Random Access Method Reducing Signaling Overhead
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Solution Overview
Problem
The current competitive random access process in communication systems is inefficient due to the need for user equipment to monitor frequency bands, leading to increased signaling overhead and potential failure in decoding messages, especially when the frequency band is occupied, causing longer random access times and potential collisions with other devices using unlicensed frequency bands.
Innovation Solution
A method and apparatus that adjust antenna radiation power by determining whether the overhead of waiting for a second message set reaches a preset condition, initiating random access in a preset manner, which involves sending messages in pairs to improve decoding success rates and reduce collisions, and includes a module to determine LBT competition failures for unlicensed frequency bands to optimize message transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the user equipment sends a large amount of message data in one step to integrate two random access processes, then the random access time is reduced, but the signaling overhead increases and the base station decoding capability is compromised
Solution Approach 1:
The patent segments the random access message into two parts: a first message containing essential access information and a second message containing additional data. This segmentation allows the base station to process the first message efficiently while the second message can be transmitted in subsequent steps, reducing immediate signaling overhead while maintaining access speed.
Solution Approach 2:
The patent applies preliminary action by having the user equipment transmit the first message set containing critical random access information before the base station completes its full processing. This allows the base station to initiate processing in advance while the second message is prepared, effectively reducing overall access time without overwhelming the base station with all data at once.
2Reliability
If the user equipment monitors the frequency band every time it sends a message, then the frequency band occupancy is controlled, but the random access process takes longer time
Solution Approach 1:
The patent performs Listen-Before-Talk (LBT) competition failure detection in advance before the random access process begins. By determining whether the frequency band is occupied beforehand and adjusting the access strategy accordingly, the system avoids repeated monitoring during the actual message transmission, thereby reducing access time while maintaining frequency control reliability.
3Reliability
If the user equipment continues waiting for the second message set without initiating new random access, then the decoding success rate is improved, but the time overhead increases
Solution Approach 1:
The patent implements a feedback mechanism where the user equipment monitors whether the second message set is received within a predetermined time window. Based on this feedback, the system dynamically decides whether to continue waiting for the second message or initiate a new random access process. This feedback loop optimizes the balance between decoding success rate and time overhead by adapting to actual transmission conditions.
Data Source
AI summary
A contention random access method, includes: after sending a first message set concerning random access to a base station, waiting to receive a second message set concerning random access sent by the base station; determining whether overhead for waiting for the second message set reaches a first preset condition; if the overhead reaches the first preset condition, initiating random access to the base station in a preset manner; and if the overhead does not reach the first preset condition, continuing to wait for the second message set. According to the embodiments of the present disclosure, in cases where the overhead reaches the first preset condition, the random access manner can be changed, and the random access is initiated to the base station in a preset manner.