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authorHarald Welte <laforge@gnumonks.org>2010-03-06 11:34:27 +0100
committerHarald Welte <laforge@gnumonks.org>2010-03-06 11:34:27 +0100
commit63d3e396e79bae0e3580a8813a8c1c0166a51b59 (patch)
tree4315ae6c61b4162e4f00538f9e12f51561ac7c9b /src
parent380ae25052e5b09922d9a3642ad8743a22330f86 (diff)
introduce RxLev statistics module, an efficient way for power scan data
Diffstat (limited to 'src')
-rw-r--r--src/Makefile.am2
-rw-r--r--src/rxlev_stat.c94
2 files changed, 95 insertions, 1 deletions
diff --git a/src/Makefile.am b/src/Makefile.am
index b6826ea5..99424522 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -9,4 +9,4 @@ lib_LTLIBRARIES = libosmocore.la
libosmocore_la_SOURCES = msgb.c timer.c talloc.c select.c signal.c \
tlv_parser.c bitvec.c comp128.c gsm_utils.c statistics.c \
- write_queue.c utils.c rsl.c gsm48.c
+ write_queue.c utils.c rsl.c gsm48.c rxlev_stat.c
diff --git a/src/rxlev_stat.c b/src/rxlev_stat.c
new file mode 100644
index 00000000..1bfd6795
--- /dev/null
+++ b/src/rxlev_stat.c
@@ -0,0 +1,94 @@
+/* Rx Level statistics */
+
+/* (C) 2010 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 General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <stdint.h>
+
+#include <osmocore/bitvec.h>
+#include <osmocore/rxlev_stat.h>
+
+int bitvec_find_bit_pos(const struct bitvec *bv, unsigned int n, enum bit_value val)
+{
+ unsigned int i;
+
+ for (i = n; i < bv->data_len*8; i++) {
+ if (bitvec_get_bit_pos(bv, i) == val)
+ return i;
+ }
+
+ return -1;
+}
+
+void rxlev_stat_input(struct rxlev_stats *st, uint16_t arfcn, uint8_t rxlev)
+{
+ struct bitvec bv;
+
+ if (rxlev >= NUM_RXLEVS)
+ rxlev = NUM_RXLEVS-1;
+
+ bv.data_len = NUM_ARFCNS/8;
+ bv.data = st->rxlev_buckets[rxlev];
+
+ bitvec_set_bit_pos(&bv, arfcn, ONE);
+}
+
+/* get the next ARFCN that has the specified Rxlev */
+int16_t rxlev_stat_get_next(const struct rxlev_stats *st, uint8_t rxlev, int16_t arfcn)
+{
+ struct bitvec bv;
+
+ if (rxlev >= NUM_RXLEVS)
+ rxlev = NUM_RXLEVS-1;
+
+ bv.data_len = NUM_ARFCNS/8;
+
+ if (arfcn < 0)
+ arfcn = -1;
+
+ bv.data = st->rxlev_buckets[rxlev];
+
+ return bitvec_find_bit_pos(&bv, arfcn+1, ONE);
+}
+
+void rxlev_stat_reset(struct rxlev_stats *st)
+{
+ memset(st, 0, sizeof(*st));
+}
+
+void rxlev_stat_dump(const struct rxlev_stats *st)
+{
+ int i;
+
+ for (i = NUM_RXLEVS-1; i >= 0; i--) {
+ int16_t arfcn = -1;
+
+ printf("ARFCN with RxLev %u: ", i);
+ while ((arfcn = rxlev_stat_get_next(st, i, arfcn)) >= 0) {
+ printf("%u ", arfcn);
+ }
+ printf("\n");
+ }
+}