IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0371803
(1999-08-10)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Bell, Robert P.Lin, StevenShaw, Steven
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인용정보 |
피인용 횟수 :
9 인용 특허 :
12 |
초록
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The present invention includes an intelligent router and method for improving the routing of datagrams, resulting in increased effective bandwidth over networks of high latency. The intelligent router can be used alone or in combination with a second intelligent router. An intelligent router buffers
The present invention includes an intelligent router and method for improving the routing of datagrams, resulting in increased effective bandwidth over networks of high latency. The intelligent router can be used alone or in combination with a second intelligent router. An intelligent router buffers data bound for a destination node within the router itself until the destination node has available space. In addition, the intelligent router of the present invention may continue to transmit a datagram without waiting for confirmation of receipt of a previous datagram. Also, retransmission requests can be ignored until a later time to accommodate for the delay in the network. When using multiple intelligent routers communicating with each other, only the erroneous portions of individual datagrams need to be resent. Routing between two intelligent routers eliminate or reduces the transmission of redundant data being sent.
대표청구항
▼
The present invention includes an intelligent router and method for improving the routing of datagrams, resulting in increased effective bandwidth over networks of high latency. The intelligent router can be used alone or in combination with a second intelligent router. An intelligent router buffers
The present invention includes an intelligent router and method for improving the routing of datagrams, resulting in increased effective bandwidth over networks of high latency. The intelligent router can be used alone or in combination with a second intelligent router. An intelligent router buffers data bound for a destination node within the router itself until the destination node has available space. In addition, the intelligent router of the present invention may continue to transmit a datagram without waiting for confirmation of receipt of a previous datagram. Also, retransmission requests can be ignored until a later time to accommodate for the delay in the network. When using multiple intelligent routers communicating with each other, only the erroneous portions of individual datagrams need to be resent. Routing between two intelligent routers eliminate or reduces the transmission of redundant data being sent. f said burst control signal is activated outside a core access period, said core access signal is generated when said burst control signal is activated, if said burst control signal is activated within the core access period, said core access signal is generated when said core access finishes. 2. The apparatus of claim 1, wherein the mode detection circuit comprises: a first input to receive the system clock signal; a second input to receive the buffered address control signal; and a latch circuit having a latch output that outputs the burst control signal. 3. The apparatus of claim 1, wherein the core access trigger circuit comprises: a receiver circuit that receives the burst control signal, an address detection signal and a core access indicator signal indicating the core access period; and an output circuit coupled to the receiver circuit that outputs the core access signal. 4. The apparatus of claim 3, wherein the output circuit of the core access trigger circuit further comprises a latch circuit coupled to the receiver circuit. 5. A method for setting a burst mode in a memory device, the method comprising steps of: receiving an address control signal to produce a buffered address control signal; producing a burst control signal from the buffered address control signal and a system clock, wherein the burst control signal generated if the system clock signal is activated during a time when the buffered address control signal is active; and generating a core access signal from the burst control signal, the core access signal is used to begin a next core access for burst mode operation of the memory, wherein if said burst control signal is activated outside a core access period, said core access signal is generated when said burst control signal is activated, if said curst control signal is activated within the core access period, said core access signal is generated when said core access finishes. 6. The method of claim 5, wherein the step of generating the core access signal is a step of generating the core access signal outside the first core access period. of claim 1, in which the predetermined distance corresponds to a fixed amount of data at the header density. 6. The optical disc of claim 1, in which the data area includes recorded data. 7. The optical disc of claim 6, in which the optical disc is of a read-only type. 8. A recorder comprising: a recording head; a recording controller for controlling the recording of data on an optical disc including a recording area having circular or spiral tracks divided into track portions, the track is provided with a servopattern including headers between the track portions, the track portions having periodic characteristics, the headers include position information encoded at a header density, and the recording is controlled depending on the position information; and a head positioner for positioning the recording head on a track at a position to be recorded; and means for detecting a phase-jump in the periodic characteristics at a predetermined distance before each header and for retrieving the position information from the headers depending on the detection. 9. The recorder of claim 8, in which the controller includes means for controlling the speed of recording depending on the periodic characteristics. 10. A reader, comprising: a read head; a read controller for controlling the reading of data from an optical disc including a recording area having circular or spiral tracks divided into track portions, the recording area having a servopattern including headers between the track portions, the track portions include periodic characteristics, the headers include position information encoded at a header density, the reading being controlled depending on the position information; and a head positioner for positioning the read head on a track at a position to be read controlled by the read controller; and means for detecting a jump in the phase of the periodic characteristics at a predetermined distance before each header, the reading of the position information from the headers depending on the phase jump detection. 11. The reader of claim 10, in which the read controller controls reading the data from an area of the track following an unrecorded area by adjusting the reading speed during scanning the unrecorded area depending on the periodic characteristics. 12. The reader of claim 10, in which the header detecting means are arranged for detecting the phase jump during scanning of an unrecorded area for retrieving data from an area of the track following the unrecorded area. ition above the phase shifter regions and transmission region. Due to this, cancellation is made between spread of near-field light due to incident light transmitted through the phase shifter region and spread of near-field light due to incident light transmitted through the transmission region, providing sharpness in an intensity distribution of near-field light over the data mark. Also, a phase shifter is provided at a through-hole of the near-field optical probe, enabling to produce more localized near-field light.
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