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293 lines
10 KiB
C++
293 lines
10 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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#ifndef SRSRAN_GNB_INTERFACES_H
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#define SRSRAN_GNB_INTERFACES_H
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#include "srsran/srsran.h"
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#include "srsenb/hdr/stack/mac/sched_interface.h"
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#include "srsran/common/interfaces_common.h"
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#include "srsran/common/security.h"
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#include "srsran/interfaces/pdcp_interface_types.h"
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#include "srsran/interfaces/rlc_interface_types.h"
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#include "srsran/interfaces/rrc_interface_types.h"
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// EUTRA interfaces that are used unmodified
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#include "srsran/interfaces/enb_mac_interfaces.h"
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#include "srsran/interfaces/enb_rrc_interfaces.h"
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namespace srsenb {
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/*****************************
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* RLC INTERFACES
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****************************/
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class rlc_interface_mac_nr
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{
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public:
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/* MAC calls RLC to get RLC segment of nof_bytes length.
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* Segmentation happens in this function. RLC PDU is stored in payload. */
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virtual int read_pdu(uint16_t rnti, uint32_t lcid, uint8_t* payload, uint32_t nof_bytes) = 0;
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virtual void read_pdu_pcch(uint8_t* payload, uint32_t buffer_size) = 0;
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/* MAC calls RLC to push an RLC PDU. This function is called from an independent MAC thread.
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* PDU gets placed into the buffer and higher layer thread gets notified. */
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virtual void write_pdu(uint16_t rnti, uint32_t lcid, uint8_t* payload, uint32_t nof_bytes) = 0;
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};
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class rlc_interface_pdcp_nr
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{
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public:
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/* PDCP calls RLC to push an RLC SDU. SDU gets placed into the RLC buffer and MAC pulls
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* RLC PDUs according to TB size. */
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virtual void write_sdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t sdu) = 0;
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virtual bool rb_is_um(uint16_t rnti, uint32_t lcid) = 0;
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virtual bool sdu_queue_is_full(uint16_t rnti, uint32_t lcid) = 0;
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};
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class rlc_interface_rrc_nr
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{
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public:
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virtual void clear_buffer(uint16_t rnti) = 0;
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virtual void add_user(uint16_t rnti) = 0;
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virtual void rem_user(uint16_t rnti) = 0;
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virtual void add_bearer(uint16_t rnti, uint32_t lcid, srsran::rlc_config_t cnfg) = 0;
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virtual void add_bearer_mrb(uint16_t rnti, uint32_t lcid) = 0;
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virtual void write_sdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t sdu) = 0;
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};
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/*****************************
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* PDCP INTERFACES
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****************************/
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class pdcp_interface_rlc_nr
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{
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public:
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/* RLC calls PDCP to push a PDCP PDU. */
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virtual void write_pdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t sdu) = 0;
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virtual void notify_delivery(uint16_t rnti, uint32_t lcid, const srsran::pdcp_sn_vector_t& pdcp_sns) = 0;
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virtual void notify_failure(uint16_t rnti, uint32_t lcid, const srsran::pdcp_sn_vector_t& pdcp_sns) = 0;
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};
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class pdcp_interface_rrc_nr
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{
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public:
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virtual void reset(uint16_t rnti) = 0;
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virtual void add_user(uint16_t rnti) = 0;
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virtual void rem_user(uint16_t rnti) = 0;
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virtual void write_sdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t sdu) = 0;
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virtual void add_bearer(uint16_t rnti, uint32_t lcid, srsran::pdcp_config_t cnfg) = 0;
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virtual void config_security(uint16_t rnti, uint32_t lcid, srsran::as_security_config_t sec_cfg) = 0;
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virtual void enable_integrity(uint16_t rnti, uint32_t lcid) = 0;
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virtual void enable_encryption(uint16_t rnti, uint32_t lcid) = 0;
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};
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class pdcp_interface_sdap_nr
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{
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public:
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virtual void write_sdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu) = 0;
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};
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/*****************************
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* SDAP INTERFACES
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****************************/
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class sdap_interface_pdcp_nr
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{
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public:
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virtual void write_pdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu) = 0;
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};
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class sdap_interface_gtpu_nr
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{
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public:
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virtual void write_sdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu) = 0;
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};
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/*****************************
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* GTPU INTERFACES
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****************************/
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class gtpu_interface_rrc_nr
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{
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public:
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};
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class gtpu_interface_sdap_nr
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{
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public:
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virtual void write_pdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu) = 0;
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};
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/*****************************
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* RRC INTERFACES
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****************************/
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class rrc_interface_phy_nr
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{};
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class rrc_interface_mac_nr
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{
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public:
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// Provides MIB packed message
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virtual int read_pdu_bcch_bch(const uint32_t tti, srsran::unique_byte_buffer_t& buffer) = 0;
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virtual int read_pdu_bcch_dlsch(uint32_t sib_index, srsran::unique_byte_buffer_t& buffer) = 0;
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/// User management
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virtual int add_user(uint16_t rnti) = 0;
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virtual int update_user(uint16_t new_rnti, uint16_t old_rnti) = 0;
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virtual void set_activity_user(uint16_t rnti) = 0;
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};
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// NR interface is almost identical to EUTRA version
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class rrc_interface_rlc_nr : public rrc_interface_rlc
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{
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public:
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virtual void read_pdu_pcch(uint8_t* payload, uint32_t payload_size) = 0;
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virtual const char* get_rb_name(uint32_t lcid) = 0;
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};
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// NR interface identical to EUTRA version
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class rrc_interface_pdcp_nr : public rrc_interface_pdcp
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{};
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class phy_interface_rrc_nr
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{
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public:
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/**
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* @brief Describes physical layer configuration common among all the UEs for a given cell
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*/
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struct common_cfg_t {
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srsran_carrier_nr_t carrier;
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srsran_pdcch_cfg_nr_t pdcch;
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srsran_prach_cfg_t prach;
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srsran_duplex_mode_t duplex_mode;
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};
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virtual int set_common_cfg(const common_cfg_t& common_cfg) = 0;
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};
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class phy_interface_mac_nr
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{
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public:
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// TBD
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};
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// Combined interface for stack (MAC and RRC) to access PHY
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class phy_interface_stack_nr : public phy_interface_rrc_nr, public phy_interface_mac_nr
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{
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public:
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// TBD
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};
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class stack_interface_mac
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{
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public:
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///< MAC calls stack to inform about new PDUs having arrived to be further processes in stack thread
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virtual void process_pdus() = 0;
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};
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class mac_interface_phy_nr
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{
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public:
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const static int MAX_SSB = 4;
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const static int MAX_GRANTS = 64;
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const static int MAX_PUCCH_MSG = 64;
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const static int MAX_PUCCH_CANDIDATES = 2;
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const static int MAX_NZP_CSI_RS = 4;
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struct pdcch_dl_t {
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srsran_dci_cfg_nr_t dci_cfg = {};
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srsran_dci_dl_nr_t dci = {};
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};
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struct pdcch_ul_t {
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srsran_dci_cfg_nr_t dci_cfg = {};
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srsran_dci_ul_nr_t dci = {};
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};
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struct pdsch_t {
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srsran_sch_cfg_nr_t sch = {}; ///< PDSCH configuration
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std::array<srsran::byte_buffer_t*, SRSRAN_MAX_TB> data = {}; ///< Data pointer
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};
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struct ssb_t {
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srsran_pbch_msg_nr_t pbch_msg = {};
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};
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struct dl_sched_t {
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srsran::bounded_vector<ssb_t, MAX_SSB> ssb;
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srsran::bounded_vector<pdcch_dl_t, MAX_GRANTS> pdcch_dl;
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srsran::bounded_vector<pdcch_ul_t, MAX_GRANTS> pdcch_ul;
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srsran::bounded_vector<pdsch_t, MAX_GRANTS> pdsch;
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srsran::bounded_vector<srsran_csi_rs_nzp_resource_t, MAX_NZP_CSI_RS> nzp_csi_rs;
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};
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struct pusch_t {
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uint32_t pid = 0; ///< HARQ process ID
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srsran_sch_cfg_nr_t sch = {}; ///< PUSCH configuration
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};
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/**
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* @brief Describes a possible PUCCH candidate transmission
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* @note The physical layer shall try decoding all the possible PUCCH candidates and report back to the stack the
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* strongest of the candidates. This is thought to be used in the case of SR opportunities in which the UE could
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* transmit HARQ-ACK in two possible resources.
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*/
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struct pucch_candidate_t {
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srsran_uci_cfg_nr_t uci_cfg; ///< UCI configuration for the opportunity
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srsran_pucch_nr_resource_t resource; ///< PUCCH resource to use
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};
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struct pucch_t {
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srsran_pucch_nr_common_cfg_t pucch_cfg; ///< UE dedicated PUCCH configuration
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srsran::bounded_vector<pucch_candidate_t, MAX_PUCCH_CANDIDATES> candidates; ///< PUCCH candidates to decode
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};
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struct ul_sched_t {
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srsran::bounded_vector<pusch_t, MAX_GRANTS> pusch;
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srsran::bounded_vector<pucch_t, MAX_GRANTS> pucch;
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};
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struct pucch_info_t {
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srsran_uci_data_nr_t uci_data; ///< RNTI is available under cfg->pucch->rnti
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srsran_csi_trs_measurements_t csi; ///< DMRS based signal Channel State Information (CSI)
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};
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struct pusch_info_t {
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// Context
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uint16_t rnti; ///< UE temporal identifier
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uint32_t pid = 0; ///< HARQ process ID
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// SCH and UCI payload information
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srsran_pusch_res_nr_t pusch_data;
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srsran_uci_cfg_nr_t uci_cfg; ///< Provides UCI configuration, so stack does not need to keep the pending state
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// Actual SCH PDU
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srsran::unique_byte_buffer_t pdu = nullptr;
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// PUSCH signal measurements
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// ...
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};
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struct rach_info_t {
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uint32_t slot_index;
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uint32_t preamble;
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uint32_t time_adv;
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};
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virtual int slot_indication(const srsran_slot_cfg_t& slot_cfg) = 0;
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virtual int get_dl_sched(const srsran_slot_cfg_t& slot_cfg, dl_sched_t& dl_sched) = 0;
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virtual int get_ul_sched(const srsran_slot_cfg_t& slot_cfg, ul_sched_t& ul_sched) = 0;
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virtual int pucch_info(const srsran_slot_cfg_t& slot_cfg, const pucch_info_t& pucch_info) = 0;
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virtual int pusch_info(const srsran_slot_cfg_t& slot_cfg, pusch_info_t& pusch_info) = 0;
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virtual void rach_detected(const rach_info_t& rach_info) = 0;
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};
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class stack_interface_phy_nr : public mac_interface_phy_nr, public srsran::stack_interface_phy_nr
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{};
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} // namespace srsenb
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#endif // SRSRAN_GNB_INTERFACES_H
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