Design and investigation of scalable multicast recursive protocols for wired and wireless ad hoc networks

The basic idea of DBT [5] was proposed without any actual implementation and simulation
study. In our first part of research a modification was made to the previous proposed protocol
and implemented in addition to comprehensive simulation study.

The remainder of this chapter is organized as follows; Sections 4.3 to 4.5 will explain SReM
protocol and its details while at Section 4.6 the implementation and results will be discussed
in Section 4.7.

4.2.1 Definitions

In this section, definitions of terminologies and messages used in the proposed protocol are
explained. These messages and terminologies will be discussed in details during the
explanation of the proposed protocol in this chapter, which are summarized in Table 4.1.

Table 4.1 Terminologies used in SReM

Terminology	Description
LMR	Local Multicast-enabled Router, a multicast group member connecting the receivers with multicast enabled feature.
IMR	Intermediate Multicast-enabled Router, a multicast enabled router connecting different multicast group members.
BNR	Branching Node Router, an IMR with the ability to serve as a branching node in the multicast tree.
MFT	Multicast Forwarding Table, a table maintained by each BNR to store information about the previous BNR and next BNRs/LMRs.
DBT	Dynamic Branching node-based Tree, a kind of tree-based method to form a network dynamically.

The proposed protocol uses a set of messages for constructing and maintaining the multicast
tree. Table 4.2 summarizes these messages used in the proposed protocol.

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