PUSCH Repetition Using Nonconsecutive Slots in TDD Uplink
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Solution Overview
Problem
Existing PUSCH repetition transmission techniques in 5G NR are limited by the requirement for consecutive slots, which restricts coverage enhancement in TDD patterns like 'DDDSU', and Type B repetition types improperly count downlink and special slots as invalid, reducing the number of usable symbols for transmission.
Innovation Solution
A terminal that performs PUSCH repetition transmission using nonconsecutive specific slots, allowing for improved channel quality by allocating specific slots as transmission occasions, even in TDD patterns like 'DDDSU', thereby enhancing coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If repetition Type A is used for PUSCH repetition transmission, then consecutive slots are utilized for transmission, but it cannot be applied when TDD pattern is 'DDDSU' or similar patterns with limited uplink slots
Solution Approach 1:
The patent introduces dynamic slot selection for PUSCH repetition transmission, allowing the system to adaptively choose transmission slots based on TDD patterns. Instead of fixed consecutive slot requirements, the terminal can dynamically identify suitable uplink slots (U slots and S slots with uplink symbols) within the TDD configuration, enabling flexibility across different TDD patterns like 'DDDSU' while maintaining transmission productivity.
2Adaptability or versatility
If repetition Type B is used to treat downlink symbols as invalid, then nonconsecutive slots can be used for PUSCH repetition, but the number of transmission occasions increases in D slots and S slots reducing effective transmission symbols
Solution Approach 1:
The patent applies local quality by making differentiated handling of slots based on their TDD configuration. Instead of uniformly treating all slots the same way, the terminal identifies and selects only the locally suitable uplink portions: U slots for full transmission and S slots with uplink symbols for partial transmission. This selective approach ensures that transmission resources are optimally utilized in each local context, avoiding waste of symbols in downlink-oriented slots while enabling nonconsecutive slot usage.
3Device complexity
If guard symbols are not treated as invalid in repetition Type B, then the specifications are designed for consecutive slots, but this limits the ability to use nonconsecutive slots for repetition transmission
Solution Approach 1:
The patent transitions from the conventional single-dimension approach (consecutive slots only) to a multi-dimensional slot selection framework. By introducing the concept of selecting slots based on TDD pattern dimensions (U slots, S slots with uplink symbols), the system can operate in nonconsecutive slot configurations while maintaining specification clarity. The guard symbols remain structurally intact but their impact is mitigated by the dimensional flexibility in slot selection, allowing nonconsecutive transmission without complicating the core specification framework.
Data Source
AI summary
Provided is a terminal including a transmission unit that performs repetition transmission of an uplink signal using an uplink channel, wherein the transmission unit performs the repetition transmission using specific slots that are nonconsecutive and allocated as transmission occasions for the repetition transmission.