Computer Networking › Section G · Wireless and mobile networks › Topic G.7
Wireless and mobility: impact on higher layers
TCP, UDP and applications run unchanged over Wi-Fi, cellular and satellite links, yet they can perform very differently there. The reason is that wireless losses and delays send misleading signals to protocols designed for wires.
In this topic
- Same protocols, different behaviour
- TCP reads every loss as congestion
- Worked example: how loss limits TCP
- Fix one: recover locally
- Worked example: retries hide loss
- Fix two: smarter transport
- Fix three: split the connection
- Moving devices and changing addresses
- Worked example: TCP over a satellite
- Effects on applications
- Common mistakes to avoid
- Key takeaways
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