Network router apparatus and method

• US 7,590,144 B1
• Filed: 05/11/2004
• Issued: 09/15/2009
• Est. Priority Date: 05/13/2003
• Status: Active Grant

• Current Assignee: Advanced Digital Broadcast SA (Advanced Digital Broadcast Holdings SA)
• Original Assignee: Advanced Digital Broadcast Holdings SA
• Inventors: Ladd, Patrick
• Primary Examiner(s): Ngo, Ricky
• Assistant Examiner(s): Yuen, Kan
• Application Number:
  US10/843,887
• Time in Patent Office: 1,953 Days
• Field of Search: 370/389, 370/392, 370/401, 370/466, 370/471
• US Class Current: 370/466
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04L 12/2834 Switching of information between an external network and a home network access arrangements H04L12/2856
• CPC Class Codes: H04L 12/2861 Point-to-multipoint connection from the data network to the subscribers
• CPC Class Codes: H04L 12/2898 Subscriber equipments DSL modems H04M11/062; cable modems H04L12/2801
• CPC Class Codes: H04L 61/2517 using port numbers
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols

Abstract

An improved network router apparatus and associated network architecture is disclosed. In one exemplary embodiment, the router apparatus is adapted to interface between an external network (such as an HFC/DOCSIS digital network) and a local network created using existing HFC cabling within a premises. The router device provides address translation between the single IP address assigned to the router by the external network and the addresses of the individual nodes or access points on the local network through creation of logical ports assigned to various portions of the available bandwidth of the cable system. The router further distinguishes network protocols from the media content streamed over the HFC network, allowing for the foregoing functionality and replacing any existing cable modem. Methods of initiating the router and assigning addresses are also disclosed, as well as business models for leasing the router equipment and access points.

Claims

1. A premises network router apparatus adapted for use in a cable network, comprising:

a first signal interface adapted to communicate with an external cable network, said first interface having a first protocol stack adapted to receive signals from an entity coupled to said external cable network according to a first protocol, and to extract a first portion of said signals which are encoded according to an internet protocol;

a second signal interface having a second protocol stack, said second interface being adapted to communicate with a local coaxial cable network having a computerized device coupled thereto, and transfer said portion of said signals to said computerized device, said computerized device being able to communicate via said internet protocol; and

an address translator adapted to translate a first address associated with said router apparatus on said external cable network to a second address associated with said local coaxial cable network, said second address being used to deliver said portion of signals to said computerized device;

wherein said router apparatus is further adapted to deliver a second portion of said signals not encoded according to said internet protocol to apparatus operatively coupled to said local coaxial cable network; and

wherein said apparatus is configured to boot up in a sequence comprising;

booting up said second signal interface first;

generating a downstream transmission channel;

connecting to at least one access point;

assigning an address to said at least one access point; and

booting up said first signal interface, said first signal interface designed to loop continually seeking a signal on said external cable network; and

if signal is found on said external cable network, then acquiring an address, and

if no signal is found on said external cable network, then acquiring an address from a user via an on-screen display.

2. The apparatus of claim 1, wherein said external network comprises an HFC cable network, and said local coaxial cable network comprises existing coaxial cabling installed within a user premises.

3. The apparatus of claim 1, wherein said signals from said entity coupled to said external network according to said first protocol comprise MPEG-encoded signals.

4. The apparatus of claim 1, wherein said translation comprises allocating addresses to a plurality of logical ports associated with said local coaxial cable network.

5. A premises network router apparatus adapted for use in a content-based network, comprising:

a first signal interface adapted to communicate with an external network, said first interface having a first protocol stack adapted to receive signals from an entity coupled to said external network according to a first protocol, and to extract a first portion of said signals which are encoded according to an internetworking protocol;

a second signal interface having a second protocol stack, said second interface being adapted to communicate with a local coaxial cable network having a computerized device coupled thereto, and transfer said portion of said signals to said computerized device, said computerized device being able to communicate via said internetworking protocol; and

an address translator adapted to translate a first address associated with said router apparatus on said external network to a second address associated with said local coaxial cable network, said second address being used to deliver said portion of signals to said computerized device;

wherein said router apparatus is further adapted to deliver a second portion of said signals not encoded according to said internetworking protocol to apparatus operatively coupled to said local coaxial cable network; and

wherein said apparatus is configured to initiate according to the method comprising;

initiating said second signal interface first;

generating a downstream transmission channel;

connecting to at least one access point;

assigning an address to said at least one access point; and

initiating said first signal interface, said first signal interface configured to continually seek a signal on said external network; and

if signal is found on said external network, then acquiring an address, or

if no signal is found on said external network, then acquiring an address from another source.

6. The apparatus of claim 5, wherein said local coaxial cable network comprises coaxial cabling installed within a user premises.

7. The apparatus of claim 5, wherein said external network comprises an HFC cable network.

8. The apparatus of claim 5, wherein said external network comprises a satellite network.

9. The apparatus of claim 5, wherein said internet protocol comprises the Internet Protocol (IP).

10. The apparatus of claim 5, wherein said internet protocol comprises at least one of:

the RTP protocol;

the RTCP protocol;

or

the Session Initiation Protocol (SIP).

11. A premises network device adapted to interface between an external content-based network and a premises network having a plurality of computerized devices coupled thereto, said premises network device comprising:

a first interface having a first protocol stack and adapted to;

seek signals from an external network;

receive signals from said external network according to a first protocol; and

evaluate received signals and extract a first portion of said signals encoded according to an internet protocol;

a second interface having a second protocol stack and adapted to;

transfer said first portion of said signals directly to a first set of said plurality of computerized devices, said first set adapted to communicate via said internet protocol; and

transfer a second portion of said signals to a second set of said plurality of computerized devices, said second signals not encoded according to said internet protocol;

an apparatus adapted to translate an address associated with said premises network device on said external network to at least one address associated with said premises network;

wherein said premises network device is further adapted to;

initiate said second interface first;

generate a downstream transmission channel;

connect to at least one access point, said access point being assigned an address;

initiate said first interface, and

acquire an address if a signal is received from said external network, or from another source if no signal is received from said external network; and

wherein said transfer of said first and second portions of said signals to said first and second sets of said plurality of computerized devices comprises utilizing said at least one address associated with said premises network.

12. The premises network device of claim 11, wherein said external content-based network comprises an HFC cable network, and said premises network comprises coaxial cabling installed within a user premises.

13. The premises network device of claim 12, wherein said act of transferring said first and said second portions of said signals to said first and second sets of said plurality of computerized devices comprises utilizing unused bandwidth of said coaxial cabling installed within said user premises.

14. The premises network device of claim 11, wherein said first portion of said signals transferred directly to said first ones of said plurality of computerized devices comprise MPEG-encoded signals.

15. The premises network device of claim 11, wherein said apparatus adapted to translate provides said translation according to an RSIP protocol.

16. A premises network apparatus adapted for use in a cable network, comprising:

a first interface adapted to communicate with an HFC cable network, said first interface having a first protocol stack adapted to;

receive MPEG-encoded signals from an entity coupled to said HFC cable network according to a first protocol; and

extract a first portion of said signals which are encoded according to a second protocol;

a second interface having a second protocol stack, said second interface being adapted to;

communicate with a premises coaxial cable network, said premises coaxial cable network comprising cabling within a premises and having at least one computerized device coupled thereto;

transfer said first portion of said signals to said at least one computerized device; and

deliver a second portion of said signals not encoded according to said second protocol to apparatus operatively coupled to said premises coaxial cable network; and

a translation entity adapted to translate a first address associated with said router apparatus on said HFC cable network to a second address associated with said premises coaxial cable network, said second address being used to deliver said portion of MPEG-encoded signals to said at least one computerized device;

wherein said apparatus is configured to;

boot up said second interface first;

generate a downstream transmission channel;

connect to at least one access point;

assign an address to said at least one access point;

boot up said first interface, said first interface designed to search for signals on said HFC cable network; and

acquire an address from said HFC cable network if a signal is found thereon;

or

acquiring an address from an external source if no signal is found on said HFC network.

17. The apparatus of claim 16, wherein said at least one computerized device is able to communicate via an internet protocol.

18. The apparatus of claim 16, wherein said external source comprises a user, said user entering said address via an on-screen display.

19. The apparatus of claim 16, wherein said second protocol comprises at least one of:

the Internet Protocol;

the RTP protocol;

the RTCP protocol;

or

the Session Initiation Protocol (SIP).

20. The apparatus of claim 16, wherein said act of transferring said first and said second portions of said signals to said at least one computerized device comprises utilizing unused bandwidth of said HFC cabling within said premises.