RMSI CORESET Configuration via PBCH Bit Reduction
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Solution Overview
Problem
The existing wireless communication technologies face challenges in efficiently reducing the number of bits required for broadcasting the configuration of Remaining Minimum System Information (RMSI) over the Physical Broadcast Channel (PBCH), which limits the granularity and overhead of the information transmitted.
Innovation Solution
A method is proposed to reduce the number of bits in the PBCH by using a configuration table that assumes fixed or limited bandwidth for RMSI CORESET, aligning RMSI CORESET with SS/PBCH blocks in time and frequency, and defining specific positions for RMSI transmission, allowing for efficient encoding and decoding of RMSI configuration within 8 bits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the PBCH payload size is increased to include more RMSI configuration bits, then the information granularity and configuration flexibility improve, but the PBCH size and overhead increase
Solution Approach 1:
The RMSI configuration is segmented into multiple fields with specific bit allocations: 8 bits for CORESET configuration, 4 bits for timing information, and 4 bits for frequency information. This segmentation allows the PBCH to carry comprehensive configuration data while maintaining a controlled payload size structure.
Solution Approach 2:
The patent applies parameter changes by using variable bit fields that can represent different configuration values. For example, the CORESET configuration uses 8 bits that can represent multiple CORESET settings, and the timing information uses 4 bits to indicate different offsets and periods. This allows flexible configuration without increasing the overall PBCH size proportionally.
2Length of stationary object
If the PBCH payload is optimized to fit within limited bits, then the PBCH overhead is reduced, but the information granularity and configuration precision are limited
Solution Approach 1:
The patent applies partial action by providing the most critical configuration parameters within the limited 8-bit CORESET field, such as the CORESET index and basic timing information. While not all possible configuration values can be represented with limited bits, the essential parameters for RMSI delivery are captured, balancing precision requirements with bit constraints.
Solution Approach 2:
The patent resolves the precision limitation by organizing configuration information across multiple dimensions: time-domain parameters (offset, period), frequency-domain parameters (CORESET location), and hierarchical structure (MIB containing RMSI config). This multi-dimensional organization allows precise configuration representation within constrained bit fields.
3Loss of time
If the RMSI configuration is decoded quickly within 1-2 milliseconds, then the system response time is improved, but the complexity of the decoding process increases
Solution Approach 1:
The patent applies preliminary action by pre-defining the PBCH payload structure with fixed field positions and bit lengths. The CORESET configuration field is always positioned first, followed by timing and frequency fields in predetermined locations. This preliminary structuring allows wireless devices to quickly parse and decode the RMSI configuration without complex parsing logic, achieving fast decoding within 1-2 milliseconds.
Solution Approach 2:
The segmentation of the PBCH payload into distinct, labeled fields (CORESET config, timing info, frequency info) with fixed positions enables simple sequential decoding. The wireless device can read each field in order without complex interpretation, significantly reducing decoding complexity and time while maintaining comprehensive configuration information.
Data Source
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AI summary
A method, system and apparatus for reducing a number of bits of a physical broadcast channel (PBCH) used to broadcast a configuration of a remaining minimum system information (RMSI) data set as compared with other arrangements are disclosed. According to one aspect, a method in a network node includes determining a remaining minimum system information (RMSI) configuration based on a table of assumptions used to determine a number of bits to represent the RMSI configuration and broadcasting the RMSI configuration using the determined number of bits via a physical broadcast channel (PBCH).