IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0411727
(1999-10-01)
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발명자
/ 주소 |
- Hogberg, Shawn
- Davieau, Jerry
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출원인 / 주소 |
|
대리인 / 주소 |
Ingrassia Fisher & Lorenz
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인용정보 |
피인용 횟수 :
9 인용 특허 :
14 |
초록
▼
A method and apparatus are provided for managing the communications traffic load handled by one or more satellites (12, 120) within a satellite communications system (10) while staying within the capacity of on-board electrical power resources (90, 92, 94, FIG. 3). A forecast of the communications t
A method and apparatus are provided for managing the communications traffic load handled by one or more satellites (12, 120) within a satellite communications system (10) while staying within the capacity of on-board electrical power resources (90, 92, 94, FIG. 3). A forecast of the communications traffic load for a future time period is generated, using historical traffic data. Based in part upon the current onboard power capacity, predicted solar-charging conditions, and predicted traffic load, a forecast of the battery state of charge throughout the future time period is generated. If the forecast communications traffic load exceeds the forecast level of on-board power resources for the future time period, the method and apparatus undertake various remedial measures, including flow control, moving subscribers to low power channels, and terminating subscriber connections.
대표청구항
▼
A method and apparatus are provided for managing the communications traffic load handled by one or more satellites (12, 120) within a satellite communications system (10) while staying within the capacity of on-board electrical power resources (90, 92, 94, FIG. 3). A forecast of the communications t
A method and apparatus are provided for managing the communications traffic load handled by one or more satellites (12, 120) within a satellite communications system (10) while staying within the capacity of on-board electrical power resources (90, 92, 94, FIG. 3). A forecast of the communications traffic load for a future time period is generated, using historical traffic data. Based in part upon the current onboard power capacity, predicted solar-charging conditions, and predicted traffic load, a forecast of the battery state of charge throughout the future time period is generated. If the forecast communications traffic load exceeds the forecast level of on-board power resources for the future time period, the method and apparatus undertake various remedial measures, including flow control, moving subscribers to low power channels, and terminating subscriber connections. he first amount, wherein the update end position is a position on the information recording medium; (c) reading a first portion of the old digital information that has been recorded after the update end position; (d) recording the new digital information on the recording medium; and (e) recording the first portion of the old digital information following the new digital information recorded in operation (d). 6. The method according to claim 5, wherein the first portion of the old digital information corresponds to one error correction unit. 7. The method according to claim 5, wherein operation (d) comprises: (d1) recording the new digital information on the recording medium so that the recording of the new digital information terminates at the update end position of the information recording medium; and wherein operation (e) comprises: (e1) recording the first portion of the old digital information beginning at a position immediately following the update end position. 8. The method according to claim 6, wherein operation (c) comprises: (c1) performing error correction and decoding for the first portion of the old digital information to produce a corrected and decoded first portion of the old digital information; wherein operation (e) comprises: (e1) performing error correction and encoding for the corrected and decoded first portion of the old digital information to produce a corrected and encoded first portion of the old digital information; and (e2) recording the corrected and encoded first portion of the old digital information. 9. An information recording apparatus that replaces at least some old digital information, which has been recorded on an information recording medium, with new digital information, comprising: a controller that determines a first amount of the new digital information to be recorded on the information recording medium and that determines an update end position of the old digital information to be updated based on the first amount, wherein the update end position is a position on the information recording medium; and a recording and reproducing circuit that receives a read instruction from the controller, wherein the read instruction identifies the update end position and wherein the recording and reproducing circuit reads a first portion of the old digital information located after the update end position based on the read instruction, wherein the controller receives the first portion of the old digital information from the recording and reproducing circuit and subsequently outputs record data to the recording and reproducing circuit, wherein the record data corresponds to the first portion of the old digital information and the new digital information, and wherein the recording and reproducing circuit records the new digital information on the recording medium and records the first portion of the old digital information after a location at which the new digital information is recorded. 10. The apparatus according to claim 9, wherein the first portion of the old digital information corresponds to one error correction unit. 11. The apparatus according to claim 9, wherein the recording and reproducing circuit records the record data on the information recording medium so that the record data corresponding to the new digital information terminates at the update end position of the information recording medium, and wherein the recording and reproducing circuit records the record data on the information recording medium so that the record data corresponding to the first portion of the old digital information begins at a position immediately following the update end position. 12. The apparatus according to claim 10, wherein the controller performs error correction and decoding for the first portion of the old digital information to produce a corrected and decoded first portion of the old digital information, wherein the controller performs error correction an
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