Digital subscriber line access multiplexer, optical network unit, optical line terminal and base station

An Optical Line Terminal (OLT) comprising:

• at least two logic-independent virtual OLT units adapted to process a packet based on a respective pre-configured protocol;
• an Optical Distribution Node interface unit connected with one or more Optical Network Units (ONUs) or Optical Network Terminals (ONTs) via an Optical Distribution Node (ODN) for processing Physical Layer and Data Link Layer of a Passive Optical Network (PON), and for sending a packet from the one or more ONU/ONTs to the corresponding virtual OLT unit;
• and
• a backhaul interface unit connected with one or more access edge nodes or carrier equipments via an Aggregation Network, for sending a packet processed by the virtual OLT unit to the access edge node or the carrier equipment corresponding to the virtual OLT unit;
• wherein the virtual OLT unit comprises:
• a Dynamic Host Configuration Protocol (DHCP) relay or proxy sub-unit for supporting DHCP relay function, wherein access loop identifier information is carried via DHCP;
• an Authenticator/Authentication, Authorization and Accounting (AAA) proxy sub-unit for supporting authentication function;
• an Internet Group Management Protocol (IGMP) proxy/snooping sub-unit for snooping on a multicast destination IP address and/or a multicast source IP address of an IGMP packet so as to configure respective multicast media access control address filter;
• and
• a flow classification and Quality of Service (QoS) mapping sub-unit for packet flow classification and QoS type identifying.

An Optical Access Network (OAN) comprising an Optical Network Unit (ONU), and one or more Optical Line Terminals (OLTs);

• wherein the ONU comprises:
• at least two logic-independent virtual ONUs each adapted to process a packet based on a respective pre-configured protocol, wherein a first virtual ONU of the at least two virtual ONUs is configured to perform PPP over ATM (PPPoA)-based forwarding and ATM Passive Optical Network (PON) adaptation;
• wherein a second virtual ONU of the at least virtual ONUs is configured to perform PPP over Ethernet (PPPoE)-based forwarding and Ethernet PON adaptation;
• a user interface unit connected with one or more Customer Premises Equipments (CPEs) via at least one of a Digital Subscriber Line (DSL), an Ethernet Line and a Power Line Communication Line, for processing Physical Layer and Data Link Layer of the at least one of DSL, the Ethernet Line and the Power Line Communication Line, and for sending a packet from the one or more CPEs to a corresponding virtual ONU;
• and
• a first Optical Distribution Node interface unit connected with the one or more OLTs via an Optical Distribution Node (ODN) for sending a packet processed by the virtual ONU to an OLT corresponding to the virtual ONU.

An Optical Access Network (OAN) comprising an Optical Line Terminal (OLT) and a plurality of Optical Network Units (ONUs) connected to the OLT via Optical Distribution Node (ODN);

• wherein the OLT comprises:
• at least two logic-independent virtual OLT units adapted to process a packet based on a respective pre-configured protocol, wherein different virtual OLT units are capable of corresponding to different Network Service Providers (NSPs);
• and
• an Optical Distribution Node interface unit connected through the ODN to the one or more ONUs for processing Physical Layer and Data Link Layer of a Passive Optical Network (PON), and for sending a packet from a certain ONU to a corresponding virtual OLT unit;
• wherein the corresponding virtual OLT unit comprises:
• a Dynamic Host Configuration Protocol (DHCP) relay sub-unit for supporting DHCP relay function, wherein access loop identifier information is carried via DHCP;
• an Internet Group Management Protocol (IGMP) proxy/snooping sub-unit for snooping on a multicast destination IP address and/or a multicast source IP address of an IGMP packet so as to configure respective multicast media access control address filter;
• and
• a flow classification and Quality of Service (QoS) mapping sub-unit for packet flow classification and QoS type identifying.

An access network device, comprising:

• at least two logic-independent virtual access units adapted to process a packet based on a respective pre-configured protocol;
• a customer interface unit connected with one or more customer devices for processing Physical Layer and Data Link Layer of an access network, and for sending a packet from the one or more customer devices to the corresponding virtual interface unit;
• and
• a backhaul interface unit connected with one or more access edge nodes or carrier equipments via an Aggregation Network, for sending a packet processed by the virtual interface unit to the access edge node or the carrier equipment corresponding to the virtual interface unit;
• wherein the virtual access unit comprises:
• an Internet Group Management Protocol (IGMP) proxy/snooping sub-unit for snooping on a multicast destination IP address and/or a multicast source IP address of an IGMP packet so as to configure respective multicast media access control address filter.