1. A method for controlling routes in a network which is temporarily formed among a plurality of nodes, comprising the steps of: broadcasting a discovery demand of a destination node; receiving a first reply from said destination node with respect to the discovery demand; referring a joint count contained in the first reply and registering the joint count in a node which received the reply; adding 1 to the joint count if there is a plurality of nodes forming a plurality of links to which the reply is transferred, and transmitting the reply to each of the links; and selecting one of the links having a smaller registered joint count as a route if there is a plurality of links through which the data is transmitted to said destination node.