Method and apparatus for virtualizing passive optical network, and passive optical network virtualization system

Patent metadata

Field	Value
Publication number	US-10091566-B2
Application number	US-201514964280-A
Country	US
Kind code	B2
Filing date	Dec 9, 2015
Priority date	Jun 9, 2013
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

Embodiments of the present invention provide a method and an apparatus for virtualizing a passive optical network, and a passive optical network virtualization system. The method includes: receiving a virtualized passive optical network creation message, where the virtualized passive optical network creation message includes an ID of a to-be-created VPON and at least one wavelength flow identifier λ-flow ID; and establishing, according to the VPON ID and the at least one λ-flow ID, a communication connection relationship with at least one optical network unit in the virtualized passive optical network identified by the VPON ID. According to the method provided by the embodiments of the present invention, on one hand, complex networking performed to deal with different application scenarios is avoided.

First claim

What is claimed is:

1. A method for virtualizing a passive optical network, the method comprising:
receiving a virtualized passive optical network (VPON) creation message comprising an identifier (VPON ID) of a to-be-created virtualized passive optical network and at least one wavelength flow identifier λ-flow ID, the VPON ID is used to identify the virtualized passive optical network formed by a virtualized optical line terminal and at least one optical network unit, and the λ-flow ID is used to identify one wavelength flow;
sending the virtualized passive optical network creation message to the at least one optical network unit;
receiving registration information that is registered in an optical line terminal and returned by the at least one optical network unit, wherein the registration information comprises a wavelength flow λ-flow entry, and the λ-flow entry comprises an optical network unit identifier and the λ-flow ID; and
establishing a first registration mapping table according to the VPON ID and the λ-flow entry, wherein the first registration mapping table comprises the VPON ID and at least one λ-flow entry.

2. The method according to claim 1 , further comprising:
forwarding a downlink service flow or forwarding an uplink service flow;
wherein forwarding a downlink service flow comprises:
receiving an Ethernet frame, wherein the Ethernet frame carries a first virtual local area network identifier,
querying a first virtualized passive optical network mapping table according to the first virtual local area network identifier, wherein an entry of the first virtualized passive optical network mapping table comprises a virtual local area network identifier, and a VPON ID and a transceiver identifier that correspond to the virtual local area network identifier, and
when a first virtualized passive optical network identifier corresponding to the first virtual local area network identifier is found, encapsulating the Ethernet frame into a gigabit passive optical network encapsulation mode (GEM) frame and then sending the GEM frame to an optical network unit through a PON port corresponding to a first transceiver identifier, wherein a frame header of the GEM frame comprises the first virtualized passive optical network identifier; and

wherein forwarding an uplink service flow comprises:
receiving a GEM frame, wherein the GEM frame carries a second virtualized passive optical network identifier,
querying a first virtualized passive optical network mapping table according to the second virtualized passive optical network identifier, and
when the second virtualized passive optical network identifier is found in the first virtualized passive optical network mapping table, decapsulating the GEM frame.

3. The method according to claim 1 , wherein:
the VPON creation message further comprises an optical module identifier (M ID) and an optical distribution network identifier (ODN ID), wherein the M ID is used to identify an optical module to which a wavelength flow identified by the λ-flow ID belongs, and the ODN ID is for identifying an optical distribution network to which the wavelength flow identified by the λ-flow ID belongs; and
establishing, according to the VPON ID and the at least one λ-flow ID, a communication connection relationship with the at least one optical network unit in the virtualized passive optical network identified by the VPON ID comprises:
sending, to the at least one optical network unit, the virtualized passive optical network creation message that carries the M ID,
receiving registration information that is registered in the virtualized optical line terminal and returned by the at least one optical network unit, wherein the registration information comprises a wavelength flow λ-flow entry, and the λ-flow entry comprises the ODN ID and the M ID, and
establishing a second registration mapping table according to the VPON ID and the λ-flow entry, wherein the second registration mapping table comprises the VPON ID and at least one λ-flow entry.

4. The method according to claim 1 , wherein:
the VPON creation message further comprises an optical module identifier (M ID) and an optical distribution network identifier (ODN ID), the M ID for identifying an optical module to which a wavelength flow identified by the λ-flow ID belongs, and the ODN ID for identifying an optical distribution network to which the wavelength flow identified by the λ-flow ID belongs; and
after establishing, according to the VPON ID and the at least one λ-flow ID, a communication connection relationship with the at least one optical network unit in the virtualized passive optical network identified by the VPON ID, the method further comprises:
forwarding a downlink service flow or forwarding an uplink service flow,
wherein forwarding a downlink service flow comprises:
receiving an Ethernet frame, wherein the Ethernet frame carries a third virtual local area network identifier;
querying a second virtualized passive optical network mapping table according to the third virtual local area network identifier, wherein an entry of the second virtualized passive optical network mapping table comprises a virtual local area network identifier, (VLAN ID), and a VPON ID, a transceiver identifier TRx ID, an M ID and/or an ODN ID that corresponds to the VLAN ID, and comprises at least a VLAN ID, and a VPON ID and a TRx ID that correspond to the VLAN ID; and
when a third virtualized passive optical network identifier and a third transceiver identifier that correspond to the third virtual local area network identifier are found, encapsulating the Ethernet frame into a gigabit passive optical network encapsulation mode (GEM) frame and then sending the GEM frame to an optical network unit through a PON port corresponding to the third transceiver identifier, wherein a frame header of the GEM frame comprises the third virtualized passive optical network identifier, and

wherein forwarding an uplink service flow comprises:
receiving a GEM frame, wherein the GEM frame carries a fourth virtualized passive optical network identifier;
querying a second virtualized passive optical network mapping table according to the fourth virtualized passive optical network identifier; and
when the fourth virtualized passive optical network identifier is found in the second virtualized passive optical network mapping table, decapsulating the GEM frame.

5. A method for virtualizing a passive optical network, the method comprising:
receiving, by an optical network unit, a delivered virtualized passive optical network (VPON) creation message comprising an identifier (VPON ID) of a to-be-created virtualized passive optical network and at least one wavelength flow identifier λ-flow ID;
establishing, by the optical network unit, a λ-flow entry according to the VPON ID and the λ-flow ID, and reporting registration information to an optical line terminal in the virtualized passive optical network identified by the VPON ID, to establish a communication connection relationship with the optical line terminal, wherein the registration information comprises a λ-flow entry, and the λ-flow entry comprises an optical network unit identifier and the λ-flow ID;
receiving an Ethernet frame, wherein the Ethernet frame carries a sixth virtual local area network identifier;
querying a third virtualized passive optical network mapping table according to the sixth virtual local area network identifier, wherein an entry of the third virtualized passive optical network mapping table comprises a VPON ID, and a gigabit passive optical network encapsulation mode (GEM) port identifier, an Ethernet port identifier, and a virtual local area network identifier VLAN ID that correspond to the VPON ID; and
when a sixth virtualized passive optical network identifier

Assignees

• Huawei Tech Co Ltd

Inventors

• Peng Guikai
• Lin Huafeng

Classifications

• H04Q2011/0077

  Labelling aspects, e.g. multiprotocol label switching [MPLS], G-MPLS, MPAS · CPC title

• H04L41/0803

  Configuration setting · CPC title

• H04L12/2863

  Arrangements for combining access network resources elements, e.g. channel bonding (modem pooling H04L25/14; routing of packets H04L45/00; multichannel or multilink protocols H04L69/14) · CPC title

• H04L41/0806

  for initial configuration or provisioning, e.g. plug-and-play · CPC title

• H04L12/46

  Interconnection of networks · CPC title