Page 923 - 5G Basics - Core Network Aspects

Transport aspects 2

12.3.3.2.1 O-SIGNATURE

The O-SIGNATURE message indicates to the FTU-R all main transmission parameters to be used during the
initialization.

Table 12-20 – O-SIGNATURE message

Field Field name Format

1 Message descriptor Message code
2 Supported subcarriers in the downstream direction (SUPPORTEDCARRIERSds
set) TX and RX bands

3 Supported subcarriers in the upstream direction (SUPPORTEDCARRIERSus descriptor
set)

4 Downstream transmit PSD mask (PSDMASKds)
5 Upstream transmit PSD mask (PSDMASKus) PSD descriptor
6 Channel discovery downstream PSD (CDPSDds)
7 Parameters for UPBO reference PSD (UPBOPSD) Three bytes
8 Downstream minimum SNR margin (MINSNRMds) Two bytes
9 Downstream target SNR margin (TARSNRMds) Two bytes
10 Downstream transmit window length (ds) One byte

11 Initial value of the time gap Tg1' Two bytes
12 Upstream probe sequence length (Nprobe_us) One byte
13 Upstream probe sequence descriptor Variable
14 Reference superframe count Two bytes
15 Downstream probe sequence length One byte
16 Downstream probe sequence descriptor Variable
17 Time marker indicating the start of upstream probe sequence One byte
18 Time marker indicating the start of downstream probe sequence One byte
19 Number of upstream data symbols (sus) to be used during the initialization One byte

20 Upstream RMC offset One byte
21 UPBO reference electrical length (UPBOKLREF) One byte
22 Number of downstream initialization data symbols for SNR estimation (Sds_snr) One byte
23 Upstream maximum aggregate transmit power (MAXATPus) 2 bytes

Field 1 "Message descriptor" is a unique one-byte code (0016) that identifies the message. See Table 12-7
for a complete list of codes.

Field 2 "Supported subcarriers in the downstream direction (SUPPORTEDCARRIERSds)" conveys indices of
all subcarriers that are allocated for transmission in the downstream direction, expressed as a set of bands.
Each band is a group of SUPPORTEDCARRIERSds with consecutive indices. The field shall be formatted as
"band descriptor", using the format shown in Table 12-21.
Field 3 "Supported subcarriers in the upstream direction (SUPPORTEDCARRIERSus)" conveys indices of all
subcarriers that are allocated for transmission in the upstream direction, expressed as a set of bands. Each
band is a group of SUPPORTEDCARRIERSus with consecutive indices. The field shall be formatted as "bands
descriptor", using the format shown in Table 12-21.

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