Dynamic resource allocation(DRA) is a key technology to improve system performances in GEO multi-beam satellite systems. And, since the cache resource on the satellite is very valuable and limited, DRA problem under r...Dynamic resource allocation(DRA) is a key technology to improve system performances in GEO multi-beam satellite systems. And, since the cache resource on the satellite is very valuable and limited, DRA problem under restricted cache resources is also an important issue to be studied. This paper mainly investigates the DRA problem of carrier resources under certain cache constraints. What's more, with the aim to satisfy all users' traffic demands as more as possible, and to maximize the utilization of the bandwidth, we formulate a multi-objective optimization problem(MOP) where the satisfaction index and the spectrum efficiency are jointly optimized. A modified strategy SA-NSGAII which combines simulated annealing(SA) and non-dominated sorted genetic algorithm-II(NSGAII) is proposed to approximate the Pareto solution to this MOP problem. Simulation results show the effectiveness of the proposed algorithm in terms of satisfaction index, spectrum efficiency, occupied cache, and etc.展开更多
本文介绍一种新型的数能一体化无线通信网络(data and energy integrated communication networks,DEINs),它将传统的无线网络中相互独立的无线信息传输(wireless information transfer,WIT)和无线能量传输(wireless energy transfer,W...本文介绍一种新型的数能一体化无线通信网络(data and energy integrated communication networks,DEINs),它将传统的无线网络中相互独立的无线信息传输(wireless information transfer,WIT)和无线能量传输(wireless energy transfer,WET)融合起来,实现数据和能量的协作同传.传统的无线携能通信(simultaneous wireless information and power transfer,SWIPT)侧重在物理层进行,本文所提出的数能一体化网络则强调系统性,在网络各层设计并实现相应的协议和资源分配.与其他再生能源如风能太阳能等不同,数能一体化网络DEINs中的能量源,即基站的射频(RF)信号,不受自然环境的影响,而且完全可控.数能一体化网络在解决无线通信系统的能效问题、实现无线通信的节能减排方面具有巨大的潜力.本文从两个方面阐述所提出的数能一体化网络:能量和网络.在能量方面,本文介绍并分析了数能一体化网络的能量编码、能量模型、能量管理等.在数据网络方面,本文对数能一体化网络的各层讨论了几种核心技术,包括物理层、数据链路层协议及联合资源分配、网络层以及数能一体化网络的典型网络应用场景.在各层的介绍中,本文着重于新方向的讨论,而非现有研究工作的简单重述.最后,本文对该领域未来的发展趋势和研究方向作了总结和展望.展开更多
基金supported by the National Science and Technology Major Project under Grant 2018ZX03001016
文摘Dynamic resource allocation(DRA) is a key technology to improve system performances in GEO multi-beam satellite systems. And, since the cache resource on the satellite is very valuable and limited, DRA problem under restricted cache resources is also an important issue to be studied. This paper mainly investigates the DRA problem of carrier resources under certain cache constraints. What's more, with the aim to satisfy all users' traffic demands as more as possible, and to maximize the utilization of the bandwidth, we formulate a multi-objective optimization problem(MOP) where the satisfaction index and the spectrum efficiency are jointly optimized. A modified strategy SA-NSGAII which combines simulated annealing(SA) and non-dominated sorted genetic algorithm-II(NSGAII) is proposed to approximate the Pareto solution to this MOP problem. Simulation results show the effectiveness of the proposed algorithm in terms of satisfaction index, spectrum efficiency, occupied cache, and etc.
文摘本文介绍一种新型的数能一体化无线通信网络(data and energy integrated communication networks,DEINs),它将传统的无线网络中相互独立的无线信息传输(wireless information transfer,WIT)和无线能量传输(wireless energy transfer,WET)融合起来,实现数据和能量的协作同传.传统的无线携能通信(simultaneous wireless information and power transfer,SWIPT)侧重在物理层进行,本文所提出的数能一体化网络则强调系统性,在网络各层设计并实现相应的协议和资源分配.与其他再生能源如风能太阳能等不同,数能一体化网络DEINs中的能量源,即基站的射频(RF)信号,不受自然环境的影响,而且完全可控.数能一体化网络在解决无线通信系统的能效问题、实现无线通信的节能减排方面具有巨大的潜力.本文从两个方面阐述所提出的数能一体化网络:能量和网络.在能量方面,本文介绍并分析了数能一体化网络的能量编码、能量模型、能量管理等.在数据网络方面,本文对数能一体化网络的各层讨论了几种核心技术,包括物理层、数据链路层协议及联合资源分配、网络层以及数能一体化网络的典型网络应用场景.在各层的介绍中,本文着重于新方向的讨论,而非现有研究工作的简单重述.最后,本文对该领域未来的发展趋势和研究方向作了总结和展望.
