High¿Speed Downlink Packet Access (HSDPA) is a 3G mobile telephony communications protocol in the High-Speed Packet Access (HSPA) family that allows networks based on Universal Mobile Telecommunications System to achieve higher data transfer speeds and capacities. This handbook provides technical information on all aspects of HSDPA/HSUPA. The topics covered range from basic concepts to research grade material, including future directions. This book is a valuable resource for those working on wireless communications networks.