Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004.最新文献_第3页

Service performance monitoring for EGPRS networks based on treatment classes 基于治疗类别的EGPRS网络服务性能监控

Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004. Pub Date : 2004-06-07 DOI: 10.1109/IWQOS.2004.1309368

D. Soldani, N. Lokuge, A. Kuurne

{"title":"Service performance monitoring for EGPRS networks based on treatment classes","authors":"D. Soldani, N. Lokuge, A. Kuurne","doi":"10.1109/IWQOS.2004.1309368","DOIUrl":"https://doi.org/10.1109/IWQOS.2004.1309368","url":null,"abstract":"GPRS/EDGE networks provide an opportunity for operators to offer new services to their potential and existing subscribers. Unlike circuit switched services, EGPRS services are dependent on a multitude of factors to guarantee a timely content delivery. To ensure that the contracted QoS is sustained, it is not sufficient to overprovision resources, fn addition, operators need to have tools for monitoring the QoS experienced by diverse packet flows in different network segments. This paper presents theoretically, and confirms experimentally, a simple mechanism to monitor throughput of distinct services across EGPRS networks, which enables a proactive and timely supervision of service level agreements and quality. The approach is based on the treatment class concept, which maps services with different performance requirements onto distinct QoS profiles. By means of treatment classes, defined by a subset of the bearer attributes, i.e. bit rates, priorities and traffic classes, it is possible to formulate metrics to measure the performance of distinct services within the network domains, without any visibility of the content carried by upper layer protocols. Experimental results show good agreement between throughput measurements in the network and the corresponding measured values at the application layer in the mobile terminals.","PeriodicalId":266235,"journal":{"name":"Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004.","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123592031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Local flow separation 局部流动分离

Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004. Pub Date : 2004-06-07 DOI: 10.1109/IWQOS.2004.1309362

V. Liberatore

引用次数: 3

Service availability: a new approach to characterize IP backbone topologies 服务可用性:描述IP骨干网拓扑的新方法

Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004. Pub Date : 2004-06-07 DOI: 10.1109/IWQOS.2004.1309386

Ram Keralapura, C. Chuah, G. Iannaccone, S. Bhattacharyya

{"title":"Service availability: a new approach to characterize IP backbone topologies","authors":"Ram Keralapura, C. Chuah, G. Iannaccone, S. Bhattacharyya","doi":"10.1109/IWQOS.2004.1309386","DOIUrl":"https://doi.org/10.1109/IWQOS.2004.1309386","url":null,"abstract":"Traditional SLAs, defined by average delay or packet loss, often camouflage the instantaneous performance perceived by end-users. We define a set of metrics for service availability to quantify the performance of IP backbone networks and capture the impact of routing dynamics on packet forwarding. Given a network topology and its link weights, we propose a novel technique to compute the associated service availability by taking into account transient routing dynamics and operational conditions, such as BGP table size and traffic distributions. Even though there are numerous models for characterizing topologies, none of them provide insights on the expected performance perceived by end customers. Our simulations show that the amount of service disruption experienced by similar networks (i.e., with similar intrinsic properties such as average out-degree or network diameter) could be significantly different, making it imperative to use new metrics for characterizing networks. In the second part of the paper, we derive goodness factors based on service availability viewed from three perspectives: ingress node (from one node to many destinations), link (traffic traversing a link), and network-wide (across all source-destination pairs). We show how goodness factors can be used in various applications and describe our numerical results.","PeriodicalId":266235,"journal":{"name":"Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004.","volume":"32 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134522422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 30

Paving the first mile for QoS-dependent applications and appliances 为依赖qos的应用程序和设备铺平了第一步

Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004. Pub Date : 2004-06-07 DOI: 10.1109/IWQOS.2004.1309390

M. El-Gendy, A. Bose, S.-T. Park, K. Shin

引用次数: 24

Policy-driven multifile distribution 策略驱动的多文件分发

Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004. Pub Date : 2004-06-07 DOI: 10.1109/IWQOS.2004.1309379

C. Rosenberg, P. Pons, Dongyan Xu

{"title":"Policy-driven multifile distribution","authors":"C. Rosenberg, P. Pons, Dongyan Xu","doi":"10.1109/IWQOS.2004.1309379","DOIUrl":"https://doi.org/10.1109/IWQOS.2004.1309379","url":null,"abstract":"This paper proposes to study the impact of a suite of policies on the performance of a multifile distribution system that integrates CDN and P2P techniques. One of the policies is the peer contribution policy that decides the limited data rate and data volume to be contributed by each peer. The peer contribution policy is critical to maintaining the system's overall file distribution capacity without unfairly overloading the individual peers. In our previous work, an analytical framework for the modeling of a hybrid CDN-P2P architecture under a file-specific peer contribution policy is presented. In this paper, we focus on a different scenario where multiple files are being distributed and the peer contribution policy is file-independent. We argue that suites of policies need to be studied, in order to understand their impacts on the overall file distribution performance. The policies include: (1) file-independent peer contribution policy, (2) file request admission policy, (3) supplier selection policy, and (4) file replacement policy. We define a system model for the analysis of these policies. Based on the model, we also propose possible definitions of the policies.","PeriodicalId":266235,"journal":{"name":"Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004.","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124293573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mobility assisted optimal routing in noninterfering mobile ad hoc networks 移动性辅助非干扰移动自组网的最优路由

Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004. Pub Date : 2004-06-07 DOI: 10.1109/IWQOS.2004.1309352

Jihui Zhang, Yunnan Wu, Qian Zhang, B. Li, Wenwu Zhu, S. Kung

{"title":"Mobility assisted optimal routing in noninterfering mobile ad hoc networks","authors":"Jihui Zhang, Yunnan Wu, Qian Zhang, B. Li, Wenwu Zhu, S. Kung","doi":"10.1109/IWQOS.2004.1309352","DOIUrl":"https://doi.org/10.1109/IWQOS.2004.1309352","url":null,"abstract":"A mobile wireless network experiences random variations due to node mobility, which may potentially be exploited for more cost-effective communications. The pioneering work by Grossglauser and Tse (2001) first demonstrated that a network under sufficient amount of (random) mobility could provide a larger scaling rate of throughput capacity than a static network, at the cost of significant and potentially unbounded end-to-end delay. Subsequent works have addressed the issue of the capacity gain under bounded delay. In this paper, we take a rather different approach in that we explore node mobility in the search for the optimal packet delivery routes subject to the QoS criteria such as delay and energy consumption. This is obtained by adopting a deterministic model in a noninterfering mobile ad hoc network (MANET). We present polynomial time algorithms for finding these optimal routes. Specifically, in a system without power control capability, where the transmission range of each node is fixed, we seek optimal routes with minimal end-to-end delivery time or lowest total power consumption along the path, respectively. For both formulations, we propose hop-expansion based algorithms that carry out the computations inductively over the number of hops. In a system with power control, we seek the minimum energy route, subject to certain end-to-end delay constraint. For this optimization, we propose a layered algorithm that performs the computations inductively over the discrete time periods.","PeriodicalId":266235,"journal":{"name":"Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004.","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124295033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Backward connection preemption in multiclass QoS-aware networks 多类qos感知网络中的反向连接抢占

Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004. Pub Date : 2004-06-07 DOI: 10.1109/IWQOS.2004.1309372

L. Lei, S. Sampalli

引用次数: 10

Towards a formal model for QoS specification and handling in networks 面向网络中QoS规范和处理的形式化模型

Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004. Pub Date : 2004-06-07 DOI: 10.1109/IWQOS.2004.1309371

Z. Mammeri

引用次数: 9

Where packet traces meet speech samples: an instrumental approach to perceptual QoS evaluation of VoIP 哪里数据包跟踪满足语音样本:一个工具的方法来感知QoS的VoIP评估

Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004. Pub Date : 2004-06-07 DOI: 10.1109/IWQOS.2004.1309393

F. Hammer, P. Reichl, T. Ziegler

{"title":"Where packet traces meet speech samples: an instrumental approach to perceptual QoS evaluation of VoIP","authors":"F. Hammer, P. Reichl, T. Ziegler","doi":"10.1109/IWQOS.2004.1309393","DOIUrl":"https://doi.org/10.1109/IWQOS.2004.1309393","url":null,"abstract":"With the increasing deployment of real-time Internet services, evaluating the user perception of quality of service (QoS) has gained rapidly increasing importance. In the case of Voice over IP (VoIP), the standard approach of listening-only tests for subjectively assessing a limited number of speech samples, which are supposed to be representative for selected network conditions, does in no way reflect the huge variability of packet loss patterns that may originate from the underlying network. Performing tests by employing objective (instrumental) evaluation methods in a live testbed environment is usually extensive and does not deliver reproducible results, moreover the measurement granularity is bounded by the length of the test speech samples. In this paper, we propose a methodology that circumvents these limitations by employing arbitrary packet traces and successively matching the encoded speech sample with all possible trace fragments. This approach allows for continuous perceptual evaluation of VoIP traffic carried over various QoS-enabled transmission technologies. Results based on traces from testbed measurements reflecting different Web-like cross traffic situations for both the G.729 and iLBC codecs validate our approach and allow interesting insights into the dependence of perceived VoIP quality on underlying technological conditions.","PeriodicalId":266235,"journal":{"name":"Twelfth IEEE International Workshop on Quality of Service, 2004. IWQOS 2004.","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121428571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20