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Wired data service compressing method

A technology of wired data and compression method, which is applied in the direction of TV, electrical components, transmission system, etc., and can solve the problem of limited header part and so on

Inactive Publication Date: 2008-02-20
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Method "E", used in today's DOCSIS / Euro-DOCSIS Version 1.1 and 2.0 data services, is a form of data compression, but it is limited to the header portion of a frame or packet (datagram), and does not attempt to or the larger payload portion of the packet to compress

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  • Wired data service compressing method
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[0012] For discussion reference, diagram 100 in FIG. 1, shows the protocol layers necessary to view a web page. In frame-based or packet-based networks, data compression can take two forms: header suppression / compression and payload compression. Frame-based and packet-based networks, such as Ethernet or DOCSIS / Euro-DOCSIS networks, have a physical layer interface (not shown in Figure 1), a data link layer (which includes a media access control (MAC) sublayer) (Figure 1 diagrams 103, 104 and 105 in Figure 1), the network layer (diagram 102 in Figure 1), the transport layer (diagram 101 in Figure 1), and the Open Systems Interconnection (Open Systems Interconnection) as specified in ITU-T X.200 Higher-level functions of the Interconnection, OSI) model. Communication objects in the data link layer are decomposed into "frames", while objects in the network layer are decomposed into "packets". In general, "frames" and "packets" consist of a header (header), a payload data unit (P...

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Abstract

A method for compression in cable data service includes the steps of providing data over protocol layers, and compressing at a data over cable service interface specification layer within the protocol layers. Compressing at the data over cable service interface specification layer includes compression at all layers of the protocol layers higher than the data over cable service interface specification layer.

Description

technical field [0001] The present invention mainly relates to data compression, in particular to a method for data compression of data services through a cable modem. Background technique [0002] Data Cable Services Interface Specification (DOCSIS)  ) and the European Cable Data Service Interface Specification (Euro-DOCSIS) define the interface standard for cable modems and their supporting instruments. Cable companies want the data throughput performance of their cable modems to rival that of DSL data traffic. ADSL data services provide 1.5-9Mbps downstream data flow and 16-640Kbps upstream data flow. VDSL can provide 13-52bps downstream data flow and 1.5-2.3Mbps upstream data flow. To meet the upstream speed requirements of its commercial customers, the wireline industry has recently updated the Data-over-Wireline Services Interface Specification (DOCSIS).  ). Now, the cable modem specification of the Data Cable Service Interface Specification / European Data Cable ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/16
CPCH04N7/17318H04L29/0604H04L69/04
Inventor 哈罗德·吉恩·罗伯茨
Owner THOMSON LICENSING SA