A link-state QoS routing protocol based on link stability for Mobile Ad hoc Networks با NS2

A link-state QoS routing protocol based on link stability for Mobile Ad hoc Networks با NS2

A link-state QoS routingp rotocol based on link stability for Mobile Ad hoc Networks

چکیده مقاله:

In this paper, we propose a new mechanism to establish stable and sustainable paths between all pairs of nodes in a Mobile Ad hoc network. In this mechanism, we use a stability function as the main path selection criterion based on the calculation of the mobility degree of a node relative to its neighbor. We applied this mechanism on the OLSR protocol (Optimized Link State Routing Protocol) to elect stable and sustainable MPR (Multipoint relays) nodes and topology. This mechanism significantly minimizes the recalculation of MPR and the routing tables recalculation process. Moreover, it guarantees other QoS (Quality of Service) metrics such as the packet loss and the response time. The simulation results show the effectiveness of our mechanism and encourage further investigations to extend it in order to guarantee other QoS requirements.

Keywords: MANETs, QoS routing, Link stability, OLSR

منبع: sciencedirect.com

http://www.sciencedirect.com/science/article/pii/S1084804513001422

Introduction:
Mobile Ad hoc Networks (MANETs) are a class of infrastructure less networks, which are formed by a number of autonomous wireless and mobile nodes (Corson and Macker, 1999). The inherent characteristics of such networks make the support of multimedia applications very challenging. In fact, the nodes’ mobility and the scarce resources directly impact the deliverance conditions of packets, which also depend on the selected paths’ quality (Gangwar, 2012). The classical routing strategies, such as AODV (Ad hoc On-demand Distance Vector) (Perkins et al., 2003), DSR (Dynamic Source Routing) (Johnson et al., 2007) and OLSR (Clausen and Jacquet, 2003), mainly focus on minimizing the number of hops of the provided paths. This criterion is clearly inefficient to guarantee the services’ quality. Indeed, minimizing the number of hops does not guarantee the quality of the selected links. Otherwise, these protocols select, by default, the farthest nodes to reach the destination with the minimum number of hops. In this way, many QoS-enabled routing protocols were proposed.