Electronics and Telecommunications Research Institute

Korea Telecommunication Authority

Tae Soo Chung

Nam Seok Ko

Woo Sug Jung

Jong Dae Park

Byung Ho Yae

Sung Kee Noh

Hwan Jo Heo

Sung Jin Moon

Seung Hyun Yoon

Hyung Seok Chung

Jeong Sook Park

Taesang Choi

Byung Joon Lee

Chang Hoon Kim

Hyung Hwan Kim

Keol W Yu

The present invention provides content providing apparatus and method and a content providing system which maintains a compatibility with an IP network and deliver a content with a complete distributed architecture excluding the content synchronizing process and the request routing process which delivers the content.

Apparatus and method for providing content with a distributed architecture, and system for providing content with the said apparatus

Disclosed is a Quality of Service (QoS) providing method and apparatus in a software-defined networking (SDN) based network, the QoS providing method including receiving a first packet of a predetermined flow, searching for forwarding information corresponding to the packet and QoS rule information corresponding to the packet in a forwarding table and a QoS rule table, respectively, transmitting the packet to a controller if the forwarding information and the QoS rule information do not exist in the forwarding table and the QoS rule table, and generating a flow entry corresponding to the packet in a flow learning table based on forwarding information and QoS rule information that are received from the controller, thereby efficiently providing QoS.

Method for providing quality of service in software-defined networking based network and apparatus using the same

Provided is a flow generation method for Internet traffic measurement. In the flow generation method, dependency between packet collecting time and flow generating time is removed using a virtual timer and a flow generation completion processing interval is controlled to skip by a unit time in response to a user's request. Also, a fragmented packet processing method is selectively used at need and a FIN timeout is applied selectively to a timeout mechanism used in flow generation completion. Thereby, this invention can improve accuracy and efficiency of Internet traffic measurement.

Flow generation method for internet traffic measurement

The present invention relates to an output buffer type Asynchronous Transfer Mode(ATM) switch that enables decentralized processing, which simultaneously sends multiple inputted cells to each output line, and makes implementation easy by modularization, and without speed-up, could process high-speed data inputted/outputted through input/output lines by comprising: a Batcher Sorting Network arraying, in the order of output line group number, N(N=2.sup.1, 2.sup.2, . . . , 2.sup.n, n is natural numbers) cells simultaneously inputted through N input lines of the switch; an Expanded Banyan Routing Network outputting cells arrayed in said Batcher sorting Network to the corresponding output line group containing each output line; and an Output Queueing Modules temporarily storing cells, outputted from said Expanded Banyan Routing Network, in the buffer used as a common memory and sending these cells to the final output lines.

Output buffer type Asynchronous Transfer Mode(ATM) switch

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Daejeon, South Korea

Tae Soo Chung