PUSCH Channel Inference for Type B Repetition Reliability
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Solution Overview
Problem
Current wireless communication systems lack flexibility and efficiency in supporting multiple service types, particularly in scenarios involving enhanced Mobile BroadBand (eMBB), Ultra-Reliable and Low Latency Communication (URLLC), and massive Machine Type Communication (mMTC), limiting the reliability and efficiency of PUSCH transmission.
Innovation Solution
Implementing methods and devices that support channel inference for PUSCH transmission with repetition Type B, allowing the base station to infer the channel for a symbol on an antenna port from a corresponding symbol in the same slot or actual repetition, enhancing reception and transmission reliability and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If channel inference is performed across different slots for PUSCH transmission, then communication flexibility is improved, but channel estimation accuracy deteriorates due to channel variations
Solution Approach 1:
The patent dynamically adjusts the channel inference strategy based on the repetition type. For repetition type B, it dynamically switches to inferring channels within the same slot rather than across slots, adapting to the specific transmission scenario to maintain both flexibility and accuracy
Solution Approach 2:
The patent changes the temporal parameter for channel inference fromè·¨slot (across slots) to intra-slot based on the repetition type configuration. This parameter change allows the system to optimize channel estimation accuracy for repetition type B while maintaining communication flexibility through different inference strategies for different repetition types
2Reliability
If PUSCH transmission repetition Type B is implemented, then reception reliability is improved, but device complexity increases due to additional channel inference requirements
Solution Approach 1:
The patent uses channel copying within the same slot for repetition type B, where the channel characteristics are inferred from one symbol and applied to another symbol within the same slot. This copying approach simplifies the processing compared to cross-slot inference while maintaining reliability
Solution Approach 2:
The patent segments the channel inference process into slot-specific operations for repetition type B, separating it from cross-slot inference used for other repetition types. This segmentation reduces overall device complexity by handling each repetition type with its optimized inference method
3Adaptability or versatility
If cross-slot channel inference is used for all PUSCH repetitions, then communication flexibility is maintained, but transmission efficiency deteriorates for repetition Type B
Solution Approach 1:
The patent dynamically selects the channel inference method based on repetition type, using intra-slot inference for type B to improve transmission efficiency while maintaining cross-slot inference capability for other types to preserve communication flexibility
Solution Approach 2:
The patent applies different channel inference qualities to different repetition types: intra-slot inference with higher efficiency for repetition type B, and cross-slot inference for other types. This local optimization improves overall transmission efficiency without sacrificing flexibility
Data Source
AI summary
A user equipment includes reception circuitry configured to receive, from a base station, a PDCCH with a first DCI format, wherein the first DCI format schedules a PUSCH transmission; and control circuitry configured to perform the PUSCH transmission, in a case intra-slot frequency hopping is not enabled for the PUSCH transmission and a PUSCH repetition Type B is not applied to the PUSCH transmission, such that a first channel over which a first symbol on an antenna port used for an uplink transmission is conveyed can be inferred by the base station from a second channel over which a second symbol on the same antenna port is conveyed if the first symbol and the second symbol correspond to the same slot, and perform the PUSCH transmission in a case the PUSCH repetition Type B is applied to the PUSCH transmission, such that the first channel over which the first symbol on an antenna port used for an uplink transmission is conveyed can be inferred by the base station from the second channel over which the second symbol on the same antenna port is conveyed if the first symbol and the second symbol correspond to a same actual repetition of the PUSCH transmission.