Wireless Device Serving Cell Activation Timing Offset
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Solution Overview
Problem
Existing methods for serving cell activation and deactivation in wireless communications, particularly in the New Radio (NR) standard, face challenges when dealing with different numerologies and deactivation timers, leading to inaccurate timing and potential system inefficiencies.
Innovation Solution
The proposed solution involves determining a time offset based on the subcarrier spacing configurations of different physical channels to accurately synchronize serving cell activation and deactivation procedures. This includes using a scaling factor to normalize numerology differences and applying distinct time offsets for explicit deactivation commands and timer-expired deactivations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single time offset is used for serving cell activation and deactivation across different numerologies, then the procedure is simplified, but timing accuracy deteriorates due to numerology mismatches
Solution Approach 1:
The patent applies local quality by determining separate time offsets for different numerologies. Specifically, when the first numerology (used for activation command) differs from the second numerology (used for HARQ-ACK), the patent calculates a scaled time offset that accounts for the numerology difference, ensuring accurate timing localization for each numerology context rather than using a single universal offset.
Solution Approach 2:
The patent changes the time offset parameter based on numerology conditions. When numerologies match, a standard time offset is used; when they differ, a scaled time offset is applied. This dynamic parameter adjustment resolves the contradiction by adapting the timing parameter to the specific numerology context, maintaining both procedural simplicity and timing accuracy.
2Productivity
If serving cell deactivation is performed without considering numerology differences, then the procedure is faster, but system reliability deteriorates due to timing errors
Solution Approach 1:
The patent applies preliminary action by determining the appropriate time offset (scaled or standard) before executing the deactivation procedure. The system evaluates whether numerologies match in advance and pre-calculates the correct time offset, ensuring that the subsequent deactivation action occurs at the precise timing required for reliable system operation without sacrificing speed.
3Measurement precision
If different time offsets are calculated for each numerology combination, then timing precision is improved, but computational complexity increases
Solution Approach 1:
The patent applies dynamics by making the time offset calculation adaptive rather than static. The system dynamically selects between standard and scaled time offsets based on the numerology matching condition. This dynamic approach maintains high precision when needed while avoiding unnecessary computational complexity when numerologies match, resolving the contradiction between precision and complexity.
Data Source
AI summary
A method, system and apparatus are disclosed. According to one or more embodiments, a method is performed by a wireless device The method includes: determining an activation or a deactivation of a first serving cell associated with a first physical channel; sending a corresponding Hybrid Automatic Repeat reQuest, HARQ, acknowledgment, ACK, in a second physical channel, a subcarrier spacing configuration of the first physical channel being different from a subcarrier spacing of the second physical channel; and performing a procedure related to the first serving cell based at least in part on a time offset, k, the time offset, k, being based at least in part on a reference physical channel.