served by this XF in the source Xcast header. By using this method, in high mobility
scenarios E2M will work like DDM and an extra overhead and delay will happen.
To the best of our knowledge, EM2NET is the most recently proposed explicit multicast
protocol for MANETs. The basic idea of this protocol as claimed by authors is to
dynamically forward data between intercepting nodes in the network. This protocol has a set
of limitations discussed before.
In our research work, we proposed the Scalable Ad-hoc Recursive Multicast protocol
(SARM) to overcome these limitations. Our proposed protocol has the same objectives as
EM2NET with major developments. SARM differs from EM2NET in tree construction
which done recursively and locally. Other improvement is the low latency of join/leave
process.
3.5 Summary
This chapter discusses one type of multicast routing protocols proposed for wired and
wireless ad hoc networks. The main feature of protocols related to that type is to reduce the
routing information stored in the nodes participating in multicast tree. This feature is to
improve the scalability in multicast routing protocols by swapping part of the state
information to an explicit messages used during routing process.
In the proposed work in this thesis the scalability feature is considered for wired and ad-hoc
multicast protocol. The proposed work started from where the others have reached and
developed new scalable multicast routing protocols.
In the next chapter, a new scalable multicast routing protocol is proposed (SReM). This
protocol proposed a new idea for improving the scalability feature of routing protocols. This
chapter will give a full description and evaluation of the proposed protocol.
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