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Method and system for regenerating key in cell during failed switching

A key generation and re-generation technology, applied in the field of communication, can solve the problems of increasing air interface signaling overhead, reducing system efficiency, increasing call drop rate, etc., to achieve the goal of reducing signaling overhead, improving timeliness, and reducing call drop rate Effect

Active Publication Date: 2013-04-03
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Through the above process, it can be seen that after the intra-cell handover fails, it is necessary to perform another intra-cell handover during the connection reconfiguration process to achieve K eNB regeneration such that K eNB The update delay, and increase the air interface signaling overhead, reduce system efficiency, and increase the drop rate

Method used

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  • Method and system for regenerating key in cell during failed switching
  • Method and system for regenerating key in cell during failed switching
  • Method and system for regenerating key in cell during failed switching

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Embodiment Construction

[0029] In the embodiment of the present invention, when the intra-cell handover of the UE fails, during the RRC connection re-establishment process, the UE is regenerated according to Kasme eNB , thereby avoiding the process of intra-cell handover again during the RRC connection reconfiguration process, and improving the regeneration of K eNB efficiency and reduce air interface signaling overhead.

[0030] see figure 1 , the communication system in this embodiment includes a UE and an eNB.

[0031] The eNB is used to send an RRC connection reconfiguration message to the UE to initiate intra-cell handover; receive the RRC connection re-establishment request sent by the UE, and learn that the UE intra-cell handover failed; and generate and send an RRC connection re-establishment message (RRC Connection Reestablishment) to instruct the UE to regenerate the key K according to the intermediate key Kasme in the AKA process eNB . Wherein, the RRC connection re-establishment messa...

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Abstract

The invention discloses a method for regenerating a key in a cell during failed switching, and is used for improving the efficiency for regenerating KeNB and reducing the expenditure for null signaling. The method comprises the following steps that: an evolved node base eNB transmits a radio resource control RRC connection reconfiguration message to user equipment UE to initiate the switching in the cell, and the eNB interacts the information for the switching in the cell with the UE; the eNB receives an RRC connection reestablishment request transmitted by the UE under the condition that theswitching in the UE cell is failed; and the eNB generates and transmits the RRC connection reestablishment message to instruct the UE to regenerate the key KeNB according to an intermediate key Kasmein the authentication AKA process. The invention also discloses a system for implementing the method.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and a system for regenerating a key when handover fails in a cell. Background technique [0002] In the long-term evolution (LTE) system, when the user equipment (UE) performs handover between evolved base stations (eNBs), it needs to use the key K eNB for security verification. K is generated during the initial generation of the context eNB . When the authentication process (AKA) ends, the Mobility Management Entity (MME) is triggered to recalculate the intermediate key Kasme, thereby regenerating K according to Kasme eNB . Then the MME initiates the UE context modification process, by sending the UE context modification request (UE CONTEXT MODIFICATION REQUEST) to the eNB, the regenerated K eNB sent to eNB. After receiving the UE context modification request, the eNB sends a radio resource control (RRC) connection reconfiguration message (RRC Connection Reconfiguration)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/14H04W12/04H04W12/06H04W36/08H04W76/02H04W12/041
Inventor 吴艳军
Owner DATANG MOBILE COMM EQUIP CO LTD