基于软件定义网络的下一代移动通信网络及业务分片策略和试验(英)

Software-Defined Network(SDN)empowers the evolution of Internet with the OpenFlow,Network Virtualization and Service Slicing strategies.With the fast increasing requirements of Mobile Internet services,the Internet and Mobile Networks go to the convergence.Mobile Networks can also get benefits from the SDN evolution to fulfill the Sth Generation(5G) capacity booming.The article implements SDN into Frameless Network Architecture(FNA) for5G Mobile Network evolution with proposed Mobile-oriented OpenFlow Protocol(MOFP).The Control Plane/User Plane(CP/UP)separation and adaptation strategy is proposed to support the User-Centric scenario in FNA.The traditional Base Station is separated with Central Processing Entity(CPE) and Antenna Element(AE) to perform the OpenFlow and Network Virtualization.The AEs are released as new resources for serving users.The mobile-oriented Service Slicing with different Quality of Service(QoS) classification is proposed and Resource Pooling based Virtualized Radio Resource Management(VRRM) is optimized for the Service Slicing strategy with resource-limited feature in Mobile Networks.The capacity gains are provided to show the merits of SDN based FNA.And the MiniNet based Trial Network with Service Slicing is implemented with experimental results.     

海螺沟景区地质灾害基本情况与控制因素

海螺沟景区地处青藏高原向四川盆地的过渡带中,邛崃山脉与横断山脉大雪山支脉之间,磨西河贯穿全区。受构造影响,具典型山地地貌景观,地形坡度陡,相对高差大;受高原气流和季风影响,气候变化大,寒冻风化作用强烈;近年来,随着经济的发展,公路交通、水利水电建设工程日益增多,区内森林、植被破坏。因此,以滑坡、泥石流、崩塌为主的地质灾害频繁发生,危害严重~([1])。在地形地貌、地质构造、降雨、地震、河流侵蚀、岩土体结构类型、植被发育和人类工程活动等诸多地质灾害形成条件的共同作用下产生地质灾害,其中地质灾害形成的基本条件是地形地貌、地质构造、岩土体结构及地层岩性类型等,而地质灾害的诱发因素有地震、降雨及人类工程活动等~([2])。