GPRS Mobile Multislot Classes Explained

This page covers GPRS mobile multislot classes and mentions the number of maximum slots supported in uplink and downlink. It covers GPRS class 12, class 32, and class 33.

Multislot Class Table

| Multislot class | Maximum number of slots | Type of GPRS Mobile | | --------------- | ----------------------- | ------------------- | --- | --- | | | Rx | Tx | Sum | | 1 | 1 | 1 | 2 | 1 | | 2 | 1 | 2 | 2 | 1 | | 3 | 1 | 3 | 2 | 2 | | 4 | 3 | 1 | 4 | 1 | | 5 | 2 | 2 | 4 | 1 | | 6 | 3 | 2 | 4 | 1 | | 7 | 3 | 3 | 4 | 1 | | 8 | 4 | 1 | 5 | 1 | | 9 | 3 | 2 | 5 | 1 | | 10 | 4 | 2 | 5 | 1 | | 11 | 4 | 3 | 5 | 1 | | Class 12 | 4 | 4 | 5 | 1 | | 13 | 3 | 3 | NA | 2 | | 14 | 4 | 4 | NA | 2 | | 15 | 5 | 5 | NA | 2 | | 16 | 6 | 6 | NA | 2 | | 17 | 7 | 7 | NA | 2 | | 18 | 8 | 8 | NA | 2 | | 19 | 6 | 2 | NA | 1 | | 20 | 6 | 3 | NA | 1 | | 21 | 6 | 4 | NA | 1 | | 22 | 6 | 4 | NA | 1 | | 23 | 6 | 6 | NA | 1 | | 24 | 8 | 2 | NA | 1 | | 25 | 8 | 3 | NA | 1 | | 26 | 8 | 4 | NA | 1 | | 27 | 8 | 4 | NA | 1 | | 28 | 8 | 6 | NA | 1 | | 29 | 8 | 8 | NA | 1 | | 30 | 5 | 1 | 6 | 1 | | 31 | 5 | 2 | 6 | 1 | | Class 32 | 5 | 3 | 6 | 1 | | Class 33 | 5 | 4 | 6 | 1 | | 34 | 5 | 5 | 6 | 1 | | 35 | 5 | 1 | 6 | 1 | | 36 | 5 | 2 | 6 | 1 | | 37 | 5 | 3 | 6 | 1 | | 38 | 5 | 4 | 6 | 1 | | 39 | 5 | 5 | 6 | 1 | | 40 | 6 | 1 | 7 | 1 | | 41 | 6 | 2 | 7 | 1 | | 42 | 6 | 3 | 7 | 1 | | 43 | 6 | 4 | 7 | 1 | | 44 | 6 | 5 | 7 | 1 | | 45 | 6 | 6 | 7 | 1 |

Multislot Class Parameters

The multislot classes are characterized by the following useful parameters:

• Tx: Indicates the maximum number of timeslots allowed in the uplink (i.e., transmit direction).

• Rx: Indicates the maximum number of timeslots allowed in the downlink (i.e., receive direction).

• Sum: Indicates the maximum number of combined timeslots allowed in Tx+Rx.

• Type of GPRS mobile: There are two types of mobiles available in GPRS.

  • Type 1 mobile: Cannot transmit and receive at the same time. This type of mobile supports both GMSK and 8-PSK modulation schemes in downlink. It supports only GMSK in the uplink.
  • Type 2 mobile: Can transmit and receive at the same time. It supports 8PSK in both downlink and uplink direction.