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/* Auxiliary scheduler utilities.
*
* (C) 2017 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#pragma once
#include <stdint.h>
#include <errno.h>
#include <stdbool.h>
#include <osmo-bts/scheduler.h>
extern void *tall_bts_ctx;
/* Compute the bit error rate in 1/10000 units */
static inline uint16_t compute_ber10k(int n_bits_total, int n_errors)
{
if (n_bits_total == 0)
return 10000;
else
return 10000 * n_errors / n_bits_total;
}
/* 3GPP TS 45.009, table 3.2.1.3-{1,3}: AMR on Uplink TCH/F */
static const uint8_t sched_tchf_ul_amr_cmi_map[26] = {
[7] = 1, /* TCH/F: first=0 / last=7 */
[16] = 1, /* TCH/F: first=8 / last=16 */
[24] = 1, /* TCH/F: first=17 / last=24 */
};
/* 3GPP TS 45.009, table 3.2.1.3-{2,4}: AMR on Uplink TCH/H */
static const uint8_t sched_tchh_ul_amr_cmi_map[26] = {
[6] = 1, /* TCH/H(0): first=0 / last=6 */
[15] = 1, /* TCH/H(0): first=8 / last=15 */
[23] = 1, /* TCH/H(0): first=17 / last=23 */
[7] = 1, /* TCH/H(1): first=1 / last=7 */
[16] = 1, /* TCH/H(1): first=9 / last=16 */
[24] = 1, /* TCH/H(1): first=18 / last=24 */
};
/*! determine whether an uplink AMR block is CMI according to 3GPP TS 45.009.
* \param[in] fn_begin frame number of the beginning of the block.
* \returns true in case of CMI; false otherwise. */
static inline bool ul_amr_fn_is_cmi(uint32_t fn_begin)
{
switch (fn_begin % 26) {
/*! See also: 3GPP TS 45.009, section 3.2.1.3 Transmitter/Receiver Synchronisation */
/* valid for AHS subslot 0 and AFS: */
case 0:
case 8:
case 17:
/* valid for AHS subslot 1: */
case 1:
case 9:
case 18:
return true;
break;
/* Complementary values for sanity check */
/* valid for AHS subslot 0 and AFS: */
case 4:
case 13:
case 21:
/* valid for AHS subslot 1: */
case 5:
case 14:
case 22:
return false;
break;
default:
LOGP(DL1P, LOGL_DEBUG,
"uplink frame number fn_begin=%u does not mark the beginning of a voice block!\n", fn_begin);
OSMO_ASSERT(false);
return false;
break;
}
}
/*! determine the whether a downlink AMR block is CMI according to 3GPP TS 45.009.
* \param[in] fn_begin frame number of the beginning of the block.
* \returns true in case of CMI; false otherwise. */
static inline bool dl_amr_fn_is_cmi(uint32_t fn_begin)
{
switch (fn_begin % 26) {
/*! See also: 3GPP TS 45.009, section 3.2.1.3 Transmitter/Receiver Synchronisation */
/* valid for AHS subslot 0 and AFS: */
case 4:
case 13:
case 21:
/* valid for AHS subslot 1: */
case 5:
case 14:
case 22:
return true;
break;
/* Complementary values for sanity check */
/* valid for AHS subslot 0 and AFS: */
case 0:
case 8:
case 17:
/* valid for AHS subslot 1: */
case 1:
case 9:
case 18:
return false;
break;
default:
LOGP(DL1P, LOGL_DEBUG,
"downlink frame number fn_begin=%u does not mark the beginning of a voice block!\n", fn_begin);
OSMO_ASSERT(false);
return false;
break;
}
}
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