Random Access Backoff Time Adaptation for Wireless Terminals
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Solution Overview
Problem
The existing random access procedure in LTE systems lacks flexibility in selecting backoff times, leading to inefficient communication and system performance due to the same maximum waiting time being applied for different conditions triggering random access procedures.
Innovation Solution
A method where terminal devices determine backoff times based on specific conditions for initiating random access procedures, using thresholds and probabilities provided by network devices, allowing for tailored backoff times to improve communication flexibility and system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single maximum waiting time is applied for all random access procedures, then the system is simple to operate, but the adaptability to different conditions is poor
Solution Approach 1:
The patent applies local quality by configuring different maximum waiting times (first maximum waiting time and second maximum waiting time) for different random access conditions. The network device provides condition-specific backoff parameters, allowing terminal devices to select appropriate waiting times based on the triggering condition, thereby achieving localized optimization for each access scenario while maintaining overall system manageability.
Solution Approach 2:
The patent segments the random access procedure into different condition-based categories. By dividing the backoff time determination into condition-specific segments (with different maximum waiting times for different conditions), the system achieves finer control and adaptability without requiring complete redesign of the overall random access mechanism.
2Reliability
If a single maximum waiting time is used for all random access procedures, then the configuration is simple, but the system performance is insufficient
Solution Approach 1:
The patent improves system performance by applying local quality through condition-specific maximum waiting time configurations. Different conditions (such as different access types or network states) receive tailored backoff parameters, optimizing the random access success rate and system performance for each scenario while the network device manages the complexity of configuration and distribution.
3Adaptability or versatility
If backoff time is not differentiated by condition, then the operation is simple, but communication flexibility is reduced
Solution Approach 1:
The patent applies dynamics by making the backoff time selection adaptive and conditional rather than static. Terminal devices dynamically select between first and second maximum waiting times based on the specific condition triggering the random access procedure, enabling flexible communication adaptation while the automated condition-based selection maintains operational simplicity.
Data Source
AI summary
Disclosed are a method for random access, and a terminal device and a network device. The method comprises: where the random access of a first terminal device fails, the first terminal device determining, according to a trigger condition of the random access, the length of a waiting time before the random access is initiated again; and the first terminal device re-initiating the random access according to the length of the waiting time. The method, the terminal device and the network device provided in the embodiments of the present applicant can improve the flexibility and system performance of a communication system.