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Key updating method, equipment and system for switching base station eNB in LTE (Long Term Evolution) system

A key update and key technology, applied in the field of communication, can solve the problems of not being able to obtain, eavesdropping on communication content, etc., and achieve the effect of good security

Active Publication Date: 2010-07-07
CHINA MOBILE COMM GRP CO LTD
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  • Summary
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0066] In the X2-handover key derivation scheme proposed by TR33.401, it only has two-hop security, that is, if the attacker controls the source eNB, he cannot obtain the updated key of the UE after another handover (X2 or S1 handover). Key K eNB , but since the secret information used by the target eNB in ​​deriving the new key is obtained from the source eNB, the attacker can obtain the secret information to derive the new key K of the user UE after this X2 handover eNB (K eNB ** ), and then eavesdrop on the communication content of the UE after handover
[0067] The flaws of the above-mentioned two-hop security are sometimes very prominent

Method used

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  • Key updating method, equipment and system for switching base station eNB in LTE (Long Term Evolution) system
  • Key updating method, equipment and system for switching base station eNB in LTE (Long Term Evolution) system
  • Key updating method, equipment and system for switching base station eNB in LTE (Long Term Evolution) system

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Embodiment Construction

[0094] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0095] Such as image 3 As shown, in the embodiment of the present invention, the key update process during the handover of the LTE base station eNB of the long-term evolution system may include:

[0096] Step 301. After receiving the handover request message from the source eNB, the target eNB transmits the NCC carried in the handover request message to the mobility management entity MME.

[0097] Step 302, the MME increments the received NCC, performs the first NH synchronization, increments the received NCC again, performs the second NH synchronization, and returns the results of the two NH synchronizations and the corresponding NCC to the target eNB. In the implementation, the increment of the received NCC can be incremented by a fixed-length value, that is, a fixed value is increased each time, and the value is a natural number. Of course, if it ...

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Abstract

The invention discloses a key updating method for switching a base station eNB in a long term evolution (LTE) system. The method comprises the following steps of: after a target eNB receives a switching request message of a source eNB, transmitting an NCC (Network Control Center) carried by the switching request message to an MME (Mobility Management Entity); progressively increasing the received NCC by the MME for carrying out NH synchronization for the first time; progressively increasing the received NCC once again for carrying out NH synchronization for the second time; returning results of the twice NH synchronization and a corresponding NCC to the target eNB; calculating KeNB* by the target eNB according to the result of the NH synchronization for the first time; and updating the KeNB according to the KeNB* and deducing RRC (Radio Resource Control) and UP keys. The invention also discloses an eNB in the long term evolution (LTE) system, an MME and the long term evolution (LTE) system. The invention can have forward safety of one hop during updating keys, and in the view of a user, the invention provides better security guarantee on the basis of not reducing the operation efficiency.

Description

technical field [0001] The present invention relates to the technical field of communications, and in particular to a key update method, device and system when a base station eNB is switched in an LTE system. Background technique [0002] The fourth-generation mobile communication LTE network has good performance (bandwidth and accommodated services, etc.), so it has a good market prospect. However, the technology is currently in the research and development stage, and many details are not yet mature. [0003] In the LTE network model, there are several logical communication entities: terminal mobile users (UE: UserEquipment, user equipment), including mobile devices and USIM (UMTS Subscriber IdentityModule, UMTS user identity module; UMTS: Universal Mobile TelecommunicationSystem, universal mobile Communication system) card; eNB (base station) site serving wireless communication with users; entity MME (Mobility Management Entity, mobile management entity) that manages mult...

Claims

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Application Information

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IPC IPC(8): H04W36/08H04W36/30H04W12/04
Inventor 朱红儒齐旻鹏杨笑
Owner CHINA MOBILE COMM GRP CO LTD
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