2004 IEE Telecommunications Quality of Services: The Business of Success QoS 2004

2-3 March 2004

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Displaying Results 1 - 25 of 38
  • A legacy of echo and silence

    Publication Year: 2004, Page(s):109 - 113
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (285 KB)

    The paper discusses voice transmission quality issues relating to interworking between VoIP and PSTN "legacy" networks. The evolution of voice quality with technological progress in the PSTN from its inception to the present day VoIP systems is described and this sets the scene for discussion of echo control and silence removal in case study examples. View full abstract»

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  • Speech intelligibility of VoIP to PSTN interworking - a key index for the QoS

    Publication Year: 2004, Page(s):104 - 108
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (331 KB)

    Intelligibility is an important concern of speech transmission channels. The paper addresses speech intelligibility issues in the VoIP to PSTN interworking context, discusses the complexity of quantifying speech intelligibility, and advocates speech based objective assessments. The limitations of mean opinion score (MOS) centred quality indices are discussed. A dedicated intelligibility index seem... View full abstract»

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  • A new VoIP adaptive playout algorithm

    Publication Year: 2004, Page(s):99 - 103
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (224 KB)

    A novel playout algorithm for VoIP applications is presented. The playout times of voice packets are calculated using adaptive estimation of network delays. In contrast to previous solutions, the weighting factor that controls the estimation process is dynamically adjusted according to the observed delay variations. This results in higher-quality estimates of network delays. With this algorithm, t... View full abstract»

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  • User quality of service perception in 3G mobile networks

    Publication Year: 2004, Page(s):64 - 69
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (370 KB)

    UMTS reflects the latest technical and standardisation efforts to realise and deploy a QoS-enabled mobile network infrastructure that can support QoS-dependent services and applications. The next challenge, therefore, is how to use and configure the network efficiently in a way which meets user expectation while conserving network resources. In order to achieve that, it is important to have qualit... View full abstract»

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  • IPCablecom as transport platform for interactive multimedia services in cable TV networks

    Publication Year: 2004, Page(s):94 - 98
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (346 KB)

    With the introduction of cable communication systems such as DOCSIS or Euro-DOCSIS and enhancements by end-to-end platforms like IPCablecom, it became possible to transmit time-critical, IP based, multimedia services across cable TV networks. The paper introduces an architecture that exploits the functionality of IPCablecom as a transport platform, integrating it into the service environment defin... View full abstract»

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  • Authors List

    Publication Year: 2004, Page(s): 0_8
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (24 KB)

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    Publication Year: 2004, Page(s): 0_2
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (10 KB)

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  • Using macro level mobility models to evaluate QoS routing performance in a mobile core network

    Publication Year: 2004, Page(s):59 - 63
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (309 KB)

    Many studies have been performed into the benefits of QoS routing, but these concentrate on the fixed network case and do not take into account the effects of subscriber mobility on the traffic patterns and resulting QoS. We show the benefits of modelling mobility when investigating the performance of QoS routing algorithms. View full abstract»

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  • Integrated algorithm of HMIPv6 & MPLS for ns to support next generation wireless networks

    Publication Year: 2004, Page(s):156 - 159
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (237 KB)

    The paper highlights the advantages of HMIPv6 (hierarchical Mobile IPv6) and MPLS integration in the aspect of guaranteed and efficient end-to-end QoS provision in multi-domain wireless networks. The multiple domain scenario of radio access networks is considered and we focus on traffic transmission from/to a mobile host (MH) and a correspondent node (CN). Agent advertisement, MH registration, lab... View full abstract»

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  • Improvement of voice qualities and network coverage for GSM handsets

    Publication Year: 2004, Page(s):146 - 150
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (334 KB)

    Global system for mobile communication (GSM) is a second-generation system and the world's first mobile system to specify digital modulation and network level architectures and services. The paper represents improvements obtained from analysis of the GSM communication network, architecture of the specialized environment, and descriptions of GSM handset voice qualities and coverage areas. The way t... View full abstract»

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  • Traffic dimensioning for GSM-over-IP services

    Publication Year: 2004, Page(s):136 - 140
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (324 KB)

    The cost of the link connecting the backbone network and customer premises has a major effect on the uptake of IP-based wireless office technology. The paper describes the factors influencing the dimensioning of this link, by taking into consideration a system which uses the IP network in order to deliver voice and signalling to a GSM radio access system. Through simulation, it is shown that disco... View full abstract»

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  • New QoS metrics and application layer proxy for GPRS/UMTS Internet access

    Publication Year: 2004, Page(s):180 - 184
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (322 KB)

    Despite the fact that the third generation (3G) mobile system is expected to provide a wide range of services, including data access, it has been designed primarily for voice services and it provides QoS guarantee in terms of bit rate and delay. These QoS metrics are more suitable for a real time streaming service rather than the dominant data service in the Internet. The paper proposes new QoS me... View full abstract»

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  • Improving the quality of service in dead spots areas of UMTS networks

    Publication Year: 2004, Page(s):127 - 131
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (252 KB)

    Providing 100% reliable radio coverage within their service area is a very challenging task for mobile operators. This is especially true in areas that experience abnormal attenuation to radio frequency (RF), due to natural features or man-made structures. The signal quality in these areas needs to be improved by enhancing the weak RF signal. Building a new base station (BS) is the best solution. ... View full abstract»

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  • IP network performance and QoS: signaling and interworking issues

    Publication Year: 2004, Page(s):86 - 93
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (1152 KB)

    In 2000, the IAB's RFC 2990, "Next Steps for the IP QoS Architecture", compared IntServ and DiffServ style networks and considered broader architectural approaches/requirements, including: critical "gaps" in routing; resource management; monitoring and accounting; application and service development; incremental, heterogeneous deployment. Therefore, what is needed is "a set of QoS mechanisms and a... View full abstract»

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  • Contents

    Publication Year: 2004, Page(s):0_5 - 0_7
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (77 KB)

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  • Analysis of a quality of service algorithm for wide-area private mobile radio systems

    Publication Year: 2004, Page(s):171 - 174
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (256 KB)

    The paper concerns the analysis of an algorithm used for assigning frequencies to non-cellular non-trunked private mobile radio (PMR) systems. The PMR assignment algorithm was first put forward by D.F. Bacon (see Proc. IEE Conf. on Getting the Most Out of the Radio Spectrum, 2002). The authors have applied this algorithm to practical data and analysed the resulting radio spectrum into which the pr... View full abstract»

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  • Telecommunications Quality of Service: The Business of Success (QoS 2004)

    Publication Year: 2004
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (35 KB)

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  • QoS attributes for packet switched services in 3rd generation mobile systems (UMTS)

    Publication Year: 2004, Page(s):52 - 58
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (378 KB)

    The third generation of mobile systems (UMTS) is intended to provide different end user data applications based on packet switched services. In order to meet end users' expectations and to overcome the limitation of system resources and the air interface capacity, it is necessary to define quality of service (QoS) attributes properly. We give an overview of UMTS services, list QoS attributes used ... View full abstract»

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  • A MIP-SIP macro-mobility management scheme for VoIP across wired and wireless domains

    Publication Year: 2004, Page(s):114 - 118
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (311 KB)

    With the convergence of the Internet and cellular networks, voice-over-IP (VoIP) applications across wired and wireless domains are of increasing importance. Two major mobility management protocols, Mobile IP (MIP) and session initiation protocol (SIP), have been proposed to handle macro-mobility in the network layer and the application layer respectively, either independently or jointly for diffe... View full abstract»

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  • QoS of multiparty videoconference over geostationary satellites

    Publication Year: 2004, Page(s):70 - 73
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (236 KB)

    Multimedia applications have stringent requirements, including throughput and temporal requirements, in their performance objectives. Geostationary (GEO) satellite links are increasingly being used to transport IP-based network services, especially to reach remote regions where it is expensive or impractical for terrestrial networks. The paper presents research work carried out in the ICEBERGS Pro... View full abstract»

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  • The IEE Telecommunications Quality of Service: the busniess of success (QoS 2004)

    Publication Year: 2004, Page(s): 0_3
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (15 KB)

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  • Control theory approach for implementation of dynamic pricing in mobile cellular networks

    Publication Year: 2004, Page(s):160 - 164
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (283 KB)

    Accurate forecasting of future demand for cellular services is essential, as, due to the high infrastructure implementation costs involved, overestimation of demand could be very costly. In addition, the difference between peak and off-peak demand for wireless services can be very significant, both temporally and spatially, and gearing the network to meet peak demand would result in under-utilised... View full abstract»

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  • So you think you can measure IP QoS?

    Publication Year: 2004, Page(s):151 - 155
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (290 KB)

    For broadband networking to be a commercial success, operators need to provide differentiated levels of quality of service (QoS). Networks are shared infrastructures of buffering and bandwidth resources, and are designed to bound the delays and losses inherent in packet queueing technology. But can customers be sure they are getting the QoS they are paying for? It is thought that active probing gi... View full abstract»

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  • Quality of service in TCP/IP networks: a DiffServ testbed

    Publication Year: 2004, Page(s):141 - 145
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (320 KB)

    An implementation of the weighted fair queue algorithm on a Pentium/Windows 2000 platform is presented with preliminary test results. This is part of a DiffServ testbed being developed at the University of Greenwich for evaluating various design options relating to the provision of quality of service over the Internet. The present implementation includes: (a) a packet classifier which assigns inco... View full abstract»

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    Publication Year: 2004, Page(s): 185
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