mirror of https://github.com/PentHertz/srsLTE.git
enb,rrc_nr: register DRB1 at RLC/PDCP when enabling NSA mode
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parent
296949b5f9
commit
201f29b4e5
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@ -118,11 +118,17 @@ public:
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int pack_secondary_cell_group_config(asn1::dyn_octstring& packed_secondary_cell_config);
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int pack_nr_radio_bearer_config(asn1::dyn_octstring& packed_nr_bearer_config);
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int add_drb();
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// state
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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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uint32_t drb1_lcid = 4;
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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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const uint32_t drb1_lcid = 4;
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};
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private:
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@ -492,7 +492,7 @@ void rrc_nr::ue::send_dl_ccch(dl_ccch_msg_s* dl_ccch_msg)
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// Helper for the RRC Reconfiguration sender to pack hard-coded config
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int rrc_nr::ue::pack_secondary_cell_group_config(asn1::dyn_octstring& packed_secondary_cell_config)
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{
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cell_group_cfg_s cell_group_cfg_pack;
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auto& cell_group_cfg_pack = cell_group_cfg;
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// RLC for DRB1 (with fixed LCID)
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cell_group_cfg_pack.rlc_bearer_to_add_mod_list_present = true;
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@ -1078,38 +1078,19 @@ int rrc_nr::ue::pack_rrc_reconfiguraiton(asn1::dyn_octstring& packed_rrc_reconfi
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// Packs a hard-coded NR radio bearer config with fixed params for RLC/PDCP (for now)
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int rrc_nr::ue::pack_nr_radio_bearer_config(asn1::dyn_octstring& packed_nr_bearer_config)
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{
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radio_bearer_cfg_s radio_bearer_cfg;
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radio_bearer_cfg.drb_to_add_mod_list_present = true;
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radio_bearer_cfg.drb_to_add_mod_list.resize(1);
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// configure fixed DRB1
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auto& drb_item = radio_bearer_cfg.drb_to_add_mod_list[0];
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drb_item.drb_id = 1;
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drb_item.cn_assoc_present = true;
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drb_item.cn_assoc.set_eps_bearer_id() = 5;
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drb_item.pdcp_cfg_present = true;
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drb_item.pdcp_cfg.ciphering_disabled_present = true;
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drb_item.pdcp_cfg.drb_present = true;
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drb_item.pdcp_cfg.drb.pdcp_sn_size_dl_present = true;
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drb_item.pdcp_cfg.drb.pdcp_sn_size_dl = asn1::rrc_nr::pdcp_cfg_s::drb_s_::pdcp_sn_size_dl_opts::len18bits;
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drb_item.pdcp_cfg.drb.pdcp_sn_size_ul_present = true;
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drb_item.pdcp_cfg.drb.pdcp_sn_size_ul = asn1::rrc_nr::pdcp_cfg_s::drb_s_::pdcp_sn_size_ul_opts::len18bits;
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drb_item.pdcp_cfg.drb.discard_timer_present = true;
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drb_item.pdcp_cfg.drb.discard_timer = asn1::rrc_nr::pdcp_cfg_s::drb_s_::discard_timer_opts::ms100;
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drb_item.pdcp_cfg.drb.hdr_compress.set_not_used();
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drb_item.pdcp_cfg.t_reordering_present = true;
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drb_item.pdcp_cfg.t_reordering = asn1::rrc_nr::pdcp_cfg_s::t_reordering_opts::ms0;
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radio_bearer_cfg.security_cfg_present = true;
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radio_bearer_cfg.security_cfg.key_to_use_present = true;
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radio_bearer_cfg.security_cfg.key_to_use = asn1::rrc_nr::security_cfg_s::key_to_use_opts::secondary;
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radio_bearer_cfg.security_cfg.security_algorithm_cfg_present = true;
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radio_bearer_cfg.security_cfg.security_algorithm_cfg.ciphering_algorithm = ciphering_algorithm_opts::nea2;
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// set security config
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auto& radio_bearer_cfg_pack = radio_bearer_cfg;
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radio_bearer_cfg_pack.security_cfg_present = true;
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auto& sec_cfg = radio_bearer_cfg_pack.security_cfg;
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sec_cfg.key_to_use_present = true;
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sec_cfg.key_to_use = asn1::rrc_nr::security_cfg_s::key_to_use_opts::secondary;
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sec_cfg.security_algorithm_cfg_present = true;
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sec_cfg.security_algorithm_cfg.ciphering_algorithm = ciphering_algorithm_opts::nea2;
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// pack it
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packed_nr_bearer_config.resize(128);
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asn1::bit_ref bref_pack(packed_nr_bearer_config.data(), packed_nr_bearer_config.size());
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if (radio_bearer_cfg.pack(bref_pack) != asn1::SRSASN_SUCCESS) {
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if (radio_bearer_cfg_pack.pack(bref_pack) != asn1::SRSASN_SUCCESS) {
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parent->logger.error("Failed to pack NR radio bearer config");
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return SRSRAN_ERROR;
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}
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@ -1122,6 +1103,13 @@ int rrc_nr::ue::pack_nr_radio_bearer_config(asn1::dyn_octstring& packed_nr_beare
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int rrc_nr::ue::handle_sgnb_addition_request(uint16_t eutra_rnti)
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{
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// Add DRB1 to RLC and PDCP
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if (add_drb() != SRSRAN_SUCCESS) {
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parent->logger.error("Failed to configure DRB");
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parent->rrc_eutra->sgnb_addition_reject(eutra_rnti);
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return SRSRAN_ERROR;
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}
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// provide hard-coded NR configs
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asn1::dyn_octstring nr_secondary_cell_group_cfg;
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if (pack_rrc_reconfiguraiton(nr_secondary_cell_group_cfg) == SRSRAN_ERROR) {
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@ -1143,4 +1131,84 @@ int rrc_nr::ue::handle_sgnb_addition_request(uint16_t eutra_rnti)
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return SRSRAN_SUCCESS;
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}
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/**
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* @brief Set DRB configuration
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*
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* The function sets and configures all relavant fields for the DRB configuration (MAC, RLC, PDCP) in the
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* cellGroupConfig and also adds the bearer to the local RLC and PDCP entities.
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*
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* @return int SRSRAN_SUCCESS on success
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*/
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int rrc_nr::ue::add_drb()
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{
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// RLC for DRB1 (with fixed LCID) inside cell_group_cfg
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auto& cell_group_cfg_pack = cell_group_cfg;
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cell_group_cfg_pack.rlc_bearer_to_add_mod_list_present = true;
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cell_group_cfg_pack.rlc_bearer_to_add_mod_list.resize(1);
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auto& rlc = cell_group_cfg_pack.rlc_bearer_to_add_mod_list[0];
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rlc.lc_ch_id = drb1_lcid;
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rlc.served_radio_bearer_present = true;
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rlc.served_radio_bearer.set_drb_id();
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rlc.served_radio_bearer.drb_id() = 1;
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rlc.rlc_cfg_present = true;
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rlc.rlc_cfg.set_um_bi_dir();
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rlc.rlc_cfg.um_bi_dir().ul_um_rlc.sn_field_len_present = true;
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rlc.rlc_cfg.um_bi_dir().ul_um_rlc.sn_field_len = sn_field_len_um_opts::size12;
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rlc.rlc_cfg.um_bi_dir().dl_um_rlc.sn_field_len_present = true;
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rlc.rlc_cfg.um_bi_dir().dl_um_rlc.sn_field_len = sn_field_len_um_opts::size12;
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rlc.rlc_cfg.um_bi_dir().dl_um_rlc.t_reassembly = t_reassembly_opts::ms50;
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// add RLC bearer
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srsran::rlc_config_t rlc_cfg;
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if (srsran::make_rlc_config_t(cell_group_cfg.rlc_bearer_to_add_mod_list[0].rlc_cfg, &rlc_cfg) != SRSRAN_SUCCESS) {
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parent->logger.error("Failed to build RLC config");
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return SRSRAN_ERROR;
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}
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parent->rlc->add_bearer(rnti, drb1_lcid, rlc_cfg);
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// MAC logical channel config
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rlc.mac_lc_ch_cfg_present = true;
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rlc.mac_lc_ch_cfg.ul_specific_params_present = true;
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rlc.mac_lc_ch_cfg.ul_specific_params.prio = 11;
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rlc.mac_lc_ch_cfg.ul_specific_params.prioritised_bit_rate =
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asn1::rrc_nr::lc_ch_cfg_s::ul_specific_params_s_::prioritised_bit_rate_opts::kbps0;
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rlc.mac_lc_ch_cfg.ul_specific_params.bucket_size_dur =
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asn1::rrc_nr::lc_ch_cfg_s::ul_specific_params_s_::bucket_size_dur_opts::ms100;
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rlc.mac_lc_ch_cfg.ul_specific_params.lc_ch_group_present = true;
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rlc.mac_lc_ch_cfg.ul_specific_params.lc_ch_group = 6;
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rlc.mac_lc_ch_cfg.ul_specific_params.sched_request_id_present = true;
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rlc.mac_lc_ch_cfg.ul_specific_params.sched_request_id = 0;
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// TODO: add LC config to MAC
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// PDCP config goes into radio_bearer_cfg
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auto& radio_bearer_cfg_pack = radio_bearer_cfg;
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radio_bearer_cfg_pack.drb_to_add_mod_list_present = true;
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radio_bearer_cfg_pack.drb_to_add_mod_list.resize(1);
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// configure fixed DRB1
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auto& drb_item = radio_bearer_cfg_pack.drb_to_add_mod_list[0];
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drb_item.drb_id = 1;
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drb_item.cn_assoc_present = true;
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drb_item.cn_assoc.set_eps_bearer_id() = 5;
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drb_item.pdcp_cfg_present = true;
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drb_item.pdcp_cfg.ciphering_disabled_present = true;
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drb_item.pdcp_cfg.drb_present = true;
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drb_item.pdcp_cfg.drb.pdcp_sn_size_dl_present = true;
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drb_item.pdcp_cfg.drb.pdcp_sn_size_dl = asn1::rrc_nr::pdcp_cfg_s::drb_s_::pdcp_sn_size_dl_opts::len18bits;
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drb_item.pdcp_cfg.drb.pdcp_sn_size_ul_present = true;
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drb_item.pdcp_cfg.drb.pdcp_sn_size_ul = asn1::rrc_nr::pdcp_cfg_s::drb_s_::pdcp_sn_size_ul_opts::len18bits;
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drb_item.pdcp_cfg.drb.discard_timer_present = true;
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drb_item.pdcp_cfg.drb.discard_timer = asn1::rrc_nr::pdcp_cfg_s::drb_s_::discard_timer_opts::ms100;
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drb_item.pdcp_cfg.drb.hdr_compress.set_not_used();
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drb_item.pdcp_cfg.t_reordering_present = true;
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drb_item.pdcp_cfg.t_reordering = asn1::rrc_nr::pdcp_cfg_s::t_reordering_opts::ms0;
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// Add DRB1 to PDCP
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srsran::pdcp_config_t pdcp_cnfg = srsran::make_drb_pdcp_config_t(drb_item.drb_id, false, drb_item.pdcp_cfg);
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parent->pdcp->add_bearer(rnti, rlc.lc_ch_id, pdcp_cnfg);
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return SRSRAN_SUCCESS;
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}
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} // namespace srsenb
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