Random Access Back-off Signaling via Response Message
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in random access procedures, particularly in reducing overhead and optimizing radio resource usage, as they broadcast back-off parameters to all UEs, leading to unnecessary downlink overhead and inability to apply different back-off parameters to individual UEs.
Innovation Solution
The method involves transmitting a random access preamble, receiving a random access response message that includes back-off information, and using this information to perform back-off when access fails, allowing for dynamic and individualized back-off parameters to be applied to each UE, thereby reducing overhead and enhancing resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If back-off parameters are broadcast to all UEs through system information, then all UEs can receive back-off information, but downlink overhead increases unnecessarily
Solution Approach 1:
The patent extracts the back-off information signaling from the systematic broadcast channel and relocates it to the random access response message. This extraction allows back-off information to be transmitted only when random access occurs, eliminating unnecessary downlink overhead while ensuring reliable delivery to the specific UE that needs it.
Solution Approach 2:
The patent incorporates back-off information into the random access response message that is sent in advance before the UE attempts retransmission. This preliminary action ensures the UE receives the necessary back-off parameters immediately upon successful random access response, enabling timely back-off behavior without requiring subsequent broadcast messages.
2Adaptability or versatility
If back-off parameters are broadcast to all UEs, then all UEs can perform back-off, but individualized back-off parameters cannot be applied
Solution Approach 1:
The patent applies local quality by making back-off information specific to each UE's random access attempt. Instead of a uniform broadcast message, the system provides tailored back-off parameters in the random access response message addressed to the specific UE, enabling individualized back-off control without complex signaling mechanisms.
3Reliability
If back-off information is always broadcast, then UEs are always informed, but radio resource efficiency decreases
Solution Approach 1:
The patent transforms the continuous broadcast action into a periodic action triggered by random access events. Back-off information is now transmitted periodically only when random access occurs, rather than continuously, thereby improving radio resource efficiency while maintaining reliable information availability for UEs that need it.
Data Source
AI summary
A method for performing random access in a wireless communication system is provided. The method includes transmitting a preamble for random access in uplink, receiving a random access response message including back-off information as a response to the preamble, and performing back-off using the back-off information when the random access has failed.