NDLI: Protocol design for scalable and adaptive multicast for group communications

Content Provider	IEEE Xplore Digital Library
Author	De-Nian Yang Wanjiun Liao
Copyright Year	2008
Description	Author affiliation: Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei (De-Nian Yang; Wanjiun Liao)
Abstract	Currently, IP multicast and Explicit Multi-Unicast (Xcast) are two approaches for multicast communications. IP multicast is designed for large groups but is not scalable in terms of the group number because every router in a multicast tree needs to store the forwarding state for each group. In contrast, Xcast is designed for small groups and is not scalable in terms of the group size because each packetpsilas header can include only the addresses of a few receivers. Therefore, the two approaches are designed for different scenarios and address different problems. However, the selection of IP multicast or Xcast is left to end users who will choose the corresponding API in the applications. In other words, the scalability of the network relies on the end users, and is not guaranteed by the protocol itself. In this paper, we address the above issues and propose a multicasting protocol that is scalable and adaptive in terms of both group number and group size. We avoid the disadvantages of IP multicast and Xcast by choosing only a few routers to store the forwarding states, and multicast packets are delivered via Xcast among these routers. The main advantage of our protocol is that the assignment of forwarding states is optimal and performed in a fully distributed manner. We show that IP multicast and Xcast are two extreme and special cases of our approach. We prove that the overhead of our protocol is limited. In addition, the assignment of forwarding states in our protocol is adaptive to the dynamic group membership and the change in network topology. Moreover, our protocol is simple and can be extended from existing multicast routing protocols.
Starting Page	33
Ending Page	42
File Size	303417
Page Count	10
File Format	PDF
ISBN	9781424425068
ISSN	10921648
DOI	10.1109/ICNP.2008.4697022
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multicast protocols Routing protocols Scalability Unicast Multicast communication Network topology Relays Delay scalability Multicast Xcast
Content Type	Text
Resource Type	Article

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