Cell Selection via Stored SCS Profiles in 5G Networks
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Solution Overview
Problem
In 5G or New Radio (NR) mobile communications, blind detection of subcarrier spacing (SCS) configurations is inefficient and time-consuming, leading to degraded user experience due to multiple candidate configurations for initial access.
Innovation Solution
Implementing a method where user equipment (UE) determines the frequency band and SCS configuration by checking a stored profile, prioritizes Public Land Mobile Network (PLMN) lists based on location, and selects a cell using a valid SCS configuration or alternative radio access technologies when none are available, thereby optimizing cell selection and reselection processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If blind detection is used to determine SCS configuration among multiple candidates, then the UE can support multiple frequency bands, but the cell selection time increases and user experience degrades
Solution Approach 1:
The patent applies preliminary action by pre-storing SCS configuration profiles in the UE memory before actual cell selection. The profiles contain pre-configured SCS values for different frequency bands, allowing the UE to quickly retrieve and apply the correct configuration without performing blind detection during cell selection, thus reducing cell selection time while maintaining multi-band support capability
2Adaptability or versatility
If blind detection is performed to identify SCS configuration, then the UE can adapt to different networks, but power consumption increases
Solution Approach 1:
The patent reduces power consumption by performing the SCS configuration determination action in advance and storing the results in profiles. During actual cell selection, the UE simply retrieves pre-determined configurations from memory rather than performing energy-intensive blind detection, thereby maintaining network adaptation capability while significantly lowering power consumption during mobile operation
Solution Approach 2:
The UE uses its own stored profiles and memory resources to self-determine the correct SCS configuration without needing to perform extensive measurements or receive detailed configuration information from the network, making the power-intensive task of configuration determination self-serviced through pre-computed profiles
3Adaptability or versatility
If multiple SCS configurations are supported, then the system can accommodate different frequency bands, but the complexity of cell selection procedure increases
Solution Approach 1:
The patent simplifies the cell selection procedure by pre-determining and storing the mapping between frequency bands and SCS configurations in profiles. This preliminary action eliminates the need for complex blind detection algorithms and multiple hypothesis testing during cell selection, reducing procedural complexity while maintaining support for multiple frequency bands with different SCS configurations
Data Source
AI summary
Various examples and schemes pertaining to enhanced cell selection mechanisms in mobile communications are described. A user equipment (UE) performs a cell selection or reselection procedure to select a cell of a wireless network and establishes a wireless connection with the selected cell. In performing the cell selection or reselection procedure, the UE determines a frequency band and a subcarrier spacing (SCS) configuration by checking a profile, and the UE performs the cell selection or reselection procedure in the frequency band based on the SCS configuration.