- if search fails, keeps increasing the rx gain (set by --ue-rxgain) by
3 db until USRP max rx gain
- if initial sync is success, sets the rxgain to the value of
(TARGET_RX_POWER (50) - pbch digital power in dB/RE)
- Phy config update and Sidelink frame parameters initialisation
- PSBCH scheduler to trigger TX PSBCH/RX PSBCH actions
- Sidelink indication with rx ind to trigger send SL-MIB to MAC
- Enable Scope for PSBCH use -d or --dqt
- Enable system testing of PSBCH for example using RFSIMULATOR:
- UE1 is a SYNCRONISATION SOURCE UE which transmits PSBCH
started using command -
sudo ./nr-uesoftmodem --sl-mode 2 --sync-ref 4 --rfsim --rfsimulator.serveraddr server
- UE2 syncs onto UE1 during sidelink search, gets the timing and continues to receive PSBCH
started using command -
sudo ./nr-uesoftmodem --sl-mode 2 --rfsim --rfsimulator.serveraddr 127.0.0.1
- In the default use case 2 Sidelink SSBs sent over 16 frames.
- In case SL-SSB configuration needs to be changed use -O option in the above command like
-O ../../../targets/PROJECTS/NR-SIDELINK/CONF/sidelink_preconfig_1txpool.conf
- Phy configuration will be prepared by MAC
- Sidelink preconfiguration parameters passed from RRC->MAC
- Only 1 SSB TA allocation used
- psbch payload prepared by MAC after receiving the tx slss req
LocationandBandwidth adjusted according to the location of SSB and Controlresourceset 0
For example for 106RBs configuration files -
- AbsoluteFrequencySSB = 641032 = RB43 (1032/24) - points to Subcarrier 0 of RB10 of SSB block
- Hence SSB is located from RB33-RB53
- Coresetzero sent in MIB is 0 which means offset 0, RBsize 24 from Start of SSB according to table 13.4 in Spec 38.213
- InitialBWP should start from RB 33 (offset is 0 from SSB) and should be a size of minimum 24 RBs.
- SLIV = 275 * (24-1) + 33 = 6358
Controlresourceset value wrongly configured to 12 , changed to 0 as sent in MIB.
Procedure fill_dmrs_mask is modified.
- PDSCH Mapping Type B is supported
- Modified according to sections 5.1.6.2 of Spec 38.214
- Single and double symbol DMRS are handled in Type A and Type B
Mapping type according to the time domain allocation from DCI should be used to get the values of DMRS config
For sending sib1 - DCI FORMAT 1_0 will be used with SI_RNTI, UE should perform these actions
according to sections 5.1.6.2 of Spec 38.214
Additional DMRS set to pos2 in case of msg2 reception, msg3 transmission.
Mapping type B is added to RRC reconfig.
- nr_dlsim updated to test typeA and typeB. Verified the changes.
- RFSIM Validation of PDSCH Mapping TypeB by changing timedomainallocation in configuration files.
- CDM groups used, multiple DMRS locations tested
- REMOVED compiler define NR_SC_FDMA
- enabled -Z option in ulsim for testing NR SC-FDMA
- Gnb UL Processing of LLRS even if last symbol allocated has no data
- transform precoding Enumerations used
Raghavendra Dinavahi