Segmented UE ID Transmission for 5G Random Access Collision Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Next-generation wireless communication systems, such as 5G NR, face challenges in transmitting complete UE identification information during Random Access procedures due to limited message size, leading to increased collision possibilities and delayed UE state transitions.
Innovation Solution
A method where a User Equipment (UE) segments its identification information into two parts and transmits them in separate messages, with the base station providing separate UL grants for each part, allowing for successful contention resolution and efficient UE context retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the UE transmits complete identification information in a single message during Random Access procedure, then the identification is complete and accurate, but the message size exceeds the limited capacity available in 5G NR systems
Solution Approach 1:
The UE ID is divided into two separate parts: first part transmitted in MSG3 and second part transmitted in MSG5. This segmentation allows the complete UE identification information to be conveyed without exceeding the message size limits of individual Random Access messages, directly resolving the contradiction between information completeness and message size constraints
2Quantity of substance
If the UE transmits identification information in multiple separate messages, then the message size fits within system limits, but the collision possibility increases during contention resolution
Solution Approach 1:
By segmenting the UE ID into parts transmitted at different stages (MSG3 and MSG5), the system maintains message size within limits while enabling progressive contention resolution. The first part allows initial contention resolution, and the second part provides final verification, thereby maintaining reliability despite multiple message transmissions
3Quantity of substance
If the UE transmits identification information in multiple separate messages, then the message size fits within system limits, but the UE state transition time is delayed
Solution Approach 1:
The first part of the UE ID is transmitted in MSG3 during the initial Random Access procedure, enabling preliminary contention resolution to begin earlier. The second part is transmitted in MSG5 to complete the process. This preliminary action approach reduces the overall state transition time by initiating contention resolution in the first message rather than waiting for a single complete message
Data Source
AI summary
A method for transmitting identification information of a User Equipment (UE) during a Random Access (RA) procedure is provided. The method includes transmitting, by a UE, a first part of a UE Identity (ID) to a base station; transmitting, by the UE, a second part of the UE ID to the base station; and receiving, by the UE, a contention resolution message from the base station, where the contention resolution message includes a UE contention resolution ID determined based on the first part of the UE ID and the second part of the UE ID.