Traffic Flow Indication Identifier for Cross-Domain Service Provision
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Solution Overview
Problem
Current methods for providing different services to traffic flows across multiple domains require complex format conversions and redundant encapsulation of flow identifiers, leading to inefficient packet processing.
Innovation Solution
A method where a network device adds an indication identifier to a packet if it matches a traffic flow feature, allowing intermediate nodes to directly identify and process the packet without format conversion, using IPv6 or MPLS packets with encapsulated indication identifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If format conversion and re-encapsulation are performed on flow identifiers when packets are transmitted between different domains, then different services can be provided for traffic flows across domains, but processing complexity increases significantly
Solution Approach 1:
The patent applies a universal processing mechanism where network devices handle packets from different domains using a unified format without requiring domain-specific format conversions. The indication identifier structure is designed to be universally applicable across multiple domains and service types, allowing single-format packets to carry service information through different network domains without transformation
Solution Approach 2:
The patent extracts the service identification function from the flow identifier format itself and separates it into a dedicated indication identifier field. This extracted indication identifier contains service type information that can be independently processed without requiring the entire packet format to be converted, thereby simplifying cross-domain processing while maintaining service differentiation capability
2Adaptability or versatility
If multiple flow identifiers in different formats are encapsulated into packets to provide different services, then comprehensive service support is achieved, but processing efficiency decreases due to redundant encapsulation
Solution Approach 1:
The patent merges multiple service identification functions into a single indication identifier structure. Instead of encapsulating separate flow identifiers for different services, the indication identifier consolidates service type information that can represent multiple service types (OAM, SFC, DetNet) within one unified field, eliminating redundant encapsulation while maintaining comprehensive service support
Solution Approach 2:
The indication identifier is designed as a universal structure that can represent multiple service types through different value combinations or field configurations. This single multi-functional identifier replaces the need for multiple service-specific identifiers, reducing packet overhead and improving processing efficiency while supporting diverse services across domains
Data Source
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AI summary
This application discloses a method and an apparatus for providing a service for a traffic flow. The method includes: A network device receives a first packet; and if a packet feature of the first packet matches a packet feature of the traffic flow, the network device encapsulates an indication identifier of the traffic flow into the first packet to obtain a second packet, and sends the second packet. The second packet is an IPv6 packet or an MPLS packet. The indication identifier of the traffic flow is used to indicate the service provided for the traffic flow. The indication identifier of the traffic flow is encapsulated into the first packet to obtain the second packet. Even if cross-domain transmission needs to be implemented for the second packet, format conversion does not need to be performed on the encapsulated indication identifier, and redundant encapsulation of indication identifiers in a plurality of formats does not need to be performed. The network device in each domain may identify the indication identifier and perform an operation of a corresponding service, to provide the corresponding service.