Patent ID: 8214479

Claim:
A method of providing scalability and redundancy in a blade cluster of a telecommunication system, the blade cluster acting towards the telecommunication system as a single Mobile Switching Center (MSC) and comprising a plurality of server blades, a server blade offering MSC-Server functionality, the method comprising the steps of: receiving from the telecommunication system, a message relating to a subscriber, the message including a unique subscriber identifier; determining a first hash value utilizing the unique subscriber identifier; based on the first hash value, determining a first server blade of said blade cluster; determining a second hash value utilizing the unique subscriber identifier; and based on the second hash value, determining a second server blade of said blade cluster while excluding the first server blade, said second server blade serving the subscriber if the first server blade is unavailable; wherein the unique subscriber identifier is either an International Mobile Subscriber Identity (IMSI) or a Temporary Mobile Subscriber Identity (TMSI), and the determining steps determine the same first and second hash values regardless of whether the IMSI or the TMSI is received.