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18 March 2010
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Tables
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Data Over Cellular: A Look at GPRS
| TABLE 1:
Comparison of GSM, IS-136,and EDGE Interface Specifications
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GSM
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IS-136
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EDGE
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| Channel bandwidth
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200 kHz
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30 kHz
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200 kHz
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| Raw channel bit rate
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270.833 kbps
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48.6 kbps
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812.5 kbps
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| Use bit rate
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14.4 kbps
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19.2 kbps (analog CDPD)
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Up to 384 kbps
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| Modulation
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GMSK
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½/ 4 DQPSK
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8-PSK
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| TABLE 2: GPRS Multishot Classes
1
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| Multislot class
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Maximum number of slots
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Minimum number of slots
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Type
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Rx
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Tx
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Sum
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Tta
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Ttb
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Tra
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Trb
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| 1
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1
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1
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2
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3
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2
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4
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2
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1
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| 2
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2
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1
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3
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3
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2
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3
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1
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1
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| 3
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2
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2
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3
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3
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2
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3
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1
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1
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| 4
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3
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1
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4
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3
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1
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3
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1
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1
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| 5
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2
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2
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4
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3
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1
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3
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1
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1
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| 6
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3
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2
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4
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3
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1
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3
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1
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1
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| 7
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3
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3
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4
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3
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1
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3
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1
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1
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| 8
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4
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1
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5
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3
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1
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2
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1
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1
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| 9
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3
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2
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5
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3
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1
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2
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1
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1
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| 10
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4
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2
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5
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3
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1
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2
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1
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1
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| 11
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4
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3
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5
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3
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1
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2
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1
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1
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| 12
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4
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4
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5
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2
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1
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2
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1
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1
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| 13
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3
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3
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NA
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NA
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a)
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3
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a)
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2
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| 14
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4
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4
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NA
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NA
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a)
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3
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a)
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2
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| 15
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5
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5
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NA
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NA
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a)
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3
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a)
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2
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| 16
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6
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6
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NA
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NA
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a)
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2
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a)
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2
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| 17
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7
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7
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NA
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NA
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a)
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1
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0
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2
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| 18
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8
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8
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NA
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NA
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0
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0
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0
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2
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| 19
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6
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2
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NA
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3
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b)
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2
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c)
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1
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| 20
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6
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3
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NA
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3
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b)
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2
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c)
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1
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| 21
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6
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4
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NA
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3
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b)
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2
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c)
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1
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| 22
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6
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4
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NA
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2
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b)
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2
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c)
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1
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| 23
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6
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6
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NA
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2
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b)
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2
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c)
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1
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| 24
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8
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2
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NA
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3
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b)
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2
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c)
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1
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| 25
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8
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3
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NA
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3
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b)
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2
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c)
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1
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| 26
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8
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4
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NA
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3
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b)
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2
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c)
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1
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| 27
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8
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4
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NA
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2
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b)
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2
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c)
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1
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| 28
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8
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6
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NA
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2
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b)
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2
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c)
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1
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| 29
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8
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8
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NA
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2
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b)
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2
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c)
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1
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| NOTES:
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| a) = 1 with frequency hopping.
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| = 0 without frequency hopping.
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| b) = 1 with frequency hopping or change from Rx to Tx
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| = 0 without frequency hopping and no change from Rx to Tx.
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| c) = 1 with frequency hopping or change from Tx to Rx
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| = 0 without frequency hopping and no change from Tx to Rx.
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Feature
Return to the
Table of Contents
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