SMGM SYSTEM
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8.3.3
Graphic representation
The bandwidth diagram of the standard system is shown. This is used for a basic understanding of how the
distribution is performed. Diagrams of other systems may differ from this.
Fig. 8-3 Basic principle: Bandwidth diagram
Item Type
Description
1
Bandwidth (40 MHz)
Gross data transfer rate: 150 mbit/s
Net data transfer rate: 80 mbit/s
2
Cycles
A cycle always consists of addressing each participant and data receipt
from each participant.
3
Send and receipt blocks
Distinction between the cycles in the two blocks: sending and receiving.
4
Cycle timeline
63 cycles are transferred per second.
5
Cycle time
The time for a cycle <16 ms (or 15.3 ms)
6
Send and receipt block
Sequence of the processes within a cycle. Sending (stationary page to
mobile page), receiving (mobile page to stationary page)
7
Slots
The slots stand for a data package to a (TxDATA) or from a (RxDATA) mo-
bile participant.
8
Cycle timeline
A cycle lasts <16 ms (or 15.3 ms)
9
Distribution
The distribution of the slots in a cycle depends on the respective system.
