Random Access Resource Selection by Transport Block Size
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Solution Overview
Problem
Existing random access procedures in wireless communication systems face inefficiencies when switching between contention-free and contention-based random access types due to inflexible resource allocation and selection methods, leading to suboptimal performance and increased signaling requirements.
Innovation Solution
A method where a terminal device compares the target transport block size with preconfigured preamble groups to determine the appropriate random access type and resource selection, allowing flexible switching between contention-free and contention-based access without additional signaling, by using dedicated resources for efficient preamble group selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If contention-based random access is used for flexible resource allocation, then adaptability is improved, but device complexity and signaling requirements increase
Solution Approach 1:
The patent segments preambles into multiple groups (first group and second group) with different characteristics. The terminal device selects from these segmented groups based on transport block size, enabling flexible random access type selection without requiring complex dynamic resource allocation procedures.
Solution Approach 2:
The patent performs preliminary configuration by dividing preambles into different groups before the random access procedure. Each group is associated with specific transport block size ranges, allowing the terminal device to determine the appropriate random access type in advance based on its data requirements, eliminating the need for complex runtime decision-making.
2Speed
If contention-free random access resources are allocated, then connection establishment speed is improved, but resource allocation flexibility deteriorates
Solution Approach 1:
The patent introduces dynamic selection capability where the terminal device can choose between contention-free and contention-based random access based on real-time conditions (transport block size). The network device configures multiple preamble groups with different characteristics, enabling the system to adapt between dedicated resources (for speed) and shared resources (for flexibility) depending on the specific access scenario.
3Productivity
If multiple preamble groups are configured for different transport block sizes, then random access efficiency is improved, but device complexity increases
Solution Approach 1:
The patent changes the parameter of transport block size as the basis for preamble group selection. Instead of complex multi-dimensional criteria, the terminal device simply compares its transport block size against predefined thresholds to determine which preamble group to use, significantly simplifying the decision process while maintaining high random access efficiency.
Data Source
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AI summary
Embodiments of the present disclosure relate to random access in a communication system. A first device determines whether a contention-free random access resource is allocated from a second device for a first random access type. In accordance with a determination that the contention-free random access resource is allocated, the first device compares a target transport block size corresponding to the contention-free random access resource with a first transport block size configured for a first group of preambles available for the first random access type, and performs random access to the second device based on a result of the comparison.