Priority-Based Backoff Time Segmentation for Random Access
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Solution Overview
Problem
In LTE systems, random access events of different priorities often conflict due to overlapping backoff time ranges, leading to inefficiencies and delays in re-initiating access procedures.
Innovation Solution
A method where terminal devices determine backoff times for random access events based on priority, allocating distinct non-overlapping backoff time ranges for high and low priority events, allowing for separate re-initiation times to avoid conflicts and optimize access procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single backoff time range is used for all random access events, then the system is simple to operate, but conflicts occur between random access events of different priorities
Solution Approach 1:
The patent segments the backoff time range into multiple sub-ranges, each corresponding to a different priority level. High-priority events are assigned to a first backoff time range, while low-priority events are assigned to a second backoff time range. This segmentation ensures that events of different priorities do not conflict with each other while maintaining clear operational rules for each segment.
2Reliability
If backoff time ranges are separated by priority, then conflicts between different priority events are avoided, but the device complexity increases
Solution Approach 1:
The patent applies local quality by assigning different backoff time range characteristics to different priority levels. Each priority level has its own optimized backoff time range parameters, allowing the system to tailor the backoff behavior locally according to the specific requirements of each priority level without making the entire system overly complex.
3Speed
If high-priority events use a shorter backoff time range, then re-initiation speed is improved, but the backoff time range for low-priority events must be longer
Solution Approach 1:
The patent implements dynamic backoff time range assignment where the backoff time range is not fixed but adapts based on the priority level of the random access event. High-priority events dynamically access a shorter first backoff time range for faster re-initiation, while low-priority events access a longer second backoff time range, creating a dynamic system that responds to priority requirements.
Data Source
AI summary
The embodiment of the present application discloses a method for random access and a terminal device. The method includes: a terminal device determines a backoff time of a random access event according to a priority of the random access event, where the random access event with the First priority corresponds to a first backoff time range, a random access event with a second priority corresponds to a second backoff time range, the first priority is higher than the second priority, and the first backoff time range and the second backoff time range do not overlap; and after the backoff time, the terminal device re-initiates the random access procedure.