Random Access Resource Sharing for Enhanced RedCap Terminals
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Solution Overview
Problem
The wireless communication protocol lacks defined resources for random access by enhanced reduced capability terminals in protocol release 18, necessitating a method to select appropriate resources for message 1 transmission.
Innovation Solution
A terminal device determines a first random access resource, which can be from a reduced capability or non-reduced capability terminal, to transmit message 1, with priority given to reduced capability terminal resources when available, ensuring successful random access and uplink synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If no random access resource is configured for enhanced reduced capability terminals, then resource allocation complexity is reduced, but random access functionality is lost
Solution Approach 1:
The patent allows enhanced reduced capability terminals to use random access resources configured for other terminal types (reduced capability terminals or non-reduced capability terminals). This multi-functional resource sharing enables the system to maintain random access functionality without configuring dedicated resources, thereby reducing complexity while preserving reliability.
2Reliability
If dedicated random access resources are configured for enhanced reduced capability terminals, then random access reliability is improved, but system overhead increases
Solution Approach 1:
The patent merges the random access resource pools of different terminal types, allowing enhanced reduced capability terminals to access resources configured for reduced capability terminals or non-reduced capability terminals. This consolidation eliminates the need for separate dedicated resources, reducing system overhead while maintaining reliable random access through shared resource availability.
3Productivity
If random access resources of reduced capability terminals are used by enhanced reduced capability terminals, then resource utilization efficiency is improved, but resource availability for original users may be reduced
Solution Approach 1:
The patent implements dynamic resource selection where enhanced reduced capability terminals can adaptively choose from multiple available resource types (reduced capability terminal resources or non-reduced capability terminal resources). This dynamic approach optimizes resource utilization by allowing flexible sharing while maintaining reliability through multiple fallback options, ensuring original users retain access when needed.
Data Source
AI summary
This application provides a random access resource selection method and a communication apparatus. The method includes: A terminal device determines a first random access resource, and sends a message 1 to a network device on the first random access resource. The terminal device is an enhanced reduced capability first-type terminal, and the first random access resource includes a random access resource of a second-type terminal or a random access resource of a third-type terminal. The second-type terminal is a reduced capability terminal, the third-type terminal is a non-reduced capability terminal, the random access resource of the second-type terminal is used by the second-type terminal for random access to the network device, the random access resource of the third-type terminal is used by the third-type terminal for random access to the network device, and the message 1 is used by the terminal device for random access to the network device.