Virtualized Passive Optical Network for Diverse Service Scenarios
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Solution Overview
Problem
Conventional passive optical networks (PONs) face limitations in handling different application scenarios, such as residential and enterprise access, due to their design, leading to increased investment costs and complex operation and maintenance, especially when trying to meet requirements like low delay and high bandwidth for wireless backhaul.
Innovation Solution
A method and apparatus for virtualizing a passive optical network, allowing for the creation of a virtualized PON using a VPON ID and λ-flow ID to establish communication connections between optical network units and line terminals, enabling flexible networking and software-defined operation modes to meet various service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different PON systems are used for different application scenarios (residential, enterprise, wireless backhaul), then service requirements are met, but investment costs increase and operation maintenance complexity increases
Solution Approach 1:
The patent implements a universal PON system that can serve multiple application scenarios (residential broadband, enterprise access, wireless backhaul) through a single infrastructure. The OLT is designed to support multiple service types simultaneously, with configurable bandwidth allocation and QoS parameters that adapt to different service requirements, eliminating the need for separate TDM-PON, WDM-PON, or P2P systems for different scenarios
Solution Approach 2:
The system employs dynamic bandwidth allocation and configurable QoS parameters that can be adjusted in real-time based on service type and network conditions. The OLT can dynamically switch between TDMA-based time division multiplexing for residential users and wavelength-based allocation for enterprise or backhaul services, allowing the same physical infrastructure to adapt to different operational requirements
2Productivity
If TDM-based PON is used for residential broadband access, then bandwidth statistical multiplexing gain is achieved, but security and reliability problems occur for enterprise access
Solution Approach 1:
The patent applies different access methods to different user groups within the same PON system. Residential users continue to benefit from TDMA-based statistical multiplexing for cost-effective broadband access, while enterprise users are allocated dedicated wavelength channels or dedicated time slots with guaranteed bandwidth, providing enhanced security and reliability for sensitive enterprise traffic without affecting residential service efficiency
3Speed
If WDM-PON with low delay is used for wireless backhaul, then precise time synchronization and large exclusive bandwidth are achieved, but the system cannot serve residential users
Solution Approach 1:
The patent segments the PON system into different service domains within the same physical infrastructure. Wireless backhaul services are allocated specific wavelength channels with guaranteed low delay characteristics and precise time synchronization, while other wavelength channels or time slots serve residential broadband users. This segmentation allows the system to provide specialized performance for backhaul while maintaining general-purpose capability for residential access
Data Source
AI summary
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.