In highly dynamic LEO satellite communication systems, the grade of service (QoS) is severely degraded by the frequent handover. Existing handover schemes focusing on the overall system QoS cannot ensure single user’s QoS, which is not desirable for important users, such as emergency communication users. Exploiting the fact that the movement of LEO satellites are periodic and predictable, this paper proposes a channel reservation based load aware (CRLA) handover algorithm. On one hand, channel can be reserved for important users to ensure their QoS. On the other hand, the load status of each satellite is considered in CRLA handover of the whole system. Simulation result shows that CRLA can reduce handover failure rates while ensure the load balance of the system. Comparing to existing schemes, the CRLA handover algorithm can reduce the handover failure rate by 20% and improve the QoS by 16%.
Channel Reservation based Load Aware Handover for LEO Satellite Communications
2022-06-01
660999 byte
Conference paper
Electronic Resource
English
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