MobiCom 2004, September 26-October 1, 2004, Philadelphia,Pennsylvania, USA, Sponsored by ACM SIGMOBILE
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Welcome to MobiCom 2004!

 Message from the General Chair

Zygmunt J. Haas
It's hard to believe, but MobiCom is 10 years old. Yes, this year we celebrate the diamond anniversary. Many of us who were involved with the conference since its inception cannot but admire how MobiCom evolved over the years to be the prime conference for research in the area of mobile and wireless systems and networks.

And this year's conference is no exception. This year, the technical program consists of 26 top quality technical papers in addition to the challenging panel discussion organized by Victor Bahl on "Wireless Community Mesh Networks - Hype or the Next Big Frontier?" The conference will start with four tutorials on Sunday and Monday and will end with five workshops on Friday: POMC, VANET, WiSe, WMash, and MobiWac. Additionally, student papers session and demos session are also planned.

I am pleased to have four invited speakers deliver keynote and lunch speeches. Dr. Richard Gitlin will present a keynote speech on "The Wireless Century" and Dr. Dipankar Raychaudhuri will present a keynote speech on "Adaptive Wireless Networking Using Cognitive Radios as a Building Block." Prof. Robert Gallager will deliver a lunch speech on "Technology and its Information Theoretic Roots" and in another lunch speech, Mr. Masaki Yoshikawa will offer his views on "New Directions in Mobile Communications Services."

On the social side, the conference will start with a reception on Monday evening and a cruise dinner on Wednesday. We hope that these, as well as other opportunities to socialize, will be useful in establishing new contacts among the conference attendees. Although MobiCom is a conference rather then a workshop, the MobiCom's format of a single-track sessions with ample time for each presentation, was always effective in stimulating discussions among the attendees. So, I strongly encourage you to take full advantage of such technical interactions.

In its 10 years of existence, the location of MobiCom has approximately alternated between the East and the West Coasts, with every 3-4 years being held in an international location. This year, it was the East Coast turn and with the assistance of the MobiCom Steering Committee, we have settled on the choice of Philadelphia. Of course, given the historical background of the city, the choice was an easy one -- I am sure that most of you will find it worthwhile to spend sometime touring the rich heritage of the place.

I admit that when I accepted the invitation to serve as a General Chair, I have had no idea of what I am getting myself involved in. In spite of the fact that I have organized several workshops and served numerous times as a Technical Program Chair and Co-Chair of larger conferences, being the General Chair is a totally difference experience. Organization of MobiCom is nothing but trivial and requires a lot of negotiation skills. All in all, it was an interesting and learning experience for me.

Of course, this conference would not have been possible without the dedicated work of many people. Ravi Jain and Samir Das served as the Technical Program Co-Chairs, Per Gunningberg and Lars-Ake Larzon as the Workshops Co-Chairs, Andrew Campbell and Taieb Znati as the Tutorials Co-Chairs, Stefano Basagni and Chiara Petrioli as the Student Posters Co-Chairs, Prathima Agrawal and Tao Zhang as the Panel Co-Chairs and Elizabeth Belding-Royer as the Demos Chair. Thomas La Porta served as the MobiCom 2004 Finance Chair, Robin Kravets and Xin Wang as the Publicity Co-Chairs, Guohong Cao as the Local Arrangements Chair, Eylem Ekici as the Registration Chair, and Jens-Peter Redlich as the Industrial Liason Chair. All those folks have volunteered their free time to make MobiCom 2004 a success and have done a superb job in their assigned responsibilities. I am also grateful to the MobiCom Steering Committee, chaired by Prof. Imrich Chlamtac, that was helpful in advising me on some choices that I made in organizing the conference. Last but not least, my appreciation to the ACM staff that was always there when I needed their assistance: Erin Dolan, Maritza Nichols, Adrienne Griscti, Caryn Chan, Ginger Ignatoff, and Donna Baglio. Last but not least, I am also thankful to David Johnson for the front cover page design and invaluable help with the conference web site.

This year, four companies have sponsored the conference: Microsoft Research, DoCoMo USA Labs, NEC Laboratories America, Intel, HP, and Boeing . On behalf of MobiCom 2004, thank you for your support!

I wish you all a very enjoyable and educational experience at MobiCom 2004.

Zygmunt J. Hass
MobiCom 2004 General Chair

 Message from the Technical Program Chairs

We take great pleasure in welcoming you to the technical program of MobiCom 2004. This is the tenth year of MobiCom, a significant milestone in the history of this conference, widely regarded as the premier forum for presenting key research in the field of mobile computing and networking. We take pride in presenting to you a sparkling set of recent research results in the technical sessions, representing the forefront of the state-of-the-art.

This year, MobiCom received 326 paper submissions from authors spread over 40 countries across the globe. The large number of submissions indicates continued excitement in the field worldwide despite its incipient maturity. The topics of the submitted papers varied widely, although, as in the past few years, continued interest was noted in ad hoc and sensor networking. A technical program committee comprising 57 international leaders in the field had the difficult task of critically reviewing the submitted papers. On several occasions, opinions of experts outside the program committee were sought, although the technical program committee members did the overwhelming majority of the reviews themselves. The review process consisted of 3 phases. In the first phase, each paper was nominally assigned (at least) three reviewers from the technical program committee. One of them served as the "lead," whose responsibility was, in the second phase, to try to arrive at a consensus opinion on the paper via email discussion with the other reviewers. During this phase, additional reviews were often sought -- sometimes from outside the program committee -- to help sort out differences of opinion, or to increase the level of confidence in the reviews. At the end of the second phase, a set of 88 papers was selected for discussion at the program committee meeting.

The third phase of the review process was the program committee meeting, which was held in Boston on June 5-6, 2004. It was attended by 50 program committee members in addition to the program chairs. The meeting consisted of 16 hours of intense discussions and debate spread over a day and a half. In several cases papers were discussed more than once, and program committee members were invited to champion any paper they felt worthy of inclusion, even if it was not on the short list of the 88 papers. Finally, the program committee selected 26 papers -- representing the best of the best ┬ĘC for inclusion in the conference program. You will find these papers in the proceedings organized in 9 single-track sessions.

We take this opportunity to congratulate the winner of the best student paper award -- "MobiDesk: Mobile Virtual Desktop Computing" authored by Gong Su, Shaya Potter, Ricardo Baratto, and Jason Nieh -- all from Columbia University. This year approximately 65% of the accepted papers qualified as student papers. A sub-committee consisting of four program committee members was responsible for the selection. It turns out that the winning student paper is also the highest rated paper as per the original review scores!

We thank Raghu Dendukuri and Vishnu Navda for various administrative helps during entire review process, particularly for creating hard and softcopy backups of the conference database.

We also thank the program committee members who provided a detailed set of reviews and discussion comments, in spite of a very large review load, and took time to attend the program committee meeting. Many of them reviewed several additional papers beyond their originally assigned quota, when we needed additional opinions and often on a very short notice, and also took the initiative to seek out opinions of their expert colleagues. We believe that in most cases the quality and depth of the reviews were very high; indeed the reviews alone amounted to over 1000 printed pages of comments. Above all, we thank all the authors who chose MobiCom as the appropriate venue for publishing their research. It is their commitment that keeps the conference alive and exciting.

We hope that all of you will find the conference technically rewarding, and will also find time to catch up with your colleagues. Welcome again!

Samir R. Das and Ravi Jain
MobiCom 2004 Technical Program Chairs

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