Terminal abnormal procedure protection method and device

Abstract

The invention discloses a terminal abnormal procedure protection method. The method comprises a step of presetting a timer and duration of the timer; and the method further comprises the following steps: receiving a safety mode command message sent by a network side, entering a safety starting process, starting the timer, and performing integrity protection checking on the safety mode command message; continuously waiting for the safety mode command message sent by the network side if determining a fact that the safety mode is failed to start according to a checking result; and triggering a terminal to actively initiate a request of connection release if the timer is overtime in the waiting process. The invention further discloses a terminal abnormal procedure protection device.

Description

technical field [0001] The invention relates to security protection technology in the field of mobile communication, in particular to a terminal abnormal process protection method and device. Background technique [0002] In the mobile communication system, the Evolved Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial Radio Access Network) on the network side of the Long Term Evolution (LTE, Long Term Evolution) system mainly consists of an evolved base station (eNB, Evolved NodeB) and a core The mobile management entity (MME, Mobility Management Entity) of the network equipment is composed. The user equipment (UE, User Equipment) performs data and signaling interaction with the eNB and MME through the wireless air interface, and provides complete data and signaling for these interactions. sexual function and encryption function. [0003] In the LTE system architecture, the protocol layer is divided into the non-access stratum (NAS, Non Acce...

AI Technical Summary

Problems solved by technology

In this case, because the terminal does not have security enabled, there is no need to perform integrity protection check and decryption on the downlink message, so there will be no error of integrity protection failure, but the message obtained after decoding is garbled, making the terminal unrecognizable

At this time, the downlink message that cannot be decrypted and identified will be directly discarded by the terminal, and discarding the command on the network side may affect the entire service processing process; The air interface resources are released accordingly, but for the UE, it does not know that the air interface resources have been released, and after the release message sent by the network side is directly discarded because it cannot be parsed, the UE needs to continue to wait for other messages from the network side

At this point, unless the end user or business intervenes directly, the network side will not send any more messages, causing the terminal process to hang

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