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doc: clarify enable_sdap as RRC SDAP header policy

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Log, param help, and rrc-usage.md described enable_sdap as toggling the
SDAP layer, while it only sets sdap-HeaderUL/DL in RRC SDAP-Config.

Signed-off-by: Guido Casati <guido.casati@openairinterface.org>
This commit is contained in:
Guido Casati
2026-07-09 15:04:11 +02:00
parent 223fd132e0
commit 14b5bcb600
3 changed files with 5 additions and 5 deletions
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6
doc/RRC/rrc-usage.md
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@@ -90,9 +90,9 @@ the [MAC configuration](../MAC/mac-usage.md) as well for SIB configuration.
`0xffffff` is a reserved value and means "no SD"
Note that: SST=1, no SD is "eMBB"; SST=2, no SD is "URLLC"; SST=3, no SD
is "mMTC"
- `enable_sdap` (default: true): enable the use of the SDAP layer. If
deactivated, a transparent SDAP header is prepended to packets, but no
further processing is being done.
- `enable_sdap` (default: true): set `sdap-HeaderUL` and `sdap-HeaderDL` to
present in the RRC `SDAP-Config` IE for SA PDU sessions. If false, both
headers are absent (per DRB). SDAP entities are still created, SDAP layer always enabled.
- `cu_sibs` (default: `[]`) list of SIBs to give to the DU for transmission.
Currently supported:
- SIB2: serving-cell reselection parameters (configured in `sib2_config`)

2
openair2/GNB_APP/gnb_config.c
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@@ -2435,7 +2435,7 @@ gNB_RRC_INST *RCconfig_NRRRC()
nrrrc_config.num_plmn = set_plmn_config(nrrrc_config.plmn, k);
nrrrc_config.enable_sdap = *GNBParamList.paramarray[i][GNB_ENABLE_SDAP_IDX].iptr;
LOG_I(GNB_APP, "SDAP layer is %s\n", nrrrc_config.enable_sdap ? "enabled" : "disabled");
LOG_I(GNB_APP, "SDAP UL/DL headers in RRC are %s\n", nrrrc_config.enable_sdap ? "present" : "absent");
nrrrc_config.um_on_default_drb = *(GNBParamList.paramarray[i][GNB_UMONDEFAULTDRB_IDX].uptr);
}//

2
openair2/GNB_APP/gnb_paramdef.h
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@@ -102,7 +102,7 @@ typedef enum {
#define GNB_CONFIG_STRING_1ST_ACTIVE_BWP "first_active_bwp"
#define GNB_CONFIG_STRING_LIMIT_RSRP_REPORT "max_num_RSRP_reported"
#define GNB_CONFIG_HLP_STRING_ENABLE_SDAP "enable the SDAP layer\n"
#define GNB_CONFIG_HLP_STRING_ENABLE_SDAP "set sdap-HeaderUL/DL present in RRC SDAP-Config (false = both absent)\n"
#define GNB_CONFIG_HLP_FORCE256QAMOFF "suppress activation of 256 QAM despite UE support"
#define GNB_CONFIG_HLP_MAXMIMOLAYERS "limit on maxMIMO-layers for DL"
#define GNB_CONFIG_HLP_DISABLE_HARQ "disable feedback for all HARQ processes (REL17 feature)"