Cell Selection Using Beam Count Offset
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication devices in wireless systems face challenges in performing cell selection or reselection procedures effectively when dealing with multiple beams, as current methods only consider cell quality without accounting for the number of beams.
Innovation Solution
A communication device that measures power values for multiple beams, determines an average cell quality value, and adjusts this value with an offset based on the number of beams to perform cell selection or reselection procedures, considering both quality and quantity of beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cell selection is performed based only on cell quality, then the selection process is simple, but the accuracy of cell selection deteriorates when multiple beams belong to the cell
Solution Approach 1:
The patent changes the parameter used for cell selection from only cell quality (RSRP/RSRQ) to a composite parameter that includes both cell quality and the number of beams. The network configures a threshold for the number of beams, and the UE compares this threshold with the actual number of beams to determine whether to select the cell, thereby improving selection accuracy without excessive complexity
Solution Approach 2:
The patent introduces an intermediary mechanism where the network provides configuration information (threshold for number of beams) to the UE. This intermediary parameter mediates between the simple quality-based selection and the more accurate but complex multi-beam assessment, enabling balanced decision-making
2Reliability
If the number of beams is considered in cell quality derivation, then cell selection accuracy improves, but the complexity of the selection procedure increases
Solution Approach 1:
The patent modifies the cell quality assessment by introducing an additional parameter (number of beams) that the UE measures and compares against a network-configured threshold. This parameter change enhances reliability by ensuring cells with sufficient beam diversity are selected, while the threshold-based approach keeps the procedure manageable
Solution Approach 2:
The patent segments the cell selection criteria into two independent components: cell quality (RSRP/RSRQ) and number of beams. The UE evaluates both components separately and combines them through logical operations, making the complex selection process more structured and manageable
3Measurement precision
If multiple beam measurements are performed, then cell quality assessment becomes more accurate, but the measurement and processing time increases
Solution Approach 1:
The patent applies partial action by having the UE measure and consider only the necessary number of beams (up to a configured threshold) rather than exhaustively analyzing all possible beams. This partial measurement approach achieves sufficient accuracy while reducing the time and computational resources required
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A communication device for handling a cell selection procedure or a cell reselection procedure comprises a storage device and a processing circuit, coupled to the storage device. The storage device stores, and the processing circuit is configured to execute instructions of: measuring a plurality of power values corresponding to a plurality of beams of a cell; determining a first cell quality value according to an average of the plurality of power values; determining an offset value according to a number of the plurality of beams corresponding to the plurality of power values; determining a second cell quality value according to the first cell quality value and the offset value; and performing the cell selection procedure or the cell reselection procedure according to the second cell quality value.