85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
/* Measurement Processing */
|
|
|
|
/* (C) 2009 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 Affero 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 <stdlib.h>
|
|
#include <errno.h>
|
|
|
|
#include <osmocore/talloc.h>
|
|
#include <osmocore/msgb.h>
|
|
#include <openbsc/debug.h>
|
|
#include <openbsc/gsm_data.h>
|
|
#include <openbsc/meas_rep.h>
|
|
#include <openbsc/signal.h>
|
|
|
|
/* process an already parsed measurement report */
|
|
static int process_meas_rep(struct gsm_meas_rep *mr)
|
|
{
|
|
struct gsm_meas_rep_cell *mr_cell = NULL;
|
|
unsigned int best_better_db;
|
|
int i;
|
|
|
|
/* FIXME: implement actual averaging over multiple measurement
|
|
* reports */
|
|
|
|
/* find the best cell in this report that is at least RXLEV_HYST
|
|
* better than the current serving cell */
|
|
for (i = 0; i < mr->num_cell; i++) {
|
|
unsigned int better;
|
|
if (mr->cell[i].rxlev < mr->dl.full.rx_lev + RXLEV_HYST)
|
|
continue;
|
|
|
|
better = mr->cell[i].rxlev - mr->dl.full.rx_lev;
|
|
if (better > best_better_db) {
|
|
mr_cell = &mr->cell[i];
|
|
best_better_db = better;
|
|
}
|
|
}
|
|
|
|
if (mr_cell)
|
|
return handover_to_arfcn_bsic(mr->lchan, mr_cell->arfcn,
|
|
mr_cell->bsic);
|
|
return 0;
|
|
}
|
|
|
|
static int meas_proc_sig_cb(unsigned int subsys, unsigned int signal,
|
|
void *handler_data, void *signal_data)
|
|
{
|
|
struct gsm_lchan *lchan;
|
|
struct gsm_meas_rep *mr;
|
|
|
|
if (subsys != SS_LCHAN)
|
|
return 0;
|
|
|
|
switch (signal) {
|
|
case S_LCHAN_MEAS_REP:
|
|
mr = signal_data;
|
|
process_meas_rep(mr);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __attribute__((constructor)) void on_dso_load_meas(void)
|
|
{
|
|
register_signal_handler(SS_LCHAN, meas_proc_sig_cb, NULL);
|
|
}
|