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Using the low earth orbit (LEO) satellite technology to provide high capacity and high speed data service for the users, has been one of the most popular research hotspots in LEO satellite communication system. Whereas, the traditional researches in the field of satellite communication mainly focus on the optimization of channel resource allocation, which is based on the improvement of data transmission...
Current large-scale computing services, such as online social networking and web searching, make the wired links in the data centers with an Ethernet infrastructure oversubscribed. Therefore, researchers consider to augment the data centers with wireless communication, called a hybrid data center network (HDCN), to improve the communication flexibility and network capacity. In this paper, we investigate...
Up to now, classical Quantum Particle Swarm Optimization Algorithm in the late period of convergence has showed some drawbacks, such as population diversity reduce, convergence speed slow down and easy to fall into local optimal solution. This paper improves the classic QPSO algorithm and proposes Grouped Quantum-inspired Particle Swarm Optimization (G-QPSO). In this algorithm, quantum particles are...
In this paper, we focus on an energy efficient resource allocation in the multi-secondary user (SU) cognitive radio networks with network coding based cooperative transmission (NcCT). We set up a framework for multi-SU resource allocation game with Nash bargaining solution (NBS) under the cognitive radio scenario (CR-MSU-NBS game) where the sum of pairwise NBS function with pairing strategy is exploited...
Based on the theory of non-convex interval goal programming and the discrete resources ideology, this paper constructs three basic storage resources allocation models, to illustrate the relationship between the aggregate requirement and the gross capability of storage in a group enterprise. Numerical results for the oil country tubular goods (OCTG) of 17 subcompanies of a group oil enterprise, verified...
A two-user decision making game is studied in the OFDM based subscriber cooperative relaying network, in which subscribers transmit their own data in the first phase, while helping to retransmit their partner's or choosing to freeride in the second phase. In the paper, we study a hierarchical game (HG) for a two user coalition, where cooperation is preferred and total payoff is transferable. Instead...
In this paper, we consider joint optimization of end-to-end data transmission and resource allocation for Wireless-Infrastructured Distributed Cellular Networks (WIDCNs), where each base station (BS) in a cell is connected with its neighboring BSs via wireless links, and a mobile station (MS) can access one or multiple adjacent BSs simultaneously through time-varying OFDMA channels. The communications...
An adaptive resource allocation scheme for QoS oriented OFDMA system, which schedules two different utility functions for the Real-time/Non Real-time traffic simultaneously, is proposed in this paper. Instead of partial consideration of uniform kinds of QoS, we introduce an updating ratio factor to schedule users of heterogeneous traffic. Due to the complex optimization objective, the general convex...
Nowadays, system and network resource management software should deal with more and more heterogeneous specific interfaces of different resource. This is a tightly-coupled management model. Recent years, Web Services have become the major technology and architecture of SOA for enterprise applications. Web Services provides a loosely-coupled management model. In this paper, based on the Web Services-based...
OFDM has become one of the most important Beyond-3G transmission technologies. Mobile WiMAX is a typical representative of OFDM systems. The cross-layer optimization problem of inter-cell coordinated resource allocation for OFDM systems is addressed in this paper. We first analyze the problem by utility-based method, and formulate this optimization problem. Then the globally optimal and a sub-optimal...
This article regarded the popularization of GIS as a starting point. It researched the feasibility of the transformations based on special GIS to popular GIS. It proved the popular spatial information service platform structure mainly from data base, technical feasibility, system framework, function frame and user perspective. And it also gave a future construction idea about popular spatial information...
Generally, every Website provides its own resource upload and download modules for users to share resources. However, the resources uploaded to Websites' servers are often lack of unified and professional management. Whatpsilas more, when the amount of user using the upload and download modules increases, it will put a big pressure on the Websitepsilas server in term of bandwidth. To solve these problems,...
In this paper, we consider a 2-hop wireless relay network where more than one relay is available. We explore optimal relay selection for decode-and-forward cooperative protocol to minimize the outage probability under a short-term power constraint. We first investigate the impact of power control on relay selection from a capacity point-of-view. Assuming the knowledge of channel gain magnitudes, we...
Uplink resource allocation in OFDMA cellular networks enhanced with two-hop fixed relays is studied in this paper. A resource optimization problem that maximizes sum uplink throughput of all users is formulated under path selection and PHY/MAC constraints. The dual decomposition method is adopted to solve the problem efficiently and optimally. Dual problem of the primal problem is decoupled into N...
With the rapid development of WWW, grid and IPv6, more and more collaborative science and technology research systems and applications have been built on Internet in many countries. SOA and Web2.0 bring new opportunities for collaboration in scientific research. We construct a digital collaborative R&D Platform for TNList (Tsinghua National Library for Information Science and Technology). This...
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