PBCH Payload Joint Encoding for NR Frequency Range Adaptation
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Solution Overview
Problem
In New Radio (NR) wireless communication systems, the physical broadcast channel (PBCH) payload size mismatch across different frequency ranges, such as sub-6 and above-6 frequency ranges, leads to inefficiencies in size matching and information transmission, particularly in beam direction indication and numerology alignment.
Innovation Solution
The base station adjusts the number of bits in the PBCH payload fields, such as the reserved field and RMSI config field, and jointly encodes the default DL numerology and PRB grid offset fields to size match the payload across frequency ranges, enabling efficient transmission of beam direction and numerology information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the PBCH payload fields are adjusted to size match across frequency ranges, then the information transmission efficiency is improved, but the device complexity increases due to joint encoding requirements
Solution Approach 1:
The patent combines multiple PBCH payload fields (default DL numerology field and PRB grid offset field) into a jointly encoded structure. This merging allows the base station to transmit both pieces of information within a unified encoding framework, achieving size matching across different frequency ranges while improving transmission efficiency.
2Adaptability or versatility
If the PBCH payload size is standardized across frequency ranges, then the adaptability is improved, but the measurement precision of beam direction indication may be reduced
Solution Approach 1:
The patent applies local quality by differentiating the interpretation of jointly encoded fields based on the specific frequency range. For sub-6 GHz, the encoding provides one level of precision, while for mmW frequencies, the same encoding structure provides adapted precision levels. This allows the system to maintain standardized payload sizes while preserving appropriate measurement precision for each frequency range's specific requirements.
Data Source
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Figure 3A~3B
AI summary
Methods, systems, and devices for wireless communications are described. In one example, a method includes selecting between a first frequency range and a second frequency range to transmit a physical channel, the second frequency range being higher than the first frequency range, and jointly encoding at least two fields of the physical channel based at least in part on the selected frequency range. In some cases, the method includes selecting between a first frequency range and a second frequency range to transmit a physical channel. In some cases, the second frequency range is higher than the first frequency range. The method may further include adjusting a quantity of bits associated with a field of the physical channel based at least in part on the selected frequency range.