Tuple-Based Stateful Explicit Paths for Reliable IP Routing
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Solution Overview
Problem
Existing communication technologies in IP networks lack efficient methods to support stateful explicit paths, which are crucial for ensuring reliable and resource-efficient packet routing, particularly in scenarios requiring strict Quality of Service (QoS) or Service Level Agreements (SLAs).
Innovation Solution
Implementing a system where packets are routed along a path identified by a unique tuple including the first and second IP addresses and a path identifier, with state information mapping the tuple to the next hop, allowing nodes to maintain and manage path states for resource reservation and error handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stateful explicit paths are implemented with state information mapping tuples to next hops, then packet delivery reliability is improved, but device complexity increases
Solution Approach 1:
The path identification is segmented into tuples containing source IP address, destination IP address, and path identifier. This segmentation allows nodes to manage state information in a structured manner, mapping each tuple to its corresponding next hop, thereby improving reliability without overwhelming complexity
Solution Approach 2:
State information is pre-established at nodes through path setup messages that define the complete path before packet transmission. This preliminary action ensures that when packets arrive, the next hop is already determined, improving delivery reliability while keeping runtime complexity low
2Reliability
If path states are dynamically managed for resource reservation, then Quality of Service is improved, but loss of time increases
Solution Approach 1:
Resource reservation and path state management are performed in advance through path setup messages exchanged between nodes before actual packet transmission. This ensures QoS requirements are met while minimizing time loss during data packet forwarding, as the path is pre-established
Solution Approach 2:
The path setup and resource reservation processes are extracted as separate preliminary operations from the main packet forwarding path. This allows QoS to be configured independently without impacting real-time packet transmission performance
3Measurement precision
If unique path identifiers are assigned to paths, then path identification precision is improved, but loss of information increases
Solution Approach 1:
The path identifier is nested within a tuple structure that also includes source and destination IP addresses. This nested organization allows precise path identification while efficiently packaging the information, minimizing the overall header overhead compared to separate fields
Data Source
AI summary
Various example embodiments for supporting stateful explicit paths are presented herein. Various example embodiments for supporting stateful explicit paths may be configured to support communication of a packet along a path in an Internet Protocol (IP) network from a first node to a second node, wherein the path includes a set of hops, wherein the packet includes a tuple configured to identify the path, wherein the tuple includes a first IP address of the first node, a second IP address of the second node, and a path identifier of the path, wherein the path identifier of the path is a unique identifier assigned to the path, wherein the communication of the packet along the path from the first node to the second node is supported based on state information configured to map the tuple to a next hop in the set of hops of the path.