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QoS Guarantees of Multiuser Video Streaming over Wireless Links: delay constraint and Packet Priority Drop

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China Communications 2013年第3期10卷 133-144页

作者：冯正勇文光俊 School of Communication and Information Engineering University of Electronic Science and Technology of China School of Physics and Electronic Information China West Normal University

To provide a certain level of Quality of Service (QoS) guarantees for multiuser wireless downlink video streaming transmissions, we propose a multiuser scheduling scheme for QoS guarantees. It is based on the classic Queue-Length-Based (QLB)-rate maximum scheduling algorithm and integrated with the delay constraint and the packet priority drop. We use the large deviation principle and the effective capacity theory to construct a new analysis model to find each user's queue length threshold (delay constraint) violation probability. This probability corresponds to the upper bound of the packet drop probability, which indicates a certain level of statistical QoS guarantees. Then, we utilize the priority information of video packets and introduce the packet priority drop to further improve the quality perceived by each user. The simulation results show that the average Peak Signal to Noise Ratio (PSNR) value of the priority drop is 0.8 higher than that of the non-priority drop and the PSNR value of the most badly damaged video frame in the priority drop is on an average 4 higher than that of the non-priority drop.

关键词： QoS wireless multiuser scheduling delay constraint packet priority drop effective capacity large deviation

SINR Driven Joint Network Selection Policy in the Heterogeneous Internet of Things

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Chinese Journal of Electronics 2017年第4期26卷 842-848页

作者： LIU Xinyi JIANG Jian School of Information Engineering Chang'an University China Academy of Information and Communications Technology

In the heterogeneous Internet of things(Io T), the Signal to interference plus noise ratio(SINR)and delay constraint are two important factors that influence the throughput of Io T and the performance of *** recently, most network selection policy researches were based on either the Shannon theory or the signal strength, while the combined influence of the delay constraint and the SINR, which has a significant impact on resource utilization, is hardly considered. We therefore propose an SINR driven joint network selection policy, which incorporates the delay constraint and the signal strength into the SINR. This policy permits Io T users to access the network with the maximum of SINR from all the available networks under the delay and signal strength *** analysis and the simulation results show that the joint network selection policy can obtain the higher throughput of Io T and average SINR comparing with other polices.

关键词： Internet of things(IoT) Heterogeneous network Joint network selection policy Signal to interfer ence plus noise ratio(SINR) delay constraint

The Distributed Network Monitoring Model with Bounded delay constraints

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Wuhan University Journal of Natural Sciences 2004年第4期9卷 429-434页

作者： LIUXiang-hui YINJian-ping LUXi-cheng CAIZhi-ping ZHAOJian-min SchoolofComputerScience NationalUniversityofDefenseTechnologyChangsha410073HunanChina SchoolofComputerScience ZhejiangNormalUniversityJinhua321004ZhejiangChina

We address the problem of optimizing a distributed monitoring system and the goal of the optimization is to reduce the cost of deployment of the monitoring infrastructure by identifying a minimum aggregating set subject to delay constraint on the aggregating path. We show that this problem is NP-hard and propose approximation algorithm proving the approximation ratio with lnm+1, where is the number of monitoring nodes. At last we extend our modal with more constraint of bounded delay variation. Key words network - distributed monitoring - delay constraint - NP-hard CLC number TP 393 Foundation item: Supported by the National Natural Science Foundation of China (60373023)Biography: LIU Xiang-hui(1973-), male, Ph. D. candidate, research direction: algorithm complexity analysis, QoS in Internet.

关键词： network distributed monitoring delay constraint NP-hard

A delay-constrained energy-efficient component carrier adjusting scheme for LTE-Advanced systems

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High Technology Letters 2014年第3期20卷 237-244页

作者：陈华夏 Hu Honglin Key Laboratory of Wireless Sensor Network & Communication Shanghai Institute of Microsystem and Information Technology(SIMIT)Chinese Academy of Sciences(CAS) University of Chinese Academy of Sciences Shanghai Research Center for Wireless Communications(WiCO)

The energy efficiency and packet delay tradeoffs in long term evolution-advanced(LTE-A) systems are *** expressions are derived to explain the relation of energy efficiency to mean packet delay,arrival rate and component carrier(CC) configurations,from the theoretical respective which reveals that the energy efficiency of multiple CC systems is closely related to the frequency of CCs and the number of active *** on the theoretical analysis,a CC adjusting scheme for LTE-A systems is proposed to maximize energy efficiency subject to delay constraint by dynamically altering the on/off state of CCs according to traffic *** and simulation results show that for CCs in different frequency bands with equal transmit power,the proposed scheme could significantly improve the energy efficiency of users in all aggregation levels within the constraint of mean packet delay.

关键词： energy efficiency carrier aggregation (CA) delay constraint component carrier(CC) scheduling long term evolution-advanced systems

Genetic Simulated Annealing Algorithm for QoS Routing

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Genetic Simulated Annealing Algorithm for QoS Routing

Solving the Problem of the Link Optimizing and delayconstrained Multicast Routing Based on GA

2012年计算机应用与系统建模国际会议

作者： Zhang Hui Huang Jihai Information Engineering College Zhongzhou University

This paper proposes the math model of QoS routing. Then we present a genetic simulated annealing algorithm is proposed of QoS routing. The results show that the new method to enhance the search ratio and the speed of ... 详细信息

关键词： QoS routing delay constraint search ratio genetic simulated annealing algorithm

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cnki会议

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Solving the Problem of the Link Optimizing and Delayconstrai...