3 files changed, 17 insertions, 5 deletions
diff --git a/openbsc/include/openbsc/chan_alloc.h b/openbsc/include/openbsc/chan_alloc.h
index 78242e5b7..0ba3f9669 100644
--- a/openbsc/include/openbsc/chan_alloc.h
+++ b/openbsc/include/openbsc/chan_alloc.h
@@ -37,17 +37,13 @@ void lchan_reset(struct gsm_lchan *lchan);
 /* Release the given lchan */
 int lchan_release(struct gsm_lchan *lchan, int sacch_deact, enum rsl_rel_mode release_mode);
 
-struct load_counter {
-	unsigned int total;
-	unsigned int used;
-};
-
 struct pchan_load {
 	struct load_counter pchan[_GSM_PCHAN_MAX];
 };
 
 void bts_chan_load(struct pchan_load *cl, const struct gsm_bts *bts);
 void network_chan_load(struct pchan_load *pl, struct gsm_network *net);
+void bts_update_t3122_chan_load(struct gsm_bts *bts);
 
 int trx_is_usable(struct gsm_bts_trx *trx);
 
diff --git a/openbsc/include/openbsc/gsm_data.h b/openbsc/include/openbsc/gsm_data.h
index 39c7458ca..b12c4edc3 100644
--- a/openbsc/include/openbsc/gsm_data.h
+++ b/openbsc/include/openbsc/gsm_data.h
@@ -372,6 +372,9 @@ struct gsm_network {
 	/* timer to expire old location updates */
 	struct osmo_timer_list subscr_expire_timer;
 
+	/* Timer for periodic channel load measurements to maintain each BTS's T3122. */
+	struct osmo_timer_list t3122_chan_load_timer;
+
 	/* Radio Resource Location Protocol (TS 04.31) */
 	struct {
 		enum rrlp_mode mode;
diff --git a/openbsc/include/openbsc/gsm_data_shared.h b/openbsc/include/openbsc/gsm_data_shared.h
index 30feedcab..a78e2eb7a 100644
--- a/openbsc/include/openbsc/gsm_data_shared.h
+++ b/openbsc/include/openbsc/gsm_data_shared.h
@@ -674,6 +674,12 @@ struct bts_location {
 	double height;
 };
 
+/* Channel load counter */
+struct load_counter {
+	unsigned int total;
+	unsigned int used;
+};
+
 /* One BTS */
 struct gsm_bts {
 	/* list header in net->bts_list */
@@ -901,6 +907,13 @@ struct gsm_bts {
 	char *pcu_sock_path;
 	struct pcu_sock_state *pcu_state;
 
+	/* BTS-specific overrides for timer values from struct gsm_network. */
+	uint8_t T3122;	/* ASSIGMENT REJECT wait indication */
+
+	/* Periodic channel load measurements are used to maintain T3122. */
+	struct load_counter chan_load_samples[7];
+	int chan_load_samples_idx;
+
 #endif /* ROLE_BSC */
 	void *role;
 };