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11 high - speed DownlinkPacket AccessAntti Toskala, Harri Holma, Troels Kolding, Frank Frederiksenand Preben MogensenThis chapter presents high - speed downlink packet access (HSDPA) for WCDMA thekey new feature included in Release 5 specifications. The HSDPA concept has beendesigned to increase packet data throughput by means of fast physical layer (L1) retrans-mission and transmission combining as well as fast link adaptation controlled by the NodeB (Base Transceiver Station (BTS)). This chapter is organised as follows: First, HSDPAkey aspects are presented and a comparison to Release 99 downlink packet access pos-sibilities is made. Next, the impact of HSDPA on the terminal uplink (user equipment(UE)) capability classes is summarised and an HSDPA performance analysis is presented,including a comparison to Release 99 packetdata capabilities. The chapter is concludedwith a short discussion of evolution possibilities of Release 99 WCDMA downlink packet Data CapabilitiesVarious methods for packet data transmission in WCDMA downlink already exist inRelease 99.
11 High-speed Downlink Packet Access Antti Toskala, Harri Holma, Troels Kolding, Frank Frederiksen and Preben Mogensen This chapter presents High-speed Downlink Packet Access …
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