Fourth European Conference on Universal Multiservice Networks (ECUMN'07)最新文献_第4页

Can Scheduling with Error Rate Consideration Support TCP Performance Comparable to Packet Combining HARQ in Evolved UTRA and UTRAN Networks? 在改进的UTRA和UTRAN网络中，考虑错误率的调度是否能支持TCP性能与分组组合HARQ相当?

Fourth European Conference on Universal Multiservice Networks (ECUMN'07) Pub Date : 2007-02-14 DOI: 10.1109/ECUMN.2007.9

Yan Zhang, M. Uchida, M. Tsuru, Y. Oie

{"title":"Can Scheduling with Error Rate Consideration Support TCP Performance Comparable to Packet Combining HARQ in Evolved UTRA and UTRAN Networks?","authors":"Yan Zhang, M. Uchida, M. Tsuru, Y. Oie","doi":"10.1109/ECUMN.2007.9","DOIUrl":"https://doi.org/10.1109/ECUMN.2007.9","url":null,"abstract":"As a key technology of evolved UTRA and UTRAN, hybrid ARQ with packet combining (HARQ with PC) can effectively improve the throughput performance for poor channel condition users without doing unacceptable level of harm to the system transmission efficiency or the throughput performance of good condition users. In the present study, we attempt to apply scheduling with error rate consideration as an alternative method by which to realize a comparable TCP performance to HARQ with PC. Scheduling with error rate consideration introduces the transmission failure possibility (error rate) in order to modify the existing channel-aware scheduling schemes to avoid high-risk transmissions, and thus improves TCP performance. Simulations show that scheduling with error rate consideration can realize a TCP performance comparable to HARQ with PC when no user continuously experiences a nearly zero successful transmission possibility environment. Moreover, it is shown herein that a synergistic improvement can be achieved by applying scheduling with error rate consideration to HARQ with PC","PeriodicalId":202819,"journal":{"name":"Fourth European Conference on Universal Multiservice Networks (ECUMN'07)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114881606","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: 2

Admission Control for Non-preprovisioned Service Flow in Wireless Metropolitan Area Networks 无线城域网中非预置业务流的准入控制

Fourth European Conference on Universal Multiservice Networks (ECUMN'07) Pub Date : 2007-02-14 DOI: 10.1109/ECUMN.2007.5

Liping Wang, Fuqiang Liu, Yusheng Ji, N. Ruangchaijatupon

引用次数: 61

Scalable Mobile Multimedia Group Conferencing Based on SIP Initiated SSM 基于SIP发起SSM的可扩展移动多媒体组会议

Fourth European Conference on Universal Multiservice Networks (ECUMN'07) Pub Date : 2007-02-14 DOI: 10.1109/ECUMN.2007.46

T. Schmidt, Matthias Wählisch, H. Cycon, M. Palkow

{"title":"Scalable Mobile Multimedia Group Conferencing Based on SIP Initiated SSM","authors":"T. Schmidt, Matthias Wählisch, H. Cycon, M. Palkow","doi":"10.1109/ECUMN.2007.46","DOIUrl":"https://doi.org/10.1109/ECUMN.2007.46","url":null,"abstract":"Multimedia group communication emerges to focal interest at mobile devices, enriching voice or video conferencing and complex collaborative environments. The Internet uniquely provides the benefit of scalable, dynamic group communication services, vitally aiding commonly limited mobile terminals. The traditional Internet approach of any source multicast (ASM) routing, though, remains hesitant to spread beyond limited, controlled environments. It is widely believed that simpler and more selective mechanisms for group distribution in source specific multicast (SSM) will globally disseminate to many users of multicast infrastructure and services. Mobility management for the recent SSM standard is under debate - SSM group session initiation up until now remains unsupported by the session initiation protocol (SIP). In this paper we present straight forward extensions to SIP for negotiating SSM sessions. SIP protocol specifications and semantic are compatibly extended without adding new SIP methods. We will introduce a multimedia communication software with distributed architecture as implementation reference. Furthermore mobility management of the underlying routing layer is discussed and evaluated on grounds of real-world Internet topologies","PeriodicalId":202819,"journal":{"name":"Fourth European Conference on Universal Multiservice Networks (ECUMN'07)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132229467","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: 6

Session Layer Resurgence: Towards Mobile, Disconnection- and Delay-Tolerant Communication 会话层的复兴:走向移动，断开和延迟容忍通信

Fourth European Conference on Universal Multiservice Networks (ECUMN'07) Pub Date : 2007-02-14 DOI: 10.1109/ECUMN.2007.47

Y. Ismailov, Karl Palmskog, M. Widell, Petter Arvidsson, Yaoshuang Wang

引用次数: 3

Improved User Identity Confidentiality for UMTS Mobile Networks 改进UMTS移动网络的用户身份保密性

Fourth European Conference on Universal Multiservice Networks (ECUMN'07) Pub Date : 2007-02-14 DOI: 10.1109/ECUMN.2007.27

Behnam Sattarzadeh, Mahdi Asadpour, R. Jalili

引用次数: 17

MBAC Robustness to Traffic Variations: A Simulation Study MBAC对交通变化的鲁棒性:仿真研究

Fourth European Conference on Universal Multiservice Networks (ECUMN'07) Pub Date : 2007-02-14 DOI: 10.1109/ECUMN.2007.32

Anne Nevin, Yuming Jiang, P. Emstad

{"title":"MBAC Robustness to Traffic Variations: A Simulation Study","authors":"Anne Nevin, Yuming Jiang, P. Emstad","doi":"10.1109/ECUMN.2007.32","DOIUrl":"https://doi.org/10.1109/ECUMN.2007.32","url":null,"abstract":"Measurement based admission control (MBAC) has long been recognized as the best method for providing stochastic service guarantees. Since MBAC relies on measurements, the actual performance of MBAC can only be established through simulations or on real networks. There are two main performance measures: 1) how well the MBAC can actually meet the QoS target specified by a flow; and 2) how well the MBAC can utilize the network resources. The main work in the literature has mostly been on finding optimal MBAC algorithms that increase network utilization. In this simulation study we focus on an MBAC's ability to meet the QoS target under variations in the number of flow attempts within an interval and variations inflow lifetimes. We introduce an ideal admission controller based on analytical values and show the importance of using this ideal when assessing the performance of an MBAC. Most MBAC algorithms rely on tuning parameters to help in the decision making. Tuning these parameters is a difficult task, and a setting that gives excellent performance under one scenario, may give a very pessimistic or too optimistic performance in another scenario. We show that by adding two policies, the so called pessimistic policy together with a back-off policy, the reliance on tuning parameters diminishes. With these two policies in place we show that an MBAC can perform close to the ideal admission controller under various traffic loads without relying on explicit tuning parameters","PeriodicalId":202819,"journal":{"name":"Fourth European Conference on Universal Multiservice Networks (ECUMN'07)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129941397","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

On the Performance of Safety Message Dissemination in Vehicular Ad Hoc Networks 车载Ad Hoc网络安全信息传播性能研究

Fourth European Conference on Universal Multiservice Networks (ECUMN'07) Pub Date : 2007-02-14 DOI: 10.1109/ECUMN.2007.39

S. Yousefi, S. Bastani, M. Fathy

{"title":"On the Performance of Safety Message Dissemination in Vehicular Ad Hoc Networks","authors":"S. Yousefi, S. Bastani, M. Fathy","doi":"10.1109/ECUMN.2007.39","DOIUrl":"https://doi.org/10.1109/ECUMN.2007.39","url":null,"abstract":"One of the most promising and critical application of vehicular ad hoc networks (VANETs) is improvement of the road traffic safety. Currently there is a growing belief that putting an 802.11-like radio into road vehicles could help the drivers to travel more safely. Although research in this field is in preliminary stage, some simple implementations are quite promising; to the best of our knowledge there is no comprehensive feasibility study in the literature. So, as a first step, in this paper we investigate the feasibility of beacon safety message dissemination in VANETs through extensive simulation study. Vehicles are supposed to issue these massages periodically to announce other vehicles about their current situation and use received messages for preventing possible unsafe situations. We evaluate the performance of some simple protocols by the means of quality of service (QoS) metrics like delivery rate and delay and take special attention to reliability and fairness requirements of safety applications. Our results show in spite of global interest, safety applications in VANETs encounter severe challenges which should be addressed properly in the future research. We believe that to become a reality, this issue needs much more research, industry and government support","PeriodicalId":202819,"journal":{"name":"Fourth European Conference on Universal Multiservice Networks (ECUMN'07)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126122693","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: 40

Introducing Semantic Technologies in Web Services-Based Application Discovery within Grid Environments 在网格环境中基于Web服务的应用程序发现中引入语义技术

Fourth European Conference on Universal Multiservice Networks (ECUMN'07) Pub Date : 2007-02-14 DOI: 10.1109/ECUMN.2007.30

S. Pastore

{"title":"Introducing Semantic Technologies in Web Services-Based Application Discovery within Grid Environments","authors":"S. Pastore","doi":"10.1109/ECUMN.2007.30","DOIUrl":"https://doi.org/10.1109/ECUMN.2007.30","url":null,"abstract":"Service discovery is an essential critical element in large scale, open distributed systems. Its implementation is a key functionality of the distributed underlying infrastructures of both Web services frameworks and grid systems where searching and finding services are one of the main tasks. In the framework of sharing grid software resources, different discovery mechanisms have been evaluated. Grid solutions have been considered, together with industry-initiated methods, but the main hurdle for all methods is a lack of automation. In dealing with such WSDL-based services, the paper outlines the different methods in terms of the information model and searching tools. Moreover, to enable automation, it proposes an approach to introducing semantic technologies on the discovery process. Analyzing a Web service process and its actors, semantics could be added to the interactions between provider and client or directly to the broker. The former solution moves towards enriching Web service description by means of semantic languages. The second requires the modification of the broker responsible for the matching user requirements with the service capabilities offered by introducing new modules","PeriodicalId":202819,"journal":{"name":"Fourth European Conference on Universal Multiservice Networks (ECUMN'07)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130490578","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

A Framework to Support QoS for Multimedia Applications in IEEE 802.11 Wireless LAN 一种支持IEEE 802.11无线局域网中多媒体应用QoS的框架

Fourth European Conference on Universal Multiservice Networks (ECUMN'07) Pub Date : 2007-02-14 DOI: 10.1109/ECUMN.2007.1

A. Palmieri, F. Sigona

引用次数: 2

Utility-Based Bandwidth Allocation for Triple-Play Services 基于效用的三播业务带宽分配

Fourth European Conference on Universal Multiservice Networks (ECUMN'07) Pub Date : 2007-02-14 DOI: 10.1109/ECUMN.2007.58

Changbin Liu, Lei Shi, B. Liu

{"title":"Utility-Based Bandwidth Allocation for Triple-Play Services","authors":"Changbin Liu, Lei Shi, B. Liu","doi":"10.1109/ECUMN.2007.58","DOIUrl":"https://doi.org/10.1109/ECUMN.2007.58","url":null,"abstract":"It is expected that, in near future, the multi-class traffic previously in public switched telephone network (PSTN), cable television network and IP network will be multiplexed at backbone and carried by the converged next-generation network (NGN). A pragmatic challenge in facilitating NGN is how to schedule traffic and allocate bandwidth among the triple-play services, namely voice (VoIP), video (IPTV) and data. Different from traditional strict-priority based scheduling intensively used in industry, in this paper, we try to discuss this issue from the objective of network utility maximization (NUM). We first investigate the characteristics of most existing traffic classes and explicitly formulate their utilities to be the function of occupied bandwidth. After that, a novel scheduling scheme to achieve NUM is derived using Lagrange method with KKT conditions. Numerical results under two network scenarios are calculated. Both of them reveal the unique nature of this scheduling, compared with strict-priority scheduling, still highest priority is provided for VoIP traffic, however, no strict priority should be given to IPTV traffic since it will conflict with NUM objective. We hope our results will shed lights on the evolvement towards the converged network","PeriodicalId":202819,"journal":{"name":"Fourth European Conference on Universal Multiservice Networks (ECUMN'07)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115057390","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: 49