Packet ring network system, method of connecting packet rings, and inter-ring connecting node

A packet ring network system in which each packet ring includes a plurality of inter-ring connecting nodes connecting with another packet ring, and each of the plurality of inter-ring connecting nodes in one packet ring is connected with each of a plurality of inter-ring connecting nodes in another packet ring one to one so that the packet rings are connected with each other, each of the inter-ring connecting nodes provided in each packet ring comprising:

• a packet transfer unit that, when a packet or a broadcast packet in which an address of the inter-ring connecting node is set as a destination address is transferred from a packet ring, transfers a packet encapsulated in the packet or the broadcast packet to another packet ring;
• an address falsifying unit that sets an address of another inter-ring connecting node provided in the same packet ring as a source address of the broadcast packet to be transmitted to the packet ring;
• an arrival point setting unit that sets a predetermined arrival point with respect to the broadcast packet to be transmitted to the packet ring;
• and
• a bidirectional broadcast packet transmitting unit that transmits the broadcast packet, in which the address of the other inter-ring connecting node is set as the source address by the address falsifying unit and the arrival point is set by the arrival point setting unit, in a direction of the other inter-ring connecting node and a direction opposite thereto, respectively.

A packet ring network system in which each packet ring includes a plurality of inter-ring connecting nodes connecting with another packet ring, and each of the plurality of inter-ring connecting nodes in one packet ring is connected with each of a plurality of inter-ring connecting nodes in another packet ring one to one so that the packet rings are connected with each other, each of the inter-ring connecting nodes provided in each packet ring comprising:

• a packet transfer unit that, when a packet or a broadcast packet in which an address of the inter-ring connecting node is set as a destination address is transferred from a packet ring, transfers a packet encapsulated in the packet or the broadcast packet to another packet ring;
• a source address setting unit that sets an address of the inter-ring connecting node as a source address of the packet to be transmitted to the packet ring;
• an arrival point setting unit that sets a predetermined arrival point with respect to the broadcast packet transmitted to the packet ring;
• a bidirectional broadcast packet transmitting unit that transmits the broadcast packet in which the address of the inter-ring connecting node is set as the source address by the source address setting unit and the arrival point is set by the arrival point setting unit in a direction of another inter-ring connecting node provided in the same packet ring and a direction opposite thereto, respectively;
• and
• a packet elimination unit that, when the source address of the broadcast packet transferred from the packet ring is an address of the other inter-ring connecting node, eliminates the broadcast packet from the ring.

A packet ring network system in which each packet ring includes a plurality of inter-ring connecting nodes connecting with another packet ring, and each of the plurality of inter-ring connecting nodes in one packet ring is connected with each of a plurality of inter-ring connecting nodes in another packet ring one to one so that the packet rings are connected with each other, each of the inter-ring connecting nodes provided in each packet ring comprising:

• a packet transfer means that, when a packet or a broadcast packet in which an address of the inter-ring connecting node is set as a destination address is transferred from a packet ring, transfers a packet encapsulated in the packet or the broadcast packet to another packet ring;
• an address falsifying means that sets an address of another inter-ring connecting node provided in the same packet ring as a source address of the broadcast packet to be transmitted to the packet ring;
• an arrival point setting means that sets a predetermined arrival point with respect to the broadcast packet to be transmitted to the packet ring;
• and
• a bidirectional broadcast packet transmitting means that transmits the broadcast packet, in which the address of the other inter-ring connecting node is set as the source address by the address falsifying means and the arrival point is set by the arrival point setting means, in a direction of the other inter-ring connecting node and a direction opposite thereto, respectively.

A packet ring network system in which each packet ring includes a plurality of inter-ring connecting nodes connecting with another packet ring, and each of the plurality of inter-ring connecting nodes in one packet ring is connected with each of a plurality of inter-ring connecting nodes in another packet ring one to one so that the packet rings are connected with each other, each of the inter-ring connecting nodes provided in each packet ring comprising:

• a packet transfer means that, when a packet or a broadcast packet in which an address of the inter-ring connecting node is set as a destination address is transferred from a packet ring, transfers a packet encapsulated in the packet or the broadcast packet to another packet ring;
• a source address setting means that sets an address of the inter-ring connecting node as a source address of the packet to be transmitted to the packet ring;
• an arrival point setting means that sets a predetermined arrival point with respect to the broadcast packet transmitted to the packet ring;
• a bidirectional broadcast packet transmitting means that transmits the broadcast packet, in which the address of the inter-ring connecting node is set as the source address by the source address setting means and the arrival point is set by the arrival point setting means, in a direction of another inter-ring connecting node provided in the same packet ring and a direction opposite thereto, respectively;
• and
• a packet elimination means that, when the source address of the broadcast packet transferred from the packet ring is an address of the other inter-ring connecting node, eliminates the broadcast packet from the ring.

A packet transfer method applied to a packet ring network system in which each packet ring includes a plurality of inter-ring connecting nodes connecting with another packet ring, and each of the plurality of inter-ring connecting nodes in one packet ring is connected with each of a plurality of inter-ring connecting nodes in another packet ring one to one so that the packet rings are connected with each other, the method comprising, by each of the inter-ring connecting nodes provided in each packet ring:

• transferring, when a packet or a broadcast packet in which an address of the inter-ring connecting node is set as a destination address is transferred from a packet ring, a packet encapsulated in the packet or the broadcast packet to another packet ring;
• setting an address of another inter-ring connecting node provided in the same packet ring as a source address of the broadcast packet to be transmitted to the packet ring;
• setting a predetermined arrival point with respect to the broadcast packet to be transmitted to the packet ring;
• and
• transmitting the broadcast packet, in which the address of the other inter-ring connecting node is set as the source address and the arrival point is set, in a direction of the other inter-ring connecting node and a direction opposite thereto, respectively.

A packet transfer method applied to a packet ring network system in which each packet ring includes a plurality of inter-ring connecting nodes connecting with another packet ring, and each of the plurality of inter-ring connecting nodes in one packet ring is connected with each of a plurality of inter-ring connecting nodes in another packet ring one to one so that the packet rings are connected with each other, the method comprising, by each of the inter-ring connecting nodes provided in each packet ring:

• transferring, when a packet or a broadcast packet in which an address of the inter-ring connecting node is set as a destination address is transferred from a packet ring, a packet encapsulated in the packet or the broadcast packet to another packet ring;
• setting an address of the inter-ring connecting node as a source address of the packet to be transmitted to the packet ring;
• setting a predetermined arrival point with respect to the broadcast packet to be transmitted to the packet ring;
• transmitting the broadcast packet, in which the address of the inter-ring connecting node is set as the source address and the arrival point is set, in a direction of another inter-ring connecting node provided in the same packet ring and a direction opposite thereto, respectively;
• and
• if the source address of the broadcast packet transferred from the packet ring is the address of the other inter-ring connecting node, eliminating the broadcast packet from the ring.

An inter-ring connecting node applied to a packet ring network system in which each packet ring includes a plurality of inter-ring connecting nodes connecting with another packet ring, and each of the plurality of inter-ring connecting nodes in one packet ring is connected with each of a plurality of inter-ring connecting nodes in another packet ring one to one so that the packet rings are connected with each other, the node comprising:

• a packet transfer unit that, when a packet or a broadcast packet in which an address of the inter-ring connecting node is set as a destination address is transferred from a packet ring, transfers a packet encapsulated in the packet or in the broadcast packet to another packet ring;
• an address falsifying unit that sets an address of another inter-ring connecting node provided in the same packet ring as a source address of the broadcast packet transmitted to the packet ring;
• an arrival point setting unit that sets a predetermined arrival point with respect to the broadcast packet transmitted to the packet ring;
• and
• a bidirectional broadcast packet transmitting unit that transmits the broadcast packet, in which the address of the other inter-ring connecting node is set as the source address by the address falsifying unit and the arrival point is set by the arrival point setting unit, in a direction of the other inter-ring connecting node and a direction opposite thereto, respectively.

An inter-ring connecting node applied to a packet ring network system in which each packet ring includes a plurality of inter-ring connecting nodes connecting with another packet ring, and each of the plurality of inter-ring connecting nodes in one packet ring is connected with each of a plurality of inter-ring connecting nodes in another packet ring one to one so that the packet rings are connected with each other, the node comprising:

• a packet transfer unit that, when a packet or a broadcast packet in which an address of the inter-ring connecting node is set as a destination address is transferred from a packet ring, transfers a packet encapsulated in the packet or in the broadcast packet to another packet ring;
• a source address setting unit that sets an address of the inter-ring connecting node as a source address of a packet to be transmitted to the packet ring;
• an arrival point setting unit that sets a predetermined arrival point with respect to the broadcast packet to be transmitted to the packet ring;
• a bidirectional broadcast packet transmitting unit that transmits the broadcast packet, in which the address of the inter-ring connecting node is set as the source address by the source address setting unit and the arrival point is set by the arrival point setting unit, in a direction of another inter-ring connecting node provided in the same packet ring and a direction opposite thereto, respectively;
• and
• a packet elimination unit that, when the source address of the broadcast packet transferred from the packet ring is an address of the other inter-ring connecting node, eliminates the broadcast packet from the ring.

An inter-ring connecting node applied to a packet ring network system in which each packet ring includes a plurality of inter-ring connecting nodes connecting with another packet ring, and each of the plurality of inter-ring connecting nodes in one packet ring is connected with each of a plurality of inter-ring connecting nodes in another packet ring one to one so that the packet rings are connected with each other, the node comprising:

• a packet transfer means that, when a packet or a broadcast packet in which an address of the inter-ring connecting node is set as a destination address is transferred from a packet ring, transfers a packet encapsulated in the packet or in the broadcast packet to another packet ring;
• an address falsifying means that sets an address of another inter-ring connecting node provided in the same packet ring as a source address of the broadcast packet transmitted to the packet ring;
• an arrival point setting means that sets a predetermined arrival point with respect to the broadcast packet transmitted to the packet ring;
• and
• a bidirectional broadcast packet transmitting means that transmits the broadcast packet, in which the address of the other inter-ring connecting node is set as the source address by the address falsifying means and the arrival point is set by the arrival point setting means, in a direction of the other inter-ring connecting node and a direction opposite thereto, respectively.

An inter-ring connecting node applied to a packet ring network system in which each packet ring includes a plurality of inter-ring connecting nodes connecting with another packet ring, and each of the plurality of inter-ring connecting nodes in one packet ring is connected with each of a plurality of inter-ring connecting nodes in another packet ring one to one so that the packet rings are connected with each other, the node comprising:

• a packet transfer means that, when a packet or a broadcast packet in which an address of the inter-ring connecting node is set as a destination address is transferred from a packet ring, transfers a packet encapsulated in the packet or in the broadcast packet to another packet ring;
• a source address setting means that sets an address of the inter-ring connecting node as a source address of a packet to be transmitted to the packet ring;
• an arrival point setting means that sets a predetermined arrival point with respect to the broadcast packet to be transmitted to the packet ring;
• a bidirectional broadcast packet transmitting means that transmits the broadcast packet, in which the address of the inter-ring connecting node is set as the source address by the source address setting means and the arrival point is set by the arrival point setting means, in a direction of another inter-ring connecting node provided in the same packet ring and a direction opposite thereto, respectively;
• and
• a packet elimination means that, when the source address of the broadcast packet transferred from the packet ring is an address of the other inter-ring connecting node, eliminates the broadcast packet from the ring.