Computer Networking › Section G · Wireless and mobile networks › Topic G.6

Mobility management in practice

Cellular networks put the principles of home networks, tunnels and indirect routing to work billions of times a day. Following one phone through attachment, roaming and handover shows how, and Mobile IP shows the same ideas built for the internet.

In this topic

  • One phone, four stages
  • Association and control-plane set-up
  • Data-plane tunnels: home routing
  • Why and when to hand over
  • The handover, step by step
  • Worked example: what changes in a handover
  • Worked example: how often a train hands over
  • Mobile IP: the internet's version
  • Why Mobile IP saw little use
  • Common mistakes to avoid
  • Key takeaways

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