The main new concept in HSCSD is that of multiple timeslots per handset. Current handsets
are limited practically to a maximum of 4 timeslots.
• Increases bit rate for GSM by a mainly
software upgrade
• Uses multiple GSM channel coding
schemes to give 4.8 kb/s, 9.6 kb/s or 14.4
kb/s per timeslot
• Multiple timeslots for a connection
e.g. using two timeslots gives data rates
up to 28.8 kb/s
• Timeslots may be symmetrical or
asymmetrical, e.g. two downlink, one
uplink, giving 28.8 kb/s downloads but 14.4
kb/s uploads.
are limited practically to a maximum of 4 timeslots.
• Increases bit rate for GSM by a mainly
software upgrade
• Uses multiple GSM channel coding
schemes to give 4.8 kb/s, 9.6 kb/s or 14.4
kb/s per timeslot
• Multiple timeslots for a connection
e.g. using two timeslots gives data rates
up to 28.8 kb/s
• Timeslots may be symmetrical or
asymmetrical, e.g. two downlink, one
uplink, giving 28.8 kb/s downloads but 14.4
kb/s uploads.
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