Page 745 - 5G Basics - Core Network Aspects
P. 745

Transport aspects                                              2


                                 Table 9-6 – Format for downstream logical frame parameters

               Field name          Format                                 Description

             TTRds          One byte: [00 aaaaaa]   aaaaaa = TTRds, the number of symbol positions in the NOI of the
                                                  downstream logical frame, coded as an unsigned integer.
                                                  Within the valid range of values from 1 to 32, TTRds ≤ Mds.
             TAds, IDFds    One byte: [b00 aaaaa]   aaaaa = TAds, the number of quiet symbol positions at the beginning of
                                                  the DOI of the downstream logical frame, coded as an unsigned
                                                  integer.
                                                  Within the valid range of values from 0 to 31, TAds ≤ Mds – TBUDGETds
                                                  (see clause 10.5). If TBUDGETds ≤ TTRds, TAds = 0.
                                                  b = IDFds, idle-data flag indicating the symbol type to be used over the
                                                  downstream NOI.
                                                  b = 0 indicates that the FTU-O may transmit idle or data symbols in
                                                  the NOI.
                                                  b = 1 indicates that the FTU-O shall transmit only data symbols over
                                                  the first min(TTRds, TBUDGETds) symbol positions in the downstream
                                                  logical frame.
             TBUDGETds      One byte: [00 aaaaaa]   aaaaaa = the value of the parameter TBUDGETds (see clause 10.7),
                                                  coded as an unsigned integer.
                                                  Within the valid range of values from 1 to 32, TBUDGETds ≤ Mds.



                             Table 9-7 – Format for upstream logical frame configuration request
               Field name          Format                                 Description

             TTRus          One byte: [00 aaaaaa]   aaaaaa = TTRus, the number of symbol positions in the NOI of the
                                                  upstream logical frame, coded as an unsigned integer.
                                                  Within the valid range of values from 1 to 25, TTRus ≤ Mus.
             TAus, IDFus    One byte: [b00 aaaaa]   aaaaa = TAus, the number of quiet symbol positions at the beginning of
                                                  the DOI of the upstream logical frame, coded as an unsigned integer.
                                                  Within the valid range of values from 0 to 24, TAus ≤ Mus – TBUDGETus
                                                  (see clause 10.5). If TBUDGETus ≤ TTRus, TAus = 0.
                                                  b = IDFus, idle-data flag indicating the symbol type to be used over the
                                                  upstream NOI.
                                                  b = 0 indicates that the FTU-R may transmit idle or data symbols in the
                                                  NOI.
                                                  b = 1 indicates that the FTU-R shall transmit only data symbols over
                                                  the first min(TTRus, TBUDGETus) symbol positions in the upstream
                                                  logical frame.
             TBUDGETus      One byte: [00 aaaaaa]   aaaaaa = the value of the parameter TBUDGETus (see clause 10.7),
                                                  coded as an unsigned integer.
                                                  Within the valid range of values from 1 to 25, TBUDGETus ≤ Mus.



















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