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156 lines
6.1 KiB
C++
156 lines
6.1 KiB
C++
/*
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* Copyright 2013-2019 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE 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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* srsLTE 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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#ifndef SRSLTE_RLC_INTERFACE_H
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#define SRSLTE_RLC_INTERFACE_H
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// for custom constructors
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#include "srslte/asn1/rrc_asn1.h"
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#define RLC_TX_QUEUE_LEN (128)
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namespace srslte {
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typedef enum{
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RLC_MODE_TM = 0,
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RLC_MODE_UM,
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RLC_MODE_AM,
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RLC_MODE_N_ITEMS,
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}rlc_mode_t;
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static const char rlc_mode_text[RLC_MODE_N_ITEMS][20] = {"Transparent Mode",
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"Unacknowledged Mode",
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"Acknowledged Mode"};
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typedef enum {
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RLC_UMD_SN_SIZE_5_BITS = 0,
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RLC_UMD_SN_SIZE_10_BITS,
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RLC_UMD_SN_SIZE_N_ITEMS,
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} rlc_umd_sn_size_t;
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static const char rlc_umd_sn_size_text[RLC_UMD_SN_SIZE_N_ITEMS][20] = {"5 bits", "10 bits"};
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static const uint16_t rlc_umd_sn_size_num[RLC_UMD_SN_SIZE_N_ITEMS] = {5, 10};
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typedef struct {
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/****************************************************************************
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* Configurable parameters
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* Ref: 3GPP TS 36.322 v10.0.0 Section 7
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***************************************************************************/
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// TX configs
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int32_t t_poll_retx; // Poll retx timeout (ms)
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int32_t poll_pdu; // Insert poll bit after this many PDUs
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int32_t poll_byte; // Insert poll bit after this much data (KB)
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uint32_t max_retx_thresh; // Max number of retx
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// RX configs
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int32_t t_reordering; // Timer used by rx to detect PDU loss (ms)
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int32_t t_status_prohibit; // Timer used by rx to prohibit tx of status PDU (ms)
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} srslte_rlc_am_config_t;
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typedef struct {
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/****************************************************************************
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* Configurable parameters
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* Ref: 3GPP TS 36.322 v10.0.0 Section 7
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***************************************************************************/
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int32_t t_reordering; // Timer used by rx to detect PDU loss (ms)
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rlc_umd_sn_size_t tx_sn_field_length; // Number of bits used for tx (UL) sequence number
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rlc_umd_sn_size_t rx_sn_field_length; // Number of bits used for rx (DL) sequence number
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uint32_t rx_window_size;
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uint32_t rx_mod; // Rx counter modulus
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uint32_t tx_mod; // Tx counter modulus
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bool is_mrb; // Whether this is a multicast bearer
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} srslte_rlc_um_config_t;
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class srslte_rlc_config_t
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{
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public:
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rlc_mode_t rlc_mode;
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srslte_rlc_am_config_t am;
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srslte_rlc_um_config_t um;
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uint32_t tx_queue_length;
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// Default ctor
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srslte_rlc_config_t() : rlc_mode(RLC_MODE_TM), am(), um(), tx_queue_length(RLC_TX_QUEUE_LEN){};
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// Constructor based on rrc_asn1's RLC config
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srslte_rlc_config_t(asn1::rrc::rlc_cfg_c* cnfg) : rlc_mode(RLC_MODE_AM), am(), um()
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{
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// update RLC mode to internal mode struct
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rlc_mode = (cnfg->type() == asn1::rrc::rlc_cfg_c::types::am) ? RLC_MODE_AM : RLC_MODE_UM;
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switch(rlc_mode)
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{
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case RLC_MODE_AM:
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am.t_poll_retx = cnfg->am().ul_am_rlc.t_poll_retx.to_number();
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am.poll_pdu = cnfg->am().ul_am_rlc.poll_pdu.to_number();
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am.poll_byte = cnfg->am().ul_am_rlc.poll_byte.to_number() * 1000; // KB
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am.max_retx_thresh = cnfg->am().ul_am_rlc.max_retx_thres.to_number();
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am.t_reordering = cnfg->am().dl_am_rlc.t_reordering.to_number();
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am.t_status_prohibit = cnfg->am().dl_am_rlc.t_status_prohibit.to_number();
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break;
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case RLC_MODE_UM:
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um.t_reordering = cnfg->um_bi_dir().dl_um_rlc.t_reordering.to_number();
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um.rx_sn_field_length = (rlc_umd_sn_size_t)cnfg->um_bi_dir().dl_um_rlc.sn_field_len.value;
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um.rx_window_size = (RLC_UMD_SN_SIZE_5_BITS == um.rx_sn_field_length) ? 16 : 512;
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um.rx_mod = (RLC_UMD_SN_SIZE_5_BITS == um.rx_sn_field_length) ? 32 : 1024;
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um.tx_sn_field_length = (rlc_umd_sn_size_t)cnfg->um_bi_dir().ul_um_rlc.sn_field_len.value;
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um.tx_mod = (RLC_UMD_SN_SIZE_5_BITS == um.tx_sn_field_length) ? 32 : 1024;
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break;
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// case asn1::rrc::rlc_cfg_c::types::um_uni_dir_ul:
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// um.tx_sn_field_length = (rlc_umd_sn_size_t)cnfg->um_uni_dir_ul().ul_um_rlc.sn_field_len.value;
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// um.tx_mod = (RLC_UMD_SN_SIZE_5_BITS == um.tx_sn_field_length) ? 32 : 1024;
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// break;
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// case asn1::rrc::rlc_cfg_c::types::um_uni_dir_dl:
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// um.t_reordering = cnfg->um_uni_dir_dl().dl_um_rlc.t_reordering.to_number();
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// um.rx_sn_field_length = (rlc_umd_sn_size_t)cnfg->um_uni_dir_dl().dl_um_rlc.sn_field_len.value;
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// um.rx_window_size = (RLC_UMD_SN_SIZE_5_BITS == um.rx_sn_field_length) ? 16 : 512;
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// um.rx_mod = (RLC_UMD_SN_SIZE_5_BITS == um.rx_sn_field_length) ? 32 : 1024;
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// break;
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default:
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// Handle default case
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break;
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}
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tx_queue_length = RLC_TX_QUEUE_LEN;
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}
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// Factory for MCH
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static srslte_rlc_config_t mch_config()
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{
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srslte_rlc_config_t cfg;
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cfg.rlc_mode = RLC_MODE_UM;
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cfg.um.t_reordering = 45;
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cfg.um.rx_sn_field_length = RLC_UMD_SN_SIZE_5_BITS;
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cfg.um.rx_window_size = 16;
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cfg.um.rx_mod = 32;
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cfg.um.tx_sn_field_length = RLC_UMD_SN_SIZE_5_BITS;
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cfg.um.tx_mod = 32;
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cfg.um.is_mrb = true;
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cfg.tx_queue_length = 1024;
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return cfg;
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}
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};
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} // namespace srslte
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#endif // SRSLTE_RLC_INTERFACE_H
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