Decryption device and method for radio resource control (RRC) signaling

A signaling and key technology, which is applied in the application field of mobile communication, communication network protocol monitoring and analysis technology, and can solve the problem of inability to realize RRC message decryption.

Inactive Publication Date: 2013-01-23
BEIJING ZHONGCHUANG TELECOM TEST
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Problems solved by technology

[0008] The disadvantage of such a technical solution applied to the monitoring and analysis of the LTE network protocol is that the network structure, interface, and protocol of the LTE network system have undergone great changes compared with the UMTS network system, and it is not possible to simply extract information from an interface. It can realize the decryption of messages, which is mainly refl

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  • Decryption device and method for radio resource control (RRC) signaling
  • Decryption device and method for radio resource control (RRC) signaling
  • Decryption device and method for radio resource control (RRC) signaling

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[0068] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0069] During the monitoring and analysis of the LTE protocol, this technical solution can realize the decryption function of the captured RRC signaling interacted between the mobile terminal UE and the eNodeB entity when the UE is not handover, and the decrypted RRC signaling includes uplink and downlink directions All encrypted RRC signaling.

[0070] Such as image 3 As shown, the part in the box is a composition structure diagram of the device of the present invention, described as follows;

[0071] The part outside the box is a schematic diagram of the LTE network structure, and the arrows i...

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Abstract

The invention discloses a decryption method and a decryption device for radio resource control (RRC) signaling. The method comprises the following steps of: extracting an RRC decryption parameter and user equipment (UE) identification information from a message related to the security of a US access layer; establishing an RRC message decryption parameter data structure by utilizing the UE identification information; assigning members of the RRC message decryption parameter data structure, and deducing key information required by RRC decryption; and finding the RRC message decryption parameter data structure by utilizing the UE identification information, and decrypting an encrypted RRC message by utilizing the key information in the data structure, serial number (SN) information in a packet data convergence protocol (PDCP) protocol data unit (PDU) bearing the RRC message, the bearer information of the RRC message and the transmission direction information of the RRC message. According to the method and the device, the captured encrypted RRC message can be decrypted by a protocol monitoring analysis system without the related configuration of a long term evolution (LTE) network and the pre-configuration of the protocol monitoring analysis system for the LTE network for UE decryption related data.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular 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 protocol of the LTE system have also undergone great changes. The schematic diagram of the LTE network structure is as follows. [0003] Such as figure 1 As shown, the wireless access part of the LTE system is composed of a node such as eNodeB, the core network part is mainly composed of MME entity, S-GW (ServingGateway) entity, PDNGateway entity and PCRF entity, etc., and HSS is a shared entity of al...

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Application Information

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IPC IPC(8): H04W12/02H04W12/04H04W76/00H04W12/041
Inventor 刘元凯贾宇航张立王升平李春林
Owner BEIJING ZHONGCHUANG TELECOM TEST
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