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415 lines
12 KiB
C++
415 lines
12 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsUE library.
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*
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* srsUE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsUE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#ifndef RRC_H
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#define RRC_H
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#include "pthread.h"
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#include "rrc_common.h"
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#include "srslte/common/buffer_pool.h"
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#include "srslte/common/log.h"
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#include "srslte/common/common.h"
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#include "srslte/interfaces/ue_interfaces.h"
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#include "srslte/common/security.h"
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#include "srslte/common/threads.h"
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#include <map>
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#include <queue>
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typedef struct {
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uint32_t ue_category;
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uint32_t feature_group;
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uint8_t supported_bands[LIBLTE_RRC_BAND_N_ITEMS];
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uint32_t nof_supported_bands;
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}rrc_args_t;
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using srslte::byte_buffer_t;
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static std::string rb_id_str[] = {"SRB0", "SRB1", "SRB2",
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"DRB1","DRB2","DRB3",
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"DRB4","DRB5","DRB6",
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"DRB7","DRB8"};
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namespace srsue {
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class rrc
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:public rrc_interface_nas
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,public rrc_interface_phy
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,public rrc_interface_mac
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,public rrc_interface_pdcp
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,public rrc_interface_rlc
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,public srslte::timer_callback
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,public thread
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{
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public:
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rrc();
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void init(phy_interface_rrc *phy_,
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mac_interface_rrc *mac_,
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rlc_interface_rrc *rlc_,
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pdcp_interface_rrc *pdcp_,
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nas_interface_rrc *nas_,
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usim_interface_rrc *usim_,
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srslte::mac_interface_timers *mac_timers_,
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srslte::log *rrc_log_);
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void stop();
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rrc_state_t get_state();
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void set_args(rrc_args_t *args);
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// Timeout callback interface
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void timer_expired(uint32_t timeout_id);
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void liblte_rrc_log(char *str);
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// NAS interface
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void write_sdu(uint32_t lcid, byte_buffer_t *sdu);
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uint16_t get_mcc();
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uint16_t get_mnc();
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void enable_capabilities();
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void plmn_search();
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void plmn_select(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id);
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// PHY interface
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void in_sync();
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void out_of_sync();
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void earfcn_end();
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void cell_found(uint32_t earfcn, srslte_cell_t phy_cell, float rsrp);
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void new_phy_meas(float rsrp, float rsrq, uint32_t tti, uint32_t earfcn, uint32_t pci);
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// MAC interface
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void ho_ra_completed(bool ra_successful);
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void release_pucch_srs();
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void run_tti(uint32_t tti);
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void ra_problem();
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// GW interface
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bool is_connected();
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bool have_drb();
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// PDCP interface
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void write_pdu(uint32_t lcid, byte_buffer_t *pdu);
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void write_pdu_bcch_bch(byte_buffer_t *pdu);
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void write_pdu_bcch_dlsch(byte_buffer_t *pdu);
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void write_pdu_pcch(byte_buffer_t *pdu);
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private:
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srslte::byte_buffer_pool *pool;
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srslte::log *rrc_log;
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phy_interface_rrc *phy;
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mac_interface_rrc *mac;
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rlc_interface_rrc *rlc;
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pdcp_interface_rrc *pdcp;
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nas_interface_rrc *nas;
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usim_interface_rrc *usim;
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LIBLTE_RRC_UL_DCCH_MSG_STRUCT ul_dcch_msg;
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LIBLTE_RRC_UL_CCCH_MSG_STRUCT ul_ccch_msg;
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LIBLTE_RRC_DL_CCCH_MSG_STRUCT dl_ccch_msg;
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LIBLTE_RRC_DL_DCCH_MSG_STRUCT dl_dcch_msg;
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byte_buffer_t* byte_align_and_pack(byte_buffer_t *pdu = NULL);
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void send_ul_ccch_msg(byte_buffer_t *pdu = NULL);
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void send_ul_dcch_msg(byte_buffer_t *pdu = NULL);
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srslte::bit_buffer_t bit_buf;
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pthread_mutex_t mutex;
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rrc_state_t state;
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uint8_t transaction_id;
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bool drb_up;
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rrc_args_t args;
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bool first_stimsi_attempt;
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uint16_t ho_src_rnti;
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int ho_src_cell_idx;
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phy_interface_rrc::phy_cfg_t ho_src_phy_cfg;
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mac_interface_rrc::mac_cfg_t ho_src_mac_cfg;
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bool pending_mob_reconf;
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LIBLTE_RRC_CONNECTION_RECONFIGURATION_STRUCT mob_reconf;
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// timeouts in ms
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uint32_t connecting_timeout;
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static const uint32_t RRC_CONNECTING_TIMEOUT = 1000;
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uint32_t plmn_select_timeout;
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static const uint32_t RRC_PLMN_SELECT_TIMEOUT = 10000;
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uint32_t select_cell_timeout;
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static const uint32_t RRC_SELECT_CELL_TIMEOUT = 2000;
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uint8_t k_rrc_enc[32];
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uint8_t k_rrc_int[32];
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uint8_t k_up_enc[32];
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uint8_t k_up_int[32]; // Not used: only for relay nodes (3GPP 33.401 Annex A.7)
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srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo;
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srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo;
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std::map<uint32_t, LIBLTE_RRC_SRB_TO_ADD_MOD_STRUCT> srbs;
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std::map<uint32_t, LIBLTE_RRC_DRB_TO_ADD_MOD_STRUCT> drbs;
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// RRC constants and timers
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srslte::mac_interface_timers *mac_timers;
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uint32_t n310_cnt, N310;
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uint32_t n311_cnt, N311;
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uint32_t t301, t310, t311, t304;
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typedef struct {
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uint32_t earfcn;
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srslte_cell_t phy_cell;
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float rsrp;
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bool has_valid_sib1;
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bool has_valid_sib2;
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bool has_valid_sib3;
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bool has_valid_sib13;
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bool in_sync;
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LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_1_STRUCT sib1;
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LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_2_STRUCT sib2;
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LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_3_STRUCT sib3;
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LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_13_STRUCT sib13;
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} cell_t;
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const static int MAX_KNOWN_CELLS = 64;
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cell_t known_cells[MAX_KNOWN_CELLS];
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cell_t *current_cell;
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int find_cell_idx(uint32_t earfcn, uint32_t pci);
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cell_t* add_new_cell(uint32_t earfcn, srslte_cell_t phy_cell, float rsrp);
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uint32_t find_best_cell(uint32_t earfcn, srslte_cell_t *cell);
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typedef enum {
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SI_ACQUIRE_IDLE = 0,
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SI_ACQUIRE_SIB1,
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SI_ACQUIRE_SIB2
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} si_acquire_state_t;
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si_acquire_state_t si_acquire_state;
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void run_si_acquisition_procedure();
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uint32_t sib_start_tti(uint32_t tti, uint32_t period, uint32_t offset, uint32_t sf);
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uint32_t nof_sib1_trials;
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uint16_t sysinfo_index;
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uint32_t last_win_start;
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void select_next_cell_in_plmn();
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LIBLTE_RRC_PLMN_IDENTITY_STRUCT selected_plmn_id;
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int last_selected_cell;
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bool thread_running;
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void run_thread();
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// Measurements sub-class
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class rrc_meas {
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public:
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void init(rrc *parent);
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void reset();
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void parse_meas_config(LIBLTE_RRC_MEAS_CONFIG_STRUCT *meas_config);
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void new_phy_meas(uint32_t earfcn, uint32_t pci, float rsrp, float rsrq, uint32_t tti);
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void run_tti(uint32_t tti);
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bool timer_expired(uint32_t timer_id);
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void ho_finish();
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private:
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const static int NOF_MEASUREMENTS = 3;
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typedef enum {RSRP = 0, RSRQ = 1, BOTH = 2} quantity_t;
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typedef struct {
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uint32_t pci;
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float q_offset;
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} meas_cell_t;
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typedef struct {
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uint32_t earfcn;
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float q_offset;
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std::map<uint32_t, meas_cell_t> cells;
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} meas_obj_t;
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typedef struct {
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uint32_t interval;
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uint32_t max_cell;
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uint32_t amount;
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quantity_t trigger_quantity;
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quantity_t report_quantity;
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LIBLTE_RRC_EVENT_EUTRA_STRUCT event;
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enum {EVENT, PERIODIC} trigger_type;
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} report_cfg_t;
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typedef struct {
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float ms[NOF_MEASUREMENTS];
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bool triggered;
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bool timer_enter_triggered;
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bool timer_exit_triggered;
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uint32_t enter_tti;
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uint32_t exit_tti;
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} meas_value_t;
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typedef struct {
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uint32_t nof_reports_sent;
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uint32_t report_id;
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uint32_t object_id;
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bool triggered;
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uint32_t periodic_timer;
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std::map<uint32_t, meas_value_t> cell_values; // Value for each PCI in this object
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} meas_t;
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std::map<uint32_t, meas_obj_t> objects;
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std::map<uint32_t, report_cfg_t> reports_cfg;
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std::map<uint32_t, meas_t> active;
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rrc *parent;
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srslte::log *log_h;
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phy_interface_rrc *phy;
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srslte::mac_interface_timers *mac_timers;
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uint32_t filter_k_rsrp, filter_k_rsrq;
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float filter_a[NOF_MEASUREMENTS];
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meas_value_t pcell_measurement;
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bool s_measure_enabled;
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float s_measure_value;
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void stop_reports(meas_t *m);
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void stop_reports_object(uint32_t object_id);
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void remove_meas_object(uint32_t object_id);
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void remove_meas_report(uint32_t report_id);
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void remove_meas_id(uint32_t measId);
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void remove_meas_id(std::map<uint32_t, meas_t>::iterator it);
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void calculate_triggers(uint32_t tti);
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void update_phy();
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void L3_filter(meas_value_t *value, float rsrp[NOF_MEASUREMENTS]);
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bool find_earfcn_cell(uint32_t earfcn, uint32_t pci, meas_obj_t **object, int *cell_idx);
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float range_to_value(quantity_t quant, uint8_t range);
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uint8_t value_to_range(quantity_t quant, float value);
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bool process_event(LIBLTE_RRC_EVENT_EUTRA_STRUCT *event, uint32_t tti,
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bool enter_condition, bool exit_condition,
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meas_t *m, meas_value_t *cell);
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void generate_report(uint32_t meas_id);
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};
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rrc_meas measurements;
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// Cell selection/reselection functions/variables
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typedef struct {
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float Qrxlevmin;
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float Qrxlevminoffset;
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float Qqualmin;
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float Qqualminoffset;
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float s_intrasearchP;
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float q_hyst;
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float threshservinglow;
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} cell_resel_cfg_t;
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cell_resel_cfg_t cell_resel_cfg;
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float get_srxlev(float Qrxlevmeas);
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float get_squal(float Qqualmeas);
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void cell_reselection_eval(float rsrp, float rsrq);
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bool cell_selection_eval(float rsrp, float rsrq = 0);
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bool connection_requested;
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void plmn_select_rrc(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id);
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// RLC interface
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void max_retx_attempted();
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// Senders
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void send_con_request();
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void send_con_restablish_request(LIBLTE_RRC_CON_REEST_REQ_CAUSE_ENUM cause, uint16_t crnti);
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void send_con_restablish_complete();
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void send_con_setup_complete(byte_buffer_t *nas_msg);
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void send_ul_info_transfer(uint32_t lcid, byte_buffer_t *sdu);
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void send_security_mode_complete(uint32_t lcid, byte_buffer_t *pdu);
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void send_rrc_con_reconfig_complete(byte_buffer_t *pdu);
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void send_rrc_ue_cap_info(byte_buffer_t *pdu);
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// Parsers
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void parse_dl_ccch(byte_buffer_t *pdu);
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void parse_dl_dcch(uint32_t lcid, byte_buffer_t *pdu);
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void parse_dl_info_transfer(uint32_t lcid, byte_buffer_t *pdu);
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// Helpers
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void ho_failed();
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bool ho_prepare();
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void add_neighbour_cell(uint32_t earfcn, uint32_t pci, float rsrp);
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void rrc_connection_release();
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void con_restablish_cell_reselected();
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void radio_link_failure();
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static void* start_sib_thread(void *rrc_);
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void sib_search();
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void apply_rr_config_common_dl(LIBLTE_RRC_RR_CONFIG_COMMON_STRUCT *config);
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void apply_rr_config_common_ul(LIBLTE_RRC_RR_CONFIG_COMMON_STRUCT *config);
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void handle_sib1();
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void handle_sib2();
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void handle_sib3();
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void handle_sib13();
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void apply_sib2_configs(LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_2_STRUCT *sib2);
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void handle_con_setup(LIBLTE_RRC_CONNECTION_SETUP_STRUCT *setup);
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void handle_con_reest(LIBLTE_RRC_CONNECTION_REESTABLISHMENT_STRUCT *setup);
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void handle_rrc_con_reconfig(uint32_t lcid, LIBLTE_RRC_CONNECTION_RECONFIGURATION_STRUCT *reconfig, byte_buffer_t *pdu);
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void add_srb(LIBLTE_RRC_SRB_TO_ADD_MOD_STRUCT *srb_cnfg);
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void add_drb(LIBLTE_RRC_DRB_TO_ADD_MOD_STRUCT *drb_cnfg);
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void release_drb(uint8_t lcid);
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void apply_rr_config_dedicated(LIBLTE_RRC_RR_CONFIG_DEDICATED_STRUCT *cnfg);
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void apply_phy_config_dedicated(LIBLTE_RRC_PHYSICAL_CONFIG_DEDICATED_STRUCT *phy_cnfg, bool apply_defaults);
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void apply_mac_config_dedicated(LIBLTE_RRC_MAC_MAIN_CONFIG_STRUCT *mac_cfg, bool apply_defaults);
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// Helpers for setting default values
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void set_phy_default_pucch_srs();
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void set_phy_default();
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void set_mac_default();
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void set_rrc_default();
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void set_bearers();
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};
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} // namespace srsue
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#endif // RRC_H
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