RedCap Random Access Indication for Flexible Uplink Resource Use
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Solution Overview
Problem
Existing communication systems face challenges in efficiently providing earlier indications of Reduced Capability (RedCap) terminals during random access procedures, leading to a decrease in uplink resource utilization and user capacity due to excessive resource division.
Innovation Solution
A method where a terminal device determines, based on network-provided indication information, whether to provide an earlier indication of being a RedCap terminal in the first uplink information of a random access procedure, allowing flexible configuration of uplink resources to optimize network operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a terminal device camps on a cell with a wrong system frame number configuration, then the terminal can perform random access, but the terminal and network device cannot perform message exchange, causing access failure
Solution Approach 1:
The network device performs preliminary configuration of the system frame number in the SIB1 information before the terminal attempts random access. This advance configuration ensures that the terminal receives correct timing information before accessing the network, preventing the contradiction between allowing access and ensuring reliable message exchange.
Solution Approach 2:
The terminal device detects the system frame number by monitoring downlink timing and feeds back this information to verify configuration correctness. This feedback mechanism allows the terminal to identify and report wrong system frame number configurations, enabling the network to correct the issue and ensure reliable message exchange while maintaining access capability.
2Ease of operation
If the system frame number configuration is wrong, then the terminal can camp on the cell, but the terminal cannot obtain correct system information, causing access failure
Solution Approach 1:
The network device pre-configures the system frame number in SIB1 information before the terminal camps on the cell. This preliminary action ensures that when the terminal camps on the cell, it can immediately obtain correct system information including the system frame number, avoiding information loss while maintaining camping capability.
Solution Approach 2:
The terminal device monitors downlink timing to detect the system frame number and compares it with the configured value. If a mismatch is detected, the terminal feeds back the detected value to the network device, enabling correction of the configuration and ensuring the terminal can obtain correct system information while maintaining cell camping.
3Productivity
If the terminal sends a message using a wrong time alignment value, then the message can be transmitted, but the message cannot be correctly received, causing access failure
Solution Approach 1:
The network device provides preliminary time alignment configuration to the terminal through downlink timing information before the terminal transmits messages. This preliminary action ensures that when the terminal sends messages, it uses the correct time alignment value, enabling both transmission capability and reception accuracy.
Solution Approach 2:
The terminal device detects the system frame number by monitoring downlink timing and uses this information to determine the correct time alignment value. By feeding back the detected system frame number, the terminal ensures it uses the appropriate time alignment for message transmission, maintaining both transmission productivity and reception reliability.
Data Source
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AI summary
The present application relates to an information indication method, a terminal device, a network device, a chip, a computer-readable storage medium, a computer program product, a computer program and a communication system. The method comprises: a terminal device receiving first indication information from a network device; and the terminal device determining, according to the first indication information, whether to execute an earlier indication of a reduced capability terminal in first uplink information of a random access process. By using the embodiments of the present application, an earlier indication can be flexibly configured.