TDRA Table Selection for eRedCap Message Scheduling Delays
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Solution Overview
Problem
The Rel 18 eRedCap terminal devices face challenges in processing messages due to their reduced capabilities, leading to potential delays in uplink transmission when using existing TDRA tables, which are designed for legacy devices, resulting in incomplete message processing before scheduled transmission.
Innovation Solution
Implementing a flexible message scheduling method that utilizes multiple time domain resource allocation sets based on specific conditions, such as frequency domain resource thresholds and subcarrier spacing, to ensure timely processing and transmission for different types of terminal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the existing TDRA table designed for legacy terminal devices is directly used for Rel 18 eRedCap terminal devices, then the scheduling method is simple and compatible with existing systems, but the processing time is insufficient and uplink transmission cannot be performed based on scheduling
Solution Approach 1:
The patent divides the time domain resource allocation into multiple sets (first TDRA table and second TDRA table) with different processing time parameters. The system segments the scheduling approach based on terminal device capabilities, allowing legacy devices to use the first table while eRedCap devices use the second table with extended processing time, thus resolving the contradiction between system compatibility and processing time requirements.
2Loss of time
If the TDRA table is optimized for Rel 18 eRedCap terminal devices with longer processing time, then the processing capability is sufficient, but the scheduling flexibility for different terminal device types is reduced
Solution Approach 1:
The patent creates a universal scheduling mechanism that supports multiple terminal device types through multiple TDRA tables. The network device can selectively apply different tables based on device capability indicators, making the system universally applicable to both legacy devices and eRedCap devices while maintaining optimal processing times for each type.
Solution Approach 2:
The system dynamically selects which TDRA table to use based on the terminal device type indicator. This dynamic adaptation allows the scheduling parameters to change according to the specific device being scheduled, ensuring that each device type receives appropriate processing time while maintaining overall system flexibility.
3Adaptability or versatility
If multiple time domain resource allocation sets are implemented for different terminal types, then scheduling flexibility and processing time adequacy are improved, but the system complexity and configuration overhead are increased
Solution Approach 1:
The patent introduces a terminal device type indicator as an intermediary element that simplifies the selection process. Instead of complex configurations, the indicator acts as a key that directly maps to the appropriate TDRA table, reducing configuration complexity while maintaining the benefits of multiple allocation sets for different device types.
Data Source
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AI summary
This application provides a message scheduling method and an apparatus. The method includes: determining a target time domain resource allocation set, where the target time domain resource allocation set is a first time domain resource allocation set or a second time domain resource allocation set; receiving a first message, where the first message indicates a first parameter, the first parameter is for determining an interval between the first message and a second message in time domain, and the first parameter is a parameter in the target time domain resource allocation set; and sending the second message based on the first parameter. According to the method provided in this application, there are a plurality of time domain resource allocation sets, so that different time domain resource allocation sets are used under different conditions. In this way, different types of terminal devices can be scheduled, so that each type of terminal device can process a scheduling message and send a scheduled message in a timely manner, to improve network scheduling flexibility.