ONT Service Flow Mapping via Message Characteristics
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Solution Overview
Problem
Current GPON systems cannot accurately map Ethernet frames to different service transmission channels based on various message characteristics, such as VLAN ID, DSCP, IP or MAC addresses, and TCP/UDP port numbers, leading to inadequate Quality of Service (QoS) guarantees for sub-divided services and potentially affecting the performance of multicast services due to mixed transmission with low-priority data.
Innovation Solution
A method and system that configure and map service flows to specific service transmission channels in an Optical Network Terminal (ONT) based on message characteristics, using configuration parameters including message characteristics, offset positions, and masks for bitwise operations to determine matching criteria, allowing for precise service classification and QoS management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If service flows are mapped only by 802.1p priorities to GEM PORTs, then the mapping process is simple, but precise service classification and QoS guarantee for sub-divided services cannot be achieved
Solution Approach 1:
The patent segments the service classification process by introducing multiple matching dimensions (VLAN ID, IP address, port number, protocol type) beyond the traditional single 802.1p priority field. Each dimension can be independently configured and matched, allowing fine-grained service classification while maintaining structured processing simplicity.
Solution Approach 2:
The service flow mapping module is designed with multi-functionality to handle various message characteristics (VLAN ID, IP address, port number, protocol type, 802.1p priority) through a unified matching framework. This universal approach enables precise classification across different service types without requiring separate mapping mechanisms for each characteristic.
2Productivity
If control messages are transmitted mixed with data services, then transmission channel utilization is high, but QoS of control messages cannot be guaranteed
Solution Approach 1:
The patent extracts control messages (IGMP, DHCP, PPPoE, SIP) from the mixed data service transmission stream by implementing specific matching rules that identify control message characteristics. Once identified, these messages are routed through dedicated service transmission channels with appropriate QoS parameters, separating them from best-effort data traffic while maintaining efficient channel utilization.
Solution Approach 2:
Different service transmission channels are assigned different QoS characteristics locally. Control message channels receive priority treatment with guaranteed bandwidth and low latency, while data service channels operate with best-effort delivery. This local quality differentiation ensures reliable control message transmission without sacrificing overall channel utilization efficiency.
3Measurement precision
If multiple matching dimensions are implemented for service flow classification, then service classification precision is improved, but device complexity increases
Solution Approach 1:
The service flow mapping module implements dynamic matching that processes message characteristics in a configurable sequence and allows early termination when a match is found. The matching dimensions and their priority order can be dynamically adjusted based on service requirements, enabling precise classification without requiring all dimensions to be evaluated simultaneously, thus reducing operational complexity.
Data Source
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AI summary
A method for mapping a service flow to a service transmission channel includes: configuring determined configuration parameters for a message characteristic into an Optical Network Terminal (ONT); the ONT ensures that the received service flow matches the configured message characteristic; mapping the service flow to a specified service transmission channel. A system and an ONT for mapping the service flow to the service transmission channel are also provided, and the system sets a general service flow mapping module in the ONT. Service flows may be mapped to different service transmission channels based on any predetermined message characteristic by the method, system, and ONT of this invention and it meets the demand of the subdivision service QoS.