libosmogsm  0.6.3
Osmocom GSM library
gsm0502.h
1 #ifndef OSMOCOM_GSM_0502_H
2 #define OSMOCOM_GSM_0502_H
3 
4 #include <stdint.h>
5 
6 #include <osmocom/gsm/protocol/gsm_04_08.h>
8 
9 /* Table 5 Clause 7 TS 05.02 */
10 static inline unsigned int
11 gsm0502_get_n_pag_blocks(struct gsm48_control_channel_descr *chan_desc)
12 {
13  if (chan_desc->ccch_conf == RSL_BCCH_CCCH_CONF_1_C)
14  return 3 - chan_desc->bs_ag_blks_res;
15  else
16  return 9 - chan_desc->bs_ag_blks_res;
17 }
18 
19 /* Chapter 6.5.2 of TS 05.02 */
20 static inline unsigned int
21 gsm0502_get_ccch_group(uint64_t imsi, unsigned int bs_cc_chans,
22  unsigned int n_pag_blocks)
23 {
24  return (imsi % 1000) % (bs_cc_chans * n_pag_blocks) / n_pag_blocks;
25 }
26 
27 /* Chapter 6.5.2 of TS 05.02 */
28 static inline unsigned int
29 gsm0502_get_paging_group(uint64_t imsi, unsigned int bs_cc_chans,
30  int n_pag_blocks)
31 {
32  return (imsi % 1000) % (bs_cc_chans * n_pag_blocks) % n_pag_blocks;
33 }
34 
35 unsigned int
36 gsm0502_calc_paging_group(struct gsm48_control_channel_descr *chan_desc, uint64_t imsi);
37 
38 #endif