百科解釋
SDCCH - Stand-alone Dedicated Control Channel
This channel is used in the GSM system to provide a reliable connection for signalling and SMS (Short Message Service) messages. The SACCH (Slow Associated Control Channel) is used to support this channel.
SDCCH
SDCCH的全稱是獨(dú)立專用控制信道(Stand-Alone Dedicated Control Channel),用在分配TCH之前呼叫建立過程中傳送系統(tǒng)信令。例如登記和鑒權(quán)在此信道上進(jìn)行。上行和下行信道,點(diǎn)對(duì)點(diǎn)方式傳播。一般進(jìn)行的信令交互主要利用SDCCH信道承載,SDCCH信道的分配也稱立即指配過程。有時(shí)還會(huì)進(jìn)行短信傳輸。