Multi-Time-Unit PUSCH Transmission With UCI Conflict Handling
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Solution Overview
Problem
Existing wireless communication technologies face issues with data loss and mismatches between base stations and wireless devices during uplink data transmission over multiple time units, particularly in Physical Uplink Shared Channel (PUSCH) transmissions, due to conflicts between control information and transport blocks, leading to performance degradation.
Innovation Solution
Implementing alternative multiplexing and scheduling restrictions to ensure consistent UCI multiplexing timelines, including postponing UCI multiplexing to subsequent time units and adjusting puncturing to minimize data loss, using signaling messages to indicate when and where UCI multiplexing should occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is transmitted in the first time unit, then control information transmission is achieved, but data loss and mismatches occur between base station and wireless device
Solution Approach 1:
The transport block is divided into multiple parts transmitted across different time units. The first part is transmitted in the first time unit without control information, while subsequent parts are transmitted in later time units where control information can be multiplexed. This segmentation resolves the conflict between control information transmission and data integrity.
Solution Approach 2:
The patent applies preliminary action by transmitting the first part of the transport block in the first time unit before control information becomes available. This allows the base station and wireless device to establish a common reference point before control information is multiplexed into subsequent parts, preventing mismatches.
2Productivity
If control information and transport block are multiplexed in the same time unit, then resource efficiency is improved, but mismatches and performance degradation occur
Solution Approach 1:
The transport block is segmented across multiple time units, with control information multiplexing applied selectively to parts transmitted in subsequent time units. This segmentation allows the system to maintain efficiency through multiplexing while avoiding mismatches by excluding the critical first part from control information overlay.
Solution Approach 2:
Different quality requirements are applied to different parts of the transport block. The first part receives protection from control information multiplexing to ensure baseline reliability, while subsequent parts can tolerate control information multiplexing for improved resource efficiency. This local differentiation resolves the contradiction between efficiency and alignment.
3Reliability
If puncturing is applied to resolve conflicts, then control information transmission is ensured, but data loss increases
Solution Approach 1:
The transport block is divided into multiple parts across different time units. By excluding the first part from puncturing and applying rate-matching instead, the patent protects critical data while allowing control information transmission in subsequent parts. This segmentation strategy minimizes overall data loss while ensuring control information gets through.
Solution Approach 2:
The patent converts the potential harm of puncturing into a benefit by strategically applying it only to non-critical parts of the transport block. The first part is protected from puncturing harm, while subsequent parts can tolerate controlled puncturing to accommodate control information, thus converting a harmful operation into a manageable trade-off.
Data Source
AI summary
Methods, apparatus, and systems that can reduce or eliminate loss of data and/or mismatches between the base station and wireless devices when transmitting uplink data over multiple time units are disclosed. In one example aspect, a method for wireless communication includes performing, by a wireless device, a transmission of a transport block using multiple time units based on a restriction. The transmission of the transport block is associated with a timeline that indicates when control information is transmittable. The restriction specifies that no control information is transmitted in a first time unit that is used for transmitting a first part of the transport block. A second part of the transport block in a second time unit subsequent to the first time unit is punctured in the transmission or proceed by rate matching in response to a conflict between the transport block and the control information according to the timeline.