Unified network management of hybrid fiber coaxial (HFC) network
View Patent ↗Embodiments enable a network operator to use any (and a single) network management system (NMS) that it desires to manage a network having mixed fiber to the home optical network units (ONUs) and coaxial connected cable modems. For example, embodiments enable a cable company operator to use a DOCSIS (Data Over Cable Service Interface Specification) NMS (which the cable company already uses to manage its DOCSIS network) to manage such mixed network, by a simple addition of a DOCSIS Mediation Layer (DML) module between the NMS and the optical line terminal (OLT). On the other hand, embodiments enable a telephone company operator to use a standard EPON (Ethernet Passive Optical Network) OLT NMS with minor OLT and OAM (Operations, Administration, and Maintenance) protocol modifications to manage the same mixed network.
1. A system for unified management of fiber connected optical network units (ONUs) and coaxial connected cable modems (CMs) in a hybrid fiber coaxial (HFC) network, comprising:
an Ethernet Passive Optical Network (EPON) optical line terminal (OLT) module connected to an ONU via a first fiber optic line;
a Coaxial Media Converter (CMC) connected to the EPON OLT module via a second fiber optic line and to a CM via a coaxial cable; and
a network management system (NMS), coupled to the EPON OLT module, having a host interface configured to issue a management command to the ONU or to the CM,
wherein the EPON OLT module is configured to generate an EPON Operations, Administration, and Maintenance (OAM) message based on the management command issued by the NMS, and
wherein the CMC is configured to receive the EPON OAM message when it is issued for the CM and to convert the EPON OAM message to a Data Over Cable Service Interface Specification (DOCSIS) OAM message.
2. The system of claim 1 , wherein the host interface uses a common management command format whether issuing the management command to the fiber connected ONU or the coaxial connected CM.
3. The system of claim 2 , wherein the common management command format includes a label field to indicate whether the management command is intended for the fiber connected ONU or the coaxial connected CM.
4. The system of claim 2 , wherein the host interface is further configured to issue the management command to the CMC, and wherein the host interface uses the common management command format when issuing the management command to the CMC.
5. The system of claim 1 , wherein the EPON OAM message includes a CM context field when the management command issued by the NMS is intended for the CM.
6. The system of claim 1 , wherein the CMC terminates an EPON OAM logical link with the EPON OLT module.
7. The system of claim 1 , wherein the CM supports a DOCSIS OAM protocol.
8. The system of claim 1 , wherein the NMS and the OLT module are located in separate sub-systems.
9. The system of claim 1 , wherein the NMS and the EPON OLT module are integrated in an OLT system.
10. The system of claim 1 , wherein the NMS is a standard EPON OLT NMS, a proprietary EPON our NMS, or a non-EPON OLT NMS.
11. The system of claim 10 , wherein the NMS is the non-EPON OLT NMS, the system further comprising:
an OLT mediation module that translates between the non-EPON OLT NMS and the EPON OLT module.
12. The system of claim 11 , wherein the NMS is a DOCSIS NMS, and wherein the OLT mediation module includes a DOCSIS mediation layer (DML) module.
13. The system of claim 11 , wherein the OLT mediation module is integrated within the EPON OLT module.