mirror of https://github.com/pvnis/srsRAN_4G.git
refactor RLC to use RAT-agnostic config
Andre Puschmann
8 years ago
parent
9398e0eff9
commit
7ca0988ea3
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/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsUE library.
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*
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* srsUE 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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* srsUE 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 RLC_INTERFACE_H
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#define RLC_INTERFACE_H
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// for custom constructors
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#include "srslte/asn1/liblte_rrc.h"
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namespace srslte {
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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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} 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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LIBLTE_RRC_RLC_MODE_ENUM 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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// Constructor based on liblte's RLC config
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srslte_rlc_config_t(LIBLTE_RRC_RLC_CONFIG_STRUCT *cnfg) : rlc_mode(cnfg->rlc_mode), am(), um()
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{
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switch(rlc_mode)
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{
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case LIBLTE_RRC_RLC_MODE_AM:
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am.t_poll_retx = liblte_rrc_t_poll_retransmit_num[cnfg->ul_am_rlc.t_poll_retx];
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am.poll_pdu = liblte_rrc_poll_pdu_num[cnfg->ul_am_rlc.poll_pdu];
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am.poll_byte = liblte_rrc_poll_byte_num[cnfg->ul_am_rlc.poll_byte]*1000; // KB
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am.max_retx_thresh = liblte_rrc_max_retx_threshold_num[cnfg->ul_am_rlc.max_retx_thresh];
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am.t_reordering = liblte_rrc_t_reordering_num[cnfg->dl_am_rlc.t_reordering];
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am.t_status_prohibit = liblte_rrc_t_status_prohibit_num[cnfg->dl_am_rlc.t_status_prohibit];
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break;
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case LIBLTE_RRC_RLC_MODE_UM_BI:
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um.t_reordering = liblte_rrc_t_reordering_num[cnfg->dl_um_bi_rlc.t_reordering];
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um.rx_sn_field_length = (rlc_umd_sn_size_t)cnfg->dl_um_bi_rlc.sn_field_len;
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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->ul_um_bi_rlc.sn_field_len;
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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 LIBLTE_RRC_RLC_MODE_UM_UNI_UL:
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um.tx_sn_field_length = (rlc_umd_sn_size_t)cnfg->ul_um_uni_rlc.sn_field_len;
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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 LIBLTE_RRC_RLC_MODE_UM_UNI_DL:
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um.t_reordering = liblte_rrc_t_reordering_num[cnfg->dl_um_uni_rlc.t_reordering];
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um.rx_sn_field_length = (rlc_umd_sn_size_t)cnfg->dl_um_uni_rlc.sn_field_len;
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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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}
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};
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} // namespace srslte
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#endif // RLC_INTERFACE_H
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