5G通信环境下基于四步随机接入的网络时延控制研究

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中图分类号：TP273 文献标志码：A

文章编号：1672-7010（2025）06-0031-08

Network delay control based on four-step random access for a 5G communication environment

ZENG Weizhong

（Engineering TrainingCenter，Putian University，Putian 3511OO，China）

Abstract： To addressthe shortcomings of existing network delay control methods—such as high preamble collsion rate，low success rate of terminal random access，and prolonged average access delay—a four -- step random access-based control scheme is proposed for a 5G communication environment. The approach involves identifying delays in random access，propagation， processing，and contention，and constructing a 5G network delay control architecture.By adaptively alocating preamble sequences based on queue interference rate，the scheme reduces preamble collisions and minimizes the maximum number of retransmisions at the medium access control （MAC） layer. Simultaneously，a resource preemption procedure is implemented at the resource scheduling layer to rationally manage the orderof access resource alocation and achieve cross-layer interaction at the rsource layer，thereby efectively controlling network delay. Experimental results show that the proposedmethod achieves a maximum random access success rate of 94.15% and a minimum average access delay of 12.5ms.

Key words： four-step random access； propagation delay； network delay control； processing delay； 5Gcommunication environment；contention delay

5G技术的兴起与应用，推动着数字化时代的发展，使得超低时延通信逐渐成为智能社会的基础所在。（剩余7044字）