Packet communication method, node apparatus and packet communication system

A node apparatus used in a packet communication system that employs a packet having a transmission-source address and a destination address, each with predetermined address portions, comprising:

• an address converting part, which has a table of addresses of higher-rank stations of last repeating nodes for each respective terminal, and is configured to convert in said packet its own address in the predetermined address portion of the destination address of a received packet into an address of the higher-rank station of a last destination-side repeating node for a destination terminal;
• and
• a transferring part configured to transfer the packet.

A node apparatus used in a packet communication system that employs a packet having a transmission-source address and a destination address, each with predetermined address portions, comprising:

• an address converting part configured to convert an address of a higher-rank station in the transmission-source address of a received packet into its own address when the address of the higher-rank station in the transmission-source address of the received packet does not coincide with its own address, before being transferred through a transferring part;
• and
• said transferring part configured to transfer the received packet without changing the transmission-source address through said address converting part when the address of the higher-rank station in the transmission-source address of the received packet coincides with its own address.

A node apparatus used in a packet communication system that employs a packet having a transmission-source address and a destination address, each with predetermined address portions, comprising:

• an address converting part configured to convert an address of a higher-rank station of a predetermined portion of a destination address into an address of a higher-rank station of another destination that is identified in an instructed transfer, when the address of the higher-rank station in the predetermined portion of the destination address coincides with its own address and transfer instructions are given for the destination terminal, before being transferred through a transferring part;
• and
• said transferring part configured to transfer the received packet without changing the destination address through the address converting part, when the address of the higher-rank station in the destination address coincides with its own address and no transfer instructions are given for the destination terminal.

A node apparatus used in a packet communication system that employs a packet having a transmission-source address and a destination address, each with predetermined address portions, comprising:

• a determining part configured to determine whether an address of a higher-rank station in the destination address of a received packet does not coincide with an address of the node apparatus;
• and
• a transferring part configured to transfer the packet, when the address of the higher-rank station in the destination address of the received packet does not coincide with the address of the node apparatus as a result of the determination result of said determining part.

A node apparatus used in a packet communication system that employs a packet having a transmission-source address and a destination address, each with predetermined portions, comprising:

• an address converting part configured to convert addresses of higher-rank stations in transmission-source address and destination address of a received packet into predetermined addresses;
• and
• a transferring part configured to transfer the packet to the destination terminal.

A node apparatus used in a packet communication system that employs a packet having a transmission-source address and a destination address, each with predetermined portions, said node providing an interface between different networks, comprising:

• an address converting part configured to convert an address of a higher-rank station of a received packet into a predetermined address;
• and
• a transferring part configured to transfer the packet into another network.

A node apparatus used in a packet communication system that employs a packet having a transmission-source address and a destination address, said node providing an interface between different networks, comprising:

• an address converting part configured to convert a predetermined address in the destination address of a received packet into an address of a higher-rank station of a destination side last repeating node for a destination terminal of the packet;
• and
• a transferring part configured to transfer the packet.