| 摘要 |
A global location register (GLR) provides a proxy for visitor location registers to the home location registers to avoid updating of the external network with location update notifications upon transfer of a roaming user between visitor location registers. The standard GLR is extended by being configured with multiple addresses, has a soft shutdown procedure, has a blacklist mechanism, a searching facility for finding lost roaming users, and has a mechanism for overcoming ambiguities in local identification numbers assigned by visitor location registers.
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