Load-balance and coding awareness protocol multicast in space information network

Applications of multicast technology in space information network are increasing year by year. Due to the inherent characteristics of space information network, the existing multicast protocols are difficult to meet the high-quality service requirements and the need for reliability. A coding-aware and load balancing reliable multicast protocol in space information network is proposed. A coding-aware and load balancing routing metric is designed. This paper defines a load balancing factor to measure load status of the node and the Expected Transmission Time with Coding to measure the coding gain. A new route metric ECTTL (Expected Transmission Time with Coding and Load balancing) which combines the two factors is designed to select the high throughput path routes. It not only has the potential coding opportunity but is also able to prevent routing node overflows due to overload. In route establishment process, according to different business needs, it is preferable to use ECTTL metric to build multipath multicast tree and network coding method to encode the data for transmission. The coding-aware load balancing and reliable multicast protocol LCRM is simulated and analyzed in NS-2 simulation platform, The results showed that the design of coding-aware load balancing and reliable multicast protocol LCRM had good performance in reducing the end-to-end delay, routing overhead and improving the network throughput.