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An enhanced VPN gateway is designed employing the architecture of dual ARM hosts + FPGA isolator in this paper. The ARM hosts routed IP packets. The FPGA isolator ferried packets between inner and outer networks of two ARM hosts, authenticated the input packets and signed the output packets, thus the non-confidential packets was isolated. The private protocol is used to build the mutual authentication...
Resource allocation in cooperative networks is an efficient way to improve maximum attainable rate, to decrease power usage, and to prolong networks lifetime. In this paper, we study the lifetime maximization problem for multi-source multi-relay multi-destination cooperative orthogonal frequency division multiplexing(OFDM) networks with decode-and-forward protocol. It is a mixed-integer programming...
The system is designed to protect the key data of enterprise. It consists of three modules: module for host information security monitoring and auditing, module for document security management and protection, and module for mobile storage management and protection. It constructs multi-level security model concerning data security combining with authentication and authorization management, data confidentiality...
A private mobile communication can provide encrypted voice, SMS and other business, and it can implement more than 100 significant tasks of nation and army, becomes the indispensable communication means for office business and various military tasks at all levels of the head quarters. The integration trend of private mobile communication network and internet, is effected by the 3 main factors: technology,...
The safe problem of mobile communication attracts more and more attention in recent years. In this paper, key technologies for encryption communication of mobile station are studied and an efficient scheme of encryption communication of mobile phone is proposed. An encryption algorithm of anti-RPE-LTP coding is then presented to realize safe end-to-end communication for mobile phone.
The performance of the iteration combining-equalization (ICE) and its frequency domain implementation for high frequency high data rate transmission systems is excellent. However the convergence of the algorithm is difficult to analysis due to the iterative processing is used. In order to solve this problem, a performance analysis method is proposed through following the mutual information transfer...
To prolong the network lifetime, the energy usage of the nodes must be balanced in cooperative orthogonal frequency division multiplexing(OFDM) system with decode-and-forward(DF) protocol. In this paper, the system objective is minimize the total energy cost of the source and the relay. Then optimal resource allocation method based on dual decomposition is presented to resolve the system model. Simulations...
MEMS optical switches based on torsional micromirror are being developed for application in optical cross connects, add-drop multiplexers, and spectral equalizers etc. The main obstacle in improving their switching performance is the long settling time and the limited torsional angle result from excessive residual vibration and pull-in phenomenon. In this paper, these two major problems are studied...
Aiming at both prolonging the lifetime of the networks and decreasing the end-to-end delay of the networks, we apply GSP (generalized second price) auction game to the problem of joint bandwidth allocation and routing in low-medium-altitude platforms-based PMP/Mesh networks. In the paper, this problem is first modeled as GSP auction game. To decrease the computation overhead of resolving algorithm,...
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