| 摘要: |
| 针对数据分组优先级阈值固定设置的问题，提出了一种优先级阈值自适应设置方法。该方法通过理论推导ALOHA协议脆弱周期概率、单节点成功发送概率，得到网络节点个数为M、数据传输速率为c条件下的信道占用统计值，再基于数据分组业务比例递推得到各优先级阈值。仿真结果表明，信道占用率为60%时，所提方法相对于固定设置方法，吞吐量提高了23%，传输时延缩短了6%；相对于动态设置方法，吞吐量提高了12%，传输时延缩短了4%。该方法能够根据网络参数自适应调整优先级阈值，准确反映网络的真实状态，提高了网内节点信息传输的实时性和可靠性。 |
| 关键词: 高速机动平台 统计优先多址接入(SPMA)协议 优先级阈值 信道状态 |
| DOI：10.20079/j.issn.1001-893x.250414004 |
|
| 基金项目: |
|
| An Adaptive Setting Method for Priority Threshold of SPMA Protocol |
| ZHAO Zhiyong,PAN Yaozong,XU Jianwu |
| (School of Aviation Combat Service，Naval Aviation University，Yantai 264001，China) |
| Abstract: |
| A priority threshold adaptive setting method is proposed to solve the issue of fixed priority threshold settings for data grouping.Through theoretical derivation of the ALOHA protocol vulnerable period probability and single node successful transmission probability，the channel occupancy value is obtained under the condition of M network nodes and c data transmission rate.Then，each priority threshold is recursively obtained based on the proportion of data packet.The simulation results show that when the channel occupancy rate is 60%，the proposed method achieves a 23% increase in throughput and a 6% reduction in transmission delay compared with the fixed-setting approach，while demonstrating a 12% improvement in throughput and a 4% decrease in transmission delay relative to the dynamic-setting method.This method can adaptively adjust the priority threshold according to network parameters，accurately reflect the true state of the network，and improve the real-time performance and reliability of information transmission. |
| Key words: high-speed mobile platform statistical priority based multiple access(SPMA) protocol priority threshold channel state |
《电讯技术》编辑部 