What is HSDPA (high speed downlink packet access)?

HSDPA permits networks to have higher information speeds and limits, which is dependent on the Universal Mobile Telecommunications System (UMTS). HSDPA additionally diminishes latency and the round trip time for applications. HSDPA is depends on shared channel transmission, and its main elements are shared channel and multi-code transmission, higher-order modulation, short transmission time interval (TTI), fast link adaptation and scheduling, and High Speed Downlink Shared Channels (HS-DSCH), quadrature phase-shift keying and 16-quadrature amplitude modulation.