Uplink Control Information Unused Transmission Occasion Indication
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently indicating unused transmission occasions in uplink control information (UCI), leading to resource wastage and suboptimal utilization of available resources.
Innovation Solution
The proposed solution involves a method where user equipment (UE) indicates the expected use of multiple transport blocks (TBs) in configured grant (CG) physical uplink shared channel (PUSCH) occasions through various signaling mechanisms, such as bitmaps or two-stage indications, allowing the network to reassigned unused resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the network schedules CG PUSCH occasions for multiple TBs, then resource availability is improved, but resource utilization efficiency deteriorates when UEs do not use all allocated TBs
Solution Approach 1:
The UE provides feedback to the network by transmitting UCI that indicates whether each TB in CG PUSCH occasions is skipped or not. This feedback mechanism enables the network to understand actual resource usage and dynamically reassign unused resources to other UEs, thereby resolving the contradiction between maintaining resource availability and improving resource utilization efficiency
Solution Approach 2:
The system transitions from static resource allocation to dynamic resource reassignment. The network can dynamically adjust resource allocation based on real-time feedback from multiple UEs about their actual transmission needs, allowing unused TB resources to be reassigned to other UEs that require them
2Loss of energy
If the UE transmits indication information for each TB in CG PUSCH occasions, then resource utilization efficiency is improved, but signaling overhead increases
Solution Approach 1:
The indication information is segmented into two stages: first-stage UCI indicates whether at least one TB is skipped in each CG PUSCH occasion, while second-stage UCI provides detailed information about which specific TBs are skipped. This segmentation reduces overall signaling overhead by only transmitting detailed information when necessary
Solution Approach 2:
The system uses partial indication in the first stage by only indicating whether any TB is skipped without specifying which ones. Detailed TB-level indication is only provided in the second stage when actually needed, avoiding excessive signaling when full detail is not required
3Loss of energy
If the UE uses two-stage indication for TB usage, then resource utilization efficiency is improved, but device complexity increases
Solution Approach 1:
The indication mechanism is divided into two separate stages with distinct functions. The first stage provides coarse-grained indication about TB skipping status, while the second stage provides fine-grained details. This segmentation allows the system to achieve high resource utilization efficiency while managing device complexity by breaking down the complex indication task into simpler, more manageable components
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit signaling indicating whether the UE expects to use each of multiple transport blocks (TBs) in one or more configured grant (CG) physical uplink shared channel (PUSCH) occasions. The network may schedule CG PUSCH occasions for transmission of low latency communications to avoid the latency involved with scheduling requests from a UE. Some UEs may be capable of transmitting multiple (e.g., two) TBs within a same CG PUSCH. A UE may indicate in a UCI whether the UE expects to use each of the multiple TBs in one or more CG PUSCH occasions. For example, if a UE indicates that the UE expects to use less than all of the TBs for a CG PUSCH occasion, the network may assign the unused resources (e.g., spatial resources) to another UE.