User Scheduling for Precoded Satellite Systems with Individual Quality of Service Constraints

TL;DR

This paper introduces a heuristic user scheduling algorithm for multibeam high throughput satellite systems that guarantees individual QoS requirements while maximizing overall system throughput, suitable for large-scale networks.

Contribution

A novel heuristic scheduling method that balances QoS guarantees with throughput maximization in multibeam satellite systems, reducing computational complexity.

Findings

The proposed algorithm outperforms benchmarks in sum throughput.

QoS requirements are reliably met for all scheduled users.

Effective for large-scale satellite networks.

Abstract

Multibeam high throughput satellite (MB-HTS) systems will play a key role in delivering broadband services to a large number of users with diverse Quality of Service (QoS) requirements. This paper focuses on MB-HTS where the same spectrum is re-used by all user links and, in particular, we propose a novel user scheduling design capable to provide guarantees in terms of individual QoS requirements while maximizing the system throughput. This is achieved by precoding to mitigate mutual interference. The combinatorial optimization structure requires an extremely high cost to obtain the global optimum even with a reduced number of users. We, therefore, propose a heuristic algorithm yielding a good local solution and tolerable computational complexity, applicable for large-scale networks. Numerical results demonstrate the effectiveness of our proposed algorithm on scheduling many users with better sum throughput than the other benchmarks. Besides, the QoS requirements for all scheduled users are guaranteed.