摘要
针对现有网络时延控制方法存在的前导码碰撞率高、终端用户随机接入成功率低、用户平均接入时延长等不足,在5G通信环境下提出一种基于四步随机接入的控制方法。确定5G通信中的随机接入时延、传播时延、处理时延与竞争时延并构建5G网络时延控制架构;结合队列干扰率实现前导码队列的自适应分配,通过媒体接入控制(medium access control,MAC)层抑制前导码碰撞和最大重传次数,同步制定资源调度层的资源抢占程序,并合理调度接入资源的顺序,并实现资源层的跨层交互,有效控制网络时延。实验结果显示:提出控制方法下的终端用户随机接入成功率最大值达到了94.15%,用户平均接入时延最小值达到了12.5 ms。
To address the shortcomings of existing network delay control methods—such as high preamble collision 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 allocating preamble sequences based on queue interference rate,the scheme reduces preamble collisions and minimizes the maximum number of retransmissions at the medium access control(MAC)layer.Simultaneously,a resource preemption procedure is implemented at the resource scheduling layer to rationally manage the order of access resource allocation and achieve cross-layer interaction at the resource layer,thereby effectively controlling network delay.Experimental results show that the proposed method achieves a maximum random access success rate of 94.15%and a minimum average access delay of 12.5 ms.
作者
曾伟忠
ZENG Weizhong(Engineering Training Center,Putian University,Putian 351100,China)
出处
《邵阳学院学报(自然科学版)》
2025年第6期31-38,共8页
Journal of Shaoyang University:Natural Sciences Edition
基金
2022年莆田学院校内科研项目(2022018)。
关键词
四步随机接入
传播时延
网络时延控制
处理时延
5G通信环境
竞争时延
four-step random access
propagation delay
network delay control
processing delay
5G communication environment
contention delay
