This paper deals with the design and analysis of the distributed weighted clustering algorithm SD_DWCA proposed for homogeneous mobile ad hoc networks. It is a connectivity, mobility and energy based clustering algorithm which is suitable for scalable ad hoc networks. The algorithm uses a new graph parameter called strong degree defined based on the quality of neighbours of a node. The paramete...

In this paper, we introduce a new location-based routing protocol INGEO (INdoor GEOgraphic Routing Protocol) for ad hoc networks based on an indoor location system. We aim at extracting an optimum topology from the dynamic and irregular topology of a mobile ad hoc network to reach more quickly the destination applying an indoor geographic routing. Our scheme operates in a loopfree manner and at...

Minimizing the number of dropped User Datagram Protocol (UDP) messages in a network is regarded as a challenge by researchers. This issue represents serious problems for many protocols particularly those that depend on sending messages as part of their strategy, such us service discovery protocols. This paper proposes and evaluates an algorithm to predict the minimum period of time required bet...

We present a new end-to-end transport protocol called Multipath Transmission Control Protocol (M/TCP) and its robust acknowledgement (ACK) schemes. M/TCP is designed as an alternative TCP option to improve reliability and performance of today’s Internet. M/TCP allows a sender to simultaneously transmit data via multiple controlled paths to the same destination. The protocol requires no modifica...

This study aims at the evaluation of queuing algorithms using NS2 simulator. The recent LDDoS attacks cause more severe damage to the TCP based applications than the traditional DDoS attacks. The congestion participation rate (CPR) approach is used for detection and prevention of LDDoS attacks. Earlier approaches can only detect the LDDoS attacks. The CPR approach using queuing management algor...

On the basis of Evalvid tool integrated in NS2 (Network Simulator version 2), the paper gets new set of tools, myEvalvid, to establish the simulation and evaluation platform for multimedia transmission. Then the paper investigates the effects of various influence factors when multimedia information is transmitted in the network and the relationships among these factors. Based on the analysis, t...

Congestion is an important issue which researchers focus on in the Transmission Control Protocol (TCP) network environment. To keep the stability of the whole network, congestion control algorithms have been extensively studied. Queue management method employed by the routers is one of the important issues in the congestion control study. Active queue management (AQM) has been proposed as a rou...

The assessment of routing protocols for ad hoc networks is a difficult task, due to the networks’ highly dynamic behavior and the absence of benchmarks. Recently, a graph theoretic model – the evolving graphs – was proposed to help capture the network topology changes during time, with predictable dynamics at least. The algorithms and insights obtained through this model are theoretically very ...

Terminal mobility with Quality of Service (QoS) can be provided through efficient and seamless handoffs and handoff management procedures in 4G wireless access networks. The primary objective of this work is to analyze the handoff management procedures within a WiMAX access networks and to evaluate its impact on different QoS metrics such as Packet Loss, Throughput and End-to-End Delay. The per...

The standard optimized link state routing (OLSR) introduces an interesting concept, the multipoint relays (MPRs), to mitigate message overhead during the flooding process. This paper propose a new algorithm for MPRs selection to enhance the performance of OLSR using particle swarm optimization sigmoid increasing inertia weight (PSOSIIW). The sigmoid increasing inertia weight has significance im...