Optical network interface devices and methods

• US 8,401,387 B2
• Filed: 05/15/2008
• Issued: 03/19/2013
• Est. Priority Date: 08/30/2007
• Status: Active Grant

• Current Assignee: Calix Incorporated
• Original Assignee: Calix Incorporated
• Inventors: Biegert, Mark R., Paulsen, Mark T.
• Primary Examiner(s): Bello, Agustin
• Application Number:
  US12/121,243
• Publication Number:
  US 20090060530A1
• Time in Patent Office: 1,769 Days
• Field of Search: 398 66- 72, 398/117
• US Class Current: 398/72
• CPC Class Codes: H04J 14/0226 Fixed carrier allocation, e.g. according to service
• CPC Class Codes: H04J 14/0232 for downstream transmission
• CPC Class Codes: H04J 14/0247 Sharing one wavelength for at least a group of ONUs
• CPC Class Codes: H04J 14/0252 Sharing one wavelength for at least a group of ONUs, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
• CPC Class Codes: H04J 14/0282 WDM tree architectures
• CPC Class Codes: H04J 14/0298 with sub-carrier multiplexing [SCM]
• 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 12/2861 Point-to-multipoint connection from the data network to the subscribers
• CPC Class Codes: H04L 12/2885 Arrangements interfacing with optical systems optical network equipment H04B10/00; optical multiplexers H04J14/05 and H04J14/07
• CPC Class Codes: H04Q 11/0067 Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
• CPC Class Codes: H04Q 11/0071 Provisions for the electrical-optical layer interface

Abstract

A system comprises an optical network terminal (ONT) that provides an interface to a passive optical network (PON). The ONT is coupled to a subscriber gateway device via at least one cable. The ONT may be located outside a subscriber premises while the subscriber gateway device may be located within the subscriber premises. The ONT converts optical signals received from PON to electrical signals and transmits the electrical signals to the subscriber gateway device without performing any MAC layer functions. The subscriber gateway device includes an optical media access control (MAC) unit that converts the electrical signals into MAC layer signals and a gateway unit that distributes the MAC layer signals to one or more subscriber devices. In this manner the MAC and gateway layer functions are relocated from the ONT to the subscriber gateway device.

Claims

1. A system comprising:

an optical network terminal (ONT) that converts optical signals representing information packets received from a passive optical network (PON) via an optical fiber link to electrical signals, wherein the electrical signals comprise raw bits; and

a subscriber gateway device coupled to the ONT via at least one cable, the subscriber gateway device including;

an optical media access control (MAC) unit that receives the electrical signals from the ONT via at least one pair of electrical conductors included in the cable and converts the electrical signals into MAC layer signals representing the information packets; and

a gateway unit that distributes the MAC layer signals to one or more subscriber devices,

wherein the ONT converts the optical signals received from the PON to electrical signals and transmits the electrical signals to the subscriber gateway device without performing any MAC layer functions including without converting the electrical signals into distinct data units and without providing addressing and channel access control mechanisms for transmission of the electrical signals to the subscriber gateway device.

2. The system of claim 1, wherein the ONT includes:

an optical physical layer (PHY) component that receives optical signals from the optical network;

a media converter that converts the optical signals to drive signals; and

an electrical physical layer (PHY) component that transmits the electrical signals to the subscriber gateway device in accordance with the drive signals.

3. The system of claim 2, wherein the optical PHY component, the media converter and the electrical PHY component are housed within a pluggable optical module that is removably plugged into a socket of the ONT.

4. The system of claim 1, wherein the optical MAC unit of the subscriber gateway device is selectively configurable to support a plurality of optical network protocols.

5. The system of claim 4, wherein the optical MAC unit is selectively configurable to support two or more of a broadband passive optical network (BPON), a gigabit-capable passive optical network (GPON), a gigabit-capable Ethernet passive optical network (GEPON) and an active Ethernet optical network.

6. The system of claim 4, wherein the optical MAC unit is selectively configurable to support at least one active optical network protocol and at least one passive optical network protocol.

7. The system of claim 1, wherein the gateway unit includes at least one of a switch, a wireless router, and an integrated access device to distribute the MAC layer signals to the one or more subscriber devices.

8. The system of claim 1, wherein the gateway unit extracts the information packets from the MAC layer signals and distributes the information packets to the one or more subscriber devices.

9. The system of claim 1, wherein the one or more subscriber devices include at least one of a telephone, television, computer, set-top box, wireless access point, powerline modem and router.

10. The system of claim 1, wherein the ONT is located outside a subscriber premises and the subscriber gateway device is located inside the subscriber premises, and wherein the cable penetrates at least one wall between the outside and the inside of the subscriber premises.

11. The system of claim 1, wherein the at least one cable comprises a single cable that includes a plurality of conductors including the at least one pair of electrical conductors and other conductors.

12. The system of claim 11, further comprising an uninterruptible power supply (UPS) that generates operating power for the ONT and sends the operating power to the ONT via at least one of the other conductors of the single cable.

13. The system of claim 11, further comprising a radio frequency (RF) video distribution unit coupled to the ONT via the single cable, wherein the ONT converts optical signals representing RF video to electrical signals and converts the electrical signals to RF video signals, wherein the RF video distribution unit receives the RF video signals from the ONT via at least one coaxial conductor included in the single cable.

14. A method comprising:

receiving, with an optical network terminal (ONT) that is connected to a passive optical network (PON) via an optical fiber link, optical signals representing information packets via the optical fiber link;

converting, with the ONT, the optical signals to electrical signals, wherein the electrical signals comprise raw bits;

sending the electrical signals from the ONT to a subscriber gateway device coupled to the ONT via at least one pair of electrical conductors included in at least one cable without performing any media access control (MAC) layer functions with the ONT, including without converting the electrical signals into distinct data units and without providing addressing and channel access control mechanisms for transmission of the electrical signals to the subscriber gateway device;

converting, with the subscriber gateway device, the electrical signals into MAC layer signals representing the information packets; and

distributing, with the subscriber gateway device, the MAC layer signals to one or more subscriber devices coupled to the subscriber gateway device.

15. The method of claim 14, wherein

receiving the optical signals comprises receiving the optical signals from the optical network with an optical physical layer (PHY) component;

converting the optical signals to electrical signals comprises converting the optical signals to drive signals with a media converter; and

sending the electrical signals comprises transmitting the electrical signals to the subscriber gateway device in accordance with the drive signals using an electrical physical layer (PHY) component.

16. The method of claim 15, further comprising housing the optical PHY component, the media converter and the electrical PHY component within a pluggable optical module that is removably plugged into a socket of ONT.

17. The method of claim 14, further comprising selectively configuring the subscriber gateway device to support a plurality of optical network protocols.

18. The method of claim 17, wherein selectively configuring the subscriber gateway device comprises selectively configuring the subscriber gateway device to support two or more of a broadband passive optical network (BPON), a gigabit-capable passive optical network (GPON), a gigabit-capable Ethernet passive optical network (GEPON) and an active Ethernet optical network.

19. The method of claim 17, wherein selectively configuring the subscriber gateway device comprises selectively configuring the subscriber gateway device to support at least one active optical network protocol and at least one passive optical network protocol.

20. The method of claim 14, wherein the subscriber gateway device includes at least one of a switch, a wireless router, and an integrated access device to distribute the MAC layer signals to the one or more subscriber devices coupled to the subscriber gateway device.

21. The method of claim 14, further comprising:

extracting, with the subscriber gateway device, the information packets from the MAC layer signals; and

distributing, with the subscriber gateway device, the information packets to the one or more subscriber devices.

22. The method of claim 14, wherein the ONT is located outside a subscriber premises and the subscriber gateway device is located inside the subscriber premises, and wherein the cable penetrates at least one wall between the outside and the inside of the subscriber premises.

23. The method of claim 14, wherein the at least one cable comprises a single cable that includes a plurality of conductors including the at least one pair of electrical conductors and other conductors, the method further comprising sending operating power from an uninterruptible power supply (UPS) to ONT via at least one of the other conductors of the single cable.

24. The method of claim 14, wherein the at least one cable comprises a single cable that includes a plurality of conductors including the at least one pair of electrical conductors and other conductors, the method further comprising further comprising:

converting, with the ONT, optical signals representing radio frequency (RF) video to electrical signals;

converting the electrical signals to RF video signals; and

sending the RF video signals from the ONT to an RF video distribution unit via at least one coaxial conductor included in the single cable.

25. An optical network terminal (ONT) connected to a passive optical network (PON) via an optical fiber link, the ONT comprising:

an optical physical layer (PHY) component that receives optical signals representing information packets from the optical network;

a media converter that converts the optical signals to drive signals; and

an electrical physical layer (PHY) component that transmits electrical signals to a subscriber gateway device coupled to the ONT via at least one pair of electrical conductors included in at least one cable in accordance with the drive signals, wherein the electrical signals comprise raw bits, and wherein the ONT transmits the electrical signals to the subscriber gateway device without performing any media access control (MAC) layer functions with the ONT, including without converting the electrical signals into distinct data units and without providing addressing and channel access control mechanisms for transmission of the electrical signals to the subscriber gateway device.

26. The ONT of claim 25, wherein the optical PHY component, the media converter and the electrical PHY component are housed within a pluggable optical module that is removably plugged into a socket of ONT.

27. The ONT of claim 25, wherein the at least one cable comprises a single cable that includes a plurality of conductors including the at least one pair of electrical conductors and other conductors, the ONT further comprising a power source that receives operating power from an uninterruptible power supply (UPS) via at least one of the other conductors of the single cable.

28. The ONT of claim 25, wherein the at least one cable comprises a single cable that includes a plurality of conductors including the at least one pair of electrical conductors and other conductors, and the ONT converts optical signals representing radio frequency (RF) video to electrical signals, converts the electrical signals to RF video signals and transmits the RF video signals to an RF video distribution unit via at least one coaxial conductor included in the single cable.

29. A method comprising:

receiving, with an optical network terminal (ONT) that is connected to a passive optical network (PON) via an optical fiber link, optical signals representing information packets via the optical fiber link;

converting, with the ONT, the optical signals to electrical signals, wherein the electrical signals comprise raw bits; and

sending, with the ONT, the electrical signals to a subscriber gateway device coupled to the ONT via at least one pair of electrical conductors included in at least one cable without performing any media access control (MAC) layer functions with the ONT, including without converting the electrical signals into distinct data units and without providing addressing and channel access control mechanisms for transmission of the electrical signals to the subscriber gateway device.

30. The method of claim 29, wherein receiving the optical signals comprises receiving the optical signals from the optical network with an optical physical layer (PHY) component;

converting the optical signals to electrical signals comprises converting the optical signals to drive signals with a media converter; and

sending the electrical signals to the subscriber gateway device comprises transmitting the electrical signals to the subscriber gateway device in accordance with the drive signals using an electrical physical layer (PHY) component.

31. The method of claim 30, further comprising housing the optical PHY component, the media converter and the electrical PHY component within a pluggable optical module that is removably plugged into a socket of ONT.

32. The method of claim 29, wherein the at least one cable comprises a single cable that includes a plurality of conductors including the at least one pair of electrical conductors and other conductors, the method further comprising receiving operating power from an uninterruptible power supply (UPS) via at least one of the other conductors of the single cable.

33. The method of claim 29, wherein the at least one cable comprises a single cable that includes a plurality of conductors including the at least one pair of electrical conductors and other conductors, the method further comprising:

converting, with the ONT, optical signals representing radio frequency (RF) video to electrical signals;

converting the electrical signals to RF video signals; and

sending, with the ONT, the RF video signals to an RF video distribution unit via at least one coaxial conductor included in the single cable.

34. An optical network terminal (ONT) connected to a passive optical network (PON) via an optical fiber link, the ONT comprising:

means for receiving optical signals representing information packets via the optical fiber link;

means for converting the optical signals to electrical signals, wherein the electrical signals comprise raw bits; and

means for sending the electrical signals to a subscriber gateway device coupled to the ONT via at least one pair of electrical conductors included in at least one cable, wherein the ONT sends the electrical signals to the subscriber gateway device without performing any media access control (MAC) layer functions with the ONT, including without converting the electrical signals into distinct data units and without providing addressing and channel access control mechanisms for transmission of the electrical signals to the subscriber gateway device.

35. The ONT of claim 34, wherein

the receiving means comprises an optical physical layer (PHY) component;

the converting means comprises a media converter that converts the optical signals to drive signals; and

the sending means an electrical physical layer (PHY) component that transmits the electrical signals to the subscriber gateway device in accordance with the drive signals.

36. The ONT of claim 35, further comprising means for housing the optical PHY component, the media converter and the electrical PHY component within a pluggable optical module that is removably plugged into a socket of ONT.

37. The ONT of claim 34, wherein the at least one cable comprises a single cable that includes a plurality of conductors including the at least one pair of electrical conductors and other conductors, the ONT further comprising:

means for powering the ONT,

wherein the powering means receives operating power from an uninterruptible power supply (UPS) via at least one of the other conductors of the single cable.

38. The ONT of claim 34, wherein the at least one cable comprises a single cable that includes a plurality of conductors including the at least one pair of electrical conductors and other conductors, and:

the converting means converts optical signals representing radio frequency (RF) video to electrical signals, and converts the electrical signals to RF video signals; and

the sending means sends the RF video signals to an RF video distribution unit via at least one coaxial conductor included in the single cable.

39. A subscriber gateway device coupled to an optical network terminal (ONT) of a passive optical network (PON) via at least one cable, the subscriber gateway device comprising:

an optical media access control (MAC) unit that receives electrical signals from the ONT via at least one pair of electrical conductors included in the cable, and converts the electrical signals into MAC layer signals representing information packets, wherein the electrical signals comprise raw bits, and wherein the optical MAC unit receives the electrical signals without any MAC layer functions performed on the electrical signals by the ONT, including without converting the electrical signals into distinct data units and without providing addressing and channel access control mechanisms for transmission of the electrical signals to the subscriber gateway device; and

a gateway unit that distributes the MAC layer signals to one or more subscriber devices coupled to the subscriber gateway device.

40. The subscriber gateway device of claim 39, wherein the optical MAC unit of the subscriber gateway device is selectively configurable to support a plurality of optical network protocols.

41. The subscriber gateway device of claim 40, wherein the optical MAC unit is selectively configurable to support two or more of a broadband passive optical network (BPON), a gigabit-capable passive optical network (GPON), a gigabit-capable Ethernet passive optical network (GEPON) and an active Ethernet optical network.

42. The subscriber gateway device of claim 40, wherein the optical MAC unit is selectively configurable to support at least one active optical network protocol and at least one passive optical network protocol.

43. The subscriber gateway device of claim 39, wherein the gateway unit includes at least one of a switch, a wireless router, and an integrated access device to distribute the MAC layer signals to the one or more subscriber devices.

44. The subscriber gateway device of claim 39, wherein the gateway unit extracts the information packets from the MAC layer signals and distributes the information packets to the one or more subscriber devices.

45. The subscriber gateway device of claim 39, wherein the one or more subscriber devices include at least one of a telephone, television, computer, set-top box, wireless access point, powerline modem and router.

46. A method comprising:

receiving, with a subscriber gateway device, electrical signals from an optical network terminal (ONT) of a passive optical network (PON) via at least one pair of electrical conductors included in at least one cable, wherein the electrical signals comprise raw bits, and wherein the electrical signals are received without any media access control (MAC) layer functions performed on the electrical signals by the ONT, including without converting the electrical signals into distinct data units and without providing addressing and channel access control mechanisms for transmission of the electrical signals to the subscriber gateway device;

converting, with the subscriber gateway device, the electrical signals into MAC layer signals representing information packets; and

distributing, with the subscriber gateway device, the MAC layer signals to one or more subscriber devices coupled to the subscriber gateway device.

47. The method of claim 46, further comprising selectively configuring the subscriber gateway device to support a plurality of optical network protocols.

48. The method of claim 47, wherein selectively configuring the subscriber gateway device comprises selectively configuring the subscriber gateway device to support two or more of a broadband passive optical network (BPON), a gigabit-capable passive optical network (GPON), a gigabit-capable Ethernet passive optical network (GEPON) and an active Ethernet optical network.

49. The method of claim 47, wherein selectively configuring the subscriber gateway device comprises selectively configuring the subscriber gateway device to support at least one active optical network protocol and at least one passive optical network protocol.

50. The method of claim 46, wherein the subscriber gateway device includes at least one of a switch, a wireless router, and an integrated access device to distribute the MAC layer signals to the one or more subscriber devices.

51. The method of claim 46, further comprising:

extracting, with the subscriber gateway device, the information packets from the MAC layer signals; and

distributing, with the subscriber gateway device, the information packets to the one or more subscriber devices.

52. A subscriber gateway device coupled to an optical network terminal (ONT) of a passive optical network (PON) via at least one cable, the subscriber gateway device comprising:

means for receiving electrical signals from the ONT via at least one pair of electrical conductors included in the at least one cable, wherein the electrical signals comprise raw bits, and wherein the electrical signals are received without any media access control (MAC) layer functions performed on the electrical signals by the ONT, including without converting the electrical signals into distinct data units and without providing addressing and channel access control mechanisms for transmission of the electrical signals to the subscriber gateway device;

means for converting the electrical signals into MAC layer signals representing information packets; and

means for distributing the MAC layer signals to one or more subscriber devices coupled to the subscriber gateway device.

53. The subscriber gateway device of claim 52, further comprising means for selectively configuring the subscriber gateway device to support a plurality of optical network protocols.

54. The subscriber gateway device of claim 53, wherein the configuring means selectively configure the subscriber gateway device to support two or more of a broadband passive optical network (BPON), a gigabit-capable passive optical network (GPON), a gigabit-capable Ethernet passive optical network (GEPON) and an active Ethernet optical network.

55. The subscriber gateway device of claim 53, wherein the configuring means selectively configure the subscriber gateway device to support at least one active optical network protocol and at least one passive optical network protocol.

56. The subscriber gateway device of claim 52, wherein the distributing means includes at least one of a switch, a wireless router, and an integrated access device to distribute the MAC layer signals to the one or more subscriber devices.

57. The subscriber gateway device of claim 52, further comprising:

means for extracting the information packets from the MAC layer signals; and

means for distributing the information packets to the one or more subscriber devices.