diff --git a/src/apps/relay/netengine.c b/src/apps/relay/netengine.c
index 64be86de..24d981a2 100644
--- a/src/apps/relay/netengine.c
+++ b/src/apps/relay/netengine.c
@@ -77,6 +77,32 @@ static void barrier_wait_func(const char* func, int line)
 
 #define barrier_wait() barrier_wait_func(__FUNCTION__,__LINE__)
 
+/////////////// Bandwidth //////////////////
+
+static pthread_mutex_t mutex_bps;
+
+static band_limit_t allocate_bps(band_limit_t bps)
+{
+	band_limit_t ret = 0;
+	if(bps>0) {
+		pthread_mutex_lock(&mutex_bps);
+
+		if(turn_params.bps_capacity_allocated < turn_params.bps_capacity) {
+			band_limit_t reserve = turn_params.bps_capacity - turn_params.bps_capacity_allocated;
+			if(reserve <= bps) {
+				ret = reserve;
+				turn_params.bps_capacity_allocated = turn_params.bps_capacity;
+			} else {
+				ret = bps;
+				turn_params.bps_capacity_allocated -= ret;
+			}
+		}
+
+		pthread_mutex_unlock(&mutex_bps);
+	}
+	return ret;
+}
+
 /////////////// AUX SERVERS ////////////////
 
 static void add_aux_server_list(const char *saddr, turn_server_addrs_list_t *list)
@@ -1382,7 +1408,7 @@ static void setup_relay_server(struct relay_server *rs, ioa_engine_handle e, int
 			 &turn_params.secure_stun, turn_params.shatype, &turn_params.mobility,
 			 turn_params.server_relay,
 			 send_turn_session_info,
-			 turn_params.max_bps);
+			 turn_params.max_bps, allocate_bps);
 	
 	if(to_set_rfc5780) {
 		set_rfc5780(&(rs->server), get_alt_addr, send_message_from_listener_to_client);
@@ -1527,6 +1553,8 @@ void setup_server(void)
 {
 	evthread_use_pthreads();
 
+	pthread_mutex_init(&mutex_bps, NULL);
+
 #if !defined(TURN_NO_THREAD_BARRIERS)
 
 	/* relay threads plus auth thread plus main listener thread */
diff --git a/src/server/ns_turn_server.c b/src/server/ns_turn_server.c
index 362c34fe..40398cd0 100644
--- a/src/server/ns_turn_server.c
+++ b/src/server/ns_turn_server.c
@@ -4349,7 +4349,7 @@ void init_turn_server(turn_turnserver* server,
 		send_socket_to_relay_cb send_socket_to_relay,
 		vintp secure_stun, SHATYPE shatype, vintp mobility, int server_relay,
 		send_turn_session_info_cb send_turn_session_info,
-		band_limit_t max_bps) {
+		band_limit_t max_bps, allocate_bps_cb allocate_bps_func) {
 
 	if (!server)
 		return;
@@ -4407,6 +4407,7 @@ void init_turn_server(turn_turnserver* server,
 	server->send_socket_to_relay = send_socket_to_relay;
 
 	server->max_bps = max_bps;
+	server->allocate_bps_func = allocate_bps_func;
 
 	set_ioa_timer(server->e, 1, 0, timer_timeout_handler, server, 1, "timer_timeout_handler");
 }
diff --git a/src/server/ns_turn_server.h b/src/server/ns_turn_server.h
index f55470fc..3a76ca39 100644
--- a/src/server/ns_turn_server.h
+++ b/src/server/ns_turn_server.h
@@ -92,7 +92,7 @@ typedef void (*release_allocation_quota_cb)(u08bits *username, u08bits *realm);
 typedef int (*send_socket_to_relay_cb)(turnserver_id id, u64bits cid, stun_tid *tid, ioa_socket_handle s, int message_integrity, MESSAGE_TO_RELAY_TYPE rmt, ioa_net_data *nd);
 typedef int (*send_turn_session_info_cb)(struct turn_session_info *tsi);
 
-typedef vint band_limit_t;
+typedef band_limit_t (*allocate_bps_cb)(band_limit_t bps);
 
 struct _turn_turnserver {
 
@@ -154,6 +154,7 @@ struct _turn_turnserver {
 
 	/* Bandwidth draft: */
 	band_limit_t max_bps;
+	allocate_bps_cb allocate_bps_func;
 };
 
 ///////////////////////////////////////////
@@ -188,7 +189,8 @@ void init_turn_server(turn_turnserver* server,
 				    vintp mobility,
 				    int server_relay,
 				    send_turn_session_info_cb send_turn_session_info,
-				    band_limit_t max_bps);
+				    band_limit_t max_bps,
+				    allocate_bps_cb allocate_bps_func);
 
 ioa_engine_handle turn_server_get_engine(turn_turnserver *s);
 
diff --git a/src/server/ns_turn_session.h b/src/server/ns_turn_session.h
index 86c6010e..cd9a8fcd 100644
--- a/src/server/ns_turn_session.h
+++ b/src/server/ns_turn_session.h
@@ -60,6 +60,7 @@ struct _realm_options_t {
 //////////////// session info //////////////////////
 
 typedef u64bits turnsession_id;
+typedef unsigned int band_limit_t;
 
 #define NONCE_MAX_SIZE (NONCE_LENGTH_32BITS*4+1)
 
@@ -103,6 +104,8 @@ struct _ts_ur_super_session {
   realm_options_t realm_options;
   int realm_set;
   s08bits origin[STUN_MAX_ORIGIN_SIZE + 1];
+  /* Bandwidth */
+  band_limit_t bps;
 };
 
 ////// Session info for statistics //////