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As one type of the interconnected device between HVDC systems, the DC/AC/DC converter is able to achieve high-voltage connection and bulk-power transportation, which makes this device fit the interconnection of LCC-HVDCs. To achieve an efficient interconnected LCC-HVDC system, the DC/AC/DC converter is possible to operate under the condition that one LCC-HVDC runs at normal operation and the other...
In Software Defined Networks (SDN), more packet fields are included to design fine-grained policies. These policies are stored as entries in switch Flow Table. However, fine-grained policies cause the scalability issue as a single flow entry needs larger storage space and a significant number of flow entries need to be stored, but the Flow Table is limited due to the constraints of Ternary Content...
In Software Defined Networks (SDN), applications on the controller could enforce fine-grained control on flows by policies employing more packet fields. These policies are converted to flow entries and stored in switch Flow Table. To store these entries, Flow Table requires large storage space because an entry consisted of more packet fields needs more storage space and the number of entries also...
The stratospheric airships for telecommunication relay station and ground observations at 20km altitude has been widely used in recent years. Energy recycling system is one of key technologies for the stratospheric airship, which includes solar arrays, storage batteries and power control unit. Both of the battery charge regulator and the battery discharge regulator of power control unit are DC power...
Information-centric networking, ICN, is a promising technology for future Internet design, with which a user can directly obtain a content object by its name (or identification), without specifying the location of the content object. In recent years, various ICN architectures have been proposed, and they differ significantly in terms of naming, routing, etc. Consequently, it becomes a major challenge...
Transformation of PSTN to NGN is a challenging goal for many legacy telecom operators. A smooth migration for PSTN will be an evolutionary process. It is expected that a new generation PSTN can extend the range of new services. Chunghwa Telecom is currently initiating an NGN_CN development which is part of NGN project for PSTN migration. In this paper, the key network technologies for PSTN migration...
This paper presents a successive approach register (SAR) analog-to-digital converter (ADC) with a novel hybrid digital-to-analog converter (DAC) architecture: half junction splitting (J.S.) and half binary weighted capacitor DAC. This DAC maintains low power consumption of J.S. DAC and the high signal-to-noise plus distortion ratio (SNDR) of binary weighted capacitor DAC. The power dissipation of...
To solve the voltage control problem of the STATCOM, a PI control scheme based on multiple models is proposed in this paper. This control scheme combines the multiple models to the PI control. PI controller structure is applied, and the scheme has the advantage of simple structure, short calculate time and easy realization. Meanwhile, the method of multiple models is applied to meet the accuracy and...
A novel 150V-BCD technology by using 14um thick epitaxy based on 0.35um standard CMOS process has been developed for LCD backlighting application. In the whole process with 24 steps, HV circuit block, including VDNMOS and LDPMOS with double resurf principle, and LV block are integrated together. Advanced deep trench isolation (DTI) technology with the breakdown voltage above 150V is firstly in place...
Protective measures for server invasions should not solely focus on events before an invasion occur. Recording and monitoring successful server invasions with endless streams of security mechanisms should be employed attentively to reduce the loss of data due to successful intrusion attacks on any system. Overlooking this will inevitably lead to detrimental data loss and stray away from the key issue...
We propose a new optical hybrid switching solution that takes advantage of both Optical Burst Switching (OBS) and Optical Circuit Switching (OCS) technologies, namely, HyLABS (Hybrid Lightpath and Burst Switching). HyLABS uses static program optimized technology and dynamic switching between OCS and OBS, for network environment with uncertain and high bursty traffic demand. Our study shows that HyLABS...
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