Importance

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Abstract

A method for setting up an inbound call to a mobile telephone MS in a cellular mobile telephone network. In the method, a mobile switching center (MSC) requests a home location register (HLR) to provide call routing information, the home location register (HLR) in turn requesting routing information from the visitor location register (VLR) within the location area of which the mobile telephone is currently located, and forwards the received roaming number to the switching center (MSC) for routing the call to the switching center of the current location area and further to the called mobile telephone. To avoid superfluous signalling, when the HLR detects a call transfer operation activated for a respective MS to a call transfer number, the HLR initiates independently a new roaming number request with this call transfer number at least in the case that the call transfer number belongs to another MS in the same HLR.

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First Claim