Add basic support for CBCH / SMS-CB (Cell Brroadcast)

We can now configure the pyisical channel types for CBCH either in the
CCCH+SDCCH4 or in the SDCCH8 chanel combination.

Depending on whether a CBCH exists on the BTS, we also generate the SI4
with matching CBCH channel description to notify the phones of the
existance of the CBCH.

There is now a VTY command how a SMS-CB message can be sent to a given
BTS.

We do not yet have any logic at all for actual scheduling of multiple
CBCH RSL messages towards one or multiple BTSs yet, though.

1 files changed, 10 insertions, 3 deletions

diff --git a/openbsc/src/libcommon/gsm_data_shared.c b/openbsc/src/libcommon/gsm_data_shared.c
index 8687a1047..210d2284b 100644
--- a/openbsc/src/libcommon/gsm_data_shared.c
+++ b/openbsc/src/libcommon/gsm_data_shared.c
@@ -51,7 +51,7 @@ static void gsm_mo_init(struct gsm_abis_mo *mo, struct gsm_bts *bts,
 	gsm_abis_mo_reset(mo);
 }
 
-const struct value_string gsm_pchant_names[10] = {
+const struct value_string gsm_pchant_names[12] = {
 	{ GSM_PCHAN_NONE,	"NONE" },
 	{ GSM_PCHAN_CCCH,	"CCCH" },
 	{ GSM_PCHAN_CCCH_SDCCH4,"CCCH+SDCCH4" },
@@ -61,10 +61,12 @@ const struct value_string gsm_pchant_names[10] = {
 	{ GSM_PCHAN_PDCH,	"PDCH" },
 	{ GSM_PCHAN_TCH_F_PDCH,	"TCH/F_PDCH" },
 	{ GSM_PCHAN_UNKNOWN,	"UNKNOWN" },
+	{ GSM_PCHAN_CCCH_SDCCH4_CBCH, "CCCH+SDCCH4+CBCH" },
+	{ GSM_PCHAN_SDCCH8_SACCH8C, "SDCCH8+CBCH" },
 	{ 0,			NULL }
 };
 
-const struct value_string gsm_pchant_descs[10] = {
+const struct value_string gsm_pchant_descs[12] = {
 	{ GSM_PCHAN_NONE,	"Physical Channel not configured" },
 	{ GSM_PCHAN_CCCH,	"FCCH + SCH + BCCH + CCCH (Comb. IV)" },
 	{ GSM_PCHAN_CCCH_SDCCH4,
@@ -75,6 +77,8 @@ const struct value_string gsm_pchant_descs[10] = {
 	{ GSM_PCHAN_PDCH,	"Packet Data Channel for GPRS/EDGE" },
 	{ GSM_PCHAN_TCH_F_PDCH,	"Dynamic TCH/F or GPRS PDCH" },
 	{ GSM_PCHAN_UNKNOWN,	"Unknown / Unsupported channel combination" },
+	{ GSM_PCHAN_CCCH_SDCCH4_CBCH, "FCCH + SCH + BCCH + CCCH + CBCH + 3 SDCCH + 2 SACCH (Comb. V)" },
+	{ GSM_PCHAN_SDCCH8_SACCH8C, "7 SDCCH + 4 SACCH + CBCH (Comb. VII)" },
 	{ 0,			NULL }
 };
 
@@ -88,12 +92,13 @@ enum gsm_phys_chan_config gsm_pchan_parse(const char *name)
 	return get_string_value(gsm_pchant_names, name);
 }
 
-const struct value_string gsm_lchant_names[6] = {
+const struct value_string gsm_lchant_names[8] = {
 	{ GSM_LCHAN_NONE,	"NONE" },
 	{ GSM_LCHAN_SDCCH,	"SDCCH" },
 	{ GSM_LCHAN_TCH_F,	"TCH/F" },
 	{ GSM_LCHAN_TCH_H,	"TCH/H" },
 	{ GSM_LCHAN_UNKNOWN,	"UNKNOWN" },
+	{ GSM_LCHAN_CBCH,	"CBCH" },
 	{ 0,			NULL }
 };
 
@@ -515,10 +520,12 @@ uint8_t gsm_ts2chan_nr(const struct gsm_bts_trx_ts *ts, uint8_t lchan_nr)
 		cbits += lchan_nr;
 		break;
 	case GSM_PCHAN_CCCH_SDCCH4:
+	case GSM_PCHAN_CCCH_SDCCH4_CBCH:
 		cbits = 0x04;
 		cbits += lchan_nr;
 		break;
 	case GSM_PCHAN_SDCCH8_SACCH8C:
+	case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
 		cbits = 0x08;
 		cbits += lchan_nr;
 		break;