A packet processing relay agent to provide link layer...

Details A packet processing relay agent to provide link layer... A packet processing relay agent to provide link layer...

H - Electricity

04

L

H04L 12/12 (2006.01) H04L 12/28 (2006.01) H04L 29/08 (2006.01) H04N 7/03 (2006.01)

Patent

CA 2253109

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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