High-Reliability, Low-Latency, and Load-Balancing Multipath Routing for LEO Satellite Networks

Being a critical part of the sixth generation mobile networks (6G) infrastructure, satellite networks have rapidly developed in recent years. With the increasing number of satellites and high mobility, the challenges of Ultra-Reliable and Low-Latency (URLL) services are increasingly prominent. The regular topology and orbital movement of low earth orbit (LEO) satellites present a new opportunity for the design of network routing for URLL services. In this paper, we propose a High-Reliability, Low-Latency, and Load-Balancing Multipath Routing (HLLMR) to support URLL services for LEO satellite networks. To ensure the reliability of satellite network transmission, a packet is transmitted through multiple paths. The path and link selection strategy avoids hotspots through load balancing to ensure end-to-end reliability and delay and minimize the link cost. Using the Starlink constellation, we illustrate the advantages of HLLMR routing in terms of delay and reliability.