| 摘要 |
<p>There is provided a method for a mobility management entity MME (MME_1 ) in a pool of MMEs (MME_1; MME_2; MME_3) being adapted for communicating with at least one other MME (MME_2) in the pool of MMEs the MME (MME_1 ) moreover being adapted for communicating with a serving gateway SGW (S_GW) the MME (MME_1 ) managing the mobility of user entities (UE) for establishing packet data communication between the serving gateway and user entities UEs via at least a base station (eNB). The method comprises the steps of establishing (400) a UE context for a user entity; appointing (404) a back up MME for holding a duplicate context of the user entity; informing (406) the SGW in which MME a duplicate context is held or is to be held; and transmitting (408) a duplicate context to the appointed MME. Further a method for serving gateway SGW is provided as well as MME and a SGW.</p> |
