Can somebody please explain this SDCCH + SACCH combination
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Can somebody please explain this SDCCH + SACCH combination
in Uplink
sdcch is used for some procedure like ciphering authentication sending sms in not connected mode (outband signaling) and also measurement then when you increase the number of the sdcch you give more chance to subscriber to connect to bts there is a trafic formula i will give it later so sdcch ressources are fixed resources specified on bsc database when sdcch congestion threshold is reached then the system will move 8 channel from tchsd pool with best quality to sdcch backup pool and then will check again if there is an empty sdcch if not the system will move this channel from backup pool to sdcch pool and the the channel will be used when all the 8 channels are released then they will be moved back to tchsd pool
in this way we give more flexibility to the system to managee the sdcch channels
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