Feature #1752 ยป 0001-RACH-decoding-Use-BER-threshold-for-RACH-ghost-detec.patch
| include/osmo-bts/gsm_data.h | ||
|---|---|---|
| 107 | 107 | |
| 108 | 108 |
float min_qual_rach; /* minimum quality for RACH bursts */ |
| 109 | 109 |
float min_qual_norm; /* minimum quality for normal daata */ |
| 110 |
uint16_t max_ber10k_rach; /* Maximum permitted RACH BER in 0.01% */ |
|
| 110 | 111 | |
| 111 | 112 |
struct {
|
| 112 | 113 |
char *sock_path; |
| src/common/bts.c | ||
|---|---|---|
| 118 | 118 |
btsb->t3105_ms = 300; |
| 119 | 119 |
btsb->min_qual_rach = MIN_QUAL_RACH; |
| 120 | 120 |
btsb->min_qual_norm = MIN_QUAL_NORM; |
| 121 |
btsb->max_ber10k_rach = 1707; /* 7 of 41 bits is Eb/N0 of 0 dB = 0.1707 */ |
|
| 121 | 122 |
btsb->pcu.sock_path = talloc_strdup(btsb, PCU_SOCK_DEFAULT); |
| 122 | 123 |
for (i = 0; i < ARRAY_SIZE(btsb->t200_ms); i++) |
| 123 | 124 |
btsb->t200_ms[i] = oml_default_t200_ms[i]; |
| src/common/l1sap.c | ||
|---|---|---|
| 936 | 936 | |
| 937 | 937 |
lc = &trx->ts[0].lchan[4].lapdm_ch; |
| 938 | 938 | |
| 939 |
/* check for RACH exceeding BER threshold (ghost RACH) */ |
|
| 940 |
if (rach_ind->ber10k > btsb->max_ber10k_rach) {
|
|
| 941 |
DEBUGP(DL1C, "ignoring RACH request: %u > %u (max BER)\n", |
|
| 942 |
rach_ind->ber10k, btsb->max_ber10k_rach); |
|
| 943 |
return 0; |
|
| 944 |
} |
|
| 945 | ||
| 939 | 946 |
/* check for under/overflow / sign */ |
| 940 | 947 |
if (!check_acc_delay(rach_ind, btsb, &acc_delay)) {
|
| 941 | 948 |
LOGP(DL1C, LOGL_INFO, "ignoring RACH request %u > max_ta(%u)\n", |
| src/common/vty.c | ||
|---|---|---|
| 304 | 304 |
VTY_NEWLINE); |
| 305 | 305 |
vty_out(vty, " min-qual-norm %.0f%s", btsb->min_qual_norm * 10.0f, |
| 306 | 306 |
VTY_NEWLINE); |
| 307 |
vty_out(vty, " max-ber10k-rach %u%s", btsb->max_ber10k_rach, |
|
| 308 |
VTY_NEWLINE); |
|
| 307 | 309 |
if (strcmp(btsb->pcu.sock_path, PCU_SOCK_DEFAULT)) |
| 308 | 310 |
vty_out(vty, " pcu-socket %s%s", btsb->pcu.sock_path, VTY_NEWLINE); |
| 309 | 311 | |
| ... | ... | |
| 603 | 605 |
return CMD_SUCCESS; |
| 604 | 606 |
} |
| 605 | 607 | |
| 608 |
DEFUN(cfg_bts_max_ber_rach, cfg_bts_max_ber_rach_cmd, |
|
| 609 |
"max-ber10k-rach <0-10000>", |
|
| 610 |
"Set the maximum BER for valid RACH requests\n" |
|
| 611 |
"BER in 1/10000 units (0=no BER; 100=1% BER)\n") |
|
| 612 |
{
|
|
| 613 |
struct gsm_bts *bts = vty->index; |
|
| 614 |
struct gsm_bts_role_bts *btsb = bts_role_bts(bts); |
|
| 615 | ||
| 616 |
btsb->max_ber10k_rach = strtoul(argv[0], NULL, 10); |
|
| 617 | ||
| 618 |
return CMD_SUCCESS; |
|
| 619 |
} |
|
| 620 | ||
| 606 | 621 |
DEFUN(cfg_bts_pcu_sock, cfg_bts_pcu_sock_cmd, |
| 607 | 622 |
"pcu-socket PATH", |
| 608 | 623 |
"Configure the PCU socket file/path name\n") |
| ... | ... | |
| 1093 | 1108 |
install_element(BTS_NODE, &cfg_bts_ul_power_target_cmd); |
| 1094 | 1109 |
install_element(BTS_NODE, &cfg_bts_min_qual_rach_cmd); |
| 1095 | 1110 |
install_element(BTS_NODE, &cfg_bts_min_qual_norm_cmd); |
| 1111 |
install_element(BTS_NODE, &cfg_bts_max_ber_rach_cmd); |
|
| 1096 | 1112 |
install_element(BTS_NODE, &cfg_bts_pcu_sock_cmd); |
| 1097 | 1113 | |
| 1098 | 1114 |
install_element(BTS_NODE, &cfg_trx_gsmtap_sapi_cmd); |
| src/osmo-bts-litecell15/l1_if.c | ||
|---|---|---|
| 964 | 964 |
l1sap->u.rach_ind.ra = ra; |
| 965 | 965 |
l1sap->u.rach_ind.acc_delay = acc_delay; |
| 966 | 966 |
l1sap->u.rach_ind.fn = fn; |
| 967 |
l1sap->u.rach_ind.ber10k = (uint16_t) (ra_ind->measParam.fBer * 100); |
|
| 967 | 968 |
if (!lchan || lchan->ts->pchan == GSM_PCHAN_CCCH || |
| 968 | 969 |
lchan->ts->pchan == GSM_PCHAN_CCCH_SDCCH4) |
| 969 | 970 |
l1sap->u.rach_ind.chan_nr = 0x88; |
| src/osmo-bts-octphy/l1_if.c | ||
|---|---|---|
| 1087 | 1087 |
l1sap->u.rach_ind.ra = ra; |
| 1088 | 1088 |
l1sap->u.rach_ind.acc_delay = acc_delay; |
| 1089 | 1089 |
l1sap->u.rach_ind.fn = fn; |
| 1090 |
l1sap->u.rach_ind.ber10k = (unsigned int) |
|
| 1091 |
(ra_ind->MeasuremenetInfo.usBERCnt * 100); |
|
| 1090 | 1092 |
if (!lchan || lchan->ts->pchan == GSM_PCHAN_CCCH || |
| 1091 | 1093 |
lchan->ts->pchan == GSM_PCHAN_CCCH_SDCCH4) |
| 1092 | 1094 |
l1sap->u.rach_ind.chan_nr = 0x88; |
| src/osmo-bts-sysmo/l1_if.c | ||
|---|---|---|
| 960 | 960 |
l1sap->u.rach_ind.ra = ra; |
| 961 | 961 |
l1sap->u.rach_ind.acc_delay = acc_delay; |
| 962 | 962 |
l1sap->u.rach_ind.fn = fn; |
| 963 |
l1sap->u.rach_ind.ber10k = (uint16_t) (ra_ind->measParam.fBer * 100); |
|
| 963 | 964 |
if (!lchan || lchan->ts->pchan == GSM_PCHAN_CCCH || |
| 964 | 965 |
lchan->ts->pchan == GSM_PCHAN_CCCH_SDCCH4) |
| 965 | 966 |
l1sap->u.rach_ind.chan_nr = 0x88; |
| src/osmo-bts-trx/gsm0503_coding.c | ||
|---|---|---|
| 1628 | 1628 |
return 0; |
| 1629 | 1629 |
} |
| 1630 | 1630 | |
| 1631 |
int rach_decode(uint8_t *ra, sbit_t *burst, uint8_t bsic) |
|
| 1631 |
int rach_decode(uint8_t *ra, sbit_t *burst, uint8_t bsic, |
|
| 1632 |
int *n_errors, int *n_bits_total) |
|
| 1632 | 1633 |
{
|
| 1633 | 1634 |
ubit_t conv[14]; |
| 1634 | 1635 |
int rv; |
| 1635 | 1636 | |
| 1636 |
osmo_conv_decode(&gsm0503_conv_rach, burst, conv); |
|
| 1637 |
osmo_conv_decode_ber(&gsm0503_conv_rach, burst, conv, |
|
| 1638 |
n_errors, n_bits_total); |
|
| 1637 | 1639 | |
| 1638 | 1640 |
rach_apply_bsic(conv, bsic); |
| 1639 | 1641 | |
| src/osmo-bts-trx/gsm0503_coding.h | ||
|---|---|---|
| 45 | 45 |
int tch_ahs_encode(ubit_t *bursts, uint8_t *tch_data, int len, |
| 46 | 46 |
int codec_mode_req, uint8_t *codec, int codecs, uint8_t ft, |
| 47 | 47 |
uint8_t cmr); |
| 48 |
int rach_decode(uint8_t *ra, sbit_t *burst, uint8_t bsic); |
|
| 48 |
int rach_decode(uint8_t *ra, sbit_t *burst, uint8_t bsic, |
|
| 49 |
int *n_errors, int *n_bits_total); |
|
| 49 | 50 |
int rach_encode(ubit_t *burst, uint8_t *ra, uint8_t bsic); |
| 50 | 51 |
int sch_decode(uint8_t *sb_info, sbit_t *burst); |
| 51 | 52 |
int sch_encode(ubit_t *burst, uint8_t *sb_info); |
| src/osmo-bts-trx/scheduler_trx.c | ||
|---|---|---|
| 703 | 703 |
} |
| 704 | 704 | |
| 705 | 705 | |
| 706 |
unsigned int compute_ber10k(int n_errors, int n_bits_total) |
|
| 707 |
{
|
|
| 708 |
float ber = n_bits_total == 0 ? 1.0 : |
|
| 709 |
(float)n_errors / (float)n_bits_total; |
|
| 710 |
return (int) (ber * 10000.0f); |
|
| 711 |
} |
|
| 706 | 712 |
/* |
| 707 | 713 |
* RX on uplink (indication to upper layer) |
| 708 | 714 |
*/ |
| ... | ... | |
| 714 | 720 |
uint8_t chan_nr; |
| 715 | 721 |
struct osmo_phsap_prim l1sap; |
| 716 | 722 |
uint8_t ra; |
| 723 |
int n_errors, n_bits_total; |
|
| 717 | 724 |
int rc; |
| 718 | 725 | |
| 719 | 726 |
chan_nr = trx_chan_desc[chan].chan_nr | tn; |
| ... | ... | |
| 722 | 729 |
trx_chan_desc[chan].name, fn, toa); |
| 723 | 730 | |
| 724 | 731 |
/* decode */ |
| 725 |
rc = rach_decode(&ra, bits + 8 + 41, l1t->trx->bts->bsic); |
|
| 732 |
rc = rach_decode(&ra, bits + 8 + 41, l1t->trx->bts->bsic, |
|
| 733 |
&n_errors, &n_bits_total); |
|
| 726 | 734 |
if (rc) {
|
| 727 | 735 |
LOGP(DL1C, LOGL_NOTICE, "Received bad AB frame at fn=%u " |
| 728 | 736 |
"(%u/51)\n", fn, fn % 51); |
| ... | ... | |
| 742 | 750 |
#endif |
| 743 | 751 |
l1sap.u.rach_ind.acc_delay = (toa >= 0) ? toa : 0; |
| 744 | 752 |
l1sap.u.rach_ind.fn = fn; |
| 753 |
l1sap.u.rach_ind.ber10k = compute_ber10k(n_errors, n_bits_total); |
|
| 745 | 754 | |
| 746 | 755 |
/* forward primitive */ |
| 747 | 756 |
l1sap_up(l1t->trx, &l1sap); |
