Reliable content delivery over unidirectional link using IP datagrams

Abstract

Sending and receiving data over Unidirectional Link provide an alternative choice of delivery. With this architecture, we can send data to any places where there exists a satellite or radio signal. Since unidirectional link do not have any feedback from receiver, there is no mechanism to ensure reliability of data delivery.

This thesis applies a more reliable delivery approach in unidirectional link by using duplication technique. Receiver is guaranteed to reassembly all data packets to get the original data set even if data packets had boisterous arrived to receivers. Experiments were setup in different environment to measure receiving capability and efficiency in restoring original data set.

Experiment results in this study have exposed that; data delivery over unidirectional link could be completely received within an appropriate time if packet loss rate is low. It was found that bandwidth and speed of CPU is significant impact to the performance of the application. In case that bandwidth was not enough, packet lost will immediately occurred because some data packets have to be discarded. Speed of CPU was another reason of data lost; if receiver spent too much time for reassembling data packet, then receiver would miss the following data packet.