METHOD FOR ATTACHING E-UTRAN AND MOBILITY MANAGEMENT ENTITY

摘要

This application discloses a method of attaching to E-UTRAN and a mobility management entity so as to lower the time delay in attachment of a user equipment to the network and improve the efficiency of attachment. The method includes: a step A of retrieving at the network side context information of a user equipment upon reception of an Attach Request sent by the user equipment; a step B of performing at the network side an authentication procedure and a security procedure with the user equipment; a step C of establishing at the network side a tunnel with the user equipment for information transmission; and a step D of establishing at the network side a default bearer with the user equipment, wherein the step B and the step C are performed in parallel after the step A is performed successfully; and the step D is performed upon determining that the step B and the step C are performed successfully.