Terminal Redundancy Version Control via Downlink Indication
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Solution Overview
Problem
Current communication systems, such as LTE and emerging New Radio (NR) standards, face challenges in efficiently managing uplink and downlink communications due to limitations in error correction codes and control information processing, particularly in scenarios like eMBB, mMTC, and URLLC, where precise control of redundancy versions and soft bit handling is crucial.
Innovation Solution
The solution involves a terminal and base station apparatus with advanced coding and decoding units that utilize downlink control information to schedule and configure code block groups, where redundancy versions are dynamically set or indicated based on the presence or absence of flushing instructions, optimizing the transmission of transport blocks on PDSCH and PUSCH channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundancy version is dynamically indicated by downlink control information, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The redundancy version is made dynamic by indicating it through downlink control information rather than using a fixed preset value. This allows the system to adapt the redundancy version according to real-time channel conditions and transmission requirements, thereby improving communication reliability while managing device complexity through standardized control mechanisms.
Solution Approach 2:
The redundancy version parameter is changed from a static preset value to a dynamically indicated value through downlink control information. This parameter change enables flexible adjustment of error correction characteristics based on transmission conditions, resolving the contradiction between reliability improvement and device complexity.
2Manufacturing precision
If soft bit flushing is controlled by downlink control information, then manufacturing precision of communication protocol is improved, but ease of operation deteriorates
Solution Approach 1:
The system uses feedback through downlink control information to indicate whether soft bit flushing should be performed. This feedback mechanism enables precise control of the flushing operation according to actual transmission conditions, improving protocol precision while maintaining ease of operation through automated control rather than manual configuration.
3Loss of information
If redundancy version is configured to preset value upon flushing, then loss of information is reduced, but productivity decreases
Solution Approach 1:
The redundancy version is dynamically adjusted based on whether flushing is indicated, rather than always using a preset value. This dynamic adjustment allows the system to reduce information loss when flushing is necessary while maintaining high communication efficiency when flushing is not required, resolving the contradiction between information loss reduction and productivity.
Data Source
AI summary
A terminal apparatus capable of efficiently performing uplink and/or downlink communication is provided. With respect to communication related to transport blocks and code block groups, in a case that a PDSCH and/or a PUSCH is scheduled by a PDCCH detected in a common search space CSS, an operation applied to a transmission process includes a prescribed operation regardless of a prescribed condition and first configuration information. In a case that the PDSCH and/or the PUSCH is scheduled by the PDCCH detected in a UE-specific search space USS, the operation applied to the transmission process is provided, based at least on the prescribed condition and/or the first configuration information.