PDCCH Reception via SS/PBCH Offset in CORESET
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving downlink channels, particularly in determining the frequency position and bandwidth of synchronization signal blocks, which affects system information decoding and channel estimation.
Innovation Solution
A method and apparatus for receiving and transmitting a Physical Downlink Control Channel (PDCCH) using information from the Physical Broadcast Channel (PBCH) within a Control Resource Set (CORESET), where the offset between the synchronization signal block and CORESET frequency positions is defined based on subcarrier spacing and minimum channel bandwidth, enabling precise synchronization and channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the frequency position and bandwidth of synchronization signal blocks are not accurately determined, then system information decoding and channel estimation become inefficient, but defining the offset based on subcarrier spacing and minimum channel bandwidth increases system complexity
Solution Approach 1:
The patent defines the offset between SS/PBCH block and CORESET frequency positions using parameters that can be defined based on subcarrier spacing and minimum channel bandwidth. This allows the system to adapt the frequency position determination to different numerologies and bandwidth configurations, achieving accurate positioning while maintaining flexibility across various system scenarios
Solution Approach 2:
The patent segments the frequency position determination into discrete offset values that can be independently configured. By defining specific offset values between SS/PBCH block and CORESET, the system breaks down the complex frequency positioning problem into manageable, configurable parameters that can be optimized separately
2Productivity
If the offset between SS/PBCH block and CORESET is precisely defined, then downlink channel reception efficiency improves, but the number of bits required for information transmission increases
Solution Approach 1:
The patent enables the offset parameters to be defined based on subcarrier spacing and minimum channel bandwidth, allowing the same number of bits to represent a larger or smaller range of offset values depending on the system configuration. This dynamic parameter scaling reduces the average information bit length required while maintaining precise offset definition
Solution Approach 2:
The system dynamically adjusts the offset configuration based on operating conditions such as subcarrier spacing and bandwidth. This dynamic adaptation allows the offset information to be efficiently encoded with variable bit lengths, optimizing the balance between precision and information overhead for different deployment scenarios
3Measurement precision
If synchronization raster size is defined based on minimum channel bandwidth and subcarrier spacing, then synchronization accuracy improves, but device complexity for handling variable configurations increases
Solution Approach 1:
The patent defines synchronization raster size as a function of minimum channel bandwidth and subcarrier spacing, creating a standardized relationship that reduces the need for arbitrary configuration values. This parameter-based definition simplifies device implementation by providing a deterministic method to calculate raster sizes across different system configurations
Solution Approach 2:
The patent creates a universal synchronization raster definition that works across multiple bandwidth and subcarrier spacing configurations. By establishing a standardized relationship between raster size and system parameters, the same synchronization mechanism can be applied universally across different numerologies and bandwidth scenarios, reducing device complexity
Data Source
Figure 1(A)~1(B)
Figure 2
Figure 3(a)~3(b)
AI summary
The present invention discloses a method for a user equipment to receive a PDCCH (Physical Downlink Control Channel) for RMSI (Remaining Minimum System Information). The method comprises: receiving an SS/PBCH block containing an SS (Synchronization Signal) and a PBCH (Physical Broadcasting Channel); obtaining information related to a CORESET (Control resource set) for the PDCCH; and receiving the PDCCH within the CORESET based on the information. The information includes an offset between a frequency position of the SS/PBCH block related to the COPRESET and a frequency position of the CORESET. Values of the offset are defined based on subcarrier spacing of the SS/PBCH block and a minimum channel bandwidth.