Page 1266 - 5G Basics - Core Network Aspects

2 Transport aspects

step. This corresponds to the transition to the lower row of states (the "S" states) in Figure D.7 and Figure
D.8. At this point, the GMP sink has identified the type of increment or decrement operation that is being
signalled in frame i+1. As shown in Figure D.9, the sink then applies the appropriate bit inversion pattern
from Table D.2 to the received C1-C14 field or the bit inversion pattern from Table D.3 to the received
C1-C10 field to determine the transmitted Cm(t) value. Synchronization has now been achieved since the
GMP sink has determined the current Cm(t) and knows the expected Cm(t) change in frame i+2.

Figure D.7 – GMP sink count synchronization process representation using the two least significant bits of
the count as inputs
Optimization has shown that Figure D.8 provides the same function. Either one can be chosen. For
historical reasons both are kept.

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