Patent ID: 8792898

Claim:
A method for distributing call-routing numbers for a mobile communication network, the mobile communication network comprising a switch including at least one cluster, the cluster comprising a plurality of cluster members, each cluster member capable of routing an incoming call, based on a temporary number associated with the call, either to a recipient subscriber served by the cluster member or to another cluster member, the method comprising: providing a number series comprising a plurality of call-routing numbers to be used by the cluster members to route incoming calls; distributing the call-routing numbers between the plurality of cluster members by using a first data structure that: has entries that are each addressable by a respective index number that can be combined with the number series to form a call-routing number; defines an amount of assignments equal to a length of the call-routing number series; only stores, at each entry, a cluster member identification associated with a respective call-routing number having one or more least significant digits that are equal to the index number of the entry; wherein each assignment uniquely associates a cluster member with one or more least significant digits of the numbers of the call-routing number series.