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| author | Harald Welte <laforge@gnumonks.org> | 2016-06-27 18:56:01 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2018-02-27 17:27:46 +0100 |
| commit | b3a2a3e24f44adcc6660d33cc9684a8f24271e2e (patch) | |
| tree | cd0993648158ad2c050553a6e99dc72d21e4a95a /src/common/vty.c | |
| parent | c2b4c668f3510b7b0baace749c5a310959010e90 (diff) | |
RACH decoding: Use BER threshold for RACH ghost detection
When decoding RACH bursts, we should use a BER threshold in order to
help distinguish 'ghost' RACH bursts from real RACH bursts.
The theoretical ideal threshold according to some papers is 7 out of 41
bits qhich aquals to Eb/N0 of 0 dB = 0.1707 (17.07%)
We add a new 'ber10k' parameter to the RACH indication l1sap primitive
(needs separate change for libosmocore), and then fill this value from
osmo-bts-{sysmo,lc15,trx,octphy}. The common part above L1SAP then
applies the threshold, which can be changed from vty using the
"max-ber10k-rach <0-10000>"
command available at the BTS node. The unit is BER in 1/10000, i.e. a
value of 100 equals 1% bit error rate.
Change-Id: Ic41c11f6312a36baa2738547e8dcec80829457f8
Diffstat (limited to 'src/common/vty.c')
| -rw-r--r-- | src/common/vty.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/common/vty.c b/src/common/vty.c index a1cb2fec..3938de5b 100644 --- a/src/common/vty.c +++ b/src/common/vty.c @@ -291,6 +291,8 @@ static void config_write_bts_single(struct vty *vty, struct gsm_bts *bts) VTY_NEWLINE); vty_out(vty, " min-qual-norm %.0f%s", btsb->min_qual_norm * 10.0f, VTY_NEWLINE); + vty_out(vty, " max-ber10k-rach %u%s", btsb->max_ber10k_rach, + VTY_NEWLINE); if (strcmp(btsb->pcu.sock_path, PCU_SOCK_DEFAULT)) vty_out(vty, " pcu-socket %s%s", btsb->pcu.sock_path, VTY_NEWLINE); @@ -592,6 +594,19 @@ DEFUN(cfg_bts_min_qual_norm, cfg_bts_min_qual_norm_cmd, return CMD_SUCCESS; } +DEFUN(cfg_bts_max_ber_rach, cfg_bts_max_ber_rach_cmd, + "max-ber10k-rach <0-10000>", + "Set the maximum BER for valid RACH requests\n" + "BER in 1/10000 units (0=no BER; 100=1% BER)\n") +{ + struct gsm_bts *bts = vty->index; + struct gsm_bts_role_bts *btsb = bts_role_bts(bts); + + btsb->max_ber10k_rach = strtoul(argv[0], NULL, 10); + + return CMD_SUCCESS; +} + DEFUN(cfg_bts_pcu_sock, cfg_bts_pcu_sock_cmd, "pcu-socket PATH", "Configure the PCU socket file/path name\n") @@ -1542,6 +1557,7 @@ int bts_vty_init(struct gsm_bts *bts, const struct log_info *cat) install_element(BTS_NODE, &cfg_bts_ul_power_target_cmd); install_element(BTS_NODE, &cfg_bts_min_qual_rach_cmd); install_element(BTS_NODE, &cfg_bts_min_qual_norm_cmd); + install_element(BTS_NODE, &cfg_bts_max_ber_rach_cmd); install_element(BTS_NODE, &cfg_bts_pcu_sock_cmd); install_element(BTS_NODE, &cfg_trx_gsmtap_sapi_cmd); |