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osmo-bts-trx: ul-pwr-control

This commit is contained in:
Neels Hofmeyr 2018-04-16 13:49:01 +02:00 committed by Neels Hofmeyr
parent bea9c3330e
commit d1f99fdf80
1 changed files with 26 additions and 31 deletions
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57
src/osmo-bts-trx/loops.c
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@ -39,50 +39,38 @@
* MS Power loop
*/
static int ms_power_diff(struct gsm_lchan *lchan, uint8_t chan_nr, int8_t diff)
static int ms_power_diff(struct gsm_lchan *lchan, uint8_t chan_nr, int8_t deltaDb)
{
struct gsm_bts_trx *trx = lchan->ts->trx;
uint16_t arfcn = trx->arfcn;
enum gsm_band band = gsm_arfcn2band(arfcn);
int8_t new_power;
new_power = lchan->ms_power_ctrl.current - (diff >> 1);
if (diff == 0)
return 0;
/* Convert current level to dBm, and apply delta. */
new_power = ms_pwr_dbm(band, lchan->ms_power) + deltaDb;
/* Clip minimum */
if (new_power < 0)
new_power = 0;
// FIXME: to go above 1W, we need to know classmark of MS
if (arfcn >= 512 && arfcn <= 885) {
if (new_power > 15)
new_power = 15;
} else {
if (new_power > 19)
new_power = 19;
}
/* Convert to a MS power control level. ms_pwr_ctl_lvl() clips based on band. */
new_power = ms_pwr_ctl_lvl(band, new_power);
/* a higher value means a lower level (and vice versa) */
if (new_power > lchan->ms_power_ctrl.current + MS_LOWER_MAX)
new_power = lchan->ms_power_ctrl.current + MS_LOWER_MAX;
else if (new_power < lchan->ms_power_ctrl.current - MS_RAISE_MAX)
new_power = lchan->ms_power_ctrl.current - MS_RAISE_MAX;
if (lchan->ms_power_ctrl.current == new_power) {
LOGP(DLOOP, LOGL_INFO, "Keeping MS new_power of trx=%u "
if (lchan->ms_power == new_power) {
LOGP(DLOOP, LOGL_INFO, "Keeping MS power of trx=%u "
"chan_nr=0x%02x at control level %d (%d dBm)\n",
trx->nr, chan_nr, new_power,
MS_PWR_DBM(arfcn, new_power));
ms_pwr_dbm(band, new_power));
return 0;
}
LOGP(DLOOP, LOGL_INFO, "%s MS new_power of trx=%u chan_nr=0x%02x from "
"control level %d (%d dBm) to %d (%d dBm)\n",
(diff > 0) ? "Raising" : "Lowering",
trx->nr, chan_nr, lchan->ms_power_ctrl.current,
MS_PWR_DBM(arfcn, lchan->ms_power_ctrl.current), new_power,
MS_PWR_DBM(arfcn, new_power));
LOGP(DLOOP, LOGL_INFO, "Changing MS power of trx=%u chan_nr=0x%02x from "
"control level %d (%d dBm) by %+d (%+d dBm) to %d (%d dBm)\n",
trx->nr, chan_nr,
lchan->ms_power, ms_pwr_dbm(band, lchan->ms_power),
new_power - lchan->ms_power, ms_pwr_dbm(band, new_power) - ms_pwr_dbm(band, lchan->ms_power),
new_power, ms_pwr_dbm(band, new_power));
lchan->ms_power_ctrl.current = new_power;
@ -102,8 +90,12 @@ static int ms_power_val(struct l1sched_chan_state *chan_state, int8_t rssi)
chan_state->meas.rssi_got_burst = 1;
/* store and process RSSI */
if (chan_state->meas.rssi_valid_count >= ARRAY_SIZE(chan_state->meas.rssi))
if (chan_state->meas.rssi_valid_count
>= ARRAY_SIZE(chan_state->meas.rssi)) {
LOGP(DLOOP, LOGL_DEBUG, "RSSI values full");
return 0;
}
chan_state->meas.rssi[chan_state->meas.rssi_valid_count++] = rssi;
return 0;
@ -144,8 +136,11 @@ static int ms_power_clock(struct gsm_lchan *lchan,
* power level */
if (chan_state->meas.rssi_valid_count == 0)
return 0;
for (rssi = 999, i = 0; i < chan_state->meas.rssi_valid_count; i++) {
if (rssi > chan_state->meas.rssi[i])
/* find smallest rssi */
rssi = chan_state->meas.rssi[0];
for (i = 1; i < chan_state->meas.rssi_valid_count; i++) {
if (chan_state->meas.rssi[i] < rssi)
rssi = chan_state->meas.rssi[i];
}