The effect of network size and density to the choice of zone radius in ZRP

<span>Mobile Ad hoc Network (MANET) is a network that consists of several nodes that connect without using a permanent infrastructure. Each node in MANET moves inside and outside of the network freely and randomly. The free and random movements of nodes may cause the topology of the network to change constantly. Therefore, the task of finding routes between nodes is a big challenge. Routing protocols in MANET can be divided into three categories, namely, proactive, reactive and hybrid routing protocols. Hybrid routing protocols such as the Zone Routing Protocol (ZRP) combines the advantages of both proactive and reactive routing protocols by dividing the network area into many overlapping zones. Data transmission to nodes within the zone is done using a proactive routing mechanism, while data transmission to nodes outside the zone is done using a reactive routing mechanism. The zone radius in ZRP determines how much proactive and reactive routing is used, and therefore plays a key role in determining the performance of the network. In this paper, the performance of the ZRP routing protocol is evaluated using the NS2.33 network simulator. The focus of the research is to evaluate the ZRP performance concerning the network size and density to identify an optimum ZRP zone size that will provide good performance. The performance is evaluated by using four performance metrics which are normalized routing load, average end-to-end delay, throughput, and packet delivery fraction. The results show that ZRP produces the best performance when the zone radius size is equal to two hops.</span>

Performance Reasoning of MANET Routing Protocols Varying Node Density

The abbreviation of MANET stands for Mobile Ad hoc NETwork. Nodes in the network can organized and configured by themselves without any kind of permanent infrastructures. All of these extreme features make MANET to be used widely in this contemporary time. In MANET nodes can communicate to each other neither the need of any kind of pre-existing infrastructure like base stations and routers nor any centralized control. Each node be involved in the network can perform both as host along with router. Wireless nodes have the capability of moving freely all over the network at any time. Thus the network topology may reconstruct very quickly over time. This makes the network unreliable and a lot of challenges to the routing of the packets. Routing protocols are used to communicate wireless nodes each other. An efficient protocol will make MANETs reliable. There are three distinct types of MANET routing protocols namely as proactive, reactive routing along with hybrid routing protocols. In these experimentations we have examined all of these categories of routing protocols. We have evaluated Ad-hoc On-demand Distance Vector (AODV) and Dynamic Source Routing (DSR) as reactive, Optimized Link State Routing (OLSR) as proactive, and Geographic Routing Protocol (GRP) as hybrid routing protocols. We have used HTTP traffic over the network designed. OPNET Modeler simulation tool is used to model and simulate the result. In design of the mobility model we have chosen the random waypoint. We have examined delay, network load and throughput of the network varying number of nodes. All of these performance -metrics have considered under light browsing. The comprehensive results show that OLSR has the superior performance for different node density.

Performance Evaluation and Comparison of GRP and OLSR Routing Protocols for Video Streaming Over Mobile Ad Hoc Networks Using OPNET 14.5: مقارنة وتقييم الأداء لبروتوكولات التوجيه (GRP، OLSR) في إرسال الفيديو عبر الشبكات الخاصة المتنقلة باستخدام OPNET 14.5

Due to the increased use of mobile devices with the high demand for applications such as video application, most companies have tended to pay attention to Mobile Ad hoc Networks. This type of network is characterized by multi-hop wireless networks where data packets are sent in a "store and forward" manner from the source to an arbitrary destination via intermediate nodes. The mobile nodes are connected by multi-routes routing as the nodes in this network not only serve as hosts but also as routers where data is routed to and from other nodes in the network and therefore the mobile node not only sends its data packets but also sends data packets of other mobile nodes. The network architecture changes dynamically, mainly because of Mobility of nodes, so we need routing protocols to establish the connection. Routing protocols are categorized into proactive routing protocols, reactive routing protocols and hybrid routing protocols. So in this research, we has been studied Geographical Routing Protocol (GRP ), Optimized Link State Routing Protocol (OLSR) routing protocols which is one of proactive routing protocols and hybrid routing protocols respectively on the basis of Throughput, Delay and Load..etc and evaluated the performance in a large mobile ad hoc network and in a small mobile ad hoc network as well as for different video resolutions, the OPNET 14.5 network simulator was used to obtain research results. It was found that the GRP protocol performs better for a small number of nodes whether the video resolution is low or high while its performance decreases when the number of nodes increases in the network but the OLSR protocol improves when the number of nodes is increased.

Inculcating Trust in Hybrid Routing Approach for Securing MANET

The rudimentary notion of using MANET is that the exchange of information in between the portable nodes count on the swift arrangement of a momentary network. Also, each node in a MANET can travel spontaneously in any direction and can change its links to the other nodes repeatedly. In hybrid protocols, initially, the routing is established with the help of some proactively prospected routes and later on serves the request with the help of reactive flooding. In MANET, the security and the routing are the two most crucial and challenging aspects that open up a vast area for improvement. Security includes a set of considerations that are adequately funded. Designing a competent routing protocol for wireless ad-hoc network along with the fulfilment of security aspects is a challenging task. MANET demands for a new set of networking strategies to be adopted in order to provide competent and secure overhead free end-to-end communication. In MANET, hybrid routing protocols are considered to be the most effective types of protocols as they take the advantage of both proactive and reactive routing protocols. After performing an intense literature survey, it could be concluded that there is a specific requirement of a protocol hybrid in nature that could include the two most specific factors for MANET (i.e., routing and security). The existing hybrid routing protocols suffers from the problems like optimisation control, images detection, and image quantization. To solve the above-mentioned issues of hybrid routing protocols, various optimization algorithms have been proposed that are natural genetics-inspired. The various techniques that can be used to enhance the security are cryptography, bio-metric, trust-based approach, Hash function algorithm, etc.