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In Long Term Evolution-Advanced (LTE-A) system, collaborative MIMO schemes are widely proposed as a method to mitigate inter-cell interference (ICI). In this paper, we develop a collaborative MIMO scheme called multi-layered rate control (MLRC). Simulation results reveal that the proposed scheme improves the cell-edge UE performance without sacrificing the average sector throughput compared to fractional...
In Content-centric Networking (CCN), in-network caching can enhance content delivery at a global scale without requiring special infrastructure. In this paper, we propose a lifetime-based greedy caching approach (LBGC) which involves both caching decision and cache replacement. Contents are preferred to be stored in nodes with high betweenness centrality, and only expired cache items can be replaced...
Opportunistic routing (OR) is widely regarded as a promising way to improve the transmission reliability in wireless multi-hop networks. However, additional overheads introduced by OR such as duplicate transmission and collision avoidance overhead degrade the transmission efficiency. In this paper, an analytical model based on open queueing network with markov chains is proposed to evaluate the efficiency...
By utilizing the multi-channel technology and small world properties, the average path length of a wireless network can be reduced drastically, leading to a significant improvement of network performance. By upgrading a fraction of nodes into the high-level nodes with multi interfaces and higher transmission powers, small world effect can be introduced owing to the short-cuts created by the high-level...
By utilizing the multi-channel technology and small world properties, the average path length of a wireless network can be reduced drastically, leading to a significant improvement of network performance. It has been proven that, by upgrading a fraction of nodes into the high-level nodes with multi interfaces and higher transmission powers, small world effect can be introduced owing to the shortcuts...
Interference and unreliability of wireless transmissions limit the throughput of wireless sensor networks. Multi-radio multi-channel technology shows its prospect to significantly improve the network capacity by reducing co-channel interference, and opportunistic cooperative offers a great chance to cope with the unreliability of wireless transmissions. In this paper, we present a multi-radio multi-channel...
The performance of routing protocols in MANETs is significantly influenced by the mobility of wireless devices. Recently, many social based mobility models generate synthetic traces to capture the statistical properties detected from real traces, leaving the cause of these movement patterns untouched. As a highlighted novelty of this paper, we explore the driving force of complicated social behaviors...
While multi-channel allocation has been studied in many networks by different theories, asymmetric channel characteristics are seldom considered. This paper considers the channel selection problem in wireless Ad hoc networks from the game-theoretic viewpoint, which is based on the assumption that quality discrepancy exists between the candidate channels. A simple saturation throughput model is presented...
We propose a multi-agent based intrusion detection system (MAIDS) for wireless sensor networks in this paper. According to the features of the clustered wireless sensor network, by making the common nodes and the cluster headers carry out different detection tasks, and blending local detection with united detection ,at the same time using several agent blocks in order to realize data collection, detection,...
A novel method based on Time-Frequency correction was presented to extract motor imagery feature from brain signal. The 2b datasets of BCI competition IV were used in this paper. Time-frequency features of right and left hand motor imagery were extracted from train datasets, respectively. The frequency band and time segment were selected based on frequency and time correction. The features were extracted...
The application of multimedia teaching equipment enables the teachers to use multimedia computers and other equipment for human-machine interaction in order to complete the instruction. But the traditional manual management methods can't achieve the self-switching of multimedia equipment reducing the efficiency of multimedia teaching. A classroom multimedia teaching equipment management system based...
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