/* Scheduling the deliver of the frame to the idx neighbor, but before copy */
/* the frame. A sent frame changes owner, and without that we could only sent one */
copyFrame = op_pk_copy(currentFrame);
op_pk_deliver_delayed(copyFrame, remotePhysicalLayer, INPUT_STREAM_EXTERNAL_NODES, TXTIME (op_pk_total_size_get (currentFrame)) + reachableNeighbor->propagationDelay;
只有复制才能发送给多个节点, 因为执行op_pk_deliver_delayed之后,包的owner就改变了,因此必须重新构造一个副本