added srsue::rrc_nr

srsenb/hdr/stack/upper/common_enb.h

@@ -37,7 +37,7 @@ namespace srsenb {
 #define SRSENB_N_DRB 8
 #define SRSENB_N_RADIO_BEARERS 11
 
-typedef enum {
+enum rb_id_t {
   RB_ID_SRB0 = 0,
   RB_ID_SRB1,
   RB_ID_SRB2,
@@ -50,8 +50,8 @@ typedef enum {
   RB_ID_DRB7,
   RB_ID_DRB8,
   RB_ID_N_ITEMS,
-} rb_id_t;
-static const char rb_id_text[RB_ID_N_ITEMS][20] =
+};
+static const char* rb_id_text[] =
     {"SRB0", "SRB1", "SRB2", "DRB1", "DRB2", "DRB3", "DRB4", "DRB5", "DRB6", "DRB7", "DRB8"};
 
 // Cat 3 UE - Max number of DL-SCH transport block bits received within a TTI
@@ -59,6 +59,7 @@ static const char rb_id_text[RB_ID_N_ITEMS][20] =
 #define SRSENB_MAX_BUFFER_SIZE_BITS 102048
 #define SRSENB_MAX_BUFFER_SIZE_BYTES 12756
 #define SRSENB_BUFFER_HEADER_OFFSET 1024
+
 } // namespace srsenb
 
 #endif // SRSENB_COMMON_ENB_H

srsenb/src/stack/rrc/CMakeLists.txt

@@ -20,3 +20,4 @@
 
 set(SOURCES rrc.cc rrc_ue.cc rrc_mobility.cc rrc_cell_cfg.cc rrc_bearer_cfg.cc)
 add_library(srsenb_rrc STATIC ${SOURCES})
+

srsue/hdr/stack/rrc/rrc_nr.h

@@ -0,0 +1,154 @@
+/*
+ * Copyright 2013-2020 Software Radio Systems Limited
+ *
+ * This file is part of srsLTE.
+ *
+ * srsLTE is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * srsLTE is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * A copy of the GNU Affero General Public License can be found in
+ * the LICENSE file in the top-level directory of this distribution
+ * and at http://www.gnu.org/licenses/.
+ *
+ */
+
+#ifndef SRSUE_RRC_NR_H
+#define SRSUE_RRC_NR_H
+
+#include "srslte/asn1/rrc_nr_asn1.h"
+#include "srslte/common/block_queue.h"
+#include "srslte/common/buffer_pool.h"
+#include "srslte/interfaces/ue_interfaces.h"
+#include "srslte/interfaces/ue_nr_interfaces.h"
+#include "srsue/hdr/stack/upper/gw.h"
+
+namespace srsue {
+
+// Expert arguments to create GW without proper RRC
+struct core_less_args_t {
+  std::string      ip_addr;
+  srsue::gw_args_t gw_args;
+  uint8_t          drb_lcid;
+};
+
+struct rrc_nr_args_t {
+  core_less_args_t coreless;
+  std::string      log_level;
+  uint32_t         log_hex_limit;
+};
+
+struct rrc_nr_metrics_t {};
+
+class rrc_nr : public rrc_interface_phy_nr,
+               public rrc_interface_pdcp,
+               public rrc_interface_rlc,
+               public srslte::timer_callback
+{
+public:
+  rrc_nr();
+  ~rrc_nr();
+
+  void init(phy_interface_rrc_nr*  phy_,
+            mac_interface_rrc_nr*  mac_,
+            rlc_interface_rrc*     rlc_,
+            pdcp_interface_rrc*    pdcp_,
+            gw_interface_rrc*      gw_,
+            srslte::timer_handler* timers_,
+            stack_interface_rrc*   stack_,
+            const rrc_nr_args_t&   args_);
+
+  void stop();
+
+  void get_metrics(rrc_nr_metrics_t& m);
+
+  // Timeout callback interface
+  void timer_expired(uint32_t timeout_id) final;
+  void srslte_rrc_log(const char* str);
+
+  enum direction_t { Rx = 0, Tx };
+  template <class T>
+  void log_rrc_message(const std::string& source, direction_t dir, const srslte::byte_buffer_t* pdu, const T& msg);
+
+  // PHY interface
+  void in_sync() final;
+  void out_of_sync() final;
+
+  // MAC interface
+  void run_tti(uint32_t tti) final;
+
+  // RLC interface
+  void max_retx_attempted() final;
+
+  // PDCP interface
+  void write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu) final;
+  void write_pdu_bcch_bch(srslte::unique_byte_buffer_t pdu) final;
+  void write_pdu_bcch_dlsch(srslte::unique_byte_buffer_t pdu) final;
+  void write_pdu_pcch(srslte::unique_byte_buffer_t pdu) final;
+  void write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t pdu) final;
+
+  // STACK interface
+  void cell_search_completed(const phy_interface_rrc_lte::cell_search_ret_t& cs_ret,
+                             const phy_interface_rrc_lte::phy_cell_t&        found_cell);
+
+private:
+  struct cmd_msg_t {
+    enum { PDU, PCCH, PDU_MCH, RLF, PDU_BCCH_DLSCH, STOP } command;
+    srslte::unique_byte_buffer_t pdu;
+    uint16_t                     lcid;
+  };
+
+  bool                           running = false;
+  srslte::block_queue<cmd_msg_t> cmd_q;
+
+  srslte::byte_buffer_pool* pool  = nullptr;
+  phy_interface_rrc_nr*     phy   = nullptr;
+  mac_interface_rrc*        mac   = nullptr;
+  rlc_interface_rrc*        rlc   = nullptr;
+  pdcp_interface_rrc*       pdcp  = nullptr;
+  gw_interface_rrc*         gw    = nullptr;
+  stack_interface_rrc*      stack = nullptr;
+
+  srslte::log_ref log_h;
+
+  /// RRC states (3GPP 38.331 v15.5.1 Sec 4.2.1)
+  enum rrc_nr_state_t {
+    RRC_NR_STATE_IDLE = 0,
+    RRC_NR_STATE_CONNECTED,
+    RRC_NR_STATE_CONNECTED_INACTIVE,
+    RRC_NR_STATE_N_ITEMS,
+  };
+  const static char* rrc_nr_state_text[RRC_NR_STATE_N_ITEMS];
+
+  rrc_nr_state_t state = RRC_NR_STATE_IDLE, last_state = RRC_NR_STATE_IDLE;
+  uint8_t        transaction_id = 0;
+
+  rrc_nr_args_t args = {};
+
+  // RRC constants and timers
+  srslte::timer_handler* timers = nullptr;
+
+  // Radio bearers
+  std::map<int, std::string> rb_id_t = {{0, "SRB0"}, {1, "SRB1"}, {2, "SRB2"}, {3, "SRB3"}, {4, "DRB1"}};
+
+  std::string get_rb_name(uint32_t lcid) final
+  {
+    if (lcid < rb_id_t.size()) {
+      return rb_id_t.at(lcid);
+    } else {
+      return "INVALID_RB";
+    }
+  }
+
+  bool initiated = false;
+};
+
+} // namespace srsue
+
+#endif // SRSUE_RRC_NR_H

srsue/src/stack/rrc/CMakeLists.txt

@@ -19,4 +19,9 @@
 #
 
 set(SOURCES rrc.cc rrc_procedures.cc rrc_meas.cc)
-add_library(srsue_rrc STATIC ${SOURCES})
+add_library(srsue_rrc STATIC ${SOURCES})
+
+if(ENABLE_5GNR)
+    set(SOURCES rrc_nr.cc)
+    add_library(srsgnb_rrc STATIC ${SOURCES})
+endif()

srsue/src/stack/rrc/rrc_nr.cc

@@ -0,0 +1,101 @@
+/*
+ * Copyright 2013-2020 Software Radio Systems Limited
+ *
+ * This file is part of srsLTE.
+ *
+ * srsLTE is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * srsLTE is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * A copy of the GNU Affero General Public License can be found in
+ * the LICENSE file in the top-level directory of this distribution
+ * and at http://www.gnu.org/licenses/.
+ *
+ */
+
+#include "srsue/hdr/stack/rrc/rrc_nr.h"
+
+using namespace asn1::rrc_nr;
+
+namespace srsue {
+
+const char* rrc_nr::rrc_nr_state_text[] = {"IDLE", "CONNECTED", "CONNECTED-INACTIVE"};
+
+rrc_nr::rrc_nr() : log_h("RRC") {}
+
+rrc_nr::~rrc_nr() = default;
+
+void rrc_nr::init(phy_interface_rrc_nr*  phy_,
+                  mac_interface_rrc_nr*  mac_,
+                  rlc_interface_rrc*     rlc_,
+                  pdcp_interface_rrc*    pdcp_,
+                  gw_interface_rrc*      gw_,
+                  srslte::timer_handler* timers_,
+                  stack_interface_rrc*   stack_,
+                  const rrc_nr_args_t&   args_)
+{
+  phy    = phy_;
+  rlc    = rlc_;
+  pdcp   = pdcp_;
+  gw     = gw_;
+  timers = timers_;
+  stack  = stack_;
+  args   = args_;
+
+  log_h->info("Creating dummy DRB on LCID=%d\n", args.coreless.drb_lcid);
+  srslte::rlc_config_t rlc_cnfg = srslte::rlc_config_t::default_rlc_um_nr_config(6);
+  rlc->add_bearer(args.coreless.drb_lcid, rlc_cnfg);
+
+  srslte::pdcp_config_t pdcp_cnfg{args.coreless.drb_lcid,
+                                  srslte::PDCP_RB_IS_DRB,
+                                  srslte::SECURITY_DIRECTION_DOWNLINK,
+                                  srslte::SECURITY_DIRECTION_UPLINK,
+                                  srslte::PDCP_SN_LEN_18,
+                                  srslte::pdcp_t_reordering_t::ms500,
+                                  srslte::pdcp_discard_timer_t ::ms100};
+
+  pdcp->add_bearer(args.coreless.drb_lcid, pdcp_cnfg);
+}
+
+void rrc_nr::stop() {}
+
+void rrc_nr::get_metrics(rrc_nr_metrics_t& m) {}
+
+// Timeout callback interface
+void rrc_nr::timer_expired(uint32_t timeout_id) {}
+
+void rrc_nr::srslte_rrc_log(const char* str) {}
+
+template <class T>
+void rrc_nr::log_rrc_message(const std::string& source, direction_t dir, const srslte::byte_buffer_t* pdu, const T& msg)
+{}
+
+// PHY interface
+void rrc_nr::in_sync() {}
+void rrc_nr::out_of_sync() {}
+
+// MAC interface
+void rrc_nr::run_tti(uint32_t tti) {}
+
+// PDCP interface
+void rrc_nr::write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu) {}
+void rrc_nr::write_pdu_bcch_bch(srslte::unique_byte_buffer_t pdu) {}
+void rrc_nr::write_pdu_bcch_dlsch(srslte::unique_byte_buffer_t pdu) {}
+void rrc_nr::write_pdu_pcch(srslte::unique_byte_buffer_t pdu) {}
+void rrc_nr::write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t pdu) {}
+
+// RLC interface
+void rrc_nr::max_retx_attempted() {}
+
+// STACK interface
+void rrc_nr::cell_search_completed(const phy_interface_rrc_lte::cell_search_ret_t& cs_ret,
+                                   const phy_interface_rrc_lte::phy_cell_t&        found_cell)
+{}
+
+} // namespace srsue