Random Access Backoff Indicator for Diverse User Equipment Categories
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Solution Overview
Problem
The existing random access backoff mechanism in LTE systems cannot satisfy the diverse user demands, leading to delayed network access and potential blocking of subsequent service data transmission.
Innovation Solution
A method and device that send a random access backoff indicator with different backoff parameters for various categories of user equipment, allowing them to reinitiate access based on their specific demands and service requirements, thereby optimizing the random access procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single random access backoff parameter is used for all user equipment, then the random access procedure is simple to implement, but it cannot satisfy diverse user demands leading to delayed network access
Solution Approach 1:
The patent segments user equipment into different categories (e.g., normal access, emergency access, high priority) and assigns different backoff parameters to each category. The base station maintains multiple backoff parameter sets corresponding to different categories, allowing differentiated handling of various user access needs while maintaining manageable system complexity through structured categorization.
Solution Approach 2:
The patent applies local quality by providing different backoff parameters to different categories of user equipment based on their specific access requirements. Each category receives tailored backoff parameters (e.g., shorter backoff for emergency access, longer backoff for normal access), ensuring that each local group (category) of UEs gets optimized treatment for its specific needs.
2Reliability
If a longer backoff time is used to reduce collision probability, then random access collision is reduced, but network access delay increases for user equipment with short delay requirements
Solution Approach 1:
The patent implements dynamic backoff parameter selection where the base station adjusts the backoff parameter based on the category of each UE and current network conditions. Different categories of UEs receive dynamically appropriate backoff values - emergency and high priority UEs receive shorter backoff times to minimize delay, while normal UEs receive longer backoff times to reduce collision probability, making the system adaptable to varying requirements.
Solution Approach 2:
The patent changes the backoff time parameter based on UE category and access requirements. By maintaining multiple backoff parameter sets and selecting appropriate parameters for different UE categories, the system optimizes the balance between collision reduction and access delay - using shorter backoff parameters for time-sensitive UEs and longer parameters for collision-prone scenarios.
3Adaptability or versatility
If multiple backoff parameters are provided for different user equipment categories, then diverse user demands are satisfied, but the base station needs to maintain and manage multiple backoff parameter sets
Solution Approach 1:
The patent segments backoff parameters into organized sets corresponding to different UE categories. The base station maintains multiple backoff parameter sets (first backoff parameter set for normal access, second set for emergency access, etc.), where each set is clearly associated with a specific category. This structured segmentation allows the base station to manage complexity through systematic organization rather than random parameter storage.
Solution Approach 2:
The patent creates a universal framework where a single base station configuration structure handles multiple UE categories through multiple backoff parameter sets. The same base station uses the same signaling mechanisms and parameter management procedures for all categories, making the system multi-functional without proportionally increasing complexity. The framework universally applies to any number of UE categories.
Data Source
AI summary
Disclosed are a method and device for random access and instruction after random access rollback. The method comprises: a base station receiving a random access request Msg1 sent by a terminal, and sending a random access rollback instruction to instruct different types of terminals to apply different rollback parameters so as to initiate random access again after random access has failed; and the terminal receiving the random access rollback instruction sent by the base station, wherein the random access rollback instruction is used for instructing different types of terminals to apply different rollback parameters so as to initiate random access again after random access has failed, and initiating random access according to the random access rollback instruction.