/* * 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/. * */ /****************************************************************************** * File: interfaces.h * Description: Abstract base class interfaces provided by layers * to other layers. *****************************************************************************/ #ifndef SRSLTE_UE_INTERFACES_H #define SRSLTE_UE_INTERFACES_H #include #include #include "rrc_interface_types.h" #include "srslte/asn1/liblte_mme.h" #include "srslte/common/common.h" #include "srslte/common/interfaces_common.h" #include "srslte/common/security.h" #include "srslte/common/stack_procedure.h" #include "srslte/interfaces/rrc_interface_types.h" #include "srslte/phy/channel/channel.h" #include "srslte/phy/rf/rf.h" #include "srslte/upper/pdcp_config.h" #include "srslte/upper/pdcp_entity_base.h" namespace srsue { typedef enum { AUTH_OK, AUTH_FAILED, AUTH_SYNCH_FAILURE } auth_result_t; // USIM interface for NAS class usim_interface_nas { public: virtual std::string get_imsi_str() = 0; virtual std::string get_imei_str() = 0; virtual bool get_imsi_vec(uint8_t* imsi_, uint32_t n) = 0; virtual bool get_imei_vec(uint8_t* imei_, uint32_t n) = 0; virtual bool get_home_plmn_id(srslte::plmn_id_t* home_plmn_id) = 0; virtual auth_result_t generate_authentication_response(uint8_t* rand, uint8_t* autn_enb, uint16_t mcc, uint16_t mnc, uint8_t* res, int* res_len, uint8_t* k_asme) = 0; virtual void generate_nas_keys(uint8_t* k_asme, uint8_t* k_nas_enc, uint8_t* k_nas_int, srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo, srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo) = 0; }; // USIM interface for RRC class usim_interface_rrc { public: virtual void generate_as_keys(uint8_t* k_asme, uint32_t count_ul, srslte::as_security_config_t* sec_cfg) = 0; virtual void generate_as_keys_ho(uint32_t pci, uint32_t earfcn, int ncc, srslte::as_security_config_t* sec_cfg) = 0; }; // GW interface for NAS class gw_interface_nas { public: virtual int setup_if_addr(uint32_t lcid, uint8_t pdn_type, uint32_t ip_addr, uint8_t* ipv6_if_id, char* err_str) = 0; virtual int apply_traffic_flow_template(const uint8_t& eps_bearer_id, const uint8_t& lcid, const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft) = 0; }; // GW interface for RRC class gw_interface_rrc { public: virtual void add_mch_port(uint32_t lcid, uint32_t port) = 0; }; // GW interface for PDCP class gw_interface_pdcp { public: virtual void write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0; virtual void write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0; }; // RRC interface for MAC class rrc_interface_mac_common { public: virtual void ra_problem() = 0; }; class rrc_interface_mac : public rrc_interface_mac_common { public: virtual void ho_ra_completed(bool ra_successful) = 0; virtual void release_pucch_srs() = 0; }; // RRC interface for PHY class rrc_interface_phy_lte { public: // Measurement object from phy typedef struct { float rsrp; float rsrq; uint32_t earfcn; uint32_t pci; } phy_meas_t; virtual void in_sync() = 0; virtual void out_of_sync() = 0; virtual void new_cell_meas(const std::vector& meas) = 0; }; // RRC interface for NAS class rrc_interface_nas { public: typedef struct { srslte::plmn_id_t plmn_id; uint16_t tac; } found_plmn_t; const static int MAX_FOUND_PLMNS = 16; virtual void write_sdu(srslte::unique_byte_buffer_t sdu) = 0; virtual uint16_t get_mcc() = 0; virtual uint16_t get_mnc() = 0; virtual void enable_capabilities() = 0; virtual bool plmn_search() = 0; virtual void plmn_select(srslte::plmn_id_t plmn_id) = 0; virtual bool connection_request(srslte::establishment_cause_t cause, srslte::unique_byte_buffer_t dedicatedInfoNAS) = 0; virtual void set_ue_identity(srslte::s_tmsi_t s_tmsi) = 0; virtual bool is_connected() = 0; virtual void paging_completed(bool outcome) = 0; virtual std::string get_rb_name(uint32_t lcid) = 0; virtual uint32_t get_lcid_for_eps_bearer(const uint32_t& eps_bearer_id) = 0; }; // RRC interface for PDCP class rrc_interface_pdcp { public: virtual void write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0; virtual void write_pdu_bcch_bch(srslte::unique_byte_buffer_t pdu) = 0; virtual void write_pdu_bcch_dlsch(srslte::unique_byte_buffer_t pdu) = 0; virtual void write_pdu_pcch(srslte::unique_byte_buffer_t pdu) = 0; virtual void write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0; virtual std::string get_rb_name(uint32_t lcid) = 0; }; // RRC interface for RLC class rrc_interface_rlc { public: virtual void max_retx_attempted() = 0; virtual std::string get_rb_name(uint32_t lcid) = 0; virtual void write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0; }; // NAS interface for RRC class nas_interface_rrc { public: typedef enum { BARRING_NONE = 0, BARRING_MO_DATA, BARRING_MO_SIGNALLING, BARRING_MT, BARRING_ALL } barring_t; virtual void left_rrc_connected() = 0; virtual void set_barring(barring_t barring) = 0; virtual bool paging(srslte::s_tmsi_t* ue_identity) = 0; virtual bool is_attached() = 0; virtual void write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0; virtual uint32_t get_k_enb_count() = 0; virtual bool get_k_asme(uint8_t* k_asme_, uint32_t n) = 0; virtual uint32_t get_ipv4_addr() = 0; virtual bool get_ipv6_addr(uint8_t* ipv6_addr) = 0; virtual void plmn_search_completed(const rrc_interface_nas::found_plmn_t found_plmns[rrc_interface_nas::MAX_FOUND_PLMNS], int nof_plmns) = 0; virtual bool connection_request_completed(bool outcome) = 0; virtual void run_tti(uint32_t tti) = 0; }; // NAS interface for UE class nas_interface_ue { public: virtual void start_attach_request(srslte::proc_state_t* proc_result, srslte::establishment_cause_t cause_) = 0; virtual bool detach_request(const bool switch_off) = 0; }; // PDCP interface for RRC class pdcp_interface_rrc { public: virtual void reestablish() = 0; virtual void reestablish(uint32_t lcid) = 0; virtual void reset() = 0; virtual void write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu, bool blocking) = 0; virtual void add_bearer(uint32_t lcid, srslte::pdcp_config_t cnfg) = 0; virtual void change_lcid(uint32_t old_lcid, uint32_t new_lcid) = 0; virtual void config_security(uint32_t lcid, srslte::as_security_config_t sec_cfg) = 0; virtual void config_security_all(srslte::as_security_config_t sec_cfg) = 0; virtual void enable_integrity(uint32_t lcid, srslte::srslte_direction_t direction) = 0; virtual void enable_encryption(uint32_t lcid, srslte::srslte_direction_t direction = srslte::srslte_direction_t::DIRECTION_TXRX) = 0; }; // PDCP interface for RLC class pdcp_interface_rlc { public: /* RLC calls PDCP to push a PDCP PDU. */ virtual void write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu) = 0; virtual void write_pdu_bcch_bch(srslte::unique_byte_buffer_t sdu) = 0; virtual void write_pdu_bcch_dlsch(srslte::unique_byte_buffer_t sdu) = 0; virtual void write_pdu_pcch(srslte::unique_byte_buffer_t sdu) = 0; virtual void write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t sdu) = 0; }; class pdcp_interface_gw { public: virtual void write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu, bool blocking) = 0; virtual bool is_lcid_enabled(uint32_t lcid) = 0; }; // RLC interface for RRC class rlc_interface_rrc { public: virtual void reset() = 0; virtual void reestablish() = 0; virtual void reestablish(uint32_t lcid) = 0; virtual void add_bearer(uint32_t lcid, srslte::rlc_config_t cnfg) = 0; virtual void add_bearer_mrb(uint32_t lcid) = 0; virtual void del_bearer(uint32_t lcid) = 0; virtual void suspend_bearer(uint32_t lcid) = 0; virtual void resume_bearer(uint32_t lcid) = 0; virtual void change_lcid(uint32_t old_lcid, uint32_t new_lcid) = 0; virtual bool has_bearer(uint32_t lcid) = 0; virtual bool has_data(const uint32_t lcid) = 0; virtual bool is_suspended(const uint32_t lcid) = 0; virtual void write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu, bool blocking = true) = 0; }; // RLC interface for PDCP class rlc_interface_pdcp { public: /* PDCP calls RLC to push an RLC SDU. SDU gets placed into the RLC buffer and MAC pulls * RLC PDUs according to TB size. */ virtual void write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu, bool blocking = true) = 0; virtual void discard_sdu(uint32_t lcid, uint32_t discard_sn) = 0; virtual bool rb_is_um(uint32_t lcid) = 0; }; // RLC interface for MAC class rlc_interface_mac : public srslte::read_pdu_interface { public: /* MAC calls has_data() to query whether a logical channel has data to transmit (without * knowing how much. This function should return quickly. */ virtual bool has_data(const uint32_t lcid) = 0; /* MAC calls RLC to get the buffer state for a logical channel. */ virtual uint32_t get_buffer_state(const uint32_t lcid) = 0; const static int MAX_PDU_SEGMENTS = 20; /* MAC calls RLC to get RLC segment of nof_bytes length. * Segmentation happens in this function. RLC PDU is stored in payload. */ virtual int read_pdu(uint32_t lcid, uint8_t* payload, uint32_t nof_bytes) = 0; /* MAC calls RLC to push an RLC PDU. This function is called from an independent MAC thread. * PDU gets placed into the buffer and higher layer thread gets notified. */ virtual void write_pdu(uint32_t lcid, uint8_t* payload, uint32_t nof_bytes) = 0; virtual void write_pdu_bcch_bch(uint8_t* payload, uint32_t nof_bytes) = 0; virtual void write_pdu_bcch_dlsch(uint8_t* payload, uint32_t nof_bytes) = 0; virtual void write_pdu_pcch(uint8_t* payload, uint32_t nof_bytes) = 0; virtual void write_pdu_mch(uint32_t lcid, uint8_t* payload, uint32_t nof_bytes) = 0; }; /** MAC interface * */ /* Interface PHY -> MAC */ class mac_interface_phy_lte { public: typedef struct { uint32_t nof_mbsfn_services; } mac_phy_cfg_mbsfn_t; typedef struct { uint32_t tbs; bool ndi; bool ndi_present; int rv; } mac_tb_t; typedef struct { mac_tb_t tb[SRSLTE_MAX_TB]; uint32_t pid; uint16_t rnti; bool is_sps_release; uint32_t tti; } mac_grant_dl_t; typedef struct { mac_tb_t tb; uint32_t pid; uint16_t rnti; bool phich_available; bool hi_value; bool is_rar; uint32_t tti_tx; } mac_grant_ul_t; typedef struct { bool enabled; uint32_t rv; uint8_t* payload; union { srslte_softbuffer_rx_t* rx; srslte_softbuffer_tx_t* tx; } softbuffer; } tb_action_t; typedef struct { tb_action_t tb[SRSLTE_MAX_TB]; bool generate_ack; } tb_action_dl_t; typedef struct { tb_action_t tb; uint32_t current_tx_nb; bool expect_ack; } tb_action_ul_t; /* Query the MAC for the current RNTI to look for */ virtual uint16_t get_dl_sched_rnti(uint32_t tti) = 0; virtual uint16_t get_ul_sched_rnti(uint32_t tti) = 0; /* Indicate reception of UL dci. * payload_ptr points to memory where MAC PDU must be written by MAC layer */ virtual void new_grant_ul(uint32_t cc_idx, mac_grant_ul_t grant, tb_action_ul_t* action) = 0; /* Indicate reception of DL dci. */ virtual void new_grant_dl(uint32_t cc_idx, mac_grant_dl_t grant, tb_action_dl_t* action) = 0; /* Indicate successful decoding of PDSCH AND PCH TB. */ virtual void tb_decoded(uint32_t cc_idx, mac_grant_dl_t grant, bool ack[SRSLTE_MAX_CODEWORDS]) = 0; /* Indicate successful decoding of BCH TB through PBCH */ virtual void bch_decoded_ok(uint32_t cc_idx, uint8_t* payload, uint32_t len) = 0; /* Indicate successful decoding of MCH TB through PMCH */ virtual void mch_decoded(uint32_t len, bool crc) = 0; /* Obtain action for a new MCH subframe. */ virtual void new_mch_dl(srslte_pdsch_grant_t phy_grant, tb_action_dl_t* action) = 0; /* Communicate the number of mbsfn services available */ virtual void set_mbsfn_config(uint32_t nof_mbsfn_services) = 0; /* Indicate new TTI */ virtual void run_tti(const uint32_t tti) = 0; }; /* Interface RRC -> MAC shared between different RATs */ class mac_interface_rrc_common { public: // Class to handle UE specific RNTIs between RRC and MAC typedef struct { uint16_t crnti; uint16_t rar_rnti; uint16_t temp_rnti; uint16_t tpc_rnti; uint16_t sps_rnti; uint64_t contention_id; } ue_rnti_t; }; /* Interface RRC -> MAC */ class mac_interface_rrc : public mac_interface_rrc_common { public: virtual void clear_rntis() = 0; /* Instructs the MAC to start receiving BCCH */ virtual void bcch_start_rx(int si_window_start, int si_window_length) = 0; virtual void bcch_stop_rx() = 0; /* Instructs the MAC to start receiving PCCH */ virtual void pcch_start_rx() = 0; /* RRC configures a logical channel */ virtual void setup_lcid(uint32_t lcid, uint32_t lcg, uint32_t priority, int PBR_x_tti, uint32_t BSD) = 0; /* Instructs the MAC to start receiving an MCH */ virtual void mch_start_rx(uint32_t lcid) = 0; virtual uint32_t get_current_tti() = 0; virtual void set_config(srslte::mac_cfg_t& mac_cfg) = 0; virtual void get_rntis(ue_rnti_t* rntis) = 0; virtual void set_contention_id(uint64_t uecri) = 0; virtual void set_ho_rnti(uint16_t crnti, uint16_t target_pci) = 0; virtual void start_noncont_ho(uint32_t preamble_index, uint32_t prach_mask) = 0; virtual void start_cont_ho() = 0; virtual void reconfiguration(const uint32_t& cc_idx, const bool& enable) = 0; virtual void reset() = 0; virtual void wait_uplink() = 0; }; /** PHY interface * */ typedef struct { std::string type = "lte"; srslte::phy_log_args_t log; std::string dl_earfcn = "3400"; // comma-separated list of EARFCNs std::vector earfcn_list = {3400}; // vectorized version of dl_earfcn that gets populated during init float dl_freq = -1.0f; float ul_freq = -1.0f; bool ul_pwr_ctrl_en = false; float prach_gain = -1; int pdsch_max_its = 8; int nof_phy_threads = 3; int worker_cpu_mask = -1; int sync_cpu_affinity = -1; uint32_t nof_carriers = 1; uint32_t nof_rx_ant = 1; std::string equalizer_mode = "mmse"; int cqi_max = 15; int cqi_fixed = -1; float snr_ema_coeff = 0.1f; std::string snr_estim_alg = "refs"; bool agc_enable = true; bool correct_sync_error = false; bool cfo_is_doppler = false; bool cfo_integer_enabled = false; float cfo_correct_tol_hz = 1.0f; float cfo_pss_ema = DEFAULT_CFO_EMA_TRACK; float cfo_loop_bw_pss = DEFAULT_CFO_BW_PSS; float cfo_loop_bw_ref = DEFAULT_CFO_BW_REF; float cfo_loop_ref_min = DEFAULT_CFO_REF_MIN; float cfo_loop_pss_tol = DEFAULT_CFO_PSS_MIN; float sfo_ema = DEFAULT_SFO_EMA_COEFF; uint32_t sfo_correct_period = DEFAULT_SAMPLE_OFFSET_CORRECT_PERIOD; uint32_t cfo_loop_pss_conv = DEFAULT_PSS_STABLE_TIMEOUT; uint32_t cfo_ref_mask = 1023; bool interpolate_subframe_enabled = false; bool estimator_fil_auto = false; float estimator_fil_stddev = 1.0f; uint32_t estimator_fil_order = 4; float snr_to_cqi_offset = 0.0f; std::string sss_algorithm = "full"; float rx_gain_offset = 62; bool pdsch_csi_enabled = true; bool pdsch_8bit_decoder = false; uint32_t intra_freq_meas_len_ms = 20; uint32_t intra_freq_meas_period_ms = 200; bool pregenerate_signals = false; float force_ul_amplitude = 0.0f; float in_sync_rsrp_dbm_th = -130.0f; float in_sync_snr_db_th = 1.0f; uint32_t nof_in_sync_events = 10; uint32_t nof_out_of_sync_events = 20; srslte::channel::args_t dl_channel_args; srslte::channel::args_t ul_channel_args; } phy_args_t; /* RAT agnostic Interface MAC -> PHY */ class phy_interface_mac_common { public: /* Sets a C-RNTI allowing the PHY to pregenerate signals if necessary */ virtual void set_crnti(uint16_t rnti) = 0; /* Time advance commands */ virtual void set_timeadv_rar(uint32_t ta_cmd) = 0; virtual void set_timeadv(uint32_t ta_cmd) = 0; /* Activate / Disactivate SCell*/ virtual void set_activation_deactivation_scell(uint32_t cmd) = 0; /* Sets RAR dci payload */ virtual void set_rar_grant(uint8_t grant_payload[SRSLTE_RAR_GRANT_LEN], uint16_t rnti) = 0; virtual uint32_t get_current_tti() = 0; virtual float get_phr() = 0; virtual float get_pathloss_db() = 0; }; /* Interface MAC -> PHY */ class phy_interface_mac_lte : public phy_interface_mac_common { public: typedef struct { bool is_transmitted; uint32_t tti_ra; uint32_t f_id; uint32_t preamble_format; } prach_info_t; /* Configure PRACH using parameters written by RRC */ virtual void configure_prach_params() = 0; virtual void prach_send(uint32_t preamble_idx, int allowed_subframe, float target_power_dbm, float ta_base_sec = 0.0f) = 0; virtual prach_info_t prach_get_info() = 0; /* Indicates the transmission of a SR signal in the next opportunity */ virtual void sr_send() = 0; virtual int sr_last_tx_tti() = 0; virtual void set_mch_period_stop(uint32_t stop) = 0; }; class phy_interface_rrc_lte { public: virtual void set_config(srslte::phy_cfg_t& config, uint32_t cc_idx = 0, uint32_t earfcn = 0, srslte_cell_t* cell_info = nullptr) = 0; virtual void set_config_tdd(srslte_tdd_config_t& tdd_config) = 0; virtual void set_config_mbsfn_sib2(srslte::mbsfn_sf_cfg_t* cfg_list, uint32_t nof_cfgs) = 0; virtual void set_config_mbsfn_sib13(const srslte::sib13_t& sib13) = 0; virtual void set_config_mbsfn_mcch(const srslte::mcch_msg_t& mcch) = 0; /* Measurements interface */ virtual void set_cells_to_meas(uint32_t earfcn, const std::set& pci) = 0; virtual void meas_stop() = 0; typedef struct { enum { CELL_FOUND = 0, CELL_NOT_FOUND, ERROR } found; enum { MORE_FREQS = 0, NO_MORE_FREQS } last_freq; } cell_search_ret_t; typedef struct { uint32_t pci; uint32_t earfcn; } phy_cell_t; /* Cell search and selection procedures */ virtual cell_search_ret_t cell_search(phy_cell_t* cell) = 0; virtual bool cell_select(const phy_cell_t* cell = NULL) = 0; virtual bool cell_is_camping() = 0; virtual void reset() = 0; virtual void enable_pregen_signals(bool enable) = 0; }; // STACK interface for GW class stack_interface_gw : public pdcp_interface_gw { public: virtual bool switch_on() = 0; }; class gw_interface_stack : public gw_interface_nas, public gw_interface_rrc, public gw_interface_pdcp { }; // STACK interface for MAC class stack_interface_mac { public: virtual void process_pdus() = 0; virtual void wait_ra_completion(uint16_t rnti) = 0; virtual void start_prach_configuration() = 0; }; // STACK interface for RRC class stack_interface_rrc { public: virtual void start_cell_search() = 0; virtual void start_cell_select(const phy_interface_rrc_lte::phy_cell_t* cell) = 0; }; // Combined interface for PHY to access stack (MAC and RRC) class stack_interface_phy_lte : public mac_interface_phy_lte, public rrc_interface_phy_lte { }; // Combined interface for stack (MAC and RRC) to access PHY class phy_interface_stack_lte : public phy_interface_mac_lte, public phy_interface_rrc_lte { }; // Generic Task Management + Timer interface for upper stack class task_handler_interface_lte { public: virtual srslte::timer_handler::unique_timer get_unique_timer() = 0; }; } // namespace srsue #endif // SRSLTE_UE_INTERFACES_H