OK REVIE EDITED BY S E S H A D R I MOHAN
first part provides an overview and disWireless Communication: The cussion of wireless (data) systems in lnterach’ve Multimedia CD-ROM Germany, evolution of systems, and Edi*or-in-Chie~Jean-Paul M.G.linnadz/ spectrum allocations for mobile ser-
Baltzer Science Publishers, Amsterdam,
I997 REVIEWEDBY YI-BINGLIN Recently, the world has witnessed explosive growth in the use of wireless communications. The number of wireless services and subscribers has greatly expanded. Systems for mobile analog and digital cellular telephony, radio paging, and cordless telephony have become commonplace. Next-generation systems will provide enhanced communication services, such as data, electronic mail, full-motion digital video, or interactive multimedia communications. The development of such a system is a technical challenge, with many issues to be resolved. Wireless Communication: The Interactive Multimedia CD-ROM is a n electronic multimedia book intended to introduce the readers to the subject of wireless communications. This CD-ROM is updated and extended regularly, based on submissions and solicited contributions from experts in the field. Each edition includes the full contents of the previous issues. The current issue contains about 380 hypertext pages of information about wireless and mobile communication systems, enhanced by over 500 images, about 65 audio files, five short video movies, 20 Acrobat printable documents, and five Java animated phasor diagrams. In the 1998 edition video will be extended substantially, quizzes and interactive exercises will be added, and JavaScript “dedicated calculators” will allow the user to execute mathematical formulas, such as link budgets, fade durations, and Erlang B. The contents of Wireless Communication: The Interactive Multimedia CDROM are divided into t h e following chapters: Summary of Network Concepts and Standards * Business and Regulatory Aspects Wireless Channels and Mobile Propagation Cellular Telephone Networks Analog and Digital Transmission Wireless Data Networks e Capita Selecta Slide Shows Further reading (Postscript and Acrobat files) Computer programs The network concepts and standards chapter consists of several parts. The 0
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vices. T h e second part provides an introduction to cellular telephony in both GSM (radio standard, business aspects, network) and U S . cellular telephony (analog AMPS, digital IS 54, and 1s 95), and PCS cordless telephony, including digital enhanced cordless telephone (DECT). The third part overviews
This CD-ROM is updated and exfended regular&, based on submissions and sokited confribufions fi0m eXpet‘fS in fhe field. Each edition includes fhe
full COnfenfS O f fhe PreViOUS issues broadcast systems and standards, including radio data systems (RDSIRBDS), digital audio broadcasting (DAB), digital video broadcasting (DVB /DTTB), and MVDS. The fourth part discusses data and multimedia systems, including mobile (macrocellular) data networks such as CDPD, wireless data systems in Germany, paging, and wireless computing. Other issues covered in this chapter include wireless LANs and ISM bands, HIPERLAN, U.C. Berkeley Infopad (broadband CDMA design), digital short-range communication (DSRC) packet radio, IMT 2000 (FLPMTS), satellite systems (IRIDIUM and VSAT), wireless infrared, road transportation informatics, and communication for IVHS and AVCS. The business and regulatory aspects chapter deals with the technical issues in wireless communication, the problem of user mobility history, evolution of systems toward PCS, economy of wireless access (such as the last mile access issue, the cost of cellular phones and cellular telephony, the market value of the radio spectrum). Then the chapter provides an example of tariffing in GSM and offers success factors of innovations in information services. The wireless channels and mobile propagation chapter first discusses large- and small-scale propagation mechanisms (including path loss propagation models, free space loss, plane earth loss, ground reflections, diffraction, shadowing, and joint effect of multiple interferers), fading issues (such as
multipath fading, Rician and Rayleigh fading, and Nakagami fading), Doppler spectrum, rate of fading, random FM threshold crossing rate (TCR) and average fade duration (AFD), delay spread and coherence bandwidth, scatter function, and samples of typical Rayleigh channels. Then the chapter deals with the channel models, including macrocellular, microcellular, indoor at 2.4 GHz and 60 GHz, infrared vehicle-tovehicle, antenna gain, and reciprocity of uplink and downlink. The cellular telephone networks (wireless access system) chapter deals with radio resource management issues such as cellular frequency reuse, cell sizes planning, multiple access (including FDMA, TDMA, and CDMA), cell sectorization, reuse partitioning, digital speech interpolation (DSI), and fixed and dynamic channel allocation. Handover (including soft handover) is also covered here. The chapter also provides network performance analysis such as link aualitv performance evaluation, modeliAg ceililar radio link quality to study performance issues such as cumulation of interference, Nakagami fading, manmade noise, speech clipping, subjective speech quality, and outage probability. Computer methods (programs) are also attached for the reader’s benefit. Trade-offs for spectrum efficiency and performance are also discussed. The analog and digital transmission chapter overs topics such as effects of fading and dispersion (for analog and digital), modulation methods (e.g., BPSK, DQPSK, FSK, GMSK, QAM), bit error rates (in very slowly fading channels and cellular networks), multicarrier modulation and OFDM, the principles of spread spectrum (frequency hopping, direct sequence and multicarrier CDMA), wideband channel models (including resolvable paths, multipath self-interference, direct sequence transmission, selection of spreading codes, synchronization acquisition and tracking, RAKE receiver, and power control), and diversity techniques (e.g., selection diversity, equal gain combining, maximum ratio combining). The wireless data networks chapter focuses on wireless data access issues. The chapter discusses random access methods and principles. Several systems are introduced: ALOHA (issues such as throughput, drift of backlog, stability, dynamic frame length, cellular ALOHA networks, and frequency reuse); CSMA (issues such as the effect of delays and the hidden terminal problem); ISMA (Continued on next page) IEEE Personal Communications June 1998
EDITEDBY THOMASY.
c.WOO
ICPWC ’97 CONTRIBUTED BY VIJAY BHARGAVA The Third IEEE International Conference on Personal Wireless Communications, ICPWC ’97, successfully took place in Mumbai, the financial capital of India, from 17-19 December, 1997. The event resulted from the joint efforts of the IEEE Bombay Section, IEEE AES/COM/LEOS India Chapter, University of Victoria, IEEE Communications Society, I E E E Region 10, IEEE India Council, and IETE India. This year’s event witnessed a tremendous increase in the number of papers published, reaching 110 papers from 24 countries around the globe. The paper contributions were well balanced between academia and research organizations from industry and government. The Electronics and Telecommunications Research Institute (ETRI) was particularly well represented with 14 conference papers. Other major players in the wireless telecommunications industry, such as Uniden Corporation, Lucent Technologies, AT&T Laboratories, Northem Telecom, Ericsson, GTE, and Nokia also contributed several papers. More than 200 people participated in the three-day conference, including academic and industrial researchers working in radio communications technology, representatives from industrial manufacturers, as well as telecommunications operator managers. ICPWC has evolved rapidly since its modest beginning in 1994, which was held in Bangalore during 18-19 August, 1994. The second ICPWC gathering took place in New Delhi 19-21 February, 1996. It is clear that ICPWC is getting better with the passage of time and moving forward to become the premier conference on wireless communications and technologies in the Asia-Pacific region. The technical program combined two special events (the conference inaugural and plenary session and the executive panel session) with 24 technical sessions (three parallel tracks with approximately five papers each) on the topics of third-generation wireless systems, second-generation systems evolution, mobile and satellite communications, mobile computing, medium access control, mobility management, secure and reliable wireless communications, physical-layer impairments, digital signal processing, radio frequency transceiver design, software radio, propagation and channel modeling, wireless local loops,
IEEE Personal Communications
June 1998
The technical program content exhibits a strong focus on physical layer radio communication issues as well as nomadic computing spread-spectrum communications, and packet radio networks. In general, the technical program content exhibits a strong focus on physical layer radio communication issues as well as nomadic computing. Specifically, there were four technical sessions devoted to physical layer issues (interference suppression, code acquisition and tracking, modulation and coding, and power control) and two technical sessions each on mobile computing, third-generation systems, and wireless data networks. The conference inaugural speaker was Mr. N. Vitta1 (Chair of the Public Enterprise Selection Board, Government of India), who highlighted some of the issues and technical challenges faced by the telecommunication industry in India. His speech was followed by a plenary talk entitled “Wireless Personal and Multimedia Communications,” presented by Dr. Kazuhiko Sezi on behalf of Dr. Shuzo Kato, President and Chief Operating Officer of Uniden Corporation. In his presentation, Dr. Sezi highlighted some of the key milestones in providing ubiqutious multimedia communications. Subsequently, Dr. Tatu Koljanen of Nokia Mobile Phones delivered another plenary speech entitled “Evolution Towards 3rd Generation Wireless Access.” Besides discussion of the recent standardization activities for third-generation systems around the world, Dr. Koljanen also provide a European perspective on the evolution process toward the third-generation system (UMTS roadmap). The final agenda on the conference program was the executive panel session with the theme “Wireless Communications: The Road Ahead.” This theme was particularly fitting for a developing country like India because it is estimated that 40 to 60 percent of the new telephone connections in India will be based on wireless technologies. The panel was chaired by Dr. Umesh Amin (Director, AT&T Wireless). Other pan-
elists were Dr. Nitin Shah (Vice-President, Lucent Technologies) and Dr. Kumar Balachandran from Ericsson. This summary is only intended to provide a flavor of the conference program. The conference record should be consulted for details. A copy of the 540-page ICPWC ’97 proceedings (IEEE Catalog Number 97TH8338) may be ordered from I E E E Operations Center, P.O. Box 1331, 445 Hoes Lane, Piscatawav, New Jersey, 08855-1331 USA; tel:-+1-800-678IEEE; fax: + 1-908-981-9667; e-mail:
[email protected]. The Fourth I E E E ICPWC ’99 will be held in Jaipur, India, 17-19 February, 1999. A preliminary home page can be found at http://www.citr.ece.uvic.ca/ icpwc99 B O O K REVIEWS/CONTINUED
(issues such as collision resolution schemes and access reservation schemes). Then the chapter provides performance analysis such as throughput versus offered traffic, receiver capture, vulnerability to interference, stability, delay, and spatial distribution of packet traffic. The capita selecta chapter lists the companies active in wireless and cellular organizations and standards. The CDROM also attaches slides and computer programs. The slide show is appropriate for a short course on mobile communications and computing. The computer programs include hints for a Pascal program to compute outage probability in cellular networks with Rayleigh fading, shadowing and path loss, and a PROMOT Planning Tool for gathering telemetric data (DOS executable). This CD-ROM is meant to be platform-independent: the basic system requirements a r e a graphical Web browser and multimedia capabilities. The text is written in HTML and can be opened by any recent browser software. The authors have written the text with Netscape o r Microsoft Internet Explorer in view. The authors wish to expand t h e existing material to fill gaps and add new insights. The CDROM journal is open for submissions, in particular for multimedia-rich tutorials, overviews, and course texts. For m o r e information about this CDROM, please visit http://www.baltzer.nl/ wirelesscd
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