Conditional Cell Release for 5G URLLC Latency
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Solution Overview
Problem
Current mobile communication networks face latency issues in conditional PSCell release procedures, leading to data interruptions in URLLC services due to time-consuming signaling and lack of instantaneous measurement results, particularly in 5G and 5G+ networks.
Innovation Solution
A method and apparatus that enable a mobile device to determine and execute conditional cell release based on pre-configured conditions without requiring high-latency signaling, allowing immediate action upon meeting the release criteria, thereby reducing the need for further signaling between the device and the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network performs traditional PSCell release procedure with signaling exchange, then the release can be controlled by the network, but the latency increases and data interruption occurs
Solution Approach 1:
The network pre-configures the UE with conditional cell release information including release conditions and target cell configurations before the actual release is needed. When the pre-configured conditions are met, the UE can immediately execute the release and access the target cell without waiting for network signaling, thus reducing latency while maintaining network control through the pre-configured parameters
Solution Approach 2:
The UE is empowered to autonomously determine whether release conditions are met and to self-execute the cell release procedure based on pre-configured instructions from the network. This self-service mechanism allows the UE to perform the release locally without waiting for network confirmation, significantly reducing the time required while ensuring the release follows network-approved parameters
2Reliability
If the UE waits for network signaling to release the cell, then the network maintains control, but the service continuity is broken causing data interruption
Solution Approach 1:
The network provides the UE with pre-configured release information including alternative cell configurations before the release is triggered. This preliminary configuration ensures that when the UE needs to release a cell, it can immediately switch to a pre-approved alternative without waiting for network signaling, thus maintaining service continuity while eliminating signaling delays
Solution Approach 2:
The pre-configured release information acts as an intermediary that carries network control decisions in advance. Instead of real-time signaling, the network embeds its release decisions and target cell selections in pre-configured parameters that the UE executes locally, serving as a mediator that maintains network control while enabling fast UE-side execution
3Productivity
If the network uses BSR for UL transmission management, then resource allocation is optimized, but the response time increases due to cross-layer interaction
Solution Approach 1:
The patent extracts the cell release decision-making authority from the network's higher-layer protocols and places it directly at the UE's physical layer through pre-configured conditions. This extraction eliminates the need for cross-layer BSR interactions for release decisions, enabling immediate response to radio condition changes while maintaining efficient resource allocation through the pre-configured release parameters
Data Source
AI summary
Inter-alia, a method is disclosed comprising: determining conditional cell release information indicative of at least one condition based on which a configured cell of a cell group of a mobile communication network is to be released; and releasing the configured cell based, at least in part, on the conditional cell release information. It is further disclosed an according apparatus, computer program and system.