论文标题
通用虚拟网络接口下WiFi和LIFI之间切换的性能评估
Performance evaluation of switching between WiFi and LiFi under a common virtual network interface
论文作者
论文摘要
我们考虑由WiFi和Lifi接入点（AP）和无线设备组成的混合无线局域网。每个设备都通过唯一的IP地址在网络中识别，该虚拟网络接口是通过通过市售产品实现的WiFi和Lifi物理接口来获得的虚拟网络接口。我们测量在接口键合驱动程序使用的机制的不同设置下，在两个物理接口之间切换的时间及其对交通流量的影响。考虑开关的不同特定的触发事件，即：（模拟的）接口故障或意外关闭，信号丢失和手动（意图）开关。我们的实验结果表明，不同类型的触发事件会影响重新配置当前活跃的物理接口所需的时间（虚拟界面用于发送/接收数据），连接恢复时间从几十毫秒到几秒钟。这需要在活动流量上丢失数据包损失，在最坏的情况下，我们在1秒内最大损失了多达1％的流量的损失。
We consider a hybrid wireless local area network composed of both WiFi and LiFi Access Points (AP) and wireless devices. Each device is identified in the network by a unique IP address, using a virtual network interface obtained by bonding the WiFi and LiFi physical interfaces, implemented through commercially available products. We measure the time it takes to switch between the two physical interfaces and its impact on the traffic flow, under different settings of the mechanisms used by the interface bonding driver. Different specific triggering events are considered for the switch, namely: an (simulated) interface malfunctioning or unintended shutdown, a signal loss, and a manual (intended) switch. Our experimental results show that the different types of triggering events have an impact on the time it takes to reconfigure the currently active physical interface (which is used by the virtual interface to send/receive data), with connection recovery times ranging from few tens milliseconds to few seconds. This entails a packet loss on active flows which, in the worst case, we quantify in a maximum loss of up to 1% of the traffic flowing during 1 second.
