Network Server Disjoint Channel Establishment
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Solution Overview
Problem
Communications networks face challenges in reliably and efficiently establishing disjoint channels in response to client-layer disjoint path requests, especially when network topology changes or resources become available, which affects the performance and reliability of packet switching technologies.
Innovation Solution
A server-layer network node receives client-layer disjoint path requests and determines disjoint channels based on route information, signaling within the network to establish these channels, ensuring that new paths are created that avoid shared risk link groups and resources associated with existing channels, using optical nodes and packet switching devices to manage and maintain this process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If packet switching technology is used to increase network speed and capacity, then network bandwidth and performance are improved, but network reliability and efficiency in establishing disjoint channels deteriorate
Solution Approach 1:
The network path is segmented into multiple disjoint channels (primary and backup paths) that are independently established through the network. This segmentation allows traffic to be routed through alternative paths when the primary path fails, thereby maintaining reliability while using packet switching for high bandwidth utilization.
Solution Approach 2:
The system performs preliminary actions by pre-establishing backup channels and maintaining route information before failures occur. When a channel failure is detected, the pre-configured backup path can be activated immediately without requiring complex real-time routing decisions, thus ensuring reliable channel establishment while maintaining high network productivity.
2Reliability
If disjoint channels are established to avoid shared failures, then network reliability is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The server-layer network node is designed with multi-functionality, serving both as a routing decision point and a signaling management point. It maintains route information for multiple channels and can perform both primary path establishment and backup path configuration, reducing the need for separate dedicated management devices and thereby controlling complexity while ensuring reliability.
Solution Approach 2:
The patent introduces an intermediary signaling mechanism that mediates between the client-layer disjoint path requests and the server-layer channel establishment. This intermediary layer abstracts the complexity of disjoint path computation and management, allowing the system to maintain high reliability through proper channel management while keeping device complexity contained within standardized signaling protocols.
3Productivity
If dynamic reconfiguration of channels is performed to optimize resource usage, then network efficiency is improved, but signaling time and processing overhead increase
Solution Approach 1:
The system performs preliminary actions by pre-computing and caching route information for potential backup paths before they are needed. This allows the network to quickly switch to optimized resource usage patterns when conditions change, without requiring time-consuming real-time computations, thus improving network efficiency while minimizing signaling time losses.
Solution Approach 2:
The channel configuration is made dynamic, allowing the system to adaptively reconfigure channels based on current network conditions and resource availability. The server-layer node can dynamically adjust the primary and backup path selections to optimize resource usage, while the pre-maintained route information enables these dynamic changes to occur with minimal signaling overhead and processing time.
Data Source
AI summary
In one embodiment, a network server layer provides disjoint channels in response to client-layer disjoint path requests. For example, the network layer can be an optical network, and the client layer may be a packet switching layer (e.g., label switching, Internet Protocol). In one embodiment, a server-layer node receives a client-layer disjoint path request to provide a server-layer channel through a server-layer network. The client-layer disjoint path request includes an identifier corresponding to an existing client-layer path that traverses a current channel through the server-layer network that does not include the server-layer node. The server-layer network determines a particular channel through the server-layer network that is disjoint to the current channel based on route information of the current channel, and then signaling is performed within the server-layer network to establish the particular channel.