TRACKING AREA MANAGEMENT METHOD AND APPARATUS FOR LONG TERM EVOLUTION TELECOMMUNICATION SYSTEMS

摘要

An MME keeps track of the network tracking mobility characteristic by periodically updating a TA transition probability matrix, which is derived from a global table that maintains data of UE movement in the network by noting the current TA and most recently known previous TA of each EU for every TAU event and paging event. The MME also maintains data as to the number of paging events and TAUs performed by each UE and stores a paging ratio versus TAU for each UE. The UE characteristics, UE paging ratio, and network mobility characteristic are utilized in an algorithm that constructs a TA list for each UE designed to minimize the overall traffic cost function for paging events and TAU events for that UE and for the overall network. Optionally, the TA list for each EU may be constrained to meet certain minimum performance characteristics such as a predetermined paging success rate target and/or a predetermined delay bound target.