MOBILE AD HOC NETWORKS (MANET)
As the foundation of routing, topology control should minimize
the interference among nodes, and increase the network capacity. With the
development of mobile ad hoc networks (MANETs), there is a growing requirement
of quality of service (QoS) in terms of delay. In order to meet the delay
requirement, it is important to consider topology control in delay constrained
environment, which is contradictory to the objective of minimizing interference.
In this paper, we focus on the delay-constrained topology control problem, and
take into account delay and interference jointly. We propose a cross-layer
distributed algorithm called interference-based topology control algorithm for
delay-constrained (ITCD) MANETs with considering both the interference
constraint and the delay constraint, which is different from the previous work.
The transmission delay, contention delay and the queuing delay are taken into account
in the proposed algorithm.
WITH the increasing attention and development in mobile ad hoc
networks (MANETs), there is a growing demand for applications that require
quality of service(QoS) provision, such as voice over IP (VoIP), multimedia, real-time
collaborative work. Different applications often have different QoS
requirements in terms of bandwidth, packet loss rate, delay, packet jitter, hop
count, path reliability and power consumption. Real-time application is one of
the particularly useful application directions of MANETs, especially VoIPapplications, where there is a strict requirement of delay. Topology control is to dynamically change the nodes transmission
range in order to maintain connectivity of the communication graph, while
reducing energy consumption and/or interference that are strictly related to
the nodes transmitting range. A good topology not only can provide a better
service for routing layer, but also can save energy, increase network capacity
and satisfy the QoS requirements.
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