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Differential Destination Multicast (DDM) Specification

Document Type Expired Internet-Draft (manet WG)
Authors Lusheng Ji , Dr. Scott M. Corson
Last updated 2000-07-21
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
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Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at:


This draft describes a multicast routing protocol for mobile ad hoc networks (MANETs). The protocol---termed Differential Destination Multicast (DDM)---differs from common approaches proposed for ad hoc multicast routing in two ways. Firstly, instead of distributing membership control throughout the network, DDM concentrates this authority at the data sources (i.e. senders) thereby giving senders knowledge of group membership. Secondly, differentially-encoded, variable-length destination headers are inserted in data packets which are used in combination with unicast routing tables to forward multicast packets towards multicast receivers. Instead of requiring that multicast forwarding state be stored in participating nodes, this approach also provides the option of stateless multicasting. Each node independently has the choice of maintaining cached forwarding state, or requesting its upstream neighbor to insert this state into self-routed data packets, or some combination thereof. The protocol is best suited for use with small multicast groups operating in dynamic networks of any size.


Lusheng Ji
Dr. Scott M. Corson

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)