Packet processing relay agent to provide link layer forwarding in one-way cable/wireless/satellite modems
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United States of America Patent
Stats
-
Nov 19, 2002
Grant Date -
N/A
app pub date -
Oct 27, 1998
filing date -
Nov 10, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for allowing a personal computer to receive data from a computer network such as the Internet via a broadcast channel of a cable or satellite television network, while transmitting data upstream to the computer network via a telephone line. A packet processing relay agent (PPRA) forwards data at the data link layer between a one-way network adapter, such as a cable modem that receives Internet data via a cable network, and a two-way return path adapter, such as a telephone modem that communicates with Internet servers and other users via a telephone network. The system provides compatibility with TCP/IP routing/addressing conventions by forwarding upstream IP packets with a cable modem source address over the telephone modem. The PPRA can enhance functionality by incorporating higher layer functions at the data link layer.
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