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Personal Communications, IEEE

Issue 2 • Date April 1998

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Displaying Results 1 - 10 of 10
  • CordlessTelecommunications Worldwide: The Evolution Of Unlicensed PCs [Book Reviews]

    Publication Year: 1998 , Page(s): 3
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    Freely Available from IEEE
  • Scanning the literature

    Publication Year: 1998 , Page(s): 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (154 KB)  

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  • Paving The Way To Third-Generation Mobile Systems In Europe [Guest Editorial]

    Publication Year: 1998 , Page(s): 5
    Cited by:  Papers (4)
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    Freely Available from IEEE
  • Fixed and adaptive blocking thresholds in CDMA cellular networks

    Publication Year: 1998 , Page(s): 56 - 63
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2228 KB)  

    A number of papers have shown that, in a code-division multiple access cellular network, bursty user mobility causes remarkable negative effects on link availability, and hence on cellular network capacity. This article shows that a possible provision for contrasting such negative effects is the introduction of a blocking threshold which produces an increase in the link availability and a decrease in the dropping probability at the expense of the appearance of a non-null blocking probability. In order to maximize the capacity of the cellular network, the blocking threshold has to be selected so that a proper balancing of the blocking probability, dropping probability, and link availability is achieved. In particular, the article presents a simple self-adaptive mechanism for selecting the blocking threshold, which achieves good performance and has the fundamental advantage of not requiring any a priori knowledge of the system parameters View full abstract»

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  • Requirements of multiregional mobile broadband satellite networks

    Publication Year: 1998 , Page(s): 26 - 30
    Cited by:  Papers (7)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2888 KB)  

    Chiefly as a result of the phenomenal worldwide growth in the use of the Internet, a number of geostationary satellite systems have been proposed for provision of broadband multimedia-type services. The vast majority of these systems address the needs of fixed users; however, satellites can also play an important role in the deployment of mobile networks. This article describes the requirements of a multiregional network of interconnected geostationary satellites capable of providing multimedia-type services to ubiquitous and mobile users View full abstract»

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  • UMTS: a middleware architecture and mobile API approach

    Publication Year: 1998 , Page(s): 32 - 38
    Cited by:  Papers (11)  |  Patents (68)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3536 KB)  

    The ongoing European ACTS project OnTheMove provides support services for distributed mobile multimedia applications. The project defines, implements, and demonstrates a mobile middleware called a Mobile Application Support Environment (MASE) which is based on UMTS concepts. The mobile application programming interface (mobile API) of MASE, which will be submitted for standardization, allows common access to the underlying operating systems and network infrastructure, and facilitates the development of new, mobile-aware, multimedia applications View full abstract»

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  • Estimating coverage of radio transmission into and within buildings at 900, 1800, and 2300 MHz

    Publication Year: 1998 , Page(s): 40 - 47
    Cited by:  Papers (17)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3992 KB)  

    Investigations of propagation into and within buildings at 900, 1800, and 2300 MHz have been undertaken, using buildings both in the University of Liverpool precinct and in the commercial center of the city of Liverpool, United Kingdom. The emphasis of this article is the modeling of radio transmission into buildings that uses the measured penetration loss values in order to adjust the propagation models developed for the outside areas, and the modeling of radio transmission within buildings, starting with the simple distance-power law. Those models are very useful for economical reasons and are sufficiently fast for rapidly estimating coverage regions. However, more accurate models have been developed from experimental results, and are presented. For those more precise models to work properly, it is necessary to know the environment and all the variables that may influence the propagation of the radio signals View full abstract»

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  • Random multiple access of broadcast channels with Pareto distributed packet interarrival times

    Publication Year: 1998 , Page(s): 48 - 55
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2676 KB)  

    We consider the random multiple access of a slotted broadcast communication channel. Packet arrivals for such channels are often modeled as Poisson processes because the latter have attractive theoretical properties and are well understood, even though a number of traffic studies have shown that packet interarrival times are not always exponentially distributed. For example, some studies argue convincingly that traffic from a variety of working packet networks (LANs, WANs, etc.) is much better modeled using statistically self-similar processes to characterize the packet interarrival times of the aggregate traffic, which have much different properties than Poisson processes. Because of the great influence multiple access algorithms (used in the channel access subsystem) will have on the performance of third-generation digital wireless mobile communication systems, we study the problem of random multiple access under packet traffic generated by interactive data applications (e.g., reading/composing short e-mail messages, responding to paging type messages, transferring files between the mobile and a fixed computer, and querying of a database). We examine and demonstrate the performance robustness of the random access algorithms (RAAs) when they are driven by a strongly bursty packet arrival process, commonly found in interactive data applications View full abstract»

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  • FRAMES multiple access for UMTS and IMT-2000

    Publication Year: 1998 , Page(s): 16 - 24
    Cited by:  Papers (47)  |  Patents (25)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4424 KB)  

    This article presents the FRAMES multiple access (FMA) concept designed for third-generation mobile radio systems. The concept consists of two modes, TDMA-based FMA1 and CDMA-based FMA2, which have contributed to the standardization processes of third-generation systems. FMA1 uses the TDMA slot structure where spreading can be applied inside the slot or, alternatively, plain TDMA-type transmission can be used. FMA2 is a single-carrier wideband CDMA solution using a 4.096 Mchips/s basic chip rate. The FMA concept facilitates common upper-layer protocol structure as well as GSM backwards compatibility for evolution from second-generation systems to third-generation mobile radio systems. The defined concept fulfils the UMTS/IMT-2000 requirements in providing the services needed for the next millennium View full abstract»

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  • A flexible network architecture for UMTS

    Publication Year: 1998 , Page(s): 8 - 15
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2876 KB)  

    This article provides an overview of the work undertaken in the ACTS RAINBOW project to develop a flexible radio-independent architecture for UMTS, which will support both existing second-generation radio access and new third-generation radio interface(s). The architecture is developed by decomposing the system into transport-dependent, mobility-dependent, and service-dependent components View full abstract»

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This Magazine ceased publication in 2001. The current retitled publication is IEEE Wireless Communications.

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