Abstract: A communication method for using bandwidth efficiently in Internet protocol version 6 (IPv6) is provided to minimize use of header information that is added when the terminal is moved. According to the present invention, while maintaining compatibility between general terminals that conform to the mobile IPv6, bandwidth can be more efficiently used for terminals supporting functions defined in the present invention.

Abstract: Provided are an IP address lookup system and method for forwarding a packet over a data plane of a router. The IP address lookup system includes a forwarding table which has a three-layer table architecture so that it can search for each address group that constitutes an IP destination address of an input packet and a forwarding engine which obtains packet processing information and next hop information for the input packet by searching for the forwarding table using the IP destination address as a search key.

Abstract: An apparatus and a method for providing a QoS for a multi protocol label switching (MPLS) traffic are provided. According to the apparatus and the method, a label and an experimental (EXP) are extracted from an MPLS packet input to an MPLS network system, and then applied to a predetermined hash function to generate at least one hash value. Also, a QoS policy is applied to an MPLS session, and the MPLS packet is forwarded. Therefore, the QoS for transmitting the MPLS packet input to the MPLS network system can be ensured.

Abstract: Provided are a packet scheduling system and method capable of fair link resource distribution among a plurality of sessions requesting transmissions to an identical output link in input and output interfaces of a node in a high-speed packet exchange network such as an ATM network or the Internet. The packet scheduling system uses a traffic classifier which classifies traffic input from a plurality of input links, for each session; a central management unit which manages the agreed speed for each session and the virtual time of a system; a virtual finish time calculation unit which in response to the agreed speed and the system virtual time, calculates the virtual finish time of each packet for the traffic and attaches the calculated virtual finish time to the head of the packet as a time stamp.

Abstract: Provided are an IP address lookup system and method for forwarding a packet over a data plane of a router. The IP address lookup system includes a forwarding table which has a three-layer table architecture so that it can search for each address group that constitutes an IP destination address of an input packet and a forwarding engine which obtains packet processing information and next hop information for the input packet by searching for the forwarding table using the IP destination address as a search key.