IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0237617
(2002-09-10)
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우선권정보 |
JP-0370021 (2001-12-04) |
발명자
/ 주소 |
- Sugita, Yoichi
- Watanabe, Dai
- Yokosuka, Yasushi
- Chiba, Kiyoshi
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출원인 / 주소 |
|
대리인 / 주소 |
Dickstein Shapiro Morin & Oshinsky LLP
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인용정보 |
피인용 횟수 :
40 인용 특허 :
4 |
초록
▼
A train control method and apparatus for controlling the movement of trains with high safety by detecting trains on sections of track by an electronic blocking system. A wayside communication element (wayside transponder)5is placed in each block section on a track on which a train1runs. A cab commun
A train control method and apparatus for controlling the movement of trains with high safety by detecting trains on sections of track by an electronic blocking system. A wayside communication element (wayside transponder)5is placed in each block section on a track on which a train1runs. A cab communication element (cab transponder)3which can communicate with the wayside communication elements on the track is placed on the train1. When receiving a train identifier (ID) from a train, a wayside control device transmits the current position information and the stop position information to the train. The cab communication element of the train1receives the current position information and the stop position information, creates a protection speed pattern between the current train position and the stop position from the received information, and limits the speed of the train1by the protection speed pattern.
대표청구항
▼
A train control method and apparatus for controlling the movement of trains with high safety by detecting trains on sections of track by an electronic blocking system. A wayside communication element (wayside transponder)5is placed in each block section on a track on which a train1runs. A cab commun
A train control method and apparatus for controlling the movement of trains with high safety by detecting trains on sections of track by an electronic blocking system. A wayside communication element (wayside transponder)5is placed in each block section on a track on which a train1runs. A cab communication element (cab transponder)3which can communicate with the wayside communication elements on the track is placed on the train1. When receiving a train identifier (ID) from a train, a wayside control device transmits the current position information and the stop position information to the train. The cab communication element of the train1receives the current position information and the stop position information, creates a protection speed pattern between the current train position and the stop position from the received information, and limits the speed of the train1by the protection speed pattern. a is accessed and retrieved automatically upon initiation of a communication session, such as a voice call, initiated with a correspondent node. of measuring the receiving attenuation value and the receiving power of the base station in the full blossom state further comprising the steps of: rejecting the measured receiving attenuation value and the receiving power of the base station and providing the transceiver interfacing processor (TIP) with a re-measurement order if a new call is generated in the base station or if the measured receiving power of the base station is changed after setting the receiving attenuation value in the base station. 4. The method as claimed in claim 3, wherein the receiving attenuation value and the receiving power of the base station measured in the full blossom state are defined by the following equation:N i=Ni,front+Ai,inject×Ni,inject, wherein the N irepresents the noise power of the base station for an i-th receiving path; the Ni,frontrepresents the receiving power of a signal received at the base station before the receiving attenuation value is set at the base station; the Ni,injectrepresents the receiving power of the signal received at the base station after the receiving attenuation value is set at the base station; and, the Ai,injectrepresents the receiving attenuation value set in an i-th receiving path of the base station; and, wherein an average (N T1) of the noise power calculated in all receiving path for the noise power (Ni)of the i-th receiving path of the base station is determined as the noise power of the base station.5. The method as claimed in claim 4, wherein the receiving power Ni,frontof the signal received at the base station before the receiving attenuation value is set at the base station is defined as the following equation: wherein the A i,fullrepresents the receiving attenuation value and the Pi,fullrepresents the receiving power of the base station in a full blossom state; and, wherein the A i,partrepresents the receiving attenuation value and the Pi,partrepresents the receiving power Pi,partof the base station in a partial blossom state.6. The method as claimed in claim 5, wherein the receiving power Ni,injectof the signal received at the base station after the receiving attenuation value is set at the base station is defined as the following equation: wherein the A i,fullrepresents the receiving attenuation value and the Pi,fullrepresents the receiving power of the base station in a full blossom state; and, wherein the A i,partrepresents the receiving attenuation value and the Pi,partrepresents the receiving power Pi,partof the base station in a partial blossom state.7. The method as claimed in claim 6, wherein the total receiving power of the base station is defined as:P RX1=Ai,inject+Ai+PRSSI, wherein the P RX1represents the total receiving power of the base station; the Ai,injectrepresents the receiving attenuation value set in an i-th receiving path of the base station; the Airepresents a loss generated in the receiving path of the base station; and, the PRSSIrepresents the receiving power of the base station.8. The method as claimed in claim 1, wherein the step (2) of measuring the receiving attenuation value and the receiving power of the base station in the partial blossom state comprises the steps of: ordering a transceiver interfacing processor (TIP) of the base station to enter the partial blossom state; in response to the order to enter the partial blossom state, increasing the receiving attenuation value in the transceiver interfacing processor (TIP) at an increment to minimize interference with an adjacent base station, and entering the partial blossom state to receive a final attenuation value; upon receiving the final attenuation value, ordering the transceiver interfacing processor (TIP) to repeatedly measure the receiving power of the base station at specified times; receiving the measured receiving power values of the base station from the transceiver interfacing processor (TIP); and, calculating an average of the received receiving power values of the base station. 9. The method as claimed in claim 8, wherein the step of measuring the receiving attenuation value and the receiving power of the base station in the partial blossom state further comprising the steps of: rejecting the measured receiving attenuation value and the receiving power of the base station and providing the transceiver interfacing processor (TIP) with a re-measurement order if a new call is generated in the base station or if the measured receiving power of the base station is changed after setting the receiving attenuation value in the base station. 10. The method as claimed in claim 1, wherein the step (1) of calculating the noise power of the base station comprises the steps of: ordering the transceiver interfacing processor to repeatedly measure the receiving power of the base station at specified times if there is no call for a predetermined time in the base station;receiving the receiving power values from the transceiver interfacing processor (TIP); and,calculating an average of the receiving power values received from the transceiver interfacing processor (TIP).11. The method as claimed in claim 10, wherein the step (1) of calculating the noise power of the base station further comprising the steps of: rejecting the measured receiving attenuation value and the receiving power of the base station and providing the transceiver interfacing processor (TIP) with a re-measurement order if a new call is generated in the base station or if the measured receiving power of the base station is changed after setting the receiving attenuation value in the base station. 12. The method as claimed in claim 11, wherein the receiving power of the base station received when a call is incoming to the base station is determined as the total receiving power of the base station.13. The method as claimed in claim 11, wherein the cell loading factor of the base station is defined as: wherein the N Trepresents the noise power of the base station, and the PRXrepresents the total receiving power of the base station.14. The method as claimed in claim 13, wherein the step (e) of restricting an incoming call to the base station comprises the steps of: (1) determining whether the cell loading factor of the base station is lower than a first threshold value; (1) (i) if the cell loading factor of the base station is lower than the first threshold value, allowing both a new call and a handoff call; then, (1) (ii) if the cell loading factor of the base station is not lower than the first threshold; and, (2) determining whether the cell loading factor of the base station is lower than a second threshold value; (2)(i) if the cell loading factor of the base station is lower than the second threshold value, allowing the handoff call and restricting the new call; and, (2)(ii) if the cell loading factor of the base station is equal to or greater than the second threshold value, restricting both the new call and the handoff call. 15. The method as claimed in claim 14, the reverse call restriction is performed on a sub-cell unit basis.16. A method for restricting a reverse call in a base station, comprising the steps of: (a) calculating a noise power of the base station; (b) measuring a total receiving power of the base station; (c) calculating a cell loading factor of the base station using a ratio of the noise power to the total receiving power; (d) comparing the calculated cell loading factor of the base station with a predetermined threshold for call restriction; and, (e) restricting an incoming call to the base station according to the comparison result; wherein the cell loading factor of the base station is defined as: wherein the N Trepresents the noise power of the base station, and the PRXrepresents the total receiving power of the base station.17. The method as claimed in claim 16, wherein the step (e) of restricting an incoming call to the base station comprises the steps of: (1) determini ng whether the cell loading factor of the base station is lower than a first threshold value; (1) (i) if the cell loading factor of the base station is lower than the first threshold value, allowing both a new call and a handoff call; then, (1) (ii) if the cell loading factor of the base station is not lower than the first threshold; and, (2) determining whether the cell loading factor of the base station is lower than a second threshold value; (2)(i) if the cell loading factor of the base station is lower than the second threshold value, allowing the handoff call and restricting the new call; and, (2) (ii) if the cell loading factor of the base station is equal to or greater than the second threshold value, restricting both the new call and the handoff call. 18. The method as claimed in claim 17, the reverse call restriction is performed on a sub-cell unit basis.
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