A Multicast Protocol to Improve Bandwidth Usage

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Date
1995-09
Authors
El-Feghih, Ayoub Hussein
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Abstract
Point-to-Point and Broadcast channels are the two types of designs adapted for 'the communication subnets. Point-to-Point type is essentially a communication between ~,. two terminals. Broadcast systems have a single communication channel that is shared by all machines connected to the network. Communication subnets are supported by two services namely, connection-oriented and connectionless. Each service can be characterized by the type of service. Connection-oriented service has three distinct phases: establishment, transfer, and release. File Transfer Protocol (FTP) is one of the applications that uses connectionoriented service. Point-to-Multipoint file transfer are being done by connection~oriented service in the LAN environment. The concept of connection-oriented service causes heavy network traffic and reduces the bandwidth. To reduce the problem of heavy traffic in the network and thus improve the bandwidth, we adopted the connectionless service to point-to-multipoint file transfer. However, the connectionless method causes a different problem of lack of guarantee of correct transfer of file.' The connectionless (unreliable) service does not provide [or acknowledgment, which means that there is no guarantee that all data will be received correctly, there is a probability of duplication, loss and incorrect sequence of data. The owner of the file wants to be sure that all bits reach correctly and in the same order in which they were sent. In this work we have addressed this problem also. Thus, the objective of this work is to develop a point-to-multipoint file transfer protocol which increases the bandwidth and provides the guarantee ~f correct file transfer.
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Broadcast channels are , adapted for 'the communication subnets
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