Releasing Dedicated Cell Selection Info for UE State Transitions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
User equipment (UE) often selects sub-optimal cells due to dedicated cell-selection information that is not appropriately configured for different geographical locations and resource control states, leading to inadequate communication performance.
Innovation Solution
The UE is designed to release dedicated cell-selection information while transitioning between resource control states, allowing it to select an optimal cell by using common cell-selection information in subsequent procedures, independent of the previously provided biased information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the network provides dedicated cell-selection information to the UE, then the likelihood of selecting a given cell or type of cell is increased, but the UE may select a sub-optimal cell that does not achieve target communication performance
Solution Approach 1:
The patent applies dynamics by making the cell-selection information state-dependent. The UE behavior changes based on its current RRC state (connected, inactive, or idle). Dedicated cell-selection information is released when transitioning from connected to inactive or idle state, allowing the system to adapt the information retention policy dynamically based on operational context rather than using a static approach.
Solution Approach 2:
The patent changes the parameter of information retention by releasing dedicated cell-selection information upon state transition. This parameter change (from retaining to releasing information) is triggered by the RRC state change, allowing the system to optimize cell selection behavior for different operational states and avoid sub-optimal selections that would occur with continuous retention of biased information.
2Device complexity
If the UE retains dedicated cell-selection information when transitioning between resource control states, then the cell selection process is simplified, but the information may not be appropriate for the new state or geographical location
Solution Approach 1:
The patent implements dynamics by making the cell-selection information retention policy dependent on the RRC state. The UE dynamically adjusts its cell selection behavior based on whether it is in connected, inactive, or idle state. This dynamic approach allows the system to balance complexity and adaptability by releasing dedicated information in states where it may not be appropriate while maintaining it in states where it provides benefit.
3Loss of time
If the UE uses biased cell-selection information from previous states, then the cell selection process is faster, but the selected cell may not be optimal for the current geographical location and state
Solution Approach 1:
The patent applies dynamics by making the cell-selection information retention policy state-dependent. The UE releases dedicated cell-selection information when transitioning to inactive or idle state, allowing it to perform unbiased cell selection in these states. This dynamic approach ensures that the time-performance tradeoff is optimized for each state, preventing sub-optimal selections that would occur with continuous use of biased information.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
This document describes techniques and apparatuses for releasing information to improve cell selection in different resource control states. To improve communication performance, a user equipment (UE) 110 releases dedicated cell-selection information 306, which may not be appropriate as the UE 110 moves to different geographical locations and transitions to different resource control states 218. Different situations cause the UE 110 to release the dedicated cell-selection information 306, including performing a cell‑selection procedure in an inactive state that selects another cell that does not support the inactive state, processing a paging message 308, or transitioning from the inactive state to an idle state. By releasing the dedicated cell-selection information 306, the UE 110 performs a future cell-selection procedure without relying on the dedicated cell-selection information. As a result, the UE 110 can select an optimal cell for achieving a target communication performance in different resource control states 218.