PUSCH Repetition Scheduling Across Full- and Half-Duplex Slots
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Solution Overview
Problem
The challenge lies in determining how to effectively utilize symbols indicated as downlink in RRC signaling for sending repetitions of a PUSCH scheduled by an RAR uplink grant, particularly in scenarios supporting full-duplex and half-duplex communication, to improve random access performance and uplink capacity.
Innovation Solution
A method is introduced to determine slots for PUSCH repetitions based on RRC signaling and an information block, ensuring that each repetition occurs only in symbols other than downlink symbols, with the reference slot determined by the end of the PDSCH, using additional subcarrier spacing-specific slot delay values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If downlink symbols indicated by RRC signaling are used for sending PUSCH repetitions, then resource utilization efficiency is improved, but conflict with downlink transmission occurs
Solution Approach 1:
The patent applies local quality by differentiating between two types of downlink symbols: those configured for full-duplex operation (which can be used for uplink) and those configured for half-duplex operation (which cannot). This local differentiation allows the system to selectively use specific downlink symbols for PUSCH repetitions based on their operational mode, thereby improving resource utilization while avoiding transmission conflicts.
2Device complexity
If a unified solution is applied for full-duplex and half-duplex scenarios, then device complexity is reduced, but flexibility in handling different communication modes is limited
Solution Approach 1:
The patent implements dynamics by making the determination of first-type slots adaptive based on the operational mode. The system dynamically identifies whether a downlink symbol belongs to a first-type slot (usable for uplink) or second-type slot (not usable) based on the full-duplex or half-duplex configuration. This dynamic adaptation allows a unified solution to handle different scenarios flexibly without increasing hardware complexity.
3Loss of time
If PUSCH repetitions are scheduled in consecutive slots, then transmission delay is reduced, but interference from downlink symbols increases
Solution Approach 1:
The patent applies the taking out principle by extracting and identifying specific downlink symbols that are suitable for uplink transmission (first-type slots) among all downlink symbols. By separating these usable symbols from unusable ones, the system can schedule PUSCH repetitions in consecutive first-type slots without interference, thereby reducing transmission delay while avoiding downlink interference.
Data Source
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AI summary
Disclosed in the present application are a method and apparatus used in a node for wireless communication. A first receiver receives first RRC signaling and a first information block; the first receiver receives a first PDSCH, the receiving of the first PDSCH being used for acquiring a first RAR uplink grant; and a first transmitter sends a plurality of repetitions of a first PUSCH in N time slots, wherein the first RAR uplink grant is used for scheduling the first PUSCH; the first RAR uplink grant is used to indicate N; N is a positive integer greater than 1; the N time slots are first N first-type time slots starting from a reference time slot; in the first N first-type time slots starting from the reference time slot, one repetition of the first PUSCH only comprises symbols other than a first type symbol; whether at least one symbol indicated by the first RRC signaling to be a downlink symbol is a first type symbol depends on the first information block.