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Third International Conference on 3G Mobile Communication Technologies

8-10 May 2002

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Displaying Results 1 - 25 of 112
  • A novel channel estimation algorithm applied to UTRA-FDD

    Publication Year: 2002, Page(s):267 - 271
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (414 KB)

    Channel estimation is a key step in the initial synchronisation of a RAKE receiver. In this paper we present an algorithm for multipath channel estimation based on an elegant and efficient new technique for resolving the multipath components. The performance of the algorithm is assessed through simulation as part of a RAKE receiver in a fully compliant UTRA-FDD uplink scenario. Test results are pr... View full abstract»

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  • Adaptive mapping and priority assignment for OFDM

    Publication Year: 2002, Page(s):495 - 499
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (761 KB)

    The limited bandwidth and its poor quality presents a significant challenge for wireless multimedia. Fortunately, the flexibility of OFDM modulation offers a number of possibilities to alleviate this problem. We analyse two possibilities and their interaction. In order to assign the available capacity efficiently, the paper considers an arrangement that allows adaptation of the mapping method for ... View full abstract»

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  • Performance improvement for real-time video communications by link adaptation in E-GPRS networks

    Publication Year: 2002, Page(s):489 - 494
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (557 KB)

    The provision of video communications over wireless links is a challenging task due to the poor performance of video compression algorithms in time-varying error-prone environments. The paper presents a performance enhancement method for real-time video communications by employing link adaptation in enhanced general packet radio service (E-GPRS) cellular networks. A novel link adaptation algorithm... View full abstract»

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  • A dynamic programming algorithm for downlink throughput optimisation in wideband CDMA systems

    Publication Year: 2002, Page(s):484 - 488
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (391 KB)

    The paper develops an approach for the maximisation of throughput in the downlink of third generation mobile systems, based on wideband CDMA. A mathematical model is outlined for a multi-service multiplexed environment, with constraints placed on the system, based on the class of service. The optimisation problem is stated in terms of the model parameters and adapted for use with a dynamic program... View full abstract»

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  • Downlink shared channel: an effective way for delivering Internet services in UMTS

    Publication Year: 2002, Page(s):479 - 483
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (552 KB)

    The paper examines the utilisation of downlink shared channel (DSCH) as an efficient way of providing Web services in UMTS. First, it establishes its superiority in terms of delay performance against two alternative dedicated delivery schemes, and then it examines what modifications should be done to one of the dedicated schemes in order to match the DSCH performance. Next, it continues with a det... View full abstract»

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  • 3G in a co-operative network environment

    Publication Year: 2002, Page(s):439 - 443
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (550 KB)

    This paper introduces the concept of co-operative networks. It looks mainly at the co-operation between 3G and broadcast networks and 3G and W-LAN networks as possible early scenarios for what are considered as 'beyond 3G' networks. The commercial drivers for considering such systems are discussed. Some possible scenarios for each type of co-operation are overviewed. The paper concludes with a loo... View full abstract»

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  • 3G interworking with wireless LANs

    Publication Year: 2002, Page(s):394 - 399
    Cited by:  Papers (4)  |  Patents (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (646 KB)

    Recently, the use of wireless LANs (WLAN) as a complementary technology to 3G systems has been identified. WLANs can be used to supplement the available bandwidth and capacity of a 3G network in hotspot areas, such as railway stations and airports, without sacrificing the capacity provided to cellular users. It provides support for data intensive applications and enables smooth on-line access to c... View full abstract»

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  • Controlling reconfiguration

    Publication Year: 2002, Page(s):474 - 478
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (625 KB)

    SDR technology is expected, eventually, to offer complete programmability and reconfigurability to both multimode and multi-functional communication terminals and network nodes. Any of these reconfigurable nodes will then have, intrinsically, the ability to accommodate innumerable configurations enabling access to both terrestrial and satellite communication networks. These configurations will be ... View full abstract»

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  • 3G and beyond - the applications generation

    Publication Year: 2002, Page(s):433 - 438
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (668 KB)

    This paper examines the drivers for the deployment of 3G networks and outlines the applications that will utilise broadband access from mobile terminals. The challenges presented within the telecoms industry and developments in the supporting technologies surrounding the delivery of mobile broadband services are described. Finally, an overview of the applications currently being delivered on early... View full abstract»

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  • Redefining user input on handheld devices

    Publication Year: 2002, Page(s):388 - 393
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (662 KB)

    In migrating users to 3G applications, developers, device manufacturers and network operators are asking the public to believe in the wireless Internet. While improvements have been made in many areas, we believe that the user input methods are a remaining inhibitor. Devices have continued to get smaller, while at the same time require more functionality. We present a technology called the Fastap ... View full abstract»

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  • The effect of electrical and mechanical antenna down-tilting in UMTS networks

    Publication Year: 2002, Page(s):86 - 90
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (607 KB)

    In an interference-limited CDMA system, network planning and the optimal installation of infrastructure components are important issues. This is not only to increase system capacity but also to allow for a smooth network operation. Whereas the Node B locations can hardly be changed, modern antennas provide adaptation mechanisms with which the antenna down-tilt angle can be adapted to the various n... View full abstract»

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  • Optimization of a multi-dwell implementation of the cell-search in WCDMA

    Publication Year: 2002, Page(s):261 - 266
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (718 KB)

    This paper provides an analytical approach for optimization of an adaptive multi-dwell cell-search procedure in UMTS-based W-CDMA systems. This optimization is against the critical measures in cell acquisition, such as "overall acquisition time" and "the probability of false lock". Also, other key system design issues such as power consumption, the required memory, and the implementation complexit... View full abstract»

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  • An open architecture mechanism for control of dynamic processing resources

    Publication Year: 2002, Page(s):469 - 473
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (669 KB)

    The present need for high data rate communication applications and freedom to communicate from anywhere at any time demands more and more from digital processing hardware. The concept of software defined radio and reconfigurable networks requires many new mechanisms and subsystems to allow the implementation of such networks. The paper presents a solution to the problem of managing the configurati... View full abstract»

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  • Europe's first 3G network: a case study in design and implementation

    Publication Year: 2002, Page(s):1 - 4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (416 KB)

    This paper outlines the work undertaken in the design and implementation of a 3rd generation mobile telephone network in the Isle of Man. From the very beginning the Manx Telecom 3G project adopted an applications-centric design philosophy. That is, all design and planning decisions were based on consideration of the desired end user experience, considering network quality, service coverage and pe... View full abstract»

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  • Optimization of sectorized antenna beam patterns for CDMA2000 systems

    Publication Year: 2002, Page(s):428 - 432
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (425 KB)

    To optimize antenna beam patterns of 3 and 6-sectors configuration in a cdma2000 system is studied. Increasing the number of sectors in a CDMA system has been seen as the useful mean of increasing the capacity of cell sites. However, in a real CDMA networks, 6-sectors deployments have typically failed to obtain the expected gains due to the complex RF environments. Recently, 6-sectors system is de... View full abstract»

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  • Comparison of charging methods in 3G mobile networks (consumer behaviour versus tariff models)

    Publication Year: 2002, Page(s):382 - 387
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1004 KB)

    The paper describes an approach to analyse various charging mechanisms according to consumer behaviour, service types and tariff models in third generation (3G) mobile networks. In the area of charging for mobile networks, much work has been done to create proprietary billing solutions to address the problems of optimal allocation of network resources and bandwidth control. However, the sophistica... View full abstract»

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  • The coexistence of WCDMA macrocell and microcell radio network layers

    Publication Year: 2002, Page(s):81 - 85
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1029 KB)

    The introduction of a WCDMA microcell layer has implications upon inter-operator coexistence. Coexistence has been studied extensively throughout 3GPP standardisation to help ensure the appropriate specification of adjacent channel performance. The majority of 3GPP studies have been based upon theoretical radio network plans with regular street and building layouts. The paper provides an analysis ... View full abstract»

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  • Adaptive admission control for granted speech user QoS in a WCDMA mixed services scenario

    Publication Year: 2002, Page(s):239 - 243
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (582 KB)

    In this study two adaptive admission control algorithms are proposed. They aim at offering the negotiated quality of service (QoS) in downlink, at least to a fixed percentage of real time users, by acting on admission control (AC) parameters. Simulation results, obtained in a mixed real time and non real time users scenario, confirm the effectiveness of the algorithms in recovering from critical Q... View full abstract»

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  • IP header and signalling compression for 3G systems

    Publication Year: 2002, Page(s):102 - 106
    Cited by:  Papers (4)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (603 KB)

    IP header compression techniques have evolved to meet the challenges of cellular networks. The scope has also broadened. Solutions are being developed for voice traffic transport, SIP and protocols such as TCP, which covers the major traffic volumes. All of these standards are currently under development in accordance with the working group charter and IETT process. With these solutions, 2.5G and ... View full abstract»

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  • Admission control for different UE-MAC algorithms in UTRA-FDD

    Publication Year: 2002, Page(s):256 - 260
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (710 KB)

    Radio Resource Management (RRM) entity is responsible for the utilization of the air interface resources in UTRA-FDD and, consequently, the adoption of efficient RRM algorithms is needed to guarantee QoS as well as to provide high capacity. Among the several RRM functions that will help to achieve such objectives, this paper proposes three different MAC strategies applied at UE (User Equipment) le... View full abstract»

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  • Calibration of a radio network simulation tool for UMTS

    Publication Year: 2002, Page(s):529 - 533
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (765 KB)

    As power is the resource shared on both UMTS uplink and downlink, a simulation-based approach must be adopted more closely to estimate the users' perceived quality of service. Previous work at the University of Bristol (Vernon (2001)) has proposed a Web-enabled distributed approach to UMTS radio network planning. Software written in the Java programming language is run on multiple Web browsers; us... View full abstract»

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  • A software radio view of modulation and spreading for UTRA FDD and UTRA TDD

    Publication Year: 2002, Page(s):464 - 468
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (603 KB)

    We present a unified view of modulation and spreading for both UTRA FDD and UTRA TDD in the digital baseband. Particular aspects such as monocode and multicode transmission, symbol mapping for uplink and downlink as well as spreading and despreading are discussed in detail. Parameterized software radio is employed to realize all necessary layer 1 signal processing blocks. We develop a systematic v... View full abstract»

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  • Capacity benefits of GPRS coding schemes CS-3 and CS-4

    Publication Year: 2002, Page(s):287 - 291
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (526 KB)

    In this paper, the system level performance of deploying GPRS coding schemes CS-1 to CS-4 is evaluated against that of deploying only the two lower data rate schemes, CS-1 and CS-2. In this manner, the substantial benefits of deploying all four coding schemes are demonstrated. The evaluation is performed using both link level performance statistics and a simulator that is specifically designed to ... View full abstract»

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  • Enabling network redundancy in the radio access network

    Publication Year: 2002, Page(s):27 - 31
    Cited by:  Papers (1)  |  Patents (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (596 KB)

    In the current UTRAN (UMTS terrestrial radio access network) architecture, redundancy is one of the major issues, usually provided by means of robust network elements with high reliability and protection switching in the transport network. When the radio access network evolves to a more distributed architecture, the functions of the RNC (radio network controller) are split according to control and... View full abstract»

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  • Performance of network-based mobile location techniques within the 3GPP UTRA TDD standards

    Publication Year: 2002, Page(s):334 - 339
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (829 KB)

    As part of the ongoing 3GPP standardisation activities for third generation mobile systems, the need to meet the FCC E911 Phase II regulations was anticipated and system features were designed accordingly. This paper describes the features that were incorporated into the UTRA TDD standards (both the 3.84 MHz and 1.28 MHz variants) to this end. Whilst the solutions adopted for user equipment (UE) p... View full abstract»

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