Hands-On High Performance Programming with Qt 5

Adapting to the current network connection type

A mobile device can be connected to different mobile network types (2G, 3G, 4G/LTE) or local networks such as WiFi or Bluetooth. These networks have different performance characteristics we must be aware of.

A WiFi connection has the biggest bandwidth and lowest battery costs of all those technologies, so we should try to use it for data transfers whenever possible, and we should decrease network activity if we switch from WiFi to the cellular network.

As 4G cellular networks can compete with WiFi on throughput and latency, they incur much higher battery costs. 3G and 2G networks offer much worse throughput and latency; however, they also require much less power. That means for us that because ...