Communication control method in complex switched network and gateway using the method

A method for controlling, with a gateway, communication in a complex network including packet-switched networks and a circuit switched network, the gateway having interfaces connecting the gateway to each of the packet-switched networks and is connected to the circuit switched network via at least one circuit, the method comprising:

• preparing a plurality of data communication methods, each of which is a combination of method items including a data transmission format, a communication path and a data compression ratio, where at least two of the communication paths correspond to different respective packet switched networks;
• preparing a parameter setting table for selecting one of parameters to be used for selecting an appropriate data communication method among the plurality of data communication methods;
• preparing a plurality of reference tables, each corresponding to a different parameter, and each comprising values of its respective parameter, where each value identifies one of the communication methods;
• and
• making the gateway to look up the parameter setting table and the reference table when receiving a calling signal, so as to select one of the communication methods;
• operating the gateway with the selected data communication method.

A method for controlling, with a gateway, communication in a complex network including packet-switched networks and a circuit switched network, the gateway having interfaces connecting the gateway to each of the packet-switched networks and is connected to the circuit switched network via at least one circuit, the method comprising:

• preparing a plurality of data communication methods, each of which is a combination of method items including a data transmission format, a communication path and a data compression ratio, where at least two of the communication paths correspond to different of the packet switched networks;
• preparing a parameter setting table for selecting one of parameters to be used for selecting an appropriate data communication method among the plurality of data communication methods;
• preparing a plurality of reference tables, each corresponding to a different parameter, and each comprising values of its respective parameter, where each value identifies one of the communication methods;
• and
• making the gateway to look up the parameter setting table and the reference table when receiving a calling signal, so as to select one of the communication methods;
• operating the gateway each method item of the data communication method.

A gateway connected to a packet-switched network and a circuit switched network so as to constitute a complex circuit network together with a circuit exchange, the gateway comprising:

• a packet-switched network control portion connected to the packet-switched network, including
• a storage data processing portion for enabling store and forward type data transmission,
• a plurality of data compression means having different compression ratios for enabling real time type data transmission,
• a plurality of circuit connection portions that can be connected to plural circuits, and
• a circuit switched network control portion connected to the circuit switched network;
• and
• a call control portion for controlling a call of communication together with the packet-switched network control portion and the circuit switched network control portion, and for monitoring traffic of the packet-switched network, wherein when receiving a calling signal the gateway looks up a prepared parameter setting table and a reference table for selecting the store and forward type or the real time data transmission, selecting a communication path that uses one of the circuit connection portions, and selecting one of the data compression means.