METHOD FOR ROUTING CALLS IN A MOBILE COMMUNICATION NETWORK

摘要

A method for routing calls in a mobile communication network is useful for decreasing a frequency of failed calls. The method includes processing at a Home Location Register (HLR) (315) a call setup message for a call to a Mobile Station (MS). In response to the call setup message, a first request for a roaming number associated with the MS is transmitted from the HLR (315) to a first Mobile. Switching Center (MSC) (325). After a roaming number associated with the MS is not received from the first MSC (325) in response to the first request, a second request for a roaming number associated with the MS is transmitted from the HLR (315) to a second MSC (330).