Session Control Device With Preconfigured UPF Downlink Handling
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Solution Overview
Problem
In 5G communication systems, data transmission delays occur due to signaling processing being slower than the data transmission rate, particularly in cloud/edge environments, leading to additional data transmission delays through network-triggered service requests.
Innovation Solution
A session control device identifies specific UEs with downlink data before control plane path generation is complete, generating information to avoid additional signaling between the user plane and control plane, and configures network functions to either transmit data through existing paths or buffer data until control plane generation is complete.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If downlink data is transferred to UPF during CP path (re)generation signaling, then data transmission speed is improved, but additional network-triggered service request signaling is induced causing data transmission delay
Solution Approach 1:
The patent applies preliminary action by configuring the UPF in advance with information about UEs that may generate downlink data before CP path generation is complete. This allows the UPF to proactively prepare for potential data transmission scenarios, preventing the need for additional network-triggered service request signaling later. The UPF is pre-configured with UE identifiers and handling instructions, enabling it to directly transmit downlink data without inducing extra signaling procedures.
2Reliability
If signaling processing is performed at normal speed, then control plane path generation is completed, but data transmission delay occurs because signaling is slower than data transmission rate
Solution Approach 1:
The patent applies preliminary action by performing UPF configuration in advance, before CP path generation signaling is complete. The network controller configures the UPF with necessary information about potential downlink data scenarios during the signaling process, rather than waiting for signaling completion. This allows data transmission to proceed without waiting for the slower signaling process to finish.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network controller provides specific configuration information to the UPF about UEs that may generate downlink data. This intermediary configuration acts as a bridge between the control plane signaling process and the user plane data transmission, enabling the UPF to handle data independently without being blocked by the slower signaling processing speed.
3Reliability
If additional network-triggered service request procedure is performed, then downlink data can be transmitted, but device complexity and signaling overhead increase
Solution Approach 1:
The patent applies the taking out principle by extracting and eliminating the unnecessary network-triggered service request signaling procedure. By configuring the UPF in advance with information about potential downlink data scenarios, the system removes the need for the UPF to induce additional service request signaling when downlink data arrives. This extracts the harmful redundant signaling from the data transmission process while maintaining reliable downlink delivery.
Data Source
AI summary
The present invention proposes a method capable of minimizing data transmission latency by implementing a specific technical feature of avoiding additional latency of data transmission due to an additionally performed network triggered service request procedure in a situation where signaling processing is delayed compared to a data transmission rate.