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258 lines
10 KiB
C++
258 lines
10 KiB
C++
/**
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* Copyright 2013-2021 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/rrc_interface_types.h"
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#include "srsran/interfaces/sched_interface.h"
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#ifndef SRSRAN_ENB_MAC_INTERFACES_H
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#define SRSRAN_ENB_MAC_INTERFACES_H
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namespace srsenb {
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struct mac_args_t {
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uint32_t nof_prb; ///< Needed to dimension MAC softbuffers for all cells
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sched_interface::sched_args_t sched;
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int nr_tb_size = -1;
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uint32_t max_nof_ues;
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uint32_t max_nof_kos;
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};
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/* Interface PHY -> MAC */
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class mac_interface_phy_lte
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{
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public:
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const static int MAX_GRANTS = 64;
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/**
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* DL grant structure per UE
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*/
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struct dl_sched_grant_t {
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srsran_dci_dl_t dci = {};
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uint8_t* data[SRSRAN_MAX_TB] = {};
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srsran_softbuffer_tx_t* softbuffer_tx[SRSRAN_MAX_TB] = {};
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};
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/**
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* DL Scheduling result per cell/carrier
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*/
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typedef struct {
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dl_sched_grant_t pdsch[MAX_GRANTS]; //< DL Grants
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uint32_t nof_grants; //< Number of DL grants
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uint32_t cfi; //< Current CFI of the cell, it can vary across cells
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} dl_sched_t;
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/**
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* List of DL scheduling results, one entry per cell/carrier
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*/
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using dl_sched_list_t = srsran::bounded_vector<dl_sched_t, SRSRAN_MAX_CARRIERS>;
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typedef struct {
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uint16_t rnti;
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bool ack;
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} ul_sched_ack_t;
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/**
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* UL grant information per UE
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*/
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typedef struct {
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srsran_dci_ul_t dci;
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uint32_t pid;
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uint32_t current_tx_nb;
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uint8_t* data;
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bool needs_pdcch;
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srsran_softbuffer_rx_t* softbuffer_rx;
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} ul_sched_grant_t;
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/**
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* UL Scheduling result per cell/carrier
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*/
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typedef struct {
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ul_sched_grant_t pusch[MAX_GRANTS];
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ul_sched_ack_t phich[MAX_GRANTS];
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uint32_t nof_grants;
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uint32_t nof_phich;
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} ul_sched_t;
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/**
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* List of UL scheduling results, one entry per cell/carrier
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*/
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using ul_sched_list_t = srsran::bounded_vector<ul_sched_t, SRSRAN_MAX_CARRIERS>;
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virtual int sr_detected(uint32_t tti, uint16_t rnti) = 0;
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virtual void rach_detected(uint32_t tti, uint32_t primary_cc_idx, uint32_t preamble_idx, uint32_t time_adv) = 0;
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/**
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* PHY callback for giving MAC the Rank Indicator information of a given RNTI for an eNb cell/carrier.
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*
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* @param tti the given TTI
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* @param rnti the UE identifier in the eNb
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* @param cc_idx The eNb Cell/Carrier where the measurement corresponds
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* @param ri_value the actual Rank Indicator value, 0 for 1 layer, 1 for two layers and so on.
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* @return SRSRAN_SUCCESS if no error occurs, SRSRAN_ERROR* if an error occurs
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*/
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virtual int ri_info(uint32_t tti, uint16_t rnti, uint32_t cc_idx, uint32_t ri_value) = 0;
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/**
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* PHY callback for giving MAC the Pre-coding Matrix Indicator information of a given RNTI for an eNb cell/carrier.
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*
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* @param tti the given TTI
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* @param rnti the UE identifier in the eNb
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* @param cc_idx The eNb Cell/Carrier where the measurement corresponds
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* @param pmi_value the actual PMI value
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* @return SRSRAN_SUCCESS if no error occurs, SRSRAN_ERROR* if an error occurs
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*/
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virtual int pmi_info(uint32_t tti, uint16_t rnti, uint32_t cc_idx, uint32_t pmi_value) = 0;
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/**
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* PHY callback for for giving MAC the Channel Quality information of a given RNTI, TTI and eNb cell/carrier
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* @param tti the given TTI
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* @param rnti the UE identifier in the eNb
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* @param cc_idx The eNb Cell/Carrier where the measurement corresponds
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* @param cqi_value the corresponding Channel Quality Information
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* @return SRSRAN_SUCCESS if no error occurs, SRSRAN_ERROR* if an error occurs
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*/
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virtual int cqi_info(uint32_t tti, uint16_t rnti, uint32_t cc_idx, uint32_t cqi_value) = 0;
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typedef enum { PUSCH = 0, PUCCH, SRS } ul_channel_t;
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/**
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* PHY callback for giving MAC the SNR in dB of an UL transmission for a given RNTI at a given carrier
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*
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* @param tti The measurement was made
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* @param rnti The UE identifier in the eNb
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* @param cc_idx The eNb Cell/Carrier where the UL transmission was received
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* @param snr_db The actual SNR of the received signal
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* @param ch Indicates uplink channel (PUSCH, PUCCH or SRS)
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* @return SRSRAN_SUCCESS if no error occurs, SRSRAN_ERROR* if an error occurs
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*/
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virtual int snr_info(uint32_t tti, uint16_t rnti, uint32_t cc_idx, float snr_db, ul_channel_t ch) = 0;
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/**
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* PHY callback for giving MAC the Time Aligment information in microseconds of a given RNTI during a TTI processing
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*
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* @param tti The measurement was made
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* @param rnti The UE identifier in the eNb
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* @param ta_us The actual time alignment in microseconds
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* @return SRSRAN_SUCCESS if no error occurs, SRSRAN_ERROR* if an error occurs
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*/
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virtual int ta_info(uint32_t tti, uint16_t rnti, float ta_us) = 0;
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/**
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* PHY callback for giving MAC the HARQ DL ACK/NACK feedback information for a given RNTI, TTI, eNb cell/carrier and
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* Transport block.
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*
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* @param tti the given TTI
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* @param rnti the UE identifier in the eNb
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* @param cc_idx the eNb Cell/Carrier identifier
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* @param tb_idx the transport block index
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* @param ack true for ACK, false for NACK, do not call for DTX
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* @return SRSRAN_SUCCESS if no error occurs, SRSRAN_ERROR* if an error occurs
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*/
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virtual int ack_info(uint32_t tti, uint16_t rnti, uint32_t cc_idx, uint32_t tb_idx, bool ack) = 0;
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/**
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* Informs MAC about a received PUSCH transmission for given RNTI, TTI and eNb Cell/carrier.
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*
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* This function does not deallocate the uplink buffer. The function push_pdu() must be called after this
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* to inform the MAC that the uplink buffer can be discarded or pushed to the stack
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*
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* @param tti the given TTI
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* @param rnti the UE identifier in the eNb
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* @param cc_idx the eNb Cell/Carrier identifier
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* @param nof_bytes the number of grants carrierd by the PUSCH message
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* @param crc_res the CRC check, set to true if the message was decoded succesfully
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* @return SRSRAN_SUCCESS if no error occurs, SRSRAN_ERROR* if an error occurs
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*/
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virtual int crc_info(uint32_t tti, uint16_t rnti, uint32_t cc_idx, uint32_t nof_bytes, bool crc_res) = 0;
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/**
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* Pushes an uplink PDU through the stack if crc_res==true or discards it if crc_res==false
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*
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* @param tti the given TTI
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* @param rnti the UE identifier in the eNb
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* @param enb_cc_idx the eNb Cell/Carrier identifier
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* @param nof_bytes the number of grants carrierd by the PUSCH message
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* @param crc_res the CRC check, set to true if the message was decoded succesfully
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* @return SRSRAN_SUCCESS if no error occurs, SRSRAN_ERROR* if an error occurs
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*/
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virtual int push_pdu(uint32_t tti_rx, uint16_t rnti, uint32_t enb_cc_idx, uint32_t nof_bytes, bool crc_res) = 0;
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virtual int get_dl_sched(uint32_t tti, dl_sched_list_t& dl_sched_res) = 0;
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virtual int get_mch_sched(uint32_t tti, bool is_mcch, dl_sched_list_t& dl_sched_res) = 0;
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virtual int get_ul_sched(uint32_t tti, ul_sched_list_t& ul_sched_res) = 0;
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virtual void set_sched_dl_tti_mask(uint8_t* tti_mask, uint32_t nof_sfs) = 0;
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};
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class mac_interface_rlc
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{
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public:
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virtual int rlc_buffer_state(uint16_t rnti, uint32_t lc_id, uint32_t tx_queue, uint32_t retx_queue) = 0;
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};
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class mac_interface_rrc
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{
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public:
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/* Provides cell configuration including SIB periodicity, etc. */
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virtual int cell_cfg(const std::vector<sched_interface::cell_cfg_t>& cell_cfg) = 0;
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virtual void reset() = 0;
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/* Manages UE configuration context */
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virtual int ue_cfg(uint16_t rnti, sched_interface::ue_cfg_t* cfg) = 0;
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virtual int ue_rem(uint16_t rnti) = 0;
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/**
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* Called after Msg3 reception to set the UE C-RNTI, resolve contention, and alter the UE's configuration in the
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* scheduler and phy.
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*
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* @param temp_crnti temporary C-RNTI of the UE
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* @param crnti chosen C-RNTI for the UE
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* @param cfg new UE scheduler configuration
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*/
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virtual int ue_set_crnti(uint16_t temp_crnti, uint16_t crnti, sched_interface::ue_cfg_t* cfg) = 0;
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/* Manages UE bearers and associated configuration */
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virtual int bearer_ue_cfg(uint16_t rnti, uint32_t lc_id, sched_interface::ue_bearer_cfg_t* cfg) = 0;
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virtual int bearer_ue_rem(uint16_t rnti, uint32_t lc_id) = 0;
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virtual void phy_config_enabled(uint16_t rnti, bool enabled) = 0;
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virtual void write_mcch(const srsran::sib2_mbms_t* sib2_,
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const srsran::sib13_t* sib13_,
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const srsran::mcch_msg_t* mcch_,
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const uint8_t* mcch_payload,
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const uint8_t mcch_payload_length) = 0;
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/**
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* Allocate a C-RNTI for a new user, without adding it to the phy layer and scheduler yet
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* @return value of the allocated C-RNTI
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*/
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virtual uint16_t reserve_new_crnti(const sched_interface::ue_cfg_t& ue_cfg) = 0;
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};
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// Combined interface for PHY to access stack (MAC and RRC)
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class stack_interface_phy_lte : public mac_interface_phy_lte
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{
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public:
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virtual void tti_clock() = 0;
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};
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} // namespace srsenb
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#endif // SRSRAN_ENB_MAC_INTERFACES_H
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