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/*
* (C) 2013,2014 by Holger Hans Peter Freyther
*
* 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/>.
*/
#include <osmocom/core/talloc.h>
#include <osmocom/core/application.h>
#include <osmo-bts/bts.h>
#include <osmo-bts/logging.h>
#include <osmo-bts/l1sap.h>
#include <osmo-bts/power_control.h>
#include <stdio.h>
static inline void apply_power_test(struct gsm_lchan *lchan, int rxlev, int exp_ret, uint8_t exp_current)
{
int ret = lchan_ms_pwr_ctrl(lchan, lchan->ms_power_ctrl.current, rxlev);
printf("power control [%d]: MS current power %u\n", ret, lchan->ms_power_ctrl.current);
OSMO_ASSERT(ret == exp_ret);
OSMO_ASSERT(lchan->ms_power_ctrl.current == exp_current);
}
static void test_power_loop(void)
{
struct gsm_bts bts;
struct gsm_bts_trx trx;
struct gsm_bts_trx_ts ts;
struct gsm_lchan *lchan;
memset(&bts, 0, sizeof(bts));
memset(&trx, 0, sizeof(trx));
memset(&ts, 0, sizeof(ts));
lchan = &ts.lchan[0];
lchan->ts = &ts;
ts.trx = &trx;
trx.bts = &bts;
bts.band = GSM_BAND_1800;
trx.ms_pwr_ctl_soft = true;
bts.ul_power_target = -75;
lchan->state = LCHAN_S_NONE;
lchan->ms_power_ctrl.current = ms_pwr_ctl_lvl(GSM_BAND_1800, 0);
OSMO_ASSERT(lchan->ms_power_ctrl.current == 15);
lchan->ms_power_ctrl.max = ms_pwr_ctl_lvl(GSM_BAND_1800, 26);
OSMO_ASSERT(lchan->ms_power_ctrl.max == 2);
/* Simply clamping */
apply_power_test(lchan, -60, 0, 15);
/*
* Now 15 dB too little and we should power it up. Could be a
* power level of 7 or 8 for 15 dBm. However, since we limit peace at
* which we change values, expect several steps of MS_RAISE_MAX_DB/2 levels:
*/
apply_power_test(lchan, -90, 1, 13);
apply_power_test(lchan, -90, 1, 11);
apply_power_test(lchan, -90, 1, 9);
apply_power_test(lchan, -90, 1, 7);
apply_power_test(lchan, -90, 1, 5);
/* Check good RSSI value keeps it at same power level: */
apply_power_test(lchan, bts.ul_power_target, 0, 5);
apply_power_test(lchan, -90, 1, 3);
apply_power_test(lchan, -90, 1, 2); /* .max is pwr lvl 2 */
apply_power_test(lchan, -90, 0, 2); /* .max is pwr lvl 2 */
lchan->ms_power_ctrl.max = ms_pwr_ctl_lvl(GSM_BAND_1800, 30);
OSMO_ASSERT(lchan->ms_power_ctrl.max == 0);
apply_power_test(lchan, -90, 1, 0); /* .max is pwr lvl 0 */
apply_power_test(lchan, -90, 0, 0); /* .max is pwr lvl 0 */
lchan->ms_power_ctrl.max = ms_pwr_ctl_lvl(GSM_BAND_1800, 36);
OSMO_ASSERT(lchan->ms_power_ctrl.max == 29);
apply_power_test(lchan, -90, 1, 30);
apply_power_test(lchan, -90, 1, 29);
apply_power_test(lchan, -90, 0, 29);
/* Check good RSSI value keeps it at same power level: */
apply_power_test(lchan, bts.ul_power_target, 0, 29);
/* Now go down, steps are double size in this direction: */
apply_power_test(lchan, -45, 1, 1);
apply_power_test(lchan, -45, 1, 5);
apply_power_test(lchan, -45, 1, 9);
/* Go down only one level down and up: */
apply_power_test(lchan, bts.ul_power_target + 2, 1, 10);
apply_power_test(lchan, bts.ul_power_target - 2, 1, 9);
/* Check if BSC requesting a low max power is applied after loop calculation: */
lchan->ms_power_ctrl.max = ms_pwr_ctl_lvl(GSM_BAND_1800, 2);
OSMO_ASSERT(lchan->ms_power_ctrl.max == 14);
apply_power_test(lchan, bts.ul_power_target + 2, 1, 14);
/* Set back a more normal max: */
lchan->ms_power_ctrl.max = ms_pwr_ctl_lvl(GSM_BAND_1800, 30);
OSMO_ASSERT(lchan->ms_power_ctrl.max == 0);
/* Fix it and jump down */
lchan->ms_power_ctrl.fixed = true;
apply_power_test(lchan, -60, 0, 14);
/* And leave it again */
lchan->ms_power_ctrl.fixed = false;
apply_power_test(lchan, -40, 1, 15);
}
int main(int argc, char **argv)
{
printf("Testing power loop...\n");
tall_bts_ctx = talloc_named_const(NULL, 1, "OsmoBTS context");
msgb_talloc_ctx_init(tall_bts_ctx, 0);
osmo_init_logging2(tall_bts_ctx, &bts_log_info);
test_power_loop();
printf("Power loop test OK\n");
return 0;
}
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