A New Distributed Application and Network Layer Protocol for VoIP in Mobile Ad Hoc Networks

Abstract

In this work a new protocol for Voice over IP (VoIP) transmissions in wireless ad-hoc networks is proposed. Distributed architecture is necessary when dealing with dynamic environments, such as ports or battlefields, where creating infrastructures becomes expensive or impossible. Mobile Ad-hoc NETworks (MANETs) are based on a peer-to-peer approach and each node participates in the organization of the whole network. VoIP over MANETs is a challenging issue due to the intrinsic distributed nature of the existing peer-to-peer paradigm. This paper proposes a new protocol, capable of ensuring a Quality of Service (QoS) level for VoIP calls over a MANET and to manage a higher number of calls in the system. Novel metric and utility functions are proposed to perform the best path selection from source to destination nodes, respecting the QoS parameters for VoIP quality. In particular, an objective metric such as R-factor is considered and a flexibility index is defined, in order to maximize the number of acceptable VoIP calls. Performance evaluation shows that the proposed approach led to better network management in terms of admitted calls and respected QoS constraints.

Trust management using probabilistic energy-aware monitoring for intrusion detection in mobile ad-hoc networks

“…The security is another of the main issues that needs to be taken into account in this field, due to the intrinsic insecure environment in which they are used. Many proposals need reliable routing operations to offer services like VoIP, live video streaming, etc., as proposed by the authors in [5]. The energy is not an issue for Vehicular Ad-hoc Networks (VANETs), while the security side of these network is not widely investigated, so approaches that improve the security are applicable to these networks too.…”

Probabilistic monitoring in intrusion detection module for energy efficiency in mobile ad hoc networks

“…Many proposals need reliable routing operations to offer services like VoIP, live video streaming, etc., as proposed in Ref. 13. Mobile nodes in MANETs are subject to constraints on the energy available for routing and security operations, therefore many proposals concern approaches with the aim of analyzing and reducing the energy consumption.…”

On using multiple routing metrics with destination sequenced distance vector protocol for MultiHop wireless ad hoc networks

“…The communication is performed on a hop-by-hop basis with limited range wireless links with no existing pre-established infrastructure. However, the main characteristic of these networks is a decentralized organization and the unpredictable mobility of nodes, which can often lead to unstable routing paths [2][3][4][5] . Because of this, routing in such a dynamic environment is one of the most discussed and debated questions.…”