This work quantitatively analyses vessel traffic service (VTS) communications in ports and suggests improvements for more efficient control of the service. For this purpose, analysis of VTS communications was performed on VHF channel 12 in Busan North Port, South Korea. This communications service follows the queue of M/G/1 (the arrivals have a Poisson distribution, the service time is characterized by a general distribution, and with a single server). The degree of congestion of the communication channel was shown as the utilisation rate of the queue, which was 67·7% at peak times and 29·6% at non-peak times. To reduce congestion in the communication channel, we propose to separate the peak time control channel, exclude passing reporting, and decrease the reporting time. With separation of the peak time control channel, the utilisation rate decreased by 41·1%. The utilisation rate decreased by 5·7% when passing reporting was omitted, and by 8·3% when reporting time was reduced by 60%. The results of this study can be used as basic policy data to improve VTS, including reinforcement of the VTS officer's role and adjustment of the control report contents.

中文翻译：

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基于排队论的港区通信分析与改进

这项工作定量分析港口的船舶交通服务 (VTS) 通信，并提出改进以更有效地控制服务。为此，在韩国釜山北港的 VHF 12 频道上对 VTS 通信进行了分析。该通信服务遵循 M/G/1 的队列（到达具有泊松分布，服务时间具有一般分布的特征，并且具有单个服务器）。通信通道的拥挤程度以队列的利用率表示，高峰时段为67·7%，非高峰时段为29·6%。为了减少通信信道的拥塞，我们建议分离高峰时间控制信道，排除通过报告，并减少报告时间。随着峰值时间控制通道的分离，利用率下降41·1%。省略及格报告时使用率降低5·7%，报告时间减少60%时使用率降低8·3%。本研究结果可作为完善VTS的基本政策数据，包括强化VTS官员的作用和调整控制报告内容。