CN104936175B

CN104936175B - The method and apparatus of key updating are carried out under the communication environment of dual link

Info

Publication number: CN104936175B
Application number: CN201410109897.1A
Authority: CN
Inventors: 邓云; 钱德瑞卡·沃拉尔
Original assignee: Nokia Shanghai Bell Co Ltd; Alcatel Optical Networks Israel Ltd
Current assignee: Nokia Shanghai Bell Co Ltd; Alcatel Optical Networks Israel Ltd
Priority date: 2014-03-21
Filing date: 2014-03-21
Publication date: 2018-11-16
Anticipated expiration: 2034-03-21
Also published as: CN104936175A

Abstract

The present invention provides the method and apparatus for carrying out key updating in dual link communication environment.Wherein in a kind of method realized in MeNB, there is dual link between UE and MeNB and SeNB, method includes：In key updating to be carried out, the first RRC connection reconfiguration is sent to UE and sets message to notify UE to execute key updating and discharge SCG associated with SeNB；SeNB release request message is sent to SeNB to discharge the communication connection between SeNB and UE；It receives the SeNB from SeNB and discharges response message；After receiving the first RRC connection reconfiguration from UE and setting completion message, the SeNB addition request message for UE is sent to SeNB, to request SeNB to establish and the dual link of UE；Request message is added in response to SeNB, receives SeNB addition response message from SeNB to indicate that SeNB receives SeNB addition request message；The 2nd RRC connection reconfiguration, which is sent, to UE sets message；Message is set in response to the 2nd RRC connection reconfiguration, twoth RRC connection reconfiguration of the reception from UE, which is set, completes message.

Description

The method and apparatus of key updating are carried out under the communication environment of dual link

Technical field

The present invention is generally related to wireless communication field, more specifically, is related to for the communication environment in dual link The lower method and apparatus for carrying out key updating.

Background technique

In the cordless communication network of isomery, it will usually have the biggish macro base station of coverage area and comparatively coverage area Lesser micro-base station.Fig. 1 shows the schematic diagram of cordless communication network 100 in the prior art.As shown in Figure 1, in channel radio Include a macro base station 110 in communication network 100, provides the basic network coverage 120, and one or more with smaller The micro-base station 132,134,136 and 138 of power provides relatively small 142,144,146 and 148 (figure of the network coverage respectively It is middle to be marked with backslash), macro base station 110 is connect with one or more micro-base stations by backhaul link.In macro base station and micro- base The user equipment (UE) 150 collectively covered in range stood can simultaneously with macro base station 110 and corresponding micro-base station (such as micro-base station 134) communication connection is established, such case is referred to as " dual link ".

More typically for property, dual link refer to given UE under wireless heterogeneous networks (RRC) connection use with unreasonably Think the operation for the radio resource that at least two different nexus (such as two base stations) of backhaul link connection provide.The two Base station may be respectively referred to as master base station (Master eNB, abbreviation MeNB) and prothetic group station (Secondary eNB, abbreviation SeNB). The control Flat Architecture that wireless access network (RAN) has agreed to dual link is C1, that is, the radio resource between MeNB and SeNB After managing (RRM) orthofunction, only MeNB generates the final RRC information that be sent to UE, and UE is also only sent to MeNB RRC information；User plane framework is 1A and 3C, and wherein 3C framework, which refers to, ends in MeNB by S1-U interface (i.e. MeNB is from core net Downlink data is received, and sends upstream data to core net), there is carrying to separate in MeNB, for isolated carrying (Split Bearer) uses independent wireless spread-spectrum technology (RLC) entity.Fig. 2 shows when using 3C user plane framework The schematic diagram of layer 2 (L2) structure in MeNB and SeNB, it can be seen that for isolated carrying, downlink data passes through PDCP layers After encryption, partial data (i.e. PDCP PDU) is sent to the RLC entity (SeNB positioned at SeNB according to certain criterion by MeNB Branch)；Another part data are sent to the RLC entity (MeNB branch) positioned at MeNB.MeNB and SeNB respectively will be obtained Partial data is sent to UE, and UE obtains complete data after the processing such as sequence.

Summary of the invention

As shown in Figure 2, when using 3C user plane framework under dual link environment, divide due to only existing in MeNB Group data converge (PDCP) layer, therefore need a security key only to encrypt to PDCP Packet Data Unit (PDU).So And since there are two base stations (MeNB and SeNB), key updating process will be related to two base stations, need to solve UE with Interaction problems between two base stations, and current specification only for key updating in a base station there is a situation where.Consider To the non-ideal backhaul link between MeNB and SeNB may cause long delay (unidirectional 2ms to 60ms), once MeNB need Key updating is executed, how to handle SeNB branch, when how really PDCP PDU and is sent to SeNB with new security key It surely the use of first PDCPPDU of new security key will be problem to be solved, therefore key updating process will be than working as The scheme of preceding single base station wants the more of complexity.

In order to solve these problems, the present invention provides under dual link communication environment, 3C user plane frame is used in UE When structure, the scheme of key updating is carried out.

According to the first aspect of the invention, it provides a kind of for being carried out in master base station in dual link communication environment The method of key updating, wherein there is dual links between user equipment (UE) and the master base station and a prothetic group station, described Method includes：In key updating to be carried out, to the UE send the first wireless heterogeneous networks (RRC) connection reconfiguration set message with Notify the UE to execute key updating and discharge secondary cell group (SCG) associated with the prothetic group station, wherein SCG refer to and The group of the associated server carrier in prothetic group station；It is described auxiliary to discharge that prothetic group station release request message is sent to the prothetic group station Communication connection between base station and the UE；It receives the prothetic group station from the prothetic group station and discharges response message, the prothetic group station Release response message is used to indicate the prothetic group station and has released communication connection with the UE；It is receiving from the UE The first RRC connection reconfiguration set complete message after, to the prothetic group station send for the UE prothetic group station addition request disappear Breath is used for requesting the prothetic group station to establish the dual link with the UE wherein the first RRC connection reconfiguration sets completion message Indicate that the key updating in the master base station has succeeded；Request message is added in response to the prothetic group station, from the prothetic group station Prothetic group station addition response message is received to indicate that the prothetic group station receives the prothetic group station addition request message, wherein the prothetic group Addition response message of standing includes the configuration information at the prothetic group station；The 2nd RRC connection reconfiguration, which is sent, to the UE sets message, it is described 2nd RRC connection reconfiguration sets the configuration information that message includes the prothetic group station；It sets and disappears in response to the 2nd RRC connection reconfiguration Breath, twoth RRC connection reconfiguration of the reception from the UE, which is set, completes message, and the 2nd RRC connection reconfiguration, which is set, completes message use In the configuration information for indicating that the UE has known the prothetic group station.

According to the second aspect of the invention, it provides a kind of for being carried out in master base station in dual link communication environment The method of key updating, wherein there is dual links between user equipment (UE) and the master base station and a prothetic group station, described Method includes：In key updating to be carried out, to the UE send the first wireless heterogeneous networks (RRC) connection reconfiguration set message with The UE is notified to execute key updating；Message is set in response to the first RRC connection reconfiguration, receives first from the UE RRC connection reconfiguration, which is set, completes message, is used to indicate in the master base station wherein the first RRC connection reconfiguration sets completion message Key updating has succeeded；It is close will occur to prothetic group station instruction that security key update instruction is sent to the prothetic group station Key updates；After receiving the first RRC connection reconfiguration and setting completion message, sent by GTP tunnel to the prothetic group station Specific cluster data cell (PDU) uses updated key with the PDU after indicating the specific PDU to the prothetic group station It is encrypted；The information that the prothetic group station is the radio resource that the UE is reconfigured is received from the prothetic group station；To the UE Send the 2nd RRC connection reconfiguration and set message, the 2nd RRC connection reconfiguration set message include the prothetic group station be the UE again The information of the radio resource of configuration；Message is set in response to the 2nd RRC connection reconfiguration, receives the 2nd RRC from the UE Connection reconfiguration, which is set, completes message, and the 2nd RRC connection reconfiguration, which is set, to be completed message and be used to indicate the UE and known the prothetic group The configuration information stood.

According to the third aspect of the present invention, it provides a kind of for being carried out in master base station in dual link communication environment The method of key updating, wherein there is dual links between user equipment (UE) and the master base station and a prothetic group station, described Method includes：In key updating to be carried out, security key update instruction is sent to refer to the prothetic group station to the prothetic group station Key updating will be occurred by showing；Specific cluster data cell (PDU) is sent to the prothetic group station by user plane, with to described Prothetic group station indicates that the PDU after the specific PDU is encrypted using updated key；It is received from the prothetic group station described auxiliary Base station is the information for the radio resource that the UE is reconfigured；RRC connection reconfiguration is sent to the UE and sets message, described in notice UE is executed and key updating and is reconfigured secondary cell group (SCG) associated with the prothetic group station, wherein SCG refer to it is described auxiliary The group of the associated server carrier in base station；Message is set in response to the RRC connection reconfiguration, receives the RRC connection from the UE Reconfigure and complete message, the RRC connection reconfiguration set complete message be used to indicate key updating in the master base station at Function.

According to the fourth aspect of the present invention, a kind of be used in dual link communication environment at user equipment (UE) is provided The middle method for carrying out key updating, wherein there is dual links between UE and master base station and a prothetic group station, it is described Method includes：The first wireless heterogeneous networks (RRC) connection reconfiguration is received from the master base station and sets message, wherein first RRC Connection reconfiguration sets message for notifying the UE to execute key updating and discharging secondary cell group associated with the prothetic group station (SCG), SCG refers to the group of server carrier associated with the prothetic group station；Updated key is obtained according to root key；To institute It states master base station and sends the first RRC connection reconfiguration and set and complete message, to indicate that the key updating in the master base station has been completed；From The master base station receives the 2nd RRC connection reconfiguration and sets message, and it includes the prothetic group station that the 2nd RRC connection reconfiguration, which sets message, Configuration information；Message is set in response to the 2nd RRC connection reconfiguration, the 2nd RRC connection reconfiguration is sent to the master base station and has set At message, to indicate that the UE has known the configuration information at the prothetic group station.

According to the fifth aspect of the present invention, a kind of be used in dual link communication environment at user equipment (UE) is provided The middle method for carrying out key updating, wherein there is dual links between UE and master base station and a prothetic group station, it is described Method includes：The first wireless heterogeneous networks (RRC) connection reconfiguration, which is received, from the master base station sets message, the first RRC connection Reconfiguration message is for notifying the UE to execute key updating；Updated key is obtained according to root key；In response to described One RRC connection reconfiguration sets message, sets to the first RRC connection reconfiguration of master base station transmission and completes message, wherein first RRC Connection reconfiguration sets the key updating that completion message is used to indicate in the master base station and has succeeded；Second is received from the master base station RRC connection reconfiguration sets message, and it includes the radio resource that the prothetic group station reconfigures that the 2nd RRC connection reconfiguration, which sets message, Information；Message is set in response to the 2nd RRC connection reconfiguration, completion is set to the 2nd RRC connection reconfiguration of master base station transmission and disappears Breath, to indicate the information of radio resource that the UE has known that the prothetic group station is reconfigured.

According to the sixth aspect of the invention, a kind of be used in dual link communication environment at user equipment (UE) is provided The middle method for carrying out key updating, wherein there is dual links between UE and master base station and a prothetic group station, it is described Method includes：Wireless heterogeneous networks (RRC) connection reconfiguration is received from the master base station and sets message, and the RRC connection reconfiguration, which is set, to disappear It ceases for notifying the UE to execute key updating and reconfiguring secondary cell group (SCG) associated with the prothetic group station, wherein SCG refers to the group of server carrier associated with the prothetic group station；Updated key is obtained according to root key；In response to described RRC connection reconfiguration sets message, sets to master base station transmission RRC connection reconfiguration and completes message, the RRC connection reconfiguration sets completion The key updating that message is used to indicate in the master base station has succeeded.

According to the seventh aspect of the present invention, it provides a kind of for being carried out in master base station in dual link communication environment The device of key updating, wherein there is dual links between user equipment (UE) and the master base station and a prothetic group station, described Device includes：First transmission unit, for sending the first wireless heterogeneous networks to the UE in key updating to be carried out (RRC) connection reconfiguration sets message to notify the UE to execute key updating and discharge secondary cell associated with the prothetic group station Group (SCG), wherein SCG refers to the group of server carrier associated with the prothetic group station；Second transmission unit is used for described auxiliary Base station sends prothetic group station release request message to discharge the communication connection between the prothetic group station and the UE；First receives list Member discharges response message for receiving the prothetic group station from the prothetic group station, and the prothetic group station release response message is used to indicate The prothetic group station has released the communication connection with the UE；Third transmission unit, for receiving from the UE's After first RRC connection reconfiguration sets completion message, the prothetic group station addition request message for the UE is sent to the prothetic group station, To request the prothetic group station that the dual link with the UE is added, wherein the first RRC connection reconfiguration, which is set, completes message for referring to Show that the key updating in the master base station has succeeded；Second receiving unit, for disappearing in response to prothetic group station addition request Breath receives prothetic group station addition response message from the prothetic group station to indicate that the prothetic group station receives the prothetic group station addition request and disappear Breath, wherein prothetic group station addition response message includes the configuration information at the prothetic group station；4th transmission unit is used for described UE sends the 2nd RRC connection reconfiguration and sets message, and it includes the prothetic group station with confidence that the 2nd RRC connection reconfiguration, which sets message, Breath；Third receiving unit receives the 2nd RRC from the UE and connects for setting message in response to the 2nd RRC connection reconfiguration It connects to reconfigure and completes message, the 2nd RRC connection reconfiguration, which is set, to be completed message and be used to indicate the UE and known the prothetic group station Configuration information.

According to the eighth aspect of the present invention, it provides a kind of for being carried out in master base station in dual link communication environment The device of key updating, wherein there is dual links between user equipment (UE) and the master base station and a prothetic group station, described Device includes：First transmission unit, for sending the first wireless heterogeneous networks to the UE in key updating to be carried out (RRC) connection reconfiguration sets message to notify the UE to execute key updating；First receiving unit, in response to described first RRC connection reconfiguration sets message, and first RRC connection reconfiguration of the reception from the UE, which is set, completes message, wherein first RRC connects It connects to reconfigure and completes the key updating that is used to indicate in the master base station of message and succeeded；Second transmission unit is used for institute It states prothetic group station and sends security key update instruction so that key updating will occur to prothetic group station instruction；Third transmission unit, For sending spy to the prothetic group station by user plane after receiving the first RRC connection reconfiguration and setting completion message Determine Packet Data Unit (PDU), with the PDU after indicating the specific PDU to the prothetic group station using updated key into Row encryption；Second receiving unit is the radio resource that the UE is reconfigured for receiving the prothetic group station from the prothetic group station Information；4th transmission unit sets message, the 2nd RRC connection reconfiguration for sending the 2nd RRC connection reconfiguration to the UE Setting message includes the information that the prothetic group station is the radio resource that the UE is reconfigured；Third receiving unit, in response to The 2nd RRC connection reconfiguration sets message, and twoth RRC connection reconfiguration of the reception from the UE, which is set, completes message, and described second RRC connection reconfiguration sets completion message and is used to indicate the configuration information that the UE has known the prothetic group station.

According to the ninth aspect of the present invention, it provides a kind of for being carried out in master base station in dual link communication environment The device of key updating, wherein there is dual links between user equipment (UE) and the master base station and a prothetic group station, described Device includes：First transmission unit, for sending security key update instruction to the prothetic group station in key updating to be carried out Key updating will occur to prothetic group station instruction；Second transmission unit, for passing through user plane to the prothetic group station It sends specific cluster data cell (PDU), is used with the PDU after indicating the specific PDU to the prothetic group station updated Key is encrypted；First receiving unit is the nothing that the UE is reconfigured for receiving the prothetic group station from the prothetic group station The information of line resource；Third transmission unit sets message for sending RRC connection reconfiguration to the UE, to notify the UE to execute Key updating and secondary cell group (SCG) associated with the prothetic group station is reconfigured, wherein SCG refers to and prothetic group station phase The group of associated server carrier；Second receiving unit is received for setting message in response to the RRC connection reconfiguration from described The RRC connection reconfiguration of UE, which is set, completes message, and the RRC connection reconfiguration, which is set, completes the key that message is used to indicate in the master base station Update has succeeded.

According to the tenth aspect of the present invention, a kind of be used in dual link communication environment at user equipment (UE) is provided The middle device for carrying out key updating, wherein there is dual links between UE and master base station and a prothetic group station, it is described Device includes：First receiving unit disappears for receiving the first wireless heterogeneous networks (RRC) connection reconfiguration from the master base station and setting Breath, wherein the first RRC connection reconfiguration sets message for notifying the UE to execute key updating and discharging and the prothetic group It stands associated secondary cell group (SCG), SCG refers to the group of server carrier associated with the prothetic group station；Key updating units, For obtaining updated key according to root key；First transmission unit, for sending the first RRC connection weight to the master base station Message is completed in configuration, to indicate that the key updating in the master base station has been completed；Second receiving unit is used for from the main base The 2nd RRC connection reconfiguration of reception of standing sets message, and it includes the prothetic group station with confidence that the 2nd RRC connection reconfiguration, which sets message, Breath；Second transmission unit sends the 2nd RRC to the master base station and connects for setting message in response to the 2nd RRC connection reconfiguration It connects to reconfigure and completes message, to indicate that the UE has known the configuration information at the prothetic group station.

According to the eleventh aspect of the present invention, a kind of be used in dual link communication environment in user equipment is provided (UE) device of key updating is carried out in, wherein there is dual link between UE and master base station and a prothetic group station, Described device includes：First receiving unit is set for receiving the first wireless heterogeneous networks (RRC) connection reconfiguration from the master base station Message, the first RRC connection reconfiguration set message for notifying the UE to execute key updating；Key updating units are used for root Updated key is obtained according to root key；First transmission unit, for setting message in response to the first RRC connection reconfiguration, to The first RRC connection reconfiguration of the master base station transmission, which is set, completes message, is used for wherein the first RRC connection reconfiguration sets completion message Indicate that the key updating in the master base station has succeeded；Second receiving unit connects for receiving the 2nd RRC from the master base station Reconfiguration message is connect, the 2nd RRC connection reconfiguration sets the information that message includes the radio resource that the prothetic group station reconfigures； Second transmission unit sends the 2nd RRC connection to the master base station for setting message in response to the 2nd RRC connection reconfiguration It reconfigures and completes message, to indicate the information of radio resource that the UE has known that the prothetic group station is reconfigured.

According to the twelfth aspect of the present invention, a kind of be used in dual link communication environment in user equipment is provided (UE) device of key updating is carried out in, wherein there is dual link between UE and master base station and a prothetic group station, Described device includes：Receiving unit sets message for receiving wireless heterogeneous networks (RRC) connection reconfiguration from the master base station, institute It states RRC connection reconfiguration and sets message for notifying the UE to execute key updating and reconfiguring associated auxiliary with the prothetic group station Cell group (SCG), wherein SCG refers to the group of server carrier associated with the prothetic group station；Key updating units are used for basis Root key obtains updated key；Transmission unit, for setting message in response to the RRC connection reconfiguration, to the master base station Transmission RRC connection reconfiguration, which is set, completes message, and the RRC connection reconfiguration, which is set, completes the key that message is used to indicate in the master base station Update has succeeded.

It, can be under dual link communication environment, when UE uses 3C user plane framework, effectively using the solution of the present invention Ground carries out key updating.

Detailed description of the invention

It, will be more preferable geographical after the description below with reference to a specific embodiment of the invention given by following drawings The solution present invention, and other objects of the present invention, details, features and advantages will become apparent.In the accompanying drawings：

Fig. 1 shows the schematic diagram of the network architecture in the prior art；

Fig. 2 shows the schematic diagrames of layer 2 (L2) structure when using 3C user plane framework in MeNB and SeNB；

Fig. 3 shows according to a first embodiment of the present invention for carrying out key updating under the communication environment of dual link The flow chart of method；

Fig. 4 show according to a second embodiment of the present invention for carrying out key updating under the communication environment of dual link The flow chart of method；

Fig. 5 show according to a third embodiment of the present invention for carrying out key updating under the communication environment of dual link The flow chart of method；

Fig. 6 show according to a fourth embodiment of the present invention for carrying out key updating under the communication environment of dual link The flow chart of method；

Fig. 7 shows according to an embodiment of the invention for carrying out key in MeNB in dual link communication environment The schematic diagram of the device of update；

Fig. 8 shows in accordance with another embodiment of the present invention close for carrying out in MeNB in dual link communication environment The schematic diagram for the device that key updates；

Fig. 9 shows in accordance with another embodiment of the present invention close for carrying out in MeNB in dual link communication environment The schematic diagram for the device that key updates；

Figure 10 shows in accordance with another embodiment of the present invention close for carrying out in UE in dual link communication environment The schematic diagram for the device that key updates；

Figure 11 shows in accordance with another embodiment of the present invention close for carrying out in UE in dual link communication environment The schematic diagram for the device that key updates；

Figure 12 shows in accordance with another embodiment of the present invention close for carrying out in UE in dual link communication environment The schematic diagram for the device that key updates.

Wherein, in all the appended drawings, the same or similar label indicates there is identical, similar or corresponding feature or function Energy.

Specific embodiment

The preferred embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although showing the present invention in attached drawing Preferred embodiment, however, it is to be appreciated that may be realized in various forms the present invention without the embodiment party that should be illustrated here Formula is limited.On the contrary, thesing embodiments are provided so that the present invention is more thorough and complete, and can will be of the invention Range is fully disclosed to those skilled in the art.

The following specifically describes according to the present invention for carrying out each reality of key updating under the communication environment of dual link Apply example.In the following description, it is assumed that UE establishes dual link with MeNB and SeNB, and use 3C user plane frame Structure.MeNB from MME receive execute key updating instruction or MeNB independently determines progress key updating after, such as where Managing SeNB branch has different schemes.

With reference to Fig. 1, for example, UE can be the UE 150 in Fig. 1, MeNB can be the macro base station 110 in Fig. 1, and SeNB It can be the micro-base station 136 in Fig. 1.However, it will be understood by those skilled in the art that the present invention is not limited thereto, UE can be with Dual link is established with any two base station that it can be communicated, and macro base station 110 can be used as SeNB, and uses micro- base It stands as MeNB.

Fig. 3 shows according to a first embodiment of the present invention for carrying out key updating under the communication environment of dual link The flow chart of method 300.Wherein in method 300, MeNB is rebuild by SCG release and SCG to execute key updating.Method 300 execution process is as described below, it being understood, however, that some of which step can not be according to shown and described sequence It executes.

Step 301：UE establishes dual link with MeNB and SeNB, and the UE uses 3C user plane framework (i.e. MeNB and SeNB also uses 3C user plane framework).At this point, UE is in the dual link communication environment of MeNB and SeNB, make It is logical that data are carried out with an encryption key (such as encryption key as derived from the key KeNB1 before updating) and MeNB and SeNB Letter.The data transmission of wireless interface needs to use encryption method, specifically, being carried out based on the key KeNB1 before update to data Encryption, the method decrypted belong to the prior art, and this patent is not unfolded to describe.

Step 302：Mobile management entity (MME) in core net sends UE context modification request to MeNB, wherein wrapping (such as being known as key KeNB2) containing updated key, carries out key updating to trigger MeNB.

Here, UE context modification request is sent to MeNB to trigger for MeNB carries out key updating and carry out by MME Description, it will be appreciated by those skilled in the art that the present invention is not limited thereto.Key updating in MeNB can also be by MeNB It is autonomous to initiate, updated key KeNB2 is generated according to pre-defined rule by MeNB at this time.

Step 303：MeNB is fast when receiving the instruction of key updating (receiving updated key KeNB2) from MME Handoff scenario in fast triggering cell, and notify UE to execute key more by setting message to the first RRC connection reconfiguration of UE transmission New and release SCG associated with the SeNB.SCG (Secondary Cell Group, secondary cell group) refers to and SeNB phase The group of associated server carrier, server carrier refers to the carrier wave serviced for the UE herein, which may include one or more Server carrier.First RRC connection reconfiguration sets message can also be comprising the information of release SCG configuration.However, in another realization side In formula, the first RRC connection reconfiguration, which sets message, can not include the information of release SCG configuration, but UE is knowing switching within cell When, actively discharge SCG associated with the SeNB.

Here, MeNB by be arranged the first RRC connection reconfiguration set include in message key change indicator (such as will KeyChangeIndicator is set as true) to notify key updating to UE.And message is set in the first RRC connection reconfiguration In, SCG associated with SeNB is released.

Step 304：After receiving the first RRC connection reconfiguration and setting message, UE execution switching within cell, and according to Root key K_ASMEObtain updated key KeNB2.The root key usually all has stored in user equipment, and user equipment can To be obtained by Non-Access Stratum signaling and the information pre-saved by scheduled calculation method.Further, UE is according to this Updated key KeNB2 derived cipher key is simultaneously applied in signaling and data transmission.

Step 305：UE executes the random access procedure with MeNB.

Step 306：Message is set in response to the first RRC connection reconfiguration that step 303 receives, UE is performing key updating Later, completion message is set to the first RRC connection reconfiguration of MeNB transmission to have succeeded with the key updating indicated in MeNB.

Here, step 305 and 306 are described as two independent steps.It will be appreciated by those skilled in the art that root According to the different implementations of communication protocol, step 306 can independently be also possible to a sub-steps of step 305 with step 305. In fact, the random access procedure of UE performed by step 305 and MeNB and targeted key updating process relationship of the invention Less, it therefore is not described in detail.

In addition, MeNB receive UE context modification request in step 302 after (or MeNB independently determine to carry out it is close After key updates), SeNB release request message (as shown in the step 307 in Fig. 3) can also be sent to SeNB to discharge SeNB Communication connection between UE.Request message, SeNB release and the communication connection of UE are discharged in response to the SeNB and are sent out to MeNB Send SeNB to discharge response message (as shown in the step 308 in Fig. 3).

It is appreciated that step 307-308 can be executed parallel with step 303-306, or can be held before step 303 Row, as long as can know to execute after carrying out key updating in MeNB.

Step 309：It completes message and to learn close in MeNB when MeNB receives the first RRC connection reconfiguration from UE and sets When key update has succeeded, MeNB sends UE contextual modifications response message to MME, with the key updating into MME report MeNB Succeed.

However, it will be understood by those skilled in the art that the step it is not necessary to.Such as key updating by MeNB from In the implementation of main initiation, MeNB, which does not need to update to MME report key, to have succeeded.

So far, the key updating in MeNB and UE is realized, and the connection of UE and SeNB has also discharged.Next, will Re-establish the connection between UE and the SeNB.

Step 310：SeNB of the MeNB to SeNB transmission for the UE adds request message, to request the SeNB to establish and be somebody's turn to do The dual link of UE.

Step 311：SeNB carries out access control and receives the request to check whether, if received, sends to MeNB SeNB adds response message.Wherein, (i.e. SCG's matches confidence to the configuration information in SeNB addition response message comprising the SeNB Breath).

Step 312：MeNB sends the 2nd RRC connection reconfiguration to UE and sets message comprising the configuration information of SeNB.

Step 313：Message is set in response to the 2nd RRC connection reconfiguration in step 312, UE sends the 2nd RRC to MeNB and connects It connects to reconfigure and completes message, to indicate that UE has known the configuration information of SeNB.

Step 314：UE and SeNB executes random access procedure, to re-establish communication connection with SeNB.UE is in SeNB institute Random access is initiated in the server carrier of configuration, accesses SeNB.

Step 315：MeNB sends SeNB addition to SeNB and completes message, to have completed the doubly-linked to UE to SeNB instruction Connect configuration.

Step 316：After UE performs the random access procedure with SeNB, with updated key KeNB2 with SeNB is grouped data transmission.

As can be seen that in method 300, when MeNB determines or knows to carry out key updating, release UE and SeNB it Between communication connection, and after the key updating in UE and MeNB is all completed, rebuild the communication connection between UE and SeNB.

Different from the above method 300, the following method 400-600 is not discharged and is rebuild by SCG, passes through SCG It reconfigures, to realize the key updating in UE and MeNB in the case where not turning off the connection with SeNB.

In addition, in the description of method 400-600, for simplicity, not for some contents identical with method 300 It repeats again.It will be appreciated by those skilled in the art that some explanation and illustrations in method 300 can be suitable for method 400- 600。

Fig. 4 show according to a second embodiment of the present invention for carrying out key updating under the communication environment of dual link The flow chart of method 400.In method 400, MeNB executes key updating, and the number of UE pause and SeNB in MeNB first According to transmission until it receives and rebuilds rlc layer for SeNB and reset the random access trigger event of MAC layer.

In method 400, MeNB in control plane by indicating to SeNB transmission key updating and passing through the tunnel GPRS to assist Discuss the tunnel (GPRS Tunnelling Protocol, GTP) and send specific PDU to SeNB, to SeNB indicate key updating with And key updating comes into force in which PDU.The execution process of method 400 is as described below, it being understood, however, that some of which step It can not be executed as illustrated with described sequence.

Step 401：UE establishes dual link with MeNB and SeNB, and the UE uses 3C user plane framework.This When, UE be in in the dual link communication environment of MeNB and SeNB, using old encryption key (such as by the key before updating Encryption key derived from KeNB1) and MeNB and SeNB progress data communication.

Step 402：MME in core net sends UE context modification request to MeNB, wherein including updated key (such as being known as key KeNB2) carries out key updating to trigger MeNB.

Here, UE context modification request is sent to MeNB to trigger for MeNB carries out key updating and carry out by MME Description, it will be appreciated by those skilled in the art that the present invention is not limited thereto.Key updating in MeNB can be by MeNB master It is dynamic to initiate.

Step 403：After MeNB receives the instruction (receiving updated key KeNB2) of key updating from MME, rapidly Handoff scenario in triggering cell, and notify UE to execute key updating by setting message to the first RRC connection reconfiguration of UE transmission. Here, MeNB by be arranged the first RRC connection reconfiguration set include in message key change indicator (such as will KeyChangeIndicator is set as true) to notify key updating to UE.

Step 404：After receiving the first RRC connection reconfiguration and setting message, UE executes switching within cell, close according to root Key K_ASMEObtain updated key KeNB2, and the transmission of UE pause and SeNB.

Step 405：UE executes the random access procedure with MeNB.

Step 406：Message is set in response to the first RRC connection reconfiguration that step 403 receives, UE is performing key updating Later, completion message is set to the first RRC connection reconfiguration of MeNB transmission to have succeeded with the key updating indicated in MeNB.

Here, step 405 and 406 are described as two independent steps.It will be appreciated by those skilled in the art that root According to the different implementations of communication protocol, step 406 can independently be also possible to a sub-steps of step 405 with step 405. In fact, the random access procedure of UE performed by step 405 and MeNB and targeted key updating process relationship of the invention Less, it therefore is not described in detail.

In addition, MeNB receive UE context modification request in step 402 after (or MeNB independently determine to carry out it is close Key update after), can also by the X2 interface between MeNB and SeNB to SeNB send security key update instruction, with to Key updating (as shown in the step 407 in Fig. 4) will occur for SeNB instruction.

In addition, MeNB passes through GTP tunnel after UE sets completion message to MeNB transmission RRC connection reconfiguration in a step 406 Specific PDU is sent to SeNB, (such as step 408 institute in Fig. 4 at the time of to indicate that updated key KeNB2 comes into force to SeNB Show).

Herein, which can be the PDU with specific structure or content, so that SeNB is able to know that the spy PDCP PDU after fixed PDU is using updated encryption key (being exported by updated key KeNB2) come what is encrypted. That is, what the PDCP PDU before the specific PDU was encrypted using old encryption key (being exported by KeNB1), at this PDCP PDU after specific PDU is encrypted using new encryption key (being exported by KeNB2).It should be noted that for adopting It is carried with the separation of 3C framework, that RLC entity of the PDCP entity in MeNB into SeNB is sent is PDCPPDU；For SeNB In RLC entity, received is RLC service data unit (SDU).

Receiving security key update instruction (step 407) and the specific PDU (step in Fig. 4 in Fig. 4 from MeNB It is rapid 408) after, SeNB is that the UE reconfigures radio resource, and to MeNB notice SeNB be the wireless money that the UE is reconfigured Source (the step 409) in Fig. 4.For example, SeNB can distribute dedicated leader sequence for the UE.

Next in step 410：It completes message and to learn in MeNB when MeNB receives the RRC connection reconfiguration from UE and sets Key updating when having succeeded, MeNB sends UE contextual modifications response message to MME, with the key into MME report MeNB Update has succeeded.

So far, the key updating in MeNB and UE is realized, and SeNB has also learnt the update and made response.

Next, in step 411：MeNB sends the 2nd RRC connection reconfiguration to UE and sets message comprising SeNB is UE weight The information of the radio resource newly configured.Specifically, it includes that SeNB is distributed for the UE that the 2nd RRC connection reconfiguration, which sets message, Leader sequence.

Step 412：Message is set in response to the 2nd RRC connection reconfiguration in step 411, UE sends the 2nd RRC to MeNB and connects It connects to reconfigure and completes message, to indicate the information of radio resource that UE has known that SeNB is reconfigured.

Step 413：UE and SeNB executes random access procedure, to re-establish communication connection with SeNB.

Step 414：The key updating in MeNB is known in step 404 in UE and is received in a step 408 about SCG After the RRC connection reconfiguration of configuration sets message, know that the user plane of SeNB branch should be reestablished.It is for separation Data Radio Bearer (DRB) be SeNB branch execute rlc layer rebuild and reset its MAC layer.Rlc layer in SeNB branch and All data by old encryption keys in MAC layer will be dropped.SeNB can distinguish all by old after step 408 Encryption keys data and new encryption keys data.

Step 413 and step 414 can be executed parallel or sequentially be executed with any other.

Step 415：MeNB is reconfigured to SeNB transmission SCG and is completed message.Or MeNB sends prothetic group station to SeNB and modifies Response instruction SCG reconfigures completion, and this patent does not limit specific signaling title.

Step 416：After UE performs the random access procedure with SeNB, with updated key KeNB2 with SeNB is grouped data transmission (including uplink and downlink).After step 408, SeNB is received by updated encryption key The PDCP PDU of (being exported by updated key KeNB2) encryption.When SeNB discovery UE successful execution random access (step It is rapid 413) when, it sends new data to UE, and new data refers to after specific PDU SeNB from MeNB received data.

In step 414, UE is carried as SeNB branch for separation and executes rlc layer reconstruction after knowing key updating It is reseted with MAC layer.

In one implementation, UE can execute rlc layer reconstruction due to automatically determining there are key updating for SeNB branch It is reseted with MAC layer.

In another implementation, message is set by the RRC connection reconfiguration in step 411 and should be SeNB branch to UE instruction It executes rlc layer reconstruction and MAC layer is reseted.

Fig. 5 show according to a third embodiment of the present invention for carrying out key updating under the communication environment of dual link The flow chart of method 500.In method 500, MeNB executes key updating in MeNB first, and UE continues to pass with the data of SeNB It is defeated.When UE is synchronous with SeNB execution L2, it sends PDCP state report to MeNB again.

Identical with method 400, in method 500, MeNB is indicated by sending key updating to SeNB in control plane And specific PDU is sent to SeNB by GTP tunnel, indicates that key updating and key updating are raw in which PDU to SeNB Effect.Similar appended drawing reference indicates same or similar operation in method 400 and 500.

Difference between method 500 and method 400 essentially consists in：

1, in method 400, UE is after receiving RRC connection reconfiguration and setting message (step 403), the number of pause and SeNB According to transmission (step 404)；And in method 500, UE after receiving RRC connection reconfiguration and setting message (step 503), continue with The data of SeNB transmit (step 504).

2, in method 400, UE only carries out a PDCP state report (in figure not to MeNB in the rear of progress key updating Display)；And in method 500, due to not suspending the transmission of the data between UE and SeNB, when UE and SeNB is performed at random (implement rlc layer reconstruction and MAC layer weight for the SeNB branch of separation carrying when access procedure (step 513) is synchronized to execute L2 If), UE needs to send PDCP state report to MeNB again, so that MeNB has been able to determine whether during key updating process It is sent to the PDCP PDU (step 514) in Fig. 5 of UE.That is, UE has been carried out twice to MeNB in method 500 PDCP state report.

Alternatively, UE can continue with the data of SeNB transmit, until it executed in MeNB switching within cell it is rear to Until MeNB has sent PDCP state report, at this time UE with SeNB perform random access procedure with execute L2 it is synchronous when do not need PDCP state report is sent again.

Fig. 6 show according to a fourth embodiment of the present invention for carrying out key updating under the communication environment of dual link The flow chart of method 600.In method 600, after MeNB acquisition is synchronous with SeNB's, MeNB triggers UE to execute key more Newly.Meanwhile UE (that is, rlc layer of SeNB branch is rebuild and MAC layer is reseted) synchronous with SeNB execution L2.

Similar in method 400 and 500, in method 600, MeNB is by sending key more to SeNB in control plane It is new to indicate and specific PDU is sent to SeNB by GTP tunnel, indicate key updating and key updating at which to SeNB PDU comes into force.The execution process of method 600 is as described below, it being understood, however, that some of which step can not according to shown and Described sequence executes.

Step 601：UE establishes dual link with MeNB and SeNB, and the UE uses 3C user plane framework.This When, UE be in in the dual link communication environment of MeNB and SeNB, using old encryption key (by the key KeNB1 before updating Derived encryption key) and MeNB and SeNB progress data communication.

Step 602：MME in core net sends UE context modification request to MeNB, wherein including updated key (such as being known as key KeNB2) carries out key updating to trigger MeNB.

Step 603：After receiving UE context modification request in step 602 (or MeNB independently determine to carry out it is close After key updates), MeNB sends security key update instruction to SeNB by X2 interface between MeNB and SeNB with to SeNB Instruction will occur key updating (as shown in the step 603 in Fig. 6), and by GTP tunnel to SeNB send specific PDU with At the time of indicating that updated key KeNB2 comes into force to SeNB (as shown in the step 604 in Fig. 6).

Herein, which can be the PDU with specific structure or content, so that SeNB is able to know that the spy PDCP PDU after fixed PDU is using updated encryption key (being exported by updated key KeNB2) come what is encrypted. That is, the PDCP PDU before the specific PDU is encrypted using old encryption key (being exported by KeNB1), PDCP PDU after the specific PDU is encrypted using new encryption key (being exported by KeNB2).It should be noted that for It is carried using the separation of 3C framework, that RLC entity of the PDCP entity in MeNB into SeNB is sent is PDCPPDU；For RLC entity in SeNB, received is RLC SDU.

Receiving security key update instruction (step 603) and the specific PDU (step in Fig. 6 in Fig. 6 from MeNB It is rapid 604) after, SeNB is that the UE reconfigures radio resource, and to MeNB notice SeNB be the wireless money that the UE is reconfigured Source (the step 605) in Fig. 6.For example, SeNB can distribute dedicated leader sequence for the UE.

Later, MeNB triggers UE and carries out key updating, and makes UE synchronous with SeNB progress L2.

Step 606：Receive SeNB be UE reconfigure radio resource (after the step 605) in Fig. 6, MeNB to UE sends RRC connection reconfiguration and sets message to notify UE to execute key updating, and reconfigures SCG associated with the SeNB.

Here, MeNB by be arranged RRC connection reconfiguration set include in message key change indicator (such as will KeyChangeIndicator is set as true) to notify key updating to UE.And it sets in message, refers in the RRC connection reconfiguration Show and SCG associated with SeNB is reconfigured.

Step 607：After receiving the RRC connection reconfiguration and setting message, UE executes switching within cell, and close according to root Key K_ASMEObtain updated key KeNB2.

Next in step 608 and 609, UE is executed and the random access procedure of MeNB and SeNB respectively.

Step 610：Message is set in response to the RRC connection reconfiguration that step 606 receives, UE is performing the close of step 607 Key update and step 608 and 609 random access procedure after, to MeNB send RRC connection reconfiguration set complete message to indicate Key updating in MeNB has succeeded.Similar to above, step 610 can be independently executed with step 608, also may include in In step 608.

In step 611, UE is carried as SeNB branch for separation and executes rlc layer reconstruction after knowing key updating It is reseted with MAC layer.

In another implementation, message is set by the RRC connection reconfiguration in step 605 and should be SeNB branch to UE instruction It executes rlc layer reconstruction and MAC layer is reseted.

Next, in step 612：It completes message and to learn MeNB when MeNB receives the RRC connection reconfiguration from UE and sets In key updating when having succeeded, MeNB sends UE contextual modifications response message to MME, with close into MME report MeNB Key update has succeeded.

Step 613：MeNB is reconfigured to SeNB transmission SCG and is completed message.

Step 614：After UE performs the random access procedure with SeNB, with updated key KeNB2 with SeNB is grouped data transmission, that is, the data transmitted are to implement encryption, new encryption key with new encryption key It is exported by KeNB2, specific implementation encryption, the method decrypted belong to the prior art, are not unfolded to describe herein.

From the above, it can be seen that MeNB is sent by GTP tunnel to SeNB for method 300,400 and 500 At the time of specific PDU is to indicate to occur key updating.Before the specific PDU, PDCP PDU by old encryption keys, After the specific PDU, PDCP PDU is by new encryption keys.

In addition, UE, which needs to execute rlc layer for SeNB branch, to be rebuild and MAC layer weight for method 300,400 and 500 And if SeNB should be discarded in all data cached before the specific PDU.Can be set by RRC connection reconfiguration message come Notified to UE with execute the rlc layer of SeNB branch rebuild and MAC layer reset, or can by UE learn key updating it The rlc layer for executing SeNB branch automatically afterwards is rebuild and MAC layer is reseted, so that for isolated DRB between SeNB and UE Realize that L2 is synchronous.

Below with reference to Fig. 7-Figure 12 describe respectively each embodiment according to the present invention in master base station or by master base station The device 700-900 that MeNB the is realized and device 1000-1200 realized in UE or by UE.Wherein, device 700 can be with device 1000 cooperate, and device 800 can cooperate with device 1100, and device 900 can cooperate with device 1200.

Fig. 7 shows according to an embodiment of the invention for carrying out key in MeNB in dual link communication environment The schematic diagram of the device 700 of update.Wherein there is dual links between UE and master base station MeNB and a prothetic group station SeNB.

Device 700 includes the first transmission unit 710, for sending (303) first nothings to UE in key updating to be carried out Line resources control (RRC) connection reconfiguration sets message to notify UE to execute key updating and discharge secondary cell associated with SeNB Group (SCG), wherein SCG refers to the group of server carrier associated with SeNB；Second transmission unit 720, for being sent to SeNB (307) SeNB discharges request message to discharge the communication connection between SeNB and UE；First receiving unit 730, for receiving (308) SeNB from SeNB discharges response message, and SeNB release response message is used to indicate SeNB and has released with UE's Communication connection；Third transmission unit 740, in reception (306) to the first RRC connection reconfiguration from UE set completion message it Afterwards, (310) are sent to SeNB and adds request message for the SeNB of UE, to request SeNB to establish the dual link with UE, wherein the One RRC connection reconfiguration sets the key updating that completion message is used to indicate in MeNB and has succeeded；Second receiving unit 750, is used for Request message is added in response to SeNB, receives (311) SeNB addition response message from SeNB to indicate that SeNB receives SeNB addition Request message, wherein SeNB adds the configuration information that response message includes SeNB；4th transmission unit 760, for being sent to UE (312) the 2nd RRC connection reconfigurations set message, and the 2nd RRC connection reconfiguration sets the configuration information that message includes SeNB；Third receives single Member 770 receives (313) from the 2nd RRC connection reconfiguration of UE and sets completion for setting message in response to the 2nd RRC connection reconfiguration Message, the 2nd RRC connection reconfiguration set completion message and are used to indicate the configuration information that UE has known SeNB.

Fig. 8 shows according to another embodiment of the present invention for carrying out key in MeNB in dual link communication environment The schematic diagram of the device 800 of update.Wherein there is dual links between UE and master base station MeNB and a prothetic group station SeNB.

Device 800 includes：First transmission unit 810, for sending (403,503) to UE in key updating to be carried out First wireless heterogeneous networks (RRC) connection reconfiguration sets message to notify UE to execute key updating；First receiving unit 820, is used for Message is set in response to the first RRC connection reconfiguration, reception the first RRC connection reconfiguration of (406,506) from UE, which is set, completes message, In the first RRC connection reconfiguration set and complete the key updating that is used to indicate in MeNB of message and succeeded；Second transmission unit 830, For the instruction of (407,507) security key update being sent to SeNB key updating will occur to SeNB instruction；Third is sent Unit 840, for receive the first RRC connection reconfiguration set complete message after, by GTP tunnel to SeNB send (408, 508) specific cluster data cell (PDU) is added with the PDU after indicating specific PDU to SeNB using updated key It is close；Second receiving unit 850, for receiving the information that (409,509) SeNB is the radio resource that UE is reconfigured from SeNB；The Four transmission units 860 set message for sending (411,511) the 2nd RRC connection reconfiguration to UE, and the 2nd RRC connection reconfiguration, which is set, to disappear Breath is the information of the UE radio resource reconfigured comprising SeNB；Third receiving unit 870, in response to the 2nd RRC connection Reconfiguration message, reception the 2nd RRC connection reconfiguration of (412,512) from UE, which is set, completes message, and the 2nd RRC connection reconfiguration has been set The configuration information that UE has known SeNB is used to indicate at message.

In one implementation, UE suspends the data of (404) and SeNB when receiving the first RRC connection reconfiguration and setting message Transmission.

In another implementation, UE continues the number of (504) and SeNB when receiving the first RRC connection reconfiguration and setting message According to transmission, and in this realization, device 800 further includes：4th receiving unit 880, for connecing at random in UE and SeNB Enter process complete after, receive Packet Data Convergence Protocol (PDCP) state report of (514) from UE, with determine key more The data of UE are sent to during new process.

Fig. 9 shows according to another embodiment of the present invention for carrying out key in MeNB in dual link communication environment The schematic diagram of the device 900 of update.Wherein there is dual links between UE and master base station MeNB and a prothetic group station SeNB.

Device 900 includes：First transmission unit 910, for sending (603) to SeNB and pacifying in key updating to be carried out Full key updating instruction will be will occur key updating to SeNB instruction；Second transmission unit 920, for by GTP tunnel to SeNB sends (604) specific cluster data cell (PDU), is used with the PDU after indicating specific PDU to SeNB updated close Key is encrypted；First receiving unit 930, for receiving the letter that (605) SeNB is the radio resource that UE is reconfigured from SeNB Breath；Third transmission unit 940 sets message for sending (606) RRC connection reconfiguration to UE, to notify UE to execute key updating simultaneously And secondary cell group (SCG) associated with SeNB is reconfigured, wherein SCG refers to the group of server carrier associated with SeNB；The Two receiving units 950 receive (610) from the RRC connection reconfiguration of UE and set completion for setting message in response to RRC connection reconfiguration Message, RRC connection reconfiguration set the key updating that completion message is used to indicate in MeNB and have succeeded.

Figure 10 shows according to another embodiment of the present invention for carrying out key in UE in dual link communication environment The schematic diagram of the device 1000 of update.Wherein there is dual links between UE and master base station MeNB and a prothetic group station SeNB.

Device 1000 includes：First receiving unit 1010, for receiving (303) first wireless heterogeneous networks from MeNB (RRC) connection reconfiguration sets message, wherein the first RRC connection reconfiguration set message for notify UE execute key updating and discharge with The associated secondary cell group (SCG) of SeNB, SCG refer to the group of server carrier associated with SeNB；Key updating units 1020, For obtaining (304) updated key according to root key；First transmission unit 1030, for sending (306) first to MeNB RRC connection reconfiguration, which is set, completes message, has been completed with the key updating indicated in MeNB；Second receiving unit 1040, for from MeNB receives (312) the 2nd RRC connection reconfigurations and sets message, and the 2nd RRC connection reconfiguration sets the configuration information that message includes SeNB；The Two transmission units 1050 send (313) the 2nd RRC connection reconfigurations to MeNB for setting message in response to the 2nd RRC connection reconfiguration It sets and completes message, to indicate that UE has known the configuration information of SeNB.

Figure 11 shows according to another embodiment of the present invention close for carrying out in MeNB in dual link communication environment The schematic diagram for the device 1100 that key updates.Wherein there is dual links between UE and master base station MeNB and a prothetic group station SeNB.

Device 1100 includes：First receiving unit 1110, for receiving (403,503) first wireless heterogeneous networks from MeNB (RRC) connection reconfiguration sets message, and the first RRC connection reconfiguration sets message for notifying UE to execute key updating；Key updating units 1120, for obtaining (404,504) updated key according to root key；First transmission unit 1130, in response to first RRC connection reconfiguration sets message, sends (406,506) the first RRC connection reconfiguration to MeNB and sets and complete message, wherein the first RRC connects It connects to reconfigure and completes the key updating that is used to indicate in MeNB of message and succeeded；Second receiving unit 1140 is used for from MeNB It receives (411,511) the 2nd RRC connection reconfiguration and sets message, it includes the nothing that SeNB is reconfigured that the 2nd RRC connection reconfiguration, which sets message, The information of line resource；Second transmission unit 1150, for setting message in response to the 2nd RRC connection reconfiguration, to MeNB send (412, 512) the 2nd RRC connection reconfiguration, which is set, completes message, to indicate the information of radio resource that UE has known that SeNB is reconfigured.

In one implementation, device 1100 further includes pause unit 1160, for setting receiving the first RRC connection reconfiguration When message, the data of pause (404) and SeNB are transmitted.

In another implementation, device 1100 further includes continuing unit 1170, for receiving the first RRC connection reconfiguration When setting message, the data for continuing (504) and SeNB are transmitted, and in this realization, device 1100 further includes：Third sends single Member 1180, for sending (514) Packet Data Convergence Protocol to MeNB after completing with the random access procedure of SeNB (PDCP) state report, to determine the data for being sent to UE during key updating process.

In one implementation, device 1100 further includes reconstruction unit 1190, for complete with the random access procedure of SeNB At later, SeNB branch is carried as separation and carries out the reconstruction of wireless spread-spectrum technology (RLC) layer and media access control (MAC) layer It resets.

Figure 12 shows according to another embodiment of the present invention for carrying out key in UE in dual link communication environment The schematic diagram of the device 1200 of update.Wherein there is dual links between UE and master base station MeNB and a prothetic group station SeNB.

Device 1200 includes：Receiving unit 1210, for receiving (606) wireless heterogeneous networks (RRC) connection weight from MeNB Message is configured, RRC connection reconfiguration sets message for notifying UE to execute key updating and reconfiguring associated with SeNB auxiliary small District's groups (SCG), wherein SCG refers to the group of server carrier associated with SeNB；Key updating units 1220, for close according to root Key obtains (607) updated key；Transmission unit 1230 is sent for setting message in response to RRC connection reconfiguration to MeNB (610) RRC connection reconfiguration, which is set, completes message, and RRC connection reconfiguration, which is set, to be completed message and be used to indicate key updating in MeNB Success.

Here, methods and apparatus disclosed herein is described referring to attached drawing.It should be appreciated, however, that shown in attached drawing And sequence of steps described in this description it is only schematical, without departing from the scope of the claims, These method and steps and/or movement can be executed in a different order and be not limited in shown in the drawings and specification Described specific order.

In one or more exemplary designs, this can be realized with hardware, software, firmware or their any combination The application function.If realized with software, can be stored the function as one or more instruction or code On a computer-readable medium, or as on computer-readable medium one or more instructions or code transmit.It calculates Machine readable medium includes computer storage media and communication media, and wherein communication media includes facilitating computer program from one Place is transmitted to the arbitrary medium of another place.Storage medium can be general or specialized computer-accessible any available Medium.This computer-readable medium may include, such as, but not limited to, RAM, ROM, EEPROM, CD-ROM or other CDs Store equipment, disk storage equipment or other magnetic storage apparatus, either can be used for general or specialized computer or it is general or The form of the addressable instruction of application specific processor or data structure come code modules desired by carrying or store it is any its Its medium.Also, it is any to connect the computer-readable medium that be known as.For example, if software be using coaxial cable, The wireless technology of optical fiber cable, twisted pair, Digital Subscriber Line (DSL) or such as infrared ray, radio and microwave etc is come from net It stands, server or other remote sources transmission, then coaxial cable, optical fiber cable, twisted pair, DSL or such as infrared ray, wireless The wireless technology of electricity and microwave etc is also included in the definition of medium.

General processor, digital signal processor (DSP), specific integrated circuit (ASIC), field programmable gate can be used Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or for executing sheet Any combination of function described in text come realize or execute combine the disclosure described in various illustrative logical blocks, module and Circuit.General processor can be microprocessor, alternatively, processor is also possible to any conventional processor, controller, micro-control Device or state machine processed.Processor also can be implemented as calculating the combination of equipment, for example, the combination of DSP and microprocessor, multiple The combination or any other such structure of microprocessor, one or more microprocessors and DSP core.

Those of ordinary skill in the art should also understand that, the various illustrative logics described in conjunction with embodiments herein The combination of electronic hardware, computer software or both may be implemented into block, module, circuit and algorithm steps.In order to understand earth's surface Show this interchangeability between hardware and software, various illustrative components, block, module, circuit and step are enclosed above General description has been carried out around its function.Hardware is implemented as this function and is also implemented as software, is depended on specific Using and apply design constraint over the whole system.Those skilled in the art can be directed to every kind of specific application, to become Logical mode realizes described function, and still, this realization decision should not be interpreted as causing a departure from the scope of this disclosure.

The above description of the disclosure is for can be realized any those of ordinary skill of this field or using the present invention.It is right For those of ordinary skill in the art, the various modifications of the disclosure be will be apparent from, and generality defined herein Principle can also be applied to other deformations in the case where without deviating from the spirit and scope of the disclosed invention.Therefore, the present invention is simultaneously It is not limited to example and design as described herein, but it is consistent with the widest scope of principle disclosed herein and novel features.

Claims

1. it is a kind of in dual link communication environment in master base station carry out key updating method, wherein user equipment (UE) with There is dual link between the master base station and a prothetic group station, the method includes：

When the master base station will carry out key updating, (303) first radio resource control RRC connection reconfigurations are sent to the UE Message is set to notify the UE to execute key updating and discharge secondary cell group SCG associated with the prothetic group station, wherein SCG Refer to the group of server carrier associated with the prothetic group station；

(307) prothetic group station release request message is sent to the prothetic group station to discharge the communication between the prothetic group station and the UE Connection；

It receives (308) and discharges response message from the prothetic group station at the prothetic group station, the prothetic group station release response message is for referring to Show that the prothetic group station has released the communication connection with the UE；

After setting completion message to the first RRC connection reconfiguration from the UE in reception (306), sent to the prothetic group station (310) request message is added for the prothetic group station of the UE, to request the prothetic group station to establish the dual link with the UE, wherein The first RRC connection reconfiguration sets the key updating that completion message is used to indicate in the master base station and has succeeded；

(311), which are received, from the prothetic group station adds response message in response to the prothetic group station of prothetic group station addition request message to refer to Show that the prothetic group station receives the prothetic group station addition request message, wherein prothetic group station addition response message includes the prothetic group The configuration information stood；

(312) the 2nd RRC connection reconfigurations are sent to the UE and set message, and it includes described that the 2nd RRC connection reconfiguration, which sets message, The configuration information at prothetic group station；

Message is set in response to the 2nd RRC connection reconfiguration, (313) is received and has been set from the 2nd RRC connection reconfiguration of the UE At message, the 2nd RRC connection reconfiguration sets completion message and is used to indicate the configuration information that the UE has known the prothetic group station.

2. the method as described in claim 1 further includes：The UE actively discharges and the prothetic group station when executing key updating Associated secondary cell group.

3. the method as described in claim 1 further includes：The master base station independently initiates key updating or the master base station Key updating is triggered according to the updated key that core net provides.

4. it is a kind of in dual link communication environment in master base station carry out key updating method, wherein user equipment (UE) with There is dual link between the master base station and a prothetic group station, the method includes：

In key updating to be carried out, (403,503) first radio resource control RRC connection reconfiguration message is sent to the UE To notify the UE to execute key updating；

Receive (406,506) from the UE, the first RRC connection of setting in response to the first RRC connection reconfiguration message weighs Message is completed in configuration, wherein the first RRC connection reconfiguration, which is set, completes the key updating that message is used to indicate in the master base station Succeed；

The instruction of (407,507) security key update is sent to the prothetic group station key will occur more to prothetic group station instruction Newly；

After receiving the first RRC connection reconfiguration and setting completion message, sent by GTP tunnel to the prothetic group station (408,508) specific cluster data cell PDU, with the PDU after indicating the specific PDU to the prothetic group station using updating after Key encrypted；

The information that (409,509) described prothetic group station is the radio resource that the UE is reconfigured is received from the prothetic group station；

(411,511) the 2nd RRC connection reconfiguration is sent to the UE and sets message, and the 2nd RRC connection reconfiguration sets message and includes The prothetic group station is the information for the radio resource that the UE is reconfigured；

Message is set in response to the 2nd RRC connection reconfiguration, receives the 2nd RRC connection reconfiguration of (412,512) from the UE It sets and completes message, the 2nd RRC connection reconfiguration sets completion message and is used to indicate the configuration that the UE has known the prothetic group station Information.

5. method as claimed in claim 4, wherein the UE is when receiving the first RRC connection reconfiguration and setting message, temporarily The data for stopping (404) and the prothetic group station are transmitted.

6. method as claimed in claim 4, wherein the UE is when receiving the first RRC connection reconfiguration and setting message, after The data at continuous (504) and the prothetic group station are transmitted, and the method also includes：

After the random access procedure at the UE Yu the prothetic group station is completed, the packet data of (514) from the UE is received Convergence protocol PDCP state report, to determine the data for being sent to the UE during key updating process.

7. it is a kind of in dual link communication environment in master base station carry out key updating method, wherein user equipment (UE) with There is dual link between the master base station and a prothetic group station, the method includes：

In key updating to be carried out, the instruction of (603) security key update is sent to refer to the prothetic group station to the prothetic group station Key updating will be occurred by showing；

(604) specific cluster data cell PDU is sent to the prothetic group station by GTP tunnel, to indicate institute to the prothetic group station The PDU after specific PDU is stated to be encrypted using updated key；

Receiving (605) described prothetic group station from the prothetic group station is the radio resource that the UE is reconfigured；

(606) RRC connection reconfiguration is sent to the UE and sets message, to notify the UE to execute key updating and reconfigure and institute The associated secondary cell group SCG in prothetic group station is stated, wherein SCG refers to the group of server carrier associated with the prothetic group station；

Message is set in response to the RRC connection reconfiguration, reception (610) is set from the RRC connection reconfiguration of the UE completes message, institute It states RRC connection reconfiguration and sets and complete the key updating that is used to indicate in the master base station of message and succeeded.

8. it is a kind of in dual link communication environment in user equipment (UE) carry out key updating method, wherein the UE with There is dual link between one master base station and a prothetic group station, the method includes：

(303) first radio resource control RRC connection reconfiguration message are received from the master base station, wherein first RRC connects Reconfiguration message is connect for notifying the UE to execute key updating and discharging secondary cell group associated with the prothetic group station SCG, SCG refer to the group of server carrier associated with the prothetic group station；

(304) updated key is obtained according to root key；

It is set to (306) the first RRC connection reconfigurations of master base station transmission and completes message, to indicate the key in the master base station more Newly complete；

(312) the 2nd RRC connection reconfigurations are received from the master base station and set message, and the 2nd RRC connection reconfiguration sets message and includes The configuration information at the prothetic group station；

Message is set in response to the 2nd RRC connection reconfiguration, (313) the 2nd RRC connection reconfigurations is sent to the master base station and has set At message, to indicate that the UE has known the configuration information at the prothetic group station.

9. it is a kind of in dual link communication environment in user equipment (UE) carry out key updating method, wherein the UE with There is dual link between one master base station and a prothetic group station, the method includes：

(403,503) first radio resource control RRC connection reconfiguration message is received from the master base station, the first RRC connects Reconfiguration message is connect for notifying the UE to execute key updating；

(404,504) updated key is obtained according to root key；

Message is set in response to the first RRC connection reconfiguration, sends (406,506) the first RRC connection reconfiguration to the master base station It sets and completes message, wherein the first RRC connection reconfiguration sets and completes message and be used to indicate key updating in the master base station Through success；

(411,511) the 2nd RRC connection reconfiguration is received from the master base station and sets message, and the 2nd RRC connection reconfiguration sets message Information comprising the radio resource that the prothetic group station reconfigures；

Message is set in response to the 2nd RRC connection reconfiguration, sends (412,512) the 2nd RRC connection reconfiguration to the master base station It sets and completes message, to indicate the information of radio resource that the UE has known that the prothetic group station is reconfigured.

10. method as claimed in claim 9, further includes：

When receiving the first RRC connection reconfiguration and setting message, the data at pause (404) and the prothetic group station are transmitted.

11. method as claimed in claim 9, further includes：

When receiving the first RRC connection reconfiguration and setting message, the data for continuing (504) and the prothetic group station are transmitted, and The method also includes：

After completing with the random access procedure at the prothetic group station, (514) packet data convergence association is sent to the master base station PDCP state report is discussed, to determine the data for being sent to the UE during key updating process.

12. method as claimed in claim 9, further includes：

After being completed with the random access procedure at the prothetic group station, the auxiliary base station leg is carried as separation and is carried out wirelessly Link control rlc layer is rebuild and media access control MAC layer is reseted.

13. a kind of method for carrying out key updating in user equipment (UE) in dual link communication environment, wherein the UE There is dual link between a master base station and a prothetic group station, the method includes：

(606) radio resource control RRC connection reconfiguration message is received from the master base station, the RRC connection reconfiguration sets message For notifying the UE to execute key updating and reconfiguring secondary cell group SCG associated with the prothetic group station, wherein SCG is Refer to the group of server carrier associated with the prothetic group station；

(607) updated key is obtained according to root key；

Message is set in response to the RRC connection reconfiguration, is set to master base station transmission (610) RRC connection reconfiguration and completes message, institute It states RRC connection reconfiguration and sets and complete the key updating that is used to indicate in the master base station of message and succeeded.

14. a kind of for carrying out the device of key updating, wherein user equipment (UE) in master base station in dual link communication environment There is dual link between the master base station and a prothetic group station, described device includes：

First transmission unit, for sending (303) first to the UE and wirelessly providing when the master base station will carry out key updating Source control RRC connection reconfiguration sets message to notify the UE to execute key updating and discharge associated auxiliary with the prothetic group station Cell group SCG, wherein SCG refers to the group of server carrier associated with the prothetic group station；

Second transmission unit, for sending (307) prothetic group station release request message to the prothetic group station to discharge the prothetic group station With the communication connection between the UE；

First receiving unit discharges response message from the prothetic group station at the prothetic group station for receiving (308), and the prothetic group station is released It puts response message and is used to indicate the prothetic group station and released communication connection with the UE；

Third transmission unit, after setting completion message to the first RRC connection reconfiguration from the UE in reception (306), (310) are sent to the prothetic group station and add request message for the prothetic group station of the UE, to request the prothetic group station to be established and institute The dual link of UE is stated, wherein the first RRC connection reconfiguration, which is set, completes the key updating that message is used to indicate in the master base station Succeed；

Second receiving unit, for receiving (311) in response to the prothetic group of prothetic group station addition request message from the prothetic group station Addition response message stand to indicate that the prothetic group station receives the prothetic group station addition request message, wherein prothetic group station addition is rung Answering message includes the configuration information at the prothetic group station；

4th transmission unit sets message, the 2nd RRC connection weight for sending (312) the 2nd RRC connection reconfigurations to the UE Configure the configuration information that message includes the prothetic group station；

Third receiving unit receives the of (313) from the UE for setting message in response to the 2nd RRC connection reconfiguration Two RRC connection reconfigurations, which are set, completes message, the 2nd RRC connection reconfiguration set complete message be used to indicate the UE known it is described The configuration information at prothetic group station.

15. a kind of for carrying out the device of key updating, wherein user equipment (UE) in master base station in dual link communication environment There is dual link between the master base station and a prothetic group station, described device includes：

First transmission unit, for sending (403,503) first wireless heterogeneous networks to the UE in key updating to be carried out RRC connection reconfiguration sets message to notify the UE to execute key updating；

First receiving unit, for receive (406,506) from the UE, set and disappear in response to the first RRC connection reconfiguration First RRC connection reconfiguration of breath, which is set, completes message, wherein the first RRC connection reconfiguration, which sets completion message, is used to indicate the master Key updating in base station has succeeded；

Second transmission unit, for sending the instruction of (407,507) security key update to the prothetic group station with to the prothetic group station Key updating will occur for instruction；

Third transmission unit, for receive the first RRC connection reconfiguration set complete message after, by GTP tunnel to The prothetic group station sends (408,508) specific cluster data cell PDU, after indicating the specific PDU to the prothetic group station PDU encrypted using updated key；

Second receiving unit is the nothing that the UE is reconfigured for receiving (409,509) described prothetic group station from the prothetic group station The information of line resource；

4th transmission unit sets message for sending (411,511) the 2nd RRC connection reconfiguration to the UE, and the 2nd RRC connects Connecing reconfiguration message includes the information that the prothetic group station is the radio resource that the UE is reconfigured；

Third receiving unit receives (412,512) and comes from the UE for setting message in response to the 2nd RRC connection reconfiguration The 2nd RRC connection reconfiguration set and complete message, the 2nd RRC connection reconfiguration, which is set, to be completed message and is used to indicate the UE to have known The configuration information at the prothetic group station.

16. a kind of for carrying out the device of key updating, wherein user equipment (UE) in master base station in dual link communication environment There is dual link between the master base station and a prothetic group station, described device includes：

First transmission unit, for sending the instruction of (603) security key update to the prothetic group station in key updating to be carried out Key updating will occur to prothetic group station instruction；

Second transmission unit, for the prothetic group station sending (604) specific cluster data cell PDU by GTP tunnel, with to The prothetic group station indicates that the PDU after the specific PDU is encrypted using updated key；

First receiving unit is the wireless money that the UE is reconfigured for receiving (605) described prothetic group station from the prothetic group station Source；

Third transmission unit sets message for sending (606) RRC connection reconfiguration to the UE, to notify the UE to execute key Secondary cell group SCG associated with the prothetic group station is updated and reconfigures, wherein SCG refers to associated with the prothetic group station The group of server carrier；

Second receiving unit receives the RRC connection of (610) from the UE for setting message in response to the RRC connection reconfiguration Reconfigure and complete message, the RRC connection reconfiguration set complete message be used to indicate key updating in the master base station at Function.

17. it is a kind of for carrying out the device of key updating in user equipment (UE) in dual link communication environment, wherein the UE There is dual link between a master base station and a prothetic group station, described device includes：

First receiving unit, for receiving (303) first radio resource control RRC connection reconfiguration message from the master base station, Wherein the first RRC connection reconfiguration sets message for notifying the UE to execute key updating and discharging and prothetic group station phase Associated secondary cell group SCG, SCG refer to the group of server carrier associated with the prothetic group station；

Key updating units, for obtaining (304) updated key according to root key；

First transmission unit completes message for setting to (306) the first RRC connection reconfigurations of master base station transmission, to indicate The key updating stated in master base station has been completed；

Second receiving unit sets message for receiving (312) the 2nd RRC connection reconfigurations from the master base station, and the 2nd RRC connects Connect the configuration information that reconfiguration message includes the prothetic group station；

Second transmission unit sends (313) the to the master base station for setting message in response to the 2nd RRC connection reconfiguration Two RRC connection reconfigurations, which are set, completes message, to indicate that the UE has known the configuration information at the prothetic group station.

18. it is a kind of for carrying out the device of key updating in user equipment (UE) in dual link communication environment, wherein the UE There is dual link between a master base station and a prothetic group station, described device includes：

First receiving unit disappears for receiving (403,503) first radio resource control RRC connection reconfiguration from the master base station Breath, the first RRC connection reconfiguration set message for notifying the UE to execute key updating；

Key updating units, for obtaining (404,504) updated key according to root key；

First transmission unit, for setting message in response to the first RRC connection reconfiguration, to the master base station send (406, 506) the first RRC connection reconfiguration, which is set, completes message, wherein the first RRC connection reconfiguration, which sets completion message, is used to indicate the master Key updating in base station has succeeded；

Second receiving unit sets message for receiving (411,511) the 2nd RRC connection reconfiguration from the master base station, and described second RRC connection reconfiguration sets the information that message includes the radio resource that the prothetic group station reconfigures；

Second transmission unit, for setting message in response to the 2nd RRC connection reconfiguration, to the master base station send (412, 512) the 2nd RRC connection reconfiguration, which is set, completes message, to indicate wireless money that the UE has known that the prothetic group station is reconfigured The information in source.

19. it is a kind of for carrying out the device of key updating in user equipment (UE) in dual link communication environment, wherein the UE There is dual link between a master base station and a prothetic group station, described device includes：

Receiving unit, for receiving (606) radio resource control RRC connection reconfiguration message from the master base station, the RRC connects Reconfiguration message is connect for notifying the UE to execute key updating and reconfiguring secondary cell group associated with the prothetic group station SCG, wherein SCG refers to the group of server carrier associated with the prothetic group station；

Key updating units, for obtaining (607) updated key according to root key；

Transmission unit sends (610) RRC connection reconfiguration to the master base station for setting message in response to the RRC connection reconfiguration It sets and completes message, the RRC connection reconfiguration sets the key updating that completion message is used to indicate in the master base station and succeeded.