Apparatus, system and method for a unified circuit switched and packet-based communications system architecture with network interworking functionality

• US 6,026,086 A
• Filed: 01/08/1997
• Issued: 02/15/2000
• Est. Priority Date: 01/08/1997
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Lancelot, Robert W., Newlin, Douglas J.
• Primary Examiner(s): Jung, Min
• Application Number:
  US08/780,516
• Time in Patent Office: 1,133 Days
• Field of Search: 370/352, 370/353, 370/354, 370/401, 370/402, 370/465, 370/466, 370/467
• US Class Current: 370/353
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04L 12/64 Hybrid switching systems

Abstract

An apparatus (105), system (100) and method is provided for a unified circuit switched and packet-based communications system architecture having network interworking functionality. The apparatus (105) includes a circuit switched network interface (130), with the circuit switched network interface coupleable to a network switch (135) for communication of a circuit switched network protocol signal with a circuit switched network (160); a packet-based network interface (140), the packet-based network interface coupleable to a router (115) for communication of a packet-based network protocol signal with a packet-based network (150); a transceiver (120) coupleable to the communications channel (103) for the transmission and reception of a first protocol signal; and a communications controller (145), the communications controller coupled to the circuit switched network interface, to the packet-based network interface and to the transceiver, the communications controller responsive, through a set of program instructions and an interworking function, to interconvert the first protocol signal with the circuit switched network protocol signal and to interconvert the first protocol signal with the packet-based network protocol signal.

Claims

1. A method for a unified circuit switched and packet-based communications system, the method comprising:

establishing a first communication session via a first protocol between a primary station having an interworking function and a secondary station over a common communication path;

establishing a second communication session between the primary station and selectively a network circuit switch or a network packet router via a network specific protocol when the network circuit switch and the network packet router are connected to the primary station;

selecting a traffic channel;

transmitting and receiving data over the selected traffic channel using the first protocol;

using the interworking function, translating signaling information between the first protocol and the network specific protocol;

using the interworking function, bridging data between the first protocol and the network specific protocol; and

releasing the selected traffic channel when either the first or second communication session is terminated.

2. The method of claim 1, further comprising:

transmitting data to the network using the network specific protocol.

3. The method of claim 1, further comprising:

receiving data from the network using the network specific protocol.

4. The method of claim 1, wherein the transmitting and receiving step further comprises:

encapsulating signaling information using the first protocol.

5. The method of claim 1, wherein the transmitting and receiving step further comprises:

encapsulating packet data using the first protocol.

6. The method of claim 1 wherein the network is a circuit switched network.

7. The method of claim 1 wherein the network is a packet-based network.

8. The method of claim 1 wherein the first protocol is a time division multiple access protocol.

9. The method of claim 1 wherein the first protocol is a time division multiple access protocol having a plurality of radio frequency carriers, each radio frequency carrier of the plurality of radio frequency carriers having a plurality of time slots.

10. The method of claim 1 wherein the data bridging step further comprises:

when the network is a circuit switched network, bridging data between the first protocol and the network specific protocol, using an interworking function performing the bridging at a level of internetworking layer one.

11. The method of claim 1 wherein the data bridging step further comprises:

when the network is a packet-based network, bridging data between the first protocol and the network specific protocol, using an interworking function performing the bridging at a level of internetworking layer three.

12. An apparatus for a unified circuit switched and packet-based communications system, the apparatus comprising:

a circuit switched network interface, the circuit switched network interface coupleable to a network switch for communication of a circuit switched network protocol signal with a circuit switched network;

a packet-based network interface, the packet-based network interface coupleable to a router for communication of a packet-based network protocol signal with a packet-based network;

a transceiver coupleable to a communications channel for the transmission and reception of a first protocol signal;

a control unit having a communications controller, the communications controller coupled to the circuit switched network interface, to the packet-based network interface and to the transceiver, the communications controller responsive, through a set of program instructions and an interworking function, to selectively interconvert the first protocol signal with the circuit switched network protocol signal or the first protocol signal with the packet-based network protocol signal, the control unit for assigning from a pool of traffic channels one or more traffic channels for carrying one or more of the protocol signals.

13. The apparatus of claim 12 wherein the communications controller is further responsive to encapsulate signaling information in the first protocol signal.

14. The apparatus of claim 12 wherein the communications controller is further responsive to interconvert data of the first protocol signal with data of the circuit switched network protocol signal utilizing an internetworking layer one interworking function.

15. The apparatus of claim 12 wherein the communications controller is further responsive to interconvert signaling information of the first protocol signal with signaling information of the circuit switched network protocol signal utilizing an internetworking layer three interworking function.

16. The apparatus of claim 12 wherein the communications controller is further responsive to interconvert packet data of the first protocol signal with packet data of the packet-based network protocol signal utilizing an internetworking layer three interworking function.

17. The apparatus of claim 12 wherein the packet-based network protocol signal is an internet protocol data packet.

18. The apparatus of claim 12 wherein the packet-based network protocol signal is an X.25 data packet.

19. The apparatus of claim 12 wherein the packet-based network protocol signal is a frame relay data packet.

20. The apparatus of claim 12 wherein the packet-based network protocol signal is an asynchronous transfer mode data packet.

21. The apparatus of claim 12 wherein the packet-based network protocol signal is a telemetry data packet.

22. The apparatus of claim 12 wherein the communications channel is hybrid fiber coaxial cable.

23. The apparatus of claim 12 wherein the circuit switched network protocol signal is a V.34 signal.

24. The apparatus of claim 12 wherein the circuit switched network protocol signal is an analog signal.

25. The apparatus of claim 12 wherein the circuit switched network protocol signal is an ISDN signal.

26. The apparatus of claim 12 wherein the circuit switched network protocol signal is a T1 signal.

27. The apparatus of claim 12 wherein the circuit switched network protocol signal is an E1 signal.

28. A system for unified circuit switched and packet-based communications, the system comprising:

a plurality of secondary stations;

a primary station having a communication controller, coupled via a transceiver with a communications traffic channel to one or more of the plurality of secondary stations for the transmission and reception of a first protocol signal at a first predetermined frequency;

a circuit switched network interface, the circuit switched network interface coupleable to a network switch for communication of a circuit switched network protocol signal with a circuit switched network;

a packet based network interface, the packet-based network interface coupleable to a router for communication of a packet-based network protocol signal with a packet-based network; and

the communications controller coupled to the circuit switched network interface, to the packet-based network interface and to the transceiver, the communications controller responsive, through a set of program instructions and an interworking function, to selectively interconvert the first protocol signal with the circuit switched network protocol signal or to interconvert the first protocol signal with the packet-based network protocol signal, the communications controller further enabling transmission and reception of the first protocol signal at an alternate frequency if the first predetermined frequency degrades in quality.

29. The system of claim 28 wherein the primary station is further coupled to a circuit switched network and a packet-based network.

30. The system of claim 29 wherein the primary station is responsive, through a set of program instructions and an interworking function, to interconvert the first protocol signal with a circuit switched network protocol signal and to interconvert the first protocol signal with a packet-based network protocol signal.

31. The system of claim 30 wherein the primary station is further responsive to encapsulate signaling information in the first protocol signal.

32. The system of claim 30 wherein the primary station is further responsive to interconvert data of the first protocol signal with data of the circuit switched network protocol signal utilizing an internetworking layer one interworking function.

33. The system of claim 30 wherein the primary station is further responsive to interconvert signaling information of the first protocol signal with signaling information of the circuit switched network protocol signal utilizing an internetworking layer three interworking function.

34. The system of claim 30 wherein the primary station is further responsive to interconvert packet data of the first protocol signal with packet data of the packet-based network protocol signal utilizing an internetworking layer three interworking function.

35. The system of claim 30 wherein the packet-based network protocol signal is an internet protocol data packet.

36. The system of claim 30 wherein the packet-based network protocol signal is an X.25 data packet.

37. The system of claim 30 wherein the packet-based network protocol signal is a frame relay data packet.

38. The system of claim 30 wherein the packet-based network protocol signal is an asynchronous transfer mode data packet.

39. The system of claim 30 wherein the packet-based network protocol signal is a telemetry data packet.

40. The system of claim 30 wherein the communications channel is hybrid fiber coaxial cable.

41. The system of claim 30 wherein the circuit switched network protocol signal is a V.34 signal.

42. The system of claim 30 wherein the circuit switched network protocol signal is an analog signal.

43. The system of claim 30 wherein the circuit switched network protocol signal is an ISDN signal.

44. The system of claim 30 wherein the circuit switched network protocol signal is a T1 signal.

45. The system of claim 30 wherein the circuit switched network protocol signal is an E1 signal.

46. The system of claim 30 further including a control unit for assigning from a pool of traffic channels a predetermined traffic channel for carrying the first protocol signal, the control unit for further releasing to the pool the selected predetermined traffic channel when communication between the primary station and the one or more secondary stations is terminated.