Multi-Gateway Cooperation in Multibeam Satellite Systems

TL;DR

This paper explores multi-gateway cooperation strategies in multibeam satellite systems, analyzing various interference management techniques and their impact on system throughput.

Contribution

It investigates different intercluster interference mitigation methods, including CSI and data sharing, highlighting the performance benefits of combined sharing approaches.

Findings

CSI sharing alone offers limited gains.

Data sharing combined with CSI sharing improves throughput significantly.

Joint processing within clusters performs well without intercluster sharing.

Abstract

Multibeam systems with hundreds of beams have been recently deployed in order to provide higher capacities by employing fractional frequency reuse. Furthermore, employing full frequency reuse and precoding over multiple beams has shown great throughput potential in literature. However, feeding all this data from a single gateway is not feasible based on the current frequency allocations. In this context, we investigate a range of scenarios involving beam clusters where each cluster is managed by a single gateway. More specifically, the following cases are considered for handling intercluster interference: a) conventional frequency colouring, b) joint processing within cluster, c) partial CSI sharing among clusters, d) partial CSI and data sharing among clusters. CSI sharing does not provide considerable performance gains with respect to b) but combined with data sharing offers roughly a 40% improvement over a) and a 15% over b).