Page 1262 - 5G Basics - Core Network Aspects

2 Transport aspects

In steady state periods, Cn(t) is a value in the range Cn,min to Cn,max. A value outside this range indicates that
there is a misalignment of the expected client bit rate and the actual client bit rate. During transient
periods after e.g., a frequency step, Cn(t) may be temporarily outside the range Cn,min to Cn,max.
Cm(t) client data entities are mapped into the payload area of the server frame or multiframe using a sigma-
delta data/stuff mapping distribution. It provides a distributed mapping as shown in Figure D.3. Payload
field j (j = 1 .. Pm,server) carries

– client data (D) if (j  Cm(t)) mod Pm,server < Cm(t); (D-18)

– stuff (S) if (j  Cm(t)) mod Pm,server ≥ Cm(t). (D-19)
Values of n, m, M, fclient, fserver, Tserver, Bserver, and Pm,server for OPUk and ODTUk.ts
The values for n, m, M, fclient, fserver, Tserver, Bserver, and Pm,server are specified in Table D.1.

Table D.1 – OPUk, ODTUk.ts and ODTUCn.ts GMP parameter values
GMP CBR client into OPUk ODUj into OPUk (ODTUk.ts) ODUk into OPUCn (ODTUCn.ts)
parameter
n 8 (default) 8 8
1 (client specific)
m m 8  M m 8  M m 128  M
OPU0: 8  1 = 8 ODTU2.ts: 8  ts ODTUCn.ts: 128  ts
OPU1: 8  2 = 16 ODTU3.ts: 8  ts
OPU2: 8  8 = 64 ODTU4.ts: 8  ts
OPU3: 8  32 = 256
OPU4: 8  80 = 640
f client CBR client bit rate and ODUj bit rate and tolerance ODUk bit rate and tolerance
tolerance (Table 7-2) (Table 7-2)
f server OPUk Payload bit rate and ODTUk.ts Payload bit rate and ODTUCn.ts Payload bit rate and
tolerance (Table 7-3) tolerance (Table 7-7) tolerance (Table 7-7)
T server ODUk/OPUk frame period OPUk multiframe period OPUCn multiframe period (Table
(Table 7-4) (Table 7-6) 7-6)
B server OPU0: 8  15232 ODTU2.ts: 8  ts  15232 ODTUCn.ts: 128  ts  952
OPU1: 8  15232 ODTU3.ts: 8  ts  15232
OPU2: 8  15232 ODTU4.ts: 8  ts  15200
OPU3: 8  15232
OPU4: 8  15200
P m, server OPU0: 15232 ODTU2.ts: 15232 ODTUCn.ts: 952
OPU1: 7616 ODTU3.ts: 15232
OPU2: 1904 ODTU4.ts: 15200
OPU3: 476
OPU4: 190
C8D range OPU0: N/A ODTUk.1: N/A ODTUCn.1: 0 to +15
OPU1: 0 to +1 ODTUk.2: 0 to +1 ODTUCn.2: 0 to +31
OPU2: 0 to +7 ODTUk.3: 0 to +2 ODTUCn.3: 0 to +47
OPU3: 0 to +31 ODTUk.4: 0 to +3 ODTUCn.4: 0 to +59
OPU4: 0 to +79 : :
ODTUk.8: 0 to +7 ODTUCn.20n-1: 0 to +320n-1
: ODTUCn.20n: 0 to +320n
ODTUk.32: 0 to +31
:
ODTUk.79: 0 to +78
ODTUk.80: 0 to +79

C1D range OPU0: 0 to +7 Not applicable Not applicable

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