Service Path Generation Ensuring Uplink Downlink Consistency
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Solution Overview
Problem
In existing communication technologies, the service path generation method fails to ensure seamless transmission of downlink service flows due to mismatched service devices between uplink and downlink service paths, leading to transmission interruptions.
Innovation Solution
A service path generation apparatus and method that receives a downlink service path request, obtains uplink service path information, and selects a service device identifier from the uplink service path to generate a corresponding downlink service path, ensuring consistency in service device identifiers for both paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If service devices are separately and randomly selected for uplink and downlink service paths, then load sharing is improved, but transmission reliability deteriorates due to TCP connection mismatches
Solution Approach 1:
The patent applies preliminary action by pre-establishing TCP connections on the uplink service path before downlink transmission. The network server stores the mapping relationship between service flow identifiers and service device identifiers obtained during uplink transmission. When downlink service flows need to be transmitted, the pre-established connections and stored mappings enable direct use of the same service devices, eliminating connection mismatches while maintaining load distribution across multiple service devices.
2Reliability
If the same service device is used for both uplink and downlink service paths, then transmission reliability is improved, but device complexity increases due to connection management requirements
Solution Approach 1:
The patent introduces the network server as an intermediary that stores the mapping relationships between service flow identifiers and service device identifiers. This intermediary component centralizes the connection management function, allowing service devices to maintain consistent connections without requiring complex distributed coordination mechanisms. The mapping storage at the network server simplifies the overall system architecture while ensuring reliable transmission.
3Adaptability or versatility
If multiple service devices are deployed for each service type, then system adaptability is improved, but path consistency deteriorates due to random selection
Solution Approach 1:
The patent implements feedback by having the network server store and return the mapping relationships between service flow identifiers and service device identifiers. This feedback mechanism ensures that when downlink service paths are established, the same service devices selected during uplink transmission are automatically reused. The feedback loop maintains path consistency while allowing flexible deployment of multiple service devices for load sharing and system adaptability.
Data Source
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AI summary
The present invention discloses a service path generation method and apparatus, and pertains to the field of communications technologies. The method includes: receiving a downlink service path request sent by a classifier, where the downlink service path request carries an identifier of a downlink service chain; obtaining uplink service path information, and obtaining, according to the uplink service path information, identifiers of service devices on the uplink service path; selecting, from the identifiers of service devices on the uplink service path, an identifier of a service device according to the identifier of the downlink service chain; and generating a downlink service path according to the selected identifier of the service device. The apparatus includes a first receiving module and a first processing module. According to the present invention, for a same service type, it can be ensured that an identifier of a service device on a downlink service path is the same as an identifier of a service device on an uplink service path, thereby ensuring that a downlink service flow can be successfully transmitted.