An enhanced QoS routing algorithm for provision of end-to-end delay guarantee in low earth orbit satellite networks

Although several routing algorithms for Low Earth Orbit (LEO) satellite networks have been proposed in literature, the issue of providing guaranteed end-to-end delay bound Quality of Service (QoS) for LEO satellite networks with good throughput has not been solved. The motivation to design such an algorithm is based on the fact that LEO satellite networks are likely to play an important role in the future Internet. In this paper, Weighted Fair Queuing (WFQ) is introduced into LEO satellite system with the aim of providing end-to-end delay guarantee. High Performance Satellite Routing (HPSR), which is able to provide guaranteed end-to-end delay bound for LEO satellite networks with high throughput, is put forward. Unlike previously reported algorithm, HPSR applies a route computation algorithm which takes statistical multiplexing among connections into consideration, and which is able to obtain good system throughput. Through simulations on an Iidium-like constellation, the proposed approach is shown to achieve guaranteed end-to-end delay bound with higher throughput as compared to a previously reported routing scheme.