Configured Grant HARQ Control for Service-Specific Data Transmission
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Solution Overview
Problem
Current communication technologies use a single HARQ operation for all services of a terminal device, failing to account for varying transmission requirements, leading to low flexibility and potential transmission delays.
Innovation Solution
Implementing a method where HARQ function states for HARQ processes associated with a configured grant are consistently enabled or disabled based on RRC signaling, ensuring a same HARQ operation for a service, and allowing flexibility in data transmission by configuring available HARQ processes accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a same HARQ operation is used for all services of a terminal device, then the system complexity is reduced and ease of operation is improved, but the adaptability to different service requirements deteriorates and transmission delays increase
Solution Approach 1:
The patent segments the HARQ operation configuration by service type. Different HARQ operations (first HARQ operation for reliability-critical services, second HARQ operation for delay-critical services) are assigned to different services through service identification mechanisms. This allows the system to maintain simplicity while achieving service-specific optimization.
Solution Approach 2:
The patent introduces dynamic selection of HARQ operations based on service requirements. The terminal device dynamically determines which HARQ operation to apply by identifying the service type and selecting the appropriate operation, enabling flexibility without increasing overall system complexity.
2Reliability
If HARQ feedback and retransmission are enabled for all services, then the reliability of data transmission is improved, but the transmission delay increases due to feedback processing
Solution Approach 1:
The patent applies different HARQ quality levels to different services. For reliability-critical services, full HARQ feedback and retransmission are enabled. For delay-critical services, HARQ feedback is disabled or simplified. This local differentiation optimizes both reliability and delay performance according to service requirements.
Solution Approach 2:
The patent changes the HARQ operation parameters (feedback enabled/disabled, retransmission configured/not configured) based on service type. This parameter adjustment allows the system to achieve high reliability when needed while minimizing delay when speed is critical.
3Adaptability or versatility
If different HARQ operations are configured for different services, then the adaptability to service requirements is improved, but the device complexity and configuration complexity increase
Solution Approach 1:
The patent creates a universal service identification mechanism that works across all services. The terminal device uses a unified method to identify service types and select corresponding HARQ operations, avoiding the need for separate complex configuration mechanisms for each service.
Solution Approach 2:
The patent pre-configures multiple HARQ operations in advance, with each operation optimized for specific service types. The terminal device simply needs to identify the service type and select the pre-configured operation, avoiding real-time complex decision-making and reducing operational complexity.
Data Source
AI summary
A data transmission method includes receiving first information. The first information is useable to indicate that a hybrid automatic repeat request (HARQ) function of a HARQ process associated with a first configured grant is enabled or disabled. The first configured grant is configured by radio resource control (RRC) signaling. The method further includes performing data transmission by the first configured grant based on the first information.