Patent ID: 9232440
Filing Date: 2016-01-05
CPC Classification: H04W

Claim Text:
1. A method for controlling overload by a mobility management entity (MME) in a wireless communication system, the method comprising: transmitting a location update request message to a home subscriber server (HSS) if a first terminal transmits a tracking area update (TAU) request message to the MME; receiving a location update reject message including an MME-backoff time and a load factor from the HSS if the system undergoes overload, wherein the MME-backtime is for blocking transmission of a request message to the HSS and the load factor is for indicating a minimum acceptable load from the MME; and starting a backoff timer corresponding to the MME-backoff time and rejecting the TAU request message of the terminal which is received before expiry of the backoff timer, wherein the MME-backoff time is configured based on a number of requests transmitted by the MME and a load degree for processing the requests by the HSS.