Browsing by Author "Chien-Chao Tseng"

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NETWORK SYSTEM WITH SEAMLESS HANDOVER MECHANISM, OPERATION METHOD AND CONTROL APPARATUS THEREOF
(2018-07-05)
Chien-Chao Tseng
;
Chia-Lin Chuo
;
Ting-Hsuan Hsieh
A network system based on a SDN with a seamless handover mechanism, an operation method and a control apparatus thereof are provided. The network system includes network devices, host devices and a control apparatus. The network devices are connected together. A part of the network devices are equipped with wireless access networks of the same SSID, and each of the host devices is connected to one of the network devices. The control apparatus is connected to the network devices. When a first host device of the host devices is changed to connect with a second network device from a first network device, the control apparatus controls the network devices to return an address resolution response packet to the first host device in response to an address resolution request packet transmitted from the first host device, so as to maintain an IP address of the first host device.
STREAMING SERVICE SYSTEM, STREAMING SERVICE METHOD AND CONTROLLER THEREOF
(2017-06-29)
Ming-Hung Hsu
;
Chien-Chao Tseng
;
Min-Cheng Chan
;
Hsing-Liang Ku
;
Ming-Hao Chou
The disclosure provides a streaming service system, a streaming service method and a controller thereof The streaming service system includes a plurality of switch nodes, a plurality of surrogate servers, a content management apparatus and a controller. The switch nodes are connected, and the surrogate servers are respectively connected to one of the switch nodes. The controller is connected to the switch nodes and communicates with the content management apparatus. The content management apparatus provides server information of the surrogate servers to the controller. When a first client apparatus is joined to a streaming group, the content management apparatus informs the controller. Further, the controller selects a first surrogate server from the surrogate servers, and sets at least a portion of the switch nodes to adjust a multicast tree. The first surrogate server transmits streaming packets to the first client through a first transmission route of the multicast tree.