摘要:
The present invention relates to a system and an apparatus for synchronization between heterogeneous periodic clock domains, a synchronization failure detecting circuit, and a data receiving method. The synchronization system between heterogeneous periodic clock domains including a sender and a receiver operated according to heterogeneous periodic first clock and second clock, respectively, includes: a sender that outputs a prediction clock obtained by delaying the first clock for a first time; and a receiver that predicts success and failure of synchronization between the first clock and the second clock by using the prediction clock and selectively delays the second clock for a second time according to the predicted results to synchronize the second clock with the first clock.
摘要:
Disclosed are an asynchronous pipeline system, a stage, and a data transfer mechanism. The asynchronous pipeline system having a plurality of stages based on a 4-phase protocol, includes: a first stage among the plurality of stages; and a second stage among the plurality of stages connected next to the first stage, wherein the first stage transmits and the second receives bundled data and control data through an always bundled data channel and on-demand data through an on-demand data channel according to need of the second stage.
摘要:
A hardware apparatus for receiving a packet for a TCP offload engine (TOE), and receiving system and method using the same are provided. Specifically, information required to protocol processing by a processor is stored in the internal queue included in the packet receiving hardware. Data to be stored in a host memory is transmitted to the host memory after the data is stored in an external memory and protocol processing is performed by the processor. With these techniques, it is possible that a processor can operate asynchronously with a receiving time of a practical packet and it is possible to reduce an overhead that processor deals with unnecessary information
摘要:
An apparatus for preventing network attacks includes: a packet buffer for storing received packets from a network; a filtering unit for filtering harmful packets based on a result of comparison between information of the received packets and preset filtering information to select a first filtering target packet; an SYN cookie handler for selecting a second filtering target packet using an SYN cookie if it is determined that there is a TCP SYN flooding attack based on the information of the received packets after said filtering; and a session manager for selecting a third filtering target packet through session management if there is a TCP flag flooding attack based on the information of the received packets after said filtering. The apparatus further includes a packet transmission and receipt processing method and apparatus using above.
摘要:
A system on chip (SoC) including a memory management unit (MMU) and a memory address translation method thereof are provided. The SoC includes a master intellectual property (IP) configured to output a request corresponding to each of a plurality of working sets; an MMU module comprising a plurality of MMUs, each of which is allocated for one of the working sets and translates virtual addresses corresponding to the request into physical addresses; a first bus interconnect configured to connect the MMU module with a memory device and to transmit the request, on which address translation has been performed in at least one of the MMUs, to the memory device; and a second bus interconnect configured to connect the master IP with the MMU module and to allocate one of the MMUs for each of the working sets.
摘要:
An optical input/output (I/O) bus system for connecting a plurality of external devices with a central processing unit (CPU) or memory in a specific system using an optical signal is provided. The optical I/O bus system includes a serializer and deserializer (SerDes) connected with the CPU or memory, and configured to divide a serial electrical signal into parallel electrical signals or combine parallel electrical signals into a serial electrical signal, a photoelectric converter prepared between the SerDes and the external devices, and configured to convert the serial/parallel electrical signals into an optical signal or an optical signal into an electrical signal, a plurality of optical transmission means disposed in parallel to transfer the optical signal converted by the photoelectric converter, an optical switch prepared between the photoelectric converter and the optical transmission means, and configured to switch to one of the optical transmission means to transfer the optical signal converted by the photoelectric converter to the optical transmission means according to an address of the optical signal, and a plurality of optical slots connected to the respective optical transmission means to connect the external devices so that the optical signal is input/output. In the optical I/O bus system, a high-capacity signal can be transferred without distortion, interference, and bottleneck using optical connection technology.
摘要:
Provided is a method of controlling a rack power supply system and a rack power supply apparatus. The system includes a plurality of computing devices mounted in a rack, and a rack power supply apparatus supplying the plurality of computing devices with direct current (DC) power. The rack power supply apparatus includes a plurality of power generating units and a control unit. The plurality of power generating units are supplied with alternating current (AC) power to generate the DC power. The control unit controls to turn on or off each power generating unit in consideration of power consumption.
摘要:
An express interface apparatus using an optical connection is provided. The apparatus connects between a central processing unit (CPU) in a computer system and an external device supporting optical signal transfer using a peripheral component interconnect express (PCIE) supporting high-speed signal processing. The apparatus includes an optical connection module for connecting the external device so that an optical signal is input/output; an optical-to-electrical conversion module for converting the optical signal from the optical connection module into an electrical signal or converting an electrical signal into an optical signal; a signal processing module connected to the optical-to-electrical conversion module for performing signal processing to divide or merge the electrical signal; and a PCIE control module for controlling a processed signal from the signal processing module to deliver the signal to the CPU via a PCIE slot and controlling high-speed data transmitted and received between the CPU and the external device, such that a signal can be transmitted and received without a distortion or bottleneck phenomenon in high-speed data transfer.
摘要:
A hybrid power supply apparatus for data center includes: one or more power sources; and an uninterruptible rack level power supply unit supplied with an Alternating Current (AC) power from said one or more power sources, and configured to supply Direct Current (DC) power to a rack, the power supply unit supplying the DC power to the rack without interruption when supply of the power from said one or more power sources is stopped. The apparatus further includes a node provided in the rack and supplied with the DC power from the uninterruptible rack level power supply unit.
摘要:
A socket structure simultaneously supporting a Transmission Control Protocol/Internet Protocol (TCP/IP) offload engine and an Ethernet network interface card (NIC), the socket structure including: an NIC management module storing and managing pointer information with respect to a socket structure for supporting a Berkeley software distribution (BSD) socket interface; and a TCP/IP offload engine (TOE) management module storing and managing identification information with respect to a socket directly managed by TOE hardware.