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Network function virtualization (NFV) is a powerful emerging technique with widespread applicability. It provides Network Functions (NFs) through software virtualization techniques that decouple software and hardware. Some connected network functions constitute a service function chain (SFC). Therefore, the deployment of SFCs is much agile and simple. However, this leads to more service failure. The...
Software-defined networking (SDN) develops a logically centralized control plane by abstracting the underlying network forwarding devices, which makes the control of network traffic more flexible and more intelligent. In SDN, a switch can only work according to the rule of the flow tables received from its controller. Once the controller breaks down, the switch cannot transmit the incoming data packet...
LTE-PON hybrid access architecture for Power Distribution Communication Network (PDCN) allows a good trade-off among cost, flexibility, and reliability. In this paper, we focus on the case where LTE-based wireless power private network already deployed in PDCN and Aggregation Points (APs), which forward data between client terminals and the control center, can be served by either LTE network or PON...
With the rapid development of converged network technology, the network shows an obvious trend to be heterogeneous. In order to solve this problem, this paper proposes a multi-controller collaborative interconnection architecture for multilayer heterogeneous SDON (Software Defined Optical Network). And to enable this architecture, OpenFlow protocol is extended accordingly. Furthermore, the inter-domain...
The prediction of PM2.5 is difficult because the variation of PM2.5 concentration is a nonlinear dynamic process. Therefore, a recurrent fuzzy neural network prediction method is proposed to predict the PM2.5 concentration in this paper. Firstly, the partial least squares (PLS) algorithm is used to select key input variables as a preprocessing step. Then, a recurrent fuzzy neural network model is...
In this paper, we proposed a novel OTSS-assisted optical network architecture for smart-grid communication networks, which has unique requirements for low-latency connections. Illustrative results show that, OTSS can provide extremely better performance in latency and blocking probability than conventional flexi-grid optical networks.
Due to the lack of spectrum resource of power wireless private network, it is difficult to guarantee the transmission for the services in the distribution network. In order to enhance the network resource utilization, this paper puts forward a method for the uplink resource scheduling of power wireless private network based on NB-IoT and LTE hybrid transmission. Firstly, through the cognizing for...
This paper proposes a cross-layer collaborative interconnecting approach for the multi-control domain SDON networks. It's able to optimize network resources and achieve the real-time response of the network state. We use this approach to handle the traffic in single control domain and multi-control domain, which optimize transmission of the large granular traffic and the small granular traffic in...
Device to Device (D2D) multicast communication is an effective method for local transmission. In this paper, a joint power and resource allocations scheme is proposed to maximize the number of accessed D2D groups while minimizing the total terminal transmission power for D2D underlay multicast communication. Since the derived optimization is a mixed integer nonlinear programming problem with high...
LTE-based Public Safety Network (PSN) is a wireless communication network which can provide efficient and reliable communication in disasters or emergencies for disaster relief and public protection. Therefore, ensuring that network congestion will not happen in PSN during an emergency is becoming increasingly important. LTE-based PSN is easy to be congested because part of spectrum resources is compressed...
This paper proposes a novel Gain-Aware Uplink-Downlink(GAUD) jointly resource allocation scheme to maximize the Device-to-Device(D2D) throughput while guaranteeing Quality of Service (QoS) of cellular users. We formulate the global optimization problem as a mixed integer nonlinear programming problem and decompose it into three sub-problems. Firstly, a method of jointly uplink and downlink reuse mode...
This paper intends to evaluate the impact of the wire tightness degree on circular pad with different Archimedean spiral coil size in Inductive Power Transfer (IPT) system. The effect mainly focuses on the sensibility of coupling coefficient to misalignment and gap variation with constant self-inductance when the dimension of the secondary coil is fixed. In this paper, the larger outer diameter of...
The delivery of services typically requires packets to be steered through a sequence of middleboxes to improve network security and performance. One constraint on the deployment of services is that middleboxes are tightly coupled to the physical network topology. As a result, ensuring successful deployment requires error-prone and complex low-level configurations. Software-Defined Networking (SDN)...
This paper proposes a risk assessment model of key service and optimization methods to reduce service risk in smart grid communication network. Firstly, we analyze the probability of failure of communication link and node which is induced by external factors, like natural disaster, human attack and system disturbances. Then using importance of services, links and nodes, we build the risk model of...
software-defined networking (SDN) uses a centralized control plane to manage the whole network. If the scale of the network is large, it is necessary to divide it into multiple domains. Since the network scale becomes larger, the probability of failure occurrences is higher. Therefore, it is important to guarantee the control plane resilience in multi-domain SDN. However, the existing approaches cannot...
Recently, densified small cell deployment with overlay coverage through Heterogeneous Networks (HetNets) has emerged as a viable solution for 5G mobile networks. Cell Outage Detection (COD) which is the essential functionality in Self-Organizing Network (SON) is designed to autonomously deal with unexpected faults. Typical methods for detecting cell outage are usually based on Manual Drive Tests (MDT)...
Vulnerability assessment and optimization for wide area monitoring, protection and control system (WAMPAC) can enhance the robustness and sustainability of network. However, current assessment methods are incomplete and optimization methods ignore dynamic process. A comprehensive vulnerability assessment and optimization method is proposed. Firstly, for assessment, a comprehensive vulnerability indicator...
To reduce the energy consumption in heterogeneous 5G access networks, we propose a cooperative energy-saving mechanism based on user association (UA-CESM). Joint processing (JP) and centralized resource scheduling are introduced into the mechanism to solve inadequate coverage problem caused by base-station (BS) dormancy by means of cooperative BS selection and BS state control. First, the number of...
Regarding the problems such as long response time, unbalanced job scheduling load and low implementation efficiency of traditional distributed logistics inventory system, this article proposed the Hadoop dynamic load balance scheduling algorithm based on heartbeat feedback. According to Hadoop scheduling model and working principle of cloud computing, it analyzed the map and reducer function role...
In order to establish a distributed intelligent logistics warehousing management information system under cloud computing environment, and realize the dynamic optimization and warning of logistics inventory, it proposed the distributed logistics inventory model based on cloud computing. Firstly, it analyzed the characteristics of existing distributed inventory model and the advantages of cloud computing,...
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