Single Bit Redundancy Version Configuration for URLLC DCI
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G NR ultra-reliable low latency communication (URLLC) systems face challenges in efficiently configuring redundancy versions for downlink control information (DCI) formats, particularly with a single bit redundancy version field, which affects transmission reliability and decoding performance.
Innovation Solution
The method involves receiving a configuration of DCI formats with a single bit for the redundancy version field, detecting DCI, and selecting a redundancy version based on indicated selectable versions, with options for transmission repetitions, to enhance decoding capabilities and transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single bit redundancy version field is used in DCI format, then the DCI payload size is reduced and spectral efficiency is improved, but the transmission reliability and decoding performance deteriorate
Solution Approach 1:
The patent implements dynamic redundancy version selection where the single bit in the DCI format dynamically indicates one of two pre-configured redundancy versions. This dynamic mechanism allows the system to adaptively choose between different redundancy levels based on current channel conditions while maintaining a compact DCI format, thus resolving the contradiction between spectral efficiency and transmission reliability.
Solution Approach 2:
The patent changes the parameter representation by using a single bit to indicate redundancy version instead of using multiple bits or fixed redundancy versions. This parameter optimization reduces the DCI payload size (improving spectral efficiency) while still providing sufficient redundancy selection capability to maintain transmission reliability through intelligent configuration of the selectable redundancy versions.
2Reliability
If multiple redundancy versions are selectable, then the decoding capability is improved and transmission reliability is enhanced, but the device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple redundancy versions through higher layer signaling (RRC configuration) before actual data transmission. This allows the UE to have multiple decoding capabilities ready in advance, so when data is received, the UE can quickly select the appropriate pre-configured redundancy version based on the single bit indicator, avoiding the need for complex real-time analysis and reducing device complexity during operation.
Data Source
AI summary
Example implementations include a method, apparatus and computer-readable medium of wireless communication, including receiving a configuration of one or more downlink control information (DCI) formats to include a single bit for a redundancy version field. The implementations further include receiving a radio resource control (RRC) message indicating selectable redundancy versions. Additionally, the implementations further include detecting a DCI based on the one or more DCI formats including the single bit for the redundancy version field, the DCI scheduling a transmission. Additionally, the implementations further include selecting a redundancy version from the selectable redundancy versions based on the single bit. Additionally, the implementations further include encoding or decoding the transmission based on the redundancy version.