Variable RV Position for Multi-Slot PUSCH Latency
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Solution Overview
Problem
Current 5G mobile communication systems face inefficiencies in uplink communication efficiency, particularly in managing time-domain resources for multi-slot PUSCH transmissions, which can lead to increased processing latency and decoding performance degradation due to fixed Redundancy Version (RV) positions and mis-detection of DCI signals.
Innovation Solution
A communication method and apparatus that determine the reading position of encoded data in a time-domain resource for uplink transmissions based on a resource amount independent of the reading result from a previous section, using a variable RV position for slot-by-slot Rate matching, thereby improving processing latency and decoding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed RV positions are used for multi-slot PUSCH transmissions, then device complexity is reduced, but processing latency increases and decoding performance deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from fixed RV positions to variable RV positions that change based on the slot index. Specifically, the RV position is determined by the formula RV = (RV0 + slot_index × delta_RV) mod 4, where RV0 is the initial RV position and delta_RV is a step value. This dynamic adjustment allows the system to adapt RV positions across multiple slots, improving processing efficiency and decoding performance without significantly increasing device complexity.
2Ease of operation
If fixed RV positions are used for multi-slot PUSCH transmissions, then ease of operation is improved, but decoding performance deteriorates
Solution Approach 1:
The patent implements dynamic RV position adjustment where the RV position varies according to the slot index using the relationship RV = (RV0 + slot_index × delta_RV) mod 4. This dynamic approach improves decoding performance by providing diverse redundancy versions across slots, enabling the receiver to select optimal RV positions for accurate decoding while maintaining operational simplicity through standardized formulas.
Solution Approach 2:
The patent changes the RV position parameter dynamically across slots rather than keeping it fixed. The RV position is adjusted using the formula RV = (RV0 + slot_index × delta_RV) mod 4, where different slot indices produce different RV positions. This parameter change strategy improves decoding reliability by providing varied redundancy information across multiple slots while maintaining ease of operation through systematic parameter adjustment.
3Manufacturing precision
If resource amount depends on reading result from previous section, then manufacturing precision is improved, but processing latency increases
Solution Approach 1:
The patent applies preliminary action by determining the RV position for the current slot based on the slot index and predetermined parameters (RV0 and delta_RV) before actual data transmission. The formula RV = (RV0 + slot_index × delta_RV) mod 4 allows the system to pre-calculate RV positions without waiting for reading results from previous sections, thereby reducing processing latency while maintaining precise resource allocation through systematic parameter-based determination.
Data Source
AI summary
This communication device is provided with: a control circuit for determining a read-out position of encoded data of a signal, in a first sector among a plurality of sectors in a time domain resource allocated to transmission of the signal, on the basis of a resource amount that does not depend on the result of a read-out of encoded data in a second sector before the first sector; and a transmission circuit for transmitting the signal on the basis of the read-out position.