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Reliable IP Multicast Communication over ATM Networks Using Forward Error Correction Policy
Hiroshi ESAKI Takeo FUKUDA
IEICE TRANSACTIONS on Communications
Publication Date: 1995/12/25
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Communication Networks and Service
ATM, multicast, FEC, reliable data transmission,
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This paper discusses and evaluates an effect of cell level FEC (Forward Error Correction) capability on error-free (i.e. reliable) IP multicast service over ATM networks. In the error-free IP multicast service, every receiver is delivered IP packet from the sender synchronously. Without applying the FEC policy, the expected IP packet error/loss probability becomes large, when the number of multicast receivers is large. For example, when the cell error/loss probability of each ATM data-link segment is 10-6 and the number of receivers is 103, the IP packet error/loss probability observed at the sender is about 0.5, which means that about 50% of IP packet sent from the sender will be subject to retransmission. One possible solution would be using the intermediate multicast-TCP entities, that terminate TCP protocol, among the sender and the receivers. However, this approach requires the additional entities within the network and can not provide the ordered message delivery for a multipoint-to-multipoint communication. On the contrary, with applying the FEC policy, the expected IP packet error/loss probability is dramatically reduced. Therefore, an error-free IP multicast service can be provided with a simple architecture, even when the number of multicast receiver is large, e.g. 105. For example, when the cell error/loss probability of each ATM data-link segment is 10-6, the packet error/loss probability observed at the sender is less than 10-2 even for 106 receivers. Finally, even when the cell error/loss probability of ATM data-link segment is large, e.g. 10-3, the IP multicast service without the FEC policy can not apply even for 10 receivers. However, the IP multicast with the FEC policy can apply upto few hundred of receivers.