mirror of https://github.com/PentHertz/srsLTE.git
1081 lines
47 KiB
C++
1081 lines
47 KiB
C++
/*
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE 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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* srsLTE 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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#include "srsenb/hdr/stack/rrc/rrc_mobility.h"
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#include "srsenb/hdr/stack/rrc/rrc_cell_cfg.h"
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#include "srslte/asn1/rrc_asn1_utils.h"
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#include "srslte/common/bcd_helpers.h"
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#include "srslte/common/common.h"
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#include <algorithm>
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#include <cstdio>
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#include <cstring>
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#include <functional>
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namespace srsenb {
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#define Info(fmt, ...) rrc_log->info("Mobility: " fmt, ##__VA_ARGS__)
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#define Error(fmt, ...) rrc_log->error("Mobility: " fmt, ##__VA_ARGS__)
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#define Warning(fmt, ...) rrc_log->warning("Mobility: " fmt, ##__VA_ARGS__)
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#define Debug(fmt, ...) rrc_log->debug("Mobility: " fmt, ##__VA_ARGS__)
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#define procInfo(fmt, ...) parent->rrc_log->info("Proc \"%s\" - " fmt, name(), ##__VA_ARGS__)
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#define procWarning(fmt, ...) parent->rrc_log->warning("Proc \"%s\" - " fmt, name(), ##__VA_ARGS__)
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#define procError(fmt, ...) parent->rrc_log->error("Proc \"%s\" - " fmt, name(), ##__VA_ARGS__)
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using namespace asn1::rrc;
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/*************************************************************************************************
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* Convenience Functions to handle ASN1 MeasObjs/MeasId/ReportCfg/Cells/etc.
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************************************************************************************************/
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namespace rrc_details {
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//! extract cell id from ECI
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uint32_t eci_to_cellid(uint32_t eci)
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{
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return eci & 0xFFu;
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}
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//! extract enb id from ECI
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uint32_t eci_to_enbid(uint32_t eci)
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{
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return (eci - eci_to_cellid(eci)) >> 8u;
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}
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uint16_t compute_mac_i(uint16_t crnti,
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uint32_t cellid,
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uint16_t pci,
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srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo,
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uint8_t* k_rrc_int)
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{
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// Compute shortMAC-I
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uint8_t varShortMAC_packed[16] = {};
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uint8_t mac_key[4] = {};
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// ASN.1 encode VarShortMAC-Input
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asn1::rrc::var_short_mac_input_s var_short_mac;
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var_short_mac.cell_id.from_number(cellid);
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var_short_mac.pci = pci;
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var_short_mac.c_rnti.from_number(crnti);
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asn1::bit_ref bref(varShortMAC_packed, sizeof(varShortMAC_packed));
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if (var_short_mac.pack(bref) == asn1::SRSASN_ERROR_ENCODE_FAIL) { // already zeroed, so no need to align
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printf("Error packing varShortMAC\n");
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}
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uint32_t N_bytes = bref.distance_bytes();
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printf("Encoded varShortMAC: cellId=0x%x, PCI=%d, rnti=0x%x (%d bytes)\n", cellid, pci, crnti, N_bytes);
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// Compute MAC-I
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switch (integ_algo) {
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case srslte::INTEGRITY_ALGORITHM_ID_128_EIA1:
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srslte::security_128_eia1(&k_rrc_int[16],
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0xffffffff, // 32-bit all to ones
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0x1f, // 5-bit all to ones
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1, // 1-bit to one
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varShortMAC_packed,
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N_bytes,
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mac_key);
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break;
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case srslte::INTEGRITY_ALGORITHM_ID_128_EIA2:
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srslte::security_128_eia2(&k_rrc_int[16],
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0xffffffff, // 32-bit all to ones
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0x1f, // 5-bit all to ones
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1, // 1-bit to one
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varShortMAC_packed,
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N_bytes,
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mac_key);
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break;
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default:
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printf("Unsupported integrity algorithm.\n");
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}
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uint16_t short_mac_i = (((uint16_t)mac_key[2] << 8u) | (uint16_t)mac_key[3]);
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return short_mac_i;
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}
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//! convenience function overload to extract Id from MeasObj/MeasId/ReportCfg/Cells
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constexpr uint8_t get_id(const cells_to_add_mod_s& obj)
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{
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return obj.cell_idx;
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}
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constexpr uint8_t get_id(const meas_obj_to_add_mod_s& obj)
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{
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return obj.meas_obj_id;
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}
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constexpr uint8_t get_id(const report_cfg_to_add_mod_s& obj)
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{
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return obj.report_cfg_id;
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}
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constexpr uint8_t get_id(const meas_id_to_add_mod_s& obj)
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{
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return obj.meas_id;
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}
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//! convenience function overload to print MeasObj/MeasId/etc. fields
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std::string to_string(const cells_to_add_mod_s& obj)
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{
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char buf[128];
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std::snprintf(
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buf, 128, "{cell_idx: %d, pci: %d, offset: %d}", obj.cell_idx, obj.pci, obj.cell_individual_offset.to_number());
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return {buf};
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}
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//! meas field comparison based on ID solely
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template <typename T>
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struct field_id_cmp {
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bool operator()(const T& lhs, const T& rhs) const { return get_id(lhs) < get_id(rhs); }
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template <typename IdType>
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bool operator()(const T& lhs, IdType id) const
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{
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return get_id(lhs) < id;
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}
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template <typename IdType>
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bool operator()(IdType id, const T& rhs) const
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{
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return id < get_id(rhs);
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}
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};
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using cell_id_cmp = field_id_cmp<cells_to_add_mod_s>;
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using meas_obj_id_cmp = field_id_cmp<meas_obj_to_add_mod_s>;
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using rep_cfg_id_cmp = field_id_cmp<report_cfg_to_add_mod_s>;
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using meas_id_cmp = field_id_cmp<meas_id_to_add_mod_s>;
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template <typename Container, typename IdType>
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typename Container::iterator binary_find(Container& c, IdType id)
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{
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auto it = std::lower_bound(c.begin(), c.end(), id, field_id_cmp<decltype(*c.begin())>{});
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return (it == c.end() or get_id(*it) != id) ? c.end() : it;
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}
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template <typename Container, typename IdType>
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typename Container::const_iterator binary_find(const Container& c, IdType id)
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{
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auto it = std::lower_bound(c.begin(), c.end(), id, field_id_cmp<decltype(*c.begin())>{});
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return (it == c.end() or get_id(*it) != id) ? c.end() : it;
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}
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//! Find MeasObj with same earfcn
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meas_obj_to_add_mod_s* find_meas_obj(meas_obj_to_add_mod_list_l& l, uint32_t earfcn)
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{
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auto same_earfcn = [earfcn](const meas_obj_to_add_mod_s& obj) {
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return obj.meas_obj.type().value == meas_obj_to_add_mod_s::meas_obj_c_::types_opts::meas_obj_eutra and
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obj.meas_obj.meas_obj_eutra().carrier_freq == earfcn;
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};
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auto it = std::find_if(l.begin(), l.end(), same_earfcn);
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if (it == l.end()) {
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return nullptr;
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}
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return it;
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}
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/** Finds a cell in this->objects based on cell_id and frequency
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* return pair of (meas_obj,cell_obj). If no cell has frequency==earfcn, meas_obj=nullptr
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*/
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std::pair<meas_obj_to_add_mod_s*, cells_to_add_mod_s*>
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find_cell(meas_obj_to_add_mod_list_l& l, uint32_t earfcn, uint8_t cell_id)
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{
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// find meas_obj with same earfcn
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meas_obj_to_add_mod_s* obj = rrc_details::find_meas_obj(l, earfcn);
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if (obj == nullptr) {
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return std::make_pair(obj, (cells_to_add_mod_s*)nullptr);
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}
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// find cell with same id
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auto& cells = obj->meas_obj.meas_obj_eutra().cells_to_add_mod_list;
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auto it = binary_find(cells, cell_id);
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if (it == cells.end()) {
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it = nullptr;
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}
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return std::make_pair(obj, it);
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}
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/**
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* Section 5.5.2.5
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* Description: Adds MeasObjtoAddMod to MeasCfg object
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*/
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meas_obj_to_add_mod_s* meascfg_add_meas_obj(meas_cfg_s* meas_cfg, const meas_obj_to_add_mod_s& meas_obj)
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{
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meas_cfg->meas_obj_to_add_mod_list_present = true;
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meas_obj_to_add_mod_list_l& l = meas_cfg->meas_obj_to_add_mod_list;
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// search for meas_obj by obj_id to ensure uniqueness (assume sorted)
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auto found_it = binary_find(l, meas_obj.meas_obj_id);
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// TODO: Assert dl_earfcn is the same
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if (found_it == l.end()) {
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l.push_back({});
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found_it = &l.back();
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found_it->meas_obj_id = meas_obj.meas_obj_id;
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}
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auto& target_eutra = found_it->meas_obj.set_meas_obj_eutra();
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auto& src_eutra = meas_obj.meas_obj.meas_obj_eutra();
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target_eutra.carrier_freq = src_eutra.carrier_freq;
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target_eutra.offset_freq_present = src_eutra.offset_freq_present;
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target_eutra.offset_freq = src_eutra.offset_freq;
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target_eutra.allowed_meas_bw = src_eutra.allowed_meas_bw;
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target_eutra.presence_ant_port1 = src_eutra.presence_ant_port1;
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target_eutra.neigh_cell_cfg = src_eutra.neigh_cell_cfg;
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// do not add cellsToAddModList, blacCells, whiteCells, etc. according to (5.5.2.5 1|1|1)
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return found_it;
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}
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/*
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* Algorithm to compare differences between Meas Fields. This is used for MeasObjs, Cells, ReportConfig, MeasId (and
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* more in the future)
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* Returns outcome==same_id, if two fields were spotted with same id, "id_removed" if an id was removed from the target
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* "id_added" if an id was added to the target, and complete when the iteration is over
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*/
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enum class diff_outcome_t { same_id, id_removed, id_added, complete };
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template <typename Container>
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struct compute_diff_generator {
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using const_iterator = typename Container::const_iterator;
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struct result_t {
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diff_outcome_t outcome;
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const_iterator src_it;
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const_iterator target_it;
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};
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compute_diff_generator(const Container& src, const Container& target) :
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src_it(src.begin()),
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src_end(src.end()),
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target_it(target.begin()),
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target_end(target.end())
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{}
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result_t next()
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{
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bool src_left = src_it != src_end;
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bool target_left = target_it != target_end;
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if (not src_left and not target_left) {
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return {diff_outcome_t::complete, nullptr, nullptr};
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}
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if (not target_left or (src_left and get_id(*src_it) < get_id(*target_it))) {
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// an object has been removed from the target
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return {diff_outcome_t::id_removed, src_it++, target_it};
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}
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if (not src_left or (target_left and get_id(*src_it) > get_id(*target_it))) {
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// a new object has been added to target
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return {diff_outcome_t::id_added, src_it, target_it++};
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}
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// Same ID
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return {diff_outcome_t::same_id, src_it++, target_it++};
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}
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private:
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const_iterator src_it, src_end, target_it, target_end;
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};
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//! Find a Gap in Ids in a list of Meas Fields
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template <typename Container, typename IdType = decltype(get_id(*Container{}.begin()))>
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IdType find_id_gap(const Container& c)
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{
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auto prev_it = c.begin();
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if (prev_it != c.end() and get_id(*prev_it) == 1) {
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auto it = prev_it;
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for (++it; it != c.end(); prev_it = it, ++it) {
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if (get_id(*it) > get_id(*prev_it) + 1) {
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break;
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}
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}
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}
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return (prev_it == c.end()) ? 1 : get_id(*prev_it) + 1; // starts at 1.
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}
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} // namespace rrc_details
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/*************************************************************************************************
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* var_meas_cfg_t class
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************************************************************************************************/
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//! Add cell parsed in configuration file to the varMeasCfg
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std::tuple<bool, var_meas_cfg_t::meas_obj_t*, var_meas_cfg_t::meas_cell_t*>
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var_meas_cfg_t::add_cell_cfg(const meas_cell_cfg_t& cellcfg)
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{
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using namespace rrc_details;
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bool inserted_flag = true;
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// TODO: cellcfg.eci is the ECI
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uint32_t cell_id = rrc_details::eci_to_cellid(cellcfg.eci);
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q_offset_range_e offset;
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asn1::number_to_enum(offset, (int8_t)cellcfg.q_offset); // TODO: What's the difference
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std::pair<meas_obj_t*, meas_cell_t*> ret = rrc_details::find_cell(var_meas.meas_obj_list, cellcfg.earfcn, cell_id);
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cells_to_add_mod_s new_cell;
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new_cell.cell_idx = cell_id;
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new_cell.cell_individual_offset = offset;
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new_cell.pci = cellcfg.pci;
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if (ret.first != nullptr) {
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// there are cells with the same earfcn at least.
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if (ret.second != nullptr) {
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// the cell already existed.
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if (ret.second->pci != cellcfg.pci or ret.second->cell_individual_offset != offset) {
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// members of cell were updated
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*ret.second = new_cell;
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} else {
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inserted_flag = false;
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}
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} else {
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// eci not found. create new cell
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auto& cell_list = ret.first->meas_obj.meas_obj_eutra().cells_to_add_mod_list;
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cell_list.push_back(new_cell);
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std::sort(cell_list.begin(), cell_list.end(), rrc_details::cell_id_cmp{});
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// find cell in new position
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ret.second = std::lower_bound(cell_list.begin(), cell_list.end(), new_cell.cell_idx, rrc_details::cell_id_cmp{});
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}
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} else {
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// no measobj has been found with same earfcn, create a new one
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meas_obj_t new_obj;
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new_obj.meas_obj_id = rrc_details::find_id_gap(var_meas.meas_obj_list);
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asn1::rrc::meas_obj_eutra_s& eutra = new_obj.meas_obj.set_meas_obj_eutra();
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eutra.carrier_freq = cellcfg.earfcn;
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eutra.allowed_meas_bw.value = asn1::rrc::allowed_meas_bw_e::mbw6; // TODO: What value to add here?
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eutra.neigh_cell_cfg.from_number(1); // TODO: What value?
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eutra.offset_freq_present = true;
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// TODO: Assert that q_offset is in ms
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asn1::number_to_enum(eutra.offset_freq, cellcfg.q_offset);
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eutra.cells_to_add_mod_list_present = true;
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eutra.cells_to_add_mod_list.push_back(new_cell);
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var_meas.meas_obj_list.push_back(new_obj);
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std::sort(var_meas.meas_obj_list.begin(), var_meas.meas_obj_list.end(), rrc_details::meas_obj_id_cmp{});
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// get measObj in new position
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ret.first = std::lower_bound(var_meas.meas_obj_list.begin(),
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var_meas.meas_obj_list.end(),
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new_obj.meas_obj_id,
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rrc_details::meas_obj_id_cmp{});
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ret.second = &ret.first->meas_obj.meas_obj_eutra().cells_to_add_mod_list.back();
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}
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if (inserted_flag) {
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var_meas.meas_obj_list_present = true;
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}
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return std::make_tuple(inserted_flag, ret.first, ret.second);
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}
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report_cfg_to_add_mod_s* var_meas_cfg_t::add_report_cfg(const report_cfg_eutra_s& reportcfg)
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{
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rrc_details::field_id_cmp<report_cfg_to_add_mod_s> cmp{};
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report_cfg_to_add_mod_s new_rep;
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new_rep.report_cfg_id = rrc_details::find_id_gap(var_meas.report_cfg_list);
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new_rep.report_cfg.set_report_cfg_eutra() = reportcfg;
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var_meas.report_cfg_list_present = true;
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var_meas.report_cfg_list.push_back(new_rep);
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std::sort(var_meas.report_cfg_list.begin(), var_meas.report_cfg_list.end(), cmp);
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return std::lower_bound(var_meas.report_cfg_list.begin(), var_meas.report_cfg_list.end(), new_rep.report_cfg_id, cmp);
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}
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meas_id_to_add_mod_s* var_meas_cfg_t::add_measid_cfg(uint8_t measobjid, uint8_t measrepid)
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{
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// ensure MeasObjId and ReportCfgId already exist
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auto objit = std::lower_bound(
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var_meas.meas_obj_list.begin(), var_meas.meas_obj_list.end(), measobjid, rrc_details::meas_obj_id_cmp{});
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if (objit == var_meas.meas_obj_list.end() or objit->meas_obj_id != measobjid) {
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ERROR("Failed to add MeasId because MeasObjId=%d is not found.\n", measobjid);
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return nullptr;
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}
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auto repit = std::lower_bound(
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var_meas.report_cfg_list.begin(), var_meas.report_cfg_list.end(), measrepid, rrc_details::rep_cfg_id_cmp{});
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if (repit == var_meas.report_cfg_list.end() or repit->report_cfg_id != measrepid) {
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ERROR("Failed to add MeasId because ReportCfgId=%d is not found.\n", measrepid);
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return nullptr;
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}
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rrc_details::field_id_cmp<meas_id_to_add_mod_s> cmp{};
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meas_id_to_add_mod_s new_measid;
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new_measid.report_cfg_id = measrepid;
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new_measid.meas_obj_id = measobjid;
|
|
new_measid.meas_id = rrc_details::find_id_gap(var_meas.meas_id_list);
|
|
|
|
var_meas.meas_id_list_present = true;
|
|
var_meas.meas_id_list.push_back(new_measid);
|
|
std::sort(var_meas.meas_id_list.begin(), var_meas.meas_id_list.end(), cmp);
|
|
return std::lower_bound(var_meas.meas_id_list.begin(), var_meas.meas_id_list.end(), new_measid.meas_id, cmp);
|
|
}
|
|
|
|
asn1::rrc::quant_cfg_s* var_meas_cfg_t::add_quant_cfg(const asn1::rrc::quant_cfg_eutra_s& quantcfg)
|
|
{
|
|
var_meas.quant_cfg_present = true;
|
|
var_meas.quant_cfg.quant_cfg_eutra_present = true;
|
|
var_meas.quant_cfg.quant_cfg_eutra = quantcfg;
|
|
return &var_meas.quant_cfg;
|
|
}
|
|
|
|
bool var_meas_cfg_t::compute_diff_meas_cfg(const var_meas_cfg_t& target_cfg, asn1::rrc::meas_cfg_s* meas_cfg) const
|
|
{
|
|
*meas_cfg = {};
|
|
|
|
// Shortcut in case this is the same as target
|
|
if (this == &target_cfg) {
|
|
return false;
|
|
}
|
|
|
|
// Set a MeasConfig in the RRC Connection Reconfiguration for HO.
|
|
compute_diff_meas_objs(target_cfg, meas_cfg);
|
|
compute_diff_report_cfgs(target_cfg, meas_cfg);
|
|
compute_diff_meas_ids(target_cfg, meas_cfg);
|
|
compute_diff_quant_cfg(target_cfg, meas_cfg);
|
|
meas_cfg->meas_gap_cfg_present = false; // NOTE: we do not support inter-freq. HO
|
|
meas_cfg->s_measure_present = false; // NOTE: We do not support SCells
|
|
meas_cfg->pre_regist_info_hrpd_present = false; // NOTE: not supported
|
|
meas_cfg->speed_state_pars_present = false; // NOTE: not supported
|
|
|
|
bool diff = meas_cfg->meas_obj_to_add_mod_list_present;
|
|
diff |= meas_cfg->meas_obj_to_rem_list_present;
|
|
diff |= meas_cfg->report_cfg_to_add_mod_list_present;
|
|
diff |= meas_cfg->report_cfg_to_rem_list_present;
|
|
diff |= meas_cfg->meas_id_to_add_mod_list_present;
|
|
diff |= meas_cfg->meas_id_to_rem_list_present;
|
|
diff |= meas_cfg->quant_cfg_present;
|
|
diff |= meas_cfg->meas_gap_cfg_present;
|
|
diff |= meas_cfg->s_measure_present;
|
|
diff |= meas_cfg->pre_regist_info_hrpd_present;
|
|
diff |= meas_cfg->speed_state_pars_present;
|
|
return diff;
|
|
}
|
|
|
|
//! adds all the cells that got updated to MeasCfg.
|
|
void var_meas_cfg_t::compute_diff_cells(const meas_obj_eutra_s& target_it,
|
|
const meas_obj_eutra_s& src_it,
|
|
meas_obj_to_add_mod_s* added_obj) const
|
|
{
|
|
rrc_details::compute_diff_generator<cells_to_add_mod_list_l> diffs{src_it.cells_to_add_mod_list,
|
|
target_it.cells_to_add_mod_list};
|
|
|
|
meas_obj_eutra_s* eutra_obj = &added_obj->meas_obj.meas_obj_eutra();
|
|
while (true) {
|
|
auto result = diffs.next();
|
|
switch (result.outcome) {
|
|
case rrc_details::diff_outcome_t::complete:
|
|
return;
|
|
case rrc_details::diff_outcome_t::id_removed:
|
|
// case "entry with matching cellIndex exists in cellsToRemoveList
|
|
Info("UE can now cease to measure activity of cell %s.\n", rrc_details::to_string(*result.src_it).c_str());
|
|
eutra_obj->cells_to_rem_list_present = true;
|
|
eutra_obj->cells_to_rem_list.push_back(result.src_it->cell_idx);
|
|
break;
|
|
case rrc_details::diff_outcome_t::id_added:
|
|
// case "entry with matching cellIndex doesn't exist in cellsToAddModList"
|
|
Info("UE has now to measure activity of %s.\n", rrc_details::to_string(*result.target_it).c_str());
|
|
eutra_obj->cells_to_add_mod_list_present = true;
|
|
eutra_obj->cells_to_add_mod_list.push_back(*result.target_it);
|
|
break;
|
|
case rrc_details::diff_outcome_t::same_id:
|
|
if (not(*result.src_it == *result.target_it)) {
|
|
// case "entry with matching cellIndex exists in cellsToAddModList"
|
|
Info("UE has now to measure activity of %s with updated params.\n",
|
|
rrc_details::to_string(*result.target_it).c_str());
|
|
eutra_obj->cells_to_add_mod_list_present = true;
|
|
eutra_obj->cells_to_add_mod_list.push_back(*result.target_it);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Section 5.5.2.4/5, Measurement Object removal and addition/modification
|
|
* Description: compute diff between target_cfg and var_meas -> depending on diff, add/remove/update meas_obj in
|
|
* meas_cfg
|
|
*/
|
|
void var_meas_cfg_t::compute_diff_meas_objs(const var_meas_cfg_t& target_cfg, meas_cfg_s* meas_cfg) const
|
|
{
|
|
if (not target_cfg.var_meas.meas_obj_list_present) {
|
|
return;
|
|
}
|
|
// TODO: black cells and white cells
|
|
rrc_details::compute_diff_generator<meas_obj_to_add_mod_list_l> diffs{var_meas.meas_obj_list,
|
|
target_cfg.var_meas.meas_obj_list};
|
|
|
|
while (true) {
|
|
auto result = diffs.next();
|
|
switch (result.outcome) {
|
|
case rrc_details::diff_outcome_t::complete:
|
|
return;
|
|
case rrc_details::diff_outcome_t::id_removed:
|
|
// case "entry with matching cellIndex exists in cellsToRemoveList
|
|
Info("UE can cease to measure activity in frequency earfcn=%d.\n",
|
|
result.src_it->meas_obj.meas_obj_eutra().carrier_freq);
|
|
meas_cfg->meas_obj_to_rem_list_present = true;
|
|
meas_cfg->meas_obj_to_rem_list.push_back(result.src_it->meas_obj_id);
|
|
break;
|
|
case rrc_details::diff_outcome_t::id_added: {
|
|
// case "entry with matching measObjectId doesn't exist in measObjToAddModList"
|
|
Info("UE has now to measure activity of new frequency earfcn=%d.\n",
|
|
result.target_it->meas_obj.meas_obj_eutra().carrier_freq);
|
|
auto& target_eutra = result.target_it->meas_obj.meas_obj_eutra();
|
|
auto& added_eutra = rrc_details::meascfg_add_meas_obj(meas_cfg, *result.target_it)->meas_obj.meas_obj_eutra();
|
|
// add all cells in measCfg
|
|
for (const cells_to_add_mod_s& cell_it : target_eutra.cells_to_add_mod_list) {
|
|
added_eutra.cells_to_add_mod_list_present = true;
|
|
added_eutra.cells_to_add_mod_list.push_back(cell_it);
|
|
}
|
|
} break;
|
|
case rrc_details::diff_outcome_t::same_id:
|
|
// case "entry with matching measObjectId exists in measObjToAddModList"
|
|
bool are_equal = *result.src_it == *result.target_it;
|
|
if (not are_equal) {
|
|
// if we found a difference in obj IDs
|
|
meas_obj_to_add_mod_s* added_obj = rrc_details::meascfg_add_meas_obj(meas_cfg, *result.target_it);
|
|
// Add cells if there were changes.
|
|
compute_diff_cells(
|
|
result.target_it->meas_obj.meas_obj_eutra(), result.src_it->meas_obj.meas_obj_eutra(), added_obj);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Section 5.5.2.6/7 - Reporting configuration removal and addition/modification
|
|
*/
|
|
void var_meas_cfg_t::compute_diff_report_cfgs(const var_meas_cfg_t& target_cfg, asn1::rrc::meas_cfg_s* meas_cfg) const
|
|
{
|
|
if (not target_cfg.var_meas.report_cfg_list_present) {
|
|
return;
|
|
}
|
|
rrc_details::compute_diff_generator<report_cfg_to_add_mod_list_l> diffs{var_meas.report_cfg_list,
|
|
target_cfg.var_meas.report_cfg_list};
|
|
|
|
while (true) {
|
|
auto result = diffs.next();
|
|
switch (result.outcome) {
|
|
case rrc_details::diff_outcome_t::complete:
|
|
return;
|
|
case rrc_details::diff_outcome_t::id_removed:
|
|
meas_cfg->report_cfg_to_rem_list_present = true;
|
|
meas_cfg->report_cfg_to_rem_list.push_back(result.src_it->report_cfg_id);
|
|
break;
|
|
case rrc_details::diff_outcome_t::id_added:
|
|
meas_cfg->report_cfg_to_add_mod_list_present = true;
|
|
meas_cfg->report_cfg_to_add_mod_list.push_back(*result.target_it);
|
|
break;
|
|
case rrc_details::diff_outcome_t::same_id:
|
|
if (not(*result.src_it == *result.target_it)) {
|
|
meas_cfg->report_cfg_to_add_mod_list_present = true;
|
|
meas_cfg->report_cfg_to_add_mod_list.push_back(*result.target_it);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void var_meas_cfg_t::compute_diff_meas_ids(const var_meas_cfg_t& target_cfg, asn1::rrc::meas_cfg_s* meas_cfg) const
|
|
{
|
|
if (not target_cfg.var_meas.meas_id_list_present) {
|
|
return;
|
|
}
|
|
rrc_details::compute_diff_generator<meas_id_to_add_mod_list_l> diffs{var_meas.meas_id_list,
|
|
target_cfg.var_meas.meas_id_list};
|
|
|
|
while (true) {
|
|
auto result = diffs.next();
|
|
switch (result.outcome) {
|
|
case rrc_details::diff_outcome_t::complete:
|
|
return;
|
|
case rrc_details::diff_outcome_t::id_removed:
|
|
meas_cfg->meas_id_to_rem_list_present = true;
|
|
meas_cfg->meas_id_to_rem_list.push_back(result.src_it->meas_id);
|
|
break;
|
|
case rrc_details::diff_outcome_t::id_added:
|
|
meas_cfg->meas_id_to_add_mod_list_present = true;
|
|
meas_cfg->meas_id_to_add_mod_list.push_back(*result.target_it);
|
|
break;
|
|
case rrc_details::diff_outcome_t::same_id:
|
|
if (not(*result.src_it == *result.target_it)) {
|
|
meas_cfg->meas_id_to_add_mod_list_present = true;
|
|
meas_cfg->meas_id_to_add_mod_list.push_back(*result.target_it);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void var_meas_cfg_t::compute_diff_quant_cfg(const var_meas_cfg_t& target_cfg, asn1::rrc::meas_cfg_s* meas_cfg_msg) const
|
|
{
|
|
if (target_cfg.var_meas.quant_cfg_present and
|
|
(not var_meas.quant_cfg_present or not(target_cfg.var_meas.quant_cfg == var_meas.quant_cfg))) {
|
|
meas_cfg_msg->quant_cfg_present = true;
|
|
meas_cfg_msg->quant_cfg = target_cfg.var_meas.quant_cfg;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Convert MeasCfg asn1 struct to var_meas_cfg_t
|
|
* @param meas_cfg
|
|
* @return
|
|
*/
|
|
var_meas_cfg_t var_meas_cfg_t::make(const asn1::rrc::meas_cfg_s& meas_cfg)
|
|
{
|
|
var_meas_cfg_t var;
|
|
if (meas_cfg.meas_id_to_add_mod_list_present) {
|
|
var.var_meas.meas_id_list_present = true;
|
|
var.var_meas.meas_id_list = meas_cfg.meas_id_to_add_mod_list;
|
|
}
|
|
if (meas_cfg.meas_obj_to_add_mod_list_present) {
|
|
var.var_meas.meas_obj_list_present = true;
|
|
var.var_meas.meas_obj_list = meas_cfg.meas_obj_to_add_mod_list;
|
|
}
|
|
if (meas_cfg.report_cfg_to_add_mod_list_present) {
|
|
var.var_meas.report_cfg_list_present = true;
|
|
var.var_meas.report_cfg_list = meas_cfg.report_cfg_to_add_mod_list;
|
|
}
|
|
if (meas_cfg.quant_cfg_present) {
|
|
var.var_meas.quant_cfg_present = true;
|
|
var.var_meas.quant_cfg = meas_cfg.quant_cfg;
|
|
}
|
|
if (meas_cfg.report_cfg_to_rem_list_present or meas_cfg.meas_obj_to_rem_list_present or
|
|
meas_cfg.meas_id_to_rem_list_present) {
|
|
srslte::logmap::get("RRC")->warning("Remove lists not handled by the var_meas_cfg_t method\n");
|
|
}
|
|
return var;
|
|
}
|
|
|
|
/*************************************************************************************************
|
|
* mobility_cfg class
|
|
************************************************************************************************/
|
|
|
|
rrc::enb_mobility_handler::enb_mobility_handler(rrc* rrc_) : rrc_ptr(rrc_), cfg(&rrc_->cfg)
|
|
{
|
|
cell_meas_cfg_list.resize(cfg->cell_list.size());
|
|
|
|
/* Create Template Cell VarMeasCfg List */
|
|
|
|
for (size_t i = 0; i < cfg->cell_list.size(); ++i) {
|
|
std::unique_ptr<var_meas_cfg_t> var_meas{new var_meas_cfg_t{}};
|
|
|
|
if (cfg->meas_cfg_present) {
|
|
// inserts all neighbor cells
|
|
for (const meas_cell_cfg_t& meascell : cfg->cell_list[i].meas_cfg.meas_cells) {
|
|
var_meas->add_cell_cfg(meascell);
|
|
}
|
|
|
|
// insert same report cfg for all cells
|
|
for (const report_cfg_eutra_s& reportcfg : cfg->cell_list[i].meas_cfg.meas_reports) {
|
|
var_meas->add_report_cfg(reportcfg);
|
|
}
|
|
|
|
// insert all meas ids
|
|
// TODO: add this to the parser
|
|
if (var_meas->rep_cfgs().size() > 0) {
|
|
for (const auto& measobj : var_meas->meas_objs()) {
|
|
var_meas->add_measid_cfg(measobj.meas_obj_id, var_meas->rep_cfgs().begin()->report_cfg_id);
|
|
}
|
|
}
|
|
|
|
// insert quantity config
|
|
var_meas->add_quant_cfg(cfg->cell_list[i].meas_cfg.quant_cfg);
|
|
}
|
|
|
|
cell_meas_cfg_list[i].reset(var_meas.release());
|
|
}
|
|
}
|
|
|
|
/*************************************************************************************************
|
|
* rrc_mobility class
|
|
************************************************************************************************/
|
|
|
|
rrc::ue::rrc_mobility::rrc_mobility(rrc::ue* outer_ue) :
|
|
rrc_ue(outer_ue),
|
|
rrc_enb(outer_ue->parent),
|
|
cfg(outer_ue->parent->enb_mobility_cfg.get()),
|
|
pool(outer_ue->pool),
|
|
rrc_log(outer_ue->parent->rrc_log),
|
|
source_ho_proc(this),
|
|
ue_var_meas(std::make_shared<var_meas_cfg_t>())
|
|
{}
|
|
|
|
//! Method to add Mobility Info to a RRC Connection Reconfiguration Message
|
|
bool rrc::ue::rrc_mobility::fill_conn_recfg_msg(asn1::rrc::rrc_conn_recfg_r8_ies_s* conn_recfg)
|
|
{
|
|
// only reconfigure meas_cfg if no handover is occurring.
|
|
// NOTE: We basically freeze ue_var_meas for the whole duration of the handover procedure
|
|
if (source_ho_proc.is_busy()) {
|
|
return false;
|
|
}
|
|
|
|
// Check if there has been any update in ue_var_meas
|
|
cell_info_common* pcell = rrc_ue->get_ue_cc_cfg(UE_PCELL_CC_IDX);
|
|
asn1::rrc::meas_cfg_s& meas_cfg = conn_recfg->meas_cfg;
|
|
conn_recfg->meas_cfg_present = update_ue_var_meas_cfg(*ue_var_meas, pcell->enb_cc_idx, &meas_cfg);
|
|
return conn_recfg->meas_cfg_present;
|
|
}
|
|
|
|
//! Method called whenever the eNB receives a MeasReport from the UE. In normal situations, an HO procedure is started
|
|
void rrc::ue::rrc_mobility::handle_ue_meas_report(const meas_report_s& msg)
|
|
{
|
|
const meas_results_s& meas_res = msg.crit_exts.c1().meas_report_r8().meas_results;
|
|
|
|
const meas_id_to_add_mod_list_l& l = ue_var_meas->meas_ids();
|
|
auto measid_it = rrc_details::binary_find(l, meas_res.meas_id);
|
|
if (measid_it == l.end()) {
|
|
Warning("The measurement ID %d provided by the UE does not exist.\n", meas_res.meas_id);
|
|
return;
|
|
}
|
|
if (not meas_res.meas_result_neigh_cells_present) {
|
|
Info("Received a MeasReport, but the UE did not detect any cell.\n");
|
|
return;
|
|
}
|
|
if (meas_res.meas_result_neigh_cells.type().value !=
|
|
meas_results_s::meas_result_neigh_cells_c_::types::meas_result_list_eutra) {
|
|
Error("MeasReports regarding non-EUTRA are not supported!\n");
|
|
return;
|
|
}
|
|
|
|
const meas_obj_to_add_mod_list_l& objs = ue_var_meas->meas_objs();
|
|
// const report_cfg_to_add_mod_list_l& reps = ue_var_meas->rep_cfgs();
|
|
auto obj_it = rrc_details::binary_find(objs, measid_it->meas_obj_id);
|
|
// auto rep_it = rrc_details::binary_find(reps, measid_it->report_cfg_id);
|
|
const meas_result_list_eutra_l& eutra_list = meas_res.meas_result_neigh_cells.meas_result_list_eutra();
|
|
|
|
// iterate from strongest to weakest cell
|
|
// NOTE: From now we just look at the strongest.
|
|
if (eutra_list.size() > 0) {
|
|
uint32_t i = 0;
|
|
|
|
uint16_t pci = eutra_list[i].pci;
|
|
const cells_to_add_mod_list_l& cells = obj_it->meas_obj.meas_obj_eutra().cells_to_add_mod_list;
|
|
|
|
const cells_to_add_mod_s* cell_it =
|
|
std::find_if(cells.begin(), cells.end(), [pci](const cells_to_add_mod_s& c) { return c.pci == pci; });
|
|
if (cell_it == cells.end()) {
|
|
rrc_log->error("The PCI=%d inside the MeasReport is not recognized.\n", pci);
|
|
return;
|
|
}
|
|
|
|
// eNB found the respective cell. eNB takes "HO Decision"
|
|
// TODO: check what to do here to take the decision.
|
|
// NOTE: for now just accept anything.
|
|
|
|
// NOTE: Handover disabled
|
|
// Target cell to handover to was selected.
|
|
// auto& L = rrc_enb->cfg.cell_list[rrc_ue->get_ue_cc_cfg(UE_PCELL_CC_IDX)->enb_cc_idx].meas_cfg.meas_cells;
|
|
// uint32_t target_eci = std::find_if(L.begin(), L.end(), [pci](meas_cell_cfg_t& c) { return c.pci == pci;
|
|
// })->eci; if (not source_ho_proc.launch(*measid_it, *obj_it, *rep_it, *cell_it, eutra_list[i], target_eci)) {
|
|
// Error("Failed to start HO procedure, as it is already on-going\n");
|
|
// return;
|
|
// }
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Description: Send "HO Required" message from source eNB to MME
|
|
* - 1st Message of the handover preparation phase
|
|
* - The RRC stores info regarding the source eNB configuration in a HO Preparation Info struct
|
|
* - This struct goes in a transparent container to the S1AP
|
|
*/
|
|
bool rrc::ue::rrc_mobility::start_ho_preparation(uint32_t target_eci,
|
|
uint8_t measobj_id,
|
|
bool fwd_direct_path_available)
|
|
{
|
|
if (fwd_direct_path_available) {
|
|
Error("Direct tunnels not supported supported\n");
|
|
return false;
|
|
}
|
|
|
|
srslte::plmn_id_t target_plmn =
|
|
srslte::make_plmn_id_t(rrc_enb->cfg.sib1.cell_access_related_info.plmn_id_list[0].plmn_id);
|
|
|
|
/*** Fill HO Preparation Info ***/
|
|
asn1::rrc::ho_prep_info_s hoprep;
|
|
asn1::rrc::ho_prep_info_r8_ies_s& hoprep_r8 = hoprep.crit_exts.set_c1().set_ho_prep_info_r8();
|
|
if (not rrc_ue->eutra_capabilities_unpacked) {
|
|
// TODO: temporary. Made up something to please target eNB. (there must be at least one capability in this packet)
|
|
hoprep_r8.ue_radio_access_cap_info.resize(1);
|
|
hoprep_r8.ue_radio_access_cap_info[0].rat_type = asn1::rrc::rat_type_e::eutra;
|
|
asn1::rrc::ue_eutra_cap_s capitem;
|
|
capitem.access_stratum_release = asn1::rrc::access_stratum_release_e::rel8;
|
|
capitem.ue_category = 4;
|
|
capitem.pdcp_params.max_num_rohc_context_sessions_present = true;
|
|
capitem.pdcp_params.max_num_rohc_context_sessions = asn1::rrc::pdcp_params_s::max_num_rohc_context_sessions_e_::cs2;
|
|
bzero(&capitem.pdcp_params.supported_rohc_profiles,
|
|
sizeof(asn1::rrc::rohc_profile_support_list_r15_s)); // TODO: why is it r15?
|
|
capitem.phy_layer_params.ue_specific_ref_sigs_supported = false;
|
|
capitem.phy_layer_params.ue_tx_ant_sel_supported = false;
|
|
capitem.rf_params.supported_band_list_eutra.resize(1);
|
|
capitem.rf_params.supported_band_list_eutra[0].band_eutra = 7;
|
|
capitem.rf_params.supported_band_list_eutra[0].half_duplex = false;
|
|
capitem.meas_params.band_list_eutra.resize(1);
|
|
capitem.meas_params.band_list_eutra[0].inter_rat_band_list_present = false;
|
|
capitem.meas_params.band_list_eutra[0].inter_freq_band_list.resize(1);
|
|
capitem.meas_params.band_list_eutra[0].inter_freq_band_list[0].inter_freq_need_for_gaps = false;
|
|
capitem.feature_group_inds_present = true;
|
|
capitem.feature_group_inds.from_number(0xe6041000); // 0x5d0ffc80); // 0xe6041c00;
|
|
{
|
|
uint8_t buffer[128];
|
|
asn1::bit_ref bref(&buffer[0], sizeof(buffer));
|
|
if (capitem.pack(bref) == asn1::SRSASN_ERROR_ENCODE_FAIL) {
|
|
rrc_log->error("Failed to pack UE EUTRA Capability\n");
|
|
}
|
|
hoprep_r8.ue_radio_access_cap_info[0].ue_cap_rat_container.resize((uint32_t)bref.distance_bytes());
|
|
memcpy(&hoprep_r8.ue_radio_access_cap_info[0].ue_cap_rat_container[0], &buffer[0], bref.distance_bytes());
|
|
}
|
|
Debug("UE RA Category: %d\n", capitem.ue_category);
|
|
} else {
|
|
hoprep_r8.ue_radio_access_cap_info.resize(1);
|
|
hoprep_r8.ue_radio_access_cap_info[0].rat_type = asn1::rrc::rat_type_e::eutra;
|
|
|
|
srslte::unique_byte_buffer_t buffer = srslte::allocate_unique_buffer(*pool);
|
|
asn1::bit_ref bref(buffer->msg, buffer->get_tailroom());
|
|
if (rrc_ue->eutra_capabilities.pack(bref) == asn1::SRSASN_ERROR_ENCODE_FAIL) {
|
|
rrc_log->error("Failed to pack UE EUTRA Capability\n");
|
|
return false;
|
|
}
|
|
hoprep_r8.ue_radio_access_cap_info[0].ue_cap_rat_container.resize(bref.distance_bytes());
|
|
memcpy(&hoprep_r8.ue_radio_access_cap_info[0].ue_cap_rat_container[0], buffer->msg, bref.distance_bytes());
|
|
}
|
|
/*** fill AS-Config ***/
|
|
hoprep_r8.as_cfg_present = true;
|
|
// NOTE: set source_meas_cnfg equal to the UE's current var_meas_cfg
|
|
var_meas_cfg_t empty_meascfg{}, target_var_meas = *ue_var_meas;
|
|
// // however, reset the MeasObjToAdd Cells, so that the UE does not measure again the target eNB
|
|
// meas_obj_to_add_mod_s* obj = rrc_details::binary_find(target_var_meas.meas_objs(), measobj_id);
|
|
// obj->meas_obj.meas_obj_eutra().cells_to_add_mod_list.resize(0);
|
|
empty_meascfg.compute_diff_meas_cfg(target_var_meas, &hoprep_r8.as_cfg.source_meas_cfg);
|
|
// - fill source RR Config
|
|
hoprep_r8.as_cfg.source_rr_cfg.sps_cfg_present = false; // TODO: CHECK
|
|
hoprep_r8.as_cfg.source_rr_cfg.mac_main_cfg_present =
|
|
rrc_ue->last_rrc_conn_recfg.crit_exts.c1().rrc_conn_recfg_r8().rr_cfg_ded.mac_main_cfg_present;
|
|
hoprep_r8.as_cfg.source_rr_cfg.mac_main_cfg =
|
|
rrc_ue->last_rrc_conn_recfg.crit_exts.c1().rrc_conn_recfg_r8().rr_cfg_ded.mac_main_cfg;
|
|
hoprep_r8.as_cfg.source_rr_cfg.phys_cfg_ded_present =
|
|
rrc_ue->last_rrc_conn_recfg.crit_exts.c1().rrc_conn_recfg_r8().rr_cfg_ded.phys_cfg_ded_present;
|
|
hoprep_r8.as_cfg.source_rr_cfg.phys_cfg_ded =
|
|
rrc_ue->last_rrc_conn_recfg.crit_exts.c1().rrc_conn_recfg_r8().rr_cfg_ded.phys_cfg_ded;
|
|
// Add SRB2 to the message
|
|
hoprep_r8.as_cfg.source_rr_cfg.srb_to_add_mod_list_present =
|
|
rrc_ue->last_rrc_conn_recfg.crit_exts.c1().rrc_conn_recfg_r8().rr_cfg_ded.srb_to_add_mod_list_present;
|
|
hoprep_r8.as_cfg.source_rr_cfg.srb_to_add_mod_list =
|
|
rrc_ue->last_rrc_conn_recfg.crit_exts.c1().rrc_conn_recfg_r8().rr_cfg_ded.srb_to_add_mod_list;
|
|
// hoprep_r8.as_cfg.source_rr_cfg.srb_to_add_mod_list_present = true;
|
|
// asn1::rrc::srb_to_add_mod_list_l& srb_list = hoprep_r8.as_cfg.source_rr_cfg.srb_to_add_mod_list;
|
|
// srb_list.resize(1);
|
|
// srb_list[0].srb_id = 2;
|
|
// srb_list[0].lc_ch_cfg_present = true;
|
|
// srb_list[0].lc_ch_cfg.set(asn1::rrc::srb_to_add_mod_s::lc_ch_cfg_c_::types::default_value);
|
|
// srb_list[0].rlc_cfg_present = true;
|
|
// srb_list[0].rlc_cfg.set_explicit_value();
|
|
// auto& am = srb_list[0].rlc_cfg.explicit_value().set_am(); // TODO: Which rlc cfg??? I took from a pcap for now
|
|
// am.ul_am_rlc.t_poll_retx = asn1::rrc::t_poll_retx_e::ms60;
|
|
// am.ul_am_rlc.poll_pdu = asn1::rrc::poll_pdu_e::p_infinity;
|
|
// am.ul_am_rlc.poll_byte.value = asn1::rrc::poll_byte_e::kbinfinity;
|
|
// am.ul_am_rlc.max_retx_thres.value = asn1::rrc::ul_am_rlc_s::max_retx_thres_e_::t32;
|
|
// am.dl_am_rlc.t_reordering.value = asn1::rrc::t_reordering_e::ms45;
|
|
// am.dl_am_rlc.t_status_prohibit.value = asn1::rrc::t_status_prohibit_e::ms0;
|
|
// Get DRB1 configuration
|
|
hoprep_r8.as_cfg.source_rr_cfg.drb_to_add_mod_list_present =
|
|
rrc_ue->last_rrc_conn_recfg.crit_exts.c1().rrc_conn_recfg_r8().rr_cfg_ded.drb_to_add_mod_list_present;
|
|
hoprep_r8.as_cfg.source_rr_cfg.drb_to_add_mod_list =
|
|
rrc_ue->last_rrc_conn_recfg.crit_exts.c1().rrc_conn_recfg_r8().rr_cfg_ded.drb_to_add_mod_list;
|
|
// hoprep_r8.as_cfg.source_rr_cfg.drb_to_add_mod_list_present = true;
|
|
// asn1::rrc::drb_to_add_mod_list_l& drb_list = hoprep_r8.as_cfg.source_rr_cfg.drb_to_add_mod_list;
|
|
// drb_list.resize(1);
|
|
// rrc_ue->get_drbid_config(&hoprep_r8.as_cfg.source_rr_cfg.drb_to_add_mod_list[0], 1);
|
|
// hoprep_r8.as_cfg.source_rr_cfg.drb_to_release_list_present = true;
|
|
// hoprep_r8.as_cfg.source_rr_cfg.drb_to_release_list.resize(1);
|
|
// hoprep_r8.as_cfg.source_rr_cfg.drb_to_release_list[0] = 1;
|
|
hoprep_r8.as_cfg.source_security_algorithm_cfg = rrc_ue->last_security_mode_cmd;
|
|
hoprep_r8.as_cfg.source_ue_id.from_number(rrc_ue->rnti);
|
|
asn1::number_to_enum(hoprep_r8.as_cfg.source_mib.dl_bw, rrc_enb->cfg.cell.nof_prb);
|
|
hoprep_r8.as_cfg.source_mib.phich_cfg.phich_dur.value =
|
|
(asn1::rrc::phich_cfg_s::phich_dur_e_::options)rrc_enb->cfg.cell.phich_length;
|
|
hoprep_r8.as_cfg.source_mib.phich_cfg.phich_res.value =
|
|
(asn1::rrc::phich_cfg_s::phich_res_e_::options)rrc_enb->cfg.cell.phich_resources;
|
|
hoprep_r8.as_cfg.source_mib.sys_frame_num.from_number(0); // NOTE: The TS says this can go empty
|
|
hoprep_r8.as_cfg.source_sib_type1 = rrc_enb->cfg.sib1;
|
|
hoprep_r8.as_cfg.source_sib_type2 = rrc_ue->get_ue_cc_cfg(0)->sib2;
|
|
asn1::number_to_enum(hoprep_r8.as_cfg.ant_info_common.ant_ports_count, rrc_enb->cfg.cell.nof_ports);
|
|
hoprep_r8.as_cfg.source_dl_carrier_freq =
|
|
rrc_enb->cfg.cell_list.at(0).dl_earfcn; // TODO: use actual DL EARFCN of source cell
|
|
// - fill as_context
|
|
hoprep_r8.as_context_present = true;
|
|
hoprep_r8.as_context.reest_info_present = true;
|
|
hoprep_r8.as_context.reest_info.source_pci = rrc_enb->cfg.cell_list.at(0).pci; // TODO: use actual PCI of source cell
|
|
hoprep_r8.as_context.reest_info.target_cell_short_mac_i.from_number(
|
|
rrc_details::compute_mac_i(rrc_ue->rnti,
|
|
rrc_enb->cfg.sib1.cell_access_related_info.cell_id.to_number(),
|
|
rrc_enb->cfg.cell_list.at(0).pci, // TODO: use actual PCI of source cell
|
|
rrc_ue->sec_cfg.integ_algo,
|
|
rrc_ue->sec_cfg.k_rrc_int.data()));
|
|
|
|
/*** pack HO Preparation Info into an RRC container buffer ***/
|
|
srslte::unique_byte_buffer_t buffer = srslte::allocate_unique_buffer(*pool);
|
|
asn1::bit_ref bref(buffer->msg, buffer->get_tailroom());
|
|
if (hoprep.pack(bref) == asn1::SRSASN_ERROR_ENCODE_FAIL) {
|
|
Error("Failed to pack HO preparation msg\n");
|
|
return false;
|
|
}
|
|
buffer->N_bytes = bref.distance_bytes();
|
|
|
|
bool success = rrc_enb->s1ap->send_ho_required(rrc_ue->rnti, target_eci, target_plmn, std::move(buffer));
|
|
Info("sent s1ap msg with HO Required\n");
|
|
return success;
|
|
}
|
|
|
|
void rrc::ue::rrc_mobility::handle_ho_preparation_complete(bool is_success, srslte::unique_byte_buffer_t container)
|
|
{
|
|
source_ho_proc.trigger(sourceenb_ho_proc_t::ho_prep_result{is_success, std::move(container)});
|
|
}
|
|
|
|
bool rrc::ue::rrc_mobility::update_ue_var_meas_cfg(const asn1::rrc::meas_cfg_s& source_meas_cfg,
|
|
uint32_t target_enb_cc_idx,
|
|
asn1::rrc::meas_cfg_s* diff_meas_cfg)
|
|
{
|
|
// Generate equivalent VarMeasCfg
|
|
var_meas_cfg_t source_var = var_meas_cfg_t::make(source_meas_cfg);
|
|
|
|
// Compute difference measCfg and update UE VarMeasCfg
|
|
return update_ue_var_meas_cfg(source_var, target_enb_cc_idx, diff_meas_cfg);
|
|
}
|
|
|
|
bool rrc::ue::rrc_mobility::update_ue_var_meas_cfg(const var_meas_cfg_t& source_var_meas_cfg,
|
|
uint32_t target_enb_cc_idx,
|
|
asn1::rrc::meas_cfg_s* diff_meas_cfg)
|
|
{
|
|
// Fetch cell VarMeasCfg
|
|
auto& target_var_ptr = rrc_enb->enb_mobility_cfg->cell_meas_cfg_list[target_enb_cc_idx];
|
|
|
|
// Calculate difference between source and target VarMeasCfg
|
|
bool meas_cfg_present = source_var_meas_cfg.compute_diff_meas_cfg(*target_var_ptr, diff_meas_cfg);
|
|
|
|
// Update user varMeasCfg to target
|
|
rrc_ue->mobility_handler->ue_var_meas = target_var_ptr;
|
|
|
|
return meas_cfg_present;
|
|
}
|
|
|
|
/**
|
|
* TS 36.413, Section 8.4.6 - eNB Status Transfer
|
|
* Description: Send "eNBStatusTransfer" message from source eNB to MME
|
|
* - Pass bearers' DL/UL HFN and PDCP SN to be put inside a transparent container
|
|
*/
|
|
bool rrc::ue::rrc_mobility::start_enb_status_transfer()
|
|
{
|
|
std::vector<s1ap_interface_rrc::bearer_status_info> s1ap_bearers;
|
|
s1ap_bearers.reserve(rrc_ue->bearer_list.get_erabs().size());
|
|
|
|
for (const auto& erab_pair : rrc_ue->bearer_list.get_erabs()) {
|
|
s1ap_interface_rrc::bearer_status_info b = {};
|
|
uint8_t lcid = erab_pair.second.id - 2u;
|
|
b.erab_id = erab_pair.second.id;
|
|
if (not rrc_enb->pdcp->get_bearer_status(rrc_ue->rnti, lcid, &b.pdcp_dl_sn, &b.dl_hfn, &b.pdcp_ul_sn, &b.ul_hfn)) {
|
|
Error("PDCP bearer lcid=%d for rnti=0x%x was not found\n", lcid, rrc_ue->rnti);
|
|
return false;
|
|
}
|
|
s1ap_bearers.push_back(b);
|
|
}
|
|
|
|
Info("PDCP Bearer list sent to S1AP to initiate the eNB Status Transfer\n");
|
|
return rrc_enb->s1ap->send_enb_status_transfer_proc(rrc_ue->rnti, s1ap_bearers);
|
|
}
|
|
|
|
/*************************************************************************************************
|
|
* sourceenb_ho_proc_t class
|
|
************************************************************************************************/
|
|
|
|
rrc::ue::rrc_mobility::sourceenb_ho_proc_t::sourceenb_ho_proc_t(rrc_mobility* ue_mobility_) : parent(ue_mobility_) {}
|
|
|
|
srslte::proc_outcome_t rrc::ue::rrc_mobility::sourceenb_ho_proc_t::init(const meas_id_to_add_mod_s& measid_,
|
|
const meas_obj_to_add_mod_s& measobj_,
|
|
const report_cfg_to_add_mod_s& repcfg_,
|
|
const cells_to_add_mod_s& cell_,
|
|
const meas_result_eutra_s& meas_res_,
|
|
uint32_t target_eci_)
|
|
{
|
|
measid = &measid_;
|
|
measobj = &measobj_;
|
|
repcfg = &repcfg_;
|
|
cell = &cell_;
|
|
meas_res = meas_res_;
|
|
target_eci = target_eci_;
|
|
|
|
// TODO: Check X2 is available first. If fail, go for S1.
|
|
// NOTE: For now only S1-HO is supported. X2 also not available for fwd direct path
|
|
ho_interface = ho_interface_t::S1;
|
|
fwd_direct_path_available = false;
|
|
|
|
state = state_t::ho_preparation;
|
|
procInfo("Started Handover of rnti=0x%x to %s.\n", parent->rrc_ue->rnti, rrc_details::to_string(*cell).c_str());
|
|
if (not parent->start_ho_preparation(target_eci, measobj->meas_obj_id, fwd_direct_path_available)) {
|
|
procError("Failed to send HO Required to MME.\n");
|
|
return srslte::proc_outcome_t::error;
|
|
}
|
|
return srslte::proc_outcome_t::yield;
|
|
}
|
|
|
|
srslte::proc_outcome_t rrc::ue::rrc_mobility::sourceenb_ho_proc_t::react(ho_prep_result e)
|
|
{
|
|
if (not e.is_success) {
|
|
procError("Failure during handover preparation.\n");
|
|
return srslte::proc_outcome_t::error;
|
|
}
|
|
|
|
/* unpack RRC HOCmd struct and perform sanity checks */
|
|
asn1::rrc::ho_cmd_s rrchocmd;
|
|
{
|
|
asn1::cbit_ref bref(e.rrc_container->msg, e.rrc_container->N_bytes);
|
|
if (rrchocmd.unpack(bref) != asn1::SRSASN_SUCCESS) {
|
|
procError("Unpacking of RRC HOCommand was unsuccessful\n");
|
|
parent->rrc_log->error_hex(e.rrc_container->msg, e.rrc_container->N_bytes, "Received container:\n");
|
|
return srslte::proc_outcome_t::error;
|
|
}
|
|
}
|
|
if (rrchocmd.crit_exts.type().value != c1_or_crit_ext_opts::c1 or
|
|
rrchocmd.crit_exts.c1().type().value != ho_cmd_s::crit_exts_c_::c1_c_::types_opts::ho_cmd_r8) {
|
|
procError("Only handling r8 Handover Commands\n");
|
|
}
|
|
|
|
/* unpack DL-DCCH message containing the RRCRonnectionReconf (with MobilityInfo) to be sent to the UE */
|
|
asn1::rrc::dl_dcch_msg_s dl_dcch_msg;
|
|
{
|
|
asn1::cbit_ref bref(&rrchocmd.crit_exts.c1().ho_cmd_r8().ho_cmd_msg[0],
|
|
rrchocmd.crit_exts.c1().ho_cmd_r8().ho_cmd_msg.size());
|
|
if (dl_dcch_msg.unpack(bref) != asn1::SRSASN_SUCCESS) {
|
|
procError("Unpacking of RRC DL-DCCH message with HO Command was unsuccessful.\n");
|
|
return srslte::proc_outcome_t::error;
|
|
}
|
|
}
|
|
if (dl_dcch_msg.msg.type().value != dl_dcch_msg_type_c::types_opts::c1 or
|
|
dl_dcch_msg.msg.c1().type().value != dl_dcch_msg_type_c::c1_c_::types_opts::rrc_conn_recfg) {
|
|
procError("HandoverCommand is expected to contain an RRC Connection Reconf message inside\n");
|
|
return srslte::proc_outcome_t::error;
|
|
}
|
|
asn1::rrc::rrc_conn_recfg_s& reconf = dl_dcch_msg.msg.c1().rrc_conn_recfg();
|
|
if (not reconf.crit_exts.c1().rrc_conn_recfg_r8().mob_ctrl_info_present) {
|
|
procWarning("HandoverCommand is expected to have mobility control subfield\n");
|
|
return srslte::proc_outcome_t::error;
|
|
}
|
|
|
|
// TODO: Do anything with MeasCfg info within the Msg (e.g. update ue_var_meas)?
|
|
|
|
/* Send HO Command to UE */
|
|
parent->rrc_ue->send_dl_dcch(&dl_dcch_msg);
|
|
procInfo("HandoverCommand of rnti=0x%x handled successfully.\n", parent->rrc_ue->rnti);
|
|
state = state_t::ho_execution;
|
|
|
|
/* Start S1AP eNBStatusTransfer Procedure */
|
|
if (not parent->start_enb_status_transfer()) {
|
|
return srslte::proc_outcome_t::error;
|
|
}
|
|
|
|
return srslte::proc_outcome_t::success;
|
|
}
|
|
|
|
} // namespace srsenb
|