Page 1084 - 5G Basics - Core Network Aspects

2 Transport aspects

Figure VI.4(b) shows a similar configuration for the upstream. An item worth mentioning is that for lines 3
and 4 in the logical frame containing the sync symbol, the alternative configuration of the DO parameters
communicated in the RMC are TTR=3, TBUDGET=6, and TA=2. The corresponding derived parameters are
B'=3 and B=2 for line 3 and B=1 for line 4.

s; = M × T seconds) s; = M × T seconds)
F
F
TDD frame (M = 23 symbol T F F S TDD sync frame (M = 23 symbol T F F S
Downstream M = 14 M = 8 Downstream M = 14 M = 8
us
us
ds
ds
Line 1 rmc d d d d d d d d Upstream rmc d d d d d d d d Upstream rmc ...
TTR = 5; TBUDGET = 9; TA = 0; TTR = 5; TBUDGET = 9; TA = 0;
ds
ds
ds
ds
ds
ds
[TIQ = 0, B' = 4, B = 4]; [TIQ = 0, B' = 4, B = 4];
Line 2 rmc d d d d d d d d Upstream rmc d d d d d d q q Upstream rmc ...
TTR = 5; TBUDGET = 9; TA = 0; TTR = 5; TBUDGET = 9; TA = 0;
ds
ds
ds
ds
ds
ds
[TIQ = 0, B' = 4, B = 4]; [TIQ = 0, B' = 4, B = 2];
Line 3 d d d d rmc d d d d d Upstream d d d rmc d d d d d Upstream d q q q rmc ...
TTR = 5; TBUDGET = 9; TA = 4; TTR = 5; TBUDGET = 10; TA = 4;
ds
ds
ds
ds
ds
ds
[TIQ = 0, B' = 4, B = 4]; [TIQ = 0, B' = 5, B = 2];
Line 4 d d d d rmc d d d d d Upstream d d d rmc d d d d d Upstream d d d d rmc ...
TTR =5; TBUDGET = 9; TA = 4; TTR = 5; TBUDGET = 10; TA = 4;
ds
ds
ds
DRMC = 4 [TIQ = 0, B' = 4, B = 4]; ds [TIQ = 0, B' = 5, B = 5]; ds ds
ds
t = 0 t = T F t = 2T F
NOI DOI NOI DOI
DS logical frame (T ) containing DS sync symbol DS logical frame without DS sync symbol
F
rmc rmc symbol d data symbol = q quiet symbol sync symbol
G.9701(14)_FVI.4a
TTR = duration of the normal operation interval TA = number of quiet symbols immediately after TTR
TBUDGET+TA–1 = index of the last symbol position in a logical frame eligible for carrying a data symbol
(a) Downstream
TDD sync frame (M = 23symbol s; T F = M × T seconds) TDD sync frame (M = 23 symbol T F = M × T seconds)
s;
F
S
S
F
F
F
M = 14 Upstream M = 8 M = 14 Upstream M = 8 M = 14 M = 8
us
ds
us
ds
ds
us
Line 1 Downstream rmc d d d d Downstream rmc d d d q Downstream rmc d ...
TTR = 3; TBUDGET = 5; TA = 0; TTR = 3; TBUDGET = 5; TA = 0;
us
us
us
us
us
us
[B' = 2, B = 2]; [B' = 2, B = 1];
Line 2 Downstream rmc d d d q Downstream rmc d d d d Downstream rmc d ...
TTR = 3; TBUDGET = 5; TA = 0; TTR = 3; TBUDGET = 5; TA = 0;
us
us
us
us
us
us
[B' = 2, B = 1]; [B' = 2, B = 2];
Line 3 Downstream d d d rmc d d Downstream d d rmc d d Downstream d d d rmc d ...
TTR = 3; TBUDGET = 5; TA = 3; TTR = 3; TBUDGET = 6; TA = 2;
us
us
us
us
us
us
[B' = 2, B = 2]; [B' = 3, B = 3];
Line 4 Downstream d rmc d d Downstream d q rmc d d Downstream d q q rmc d ...
TTR = 3; TBUDGET = 5; TA = 3; TTR = 3; TBUDGET = 6; TA = 2;
us
us
us
us
us
us
[B' = 2, B = 1]; [B' = 3, B = 1];
t =0 DRMC = 3 t = T F
us
NOI DOI NOI DOI
Upstream logical frame (T ) containing sync symbol Upstream logical frame (T ) without sync symbol
F
F
rmc rmc symbol d data symbol = q quiet symbol sync symbol
G.9701(14)_FVI.4b
TTR = duration of the normal operation interval TA = number of quiet symbols immediately after TTR
TBUDGET+TA–1 = index of the last symbol position in a logical frame eligible for carrying a data symbol
(b) Upstream
Figure VI.4 – Example 3: Two distributed vector groups in DOI
Figure VI.5 shows example of discontinuous operation in the NOI with TBUDGET < TTR. When the
TBUDGET<TTR, only idle symbols may be inserted in the remaining time slots of the NOI to preserve
operation of the vector group.
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