Communication system, communication device, and communication method

A communication device operable to communicate with a communication apparatus from among a plurality of communication apparatuses by obtaining an address of the communication apparatus, said communication device comprising:

• a first obtaining unit operable to obtain a set of identification information assigned to each user, and a respective address of each communication apparatus from each of the plurality of communication apparatuses;
• a registering unit operable to associate each address obtained by said first obtaining unit with a respective identification information obtained by said first obtaining unit and with a respective priority, and to register the associated address, identification information and priority into said registering unit;
• a second obtaining unit operable to obtain one of the set of identification information assigned to each user;
• and
• a specifying unit operable to
• search said registering unit for the identification information obtained by said second obtaining unit,
• specify one of the plurality of communication apparatuses as a target communication apparatus when the one of the plurality of communication apparatuses has the address registered in said registering unit which is associated with the identification information obtained by said second obtaining unit and when the identification information obtained by second obtaining unit is registered in said registering unit, and
• specify another one of the plurality of communication apparatuses as the target communication device when the another one of the plurality of communication apparatuses has an address which is registered in said registering unit with a highest priority and when the identification information obtained by said second obtaining unit is not registered in said registering unit.

A communication method used for a communication device included in a communication system, which comprises a plurality of communication devices which each communicate with another communication device from among the plurality of communication devices by obtaining an address of the other communication device, wherein a different address is assigned to each of the plurality of communication devices, and wherein said communication method comprises:

• a first obtaining operation of obtaining a set of identification information assigned to each user, and a respective address of each other communication device among the plurality of communications devices from each other communication device;
• a registering operation of associating each address obtained by said first obtaining operation with a respective identification information obtained by said first obtaining operation and with a respective priority, and registering the associated address, identification information and priority into a storing unit;
• a second obtaining operation of obtaining one of the set of identification information assigned to each user;
• and
• a specifying operation of
• searching the storing unit for the identification information obtained by said second obtaining operation,
• specifying one of the plurality of communication devices as a target communication device when the one of the plurality of communication devices has the address registered in the storing unit which is associated with the identification information obtained by said second obtaining operation and when the identification information obtained by second obtaining operation is registered in the storing unit, and
• specifying another one of the plurality of communication devices as the target communication device when the another one of the plurality of communication devices has an address which is registered in the storing unit with a highest priority and when the identification information obtained by said second obtaining operation is not registered in the storing unit.

A program for a communication device included in a communication system, which comprises a plurality of communication devices which each communicate with another communication device from among the plurality of communication devices by obtaining an address of the other communication device, wherein a different address is assigned to each of the plurality of communication devices, and wherein said communication method comprises:

• a first obtaining operation of obtaining a set of identification information assigned to each user, and a respective address of each other communication device among the plurality of communications devices from each other communication device;
• a registering operation of associating each address obtained by said first obtaining operation with a respective identification information obtained by said first obtaining operation and with a respective priority, and registering the associated address, identification information and priority into a storing unit;
• a second obtaining operation of obtaining one of the set of identification information assigned to each user;
• and
• a specifying operation of
• searching the storing unit for the identification information obtained by said second obtaining operation,
• specifying one of the plurality of communication devices as a target communication device when the one of the plurality of communication devices has the address registered in the storing unit which is associated with the identification information obtained by said second obtaining operation and when the identification information obtained by second obtaining operation is registered in the storing unit, and
• specifying another one of the plurality of communication devices as the target communication device when the another one of the plurality of communication devices has an address which is registered in the storing unit with a highest priority and when the identification information obtained by said second obtaining operation is not registered in the storing unit.