Hybrid access system with automated client-side configuration

• US 5,859,852 A
• Filed: 08/27/1996
• Issued: 01/12/1999
• Est. Priority Date: 04/21/1995
• Status: Expired due to Fees

• Current Assignee: Hybrid Patents Incorporated
• Original Assignee: Hybrid Networks, Inc. (Iowave, Inc.)
• Inventors: Moura, Eduardo J., Gronski, Jan Maksvmilian
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): HOM, SHICK C
• Application Number:
  US08/703,892
• Time in Patent Office: 868 Days
• Field of Search: 370/401, 370/402, 370/449, 370/245, 370/404, 370/431, 370/498, 370/312, 370/346, 370/395, 340/825.52, 340/825.54, 340/825.07, 340/825.08
• US Class Current: 370/449
• CPC Class Codes: H04B 7/18523 Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service arrangements specially adapted for satellite broadcast receiving H04H40/90; picture transmission via satellite H04N1/00103; television transmission via satellite H04N7/20
• CPC Class Codes: H04B 7/18584 Arrangements for data networking, i.e. for data packet routing, for congestion control data switching networks H04L12/00
• CPC Class Codes: H04H 20/38 Arrangements for distribution where lower stations, e.g. receivers, interact with the broadcast
• CPC Class Codes: H04H 20/78 CATV [Community Antenna Television] systems
• CPC Class Codes: H04H 20/81 combined with telephone network over which the broadcast is continuously available
• CPC Class Codes: H04H 60/82 the transmission system being the Internet
• CPC Class Codes: H04J 3/1682 Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04L 12/2856 Access arrangements, e.g. Internet access asynchronous transfer mode networks H04L12/5601; broadband local area networks H04L12/2801; optical access or distribution networks H04Q11/0067; access to open networks H04L12/5691; digital subscriber line end-user equipment and bit-level processing of data on a PSTN-based network H04M11/00; home network gateways H04L12/2834; wireless access networks H04W
• CPC Class Codes: H04L 12/2898 Subscriber equipments DSL modems H04M11/062; cable modems H04L12/2801
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 69/14 Multichannel or multilink protocols
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04M 11/06 Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
• CPC Class Codes: H04N 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/2393 : involving handling client requests scheduling or organising the servicing of application requests H04L67/60
• CPC Class Codes: H04N 21/2408 : Monitoring of the upstream path of the transmission network, e.g. client requests monitoring data switching networks utilization H04L43/0876; scheduling or organising the servicing of application requests H04L67/60
• CPC Class Codes: H04N 21/266 : Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
• CPC Class Codes: H04N 21/437 : Interfacing the upstream path of the transmission network, e.g. for transmitting client requests to a VOD server flow control in data networks H04L47/10; streaming protocols, e.g. RTP or RTCP, H04L65/65; scheduling or organising the servicing of application requests in data packet switching networks H04L67/60
• CPC Class Codes: H04N 21/64322 : IP
• CPC Class Codes: H04N 7/10 : Adaptations for transmission by electrical cable H04N7/12 takes precedence
• CPC Class Codes: H04N 7/17309 : Transmission or handling of upstream communications
• CPC Class Codes: H04N 7/17345 : Control of the passage of the selected programme
• CPC Class Codes: Y02D 30/50 : in wire-line communication networks, e.g. low power modes or reduced link rate
• CPC Class Codes: Y10S 370/911 : Bridge, e.g. brouter, bus extender

Abstract

An asymmetric network communication system for use in a client-server environment having independent forward and return channels operating at different speeds and/or under different protocols on the same or different communication media to provide efficient utilization of shared resources. A network manager, such as a hybrid access system, effects transmission of packetized data on a forward (downstream) channel from the host server to multiple client devices coupled with a shared downstream media at 10 or more megabits per second while simultaneously providing selectable multiple lower speeds of operation on shared or dedicated return (upstream) channels from the client devices to the host server depending on bandwidth availability, bandwidth demand, service level authorization, etc, for the return channel. Forward and return channels may be located on the same or different communication medium including a CATV network, direct broadcast satellite network, television or radio RF broadcast network, wireless or mobile cellular facilities or the like. The return channel may reside on a PSTN either directly coupled with the host server or connected with the network manager for subsequent transmission to the host server. The network manager handles or controls the forward and return communication to establish interactive full-duplex real-time network sessions between the host and a selected client device. The network manager switches upstream channel assignment based on quality of signals transmitted to the host, effects changes in the upstream transmitted power based on sensed conditions, and automatically configures new client devices as they are added to the network.

Claims

1. A method of configuring a remote device for achieving a network connection in an asymmetric network system including plural remote devices sharing a common medium for conducting interactive sessions with a host computer under control of a network manager, and a router including a selected one of an IP router, a bridge, and a switching device for providing path control, said method comprising:

receiving at said network manager an indication of a remote device seeking to establish connection with said asymmetric network system, the indication including one of a predetermined unique abstract name and a device ID associated with said remote device,

broadcasting a configuration poll message over said common medium,

providing a response to said configuration poll message by said remote device,

said network manager allocating configuration data for said remote device seeking to establish connection with said network,

sending said configuration data to said remote device over said common medium,

configuring said remote device in accordance with said allocated configuration data; and

controlling said router, by said network manager, to receive new remote device indications over said common medium and broadcast of configuration poll data over said common medium.

2. An asymmetric network communication system including a server, a plurality of remote clients and an information distribution facility for distributing data to said remote clients, said communication system comprising:

a downstream channel that resides in a medium shared by said plurality of remote clients so as to enable said plurality of remote clients to receive high speed data from said server,

at least one upstream channel that enables at least one of said remote clients to transmit lower speed return data to said server, and

a network manager for effecting transfers of data between said server and said remote clients over said shared medium in accordance with upstream and downstream channel protocols, for initially identifying at least one of said remote clients using an abstract name, for establishing configuration of remote clients by effecting polling of remote clients and registering an identification of a remote client responding to a poll made with a particular abstract name, and for effecting upstream channel allocation according to a configuration information including abstract name and identification.

3. The network communication system as recited in claim 2, wherein said network manager includes a server interface that enables communication with said server, a downstream routing device for enabling transmission of high speed data to said remote clients over said shared medium and an upstream router for receiving return data from said remote clients.

4. The network communication system as recited in claim 3, wherein said remote clients include remote interfaces and said downstream router couples said shared medium to establish a physical connection with said downstream channel and said upstream router couples said remote interfaces to establish a physical connection with said upstream channel.

5. The network communication system as recited in claim 2, wherein said upstream channel and said downstream channel reside in different communication media.

6. The network communication system as recited in claim 2, wherein said shared medium that carries said downstream channel comprises a selected one of a hybrid fiber coaxial cable system, a CATV network, an over-the-air wireless broadcast medium, a cellular network and a direct broadcast satellite network.

7. The network communication system as recited in claim 6, wherein said upstream channel resides in a selected one of a PSTN network, a cable return network of a CATV system, and an over-the-air RF broadcast.

8. The network communication system as recited in claim 2, wherein said network manager selectably controls speed of data transfers on said upstream channel so as to provide more effective utilization of channel bandwidth according to demand by respective remote clients communicating with said shared medium.

9. In an asymmetric network communication system including at least one downstream channel in a shared medium for conveying high speed data from a host to plural client devices and at least one upstream channel for conveying lower speed return data from the plural remote devices to the host, and a system manager being operative for effecting transfers of data on both the upstream and the downstream channels in sessions between the host and the plural client devices, a method of configuring a new client on the communication system comprising:

the system manager receiving a new-client indication associated with the new client, the new-client indication including a predetermined unique abstract name associated with said new client;

broadcasting a configuration poll message over the shared medium, after the system manager receives the new-client indication;

providing a response to the configuration poll message by the new client that identifies the new client;

forwarding a new client found message to the system manager;

ceasing configuration polling;

allocating configuration data for the new client;

sending a protocol address to the new client; and

configuring the new client according to the protocol address data.

10. The method as recited in claim 9, wherein the unique abstract name is registered by the system manager into a configuration database.

11. The method as recited in claim 9, wherein the configuration poll message includes the unique client name.

12. In an asymmetric network communication system including at least one downstream channel in a shared medium for conveying high speed data from a host to plural client devices and at least one upstream channel for conveying lower speed return data from the plural remote devices to the host, and a system manager being operative for effecting transfers of data on both the upstream and the downstream channels in sessions between the host and the plural client devices, a method of configuring a new client on the communication system comprising:

the system manager receiving a new-client indication associated with the new client, the new-client indication including an equipment identification number associated with the new client;

broadcasting a configuration poll message over the shared medium, after the system manager receives the new-client indication;

providing a response to the configuration poll message by the new client that identifies the new client;

forwarding a new client found message to the system manager;

ceasing configuration polling;

allocating configuration data for the new client;

sending a protocol address to the new client; and

configuring the new client according to the protocol address data.

13. In an asymmetric communication system including a first node, a plurality of second nodes, a shared first channel for sending packets from the first node to the plurality of second nodes, a plurality of second channels for sending packets from the second nodes to the first node, and a third node, a method comprising the step, performed in one of the second nodes before the one of the second nodes has discovered an internetwork address associated with the one of the second nodes, of:

receiving, from the third node, the internetwork address associated with one of the second nodes,

the step, performed in the first node, of

sending a first plurality of packets to the one of the second nodes, by sending the first plurality of packets over the shared first channel, each of the first plurality of packets including an internetwork header with the internetwork address associated with the one of the second nodes, and

the steps, performed in the one of the second nodes, of

receiving, from the shared first channel, the first plurality of packets sent from the first node; and

sending a second plurality of packets to the first node, by sending the second plurality of packets over one of the second channels, each of the second plurality of packets including an internetwork header with the internetwork address associated with the one of the second nodes.

14. The method of claim 13 further including the step, performed in the one of the second nodes before the first receiving step, of sending a signal for identifying the one of the second nodes.

15. The method of claim 14 further including the steps of

receiving the signal for identifying the one of the second nodes;

and

sending, responsive to the signal for identifying, the internetwork address associated with the second node.

16. The method of claim 13 further including the steps, performed in the one of the second nodes before the first receiving step, of

receiving a first signal;

and

sending, responsive to the first signal, a second signal, the second signal acting to identify the one of the second nodes.

17. The method of claim 16 further including the steps of

receiving the second signal;

and

sending, responsive to the second signal, the internetwork address associated with the second node.

18. The method of claim 13 wherein the plurality of second channels includes a telephone network, and the step of sending a second plurality of packets includes:

sending the second plurality of packets over the telephone network.

19. The method of claim 13 wherein the first channel includes a cable network, and the plurality of second channels includes the cable network, each of the plurality of second channels having respective frequencies in the cable network, and the step of sending a second plurality of packets includes sending includes:

sending the second plurality of packets over the cable network.

20. The method of claim 13 wherein the first channel includes a cable network, and the plurality of second channels includes the cable network, each of the plurality of second channels having a respective time slot and the sending step includes:

sending the signal over the cable network.

21. The method of claim 13 wherein the first channel includes a wireless broadcast network, and the step of sending the first plurality of packets includes:

sending the first plurality of packets over the wireless broadcast network.

22. The method of claim 13 wherein the first channel includes a wireless broadcast network, and the plurality of second channels include the wireless broadcast network, step of sending the second plurality of packets includes:

sending the second plurality of packets over the wireless broadcast network.

23. The method of claim 13 wherein the first channel includes a satellite broadcast network, and the plurality of second channels include a telephone network, and the step of a second plurality of packets sending includes:

sending the signal over the telephone network.

24. The method of claim 13 wherein the first channel is in a selected one of:

a CATV network, over-the-air wireless broadcast, an RF broadcast, an electromagnetic transmission, a coaxial cable network, direct broadcast satellite transmission, telephone network, hybrid fiber coaxial network and a cellular broadcast system, and the plurality of second channels are in a selected one of;

a CATV network, over-the-air wireless broadcast, an RF broadcast, an electromagnetic transmission, a coaxial cable network, direct broadcast satellite transmission, telephone network, hybrid fiber coaxial network and a cellular broadcast system, and the step of sending the second plurality of packets includes;

sending the second plurality of packets over the selected one of;

a CATV network, over-the-air wireless broadcast, an RF broadcast, an electromagnetic transmission, a coaxial cable network, direct broadcast satellite transmission, telephone network, hybrid fiber coaxial network and a cellular broadcast system.

25. In a system including a first channel residing in a shared medium for sending packets, and a plurality of second channels for sending packets, an asymmetric communication system comprising:

a server,

a plurality of clients;

a first node,

each client including

a receiver, active before the client has discovered an internetwork address associated with the client, the receiver acting to receive, from the first node, the internetwork address associated with the client,

the server including

sender that sends a first plurality of packets to the clients, by sending the first plurality of packets over the shared first channel, each of the first plurality of packets including an internetwork header with the internetwork address associated with one of the clients, each client further including

a receiver that receives, from the shared first channel, one of the first plurality of packets sent from the server; and

a sender that sends a second packet to the server, by sending the second packet over one of the second channels, the second packet including an internetwork header with the internetwork address associated with the client.

26. The system of claim 25 further including a second node that processes a signal sent from one of the clients, the signal acting to identify the one of the clients.

27. The system of claim 26 wherein the first and second nodes are configured to send, responsive to the signal for identifying, the internetwork address associated with the client.

28. The system of claim 25 wherein each client includes a responder that

receives a first signal, and

sends, responsive to the first signal, a second signal, the second signal acting to identify the one of the clients.

29. The system of claim 28 wherein the first and second nodes are configured to

receive the second signal;

and

send, responsive to the second signal, the internetwork address associated with the client.

30. The system of claim 25 further including:

a telephone network, wherein the plurality of second channels are in the telephone network.

31. The system of claim 25 further including:

a cable network, wherein the first channel is in the cable network, and the plurality of second channels are in the cable network, each of the plurality of second channels having respective frequencies in the cable network, each of the plurality having first channels operating at a lower speed than a speed of the second channel.

32. The system of claim 25 wherein the first channel includes a cable network, and the plurality of second channels includes the cable network, each of the plurality of second channels having a respective time slot.

33. The system of claim 25 wherein the first channel includes a wireless broadcast network, and the plurality of second channels includes the wireless broadcast network, each of the plurality of second channels having a respective frequency.

34. The system of claim 25

a wireless broadcast network, wherein the first channel includes a wireless broadcast network, and the plurality of second channels includes the wireless broadcast network, each of the plurality of seconds channels having a respective time slot.

35. The system of claim 25 wherein the first channel includes a satellite broadcast network, and the plurality of second channels includes a telephone network.

36. The system of claim 25 wherein the first channel is in a selected one of:

a CATV network, over-the-air wireless broadcast, an RF broadcast, an electromagnetic transmission, a coaxial cable network, direct broadcast satellite transmission, telephone network, hybrid fiber coaxial network and a cellular broadcast system, and the plurality of second channels are in a selected one of;

a CATV network, over-the-air wireless broadcast, an RF broadcast, an electromagnetic transmission, a coaxial cable network, direct broadcast satellite transmission, telephone network, hybrid fiber coaxial network and a cellular broadcast system.