Abstract: Onboard power and bandwidth of low earth orbit (LEO) satellite networks are limited， thus designing an efficient resource allocation method is of great significance. A power and bandwidth joint allocation method for LEO satellites was proposed， and improved the resource allocation fairness among satellites and network service carrying ability were improved. The ground stations number and user data links life time were used to describe proportional constraints of intersatellite links capacity， and satellite resources allocation problem was formulated as a nonlinear mixed integer programming problem. Swallow swarm optimization (SSO) was improved by introducing dynamic feasible region and defining binary variable update operation， then the optimization model was solved by using this method. Simulations demonstrate satellite instantaneous throughput capacity and network instantaneous capacity change periodically with random fluctuations. The method achieves the resource allocation fairness among satellites at cost of network capacity.

Key words: low earth orbit (LEO) satellites, power, bandwidth, joint allocation, swallow swarm optimization