Configured Uplink Grant Bitmap for Multi-Occasion PUSCH UCI
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Solution Overview
Problem
Existing XR technologies in 5G NR require improvements in low latency and high reliability for efficient transmission of three-dimensional time series image data, audio data, and control data, particularly in multiplexing uplink control information (UCI) with physical uplink shared channel (PUSCH) transmissions.
Innovation Solution
A terminal apparatus and base station apparatus implement a configured grant (CG) configuration to manage multiple PUSCH transmission occasions and UCI bits, allowing for multiplexing UCI in each PUSCH transmission based on a bitmap, enhancing the efficiency of UCI representation and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PUSCH transmission occasions are configured for XR data transmission, then transmission reliability and efficiency are improved, but UCI multiplexing complexity increases
Solution Approach 1:
The patent segments the UCI transmission by separating HARQ-ACK information from other UCI types, and further divides HARQ-ACK into multiple parts that can be transmitted in different PUSCH occasions. This segmentation allows the system to handle multiple transmission occasions without overwhelming complexity, as each segment can be processed and transmitted independently
Solution Approach 2:
The patent applies preliminary action by pre-configuring the bitmap length for UCI representation in the RRC message before actual transmission occurs. The base station determines and signals the bitmap length in advance, allowing the terminal to prepare UCI multiplexing configurations beforehand, reducing real-time processing complexity while maintaining reliable multi-occasion transmission
2Productivity
If UCI is multiplexed in each PUSCH transmission occasion, then transmission efficiency is improved, but latency increases
Solution Approach 1:
The patent implements periodic action by configuring PUSCH transmission occasions at regular intervals with predetermined timing relationships. The bitmap-based UCI multiplexing is performed periodically in each PUSCH occasion, allowing efficient transmission while maintaining controlled latency through the periodic structure that ensures UCI is transmitted at predictable time intervals rather than requiring continuous or delayed transmission
Data Source
AI summary
A terminal apparatus is configured to receive, from a base station apparatus, a radio resource control (RRC) message including a configured grant (CG) configuration, the CG configuration including information for configuring a plurality of physical uplink shared channel (PUSCH) transmission occasions based on a configured uplink grant and information for configuring a number of bits of uplink control information (UCI) on an unused transmission occasion, determine a number of bits of a bitmap of the UCI, based on the information for configuring the number of bits, and perform a PUSCH transmission in each of the plurality of PUSCH transmission occasions, based on the information for configuring the plurality of PUSCH transmission occasions.