OLT Centralized Control of ONU User Ports in xPON Networks
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Solution Overview
Problem
In xPON networks, identifying user ports on the Optical Network Unit (ONU) is crucial for centralized control of IPTV services, but existing methods, such as adding CVLAN to IGMP Join packets, result in inflexible networking and compatibility issues between different manufacturers' ONU and Optical Line Terminal (OLT) interfaces.
Innovation Solution
The method utilizes user port information carried by PPPOE+ and DHCP Option82 protocols to enable the OLT to identify and centrally control user ports on the ONU by acquiring, storing, and querying media access control (MAC) address database information, allowing for flexible and compatible IPTV service management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CVLAN is added to the IGMP Join packet at the ONU for identifying the user port, then the OLT can identify the user port of ONU, but networking becomes inflexible and compatibility problems occur between ONU and OLT from different manufacturers
Solution Approach 1:
The patent introduces an intermediary mechanism by utilizing existing protocol fields (PPPOE session ID or DHCP transaction ID) that already traverse the network, rather than modifying IGMP packets directly. These intermediary identifiers serve as mediators that link user ports to IPTV services without requiring protocol modifications at the ONU, thereby maintaining compatibility while achieving accurate identification.
Solution Approach 2:
The patent makes the identification mechanism universal by using standardized protocol fields (PPPOE session ID, DHCP transaction ID) that are already present in common network protocols. This multi-functional approach allows the same mechanism to work across different manufacturers' equipment and various network configurations without requiring vendor-specific implementations.
2Adaptability or versatility
If user port information is carried by PPPOE+ and DHCP Option82 protocols, then centralized control of IPTV service is achieved with better compatibility, but additional protocol processing steps are required
Solution Approach 1:
The patent applies self-service by leveraging protocol fields (PPPOE session ID, DHCP transaction ID) that are already being processed and carried by the network infrastructure. The existing authentication and address allocation mechanisms automatically include these identifiers, eliminating the need for separate user port information collection processes and reducing overall system complexity.
Solution Approach 2:
The patent performs preliminary action by capturing user port information during the initial PPPOE authentication or DHCP address allocation phase, before IPTV service activation. This early capture ensures the identifier is already available in the OLT's database when IPTV service requests are processed, avoiding additional processing steps during service delivery.
Data Source
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AI summary
A method and device for centralized controlling IPTV service are disclosed. Said method includes the following steps: step 1, when a user initiates a service interaction, the optical network unit (ONU) acquires user port information of the user, puts the user port information into an interacting allocation protocol package and sends said package to the optical line terminal (OLT); step 2, the OLT extracts the user port information according to the received interacting allocation protocol package, and generates opposite end associated information according to the user port information; step 3, the OLT stores the generated information into the MAC address database using the data package identifier as index; and step 4, upon receiving an IPTV service request package sent by the user port of the OLT, the OLT queries said MAC address database to abtain the user port information according to the data package identifier, and thus the centralized control to the user ports on the ONU side by the OLT is realized.