Dynamic Random Access Mode Selection for Collision Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in selecting the optimal random access (RA) mode, leading to inefficiencies such as increased collisions and resource overhead due to the use of quick RA modes without considering synchronization status, channel conditions, and data size, which affects transmission success and latency.
Innovation Solution
A method for selecting RA mode based on impact factors such as synchronization status, channel conditions, early data transmission capability, predefined access categories, and network indications, allowing flexible selection between quick and slow RA modes to optimize transmission success and reduce collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If quick RA mode is used without considering synchronization status and channel conditions, then RA latency is reduced, but collision rate increases and transmission success rate deteriorates
Solution Approach 1:
The patent implements dynamic RA mode selection that adapts to changing synchronization status and channel conditions. The terminal device evaluates current system state and selects between quick and slow RA modes in real-time, making the system flexible rather than static. This resolves the contradiction by allowing the system to use quick mode when conditions permit (reducing latency) while switching to slow mode when conditions deteriorate (maintaining reliability).
Solution Approach 2:
The patent changes the operational parameters of the RA procedure by introducing multiple RA modes with different characteristics (quick mode for low latency, slow mode for high reliability). The system selects appropriate parameters based on synchronization status and channel conditions, resolving the contradiction by having multiple parameter sets available rather than a single fixed configuration.
2Productivity
If quick RA mode is used without considering data size, then RA procedure speed is improved, but resource overhead increases due to inefficient resource utilization
Solution Approach 1:
The patent implements dynamic selection between RA modes based on data size requirements. When data size is small and time-critical, quick mode is selected for high productivity. When data size is large or resources are constrained, slow mode is selected to reduce resource overhead. This dynamic adaptation resolves the contradiction between speed and resource efficiency.
Solution Approach 2:
The patent introduces multiple RA modes with different resource allocation parameters. The quick mode uses aggressive resource allocation for speed, while the slow mode uses conservative allocation for efficiency. By selecting the appropriate mode based on data size, the system optimizes the trade-off between productivity and resource overhead.
3Adaptability or versatility
If multiple RA modes are supported simultaneously in a cell, then system adaptability is improved, but device complexity increases
Solution Approach 1:
The patent segments the RA procedure into distinct modes (quick RA and slow RA) with clearly defined characteristics and selection criteria. Each mode has specific synchronization requirements, channel condition thresholds, and data size ranges. This segmentation allows the terminal device to implement a decision tree or lookup table for mode selection, managing complexity through structured organization rather than monolithic complexity.
Solution Approach 2:
The patent manages device complexity by parameterizing the RA mode selection based on measurable quantities (synchronization status, channel quality, data size). Rather than requiring complex intelligence, the terminal device evaluates specific parameters against predefined thresholds and selects the corresponding mode. This parameter-driven approach maintains adaptability while controlling complexity through rule-based decision making.
Data Source
AI summary
Embodiments of the present disclosure relate to selecting random access (RA) mode. In example embodiments. The method comprises obtaining an impact factor associated with RA of a terminal device to a network device, the impact factor indicating at least one of the following: a synchronization status between the terminal device and the network device, a status of a channel between the terminal device and the network device for performing RA, a capability of the terminal device for supporting early data transmission (EDT), a predefined access category of the terminal device, or a RA mode-related indication received from the network device; selecting a RA mode at least in part based on obtained impact factor; and performing RA to the network device with the selected RA mode. In this way, the terminal device may select different RA mode according to different scenario.