Merge branch '2_Step_RA_fixes' into 'develop'

Improvements for 2-Step RA

See merge request oai/openairinterface5g!4106

ci-scripts/conf_files/gnb.sa.band78.106prb.usrpb210.RA_2-Step.conf

@@ -0,0 +1,271 @@
+# SPDX-License-Identifier: LicenseRef-CSSL-1.0
+
+Active_gNBs = ( "gNB-OAI");
+# Asn1_verbosity, choice in: none, info, annoying
+Asn1_verbosity = "none";
+
+gNBs =
+(
+ {
+    ////////// Identification parameters:
+    gNB_ID    =  0xe00;
+    gNB_name  =  "gNB-OAI";
+
+    // Tracking area code, 0x0000 and 0xfffe are reserved values
+    tracking_area_code  =  1;
+    plmn_list = ({ mcc = 001; mnc = 01; mnc_length = 2; snssaiList = ({ sst = 1; }) });
+
+    nr_cellid = 12345678L;
+
+    ////////// Physical parameters:
+
+    do_CSIRS                                                  = 1;
+    do_SRS                                                    = 1;
+
+    servingCellConfigCommon = (
+    {
+ #spCellConfigCommon
+
+      physCellId                                                    = 0;
+
+#  downlinkConfigCommon
+    #frequencyInfoDL
+      # this is 3600 MHz + 43 PRBs@30kHz SCS (same as initial BWP)
+      absoluteFrequencySSB                                             = 641280;
+      dl_frequencyBand                                                 = 78;
+      # this is 3600 MHz
+      dl_absoluteFrequencyPointA                                       = 640008;
+      #scs-SpecificCarrierList
+        dl_offstToCarrier                                              = 0;
+# subcarrierSpacing
+# 0=kHz15, 1=kHz30, 2=kHz60, 3=kHz120
+        dl_subcarrierSpacing                                           = 1;
+        dl_carrierBandwidth                                            = 106;
+     #initialDownlinkBWP
+      #genericParameters
+        # this is RBstart=27,L=48 (275*(L-1))+RBstart
+        initialDLBWPlocationAndBandwidth                               = 28875; # 6366 12925 12956 28875 12952
+# subcarrierSpacing
+# 0=kHz15, 1=kHz30, 2=kHz60, 3=kHz120
+        initialDLBWPsubcarrierSpacing                                   = 1;
+      #pdcch-ConfigCommon
+        initialDLBWPcontrolResourceSetZero                              = 12;
+        initialDLBWPsearchSpaceZero                                     = 0;
+
+  #uplinkConfigCommon
+     #frequencyInfoUL
+      ul_frequencyBand                                              = 78;
+      #scs-SpecificCarrierList
+      ul_offstToCarrier                                             = 0;
+# subcarrierSpacing
+# 0=kHz15, 1=kHz30, 2=kHz60, 3=kHz120
+      ul_subcarrierSpacing                                          = 1;
+      ul_carrierBandwidth                                           = 106;
+      pMax                                                          = 20;
+     #initialUplinkBWP
+      #genericParameters
+        initialULBWPlocationAndBandwidth                            = 28875;
+# subcarrierSpacing
+# 0=kHz15, 1=kHz30, 2=kHz60, 3=kHz120
+        initialULBWPsubcarrierSpacing                               = 1;
+      #rach-ConfigCommon
+        #rach-ConfigGeneric
+          prach_ConfigurationIndex                                  = 148;
+#prach_msg1_FDM
+#0 = one, 1=two, 2=four, 3=eight
+          prach_msg1_FDM                                            = 0;
+          prach_msg1_FrequencyStart                                 = 0;
+          zeroCorrelationZoneConfig                                 = 13;
+          preambleReceivedTargetPower                               = -96;
+#preamblTransMax (0...10) = (3,4,5,6,7,8,10,20,50,100,200)
+          preambleTransMax                                          = 10;
+#powerRampingStep
+# 0=dB0,1=dB2,2=dB4,3=dB6
+        powerRampingStep                                            = 1;
+#ssb_perRACH_OccasionAndCB_PreamblesPerSSB_PR
+#1=oneeighth,2=onefourth,3=half,4=one,5=two,6=four,7=eight,8=sixteen
+        ssb_perRACH_OccasionAndCB_PreamblesPerSSB_PR                = 4;
+#one (0..15) 4,8,12,16,...60,64
+        ssb_perRACH_OccasionAndCB_PreamblesPerSSB                   = 14;
+#ra_ContentionResolutionTimer
+#(0..7) 8,16,24,32,40,48,56,64
+        ra_ContentionResolutionTimer                                = 7;
+        rsrp_ThresholdSSB                                           = 19;
+#prach-RootSequenceIndex_PR
+#1 = 839, 2 = 139
+        prach_RootSequenceIndex_PR                                  = 2;
+        prach_RootSequenceIndex                                     = 1;
+        # SCS for msg1, can only be 15 for 30 kHz < 6 GHz, takes precendence over the one derived from prach-ConfigIndex
+        #
+        msg1_SubcarrierSpacing                                      = 1,
+# restrictedSetConfig
+# 0=unrestricted, 1=restricted type A, 2=restricted type B
+        restrictedSetConfig                                         = 0,
+
+        msg3_DeltaPreamble                                          = 1;
+        p0_NominalWithGrant                                         =-90;
+
+        # 0=sl1, 1=sl2, 2=sl4, 3=sl8, 4=sl10, 5=sl20, 6=sl40, 7=sl80, 8=sl160, 9=sl320
+        msgB_ResponseWindow_r16                                     = 5;
+        msgA_RSRP_Threshold_r16                                     = 19;
+
+        msgA_CB_PreamblesPerSSB_PerSharedRO_r16                      = 1;
+
+        msgA_MCS_r16                                                = 2;
+        nrofSlotsMsgA_PUSCH_r16                                     = 1;
+        # 0=one, 1=two, 2=three, 3=six
+        nrofMsgA_PO_PerSlot_r16                                     = 0;
+        msgA_PUSCH_TimeDomainOffset_r16                             = 8;
+        startSymbolAndLengthMsgA_PO_r16                             = 38;
+        mappingTypeMsgA_PUSCH_r16                                   = 0;
+        guardBandMsgA_PUSCH_r16                                     = 0;
+        frequencyStartMsgA_PUSCH_r16                                = 0;
+        nrofPRBs_PerMsgA_PO_r16                                     = 8;
+        # 0=one, 1=two, 2=four, 3=eight
+        nrofMsgA_PO_FDM_r16                                         = 0;
+        msgA_PUSCH_NrofPorts_r16                                    = 1;
+        nrofDMRS_Sequences_r16                                      = 1;
+        # 0=enabled, 1=disabled
+        msgA_TransformPrecoder_r16                                  = 1;
+
+# pucch-ConfigCommon setup :
+# pucchGroupHopping
+# 0 = neither, 1= group hopping, 2=sequence hopping
+        pucchGroupHopping                                           = 0;
+        hoppingId                                                   = 40;
+        p0_nominal                                                  = -90;
+
+   ssb_PositionsInBurst_Bitmap                                   = 1;
+
+# ssb_periodicityServingCell
+# 0 = ms5, 1=ms10, 2=ms20, 3=ms40, 4=ms80, 5=ms160, 6=spare2, 7=spare1
+      ssb_periodicityServingCell                                    = 2;
+
+# dmrs_TypeA_position
+# 0 = pos2, 1 = pos3
+      dmrs_TypeA_Position                                           = 0;
+
+# subcarrierSpacing
+# 0=kHz15, 1=kHz30, 2=kHz60, 3=kHz120
+      subcarrierSpacing                                             = 1;
+
+
+  #tdd-UL-DL-ConfigurationCommon
+# subcarrierSpacing
+# 0=kHz15, 1=kHz30, 2=kHz60, 3=kHz120
+      referenceSubcarrierSpacing                                    = 1;
+      # pattern1
+      # dl_UL_TransmissionPeriodicity
+      # 0=ms0p5, 1=ms0p625, 2=ms1, 3=ms1p25, 4=ms2, 5=ms2p5, 6=ms5, 7=ms10
+      dl_UL_TransmissionPeriodicity                                 = 6;
+      nrofDownlinkSlots                                             = 7;
+      nrofDownlinkSymbols                                           = 6;
+      nrofUplinkSlots                                               = 2;
+      nrofUplinkSymbols                                             = 4;
+
+      ssPBCH_BlockPower                                             = -25;
+  }
+
+  );
+
+
+    # ------- SCTP definitions
+    SCTP :
+    {
+        # Number of streams to use in input/output
+        SCTP_INSTREAMS  = 2;
+        SCTP_OUTSTREAMS = 2;
+    };
+
+
+    ////////// AMF parameters:
+    amf_ip_address = ({ ipv4 = "192.168.71.132"; });
+
+
+    NETWORK_INTERFACES :
+    {
+        GNB_IPV4_ADDRESS_FOR_NG_AMF              = "192.168.71.140/24";
+        GNB_IPV4_ADDRESS_FOR_NGU                 = "192.168.71.140/24";
+        GNB_PORT_FOR_S1U                         = 2152; # Spec 2152
+    };
+
+  }
+);
+
+MACRLCs = (
+{
+  tr_s_preference             = "local_L1";
+  tr_n_preference             = "local_RRC";
+  pusch_TargetSNRx10          = 150;
+  pucch_TargetSNRx10          = 200;
+}
+);
+
+L1s = (
+{
+  tr_n_preference       = "local_mac";
+  prach_dtx_threshold   = 120;
+  pucch0_dtx_threshold  = 100;
+  ofdm_offset_divisor   = 8; #set this to UINT_MAX for offset 0
+}
+);
+
+RUs = (
+{
+  local_rf       = "yes"
+  nb_tx          = 1
+  nb_rx          = 1
+  att_tx         = 12;
+  att_rx         = 12;
+  bands          = [78];
+  max_pdschReferenceSignalPower = -27;
+  max_rxgain                    = 114;
+  eNB_instances  = [0];
+  clock_src = "internal";
+}
+);
+
+rfsimulator :
+{
+  serveraddr = "server";
+  serverport = 4043;
+  options = (); #("saviq"); or/and "chanmod"
+  modelname = "AWGN";
+  IQfile = "/tmp/rfsimulator.iqs";
+};
+
+security = {
+  # preferred ciphering algorithms
+  # the first one of the list that an UE supports in chosen
+  # valid values: nea0, nea1, nea2, nea3
+  ciphering_algorithms = ( "nea0" );
+
+  # preferred integrity algorithms
+  # the first one of the list that an UE supports in chosen
+  # valid values: nia0, nia1, nia2, nia3
+  integrity_algorithms = ( "nia2", "nia0" );
+
+  # setting 'drb_ciphering' to "no" disables ciphering for DRBs, no matter
+  # what 'ciphering_algorithms' configures; same thing for 'drb_integrity'
+  drb_ciphering = "yes";
+  drb_integrity = "no";
+};
+
+log_config :
+{
+  global_log_level                      ="info";
+  hw_log_level                          ="info";
+  phy_log_level                         ="info";
+  mac_log_level                         ="info";
+  rlc_log_level                         ="info";
+  pdcp_log_level                        ="info";
+  rrc_log_level                         ="info";
+  ngap_log_level                        ="debug";
+  f1ap_log_level                        ="debug";
+};
+
+e2_agent = {
+  near_ric_ip_addr = "127.0.0.1";
+  #sm_dir = "/path/where/the/SMs/are/located/"
+  sm_dir = "/usr/local/lib/flexric/"
+};

ci-scripts/xml_files/monolithic_2step_ra_gnb_rfsim.xml

@@ -0,0 +1,85 @@
+<!-- SPDX-License-Identifier: LicenseRef-CSSL-1.0 -->
+
+<testCaseList>
+    <htmlTabRef>monolithic_2step_ra_gnb_rfsim</htmlTabRef>
+    <htmlTabName>Monolithic 2-Step RA gNB rfsim</htmlTabName>
+    <htmlTabIcon>wrench</htmlTabIcon>
+
+    <testCase>
+        <class>Pull_Local_Registry</class>
+        <desc>Pull Images from Local Registry</desc>
+        <node>localhost</node>
+        <images>oai-gnb-asan oai-nr-ue-asan</images>
+    </testCase>
+
+    <testCase>
+        <class>Create_Workspace</class>
+        <desc>Create new Workspace</desc>
+        <node>localhost</node>
+    </testCase>
+
+    <testCase>
+        <class>Deploy_Object</class>
+        <desc>Deploy OAI gNB</desc>
+        <node>localhost</node>
+        <yaml_path>ci-scripts/yaml_files/monolithic_2step_ra_gnb_rfsim</yaml_path>
+        <services>mysql oai-amf oai-smf oai-upf oai-ext-dn</services>
+    </testCase>
+
+    <testCase>
+        <class>Deploy_Object</class>
+        <desc>Deploy OAI NR-UE</desc>
+        <node>localhost</node>
+        <yaml_path>ci-scripts/yaml_files/monolithic_2step_ra_gnb_rfsim</yaml_path>
+        <services>oai-gnb oai-nr-ue</services>
+    </testCase>
+
+    <testCase>
+        <class>Attach_UE</class>
+        <desc>Attach OAI UE (Wait for IP)</desc>
+        <id>rfsim5g_ue</id>
+        <node>localhost</node>
+    </testCase>
+
+    <testCase>
+        <class>Ping</class>
+        <desc>Ping ext-dn from NR-UE</desc>
+        <id>rfsim5g_ue</id>
+        <node>localhost</node>
+        <svr_id>rfsim5g_ext_dn</svr_id>
+        <svr_node>localhost</svr_node>
+        <ping_args>-c 20 -i0.2</ping_args>
+        <ping_packetloss_threshold>0</ping_packetloss_threshold>
+    </testCase>
+
+    <testCase>
+        <class>Ping</class>
+        <desc>Ping NR-UE from ext-dn</desc>
+        <id>rfsim5g_ext_dn</id>
+        <node>localhost</node>
+        <svr_id>rfsim5g_ue</svr_id>
+        <svr_node>localhost</svr_node>
+        <ping_args>-c 20 -i0.2</ping_args>
+        <ping_packetloss_threshold>0</ping_packetloss_threshold>
+    </testCase>
+
+    <testCase>
+        <class>Undeploy_Object</class>
+        <always_exec>true</always_exec>
+        <desc>Undeploy all OAI 5G stack</desc>
+        <node>localhost</node>
+        <yaml_path>ci-scripts/yaml_files/monolithic_2step_ra_gnb_rfsim</yaml_path>
+        <analysis>
+            <services>oai-gnb=RetxCheck=10,0,0,0 oai-gnb=EndsWithBye oai-nr-ue</services>
+        </analysis>
+    </testCase>
+
+    <testCase>
+        <class>Clean_Test_Server_Images</class>
+        <always_exec>true</always_exec>
+        <desc>Clean Test Images on Test Server</desc>
+        <node>localhost</node>
+        <images>oai-gnb-asan oai-nr-ue-asan</images>
+    </testCase>
+
+</testCaseList>

ci-scripts/yaml_files/monolithic_2step_ra_gnb_rfsim/docker-compose.yaml

@@ -0,0 +1,162 @@
+# SPDX-License-Identifier: MIT
+
+services:
+    mysql:
+        container_name: "rfsim5g-mysql"
+        image: mysql:9.6
+        init: true
+        volumes:
+            - ../5g_rfsimulator/oai_db.sql:/docker-entrypoint-initdb.d/oai_db.sql
+            - ../5g_rfsimulator/mysql-healthcheck.sh:/tmp/mysql-healthcheck.sh
+        environment:
+            - TZ=Europe/Paris
+            - MYSQL_DATABASE=oai_db
+            - MYSQL_USER=test
+            - MYSQL_PASSWORD=test
+            - MYSQL_ROOT_PASSWORD=linux
+        healthcheck:
+            test: /bin/bash -c "/tmp/mysql-healthcheck.sh"
+            start_period: 10s
+            start_interval: 500ms
+            interval: 10s
+            timeout: 5s
+            retries: 30
+        networks:
+            public_net:
+                ipv4_address: 192.168.71.131
+    oai-amf:
+        container_name: "rfsim5g-oai-amf"
+        image: oaisoftwarealliance/oai-amf:v2.2.1
+        environment:
+            - TZ=Europe/paris
+        volumes:
+            - ../5g_rfsimulator/mini_nonrf_config.yaml:/openair-amf/etc/config.yaml
+        depends_on:
+            - mysql
+        networks:
+            public_net:
+                ipv4_address: 192.168.71.132
+    oai-smf:
+        container_name: "rfsim5g-oai-smf"
+        image: oaisoftwarealliance/oai-smf:v2.2.1
+        environment:
+            - TZ=Europe/Paris
+        volumes:
+            - ../5g_rfsimulator/mini_nonrf_config.yaml:/openair-smf/etc/config.yaml
+        depends_on:
+            - oai-amf
+        networks:
+            public_net:
+                ipv4_address: 192.168.71.133
+    oai-upf:
+        container_name: "rfsim5g-oai-upf"
+        image: oaisoftwarealliance/oai-upf:v2.2.1
+        init: true
+        environment:
+            - TZ=Europe/Paris
+        volumes:
+            - ../5g_rfsimulator/mini_nonrf_config.yaml:/openair-upf/etc/config.yaml
+        depends_on:
+            - oai-smf
+        cap_add:
+            - NET_ADMIN
+            - SYS_ADMIN
+        cap_drop:
+            - ALL
+        privileged: true
+        networks:
+            public_net:
+                ipv4_address: 192.168.71.134
+                interface_name: eth0
+            traffic_net:
+                ipv4_address: 192.168.72.134
+                interface_name: eth1
+    oai-ext-dn:
+        privileged: true
+        container_name: rfsim5g-oai-ext-dn
+        image: oaisoftwarealliance/trf-gen-cn5g:latest
+        init: true
+        entrypoint: /bin/bash -c \
+            "iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE;"\
+            "ip route add 12.1.1.0/24 via 192.168.72.134 dev eth0; sleep infinity"
+        depends_on:
+            - oai-upf
+        networks:
+            traffic_net:
+                ipv4_address: 192.168.72.135
+        healthcheck:
+            test: /bin/bash -c "ping -c 2 192.168.72.134"
+            start_period: 10s
+            start_interval: 500ms
+            interval: 10s
+            timeout: 5s
+            retries: 5
+
+    oai-gnb:
+        image: ${REGISTRY-oaisoftwarealliance/}${GNB_IMG:-oai-gnb}:${TAG:-develop}
+        container_name: rfsim5g-oai-gnb
+        cap_drop:
+            - ALL
+        environment:
+            USE_ADDITIONAL_OPTIONS: --rfsim --log_config.global_log_options level,nocolor,time
+            ASAN_OPTIONS: detect_leaks=0
+        networks:
+            public_net:
+                ipv4_address: 192.168.71.140
+        volumes:
+            - ../../conf_files/gnb.sa.band78.106prb.usrpb210.RA_2-Step.conf:/opt/oai-gnb/etc/gnb.conf
+        healthcheck:
+            test: /bin/bash -c "pgrep nr-softmodem"
+            start_period: 10s
+            start_interval: 500ms
+            interval: 10s
+            timeout: 5s
+            retries: 5
+
+    oai-nr-ue:
+        image: ${REGISTRY-oaisoftwarealliance/}${NRUE_IMG:-oai-nr-ue}:${TAG:-develop}
+        container_name: rfsim5g-oai-nr-ue
+        cap_drop:
+            - ALL
+        cap_add:
+            - NET_ADMIN  # for interface bringup
+            - NET_RAW    # for ping
+        environment:
+            USE_ADDITIONAL_OPTIONS: --rfsim
+                --rfsimulator.[0].serveraddr 192.168.71.140 --log_config.global_log_options level,nocolor,time
+                -C 3619200000 -r 106 --numerology 1 --ssb 516 --band 78
+            ASAN_OPTIONS: detect_leaks=0
+        devices:
+            - /dev/net/tun:/dev/net/tun
+        volumes:
+            - ../../conf_files/nrue.uicc.conf:/opt/oai-nr-ue/etc/nr-ue.conf
+        depends_on:
+            - oai-gnb
+        networks:
+            public_net:
+                ipv4_address: 192.168.71.150
+        healthcheck:
+            test: /bin/bash -c "pgrep nr-uesoftmodem"
+            start_period: 10s
+            start_interval: 500ms
+            interval: 10s
+            timeout: 5s
+            retries: 5
+
+networks:
+    public_net:
+        driver: bridge
+        name: rfsim5g-oai-public-net
+        ipam:
+            config:
+                - subnet: 192.168.71.128/26
+        driver_opts:
+            com.docker.network.bridge.name: "rfsim5g-public"
+    traffic_net:
+        driver: bridge
+        name: rfsim5g-oai-traffic-net
+        ipam:
+            config:
+                - subnet: 192.168.72.128/26
+        driver_opts:
+            com.docker.network.bridge.name: "rfsim5g-traffic"

executables/nr-oru.c

@@ -1,23 +1,7 @@
 /*
- * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The OpenAirInterface Software Alliance licenses this file to You under
- * the OAI Public License, Version 1.1  (the "License"); you may not use this file
- * except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.openairinterface.org/?page_id=698
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *-------------------------------------------------------------------------------
- * For more information about the OpenAirInterface (OAI) Software Alliance:
- *      contact@openairinterface.org
+ * SPDX-License-Identifier: LicenseRef-CSSL-1.0
  */
+
 #include "common/config/config_userapi.h"
 #include "common/utils/system.h"
 #include "nr-oru.h"

executables/nr-oru.h

@@ -1,23 +1,7 @@
 /*
- * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The OpenAirInterface Software Alliance licenses this file to You under
- * the OAI Public License, Version 1.1  (the "License"); you may not use this file
- * except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.openairinterface.org/?page_id=698
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *-------------------------------------------------------------------------------
- * For more information about the OpenAirInterface (OAI) Software Alliance:
- *      contact@openairinterface.org
+ * SPDX-License-Identifier: LicenseRef-CSSL-1.0
  */
+
 #ifndef __NR_ORU_H__
 #define __NR_ORU_H__
 #include "openair1/PHY/defs_RU.h"

openair2/LAYER2/NR_MAC_UE/nr_ra_procedures.c

@@ -287,7 +287,8 @@ static void config_preamble_index(NR_UE_MAC_INST_t *mac)
     // The field is mandatory present if the 2-step random access type occasions are shared with 4-step random access type,
     // otherwise the field is not present
     bool sharedROs = twostep->msgA_CB_PreamblesPerSSB_PerSharedRO_r16 != NULL;
-    AssertFatal(sharedROs == false, "Shared ROs between 2- and 4-step RA not supported\n");
+    if (!sharedROs)
+      LOG_E(NR_MAC, "Shared ROs between 2- and 4-step RA not supported\n");
 
     // For Type-2 random access procedure with separate configuration of PRACH occasions with Type-1 random access procedure
     // configuration by msgA-SSB-PerRACH-OccasionAndCB-PreamblesPerSSB when provided;
@@ -1157,12 +1158,15 @@ void nr_ra_contention_resolution_failed(NR_UE_MAC_INST_t *mac)
 
 void nr_rar_not_successful(NR_UE_MAC_INST_t *mac)
 {
-  LOG_W(MAC, "[UE %d] RAR reception failed\n", mac->ue_id);
   RA_config_t *ra = &mac->ra;
+  LOG_W(MAC, "[UE %d] Response window timer expired, %s reception failed\n", mac->ue_id, ra->ra_type == RA_2_STEP ? "MsgB" : "RAR");
   NR_PRACH_RESOURCES_t *prach_resources = &ra->prach_resources;
   prach_resources->preamble_tx_counter++;
   bool ra_completed = false;
   if (prach_resources->preamble_tx_counter == ra->preambleTransMax + 1) {
+    if (ra->ra_type == RA_2_STEP) {
+      AssertFatal(false, "Fallback to 4-Step RA not implemented\n");
+    }
     // if the Random Access Preamble is transmitted on the SpCell
     // TODO to be verified, this means SA if I'm not mistaken
     if (IS_SA_MODE(get_softmodem_params())) {

openair2/LAYER2/NR_MAC_UE/nr_ue_scheduler.c

@@ -1677,6 +1677,23 @@ static void nr_ue_prach_scheduler(NR_UE_MAC_INST_t *mac, frame_t frameP, slot_t
         ra->t_crnti = 0;
         mac->crnti = 0;
         ra->ra_rnti = 0;
+
+        // start MsgB response window timer
+        int next_slot = (slotP + 1) % n_slots_frame;
+        int next_frame = (frameP + (next_slot < slotP)) % MAX_FRAME_NUMBER;
+        int add_slots = 1;
+        NR_BWP_PDCCH_t *pdcch_config = &mac->config_BWP_PDCCH[mac->current_DL_BWP->bwp_id];
+        const NR_SearchSpace_t *ra_SS = get_common_search_space(mac, pdcch_config->ra_SS_id);
+        while (!is_dl_slot(next_slot, &mac->frame_structure)
+               || !is_ss_monitor_occasion(next_frame, next_slot, n_slots_frame, ra_SS)) {
+          int temp_slot = (next_slot + 1) % n_slots_frame;
+          next_frame = (next_frame + (temp_slot < next_slot)) % MAX_FRAME_NUMBER;
+          next_slot = temp_slot;
+          add_slots++;
+        }
+        add_slots += GET_DURATION_RX_TO_TX(&mac->phy_config.config_req.ntn_config, mac->current_DL_BWP->scs);
+        nr_timer_setup(&ra->response_window_timer, ra->response_window_setup_time + add_slots, 1);
+        nr_timer_start(&ra->response_window_timer);
       } else {
         AssertFatal(false, "RA type %d not implemented!\n", ra->ra_type);
       }

openair2/LAYER2/NR_MAC_gNB/config.c

@@ -941,7 +941,19 @@ void nr_mac_config_scc(gNB_MAC_INST *nrmac, NR_ServingCellConfigCommon_t *scc, c
 
   const int NTN_gNB_Koffset = get_NTN_Koffset(scc);
   const int n = get_slots_per_frame_from_scs(*scc->ssbSubcarrierSpacing);
-  const int size = n << (int)ceil(log2((NTN_gNB_Koffset + 13) / n + 1)); // 13 is upper limit for max_fb_time
+  int size = n << (int)ceil(log2((NTN_gNB_Koffset + 13) / n + 1)); // 13 is upper limit for max_fb_time
+
+  // If the RA is configured as 2-step, the size must be increased to accommodate more frames. This allows MsgA-PUSCH and the
+  // ACK/NACK to be scheduled within the same slot, as they reside in different frames. Consequently, multiple MsgA-PUSCH
+  // transmissions can be scheduled without overriding the ACK/NACK.
+  if (scc->uplinkConfigCommon->initialUplinkBWP->ext1
+      && scc->uplinkConfigCommon->initialUplinkBWP->ext1->msgA_ConfigCommon_r16->choice.setup->msgA_PUSCH_Config_r16
+             ->msgA_PUSCH_ResourceGroupA_r16->msgA_PUSCH_TimeDomainOffset_r16) {
+    NR_MsgA_ConfigCommon_r16_t *msgacc = scc->uplinkConfigCommon->initialUplinkBWP->ext1->msgA_ConfigCommon_r16->choice.setup;
+    int msgA_PUSCH_TimeDomainOffset = msgacc->msgA_PUSCH_Config_r16->msgA_PUSCH_ResourceGroupA_r16->msgA_PUSCH_TimeDomainOffset_r16;
+    size *= (n + msgA_PUSCH_TimeDomainOffset + (n - 1)) / n;
+  }
+
   nrmac->vrb_map_UL_size = size;
 
   int num_beams = 1;

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c

@@ -476,7 +476,6 @@ void schedule_nr_prach(module_id_t module_idP, frame_t frameP, slot_t slotP)
               }
             }
             if (initialUplinkBWP->ext1 && initialUplinkBWP->ext1->msgA_ConfigCommon_r16) {
-              if (gNB->UE_info.connected_ue_list[0] == NULL)
               schedule_nr_MsgA_pusch(scc->uplinkConfigCommon,
                                      gNB,
                                      module_idP,

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -2607,6 +2607,10 @@ NR_UE_info_t *find_nr_UE(NR_UEs_t *UEs, rnti_t rntiP)
 NR_UE_info_t *find_ra_UE(NR_UEs_t *UEs, rnti_t rntiP)
 {
   UE_iterator(UEs->access_ue_list, UE) {
+    if (UE->ra->ra_type == RA_2_STEP && UE->ra->RA_rnti == rntiP) {
+      LOG_D(NR_MAC, "Search and found RA 2-Step RA_rnti: %04x\n", rntiP);
+      return UE;
+    }
     if (UE->rnti == rntiP) {
       LOG_D(NR_MAC,"Search and found rnti: %04x\n", rntiP);
       return UE;

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c

@@ -702,6 +702,18 @@ static void handle_nr_ul_harq(gNB_MAC_INST *nrmac, NR_UE_info_t *UE, rnti_t rnti
 
 static void handle_msg3_failed_rx(gNB_MAC_INST *mac, NR_RA_t *ra, rnti_t rnti, int harq_round_max)
 {
+  // for CFRA (NSA) do not schedule retransmission of msg3
+  // For RA 2-Step consider RA failed if MsgA-PUSCH not detected
+  if (ra->cfra || ra->ra_type == RA_2_STEP) {
+    LOG_W(NR_MAC,
+          "UE %04x RA failed at state %s (%s reception failed)\n",
+          rnti,
+          nrra_text[ra->ra_state],
+          ra->ra_type == RA_2_STEP ? "MsgA-PUSCH" : "NSA Msg3");
+    nr_release_ra_UE(mac, rnti);
+    return;
+  }
+
   if (ra->msg3_round >= harq_round_max - 1) {
     LOG_W(NR_MAC, "UE %04x RA failed at state %s (Reached msg3 max harq rounds)\n", rnti, nrra_text[ra->ra_state]);
     nr_release_ra_UE(mac, rnti);
@@ -729,7 +741,7 @@ static void nr_rx_ra_sdu(const module_id_t mod_id,
   NR_ServingCellConfigCommon_t *scc = mac->common_channels[0].ServingCellConfigCommon;
   NR_UE_info_t *UE = find_ra_UE(&mac->UE_info, rnti);
   if (!UE) {
-    LOG_E(NR_MAC, "UL SDU discarded. Couldn't finde UE with RNTI %04x \n", rnti);
+    LOG_D(NR_MAC, "UL SDU discarded. Couldn't find UE with RNTI %04x \n", rnti);
     return;
   }
 
@@ -773,16 +785,19 @@ static void nr_rx_ra_sdu(const module_id_t mod_id,
     if (cfra)  // no Msg3 on CFRA, no problem
       return;
 
-    if (ra->ra_state != nrRA_WAIT_Msg3)
+    if (ra->ra_type == RA_4_STEP && ra->ra_state != nrRA_WAIT_Msg3)
       return;
 
-    if((frame!=ra->Msg3_frame) || (slot!=ra->Msg3_slot))
+    if (ra->ra_type == RA_2_STEP && ra->ra_state != nrRA_WAIT_MsgA_PUSCH)
+      return;
+
+    if (ra->ra_type == RA_4_STEP && ((frame != ra->Msg3_frame) || (slot != ra->Msg3_slot)))
       return;
 
     if (ul_cqi != 0xff)
       ra->msg3_TPC = nr_mac_get_tpc(&UE->UE_sched_ctrl.pusch_pc);
 
-    handle_msg3_failed_rx(mac, ra, rnti, mac->ul_bler.harq_round_max);
+    handle_msg3_failed_rx(mac, ra, UE->rnti, mac->ul_bler.harq_round_max);
     return;
   }
 
@@ -801,15 +816,15 @@ static void nr_rx_ra_sdu(const module_id_t mod_id,
 
 
   if (no_sig) {
-    LOG_W(NR_MAC, "MSG3 ULSCH with no signal\n");
+    LOG_W(NR_MAC, "%s ULSCH with no signal\n", ra->ra_type == RA_2_STEP ? "MsgA-PUSCH" : "MSG3");
     if (!cfra)
-      handle_msg3_failed_rx(mac, ra, rnti, mac->ul_bler.harq_round_max);
+      handle_msg3_failed_rx(mac, ra, UE->rnti, mac->ul_bler.harq_round_max);
     return;
   }
   if (!cfra && ra->ra_type == RA_2_STEP) {
     // random access pusch with RA-RNTI
     if (ra->RA_rnti != rnti) {
-      LOG_E(NR_MAC, "expected TC_RNTI %04x to match current RNTI %04x\n", ra->RA_rnti, rnti);
+      LOG_E(NR_MAC, "expected RA_RNTI %04x to match current RNTI %04x\n", ra->RA_rnti, rnti);
       return;
     }
   }
@@ -817,7 +832,7 @@ static void nr_rx_ra_sdu(const module_id_t mod_id,
   // re-initialize ta update variables after RA procedure completion
   UE->UE_sched_ctrl.ta_frame = (frame + 100) % MAX_FRAME_NUMBER;
 
-  LOG_A(NR_MAC, "%4d.%2d PUSCH with TC_RNTI 0x%04x received correctly\n", frame, slot, rnti);
+  LOG_A(NR_MAC, "%4d.%2d PUSCH with %s 0x%04x received correctly\n", frame, slot, ra->ra_type == RA_2_STEP ? "RA_RNTI" : "TC_RNTI", rnti);
 
   NR_UE_sched_ctrl_t *UE_scheduling_control = &UE->UE_sched_ctrl;
   DevAssert(harq_pid >= 0 && harq_pid < 8);
@@ -884,9 +899,10 @@ static void nr_rx_ra_sdu(const module_id_t mod_id,
   nr_process_mac_pdu(mod_id, UE, frame, slot, sdu, sdu_len, harq_pid);
 
   LOG_I(NR_MAC,
-        "Activating scheduling %s for TC_RNTI 0x%04x (state %s)\n",
+        "Activating scheduling %s for %s 0x%04x (state %s)\n",
         ra->ra_type == RA_2_STEP ? "MsgB" : "Msg4",
-        UE->rnti,
+        ra->ra_type == RA_2_STEP ? "MsgB_rnti" : "TC_RNTI",
+        ra->ra_type == RA_2_STEP ? UE->ra->MsgB_rnti : UE->rnti,
         nrra_text[ra->ra_state]);
   ra->ra_state = ra->ra_type == RA_2_STEP ? nrRA_MsgB : nrRA_Msg4;
   LOG_D(NR_MAC, "TC_RNTI 0x%04x next RA state %s\n", UE->rnti, nrra_text[ra->ra_state]);

targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.106PRB.usrpb210.RA_2-Step.conf

@@ -70,7 +70,7 @@ gNBs =
         initialULBWPsubcarrierSpacing                               = 1;
       #rach-ConfigCommon
         #rach-ConfigGeneric
-          prach_ConfigurationIndex                                  = 98;
+          prach_ConfigurationIndex                                  = 148;
 #prach_msg1_FDM
 #0 = one, 1=two, 2=four, 3=eight
           prach_msg1_FDM                                            = 0;
@@ -106,7 +106,7 @@ gNBs =
         p0_NominalWithGrant                                         =-90;
 
         # 0=sl1, 1=sl2, 2=sl4, 3=sl8, 4=sl10, 5=sl20, 6=sl40, 7=sl80, 8=sl160, 9=sl320
-        msgB_ResponseWindow_r16                                     = 2;
+        msgB_ResponseWindow_r16                                     = 6;
         msgA_RSRP_Threshold_r16                                     = 19;
 
         msgA_CB_PreamblesPerSSB_PerSharedRO_r16                      = 1;