NR Radio Signal Transmission With Adaptive xOverhead TBS Calculation
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Solution Overview
Problem
In 5G NR systems, the calculation of Transport Block Size (TBS) for Physical Uplink Shared CHannel (PUSCH) is affected by reserved Resource Elements (REs) not occupied by Physical Downlink Shared CHannel (PDSCH)/PUSCH, such as Channel-State Information Reference Signals (CSI-RS) and Control Resource SET (CORESET), requiring consideration of different overheads for varying transmission schemes.
Innovation Solution
Adapt the xOverhead parameter to the specific time-domain-resource size and transmission scheme, using different values for PDSCH/PUSCH transmission schemes in NR Release 15 and multi-segment transmission in NR Release 16 to accurately calculate TBS, considering the impact of CSI-RS and CORESET overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed xOverhead value is used for TBS calculation, then the calculation process is simple, but the precision is insufficient for different transmission schemes
Solution Approach 1:
The patent applies parameter changes by making the xOverhead value dynamic rather than fixed. The system selects different xOverhead values (first parameter or second parameter) based on the transmission scheme being used (single-segment or multi-segment). This allows the overhead parameter to adapt to different transmission scenarios, improving TBS calculation precision without requiring complex manual configuration for each case.
Solution Approach 2:
The patent implements dynamics by enabling the xOverhead parameter to change according to the transmission scheme. The network device determines whether to use the first or second parameter based on whether single-segment or multi-segment transmission is employed. This dynamic adaptation ensures the system maintains optimal performance across different operational modes while keeping the control mechanism relatively simple.
2Measurement precision
If different xOverhead values are used for different transmission schemes, then the TBS calculation precision is improved, but the system complexity increases
Solution Approach 1:
The patent uses parameter changes to enhance adaptability by providing two distinct xOverhead parameters that can be selected based on the transmission scheme. The first parameter is used for single-segment transmission while the second parameter is used for multi-segment transmission. This approach allows the system to adapt precisely to different transmission scenarios, improving both calculation accuracy and scheme versatility.
Solution Approach 2:
The patent applies universality by creating a unified TBS calculation framework that can handle both single-segment and multi-segment transmission schemes. The network device universally supports both transmission modes by selecting the appropriate xOverhead parameter, making the system versatile without requiring separate calculation mechanisms for each scheme.
3Measurement precision
If the xOverhead is not adapted to time-domain-resource size, then the configuration is simpler, but the calculation accuracy for varying resource sizes deteriorates
Solution Approach 1:
The patent applies parameter changes by linking the xOverhead selection to the time-domain-resource size characteristics. When the time-domain-resource size exceeds a threshold, the system selects the second parameter; otherwise, it uses the first parameter. This ensures the overhead parameter is adapted to the actual resource allocation, improving calculation accuracy for varying resource sizes while maintaining a relatively simple selection mechanism based on a clear threshold criterion.
Data Source
AI summary
A method and a device are provided in a UE and a base station for wireless communication. The UE receives a first signaling, and operates a first radio signal in K time domain resource(s). The first signaling is used for determining the K time domain resource(s), K is a positive integer; the first radio signal carries a first bit block, a first time-domain-resource size and a target parameter are used for determining the size of the first bit block, at least one of the K time domain resource(s) is used for determining the first time-domain-resource size; the target parameter is a first or a second parameter; whether the target parameter is the first parameter or the second parameter is related to the first time-domain-resource size, or, whether the target parameter is the first parameter or the second parameter is related to the K; the operating action is transmitting or receiving.