Channelized ODUflex Variable Tributary Slot Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional Optical Transport Network (OTN) systems face inefficiencies in mapping low-rate signals due to fixed-sized Tributary Slots (TSs), leading to wasted bandwidth and increased complexity, especially when handling low-rate clients like Fast Ethernet and 2.5 Gigabit Ethernet, which do not align efficiently with existing OTN structures.
Innovation Solution
The implementation of a channelized Optical Channel Data Unit flexible (ODUflex) system that supports a variable number of TSs and sizes, allowing for efficient multiplexing and mapping of low-rate signals into higher-order OTUk/Cn units using flexible mapping procedures, including Bit-synchronous Mapping Procedure (BMP) and Generic Mapping Procedure (GMP), with Software Defined Networking (SDN) management for dynamic resizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed-sized Tributary Slots (TSs) are used in conventional OTN systems, then the system structure is simple and stable, but mapping efficiency deteriorates and bandwidth is wasted when handling low-rate signals
Solution Approach 1:
The patent implements dynamic TS allocation where the number and size of Tributary Slots are no longer fixed but can be flexibly adjusted based on the actual client signal rate requirements. This allows the system to adaptively optimize mapping efficiency for different signal types while maintaining manageable complexity through structured flexibility.
Solution Approach 2:
The invention changes the parameters of TS configuration from fixed values to variable parameters that can be dynamically set according to client signal characteristics. This enables the system to match TS sizes to actual bandwidth needs, eliminating the bandwidth waste that occurs with fixed-sized slots.
2Adaptability or versatility
If additional aggregation equipment and management layers are added to handle low-rate signals, then signal aggregation capability is improved, but system complexity and cost increase
Solution Approach 1:
The patent makes the OTN system universally capable of handling both low-rate and high-rate signals through the same infrastructure by implementing flexible TS configuration. This eliminates the need for separate aggregation equipment for different signal types, as the same system can adapt to various signal rates through parameter adjustment rather than hardware addition.
3Loss of energy
If fixed-sized TSs are used, then system implementation is easier, but bandwidth utilization deteriorates when mapping low-rate clients
Solution Approach 1:
The system transitions from static TS configuration to dynamic TS allocation, where the number and size of slots are adjusted in real-time based on client signal characteristics. This dynamic approach minimizes bandwidth wastage by ensuring that TS resources closely match actual signal requirements while maintaining ease of operation through automated configuration.
Solution Approach 2:
The patent implements self-service mechanisms where the system automatically configures TS parameters based on detected client signal rates, eliminating manual intervention. This self-configuration capability reduces bandwidth wastage through optimal resource matching while keeping the system easy to operate by removing complex manual setup requirements.
Data Source
AI summary
Systems and methods to provide a channelized Optical channel Data Unit flexible (ODUflex) include receiving a signal; multiplexing the signal into a Tributary Slot (TS) of the channelized ODUflex, wherein the channelized ODUflex supports a variable number of TSs and a variable size; and mapping the channelized ODUflex into an Optical channel Transport Unit k/Cn (OTUk/Cn)(k=1, 2, 3, 4), (n=1, 2, 3, . . . ). A network element configured to operate in an OTN network includes one or more ports coupled to switching circuitry, wherein a first port is configured to receive a signal, wherein the switching circuitry is configured to multiplex the signal into a TS of a channelized ODUflex, wherein the channelized ODUflex supports a variable number of TSs and a variable size (rate), and wherein a second port is configured to map the channelized ODUflex into an OTUk/Cn.