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-rw-r--r--src/gsm/gsm0502.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/gsm/gsm0502.c b/src/gsm/gsm0502.c
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+/* Paging helper code */
+
+/* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdint.h>
+
+#include <osmocom/gsm/protocol/gsm_04_08.h>
+#include <osmocom/gsm/gsm0502.h>
+#include <osmocom/gsm/gsm48.h>
+#include <osmocom/gsm/rsl.h>
+
+unsigned int
+gsm0502_calc_paging_group(struct gsm48_control_channel_descr *chan_desc, uint64_t imsi)
+{
+ int ccch_conf;
+ int bs_cc_chans;
+ int blocks;
+ unsigned int group;
+
+ ccch_conf = chan_desc->ccch_conf;
+ bs_cc_chans = rsl_ccch_conf_to_bs_cc_chans(ccch_conf);
+ /* code word + 2, as 2 channels equals 0x0 */
+ blocks = gsm48_number_of_paging_subchannels(chan_desc);
+ group = gsm0502_get_paging_group(imsi, bs_cc_chans, blocks);
+
+ return group;
+}