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srsRAN_4G/srsenb/hdr/upper/rrc.h

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/**
*
* \section COPYRIGHT
*
* Copyright 2013-2017 Software Radio Systems Limited
*
* \section LICENSE
*
* This file is part of srsLTE.
*
* 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 <map>
#include <queue>
#include "srslte/common/buffer_pool.h"
#include "srslte/common/common.h"
#include "srslte/common/block_queue.h"
#include "srslte/common/threads.h"
#include "srslte/common/timeout.h"
#include "srslte/common/log.h"
#include "srslte/interfaces/enb_interfaces.h"
#include "upper/common_enb.h"
#include "rrc_metrics.h"
namespace srsenb {
typedef struct {
uint32_t period;
LIBLTE_RRC_DSR_TRANS_MAX_ENUM dsr_max;
uint32_t nof_prb;
uint32_t sf_mapping[80];
uint32_t nof_subframes;
} rrc_cfg_sr_t;
typedef enum {
RRC_CFG_CQI_MODE_PERIODIC = 0,
RRC_CFG_CQI_MODE_APERIODIC,
RRC_CFG_CQI_MODE_N_ITEMS
} rrc_cfg_cqi_mode_t;
static const char rrc_cfg_cqi_mode_text[RRC_CFG_CQI_MODE_N_ITEMS][20] = {"periodic", "aperiodic"};
typedef struct {
uint32_t sf_mapping[80];
uint32_t nof_subframes;
uint32_t nof_prb;
uint32_t period;
bool simultaneousAckCQI;
rrc_cfg_cqi_mode_t mode;
} rrc_cfg_cqi_t;
typedef struct {
bool configured;
LIBLTE_RRC_UL_SPECIFIC_PARAMETERS_STRUCT lc_cfg;
LIBLTE_RRC_PDCP_CONFIG_STRUCT pdcp_cfg;
LIBLTE_RRC_RLC_CONFIG_STRUCT rlc_cfg;
} rrc_cfg_qci_t;
#define MAX_NOF_QCI 10
typedef struct {
LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_STRUCT sibs[LIBLTE_RRC_MAX_SIB];
LIBLTE_RRC_MAC_MAIN_CONFIG_STRUCT mac_cnfg;
LIBLTE_RRC_PUSCH_CONFIG_DEDICATED_STRUCT pusch_cfg;
LIBLTE_RRC_ANTENNA_INFO_DEDICATED_STRUCT antenna_info;
LIBLTE_RRC_PDSCH_CONFIG_P_A_ENUM pdsch_cfg;
rrc_cfg_sr_t sr_cfg;
rrc_cfg_cqi_t cqi_cfg;
rrc_cfg_qci_t qci_cfg[MAX_NOF_QCI];
srslte_cell_t cell;
uint32_t inactivity_timeout_ms;
}rrc_cfg_t;
static const char rrc_state_text[RRC_STATE_N_ITEMS][100] = {"IDLE",
"WAIT FOR CON SETUP COMPLETE",
"WAIT FOR SECURITY MODE COMPLETE",
"WAIT FOR UE CAPABILITIY INFORMATION",
"WAIT FOR CON RECONF COMPLETE",
"RRC CONNECTED"
"RELEASE REQUEST"};
class rrc : public rrc_interface_pdcp,
public rrc_interface_mac,
public rrc_interface_rlc,
public rrc_interface_s1ap,
public thread
{
public:
rrc() : act_monitor(this), cnotifier(NULL) {}
void init(rrc_cfg_t *cfg,
phy_interface_rrc *phy,
mac_interface_rrc *mac,
rlc_interface_rrc *rlc,
pdcp_interface_rrc *pdcp,
s1ap_interface_rrc *s1ap,
gtpu_interface_rrc *gtpu,
srslte::log *log_rrc);
void stop();
void get_metrics(rrc_metrics_t &m);
// rrc_interface_mac
void rl_failure(uint16_t rnti);
void add_user(uint16_t rnti);
void upd_user(uint16_t new_rnti, uint16_t old_rnti);
void set_activity_user(uint16_t rnti);
bool is_paging_opportunity(uint32_t tti, uint32_t *payload_len);
// rrc_interface_rlc
void read_pdu_bcch_dlsch(uint32_t sib_idx, uint8_t *payload);
void read_pdu_pcch(uint8_t *payload, uint32_t buffer_size);
void max_retx_attempted(uint16_t rnti);
// rrc_interface_s1ap
void write_dl_info(uint16_t rnti, srslte::byte_buffer_t *sdu);
void release_complete(uint16_t rnti);
bool setup_ue_ctxt(uint16_t rnti, LIBLTE_S1AP_MESSAGE_INITIALCONTEXTSETUPREQUEST_STRUCT *msg);
bool setup_ue_erabs(uint16_t rnti, LIBLTE_S1AP_MESSAGE_E_RABSETUPREQUEST_STRUCT *msg);
bool release_erabs(uint32_t rnti);
void add_paging_id(uint32_t ueid, LIBLTE_S1AP_UEPAGINGID_STRUCT UEPagingID);
// rrc_interface_pdcp
void write_pdu(uint16_t rnti, uint32_t lcid, srslte::byte_buffer_t *pdu);
void parse_sibs();
uint32_t get_nof_users();
// Notifier for user connect
class connect_notifier {
public:
virtual void user_connected(uint16_t rnti) = 0;
};
void set_connect_notifer(connect_notifier *cnotifier);
class activity_monitor : public thread
{
public:
activity_monitor(rrc* parent_);
void stop();
private:
rrc* parent;
bool running;
void run_thread();
};
class ue
{
public:
ue();
bool is_connected();
bool is_idle();
bool is_timeout();
void set_activity();
rrc_state_t get_state();
void send_connection_setup(bool is_setup = true);
void send_connection_reest();
void send_connection_release();
void send_connection_reest_rej();
void send_connection_reconf(srslte::byte_buffer_t *sdu);
void send_connection_reconf_new_bearer(LIBLTE_S1AP_E_RABTOBESETUPLISTBEARERSUREQ_STRUCT *e);
void send_connection_reconf_upd(srslte::byte_buffer_t *pdu);
void send_security_mode_command();
void send_ue_cap_enquiry();
void parse_ul_dcch(uint32_t lcid, srslte::byte_buffer_t* pdu);
void handle_rrc_con_req(LIBLTE_RRC_CONNECTION_REQUEST_STRUCT *msg);
void handle_rrc_con_reest_req(LIBLTE_RRC_CONNECTION_REESTABLISHMENT_REQUEST_STRUCT *msg);
void handle_rrc_con_setup_complete(LIBLTE_RRC_CONNECTION_SETUP_COMPLETE_STRUCT *msg, srslte::byte_buffer_t *pdu);
void handle_rrc_reconf_complete(LIBLTE_RRC_CONNECTION_RECONFIGURATION_COMPLETE_STRUCT *msg, srslte::byte_buffer_t *pdu);
void handle_security_mode_complete(LIBLTE_RRC_SECURITY_MODE_COMPLETE_STRUCT *msg);
void handle_security_mode_failure(LIBLTE_RRC_SECURITY_MODE_FAILURE_STRUCT *msg);
void handle_ue_cap_info(LIBLTE_RRC_UE_CAPABILITY_INFORMATION_STRUCT *msg);
void set_bitrates(LIBLTE_S1AP_UEAGGREGATEMAXIMUMBITRATE_STRUCT *rates);
void set_security_capabilities(LIBLTE_S1AP_UESECURITYCAPABILITIES_STRUCT *caps);
void set_security_key(uint8_t* key, uint32_t length);
bool setup_erabs(LIBLTE_S1AP_E_RABTOBESETUPLISTCTXTSUREQ_STRUCT *e);
bool setup_erabs(LIBLTE_S1AP_E_RABTOBESETUPLISTBEARERSUREQ_STRUCT *e);
void setup_erab(uint8_t id, LIBLTE_S1AP_E_RABLEVELQOSPARAMETERS_STRUCT *qos,
LIBLTE_S1AP_TRANSPORTLAYERADDRESS_STRUCT *addr, uint32_t teid_out,
LIBLTE_S1AP_NAS_PDU_STRUCT *nas_pdu);
bool release_erabs();
void notify_s1ap_ue_ctxt_setup_complete();
void notify_s1ap_ue_erab_setup_response(LIBLTE_S1AP_E_RABTOBESETUPLISTBEARERSUREQ_STRUCT *e);
int sr_allocate(uint32_t period, uint32_t *I_sr, uint32_t *N_pucch_sr);
void sr_get(uint32_t *I_sr, uint32_t *N_pucch_sr);
int sr_free();
int cqi_allocate(uint32_t period, uint32_t *pmi_idx, uint32_t *n_pucch);
void cqi_get(uint32_t *pmi_idx, uint32_t *n_pucch);
int cqi_free();
void send_dl_ccch(LIBLTE_RRC_DL_CCCH_MSG_STRUCT *dl_ccch_msg);
void send_dl_dcch(LIBLTE_RRC_DL_DCCH_MSG_STRUCT *dl_dcch_msg, srslte::byte_buffer_t *pdu = NULL);
uint16_t rnti;
rrc *parent;
bool connect_notified;
private:
struct timeval t_last_activity;
// S-TMSI for this UE
bool has_tmsi;
uint32_t m_tmsi;
uint8_t mmec;
uint8_t transaction_id;
rrc_state_t state;
std::map<uint32_t, LIBLTE_RRC_SRB_TO_ADD_MOD_STRUCT> srbs;
std::map<uint32_t, LIBLTE_RRC_DRB_TO_ADD_MOD_STRUCT> drbs;
uint8_t k_enb[32]; // Provided by MME
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;
LIBLTE_S1AP_UEAGGREGATEMAXIMUMBITRATE_STRUCT bitrates;
LIBLTE_S1AP_UESECURITYCAPABILITIES_STRUCT security_capabilities;
LIBLTE_RRC_UE_EUTRA_CAPABILITY_STRUCT eutra_capabilities;
typedef struct {
uint8_t id;
LIBLTE_S1AP_E_RABLEVELQOSPARAMETERS_STRUCT qos_params;
LIBLTE_S1AP_TRANSPORTLAYERADDRESS_STRUCT address;
uint32_t teid_out;
uint32_t teid_in;
}erab_t;
std::map<uint8_t, erab_t> erabs;
int sr_sched_sf_idx;
int sr_sched_prb_idx;
bool sr_allocated;
uint32_t sr_N_pucch;
uint32_t sr_I;
uint32_t cqi_pucch;
uint32_t cqi_idx;
bool cqi_allocated;
int cqi_sched_sf_idx;
int cqi_sched_prb_idx;
int get_drbid_config(LIBLTE_RRC_DRB_TO_ADD_MOD_STRUCT *drb, int drbid);
};
private:
std::map<uint16_t,ue> users;
std::map<uint32_t, LIBLTE_S1AP_UEPAGINGID_STRUCT > pending_paging;
activity_monitor act_monitor;
LIBLTE_BYTE_MSG_STRUCT sib_buffer[LIBLTE_RRC_MAX_SIB];
// user connect notifier
connect_notifier *cnotifier;
void rem_user(uint16_t rnti);
uint32_t generate_sibs();
void config_mac();
void parse_ul_dcch(uint16_t rnti, uint32_t lcid, srslte::byte_buffer_t *pdu);
void parse_ul_ccch(uint16_t rnti, srslte::byte_buffer_t *pdu);
void configure_security(uint16_t rnti,
uint32_t lcid,
uint8_t *k_rrc_enc,
uint8_t *k_rrc_int,
uint8_t *k_up_enc,
uint8_t *k_up_int,
srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo,
srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo);
srslte::byte_buffer_pool *pool;
srslte::bit_buffer_t bit_buf;
srslte::bit_buffer_t bit_buf_paging;
srslte::byte_buffer_t erab_info;
phy_interface_rrc *phy;
mac_interface_rrc *mac;
rlc_interface_rrc *rlc;
pdcp_interface_rrc *pdcp;
gtpu_interface_rrc *gtpu;
s1ap_interface_rrc *s1ap;
srslte::log *rrc_log;
typedef struct{
uint16_t rnti;
uint32_t lcid;
srslte::byte_buffer_t* pdu;
}rrc_pdu;
const static uint32_t LCID_REM_USER = 0xffff0001;
bool running;
static const int RRC_THREAD_PRIO = 7;
srslte::block_queue<rrc_pdu> rx_pdu_queue;
typedef struct {
uint32_t nof_users[100][80];
} sr_sched_t;
sr_sched_t sr_sched;
sr_sched_t cqi_sched;
rrc_cfg_t cfg;
uint32_t nof_si_messages;
LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_2_STRUCT sib2;
void run_thread();
void rem_user_thread(uint16_t rnti);
pthread_mutex_t user_mutex;
pthread_mutex_t paging_mutex;
};
} // namespace srsenb
#endif // RRC_H
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