Overload processing method and system for mobility management entity

Abstract

The invention discloses an overload processing method for a mobility management entity, the method comprises the following steps: when UE (user equipment) registered in the overload MME (mobility management entity ) requests to access the overload MME, completing an establishing process of RRC (radio resource control) with the UE; establishing types and overload operation types of the MME according to business of the UE, and judging whether to reject the business of the UE accessing the overload MME or not; guiding the UE which has registered in the overload MME and is rejected accessing the UE to other normal MMEs to carry out business access by a process of load redistribution. The invention further discloses an evolution base station, by adopting the method and the base station, the UE registered in the overload MME can still carry out normal business access when the MME is overloaded.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and system for handling overload of a mobility management entity. Background technique [0002] When the Mobility Management Entity (MME) is under abnormal conditions, such as hardware and / or software failure, the MME may be overloaded. When overload occurs, the MME achieves load balancing among evolved base stations (eNode B, eNB for short) connected to the MME through the S1 interface through the "overload start" process of the S1AP protocol. [0003] The specific load balancing process is as follows: figure 1 as shown, [0004] First, the overloaded MME1 initiates the overload start process, and sends an overload start message to the eNode B connected to it. The overload start message can carry the overload operation type after the MME is overloaded, so as to control the eNode B to limit the UE's service access overload MME, including the following t...

AI Technical Summary

Problems solved by technology

[0011] From the processing of overloaded MME in the prior art, it can be seen that for a UE that has registered with an overloaded MME, the eNodeB may reject the UE’s access according to the service type requested by the UE and the overloaded operation type of the MME, which will seriously affect Feelings of UE users registered with the MME

According to different overload operations, the lightest overload treatment is to reject data service access, resulting in the UE being unable to perform data services before the overload is lifted; the strongest overload treatment is only accepting emergency service access, resulting in the UE being unable to perform data services before the overload is lifted Carry out tracking area update, short message and other services; in short, after the MME is overloaded, the existing technology cannot guarantee that the UE registered in the overloaded MME can perform normal service access

Images