// Search FC containing valid BWC
while (bwControllable != null && bwControllable.getBandwidthConfigure() == null) {
bwControllable = bwControllable.getParentBWControllable();
}
if (bwControllable != null && bwControllable.getBandwidthConfigure() != null) {
IBandwidthConfigure bwc = bwControllable.getBandwidthConfigure();
if (bwc instanceof IConnectionBWConfig) {
maxStream = ((IConnectionBWConfig) bwc).getDownstreamBandwidth() / 8;
}
}
if (maxStream <= 0) {