Electronics and Telecommunications Research Institute

Hwan-Jo Heo

Nam-Seok Ko

Jong-Dae Park

Sung-Kee Noh

Woo-Sug Jung

Byung-Ho Yae

Sung-Jin Moon

Soon-Seok Lee

Jung-Ho Myung

Tae-Soo Chung

The present invention relates to a network device that supports software defined networking (SDN) and a packet processing method in the network device. The network device in accordance with the present invention includes: a flow table configured to store a processing action for each flow; and a packet processing module configured to search the flow table for a flow entry matched with a packet being received to determine a list of processing actions for the packet. Here, the packet processing module is configured to use inheritance relationship information between flows defined in the flow table to generate an action list that includes one or more actions for the packet in order to determine the processing actions for the packet.

Flow inheritance

A method for sending and receiving a data through multiple communication paths and an apparatus for receiving a data through multiple communication paths. A method for receiving a data through multiple communication paths by an apparatus for receiving a data includes receiving at least t (here, 0&#x3c;t=n and n and t are natural numbers) of n shares generated from one unit data by a threshold encryption scheme by an apparatus for sending a data and sent through multiple communication paths on a network; and recovering the unit data using the at least t shares. According to exemplary embodiments of the present invention, data may be sent and received while ensuring confidentiality, integrity, and availability.

Method and apparatus for secure communication via multiple communication paths

Extension of a function of an Software defined networking (SDN) network device is provided. The network device includes a plurality of flow tables, a plurality of function modules configured to perform different processing on a packet, and an entry module configured to determine an operation to be performed first on the packet between a table search operation and a function module execution operation, in which as a result of the operation determined by the entry module, a table search operation or a function module execution operation to be performed next is designated, and the designation is repeated until an output instruction for the packet is given.

SDN-based network device with extended function and method of processing packet in the same device

A method of assuring QoS in consideration of fairness in a contention-based wireless network and a terminal for the same are provided. When a token is allocated by a wireless access point, the terminal determines priority of a data frame which the terminal intends to use in communication, through a scheme of splitting the allocated token. Therefore, fairness can be assured by selection of the terminal.

Method and apparatus for providing fairness-assured quality of service in contention-based wireless network

A packet scheduling method and apparatus which allows multiple flows that require data transmission to the same output port of a network device such as a router to fairly share bandwidth. The packet scheduling method includes calculating an expected time of arrival of a (k+1)-th packet subsequent to a currently input k-th packet of individual flows by use of bandwidth allocated fairly to each of the flows and a length of the k-th packet; in response to the arrival of the (k+1)-th packet, comparing the expected time of arrival of the (k+1)-th packet to an actual time of arrival of the (k+1)-th packet; and scheduling the (k+1)-th packet of each flow according to the comparison result.

Packet scheduling method and apparatus based on fair bandwidth allocation

A distributed packet processing apparatus capable of distributing packet load across a plurality of packet processing engines is provided. The distributed packet processing apparatus includes a plurality of processing engines each configured to process allocated packets, a first tag generating unit configured to allocate an input packet to a processing engine, which has a processing engine index corresponding to a tag index for the input packet, among the plurality of processing engines, a second tag generating unit configured to calculate a tag index for an output packet, and an index conversion unit configure to convert the tag index for the output packet to one processing engine index among a plurality of processing indexes for the plurality of the processing engines and allocates the output packet to a processing engine having the one processing engine index such that loads are distributed among the plurality of processing engines.

Apparatus and method for balancing load across multiple packet processing engines

A packet scheduling apparatus and method to fairly share network bandwidth between multiple subscribers and to fairly share the bandwidth allocated to each subscriber between multiple flows are provided. The packet scheduling method includes calculating first bandwidth for each subscriber to fairly share total bandwidth set for the transmission of packets between multiple subscribers; calculating second bandwidth for each flow to fairly share the first bandwidth between one or more flows that belong to each of the multiple subscribers; and scheduling a packet of each of the one or more flows based on the second bandwidth.

Growing community of inventors

Daejeon-si, South Korea

Hwan-Jo Heo