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M80 Hardware Design

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Appendix B: GPRS multi-slot classes

Twenty-nine classes of GPRS multi-slot modes are defined for MS in GPRS specification.

Multi-slot classes are product dependant, and determine the maximum achievable data rates in

both the uplink and downlink directions. Written as 3+1 or 2+2, the first number indicates the

amount of downlink timeslots, while the second number indicates the amount of uplink timeslots.

The active slots determine the total number of slots the GPRS device can use simultaneously for

both uplink and downlink communications. The description of different multi-slot classes is

shown in Table 33.

Table 33: GPRS multi-slot classes

Multislot class

Downlink slots

Uplink slots

Active slots

Quectel

Confidential

1 2 ... 82 83 84 85 86 87 88

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