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147 lines
4.1 KiB
C++
147 lines
4.1 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2020 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 SRSLTE_MAC_SCH_PDU_NR_H
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#define SRSLTE_MAC_SCH_PDU_NR_H
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#include "srslte/common/byte_buffer.h"
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#include "srslte/common/common.h"
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#include "srslte/config.h"
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#include "srslte/srslog/srslog.h"
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#include <memory>
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#include <stdint.h>
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#include <vector>
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namespace srslte {
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class mac_sch_pdu_nr;
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class mac_sch_subpdu_nr
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{
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public:
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// 3GPP 38.321 v15.3.0 Combined Tables 6.2.1-1, 6.2.1-2
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typedef enum {
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// Values for DL-SCH
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CCCH = 0b000000,
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DRX_CMD = 0b111100,
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TA_CMD = 0b111101,
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CON_RES_ID = 0b111110,
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// Values for UL-SCH
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CRNTI = 0b111010,
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SHORT_TRUNC_BSR = 0b111011,
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LONG_TRUNC_BSR = 0b111100,
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CCCH_SIZE_48 = 0b110100,
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CCCH_SIZE_64 = 0b000000,
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SE_PHR = 0b111001, // Single Entry PHR
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SHORT_BSR = 0b111101,
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LONG_BSR = 0b111110,
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// Common
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PADDING = 0b111111,
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} nr_lcid_sch_t;
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mac_sch_subpdu_nr(mac_sch_pdu_nr* parent_);
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nr_lcid_sch_t get_type();
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bool is_sdu();
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bool is_valid_lcid();
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bool is_var_len_ce();
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bool is_ul_ccch();
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int32_t read_subheader(const uint8_t* ptr);
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uint32_t get_total_length();
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uint32_t get_sdu_length();
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uint32_t get_lcid();
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uint8_t* get_sdu();
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uint16_t get_c_rnti();
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// both return the reported values as per TS 38.321, mapping to dB according to TS 38.133 Sec 10.1.17 not done here
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uint8_t get_phr();
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uint8_t get_pcmax();
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// BSR
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struct lcg_bsr_t {
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uint8_t lcg_id;
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uint8_t buffer_size;
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};
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lcg_bsr_t get_sbsr();
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static const uint8_t max_num_lcg_lbsr = 8;
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std::array<lcg_bsr_t, max_num_lcg_lbsr> get_lbsr();
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// setters
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void set_sdu(const uint32_t lcid_, const uint8_t* payload_, const uint32_t len_);
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void set_padding(const uint32_t len_);
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void set_c_rnti(const uint16_t crnti_);
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void set_se_phr(const uint8_t phr_, const uint8_t pcmax_);
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void set_sbsr(const lcg_bsr_t bsr_);
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uint32_t write_subpdu(const uint8_t* start_);
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private:
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uint32_t sizeof_ce(uint32_t lcid, bool is_ul);
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// protected:
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uint32_t lcid = 0;
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int header_length = 0;
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int sdu_length = 0;
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bool F_bit = false;
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uint8_t* sdu = nullptr;
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static const uint8_t mac_ce_payload_len = 8 + 1; // Long BSR has max. 9 octets (see sizeof_ce() too)
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std::array<uint8_t, mac_ce_payload_len> ce_write_buffer; // Buffer for CE payload
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mac_sch_pdu_nr* parent = nullptr;
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};
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class mac_sch_pdu_nr
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{
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public:
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mac_sch_pdu_nr(bool ulsch_ = false) : ulsch(ulsch_), logger(srslog::fetch_basic_logger("MAC")) {}
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void pack();
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void unpack(const uint8_t* payload, const uint32_t& len);
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uint32_t get_num_subpdus();
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const mac_sch_subpdu_nr& get_subpdu(const uint32_t& index);
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bool is_ulsch();
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void init_tx(byte_buffer_t* buffer_, uint32_t pdu_len_, bool is_ulsch_ = false);
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void init_rx(bool ulsch_ = false);
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// Add SDU or CEs to PDU
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// All functions will return SRSLTE_SUCCESS on success, and SRSLE_ERROR otherwise
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uint32_t add_sdu(const uint32_t lcid_, const uint8_t* payload_, const uint32_t len_);
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uint32_t add_crnti_ce(const uint16_t crnti_);
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uint32_t add_se_phr_ce(const uint8_t phr_, const uint8_t pcmax_);
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uint32_t add_sbsr_ce(const mac_sch_subpdu_nr::lcg_bsr_t bsr_);
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uint32_t get_remaing_len();
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private:
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uint32_t size_header_sdu(const uint32_t lcid_, const uint32_t nbytes);
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/// Private helper that adds a subPDU to the MAC PDU
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uint32_t add_sudpdu(mac_sch_subpdu_nr& subpdu);
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bool ulsch = false;
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std::vector<mac_sch_subpdu_nr> subpdus;
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byte_buffer_t* buffer = nullptr;
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uint32_t pdu_len = 0;
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uint32_t remaining_len = 0;
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srslog::basic_logger& logger;
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};
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} // namespace srslte
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#endif // SRSLTE_MAC_SCH_PDU_NR_H
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