Cell Clock Accuracy Signaling for Precise UE Target Selection
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Solution Overview
Problem
Communication networks face challenges in achieving precise clock synchronization for delay-sensitive services, requiring a compromise between clock accuracy and radio resource consumption, necessitating improved methods for UE to acquire and select cells with suitable clock accuracy.
Innovation Solution
A message sending method and target cell selecting method that involve sending and receiving clock information and accuracy, including minimum granularity, invalid bits, and precise synchronization support, allowing UEs to select cells that meet service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If higher clock synchronization accuracy is required for delay-sensitive services, then delay accuracy is improved, but radio resource consumption increases
Solution Approach 1:
The patent changes the parameter of clock accuracy information representation by introducing multiple granularity levels (e.g., different bit precisions like 48-bit, 64-bit, 128-bit timestamps) and accuracy indicators. This allows the system to adaptively select appropriate clock accuracy levels based on service requirements, avoiding unnecessary high-precision clock synchronization for services that don't require it, thus reducing radio resource consumption while maintaining adequate delay accuracy for delay-sensitive services.
2Adaptability or versatility
If UE acquires detailed clock information and accuracy of all cells, then network selection capability is improved, but information processing complexity increases
Solution Approach 1:
The patent extracts only the essential clock accuracy information needed for network selection from complete cell information. Instead of requiring UE to process all detailed clock parameters of all cells, the system extracts and transmits only the relevant accuracy indicators (such as clock accuracy level, granularity, and support for precise synchronization) that are sufficient for making network selection decisions. This reduces information processing complexity while maintaining adequate network selection capability.
Solution Approach 2:
The patent segments clock information into different levels of detail and relevance. Clock accuracy information is divided into essential selection criteria (accuracy level, granularity, precision support) and optional detailed parameters. UE can acquire and process only the segmented essential information for basic network selection, while detailed information is available only when needed, thereby reducing overall information processing complexity.
3Reliability
If different cells provide varying clock accuracy, then service quality is improved, but network selection complexity increases
Solution Approach 1:
The patent introduces standardized parameter changes by defining uniform clock accuracy indicators and granularity levels that different cells can report. This standardization allows UE to compare clock accuracy across different cells using consistent parameters, simplifying the network selection process despite varying actual clock accuracies provided by different cells. The standardized parameters enable automated selection algorithms to efficiently identify suitable cells without complex manual evaluation.
Data Source
AI summary
The present disclosure provides message sending methods and devices, and target cell selecting methods and devices. One message sending method includes: sending a first message, which carries at least one of clock information and clock accuracy of a cell, to a User Equipment (UE), where the clock accuracy includes at least one of minimum granularity of clock synchronization, a total number of invalid bits of clock synchronization cell, and indication information which indicates whether to support precise clock synchronization.