Connectivity Gateway Discovery in MANETs

Abstract

Abstract. The integration of mobile ad hoc networks into IP-based access networks demands the presence of a gateway which is responsible for propagating some configuration parameters by means of Modified Router Advertisement (MRA) messages. This function may be accomplished on demand by the mobile nodes (reactively), periodically activated by the gateway (proactively) or by combining the two approaches. In the proactive mechanisms, the interval of emission of the MRA messages (T ) may significantly affect the network performance. The optimum value for T depends on the network conditions such as the position of the sources, the mobility of nodes, etc. Therefore, an autonomous and adaptive technique to dynamically configure T is strongly recommended. In this sense, a new adaptive gateway discovery mechanism is proposed in this paper. The adaptation is achieved by a control system which has been conveniently configured by means of an analytical model. Simulation results show that the proposed adaptive mechanism improves the conventional proactive schemes.

Using Fuzzy Logic in Hybrid Multihop Wireless Networks

“…Table 2 summarizes the parameters of the simulations. [15,20,25,30,35,40] Number of Gateways [2,3,4,5,6] Firstly, we vary the number of nodes in the MANET from 40 to 55. For this case, we assume that there are 40 traffic sources and 4 Gateways.…”

“…To make the Gateway able to compute this parameter, the MRS messages are only replied by the Internet Gateway. This metric was used in [16].…”

“…However, tuning the values of the TTL and the T parameters is not a trivial task in conventional MANET applications. Specifically, the optimum value for the T parameter depends on several factors such as the number of traffic sources, their positions, their route duration or the density of nodes [5]. Furthermore, as network conditions are expected to vary unpredictably in actual MANET scenarios, an autonomous and dynamic algorithm to adjust the T and TTL parameters is strongly recommended.…”

A Proposed "OSI Based" Network Troubles Identification Model

“…IP, IPX/SPX, known as routed protocol, is covered on Network Layer. Furthermore, RIP (Routing Information Protocol), IGRP (Interior Gateway Routing Protocol), EIGRP (Enhanced Interior Gateway Routing Protocol), OSPF (Open Shortest Path First), AGP (Autonomous Gateway Protocol) and BGP (Border Gateway Protocol), known as routing protocol, are identified on Network Layer [9,10,11]. Echo message to realize package exchange (inbound-outbound) or to test next terminal reach is covered on this layer.…”

Efficient Manet- Internet Integration for Mobile Devices

“…Trujillo [27] proposed process optimized adaptive gateway discovery approach to provide internet connectivity in multi-hop ad hoc networks. Modified router advertisement (MRA) message scheme is used to discover the gateway.…”