UE Cell Parameter Determination for Reduced-Bandwidth 5G Bands
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Solution Overview
Problem
Existing 5G communication systems face challenges in efficiently supporting terminals with bandwidths less than 5 MHz, leading to excessive energy consumption and performance loss during initial cell selection due to the inability to decode PBCH and CORESET0 signals, especially in frequency bands with reduced channel bandwidths like n79.
Innovation Solution
A method and apparatus for a user equipment (UE) to determine configuration information for control resource sets (CORESET) by identifying the frequency band, using parameter sets specific to the minimum channel bandwidth, such as 10 MHz for n79, or defaulting to parameter sets based on supported bandwidths like 40 MHz when the band does not match.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal uses default parameter sets based on supported bandwidth (e.g., 40 MHz) for frequency bands with reduced channel bandwidth (e.g., n79 with 10 MHz), then the terminal can maintain compatibility with standard procedures, but the terminal experiences excessive energy consumption and performance loss due to inability to properly decode PBCH and CORESET0 signals
Solution Approach 1:
The patent applies parameter changes by modifying the bandwidth parameter selection based on the specific frequency band characteristics. When the terminal detects it is operating in a frequency band with reduced channel bandwidth (such as n79 with 10 MHz), it changes the bandwidth parameter from the default supported bandwidth (e.g., 40 MHz) to the actual available bandwidth. This parameter adaptation enables proper decoding of PBCH and CORESET0 signals while maintaining compatibility with standard procedures, thereby resolving the contradiction between adaptability and energy consumption.
2Productivity
If the terminal attempts to decode PBCH and CORESET0 signals using incorrect bandwidth assumptions in reduced bandwidth frequency bands, then the terminal can proceed with initial cell selection, but the terminal suffers from performance loss due to decoding failures
Solution Approach 1:
The patent applies preliminary action by having the terminal determine the actual channel bandwidth of the frequency band before attempting to decode PBCH and CORESET0 signals. This preliminary bandwidth identification step ensures that subsequent decoding operations use the correct bandwidth parameters, preventing decoding failures while maintaining efficient initial cell selection. The terminal performs this bandwidth determination in advance, so when decoding is attempted, the correct parameters are already established, thus resolving the contradiction between productivity and reliability.
Data Source
AI summary
The disclosure relates to a 5th generation (5G) or 6th generation (6G) communication system for supporting a higher data transmission rate. A method performed by a user equipment (UE) in a wireless communication system is provided. The method may comprises receiving, from a base station, a synchronization signal/physical broadcast channel (SS/PBCH) block on a PBCH, identifying a frequency band on which the SS/PBCH block is received, in case that the frequency band is a first frequency band, determining configuration information for a control resource set (CORESET) for a Type0 physical downlink control channel (PDCCH) search space set based on a minimum channel bandwidth of the first frequency band, and in case that the frequency band is a second frequency band including a n79 frequency band, determining the configuration information for the CORESET corresponding to the n79 frequency band.