Book excerpt: The traditionally separate Fixed, Mobile, and Internet sectors have been evolving recently toward a single sector, offering numerous implications for those involved in technology and business. It is therefore essential for telecommunication professionals to get a keen grasp of where the industry is heading. Providing a solid foundation in the industry, Introduction to Mobile Communications: Technology, Services, Markets explores the core requirements of modern mobile telecommunications-from markets to technology. It explains how wireless systems work, how mobility is supported, the underlying infrastructure, and what interactions are needed among the different functional components. The book also examines how mobile communications are evolving in order to meet the changing needs of users. The information provided in the book comes primarily from the four core modules of the Certificate in Mobile Communications Distance Learning program run by the Informa Telecoms Academy in London. Designed by a highly experienced training development team, the program examines the complex and fascinating world of mobile communications. Designed to give a broad picture of mobile communications, the book provides an excellent grounding for those involved in both business and engineering-leaving them much better equipped to fulfill roles within their current or prospective companies