mirror of https://github.com/PentHertz/srsLTE.git
133 lines
4.5 KiB
C++
133 lines
4.5 KiB
C++
/**
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* Copyright 2013-2022 Software Radio Systems Limited
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*
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* This file is part of srsRAN.
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*
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* srsRAN 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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* srsRAN 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 "srsran/interfaces/enb_gtpu_interfaces.h"
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#include "srsran/interfaces/enb_pdcp_interfaces.h"
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#include "srsran/interfaces/enb_rrc_interface_types.h"
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#ifndef SRSRAN_ENB_X2_INTERFACES_H
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#define SRSRAN_ENB_X2_INTERFACES_H
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namespace srsenb {
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/**
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* @brief Set of X2AP inspired interfaces to support 5G NSA
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*
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*/
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/// X2AP inspired interface to allow EUTRA RRC to call NR RRC
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class rrc_nr_interface_rrc
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{
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public:
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struct sgnb_addition_req_params_t {
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uint32_t eps_bearer_id;
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uint32_t five_qi;
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// add configuration check
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// E-RAB Parameters, Tunnel address (IP address, TEID)
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// QCI, security, etc
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};
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/// Request addition of NR carrier for UE
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virtual void sgnb_addition_request(uint16_t eutra_rnti, const sgnb_addition_req_params_t& params) = 0;
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/// Provide information whether the requested configuration was applied successfully by the UE
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virtual void sgnb_reconfiguration_complete(uint16_t eutra_rnti, const asn1::dyn_octstring& reconfig_response) = 0;
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/// Trigger release for specific UE
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virtual void sgnb_release_request(uint16_t nr_rnti) = 0;
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};
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/// X2AP inspired interface for response from NR RRC to EUTRA RRC
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class rrc_eutra_interface_rrc_nr
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{
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public:
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/**
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* @brief List of parameters included in the SgNB addition Ack message
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* @param nr_secondary_cell_group_cfg_r15 Encoded part of the RRC Reconfiguration
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* @param nr_radio_bearer_cfg1_r15 Encoded part of the RRC Reconfiguration
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* @param eps_bearer_id ID of the transfered bearer
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*/
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struct sgnb_addition_ack_params_t {
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uint16_t nr_rnti = SRSRAN_INVALID_RNTI; // RNTI that was assigned to the UE
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asn1::dyn_octstring nr_secondary_cell_group_cfg_r15;
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asn1::dyn_octstring nr_radio_bearer_cfg1_r15;
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uint32_t eps_bearer_id = 0; // (list of) successfully transfered EPS bearers
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};
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/**
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* @brief Signal successful addition of UE
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*
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* @param eutra_rnti The RNTI that the EUTRA RRC used to request the SgNB addition
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* @param params Parameter list
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*/
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virtual void sgnb_addition_ack(uint16_t eutra_rnti, sgnb_addition_ack_params_t params) = 0;
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/**
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* @brief Signal unsuccessful SgNB addition
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*
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* @param eutra_rnti The RNTI that the EUTRA RRC used to request the SgNB addition
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*/
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virtual void sgnb_addition_reject(uint16_t eutra_rnti) = 0;
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/**
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* @brief Signal completion of SgNB addition after UE (with new NR identity) has attached
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*
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* @param eutra_rnti The RNTI that the EUTRA RRC used to request the SgNB addition
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* @param nr_rnti The RNTI that has been assigned to the UE on the SgNB
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*/
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virtual void sgnb_addition_complete(uint16_t eutra_rnti, uint16_t nr_rnti) = 0;
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/**
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* @brief Signal timeout for inactivity or MSG5 timers
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*
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* @param eutra_rnti The RNTI that the EUTRA RRC used to request the SgNB addition
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*/
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virtual void sgnb_inactivity_timeout(uint16_t eutra_rnti) = 0;
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/**
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* @brief Signal release of all UE resources on the NR cell
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*
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* @param eutra_rnti The RNTI that the EUTRA RRC used to request the SgNB addition
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*/
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virtual void sgnb_release_ack(uint16_t eutra_rnti) = 0;
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/**
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* @brief Signal user activity (i.e. DL/UL traffic) for given RNTI
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*
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* @param eutra_rnti The RNTI that the EUTRA RRC uses
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*/
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virtual void set_activity_user(uint16_t eutra_rnti) = 0;
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};
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// combined interface used by X2 adapter
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class x2_interface : public rrc_nr_interface_rrc,
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public rrc_eutra_interface_rrc_nr,
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public pdcp_interface_gtpu, // allow GTPU to access PDCP in DL direction
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public gtpu_interface_pdcp // allow PDCP to access GTPU in UL direction
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{
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public:
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virtual ~x2_interface() = default;
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};
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} // namespace srsenb
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#endif // SRSRAN_ENB_X2_INTERFACES_H
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