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In this paper, we study the physical layer security in the downlink Non-Orthogonal Multiple Access (NOMA) systems with the capability of simultaneous wireless information and power transfer (SWIPT). In our system, each user applies the optimum power splitting (PS), in order to coordinate the energy harvesting and information decoding at the receiver. The optimization problem is formulated as the optimal...
Ever since Chinese electric power reform in 2002, different live test approaches were introduced and applied in relative industries. There were at least 26 live test approaches applied in the field of power transformation, power transmission and power distribution. The essay introduced a comprehensive dynamic and flexible effectivity evaluation system, which helped to evaluate the strengths and weaknesses...
In order to expand the scale of wireless multi-hop cooperative network, improve the network fault tolerance and reduce network establishment delay, we combine the centralized and distributed scheduling mechanisms. When the network scale is small, the distributed mechanism can reduce the scheduling delay. When the network scale is large, the centralized mechanism can improve network stability. The...
We consider traffic engineering (TE) in networks where quality of service (QoS)-guaranteed as well as best effort (BE) services are present. We propose a joint TE optimization technique for both QoS and BE traffic using multi-objective optimization framework. We show that joint TE optimization results in more efficient network resource usage compared to sequential TE methodology where TE decision...
In this paper, we introduce new solutions to handle real-time video traffic, such as video conferencing, in the future software-defined radio access networks. The real-time video is well-known for its high peak-to-mean rate ratio. This is a major challenge for traffic engineering and radio resource allocation, especially in small cell radio networks. We first propose an online method to dynamically...
Software defined networking (SDN) decouples control plane functionality from the data plane and features the presence of programmable dumb network devices, which have no or little intelligence and take control commands from a central controller at the control plane. The central controller is responsible for controlling data plane hardware and optimizing network operation. Centralized network optimization...
It is important to scientifically and reasonably allocate reliability factor for system design, development and experiments. Based on some kinds of traditional used methods of reliability factor allocation, one allocation method based on synthetically grading method is introduced. In this paper, this method is modified for reliability factor allocation based on synthetically grading. It is suitable...
Wireless sensor and robot networks (WSRNs) have emerged as a paradigmatic class of cyberphysical systems with cooperating objects. Due to the robots?? potential to unleash a wider set of networking means and thus augment the network performance, WSRNs have rapidly become a hot research area. In this article, we elaborate on WSRNs from two unique standpoints: robot task allocation and robot task fulfillment...
We propose a localized address autoconfiguration (LaConf) scheme for wireless ad hoc networks. Address allocation information is maintained on the network border nodes, called addressing agents (AAs), which are locally identified by geographic routing protocol GFG. When a node joins the network, it acquires an address from a neighboring AA (if any exists) by local communication or from the head AA...
With the increasing complexity of the project, how to coordinate the interests of project stakeholders has become a practical problem urgent to be solved, fair and reasonable interests coordination mechanism plays an important role for the success of the project. Therefore, the project's risk-sharing and benefit distribution among stakeholders is studied in this article, and we hope it could provide...
We consider a practical application of intelligent vehicles for intersection traffic control. Specially, we study the intersection traffic control problem using reservation-based intersection traffic control system, which utilizes the information exchange between intelligent vehicles and management agents around the intersections to direct traffic, instead of traffic lights. We focus on how to design...
WiMAX, as a key standard in last-mile access, is expected to support QoS guarantees for multi-services. Developing adaptive bit and power allocation according to quality of service (QoS) requirements is important to different services. In this paper, an adaptive multi-service bit and power allocation based on game theory is proposed for orthogonal frequency division multiplexing (OFDM) WiMAX networks...
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