HO OTUflex Bandwidth Allocation for Optical Spectrum
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Solution Overview
Problem
Current Optical Transport Networks (OTNs) face inefficiencies in optical spectrum resource utilization due to fixed rate levels, leading to waste and inflexible adaptation to changes in bandwidth allocation, as they occupy equal 50 GHz intervals regardless of service traffic volume or transmission distance.
Innovation Solution
A method and apparatus for allocating optical spectrum bandwidth resources by constructing a bandwidth-adjustable higher order optical channel transmission unit (HO OTUflex) based on customer service data and base OTUbase bandwidth, allowing flexible mapping and modulation to match varying bandwidth demands, thereby optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed rate levels (OTU1, OTU2, OTU3, OTU4) are used to adapt optical spectrum bandwidth resources, then the system maintains simplicity in resource allocation, but it cannot flexibly adapt to changes in bandwidth requirements, leading to inefficient utilization of optical spectrum resources
Solution Approach 1:
The patent implements dynamic bandwidth allocation by introducing a bandwidth adjustment mechanism that allows the optical channel transmission unit to flexibly change its bandwidth based on actual service requirements. The system dynamically selects from multiple bandwidth modes (e.g., 50GHz, 100GHz, 200GHz) rather than being locked into fixed rate levels, enabling real-time adaptation to traffic variations while maintaining system manageability through standardized adjustment procedures
Solution Approach 2:
The patent changes the fundamental parameter of bandwidth allocation from fixed discrete rate levels to flexible continuous bandwidth adjustment. By introducing a bandwidth adjustment unit that can modify the spectral width of optical channels based on service demands, the system transitions from rigid parameter settings to dynamic parameter optimization, allowing precise matching of bandwidth to actual needs without changing the underlying transmission infrastructure
2Loss of energy
If 2.5G OTU1 or 10G OTU2 always occupies 50 GHz optical spectrum bandwidth resources, then the system ensures consistent resource allocation, but it leads to waste and inefficient utilization of optical spectrum bandwidth resources
Solution Approach 1:
The patent applies local quality optimization by allowing different optical channels to have different bandwidth allocations based on their specific service requirements. Instead of uniformly allocating 50GHz to all channels regardless of need, the system enables each channel to be configured with appropriate bandwidth (50GHz, 100GHz, 200GHz, etc.) matched to its actual traffic load, thereby eliminating spectral waste while maintaining allocation stability through standardized configuration management
Solution Approach 2:
The patent introduces dynamic bandwidth adjustment that allows optical channels to transition between different bandwidth modes based on real-time service demands. This dynamic capability enables the system to scale bandwidth usage up or down as needed, preventing both over-provisioning (waste) and under-provisioning (insufficient capacity), while maintaining reliable operation through controlled transition mechanisms and standardized protocols
3Adaptability or versatility
If fixed rate levels are used in OTN, then the system maintains ease of operation, but it cannot adapt to changes in service traffic volume and transmission distance, leading to inefficient resource utilization
Solution Approach 1:
The patent implements dynamic bandwidth adaptation that allows the optical network to automatically adjust bandwidth allocation based on service traffic volume and transmission distance requirements. The system incorporates bandwidth adjustment units that can modify channel spectral width in response to changing demands, enabling seamless adaptation to varying service conditions while maintaining operational simplicity through automated control mechanisms and standardized adjustment procedures
Solution Approach 2:
The patent creates a universal bandwidth allocation framework that can handle diverse service types (different traffic volumes, transmission distances, and service requirements) through a single flexible system. The bandwidth adjustment mechanism serves multiple functions: allocating bandwidth for different service sizes, adapting to various transmission distances, and optimizing resource utilization across the entire network, thereby replacing multiple fixed-rate systems with one multi-functional platform
Data Source
AI summary
Embodiments of the present invention provide a method and an apparatus for allocating optical spectrum bandwidth resources. The method includes: first determine bandwidth of an OTUbase according to optical-layer frequency grid bandwidth and carrier spectrum efficiency; then construct an HO OTUflex according to bandwidth of customer service data and the bandwidth of the OTUbase, bandwidth of the HO OTUflex is a first integer multiple of the bandwidth of the OTUbase; map the customer service data into a payload area of the HO OTUflex and encapsulate overhead information; at last, modulate the HO OTUflex that carries the customer service data to a second integer number of optical channel carriers. The embodiments of the present invention apply to a scenario where customer service data is transported.