A Power-Optimized Handover strategy in Hybrid Satellite-Terrestrial Networks
Satellite communications provide large-scale coverage, so they can be integrated with terrestrial networks to implement a global wireless system, namely HSTNs. However, the network resources of satellite systems, such as the bandwidth and power, are extremely limited. This paper proposes a handoff strategy to minimize the power consumption of satellite systems required in serving a traffic flow in a hybrid Satellite-Terrestrial system, while guaranteeing the user QoS. It first established a speed-sensing based handoff model integrated with both horizontal and vertical handoff. To further minimize the power consumption, an improved Markov decision algorithm for vertical handover, namely SPO-MDP, is brought up. Simulation results show that the proposed model and scheme can lead to a lower power consumption and fewer handoff times in satellite systems compared to several existing schemes and meanwhile keeps the call drop rate at a respectively low level.
Satellites Power-optimized Markov decision process (SPO-MDP) Handover Strategy Hybrid Satellite-Terrestrial Networks (HSTNs)
Huiping Xu Jinchun Gao Hefei Hu Dongming Yuan Jing Ran
Dept. of Electronic Engineering, Beijing Univ. of Post and Telecommunications, Beijing, 100876, China
国际会议
重庆
英文
318-322
2015-12-18（万方平台首次上网日期，不代表论文的发表时间）