introduce RxLev statistics module, an efficient way for power scan data
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380ae25052
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63d3e396e7
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@ -1,6 +1,6 @@
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osmocore_HEADERS = signal.h linuxlist.h timer.h talloc.h msgb.h select.h \
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tlv.h bitvec.h comp128.h statistics.h gsm_utils.h utils.h \
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gsmtap.h write_queue.h rsl.h gsm48.h
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gsmtap.h write_queue.h rsl.h gsm48.h rxlev_stat.h
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osmocoredir = $(includedir)/osmocore
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@ -0,0 +1,22 @@
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#ifndef _OSMOCORE_RXLEV_STATS_H
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#define _OSMOCORE_RXLEV_STATS_H
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#define NUM_RXLEVS 32
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#define NUM_ARFCNS 1024
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struct rxlev_stats {
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/* the maximum number of ARFCN's is 1024, and there are 32 RxLevels,
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* so in we keep one 1024bit-bitvec for each RxLev */
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uint8_t rxlev_buckets[NUM_RXLEVS][NUM_ARFCNS/8];
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};
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void rxlev_stat_input(struct rxlev_stats *st, uint16_t arfcn, uint8_t rxlev);
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/* get the next ARFCN that has the specified Rxlev */
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int16_t rxlev_stat_get_next(const struct rxlev_stats *st, uint8_t rxlev, int16_t arfcn);
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void rxlev_stat_reset(struct rxlev_stats *st);
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void rxlev_stat_dump(const struct rxlev_stats *st);
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#endif /* _OSMOCORE_RXLEV_STATS_H */
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@ -9,4 +9,4 @@ lib_LTLIBRARIES = libosmocore.la
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libosmocore_la_SOURCES = msgb.c timer.c talloc.c select.c signal.c \
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tlv_parser.c bitvec.c comp128.c gsm_utils.c statistics.c \
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write_queue.c utils.c rsl.c gsm48.c
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write_queue.c utils.c rsl.c gsm48.c rxlev_stat.c
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@ -0,0 +1,94 @@
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/* Rx Level statistics */
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/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <stdint.h>
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#include <osmocore/bitvec.h>
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#include <osmocore/rxlev_stat.h>
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int bitvec_find_bit_pos(const struct bitvec *bv, unsigned int n, enum bit_value val)
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{
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unsigned int i;
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for (i = n; i < bv->data_len*8; i++) {
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if (bitvec_get_bit_pos(bv, i) == val)
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return i;
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}
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return -1;
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}
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void rxlev_stat_input(struct rxlev_stats *st, uint16_t arfcn, uint8_t rxlev)
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{
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struct bitvec bv;
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if (rxlev >= NUM_RXLEVS)
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rxlev = NUM_RXLEVS-1;
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bv.data_len = NUM_ARFCNS/8;
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bv.data = st->rxlev_buckets[rxlev];
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bitvec_set_bit_pos(&bv, arfcn, ONE);
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}
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/* get the next ARFCN that has the specified Rxlev */
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int16_t rxlev_stat_get_next(const struct rxlev_stats *st, uint8_t rxlev, int16_t arfcn)
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{
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struct bitvec bv;
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if (rxlev >= NUM_RXLEVS)
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rxlev = NUM_RXLEVS-1;
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bv.data_len = NUM_ARFCNS/8;
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if (arfcn < 0)
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arfcn = -1;
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bv.data = st->rxlev_buckets[rxlev];
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return bitvec_find_bit_pos(&bv, arfcn+1, ONE);
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}
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void rxlev_stat_reset(struct rxlev_stats *st)
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{
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memset(st, 0, sizeof(*st));
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}
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void rxlev_stat_dump(const struct rxlev_stats *st)
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{
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int i;
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for (i = NUM_RXLEVS-1; i >= 0; i--) {
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int16_t arfcn = -1;
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printf("ARFCN with RxLev %u: ", i);
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while ((arfcn = rxlev_stat_get_next(st, i, arfcn)) >= 0) {
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printf("%u ", arfcn);
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}
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printf("\n");
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}
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}
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