What is HS-SCCH (High-Speed Shared Control Channel)?

High-Speed Shared Control Channel is an additional channel to UMTS to increment downlink information rates. This is characterized in Release 5 of the UMTS details. It is additionally essential for the HSDPA. It conveys the data of Modulation scheme(1 bit) QPSK or 16QAM, Channelization code set (7bits), Transport block size ( 6bits), HARQ number (3bits), Redundancy version (3bits), New Data Indicator (1 bit) and UE identity (16 bits).