IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0059113
(1998-04-13)
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발명자
/ 주소 |
- Kolze Thomas J.
- Anderson Steven E.
- Hou Victor T.
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| 출원인 / 주소 |
- General Instrument Corporation
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| 대리인 / 주소 |
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| 인용정보 |
피인용 횟수 :
131 인용 특허 :
9 |
초록
▼
Apparatus is provided for communicating data packets in variable length bursts over a physical layer in a multilayer data communication scheme. Each burst contains information data (40, 50, 60, 64, 74, 78, 82) and overhead (30, 32, 34, 36, 38, 42, 44, 62, 66, 76, 80, 84). The overhead includes forwa
Apparatus is provided for communicating data packets in variable length bursts over a physical layer in a multilayer data communication scheme. Each burst contains information data (40, 50, 60, 64, 74, 78, 82) and overhead (30, 32, 34, 36, 38, 42, 44, 62, 66, 76, 80, 84). The overhead includes forward error control (FEC) data (42, 62, 66, 76, 80, 84). Different burst modes (FIG. 2, 3, 4, 5) are provided to enable a trade-off to be made between bandwidth efficiency and data transmission robustness. The burst modes provide different combinations of modulation (such as QPSK and 16-QAM), symbol rates, FEC coding levels and frame and preamble structure. The apparatus is particularly suitable for use in upstream communications over hybrid fiber coax cable television plants.
대표청구항
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[ What is claimed is:] [1.]1. Apparatus for communicating data packets in variable length bursts over a physical layer in a multilayer data communication scheme, each burst containing (i) information data and (ii) overhead including forward error control (FEC) data, said apparatus comprising:a progr
[ What is claimed is:] [1.]1. Apparatus for communicating data packets in variable length bursts over a physical layer in a multilayer data communication scheme, each burst containing (i) information data and (ii) overhead including forward error control (FEC) data, said apparatus comprising:a programmable block processor for grouping said information data into blocks according to a selected one of a plurality of available grouping modes;a programmable FEC encoder for encoding said blocks with said FEC data according to a selected one of a plurality of possible coding levels; andan interface associated with said block processor and said FEC encoder for:selecting a burst mode that uses a particular grouping mode provided by said block processor and a particular coding level established by said FEC encoder to achieve an associated transmission bandwidth efficiency and burst transmission robustness over said physical layer for bursts containing said blocks.
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