libosmogsm 1.9.0.196-9975
Osmocom GSM library
gsm0502.h File Reference
#include <stdint.h>
#include <osmocom/gsm/protocol/gsm_04_08.h>
#include <osmocom/gsm/protocol/gsm_08_58.h>

Go to the source code of this file.

Macros

#define GSM_TDMA_FN_DURATION_nS   4615384 /* in 1e−9 seconds (approx) */
 
#define GSM_TDMA_FN_DURATION_uS   4615 /* in 1e-6 seconds (approx) */
 
#define GSM_TDMA_SUPERFRAME   (26 * 51)
 
#define GSM_TDMA_HYPERFRAME   (2048 * GSM_TDMA_SUPERFRAME)
 
#define GSM_TDMA_FN_SUM(a, b)    (((a) + (b)) % GSM_TDMA_HYPERFRAME)
 Return the sum of two specified TDMA frame numbers (summation) More...
 
#define GSM_TDMA_FN_SUB(a, b)    (((a) + GSM_TDMA_HYPERFRAME - (b)) % GSM_TDMA_HYPERFRAME)
 Return the difference of two specified TDMA frame numbers (subtraction) More...
 
#define GSM_TDMA_FN_DIFF(a, b)    OSMO_MIN(GSM_TDMA_FN_SUB(a, b), GSM_TDMA_FN_SUB(b, a))
 Return the minimum difference of two specified TDMA frame numbers (distance) More...
 
#define GSM_TDMA_FN_INC(fn)    ((fn) = GSM_TDMA_FN_SUM((fn), 1))
 Increment the given TDMA frame number by 1 and return the result (like ++fn) More...
 
#define GSM_TDMA_FN_DEC(fn)    ((fn) = GSM_TDMA_FN_SUB((fn), 1))
 Decrement the given TDMA frame number by 1 and return the result (like –fn) More...
 
#define GSM_NBITS_NB_GMSK_TAIL   3
 
#define GSM_NBITS_NB_GMSK_PAYLOAD   (2 * 58)
 
#define GSM_NBITS_NB_GMSK_TRAIN_SEQ   26
 
#define GSM_NBITS_NB_GMSK_BURST   148 /* without guard period */
 
#define GSM_NBITS_NB_8PSK_TAIL   (GSM_NBITS_NB_GMSK_TAIL * 3)
 
#define GSM_NBITS_NB_8PSK_PAYLOAD   (GSM_NBITS_NB_GMSK_PAYLOAD * 3)
 
#define GSM_NBITS_NB_8PSK_TRAIN_SEQ   (GSM_NBITS_NB_GMSK_TRAIN_SEQ * 3)
 
#define GSM_NBITS_NB_8PSK_BURST   (GSM_NBITS_NB_GMSK_BURST * 3)
 
#define GSM_NBITS_SB_GMSK_TAIL   GSM_NBITS_NB_GMSK_TAIL
 
#define GSM_NBITS_SB_GMSK_PAYLOAD   (2 * 39)
 
#define GSM_NBITS_SB_GMSK_ETRAIN_SEQ   64
 
#define GSM_NBITS_SB_GMSK_BURST   GSM_NBITS_NB_GMSK_BURST
 
#define GSM_NBITS_DB_GMSK_TAIL   GSM_NBITS_NB_GMSK_TAIL
 
#define GSM_NBITS_DB_GMSK_MIXED   142
 
#define GSM_NBITS_DB_GMSK_BURST   GSM_NBITS_NB_GMSK_BURST
 
#define GSM_NBITS_AB_GMSK_ETAIL   8
 
#define GSM_NBITS_AB_GMSK_SYNCH_SEQ   41
 
#define GSM_NBITS_AB_GMSK_PAYLOAD   36
 
#define GSM_NBITS_AB_GMSK_TAIL   GSM_NBITS_NB_GMSK_TAIL
 
#define GSM_NBITS_AB_GMSK_BURST   GSM_NBITS_NB_GMSK_BURST
 

Enumerations

enum  gsm0502_fn_remap_channel {
  FN_REMAP_TCH_F ,
  FN_REMAP_TCH_H0 ,
  FN_REMAP_TCH_H1 ,
  FN_REMAP_FACCH_F ,
  FN_REMAP_FACCH_H0 ,
  FN_REMAP_FACCH_H1 ,
  FN_REMAP_MAX
}
 

Functions

static int gsm0502_fncmp (uint32_t fn1, uint32_t fn2)
 Compare the given TDMA FNs, taking the wrapping into account. More...
 
static unsigned int gsm0502_get_n_pag_blocks (const struct gsm48_control_channel_descr *chan_desc)
 
static unsigned int gsm0502_get_ccch_group (uint64_t imsi, unsigned int bs_cc_chans, unsigned int n_pag_blocks)
 
static unsigned int gsm0502_get_paging_group (uint64_t imsi, unsigned int bs_cc_chans, int n_pag_blocks)
 
unsigned int gsm0502_calc_paging_group (const struct gsm48_control_channel_descr *chan_desc, uint64_t imsi)
 
uint32_t gsm0502_fn_remap (uint32_t fn, enum gsm0502_fn_remap_channel channel)
 Calculate the frame number of the beginning of a block. More...
 
uint16_t gsm0502_hop_seq_gen (const struct gsm_time *t, uint8_t hsn, uint8_t maio, size_t n, const uint16_t *ma)
 Hopping sequence generation as per 3GPP TS 45.002, section 6.2.3. More...
 
int gsm0502_fn2ccch_block (uint32_t fn)
 Calculate CCCH block number from the given TDMA frame number. More...