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国家自然科学基金(60971125)

作品数:10 被引量:20H指数:3
相关作者:田辉胡铮苗杰张平徐海博更多>>
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发文基金:国家自然科学基金国家科技重大专项国家高技术研究发展计划更多>>
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10 条 记 录,以下是 1-9
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基于多终端协同的业务流控制被引量:6
2012年
文章基于IP多媒体子系统(IMS)分层网络架构模型,设计了一种基于多终端的业务流控制系统构架。根据该系统架构和多终端协同的特征,文章提炼出基于多终端协同的业务流控制所面临的关键技术需求。满足这些需求可充分发挥网络与终端融合协同所带来的个人化、智能化业务能力,改善信息传输服务质量,为用户提供智能化业务体验。文章通过阐述两种典型的多终端协同应用场景——多网协作传输和移动性管理,说明了基于多终端协同的业务流控制所具有的重要意义。
田辉胡铮张平
基于时延的动态非连续接收周期调整机制被引量:3
2009年
针对LTE系统的下行非连续接收(DRX)机制,提出了一种基于业务时延要求的动态非连续接收周期配置算法.首先网络侧按照正常的非连续接收机制对终端侧进行节能配置,然后利用实时的时延大小对非连续接收周期进行动态控制.数值分析表明,业务时延与网络负载有密切的关系,用户DRX周期配置需要与网络当前负载相结合;仿真结果表明,基于时延的动态周期调整机制,能够即时的适应网络状况以及自身需求的变化,与固定非连续接收周期相比,在用户满意度以及节能性上都有更好的表现.
黄波田辉徐海博
Delay analysis of DRX in LTE-advanced considering carrier aggregation
2011年
The long term evolution advanced (LTE-advanced) standards target at high system performance comparable or superior to the requirements of the International mobile telecommunications advanced (IMT-advanced). In order to support backward compatibility with LTE, most of the key technologies have been retained in LTE-advanced, one of which is the discontinuous reception mechanism (DRX). LTE-advanced adopts carrier aggregation technology to extend the system bandwidth, which requires the LTE DRX applied in single-transceiver scenario to be adapted to multi-transceiver scenario with multiple component carriers. Apparently, carrier aggregation will influence the performance of DRX severely, so it's worth studying the impact brought by the coexistence ofLTE DRX and carrier aggregation on the system performance, e.g., the system delay. In this paper, first an overview of DRX in carrier aggregation scenario is given. Then it is modeled as a Markov process based on the queuing theory. Simulation results show that the independent component carrier configuration with a uniform Inactivity Timer achieves a superior service delay performance compared with other reference schemes.
ZHANG Yi-fanGAO Song-taoTIAN HuiHUANG Bo
关键词:LTE-ADVANCEDDRX
基于多目标进化的终端聚合选择算法研究被引量:2
2011年
当单一终端业务能力受限时,如何根据终端能力对异构终端进行有效聚合,以支持内容丰富的业务应用成为一个非常重要的问题。该文提出一种基于多目标进化的终端聚合选择算法,给出终端聚合的描述框架,构建基于个体和协同能力的0-1规划模型,包括多指标权重自动生成法,减轻用户负担,避免用户直接指定权重的困难。仿真结果表明,算法能得到一个Pareto最优解集,用户根据其对个体和协同表现的个人偏好或实际业务应用需要选择最满意的方案聚合终端,同时算法具有良好的可行性和有效性。
王灿如田辉苗杰
关键词:无线通信多目标进化PARETO最优
Stackelberg game theoretic pricing algorithm for bandwidth allocation in cooperative access被引量:1
2012年
Cooperative access among user devices by sharing wireless access bandwidth opens a new paradigm in heterogeneous networks. However, how to stimulate cooperative relay nodes forwarding service data for others and allocating corresponding bandwidth to support it are two key issues in the cooperative access. This paper proposes a Stackelberg game based framework which is benefit participants including relay nodes and client nodes. This framework generalizes the pricing based bandwidth allocation algorithm by the Stackelberg game model, which optimizes the profit of the cooperative relay nodes while guaranteeing the bandwidth requirements of client nodes, We transform the profit maximization problem into a convex problem and solve it using the convex optimization method. The simulation results demonstrate that the proposed framework and corresponding algorithms outperform the bidding weight proportional fairness and fixed value bandwidth allocation ones significantly.
MIAO JieHU ZhengZHANG Yi-fanGUI LiWANG Can-ruTIAN HuiYANG Kun
关键词:PRICING
Stackelberg-based dynamic incentive pricing algorithm in heterogeneous ubiquitous network
2009年
A challenge in the convergence of heterogeneous networks is how to combine the ubiquitous resources and provide the diversified individual services. This paper designs a market model for aggregating reconfiguration in heterogeneous networks based on the tradeoff between resource allocation and consumers' requirement. To unify the benefits of operators and consumers, a novel Stackelberg-based dynamic incentive pricing algorithm is proposed. The results of the theoretical analysis and simulation demonstrate that the proposed strategy provides incentive for cooperation by means of appropriate resource allocation, and improves the utilization of network resources, thereby effectively realizing the optimization of the whole network performance.
ZHANG LeiTIAN HuiWANG CanRu
Dynamic spectrum allocation for cell range extension in tiered Macro-Pico heterogeneous networks被引量:3
2013年
Heterogeneous networks are employed in the next generation communication systems to enhance the area spectral efficiency (ASE), where cell range extension (CRE) is a promising technique to improve the cell edge performance and utilize the low power node (LPN) resources more effectively. In this paper we propose a dynamic spectrum aUocation scheme for Macro-Pico scenario to mitigate both the co-tier and cross-tier interferences. The available system spectrum is divided into different parts by four steps, i.e. user set partition, service request collection, cross-tier occupation and CRE occupation decision, while the service request of each user is taken into consideration. During the process implementation, the reference signal receiving power (RSRP) threshold is derived by mathematical means to judge cell edge macro users when a predefined ratio is given. Simulation results show that the proposed scheme reaches almost the same cell edge performance with the best existing option, meanwhile provides higher overall system throughput and better spectral efficiency. Therefore, much better balance is achieved.
TIAN PengTIAN HuiGAO Li-qiZHANG JunWANG Meng
负载感知的异构无线网络协同休眠节能算法
2012年
提出了一种基于业务请求负载感知的异构无线网络自适应协同休眠节能算法,在满足异构无线网络系统内业务服务质量要求的条件下最小化系统功耗.该算法在异构无线网络自优化框架下建立基于经济学收益的节能模型.蒙特卡洛仿真结果表明,在满足用户业务请求阻塞率约束条件下,新算法能自适应调度异构无线网络的工作模式,并降低系统总功耗.
苗杰胡铮田辉桂丽陆磊
关键词:异构无线网络
Hybrid model of inter-stage spectrum trading in multistage game-theoretic framework
2011年
Dynamic spectrum access(DSA),consisting of spectrum sharing and spectrum trading stage,becomes a promising approach to increase the efficiency of spectrum usage and system performance.In this paper,from the perspective of individual interest optimization,we focus on strategy adaptation of network users and their interaction in spectrum trading process.Considering adverse effects on decision-making accuracy and the fairness among network users via local information acquirement,a hybrid game model based on global information of relevant spectrum is proposed to formulate intelligent behaviors of both primary and secondary users.Specifically,by using the evolutionary game theory,a spectrum-selection approach for the evolution process of secondary users is designed to converge to the evolutionary equilibrium gradually.Moreover,competition among primary users is modeled as a non-cooperative game and an iterative algorithm is employed to achieve the Nash equilibrium.The simulation results show that the proposed hybrid game model investigates network dynamics under different network parameter settings.
ZHANG Guo-yi HU Zheng TIAN Hui
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