gsm0502.c File Reference

Paging helper code. More...

#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>
#include <osmocom/gsm/gsm_utils.h>
#include <osmocom/core/logging.h>
#include <inttypes.h>

Data Structures
struct	fn_remap_table

Macros
#define	TCH_REPEAT_LENGTH   13
#define	FACCH_F_REPEAT_LENGTH   13
#define	FACCH_H_REPEAT_LENGTH   26
#define	fn_remap_table_from_traffic_block_map(table, map, rows, cols, repeat)

Functions
unsigned int	gsm0502_calc_paging_group (struct gsm48_control_channel_descr *chan_desc, uint64_t imsi)
static	__attribute__ ((constructor))
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...

Variables
static const uint8_t	gsm0502_tch_f_traffic_block_map [3][8]
static const uint8_t	gsm0502_tch_h0_traffic_block_map [3][4]
static const uint8_t	gsm0502_tch_h1_traffic_block_map [3][4]
static const uint8_t	gsm0502_tch_f_facch_block_map [3][8]
static const uint8_t	gsm0502_tch_h0_facch_block_map [3][6]
static const uint8_t	gsm0502_tch_h1_facch_block_map [3][6]
static struct fn_remap_table	tch_f_remap_table
static struct fn_remap_table	tch_h0_remap_table
static struct fn_remap_table	tch_h1_remap_table
static struct fn_remap_table	facch_f_remap_table
static struct fn_remap_table	facch_h0_remap_table
static struct fn_remap_table	facch_h1_remap_table
static struct fn_remap_table *	fn_remap_table_ptr [FN_REMAP_MAX]
static const uint8_t	rn_table [114]

Detailed Description

Paging helper code.

Macro Definition Documentation

FACCH_F_REPEAT_LENGTH

#define FACCH_F_REPEAT_LENGTH   13

FACCH_H_REPEAT_LENGTH

#define FACCH_H_REPEAT_LENGTH   26

fn_remap_table_from_traffic_block_map

#define fn_remap_table_from_traffic_block_map	(		table,
			map,
			rows,
			cols,
			repeat
	)

Value:

        for(i=0;i<rows;i++) { \
                table.blockend[i] = map[i][cols-1]; \
                if(map[i][0] <= map[i][cols-1]) \
                        table.distance[i] = map[i][cols-1] - map[i][0]; \
                else \
                        table.distance[i] = repeat - map[i][0] + map[i][cols-1]; \
        } \
        table.cycle = repeat; \
        table.len = rows;

TCH_REPEAT_LENGTH

#define TCH_REPEAT_LENGTH   13

Function Documentation

__attribute__()

static __attribute__ ( (constructor)  )

static

References facch_f_remap_table, FACCH_F_REPEAT_LENGTH, facch_h0_remap_table, facch_h1_remap_table, FACCH_H_REPEAT_LENGTH, FN_REMAP_FACCH_F, FN_REMAP_FACCH_H0, FN_REMAP_FACCH_H1, fn_remap_table_from_traffic_block_map, fn_remap_table_ptr, FN_REMAP_TCH_F, FN_REMAP_TCH_H0, FN_REMAP_TCH_H1, gsm0502_tch_f_facch_block_map, gsm0502_tch_f_traffic_block_map, gsm0502_tch_h0_facch_block_map, gsm0502_tch_h0_traffic_block_map, gsm0502_tch_h1_facch_block_map, gsm0502_tch_h1_traffic_block_map, tch_f_remap_table, tch_h0_remap_table, tch_h1_remap_table, and TCH_REPEAT_LENGTH.

gsm0502_calc_paging_group()

unsigned int gsm0502_calc_paging_group	(	struct gsm48_control_channel_descr *	chan_desc,
		uint64_t	imsi
	)

References chan_desc, gsm0502_get_paging_group(), gsm48_number_of_paging_subchannels(), and rsl_ccch_conf_to_bs_cc_chans().

gsm0502_fn_remap()

uint32_t gsm0502_fn_remap	(	uint32_t	fn,
		enum gsm0502_fn_remap_channel	channel
	)

Calculate the frame number of the beginning of a block.

Parameters

[in]	fn	frame number of the block ending.
[in]	channel	channel type (see also enum fn_remap_channel).

Returns

frame number of the beginning of the block or input frame number if remapping was not possible.

References ARRAY_SIZE, fn_remap_table::blockend, fn_remap_table::cycle, fn_remap_table::distance, DLGLOBAL, fn_remap_table_ptr, GSM_MAX_FN, fn_remap_table::len, LOGL_ERROR, LOGP, and OSMO_ASSERT.

gsm0502_hop_seq_gen()

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.

Parameters

[in]	t	GSM time (TDMA frame number, T1/T2/T3).
[in]	hsn	Hopping Sequence Number.
[in]	maio	Mobile Allocation Index Offset.
[in]	n	number of entries in mobile allocation (arfcn table).
[in]	ma	array of ARFCNs (sorted in ascending order) representing the Mobile Allocation.

Returns

ARFCN to use for given input parameters at time 't' or Mobile Allocation Index if ma == NULL.

References gsm_time::fn, n, rn_table, gsm_time::t1, gsm_time::t2, and gsm_time::t3.

Variable Documentation

facch_f_remap_table

struct fn_remap_table facch_f_remap_table

static

Referenced by __attribute__().

facch_h0_remap_table

struct fn_remap_table facch_h0_remap_table

static

Referenced by __attribute__().

facch_h1_remap_table

struct fn_remap_table facch_h1_remap_table

static

Referenced by __attribute__().

fn_remap_table_ptr

struct fn_remap_table* fn_remap_table_ptr[FN_REMAP_MAX]

static

Referenced by __attribute__(), and gsm0502_fn_remap().

gsm0502_tch_f_facch_block_map

const uint8_t gsm0502_tch_f_facch_block_map[3][8]

static

Initial value:

= {
        {0, 1, 2, 3, 4, 5, 6, 7},
        {4, 5, 6, 7, 8, 9, 10, 11},
        {8, 9, 10, 11, 0, 1, 2, 3}
}

Referenced by __attribute__().

gsm0502_tch_f_traffic_block_map

const uint8_t gsm0502_tch_f_traffic_block_map[3][8]

static

Initial value:

= {
        {0, 1, 2, 3, 4, 5, 6, 7},
        {4, 5, 6, 7, 8, 9, 10, 11},
        {8, 9, 10, 11, 0, 1, 2, 3}
}

Referenced by __attribute__().

gsm0502_tch_h0_facch_block_map

const uint8_t gsm0502_tch_h0_facch_block_map[3][6]

static

Initial value:

= {
        {0, 2, 4, 6, 8, 10},
        {8, 10, 13, 15, 17, 19},
        {17, 19, 21, 23, 0, 2}
}

Referenced by __attribute__().

gsm0502_tch_h0_traffic_block_map

const uint8_t gsm0502_tch_h0_traffic_block_map[3][4]

static

Initial value:

= {
        {0, 2, 4, 6},
        {4, 6, 8, 10},
        {8, 10, 0, 2}
}

Referenced by __attribute__().

gsm0502_tch_h1_facch_block_map

const uint8_t gsm0502_tch_h1_facch_block_map[3][6]

static

Initial value:

= {
        {1, 3, 5, 7, 9, 11},
        {9, 11, 14, 16, 18, 20},
        {18, 20, 22, 24, 1, 3}
}

Referenced by __attribute__().

gsm0502_tch_h1_traffic_block_map

const uint8_t gsm0502_tch_h1_traffic_block_map[3][4]

static

Initial value:

= {
        {1, 3, 5, 7},
        {5, 7, 9, 11},
        {9, 11, 1, 3}
}

Referenced by __attribute__().

rn_table

const uint8_t rn_table[114]

static

Initial value:

= {
         48,  98,  63,   1,  36,  95,  78, 102,  94,  73,
          0,  64,  25,  81,  76,  59, 124,  23, 104, 100,
        101,  47, 118,  85,  18,  56,  96,  86,  54,   2,
         80,  34, 127,  13,   6,  89,  57, 103,  12,  74,
         55, 111,  75,  38, 109,  71, 112,  29,  11,  88,
         87,  19,   3,  68, 110,  26,  33,  31,   8,  45,
         82,  58,  40, 107,  32,   5, 106,  92,  62,  67,
         77, 108, 122,  37,  60,  66, 121,  42,  51, 126,
        117, 114,   4,  90,  43,  52,  53, 113, 120,  72,
         16,  49,   7,  79, 119,  61,  22,  84,   9,  97,
         91,  15,  21,  24,  46,  39,  93, 105,  65,  70,
        125,  99,  17, 123,
}

Referenced by gsm0502_hop_seq_gen().

tch_f_remap_table

struct fn_remap_table tch_f_remap_table

static

Referenced by __attribute__().

tch_h0_remap_table

struct fn_remap_table tch_h0_remap_table

static

Referenced by __attribute__().

tch_h1_remap_table

struct fn_remap_table tch_h1_remap_table

static

Referenced by __attribute__().