Abstract
This book describes the evolution of 3G mobile systems from wideband code division multiple access (WCDMA) to High-Speed Packet Access (HSPA) and its continued evolution, and finally the 3G Long-Term evolutions. The technology evolution does not stop with HSPA Evolution and Long-Term Evolution (LTE). The technology race for the next generation of mobile communication has already started with regulatory bodies, standards organizations, market forums, research bodies and, other bodies taking various initiatives. The chapter focuses on IMT-Advanced, the research community, and the standardization bodies. While LTE standardization is not yet completely finalized, the race for the next radio interface is already ongoing. Many activities are initiated in the research community and some standardization developing organizations are about to start (their work towards IMT-Advanced. However, IMT-Advanced is still several years away whereas HSPA Evolution and LTE are just around the corner. The chapter concludes that HSPA evolution is built as a continuing evolution of the existing WCDMA/HSPA technology whereas LTE is a new radio access optimized purely for IP based traffic. These two technologies promise to give more services, capabilities, and performance to the end users than any other radio interface technology has been able to do to date.
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