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Changshu, China

Jin Y.,Changshu Institute of Technology | Li R.G.,Changshu Museum
Journal of Information Hiding and Multimedia Signal Processing | Year: 2016

In wireless multimedia sensor networks, there are some problems, such as how to guarantee stability of multimedia sensors, how to maintain the reliable multimedia stream transmission, as well as how to establish the cooperative route of multimedia data with multimedia sensors. To address the above issues, we researched the characteristics of multimedia sensors based on throughput, packet error rate and average delay, building upon which we proposed the opportunistic cooperative QoS analysis model based on the threshold values such as the GOP length, UDP datagram size, relay sensor scale and video Frame density. Then the opportunistic cooperative QoS guarantee protocol based on GOP-length and Video Frame-diversity (OCQ-GF) was proposed. More importantly, the sender and relay sensors would do the QPSK modulation scheme with 12 frequency division to further improve the performance of the proposed OCQ-GF mechanism. The mathematical and simulation results show the proposed OCQ-GF could perform better in terms of throughput, packet error rate and average delay, as well as Peak Signal to Noise Ratio (PSNR), compared with the traditional cooperative QoS guarantee approach. © 2016. Source


Jin Y.,Changshu Institute of Technology | Li F.,Changshu Institute of Technology | Fan Y.,Changshu Institute of Technology | Li R.,Changshu Museum | Dai H.,Changshu Institute of Technology
Journal of Communications | Year: 2014

In mobile Internet of Things, it is one key issue how to provide the reliable guarantee of transmission over sensors in connection with the services diversity, dynamic topology and various unknown interference. To solve these problems, we analyzed the Forward Error Control (FEC) sensing technology based on Cyclic Redundancy Check (CRC) and adaptive Multiple Input Multiple Output (MIMO) approach, building upon which we proposed the reliable transmission control scheme, in order to guarantee the Quality of Services. The mathematical analyses and NS simulation results show that the proposed transmission control scheme maintain the better performance such as throughput, reliability, real time performance and energy efficiency, than the FEC alone and MIMO alone approaches. © 2014 Engineering and Technology Publishing Source


Jin Y.,Changshu Institute of Technology | Li R.,Changshu Museum | Dai H.,Changshu Institute of Technology | Zhang J.,Taiyuan University of Technology
Eurasip Journal on Wireless Communications and Networking | Year: 2015

In real-time multimedia applications, the most problems are how to store, process, and transport the multimedia data with cloud, how to optimize the cloud platform to satisfy the user demand, as well as how to provide the quality of service (QoS) guarantees by combining cloud platform and wireless sensor networks (WSNs). To overcome these issues, the multimedia cloud was designed according to the characteristics of group of pictures (GOP), determining degree, and video frame density. The opportunistic dynamic multimedia cloud platform was proposed on the basis of the variation of packet error rate, decodable frame ratio and peak signal-to-noise ratio (PSNR) with channel quality. Then, the optimal multi-relay hierarchical cooperative multimedia transmission scheme was designed and implemented by reconstructing the cooperative multimedia stream based on the framing of GOP. For enhancing the multimedia cloud computing efficiency and decreasing the complexity of encoding and decoding of multimedia stream, we combined the opportunistic dynamic multimedia cloud platform and cooperative multimedia stream, which can also enhance the resources utilization of WSNs. Finally, the QoS guarantee protocol with the combination of opportunistic dynamic multimedia cloud platform and cooperative multimedia stream for WSNs (ODM-CM-WSN) was presented. Especially, the layered architectural model for multimedia applications and the opportunistic cooperative multimedia cloud service model were developed. The mathematical and simulation results demonstrate that the proposed QoS guarantee protocol can satisfy the various requirements of multimedia applications and provide reliable and efficient cloud services with WSNs. © 2015, Jin et al. Source


Jin Y.,Changshu Institute of Technology | Li R.,Changshu Museum | Fan Y.,Changshu Institute of Technology | Shen L.,Changshu Institute of Technology
International Journal of Online Engineering | Year: 2015

It is well known that the performance of Internet of Things application services is easy to be affected by internal noise of sensor, external environment interference and constriction of system resource. In order to solve the above problems, we studied the characteristics of bit error rate, outage ratio, signal to noise, and scale of relay sensors with channel state to choose the optimal transmission control scheme between direct mode and cooperative mode, building upon which we proposed the opportunistic cooperative automatic repeat request (ARQ) mechanism based on the rules and features of throughput ratio, average delay, packet error rate and energy efficiency, in consideration of retransmission time and channel quality. More importantly, the proposed opportunistic cooperative ARQ mechanism could set up the max retransmission time and control the progress of cooperative transmission according to the real-time network and sensor state, as well as Quality of Services (QoS) guarantee requirements of Internet of Things applications. The mathematical analyses and experiment results show that the proposed scheme is superior to the QoS provisioning schemes based on cooperative ARQ alone and direct transmission with channel state alone in terms of reliability, real time performance and life cycle of system, as well as energy efficiency. Source

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