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authorAndreas Eversberg <andreas@eversberg.eu>2013-12-05 14:37:11 +0100
committerHolger Hans Peter Freyther <holger@moiji-mobile.com>2014-01-27 14:39:06 +0100
commitdcf38e1c9623f997d9b87c1a5868862581aa05cf (patch)
tree107d4b9f9122fe805df405158ff7524a7da95acd /openbsc/src/libtrau
parent88012b6e870d100e7d97b91f44897ce2d136d486 (diff)
Add function to update TRAU muxer after assignment or handover
E1 based BTS use TRAU muxer to decode TRAU frames. After changing channel from one timeslot to another (due to handover or assignment), the TRAU muxer must be updated. The call reference of the call is disconnected from the old channel and connected to the new channel.
Diffstat (limited to 'openbsc/src/libtrau')
-rw-r--r--openbsc/src/libtrau/trau_mux.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/openbsc/src/libtrau/trau_mux.c b/openbsc/src/libtrau/trau_mux.c
index c9d77cf..7b9bac0 100644
--- a/openbsc/src/libtrau/trau_mux.c
+++ b/openbsc/src/libtrau/trau_mux.c
@@ -31,6 +31,7 @@
#include <osmocom/core/talloc.h>
#include <openbsc/trau_upqueue.h>
#include <osmocom/core/crcgen.h>
+#include <openbsc/transaction.h>
/* this corresponds to the bit-lengths of the individual codec
* parameters as indicated in Table 1.1 of TS 06.10 */
@@ -518,3 +519,20 @@ int trau_send_frame(struct gsm_lchan *lchan, struct gsm_data_frame *frame)
return subchan_mux_enqueue(mx, dst_e1_ss->e1_ts_ss, trau_bits_out,
TRAU_FRAME_BITS);
}
+
+/* switch trau muxer to new lchan */
+int switch_trau_mux(struct gsm_lchan *old_lchan, struct gsm_lchan *new_lchan)
+{
+ struct gsm_network *net = old_lchan->ts->trx->bts->network;
+ struct gsm_trans *trans;
+
+ /* look up transaction with TCH frame receive enabled */
+ llist_for_each_entry(trans, &net->trans_list, entry) {
+ if (trans->conn && trans->conn->lchan == old_lchan && trans->tch_recv) {
+ /* switch */
+ trau_recv_lchan(new_lchan, trans->callref);
+ }
+ }
+
+ return 0;
+}