| 摘要 |
<p>In a telecommunication network a plurality of transmitting and receiving stations are provided at randomly distributed locations. Routing means are provided for routing of calls between stations in the network utilising other stations in the network for relaying of such calls where necessary. Each station S, 30-3, D incorporates a call routing control unit acting to select a further station to which a call is to be transmitted for the purpose of relaying the call and comprising a memory for compiling, for a plurality of possible destination stations D and from information received from further stations within the network within range of the transmitting station, information on possible further stations which may be suitable for relaying calls to the destination stations D. The control unit further comprises an interrogation arrangement for transmitting an interrogation signal to be received by at least one further station in the network, and an acknowledgement arrangement for transmitting an acknowledgement signal when the station is available for relaying a call in response to an interrogation signal received from a further station. Additionally the control unit includes a station selector for selecting a further station for relaying a call to a destination station D on the basis of receipt of an acknowledgement signal from a station judged by the control unit to be suitable for relaying the call to the destination station D using information held in its memory as a result of overhearing third party call routing attempts. The use of this method, in combination with direct and flood routing methods which are used if none of the selected stations are available for relaying, is capable of providing greatly improved performance and reliability in operation of such a network. The method is capable of finding a route between nodes if one exists with extremely high probability, and will do so quickly and with a very low information exchange requirement.</p> |
