Device and method for decrypting NAS (Network Attached Storage) signaling in LTE (Long Term Evolution) protocol monitoring analysis

A protocol and signaling technology, applied in the application field of communication network protocol monitoring and analysis technology, can solve the problems of unable to realize message decryption, unable to apply LTE network protocol monitoring and analysis, etc.

Inactive Publication Date: 2012-05-02
北京信威科技集团股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Such a technical solution cannot be applied to the monitoring and analysis of LTE network protocols because of the following defects: Compared with the UMTS network system, the network structure, interface, and protocol of the LTE network system have undergone great changes. By extracting the info

Method used

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  • Device and method for decrypting NAS (Network Attached Storage) signaling in LTE (Long Term Evolution) protocol monitoring analysis
  • Device and method for decrypting NAS (Network Attached Storage) signaling in LTE (Long Term Evolution) protocol monitoring analysis
  • Device and method for decrypting NAS (Network Attached Storage) signaling in LTE (Long Term Evolution) protocol monitoring analysis

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Embodiment Construction

[0075] When monitoring and analyzing the LTE protocol, the technical solution can realize the decryption function of captured NAS messages exchanged between the mobile terminal UE and the MME entity, and the NAS messages include all encrypted NAS messages in the uplink and downlink directions.

[0076] Such as image 3 As shown, the part in the box is a structural diagram of the device of the present invention. Among them, the block part describes the structural block diagram of the NAS message decryption device, and the part other than the block is a schematic diagram of the LTE network structure. The arrows in the figure describe the input and output of the device and the constituent modules of the present invention.

[0077] The NAS message decryption device consists of three parts: a NAS message decryption parameter extraction module, a NAS message decryption parameter storage and maintenance module, and a NAS message decryption execution module. Among them, the functions...

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Abstract

The invention provides a device for decrypting an NAS (Network Attached Storage) signaling in LTE (Long Term Evolution) protocol monitoring analysis. The device comprises three parts: an NAS message decrypting parameter extracting module, an NAS message decrypting parameter storage maintaining module and an NAS message decrypting executing module. According to the technical scheme of the invention, the information related to UE (User equipment) safety is extracted from specific information on a S1-MME, S10 or S6a interface and is used for establishing, educing and maintaining the related parameters, such as a key, and the like, needed for decrypting the NAS information. Under the conditions of being free from changing the related configuration of an LTE network and configuring the data related to UE decryption for an LTE network protocol monitoring analysis system in advance, an operation of the protocol monitoring analysis system for decrypting the captured encrypted NAS information can be realized.

Description

technical field [0001] The invention belongs to the application field of communication network protocol monitoring and analysis technology. Background technique [0002] As an evolution technology of 3G (Third Generation), LTE can not only provide higher data rate and capacity, larger coverage, but also reduce service delay and system operating cost, which is beneficial for operators to launch more real-time, High-speed services, thereby attracting more high-end users. Compared with the UMTS system, the network structure and protocols of the LTE system have also undergone great changes. The schematic diagram of the LTE network structure is shown in figure 1 shown. [0003] The wireless access part of the LTE system is composed of a node called Enhanced Node B (Enhanced Node B), and the core network part is mainly composed of a Mobility Management Entity (MME), an S-GW (Serving Gateway) entity, and a packet data network gateway ( Packet DataNetwork Gateway, PDNGateway) ent...

Claims

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Application Information

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IPC IPC(8): H04W12/02H04W24/00
CPCH04W24/00H04W12/02H04L63/0428H04W12/033
Inventor 贾林刘元凯李春林朱明新张立王升平刘继秋
Owner 北京信威科技集团股份有限公司
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