Asymmetric communication system with regulated upstream channel

• US 6,104,727 A
• Filed: 12/17/1998
• Issued: 08/15/2000
• Est. Priority Date: 04/21/1995
• Status: Expired due to Fees

• Current Assignee: Hybrid Patents Incorporated
• Original Assignee: Hybrid Networks, Inc. (Iowave, Inc.)
• Inventors: Luxenberg, Robert A., Enns, Frederick, Moura, Eduardo J., Gronski, Jan Maksymilian, Packer, Robert L.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): HOM, SHICK C
• Application Number:
  US09/212,857
• Time in Patent Office: 607 Days
• Field of Search: 370/230, 370/231, 370/235, 370/312, 370/338, 370/397, 370/400, 370/404, 370/412, 370/427, 370/474, 370/503, 370/468, 370/276
• US Class Current: 370/468
• 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-host 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 asymmetric communication between the host and plural client devices in a way to pre-authorize the amount of upstream data sent by a remote client.

Claims

1. A two way asymmetric network communication system for transferring data between a server and a plurality of remote devices for supporting server-client communication, the communication system comprising:

a plurality of remote interfaces associated with respective remote devices;

a downstream channel in a direct broadcast satellite network, a CATV network, or an over-the-air radio frequency transmission;

an upstream channel in said CATV network, or said over-the-air radio frequency transmission;

a control system acting to generate, for each remote interface, a respective signal that determines an amount of data that one of said plurality of remote interfaces may send during a certain period,

wherein each remote interface includes

a receiver that receives downstream data from the server over the downstream channel, and provides said downstream data to an associated remote device; and

a sender that sends, during the certain period, data from the associated remote device over the upstream channel, said amount of the sent data being governed by the respective signal.

2. The communication system of claim 1 wherein, for each remote interface, the control system generates the respective signal for each activation of the sender in said each remote interface.

3. The communication system of claim 1 wherein said sender sends a credit to one of said plurality of remote interfaces.

4. The communication system of claim 1 wherein the control system includes logic to make the certain period of each remote interface different from the certain period of another of said plurality of remote interfaces.

5. The communication system of claim 4 wherein the control system includes logic to make the certain period of each remote interface mutually exclusive of the certain period of another of said plurality of remote interfaces.

6. A two way asymmetric network communication system for transferring data between a server and a plurality of remote devices for supporting server-client communication, each remote device running a layered communication protocol, the communication system comprising:

a plurality of remote interfaces associated with respective remote devices;

a downstream channel in a direct broadcast satellite network, a CATV network, or an over-the-air radio frequency transmission;

an upstream channel in said CATV network, or said over-the-air radio frequency transmission;

a control system acting to generate, for each remote interface, a respective signal that determines an amount of data that one of said plurality of remote interfaces may send during a certain period,

wherein each remote interface includes

a receiver that receives downstream data from the server over the downstream channel, and provides said downstream data to an associated remote device, such that the downstream channel is transparent to the associated remote device; and

a sender that sends, during the certain period, data from the associated remote device over the upstream channel, such that the upstream channel is transparent to the associated remote device, said amount of the sent data being governed by the respective signal.

7. The communication system of claim 6 wherein, for each remote interface, the control system generates the respective signal for each activation of the sender in said each remote interface.

8. The communication system of claim 6 wherein said sender sends a credit to at least one of said plurality of remote interfaces.

9. The communication system of claim 6 wherein the control system includes logic to make the certain period of each remote interface different from the certain period of another of said plurality of remote interfaces.

10. The communication system of claim 6 wherein the control system includes logic to make the certain period of each remote interface mutually exclusive of the certain period of another of said plurality of remote interfaces.

11. A two way asymmetric network communication system for transferring data between a server and a plurality of remote devices for supporting server-client communication, the communication system comprising:

a plurality of remote interfaces associated with respective remote devices;

a downstream channel in a direct broadcast satellite network, a CATV network, or an over-the-air radio frequency transmission;

an upstream channel in said CATV network, or said over-the-air radio frequency transmission;

a control system, common to the downstream and upstream channels, the control system acting to generate, for each remote interface, a respective signal that determines an amount of data that one of the plurality of remote interfaces may send during a certain period,

wherein each remote interface includes

a receiver that receives downstream data from the server over the downstream channel, and provides said downstream data to an associated remote device; and

a sender that sends, during the certain period, data from the associated remote device over the upstream channel, said amount of the sent data being governed by the respective signal.

12. The communication system of claim 11 wherein, for each remote interface, the control system generates the respective signal for each activation of the sender in said each remote interface.

13. The communication system of claim 11 wherein said sender sends a credit to at least one of said plurality of the remote interfaces.

14. The communication system of claim 11 wherein the control system includes logic to make the certain period of each remote interface different from the certain period of another of said plurality of remote interfaces.

15. The communication system of claim 11 wherein the control system includes logic to make the certain period of each remote interface mutually exclusive of the certain period of another of said plurality remote interfaces.

16. A two way asymmetric network communication system for transferring data between a server and a plurality of remote devices for supporting server-client communication, each remote device running a layered communication protocol, the communication system comprising:

a plurality of remote interfaces associated with respective remote devices;

a downstream channel in a direct broadcast satellite network, a CATV network, or an over-the-air radio frequency transmission;

an upstream channel in said CATV network, or said over-the-air radio frequency transmission;

a control system, common to the downstream and upstream channels, the control system acting to generate, for each remote interface, a respective signal that determines an amount data that one of said plurality of remote interfaces may send during a certain period,

wherein each remote interface includes

a receiver that receives downstream data from the server over the downstream channel, and provides said downstream data to an associated remote device, such that the downstream channel is transparent to the associated remote device; and

a sender that sends, during the certain period, data from the associated remote device over the upstream channel, such that the upstream channel is transparent to the associated remote device, said amount of the sent data being governed by the respective signal.

17. The communication system of claim 16 wherein, for each remote interface, the control system generates the respective signal for each activation of the sender in said each remote interface.

18. The communication system of claim 16 wherein said sender sends a credit to at least one of said plurality of the remote interfaces.

19. The communication system of claim 16 wherein the control system includes logic to make the certain period of each remote interface different from the certain period of another of said plurality of remote interfaces.

20. The communication system of claim 16 wherein the control system includes logic to make certain period of each remote interface mutually exclusive of the certain period of another of said plurality of remote interfaces.

21. A method of operating a two way asymmetric network communication system for transferring data between a host and a plurality of remote devices for supporting communication, the communication system including a plurality of remote interfaces associated with respective remote devices, a downstream channel in a direct broadcast satellite network, a CATV network, or an over-the-air radio frequency transmission, an upstream channel in said CATV network, or said over-the-air radio frequency transmission, the method comprising:

generating, for each remote interface, a respective signal that determines an amount of data that one of said plurality of remote interfaces may send during a certain period, and the following steps, performed by each remote interface, of

receiving downstream data from the host over the downstream channel, and providing said downstream data to an associated remote; and

sending, during the certain period, data from the associated remote device over the upstream channel, said amount of the sent data being governed by the respective signal.

22. The method of claim 21 wherein, for each remote interface, the generating step is performed for each performance of the sending step.

23. The method of claim 21 wherein the certain period for said each remote interface corresponds to a time between sending a credit to the remote interface and receiving another signal indicating that the remote device has completed a set of transmissions.

24. The method of claim 21 wherein the certain period of each remote interface is different from the certain period of another of said plurality of remote interfaces.

25. The method of claim 21 wherein the certain period of each remote interface is mutually exclusive of the certain period of another of said plurality of remote interfaces.

26. A method of operating a two way asymmetric network communication system for transferring data between a host and a plurality of remote devices for supporting communication, each remote device running a layered communication protocol, the communication system including a plurality of remote interfaces associated with respective remote devices, a downstream channel in a direct broadcast satellite network, a CATV network, or an over-the-air radio frequency transmission, an upstream channel in said CATV network, or said over-the-air radio frequency transmission, the method comprising:

generating, for each remote interface, a respective signal that determines an amount of data that one of said plurality of remote interfaces may send during a certain period, and the following steps, performed by each remote interface, of

receiving downstream data from the host over the downstream channel, and providing said downstream data to an associated remote device, such that the downstream channel is transparent to the associated remote device; and

sending, during the certain period, data from the associated remote device over the upstream channel, such that the upstream channel is transparent to the associated remote device, said amount of the sent data being governed by the respective signal.

27. The method of claim 26 wherein, for each remote interface, the generating step is performed for each performance of the sending step.

28. The method of claim 26 wherein the certain period for said each remote interface corresponds to a time between sending a credit to said each remote interface and receiving another signal indicating that the remote device has completed a set of transmissions.

29. The method of claim 26 wherein the certain period of each remote interface is different from the certain period of another of said plurality of remote interfaces.

30. The method of claim 26 wherein the certain period of said each remote interface is mutually exclusive of the certain period of another of said plurality of remote interfaces.

31. A method of operating a two way asymmetric network communication system for transferring data between a host and a plurality of remote devices for supporting communication, the communication system including a plurality of remote interfaces associated with respective remote devices, a downstream channel in a direct broadcast satellite network, a CATV network, or an over-the-air radio frequency transmission, an upstream channel in said CATV network, or said over-the-air radio frequency transmission, and a control system common to the downstream and upstream channels, the method comprising the step, performed by the control system, of

generating, for each remote interface, a respective signal that determines an amount of data that one of said plurality of remote interfaces may send during a certain period, and the following steps, performed by each remote interface, of

receiving downstream data from the over the downstream channel, and providing said downstream data to an associated remote device;

and

sending, during the certain period, data from the associated remote device over the upstream channel, said amount of the sent data being governed by the respective signal.

32. The method of claim 31 wherein, for each remote interface, the generating step is performed for each performance of the sending step.

33. The method of claim 31 wherein the certain period for said each remote interface corresponds to a time between sending a credit to the remote interface and receiving another signal indicating that the remote device has completed a set of transmissions.

34. The method of claim 31 wherein the certain period of each remote interface is different from the certain period of another of said plurality of remote interfaces.

35. The method of claim 31 wherein the certain period of said each remote interface is mutually exclusive of the certain period of another of said plurality of remote interfaces.

36. A method of operating a two way asymmetric network communication system for transferring data between a host and a plurality of remote devices for supporting communication, each remote device running a layered communication protocol, the communication system including a plurality of remote interfaces associated with respective remote devices, a downstream channel in a direct broadcast satellite network, a CATV network, or an over-the-air radio frequency transmission, an upstream channel in said CATV network, or said over-the-air radio frequency transmission, and a control system common to the downstream and upstream channels, the method comprising the step, performed by the control system, of

generating, for each remote interface, a respective signal that determines an amount of data that one of said plurality of remote interfaces may send during a certain period, and the following steps, performed by each remote interface, of

receiving downstream data from the over the downstream channel, and providing said downstream data to an associated remote device, such that the downstream channel is transparent to the associated remote device;

and

sending, during the certain period, data from the associated remote device over the upstream channel, such that the upstream channel is transparent to the associated remote device, said amount of the sent data being governed by the respective signal.

37. The method of claim 36 wherein, for each remote interface, the generating step is performed for each performance of the sending step.

38. The method of claim 36 wherein the certain period for said each remote interface corresponds to a time between sending a credit to said each remote interface and receiving another signal indicating that the remote device has completed a set of transmissions.

39. The method of claim 36 wherein the certain period of each remote interface is different from the certain period of another of said plurality of remote interfaces.

40. The method of claim 36 wherein the certain period of said each remote interface is mutually exclusive of the certain period of another of said plurality of remote interfaces.