Chapter 6 Wireless and Mobile Networks - Network and Systems Lab
Chapter 6 Wireless and Mobile Networks - Network and Systems Lab
Chapter 6 Wireless and Mobile Networks - Network and Systems Lab
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GSM: h<strong>and</strong>off with common MSC<br />
old BSS<br />
1<br />
VLR<br />
8<br />
<strong>Mobile</strong><br />
Switching<br />
Center<br />
4<br />
2<br />
7<br />
5 6<br />
3<br />
new BSS<br />
1. old BSS informs MSC of impending<br />
h<strong>and</strong>off, provides list of 1 + new BSSs<br />
2. MSC sets up path (allocates resources)<br />
to new BSS<br />
3. new BSS allocates radio channel for<br />
use by mobile<br />
4. new BSS signals MSC, old BSS: ready<br />
5. old BSS tells mobile: perform h<strong>and</strong>off to<br />
new BSS<br />
6. mobile, new BSS signal to activate new<br />
channel<br />
7. mobile signals via new BSS to MSC:<br />
h<strong>and</strong>off complete. MSC reroutes call<br />
8 MSC-old-BSS resources released<br />
6: <strong>Wireless</strong> <strong>and</strong> <strong>Mobile</strong> <strong><strong>Network</strong>s</strong> 6-64
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