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Multicast Capacity in MANET with
Infrastructure Support
ABSTRACT:
We study the multicast capacity under a network model featuring both
node’s mobility and infrastructure support. Combinations between
mobility and infrastructure, as well as multicast transmission and
infrastructure, have already showed effective ways to increase multicast
capacity. In this work, we jointly consider the impact of the above three
factors on network capacity. We assume that m static base stations and n
mobile users are placed in an ad hoc network. A general mobility model is
adopted, such that each user moves within a bounded distance from its
home-point with an arbitrary pattern. In addition, each mobile node serves
as a source of multicast transmission, which results in a total number of n
multicast transmissions. We focus on the situations in which base stations
actually benefit the capacity improvement, and find that multicast capacity
in a mobile hybrid network falls into several regimes. For each regime,
reachable upper and lower bounds are derived. Our work contains
theoretical analysis of multicast capacity in hybrid networks and provides
guidelines for the design of real hybrid systems combing cellular and ad
hoc networks.
EXISTING SYSTEM:
We study the multicast capacity under a network model featuring both
node’s mobility and infrastructure support. Combinations between

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mobility and infrastructure, as well as multicast transmission and
infrastructure, have already showed effective ways to increase multicast
capacity. In this work, we jointly consider the impact of the above three
factors on network capacity. We assume that m static base stations and n
mobile users are placed in an ad hoc network. A general mobility model is
adopted, such that each user moves within a bounded distance from its
home-point with an arbitrary pattern. In addition, each mobile node serves
as a source of multicast transmission, which results in a total number of n
multicast transmissions. The gain of multicast transmission results from a
merge of relay paths within a minimum spanning tree. It extends the
multicast transmission to a Gaussian channel model and show similar
capacity improvement under the corresponding protocol. Many existing
studies focus on the combinations of the above characteristics. Some aim to
further increase the network performance, while others try to present a
more realistic scenario.
PROPOSED SYSTEM:
Hybrid routing schemes are proposed to achieve reachable upper and
lower bounds in each of the regimes. It is worth pointing out that our work
generalizes results in previous works on hybrid networks, impact of
mobility and multicast transmissions, as well as any combinations of the
above. Our results are instructive in the design of real hybrid system
combining cellular and ad hoc networks.
CONCLUSION:

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This paper analyse the multicast capacity in mobile ad hoc networks with
infrastructure support. Hybrid routing schemes are proposed to achieve
reachable upper and lower bounds in each of the regimes. It is worth
pointing out that our work generalizes results in previous works on hybrid
networks, impact of mobility and multicast transmissions, as well as any
combinations of the above. Our results are instructive in the design of real
hybrid system combining cellular and ad hoc networks.