Passive Optical Network Connection Admission Control via Virtual Port Segmentation
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Solution Overview
Problem
Current connection admission control methods in passive optical networks are limited by using physical PON ports as units, which restrict the management of multiple bandwidth channels and lead to inefficient resource allocation and potential bandwidth wastage.
Innovation Solution
The method involves dividing physical ports into virtual ports or sub-channels, allowing for the management of different bandwidth channels, such as 1G and 10G, without exceeding bandwidth ranges or wasting resources, by establishing correspondence between optical network units and specific virtual or sub-channels, and enabling access based on demand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If physical PON port is used as the unit for connection admission control, then the control implementation is simple, but the management of multiple bandwidth channels is restricted and resource allocation is inefficient
Solution Approach 1:
The patent divides a physical PON port into multiple virtual ports, each corresponding to a specific bandwidth channel (1G or 10G). This segmentation allows the system to manage different bandwidth channels independently while maintaining the simplicity of port-based control. The virtual ports are created through software configuration without requiring physical network upgrades.
2Device complexity
If physical PON port is used as the unit for connection admission control, then the control structure is simple, but the resource allocation efficiency deteriorates
Solution Approach 1:
By segmenting the physical port into virtual ports, the system achieves fine-grained resource allocation without significantly increasing structural complexity. Each virtual port can independently perform CAC operations, improving resource allocation efficiency while maintaining a relatively simple control structure.
Solution Approach 2:
The patent introduces a virtualization dimension to the physical port structure. Instead of only managing ports at the physical level, the system adds a virtual port layer that enables multiple bandwidth channels to be managed within the same physical infrastructure, thereby improving resource allocation efficiency.
3Adaptability or versatility
If physical PON port is used as the unit for connection admission control, then the existing system compatibility is maintained, but the bandwidth channel management capability is limited
Solution Approach 1:
The virtual port segmentation is implemented through software configuration on the OLT, which maintains compatibility with existing network management systems. The physical port structure remains unchanged, ensuring system compatibility while enabling enhanced bandwidth channel management capabilities through the virtualized layer.
Solution Approach 2:
The virtual port mechanism provides multi-functionality by enabling the same physical port to support multiple bandwidth channels (1G and 10G) simultaneously. This universal approach allows the system to adapt to different service requirements without requiring separate physical infrastructure for each bandwidth type.
Data Source
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AI summary
Embodiments of the present invention provide a connection admission control method and apparatus, and a passive optical network system, and the method includes: receiving, by an optical line terminal, a multicast on-demand request sent by an optical network unit, where the multicast on-demand request includes an identifier of the optical network unit and information of a program on-demand; determining, according to the identifier of the optical network unit, a virtual port where the optical network unit is located, or a physical port where the optical network unit is located and a sub-channel where the optical network unit is located; judging whether the program is demanded under the virtual port where the optical network unit is located or under the sub-channel of the physical port where the optical network unit is located; and if a judging result is yes, allowing the optical network unit to access. Connection admission control of different bandwidth channels under a same physical port may be implemented through the embodiments of the present invention, which neither exceeds a bandwidth range, nor wastes resources.