检索结果-南通市图书馆

admission control with Elastic QoS for Video on Demand Systems

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2012年第5期9卷 467-473页

作者： Fu-Shou Lin 1 Bao-Qun Yin 1,2 Jing Huang 1 Xu-Min Wu 1 1 Key Lab of Anhui Network Communication System and control, University of Science and Technology of China, Hefei 230027, China 2 National Network New Media Engineering Research Center, Institute of Acoustics, Chinese Academy of Science, Beijing 100190, China Key Lab of Anhui Network Communication System and control University of Science and Technology of China Hefei China National Network New Media Engineering Research Center Institute of Acoustics Chinese Academy of Science Beijing China

In network service systems, satisfying quality of service (QoS) is one of the main objectives. admission control and resource allocation strategy can be used to guarantee the QoS requirement. Based on partially observable Markov decision processes (POMDPs), this paper proposes a novel admission control model for video on demand (VOD) service systems with elastic QoS. Elastic QoS is also considered in resource allocation strategy. Policy gradient algorithm is often available to find the solution of POMDP problems, with a satisfactory convergence rate. Through numerical examples, it can be shown that the proposed admission control strategy has better performance than complete admission control strategy.

关键词： Partially observable Markov decision processes (POMDPs) admission control resource allocation elastic quality of service (QoS) policy gradient

An admission control Scheme for End—to—End Statistical QoS Provision in IP Networks

在线全文

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2003年第3期18卷 267-277页

作者：庞斌邵怀荣高文 Institute of Computing Technology The Chinese Academy of Sciences Beijing 100080 P.R. China Mitsubishi Electric Research Laboratories 201 Broadway Camberidge MA 02139 U.S.A.

This paper presents a distributed and scalable admission control scheme to provideend-to-end statistical QoS guarantees in IP network. The basic idea of the scheme is that the ingressrouters make admission control decisions according to the network status information obtained bysending probing packets along the selected routing path. Each router passively monitors thearriving traffic and marks the probing packets with its network status. The performance of thepresented scheme is evaluated with a variety of traffic models, QoS metrics and network *** simulation results show that the proposed scheme can accurately control the admissible regionand effectively improve the utilization of network resource.

关键词： admission control quality of service differentiated services performance evaluation traffic shaping statistical multiplexing

Joint Resource Allocation and admission control in Sliced Fog Radio Access Networks

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Communications 2020年第8期17卷 14-30页

作者： Yuan Ai Gang Qiu Chenxi Liu Yaohua Sun State Key Laboratory of Network and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China LTE&5G Wireless Product R&D Institute ZTE CorporationShenzhen 518057China

Network slicing based fog radio access network(F-RAN) has emerged as a promising architecture to support various novel applications in 5 G-and-beyond wireless networks. However, the co-existence of multiple network slices in F-RANs may lead to significant performance degradation due to the resource competitions among different network slices. In this paper, the downlink F-RANs with a hotspot slice and an Internet of Things(Io T) slice are considered, in which the user equipments(UEs) of different slices share the same spectrum. A novel joint resource allocation and admission control scheme is developed to maximize the number of UEs in the hotspot slice that can be supported with desired quality-of-service, while satisfying the interference constraint of the UEs in the Io T slice. Specifically, the admission control and beamforming vector optimization are performed in the hotspot slice to maximize the number of admitted UEs, while the joint sub-channel and power allocation is performed in the Io T slice to maximize the capability of the UEs in the Io T slice tolerating the interference from the hotspot slice. Numerical results show that our proposed scheme can effectively boost the number of UEs in the hotspot slice compared to the existing baselines.

关键词： NOMA fog radio access networks resource allocation admission control

The Impact of the Superposition Coding Concept on admission control Strategy in OFDMA-Based Network

在线全文

学校读者我要写书评

暂无评论

China Communications 2018年第6期15卷 68-83页

作者： Yosra Abbes Sameh Najeh Hichem Besbes Research Laboratory COSIM Sup'Com University of Carthage

admission control is a key mechanism to manage the increasing number of the simultaneous demanding services, requiring a desired Quality of Service(QoS) in a spectrum efficient manner. To address this issue,we investigate in this work, the use of the superposition coding technique to increase the system capacity through multiuser diversity exploitation. We propose a novel joint admission control and superposition coding formalism based on different utility functions:Opportunistic(OPSC), Great Fairness(GFSC)and Proportional Fairness(PFSC). Simulation results show the superiority of our proposed approaches over other by providing higher mean of served VoIP users and higher throughput while maintaining an average VoIP packet transmission delay lower than 0.6 ms.

关键词： admission control QoS superposition coding opportunistic great fairness proportional fairness VoIP users

Joint Optimization of admission control and Rate Adaptation for Video Sharing over Multirate Wireless Community Cloud

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

China Communications 2016年第8期13卷 24-40页

作者： Peng Zhao Xinyu Yang Department of Computer Science and Technology Xi'an Jiaotong University

Emerging wireless community cloud enables usergenerated video content to be shared and consumed in a social context. However, the nature of shared wireless medium and timevarying channels seriously limits the quality of service(QoS), partially owing to the lack of mechanisms for effectively utilizing multi-rate channel resources. In this paper, the joint optimization of admission control and rate adaptation is proposed, resulting in a bandwidth-aware rate-adaptive admission control(BRAC) scheme to provide bandwidth guarantee for sharing social multimedia contents. The analytical approach leads to the following major contributions:(1) a bandwidth-aware rate selection(BRS) algorithm to optimally meet the bandwidth requirement of the data session and channel conditions at the physical layer;(2) a routing-coupled rate adaption and admission control algorithm to admit data sessions with bandwidth guarantee. Moreover, extensive numerical simulations suggest that BRAC is efficient and effective in meeting the bandwidth requirements for sharing social multimedia contents. These insights will shed light on communication system implementation for multimedia content sharing over multirate wireless community cloud.

关键词： wireless community cloud multirate rate adaptation bandwidth guarantee admission control

Bandwidth allocation and admission control scheme based on Nash bargaining solution for WiMAX systems

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2010年第2期17卷 53-58页

作者： CAI Dao-jin ,JI Hong,LI Xi Key Laboratory of Universal Wireless Communications,Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876,China Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

Development of fair and efficient bandwidth allocation and admission control schemes is one of the key issues in the design of IEEE 802.16 broadband wireless access systems in time division multiple access （TDMA） mode. In this article, the problem of bandwidth allocation and admission control is formulated as a Nash bargaining model. The nash bargaining solution （NBS） derived from the cooperative game is adopted to maximize the spectrum utilization. Analysis and simulation results show that there is a unique Pareto optimal bandwidth allocation solution by using NBS among various flows. Furthermore, maximum utility of the system can also be maintained by using the admission control policy with different number of connections and variable channel qualities. The total throughput of the proposed scheme is close to the maximal one, while significantly improving fairness compared to the existing solutions.

关键词： NBS game theory bandwidth allocation admission control IEEE 802.16

Learning-Based admission control for Low-Earth-Orbit Satellite Communication Networks

在线全文

学校读者我要写书评

暂无评论

中兴通讯技术:英文版 2023年第3期21卷 54-62页

作者： CHENG Lei QIN Shuang FENG Gang University of Electronic Science and Technology of China Chengdu 611731China

Satellite communications has been regarded as an indispensable technology for future mobile networks to provide extremely high data rates,ultra-reliability,and ubiquitous ***,the high dynamics caused by the fast movement of low-earth-orbit(LEO)satellites bring huge challenges in designing and optimizing satellite communication ***,admission control,deciding which users with diversified service requirements are allowed to access the network with limited resources,is of paramount importance to improve network resource utilization and meet the service quality requirements of *** this paper,we propose a dynamic channel reservation strategy based on the Actor-Critic algorithm(AC-DCRS)to perform intelligent admission control in satellite *** carefully designing the longterm reward function and dynamically adjusting the reserved channel threshold,AC-DCRS reaches a long-run optimal access policy for both new calls and handover calls with different service *** results show that our proposed AC-DCRS outperforms traditional channel reservation strategies in terms of overall access failure probability,the average call success rate,and channel utilization under various dynamic traffic conditions.

关键词： satellite communications admission control dynamic channel reservation actor-critic

A New Self-Adapting admission control Algorithm for Differential Service in Web Clusters

在线全文

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2004年第5期9卷 749-754页

作者： LIUAn-feng CHENZhi-gang LONGGuo-ping CollegeofInformationScienceandEngineering CentralSouthUniversityChangsha410083.HunanChina

A new admission control algorithm considering the network self-similar access characteristics is proposed. Taking advantage of the mathematical model of the network traffic admission control which can effectively overcome the self-similar characteristics of the network requests, through the scheduling of the differential service qucue based on priority while at the same time taking into account various factors including access characteristics of requests, load information, etc, smoothness of the admission control is ensured by the algorithm proposed in this paper. We design a non-linear self-adapting control algorithm by introducing an exponential admission function, thus overcomes the negative aspects introduced by static threshold parameters. Simulation results show that the scheme proposed in this paper can effectively improve the resource utilization of the clusters, while at the same time protecting the service with high priority. Our simulation results also show that this algorithm can improve system stability and reliability too. Key words Web cluster - admission control - differential service - self-similar - self-adapting CLC number TP 393 Foundation item: Supported by the National Natural Science Foundation of China (10375024) and the Hunan Natural Science Foundation of China(03JJY4054)Biography: LIU An-feng(1971-), male, Ph. D candidate, majoring in network computing, Web QoS.

关键词： Web cluster admission control differential service self-similar self-adapting

Two-Level Cross-Talked admission control Mechanism for QoS Guarantee in 802.11e EDCA

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2008年第6期13卷 741-746页

作者：牛志升刘静 Department of Electronic Engineering Tsinghua University

This paper describes a two-level cross-talked admission control mechanism that guarantees quality of service （QoS） requirements for multimedia applications over wireless local area networks （WLANs）. An enhanced distributed channel access analytical model is used to compute the maximum number of admitted users according to the QoS requirements and the packet arrival characters. Then, some channel resources are reserved for handoff calls based on the maximum number of admitted users and the call-level traffic model. The channel utilization ratio is also measured to reflect the current system traffic load. The maximum number of admitted users and the channel utilization ratio are used for admission control for applications with QoS requirements in the call level and for rate control of best effort applications in the packet level using the p-nonacknowledgement scheme. Thus, the QoS requirements are statistically guaranteed while the system is efficiently utilized. Simulations validate the effectiveness of this mechanism to guarantee the QoS and bandwidth utilization.

关键词： wireless local area network enhanced distributed channel access quality of service admission control rate control