Configured Grant HARQ Mapping for Reliable Uplink Transmission
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Solution Overview
Problem
The challenge in 5G communication systems is determining how to accurately transmit uplink data using different Hybrid Automatic Repeat Request (HARQ) process identifiers for multiple configured grant (CG) occasions within a periodicity, which is essential for enhanced XR services to meet quality of service (QoS) requirements and avoid data loss or transmission delays.
Innovation Solution
The solution involves determining unique HARQ process identifiers for each CG occasion within a periodicity of a configured grant configuration, ensuring that each occasion uses distinct HARQ processes, thereby allowing for timely data transmission and preventing data loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple CG occasions share the same HARQ process identifier, then device complexity is reduced, but transmission reliability deteriorates due to potential data loss and delays
Solution Approach 1:
The patent segments the HARQ process identifier space by introducing a HARQ process identifier offset specific to each CG occasion. This allows multiple CG occasions to have distinct HARQ process identifiers even when using the same base HARQ process, thereby resolving the conflict between device complexity and transmission reliability.
2Reliability
If unique HARQ process identifiers are assigned to each CG occasion, then transmission reliability is improved, but device complexity increases due to additional identifier management
Solution Approach 1:
The patent applies local quality by introducing a localized offset parameter (HARQ process identifier offset) specific to each CG occasion. This offset is configured individually for each CG occasion, allowing unique HARQ process identifier assignment without requiring complete reconfiguration of the HARQ process management system, thus balancing reliability improvement with acceptable device complexity.
3Productivity
If HARQ process identifiers are reused across CG occasions, then resource utilization is improved, but transmission delay increases due to potential data loss requiring retransmission
Solution Approach 1:
The patent implements preliminary action by pre-configuring HARQ process identifier offsets for each CG occasion before data transmission begins. This ensures that each CG occasion has a predetermined unique HARQ process identifier, preventing data loss and avoiding the need for retransmission, thus reducing transmission delay while maintaining efficient resource utilization.
Data Source
AI summary
An uplink data transmission apparatus, configured in a terminal equipment, includes: processor circuitry configured to determine hybrid automatic repeat request (HARQ) process identifier(s) associated with one configured grant (CG) occasion in at least two configured grant occasions (CG occasions) in a periodicity of a configured grant (CG) configuration, at least according to a first parameter and a second parameter; wherein the first parameter is an integer starting from 0, and the second parameter is the number of configured grant occasions (CG occasions) in the periodicity of the configured grant (CG) configuration; and a transmitter configured to transmit uplink data on the one configured grant occasion (CG occasion) according to determined hybrid automatic repeat request (HARQ) process identifier(s) associated with the one configured grant occasion (CG occasion).