications performance for IoT applications by proposing a new solution called IC-IoT (Improving Communication for IoT). The principle used is the exploitation of three existing communication protocol by incorporating some mechanisms to consider the different parameters which can cause the data loses. A probabilistic approach is used to know the impact of every single parameter on the communication performance. The calculated probabilities are used by routing, transport and MAC protocols to adapt their functioning. IC-IoT leads to keep a better performance of quality of services (QoS) parameters and then provide favorable conditions for IoT applications. After the evaluation of its performance, the proposed solution improves the QoS parameters for the IoT applications. We are interesting mainly to the rate of packets delivery, the network lifetime and the evolution of the consumed energy

Efficient medium access protocol for Internet of things applications: Efficient medium access protocol for Internet of things applications

The recent progresses made in microelectronics and sensor networks led to the emergence of a new family of networks called Internet of things (IoT). Several factors may degrade seriously IoT applications performance and prevent the connected objects to accomplish out their services. One factor is the inability of medium access control (MAC) protocol, namely, DCF 802.11 function, to distinguish between different sources of frame losses. To address this problem, we propose in this article an improvement called MAC protocol with distinction between data losses (MAC‐DL), which consists mainly to consider the different sources of frame losses in the functioning of the backoff algorithm. After the evaluation of MAC‐DL performance, the results showed a better performance compared with MAC protocol with the original DCF 802.11 function and to 2 other protocols proposed in the literature. Our solution improved significantly the quality of service and the energy efficient for typical IoT scenarios