mirror of https://github.com/PentHertz/srsLTE.git
rrc,nr: add MSG3 activity timer to rrc_nr
Signed-off-by: Carlo Galiotto <carlo@srs.io>
This commit is contained in:
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ceec108831
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4f6905363f
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@ -104,7 +104,27 @@ public:
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class ue
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{
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public:
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ue(rrc_nr* parent_, uint16_t rnti_, const sched_nr_ue_cfg_t& uecfg);
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enum activity_timeout_type_t {
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MSG3_RX_TIMEOUT = 0, ///< Msg3 has its own timeout to quickly remove fake UEs from random PRACHs
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UE_INACTIVITY_TIMEOUT, ///< (currently unused) UE inactivity timeout (usually bigger than reestablishment timeout)
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MSG5_RX_TIMEOUT, ///< (currently unused) for receiving RRCConnectionSetupComplete/RRCReestablishmentComplete
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nulltype
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};
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/// List of results a RRC procedure may produce.
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enum class procedure_result_code {
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none,
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activity_timeout,
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error_mme_not_connected,
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error_unknown_rnti,
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radio_conn_with_ue_lost,
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msg3_timeout,
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fail_in_radio_interface_proc,
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unspecified
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};
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/// @param [in] triggered_by_rach: indicates whether the UE is created as part of a RACH process
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ue(rrc_nr* parent_, uint16_t rnti_, const sched_nr_ue_cfg_t& uecfg, bool triggered_by_rach = false);
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void send_connection_setup();
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void send_dl_ccch(asn1::rrc_nr::dl_ccch_msg_s* dl_dcch_msg);
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@ -119,14 +139,23 @@ public:
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bool is_endc() { return endc; }
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uint16_t get_eutra_rnti() { return eutra_rnti; }
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void get_metrics(rrc_ue_metrics_t& ue_metrics) { ue_metrics = {}; /*TODO fill RRC metrics*/ };
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// setters
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int pack_rrc_reconfiguration();
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void deactivate_bearers();
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/// methods to handle activity timer
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std::string to_string(const activity_timeout_type_t& type);
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void set_activity_timeout(activity_timeout_type_t type);
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void set_activity(bool enabled = true);
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void activity_timer_expired(const activity_timeout_type_t type);
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private:
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rrc_nr* parent = nullptr;
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uint16_t rnti = SRSRAN_INVALID_RNTI;
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/// for basic DL/UL activity timeout
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srsran::unique_timer activity_timer;
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int pack_rrc_reconfiguration(asn1::dyn_octstring& packed_rrc_reconfig);
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int pack_secondary_cell_group_cfg(asn1::dyn_octstring& packed_secondary_cell_config);
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@ -179,6 +208,9 @@ public:
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rrc_nr_state_t state = rrc_nr_state_t::RRC_IDLE;
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uint8_t transaction_id = 0;
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/// Connection release result.
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procedure_result_code con_release_result = procedure_result_code::none;
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// RRC configs for UEs
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asn1::rrc_nr::cell_group_cfg_s cell_group_cfg;
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asn1::rrc_nr::radio_bearer_cfg_s radio_bearer_cfg;
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@ -161,7 +161,8 @@ rrc_nr_cfg_t rrc_nr::update_default_cfg(const rrc_nr_cfg_t& current)
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int rrc_nr::add_user(uint16_t rnti, const sched_nr_ue_cfg_t& uecfg)
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{
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if (users.count(rnti) == 0) {
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users.insert(std::make_pair(rnti, std::unique_ptr<ue>(new ue(this, rnti, uecfg))));
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// in the ue ctor, "triggered_by_rach" is set to true so as to start the MSG3 RX TIMEOUT when we create the ue
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users.insert(std::make_pair(rnti, std::unique_ptr<ue>(new ue(this, rnti, uecfg, true))));
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rlc->add_user(rnti);
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pdcp->add_user(rnti);
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logger.info("Added new user rnti=0x%x", rnti);
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@ -494,9 +495,9 @@ void rrc_nr::sgnb_addition_request(uint16_t eutra_rnti, const sgnb_addition_req_
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uecfg.carriers[0].cc = 0;
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uecfg.ue_bearers[0].direction = mac_lc_ch_cfg_t::BOTH;
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srsran::phy_cfg_nr_default_t::reference_cfg_t ref_args{};
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ref_args.duplex = cfg.cell_list[0].duplex_mode == SRSRAN_DUPLEX_MODE_TDD
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? srsran::phy_cfg_nr_default_t::reference_cfg_t::R_DUPLEX_TDD_CUSTOM_6_4
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: srsran::phy_cfg_nr_default_t::reference_cfg_t::R_DUPLEX_FDD;
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ref_args.duplex = cfg.cell_list[0].duplex_mode == SRSRAN_DUPLEX_MODE_TDD
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? srsran::phy_cfg_nr_default_t::reference_cfg_t::R_DUPLEX_TDD_CUSTOM_6_4
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: srsran::phy_cfg_nr_default_t::reference_cfg_t::R_DUPLEX_FDD;
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uecfg.phy_cfg = srsran::phy_cfg_nr_default_t{ref_args};
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uecfg.phy_cfg.csi = {}; // disable CSI until RA is complete
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@ -545,11 +546,95 @@ void rrc_nr::sgnb_release_request(uint16_t nr_rnti)
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Every function in UE class is called from a mutex environment thus does not
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need extra protection.
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*******************************************************************************/
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rrc_nr::ue::ue(rrc_nr* parent_, uint16_t rnti_, const sched_nr_ue_cfg_t& uecfg_) :
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rrc_nr::ue::ue(rrc_nr* parent_, uint16_t rnti_, const sched_nr_ue_cfg_t& uecfg_, bool triggered_by_rach) :
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parent(parent_), rnti(rnti_), uecfg(uecfg_)
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{
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// Derive UE cfg from rrc_cfg_nr_t
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uecfg.phy_cfg.pdcch = parent->cfg.cell_list[0].phy_cell.pdcch;
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// Set timer for MSG3_RX_TIMEOUT or UE_INACTIVITY_TIMEOUT
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activity_timer = parent->task_sched.get_unique_timer();
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triggered_by_rach ? set_activity_timeout(MSG3_RX_TIMEOUT) : set_activity_timeout(UE_INACTIVITY_TIMEOUT);
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}
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void rrc_nr::ue::set_activity_timeout(activity_timeout_type_t type)
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{
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uint32_t deadline_ms = 0;
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switch (type) {
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case MSG3_RX_TIMEOUT:
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// TODO: Retrieve the parameters from somewhere(RRC?) - Currently hardcoded to 100ms
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deadline_ms = 100;
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break;
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case UE_INACTIVITY_TIMEOUT:
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// TODO: Add a value for the inactivity timeout - currently no activity set this case
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return;
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default:
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parent->logger.error("Unknown timeout type %d", type);
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return;
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}
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// Currently we only set the timer for the MSG3_RX_TIMEOUT case
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activity_timer.set(deadline_ms, [this, type](uint32_t tid) { activity_timer_expired(type); });
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parent->logger.debug("Setting timer for %s for rnti=0x%x to %dms", to_string(type).c_str(), rnti, deadline_ms);
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set_activity();
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}
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void rrc_nr::ue::set_activity(bool enabled)
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{
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if (rnti == SRSRAN_MRNTI) {
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return;
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}
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if (not enabled) {
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if (activity_timer.is_running()) {
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parent->logger.debug("Inactivity timer interrupted for rnti=0x%x", rnti);
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}
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activity_timer.stop();
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return;
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}
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// re-start activity timer with current timeout value
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activity_timer.run();
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parent->logger.debug("Activity registered for rnti=0x%x (timeout_value=%dms)", rnti, activity_timer.duration());
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}
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void rrc_nr::ue::activity_timer_expired(const activity_timeout_type_t type)
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{
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parent->logger.info("Activity timer for rnti=0x%x expired after %d ms", rnti, activity_timer.time_elapsed());
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// TODO: Insert a check to ensure the RNTI exists
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#if 0
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if (parent->s1ap->user_exists(rnti)) {
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#endif
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switch (type) {
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case UE_INACTIVITY_TIMEOUT:
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// TODO: Add action to be executed
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break;
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case MSG3_RX_TIMEOUT:
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// MSG3 timeout, no need to notify S1AP, just remove UE
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parent->rem_user(rnti);
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con_release_result = procedure_result_code::msg3_timeout;
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break;
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default:
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// Unhandled activity timeout, just remove UE and log an error
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parent->rem_user(rnti);
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con_release_result = procedure_result_code::activity_timeout;
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parent->logger.error(
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"Unhandled reason for activity timer expiration. rnti=0x%x, cause %d", rnti, static_cast<unsigned>(type));
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}
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#if 0
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} else {
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parent->rem_user_thread(rnti);
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}
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#endif
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state = rrc_nr_state_t::RRC_IDLE;
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}
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std::string rrc_nr::ue::to_string(const activity_timeout_type_t& type)
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{
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constexpr static const char* options[] = {"Msg3 reception", "UE inactivity", "UE reestablishment"};
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return srsran::enum_to_text(options, (uint32_t)activity_timeout_type_t::nulltype, (uint32_t)type);
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}
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void rrc_nr::ue::send_connection_setup()
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@ -1289,6 +1374,10 @@ int rrc_nr::ue::handle_sgnb_addition_request(uint16_t eutra_rnti_, const sgnb_ad
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ack_params.eps_bearer_id = req_params.eps_bearer_id;
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parent->rrc_eutra->sgnb_addition_ack(eutra_rnti_, ack_params);
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// stop activity timer for msg3
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activity_timer.stop();
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parent->logger.debug("SgNB addition req. - Stopping MSG3 activity timer for rnti=0x%x", rnti);
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// recognize RNTI as ENDC user
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endc = true;
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eutra_rnti = eutra_rnti_;
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@ -1302,6 +1391,8 @@ void rrc_nr::ue::crnti_ce_received()
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if (endc) {
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// send SgNB addition complete for ENDC users
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parent->rrc_eutra->sgnb_addition_complete(eutra_rnti, rnti);
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activity_timer.stop();
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parent->logger.debug("Received MAC CE-RNTI for 0x%x - stopping MSG3 timer", rnti);
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// Add DRB1 to MAC
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for (auto& drb : cell_group_cfg.rlc_bearer_to_add_mod_list) {
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