The Research of Channel Reservation Strategy in LEO Satellite Network

Users will handover between spot-beam frequently when Low Earth Orbit (LEO) satellite moves round the earth, so proper channel reservation strategy should be applied to reduce call dropping probability. A channel status-based reservation strategy (CSRS) is proposed for multimedia LEO satellite network in this paper. Considering that the channel locking time is very long in the Guaranteed Handover (GH) algorithm, the proposed method sets reservation time adaptively for different users according to the status of cell so as to utilize the resource more effectively. Simulation results show that the proposed strategy can reserve channel adaptively for different users and reduce handoff call dropping probability and new call blocking probability, while also improve resource utilization.