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Merge remote-tracking branch 'origin/ntn_continuous_sib19_updates' into integration_2025_w27 (!3398)

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continuously update SIB19 information for rfsim NTN LEO scenarios

Contains mainly these changes:

- gNB: add function nr_update_sib19() allowing to update SIB19
  information
- rfsimulator: update SIB19 contents every frame for LEO channel
  simulations
- NR UE: improve initial timing advance calculation from SIB19

Before, we only considered ta_Common_r17 and the SAT position from SIB19
to compute the initial timing advance value. This is good enough if the
satellite does not move too fast (e.g. GEO satellite).

Now we also consider ta_CommonDrift_r17, ta_CommonDriftVariant_r17 and
the SAT velocity together with the epoch time from SIB19. This improves
the accuracy of the initial TA computation, esp. for LEO satellite
scenarios.
This commit is contained in:
Robert Schmidt
2025-07-04 09:42:19 +02:00
parent 105d4f6dfb 7b991c4dbf
commit 06a5166f17
17 changed files with 350 additions and 81 deletions
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openair2/COMMON/mac_messages_def.h
+2
View File
@@ -60,3 +60,5 @@ MESSAGE_DEF(NR_RRC_MAC_CCCH_DATA_IND, MESSAGE_PRIORITY_MED_PLUS, NRRrcMacCcch
MESSAGE_DEF(NR_RRC_MAC_BCCH_DATA_IND, MESSAGE_PRIORITY_MED_PLUS, NRRrcMacBcchDataInd, nr_rrc_mac_bcch_data_ind)
MESSAGE_DEF(NR_RRC_MAC_SBCCH_DATA_IND, MESSAGE_PRIORITY_MED_PLUS, NRRrcMacSBcchDataInd, nr_rrc_mac_sbcch_data_ind)
// Message to GNB_APP to update SIB19 satellite position information
MESSAGE_DEF(GNB_SAT_POSITION_UPDATE, MESSAGE_PRIORITY_MED, gnb_sat_position_update_t, gnb_sat_position_update)
openair2/COMMON/mac_messages_types.h
+3
View File
@@ -31,6 +31,7 @@
#include <LTE_DRX-Config.h>
#include "OCTET_STRING.h"
#include "NR_MAC_gNB/mac_config.h"
//-------------------------------------------------------------------------------------------//
// Defines to access message fields.
@@ -61,6 +62,8 @@
#define RRC_MAC_DRX_CONFIG_REQ(mSGpTR) (mSGpTR)->ittiMsg.rrc_mac_drx_config_req
#define GNB_SAT_POSITION_UPDATE(mSGpTR) (mSGpTR)->ittiMsg.gnb_sat_position_update
// Some constants from "LAYER2/MAC/defs.h"
#define BCCH_SDU_SIZE (512)
#define BCCH_SDU_MBMS_SIZE (512)