Alessandro Andreadis – författare

Radio transmissions have opened new frontiers allowing the exchange of information with remote units. From the first applications of telegraphy and radio broadcast, wireless transmissions have obtained a great success with the widespread diffusion of mobile communications. We live in the communication era, where any kind of information must be easy accessible to any user at any time. Mobile communication systems are the technical support that allows the realization of such concepts. With the term mobile communications we embrace a set of technologies for radio transmissions, network protocols, mobile terminals and network elements. The widespread diffusion of wireless communications is making national borders irrelevant in the design, delivery and billing of services, thus requiring international coordination of standardization efforts in order to evolve regional systems towards global ones. Parallel to the evolution of radio-mobile systems, we assist to the massive diffusion of Internet network and contents, thus allowing many users on the earth to be interconnected and to exchange any kind of information, data, images and so on.

This volume focuses on the air interface of mobile networks at different layers according to the OSI Reference Model. The authors provide an overview of several wireless communication systems including GPRS, 3G (in particular, W-CDMA and UTRA-TDD), HIPERLAN/2-type as well as mobile satellite systems. Then, a detailed analysis of radio resource management issues is carried out for these different cases. The book proposes suitable solutions for the efficient support of mixed traffics with variable bit-rate and busty characteristics guaranteeing suitable quality of service levels. Analytical tools for predicting the performance for each traffic class are also included. Finally, the impact of user mobility and channel errors on higher layer protocols is detailed, showing the possible alternative solutions. This work should be a useful reference book for GPRS, 3G and satellite networks systems engineers, for researchers and advanced students working and studying in the field of mobile communications.