Thomas Kunz
Systems and Computer Engineering
42
Data Services in GSM
nData transmission standardized with only 9.6 kbit/s
–advanced
coding allows 14.4 kbit/s
–not enough
for Internet and multimedia applications
nHSCSD (High-Speed Circuit Switched Data)
–already
standardized
–bundling of
several time-slots to get higher AIUR (Air Interface User Rate)(e.g., 57.6 kbit/s using 4 slots, 14.4
each)
–advantage:
ready to use, constant quality, simple
–disadvantage:
channels blocked for voice transmission
