2G/GSM

 

 

 

 

Coding Scheme - GPRS

 

 

Channel Coding Scheme

CS-1

CS-2

CS-3

CS-4

Pre-coded USF

3

6

6

12

Info bits without USF

181

268

312

428

Parity bits BC

40

16

16

16

Tail bits

4

4

4

-

Output conv encoder

456

588

676

456

Punctured bits

0

132

220

-

Code rate

1/2

~2/3

~3/4

1

Data rate kbit/s for one slot

9.05

13.4

15.6

21.4

Maximum data speed with 8 time-slots

72.4 kb/s

107.2 kb/s

124.8 kb/s

171.2 kb/s

Note : USF stands for 'Uplink Status Flag'.