A hierarchical approach to multicast in a datagram internetwork
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Authors
Voigt, Robert J.
Subjects
Advisors
Shukla, S.B.
Date of Issue
1996-03
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Multicasting in datagram internetworks enables multi-party interactions among users distributed over wide areas by eliminating duplicate packets in one-to-many and many-to-many communication. It requires formation of a tree to distribute multicast data to the communicating group of members. Present multicast techniques need improvement in scope control, resource discovery mechanisms, and tree construction to efficiently support a large number of global groups with dense as well as sparse membership. We deploy a hierarchy of clustered routers with the following features to make these improvements. Each group is assigned a scope level enabling access to resources at that level when members join and permits well-defined boundaries for scope control. The list of border routers and presence of groups at any level is maintained and supplied to members by a level-specific resource discovery mechanism called a registrar. To make tree construction scalable, the border routers determine the shortest inter-cluster paths to source clusters using the available unicast routing information, facilitator aggregation of router state for all senders in a cluster. Unlike the existing approaches, administrative configuration of the hierarchy eliminates the need for locating distribution centers dynamically
Type
Thesis
Description
Series/Report No
Department
Electrical Engineering
Organization
Identifiers
NPS Report Number
Sponsors
Funder
NSF-RIA-9309316
Format
142 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.