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Considering an incomplete signals acquisition due to a sparse beacon deployment, this paper proposes a generalized similarity filter to improve the performance of proximity detection and thus guarantee the quality of proximity-based service (PBS). In particular, this paper leverages Bluetooth Low Energy (BLE) Beacons to realize a PBS system which comprises a number of Proximities of Interest (PoIs)...
In this paper, we propose a network virtualization based integrated train ground communication system for urban rail transit systems. In order to improve the CBTC subsystem performance during handoff, we propose a novel handoff scheme to support handoff between virtual networks. The application layer QoS parameter of the CBTC, PIS and CCTV subsystems is used as the performance measure in the handoff...
The underlying networks (of the Internet) have been reworked to make way for new technologies, some serious inefficiencies and security problems have arisen. As a result, over the past years, fundamentally new network designs have taken shape and are being tested. In ITU Recommendation Y.3001 [1], four objectives are identified in line with the requirements for Future Network; one of them is data...
The wireless mobile network is a dynamic environment. The characteristics of the wireless mobile communication include limited channel bandwidth, high BER, dynamic change over time, unstable channel quality, mobile node, competition of multiple users to share the channel, and the users' wireless signal interference from other nodes of the shared channel. These characteristics of wireless communication...
With the improvement and maturity of 3G network, the wireless communication rate for the users has become more and more high. Every research institution will focus gradually shift to long term evolution Version (LTE) of 3G network. In this paper, 3GPP LTE security mechanisms are introduced in detailed; the security architecture of LTE/SAE is present; the key structure and domain security of the network...
A new random number generate algorithm based on users' location information and spectrum information (ULSI) for cognitive radio networks is proposed in [1, 2].Through experiments analysis, the paper draws the conclusion that: random numbers generated from ULSI algorithm has good performance in statistical distribution. According the random numbers generated from ULSI algorithm, different types of...
Cognitive radio networks (CRN) brings rapid development of communication technologies and provides a good solution for heterogeneous networks merging. However, security of CRN becomes the key concern issue. Security of the encryption key is one of the most important factors in communication. Through analysis, we found that: key generation of cognitive radio networks is more dependent on the network...
The advanced audio video coding standard-mobile version (AVS-M) is established by AVS Working Group of China for mobile multimedia applications. To meet demands for communication between multimedia source and mobile system, transcoding from MPEG-2 to AVS-M is a key technology. In this paper, we propose a macroblock layer rate control algorithm for MPEG-2 to AVS-M transcoding with the consideration...
AVS-M (the advanced audio video coding standard-mobile version) is established by Audio Video Standard Working Group of China for mobile-multimedia applications. To meet demands for communication between multimedia source and mobile system, transcoding from MPEG-2 to AVS-M is a key technique. However, the advanced intra and inter mode decision techniques adopted in AVS-M have a high computing requirement,...
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