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飞机上何时能打手机?权威专家:无技术障碍但成本高

2017-09-20 10:13:36   凤凰网

“事儿是个好事儿,但并不是规则一出,明天坐飞机就可以打电话了,还有漫长的路要走。”国家空管新航行系统技术实验室谢晋东博士在接受科技日报记者采访时说。

飞机上使用电子设备在国外已很普遍,但依然要求手机全程关机。我国民航对此严格控制,也主要缘于对运行安全的考虑。“相对电子设备来讲,手机对飞机飞行安全产生隐患的可能性更大。”谢晋东说。

谢晋东介绍,现有手机通信是所谓移动通信体制,发射信号需要有基站,但现在飞机机舱内尚未配备。如果不关闭手机或接打电话,需要手机用最大功率寻找基站,这容易导致个别工作异常的手机产生对飞机有害的干扰信号。飞机上通信导航系统要接收数百公里以外的信号,系统灵敏度特别高,即使是十分细微的干扰也会对飞行安全产生极大的影响。

“从技术上来讲,在飞机上打电话没有太多难度,理论上在飞机上增设一个移动基站即可实现。”谢晋东说,微蜂窝基站可以有效控制飞机上乘客手机信号的发射功率,解决潜在的杂波干扰问题。难点在于如何利用微蜂窝基站与地面通信网络实现宽带连接,现有的解决手段主要是使用卫星通信电路,但成本很高,而且存在信息安全隐患。

谢晋东认为,可以借助于正在制定标准的5G移动通信系统,有望直接实现航路上空信号的全覆盖,从而实现飞机到地面的宽带连接。

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