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srsLTE
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srsLTE/srsue/hdr/upper/rrc.h

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/**
*
* \section COPYRIGHT
*
* Copyright 2013-2015 Software Radio Systems Limited
*
* \section LICENSE
*
* This file is part of the srsUE library.
*
* srsUE 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.
*
* srsUE 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 RRC_H
#define RRC_H
#include "pthread.h"
#include "rrc_common.h"
#include "srslte/common/buffer_pool.h"
#include "srslte/common/log.h"
#include "srslte/common/common.h"
#include "srslte/interfaces/ue_interfaces.h"
#include "srslte/common/security.h"
#include "srslte/common/threads.h"
#include <map>
typedef struct {
bool stmsi_attach;
LIBLTE_RRC_S_TMSI_STRUCT stmsi_value;
uint32_t ue_category;
uint32_t feature_group;
uint8_t supported_bands[LIBLTE_RRC_BAND_N_ITEMS];
uint32_t nof_supported_bands;
}rrc_args_t;
using srslte::byte_buffer_t;
namespace srsue {
static std::string rb_id_str[] = {"SRB0", "SRB1", "SRB2",
"DRB1","DRB2","DRB3",
"DRB4","DRB5","DRB6",
"DRB7","DRB8"};
class rrc
:public rrc_interface_nas
,public rrc_interface_phy
,public rrc_interface_mac
,public rrc_interface_pdcp
,public rrc_interface_rlc
,public srslte::timer_callback
,public thread
{
public:
rrc();
void init(phy_interface_rrc *phy_,
mac_interface_rrc *mac_,
rlc_interface_rrc *rlc_,
pdcp_interface_rrc *pdcp_,
nas_interface_rrc *nas_,
usim_interface_rrc *usim_,
srslte::mac_interface_timers *mac_timers_,
srslte::log *rrc_log_);
void stop();
rrc_state_t get_state();
void set_args(rrc_args_t *args);
// Timeout callback interface
void timer_expired(uint32_t timeout_id);
void liblte_rrc_log(char *str);
private:
srslte::byte_buffer_pool *pool;
srslte::log *rrc_log;
phy_interface_rrc *phy;
mac_interface_rrc *mac;
rlc_interface_rrc *rlc;
pdcp_interface_rrc *pdcp;
nas_interface_rrc *nas;
usim_interface_rrc *usim;
srslte::bit_buffer_t bit_buf;
pthread_mutex_t mutex;
rrc_state_t state;
uint8_t transaction_id;
bool drb_up;
rrc_args_t args;
bool first_stimsi_attempt;
bool reestablishment_in_progress;
// timeouts in ms
uint32_t connecting_timeout;
static const uint32_t RRC_CONNECTING_TIMEOUT = 1000;
uint32_t plmn_select_timeout;
static const uint32_t RRC_PLMN_SELECT_TIMEOUT = 10000;
uint32_t select_cell_timeout;
static const uint32_t RRC_SELECT_CELL_TIMEOUT = 2000;
uint8_t k_rrc_enc[32];
uint8_t k_rrc_int[32];
uint8_t k_up_enc[32];
uint8_t k_up_int[32]; // Not used: only for relay nodes (3GPP 33.401 Annex A.7)
srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo;
srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo;
std::map<uint32_t, LIBLTE_RRC_SRB_TO_ADD_MOD_STRUCT> srbs;
std::map<uint32_t, LIBLTE_RRC_DRB_TO_ADD_MOD_STRUCT> drbs;
LIBLTE_RRC_DL_CCCH_MSG_STRUCT dl_ccch_msg;
LIBLTE_RRC_DL_DCCH_MSG_STRUCT dl_dcch_msg;
// RRC constants and timers
srslte::mac_interface_timers *mac_timers;
uint32_t sync_reset_cnt;
const static uint32_t SYNC_RESET_TIMEOUT = 10;
uint32_t n310_cnt, N310;
uint32_t n311_cnt, N311;
uint32_t t301, t310, t311;
typedef struct {
uint32_t earfcn;
srslte_cell_t phy_cell;
float rsrp;
bool has_valid_sib1;
bool has_valid_sib2;
bool in_sync;
LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_1_STRUCT sib1;
LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_2_STRUCT sib2;
} cell_t;
std::vector<cell_t> known_cells;
cell_t *current_cell;
typedef enum {
SI_ACQUIRE_IDLE = 0,
SI_ACQUIRE_SIB1,
SI_ACQUIRE_SIB2
} si_acquire_state_t;
si_acquire_state_t si_acquire_state;
void run_si_acquisition_procedure();
uint32_t sib_start_tti(uint32_t tti, uint32_t period, uint32_t x);
uint32_t nof_sib1_trials;
uint32_t last_win_start;
void select_next_cell_in_plmn();
LIBLTE_RRC_PLMN_IDENTITY_STRUCT selected_plmn_id;
int last_selected_cell;
bool thread_running;
void run_thread();
// NAS interface
void write_sdu(uint32_t lcid, byte_buffer_t *sdu);
uint16_t get_mcc();
uint16_t get_mnc();
void enable_capabilities();
void plmn_search();
void plmn_select(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id);
// PHY interface
void in_sync();
void out_of_sync();
void earfcn_end();
void cell_found(uint32_t earfcn, srslte_cell_t phy_cell, float rsrp);
// MAC interface
void release_pucch_srs();
void ra_problem();
// GW interface
bool is_connected();
bool have_drb();
// PDCP interface
void write_pdu(uint32_t lcid, byte_buffer_t *pdu);
void write_pdu_bcch_bch(byte_buffer_t *pdu);
void write_pdu_bcch_dlsch(byte_buffer_t *pdu);
void write_pdu_pcch(byte_buffer_t *pdu);
// Radio bearers
typedef enum{
RB_ID_SRB0 = 0,
RB_ID_SRB1,
RB_ID_SRB2,
RB_ID_DRB1,
RB_ID_DRB2,
RB_ID_DRB3,
RB_ID_DRB4,
RB_ID_DRB5,
RB_ID_DRB6,
RB_ID_DRB7,
RB_ID_DRB8,
RB_ID_MAX
} rb_id_t;
std::string get_rb_name(uint32_t lcid) {
if (lcid < RB_ID_MAX) {
return rb_id_str[lcid];
} else {
return std::string("INVALID_RB");
}
}
// RLC interface
void max_retx_attempted();
// Senders
void send_con_request();
void send_con_restablish_request();
void send_con_restablish_complete();
void send_con_setup_complete(byte_buffer_t *nas_msg);
void send_ul_info_transfer(uint32_t lcid, byte_buffer_t *sdu);
void send_security_mode_complete(uint32_t lcid, byte_buffer_t *pdu);
void send_rrc_con_reconfig_complete(uint32_t lcid, byte_buffer_t *pdu);
void send_rrc_ue_cap_info(uint32_t lcid, byte_buffer_t *pdu);
// Parsers
void parse_dl_ccch(byte_buffer_t *pdu);
void parse_dl_dcch(uint32_t lcid, byte_buffer_t *pdu);
void parse_dl_info_transfer(uint32_t lcid, byte_buffer_t *pdu);
// Helpers
void rrc_connection_release();
void con_restablish_cell_reselected();
void radio_link_failure();
static void* start_sib_thread(void *rrc_);
void sib_search();
void apply_sib2_configs(LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_2_STRUCT *sib2);
void handle_con_setup(LIBLTE_RRC_CONNECTION_SETUP_STRUCT *setup);
void handle_con_reest(LIBLTE_RRC_CONNECTION_REESTABLISHMENT_STRUCT *setup);
void handle_rrc_con_reconfig(uint32_t lcid, LIBLTE_RRC_CONNECTION_RECONFIGURATION_STRUCT *reconfig, byte_buffer_t *pdu);
void add_srb(LIBLTE_RRC_SRB_TO_ADD_MOD_STRUCT *srb_cnfg);
void add_drb(LIBLTE_RRC_DRB_TO_ADD_MOD_STRUCT *drb_cnfg);
void release_drb(uint8_t lcid);
void apply_rr_config_dedicated(LIBLTE_RRC_RR_CONFIG_DEDICATED_STRUCT *cnfg);
void apply_phy_config_dedicated(LIBLTE_RRC_PHYSICAL_CONFIG_DEDICATED_STRUCT *phy_cnfg, bool apply_defaults);
void apply_mac_config_dedicated(LIBLTE_RRC_MAC_MAIN_CONFIG_STRUCT *mac_cfg, bool apply_defaults);
// Helpers for setting default values
void set_phy_default_pucch_srs();
void set_phy_default();
void set_mac_default();
void set_rrc_default();
void set_bearers();
// s-tmsi persistent file
bool read_stimsi_file(LIBLTE_RRC_S_TMSI_STRUCT *s_tmsi);
bool write_stimsi_file(LIBLTE_RRC_S_TMSI_STRUCT s_tmsi);
};
} // namespace srsue
#endif // RRC_H
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