Thomas Kunz
Systems and Computer Engineering
44
GSM Data Properties: Evaluation
nCircuit-switched data is good for cases when continuous data flow is needed/required
nBilling is based on time, not amount of data
nLimited number of mobiles can be supported per carrier
(8 channels)
nCircuit-switched data is not optimal for
–packet-based
protocols such as IP
–bursty
traffic
–unbalanced
traffic (using mainly one channel direction)
nÞ Packet switched service is needed for GSM
nÞ GPRS standardization was started