Random Access Response Generation for Wireless Contention Resolution
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Solution Overview
Problem
Current contention resolution methods in wireless communication systems are inadequate to reliably resolve access contentions as the number of user equipment attempting to access a base station increases, leading to unreliable connection establishment due to collisions.
Innovation Solution
The method generates unique random access responses (RAR) for each random access preamble instance, with time advance information differing between instances, and selects one RAR based on criteria such as equivalent time advance information or distance, to reduce contention and enhance connection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current contention resolution methods are used, then the system can handle simple access scenarios, but the reliability of connection establishment deteriorates as the number of user equipment increases due to collisions
Solution Approach 1:
The base station segments the random access response by generating multiple unique RARs, each corresponding to a specific random access preamble instance. This segmentation allows each RAR to be specifically tailored to a particular preamble transmission, enabling reliable collision resolution even when multiple user equipment attempt access simultaneously. The segmentation transforms a single contested response into multiple dedicated responses.
Solution Approach 2:
The invention changes the parameter of time advance information by providing different time advance values in each unique RAR corresponding to different preamble instances. This parameter differentiation allows the system to distinguish between multiple access attempts and resolve contentions by assigning appropriate timing adjustments to each user equipment, thereby maintaining connection establishment reliability as user equipment numbers increase.
2Reliability
If multiple unique RARs are generated for each preamble instance, then access contention resolution improves, but the complexity of the random access procedure increases
Solution Approach 1:
The user equipment automatically selects an appropriate RAR from the multiple unique RARs received by examining time advance information equivalence or distance criteria. This self-service mechanism eliminates the need for additional base station intervention or complex arbitration procedures, resolving access contention reliably while keeping the overall system complexity manageable through autonomous device-level decision making.
3Productivity
If unique RARs with different time advance information are provided for each preamble instance, then connection establishment efficiency improves, but the information processing load increases
Solution Approach 1:
The base station generates multiple unique RARs with different time advance information for different preamble instances, providing more information than a single RAR would convey. This partial or excessive action of providing differentiated timing information enables user equipment to efficiently select the most appropriate RAR based on their specific transmission characteristics, thereby improving connection establishment efficiency while the information load is managed through structured differentiation rather than unstructured data proliferation.
Data Source
AI summary
For random access wireless communication, in response to receiving two or more first random access preamble instances, a method generates at least one unique random access response (RAR) for each first random access preamble instance. The time advance information for each first random access preamble instance is different from time advance information for each other first random access preamble instance.