CN104936175A

CN104936175A - Method for updating key in dual connection communication environment and device thereof

Info

Publication number: CN104936175A
Application number: CN201410109897.1A
Authority: CN
Inventors: 邓云; 钱德瑞卡·沃拉尔
Original assignee: Alcatel Lucent 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: 2015-09-23
Anticipated expiration: 2034-03-21
Also published as: CN104936175B

Abstract

The invention provides a method for updating a key in a dual connection communication environment and a device thereof. According to the method realized in an MeNB, UE and the MeNB are in dual connection with an SeNB, the method comprises the steps of sending a first RRC connection reconfiguration message to the UE to notify the UE to execute key updating and release the SCG associated with the SeNB when the key updating is carried out, receiving an SeNB response message from the SeNB, sending an SeNB adding request message for the UE to the SeNB after a first RRC reconfiguration completion message from the UE is received so as to ask the SeNB to establish the double connection with the UE, responding to the SeNB adding request message and receiving an SeNB adding response message from the SeNB to indicate the SeNB to receive the SeNB adding request message, sending a second RRC connection reconfiguration message to the UE, and responding to the second RRC connection reconfiguration message and receiving the second RRC connection reconfiguration completion message from the UE.

Description

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

Technical field

The present invention generally relates to wireless communication field, more specifically, relates to the method and apparatus for carrying out key updating under the communication environment of dual link.

Background technology

In the cordless communication network of isomery, usually have the larger macro base station of coverage and coverage is less comparatively speaking micro-base station.Fig. 1 shows the schematic diagram of cordless communication network 100 of the prior art.As shown in Figure 1, in cordless communication network 100, comprise a macro base station 110, it provides the basic network coverage 120, and one or more micro-base station 132,134,136 and 138 with smaller power, it provides the relatively little network coverage 142,144,146 and 148 (marking with backslash in figure) respectively, and macro base station 110 is connected by back haul link with one or more micro-base station.The subscriber equipment (UE) 150 be in the common coverage of macro base station and micro-base station can establish a communications link to macro base station 110 and corresponding micro-base station (as micro-base station 134) simultaneously, and this situation is called as " dual link ".

More general, dual link refers to the operation of the Radio Resource that the nexus (such as two base stations) that given UE uses at least two of connecting with imperfect back haul link different under wireless heterogeneous networks (RRC) connection provides.These two base stations can be called dominant base (Master eNB is called for short MeNB) and prothetic group station (Secondary eNB is called for short SeNB).Wireless access network (RAN) has agreed to that the control plane framework of dual link is C1, namely, after RRM (RRM) orthofunction between MeNB and SeNB, only have MeNB to produce the final RRC information that will send to UE, UE also only sends RRC information to MeNB; User plane framework is 1A and 3C, wherein 3C framework refers to and ends in MeNB by S1-U interface (namely MeNB is from core net downlink data receiving, and send upstream data to core net), in MeNB, there is carrying to be separated, independently wireless spread-spectrum technology (RLC) entity is used for the carrying (SplitBearer) be separated.Fig. 2 shows the schematic diagram of layer 2 (L2) structure when adopting 3C user plane framework in MeNB and SeNB, can find out, for the carrying be separated, downlink data is after PDCP infill layer, and partial data (i.e. PDCP PDU) is sent to the RLC entity (SeNB branch road) being positioned at SeNB by MeNB according to certain criterion; Another part data send to the RLC entity (MeNB branch road) being positioned at MeNB.Obtained partial data is sent to UE by MeNB and SeNB respectively, and UE obtains complete data after the process such as sequence.

Summary of the invention

As shown in Figure 2, when adopting 3C user plane framework under dual link environment, owing to only there is packet data convergence (PDCP) layer in MeNB, a safe key is therefore only needed to be encrypted PDCP Packet Data Unit (PDU).But, owing to there are two base stations (MeNB and SeNB), therefore key updating process will relate to two base stations, needs to solve the interaction problems between UE and two base station, and current specification is only for the situation that key updating occurs in a base station.Consider that the imperfect back haul link between MeNB and SeNB may cause long delay (unidirectional 2ms to 60ms), once MeNB needs to perform key updating, how treatment S eNB branch road, when send PDCP PDU with new safe key to SeNB and how to determine to use first PDCP PDU of new safe key will be the problem needing to solve, what therefore key updating process will be more complicated than the scheme of current single base station be many.

In order to address these problems, the invention provides under dual link communication environment, when UE uses 3C user plane framework, carry out the scheme of key updating.

According to a first aspect of the invention, provide a kind of method for carrying out key updating in dual link communication environment in dominant base, wherein subscriber equipment (UE) and there is dual link between described dominant base and a prothetic group station, described method comprises: when carrying out key updating, send the first wireless heterogeneous networks (RRC) to described UE and connect reconfiguration message to notify described UE execution key updating and to discharge the auxiliary cell set (SCG) be associated with described prothetic group station, wherein SCG refers to the group of the server carrier be associated with described prothetic group station; Prothetic group station releasing request message is sent to discharge the communication connection between described prothetic group station and described UE to described prothetic group station; Receive the prothetic group station release response message from described prothetic group station, described prothetic group station release response message is used to indicate described prothetic group station and has released the communication connection with described UE; Receive from described UE the one RRC connect reshuffled message after, to described prothetic group station, request message is added at the prothetic group station sent for described UE, to ask described prothetic group station to be set up and the dual link of described UE, a wherein said RRC connects and has reshuffled message and be used to indicate key updating success in described dominant base; Add request message in response to described prothetic group station, receive interpolation response message in prothetic group station from described prothetic group station and add request message to indicate described prothetic group station to accept described prothetic group station, the configuration information that response message comprises described prothetic group station is added at wherein said prothetic group station; Send the 2nd RRC to described UE and connect reconfiguration message, described 2nd RRC connects the configuration information that reconfiguration message comprises described prothetic group station; Connect reconfiguration message in response to described 2nd RRC, message has been reshuffled in the 2nd RRC connection received from described UE, and described 2nd RRC connection has been reshuffled message and has been used to indicate the configuration information that described UE has known described prothetic group station.

According to a second aspect of the invention, provide a kind of method for carrying out key updating in dual link communication environment in dominant base, wherein subscriber equipment (UE) and there is dual link between described dominant base and a prothetic group station, described method comprises: when carrying out key updating, sends the first wireless heterogeneous networks (RRC) connect reconfiguration message to notify that described UE performs key updating to described UE; Connect reconfiguration message in response to a described RRC, the RRC received from described UE connects and has reshuffled message, and a wherein said RRC connects and reshuffled message and be used to indicate key updating in described dominant base success; Security key update instruction is sent key updating will be there is to the instruction of described prothetic group station to described prothetic group station; After receiving a described RRC connection and having reshuffled message, send specific cluster data cell (PDU) by GTP tunnel to described prothetic group station, use the key after upgrading to be encrypted with the PDU after the described specific PDU of described prothetic group station instruction; The information that described prothetic group station is the Radio Resource that described UE reconfigures is received from described prothetic group station; Send the 2nd RRC to described UE and connect reconfiguration message, described 2nd RRC connects reconfiguration message and comprises the information that described prothetic group station is the Radio Resource that described UE reconfigures; Connect reconfiguration message in response to described 2nd RRC, message has been reshuffled in the 2nd RRC connection received from described UE, and described 2nd RRC connection has been reshuffled message and has been used to indicate the configuration information that described UE has known described prothetic group station.

According to a third aspect of the present invention, provide a kind of method for carrying out key updating in dual link communication environment in dominant base, wherein subscriber equipment (UE) and there is dual link between described dominant base and a prothetic group station, described method comprises: when carrying out key updating, sends security key update instruction will there is key updating to the instruction of described prothetic group station to described prothetic group station; Send specific cluster data cell (PDU) by user plane to described prothetic group station, use the key after upgrading to be encrypted with the PDU after the described specific PDU of described prothetic group station instruction; The information that described prothetic group station is the Radio Resource that described UE reconfigures is received from described prothetic group station; Send RRC to described UE and connect reconfiguration message, to notify that described UE performs key updating and reshuffles the auxiliary cell set (SCG) be associated with described prothetic group station, wherein SCG refers to the group of the server carrier be associated with described prothetic group station; Connect reconfiguration message in response to described RRC, the RRC received from described UE connects and has reshuffled message, and described RRC connects and reshuffled message and be used to indicate key updating success in described dominant base.

According to a fourth aspect of the present invention, provide a kind of for carrying out the method for key updating in dual link communication environment in subscriber equipment (UE), dual link is there is between a wherein said UE and dominant base and a prothetic group station, described method comprises: receive the first wireless heterogeneous networks (RRC) from described dominant base and connect reconfiguration message, a wherein said RRC connects reconfiguration message and performs key updating for notifying described UE and discharge the auxiliary cell set (SCG) be associated with described prothetic group station, SCG refers to the group of the server carrier be associated with described prothetic group station, the key after upgrading is obtained according to root key, send a RRC connection to described dominant base and reshuffled message, complete to indicate the key updating in described dominant base, receive the 2nd RRC from described dominant base and connect reconfiguration message, described 2nd RRC connects the configuration information that reconfiguration message comprises described prothetic group station, connect reconfiguration message in response to described 2nd RRC, send the 2nd RRC connection to described dominant base and reshuffled message, with the configuration information indicating described UE to know described prothetic group station.

According to a fifth aspect of the present invention, provide a kind of for carrying out the method for key updating in dual link communication environment in subscriber equipment (UE), dual link is there is between a wherein said UE and dominant base and a prothetic group station, described method comprises: receive the first wireless heterogeneous networks (RRC) from described dominant base and connect reconfiguration message, and a described RRC connects reconfiguration message and is used for notifying that described UE performs key updating; The key after upgrading is obtained according to root key; Connect reconfiguration message in response to a described RRC, send a RRC connect and reshuffled message to described dominant base, a wherein said RRC connects and has reshuffled message and be used to indicate key updating success in described dominant base; Receive the 2nd RRC from described dominant base and connect reconfiguration message, described 2nd RRC connects the information that reconfiguration message comprises the Radio Resource that described prothetic group station reconfigures; Connect reconfiguration message in response to described 2nd RRC, send the 2nd RRC connection to described dominant base and reshuffled message, with the information indicating described UE to know the Radio Resource that described prothetic group station reconfigures.

According to a sixth aspect of the invention, provide a kind of for carrying out the method for key updating in dual link communication environment in subscriber equipment (UE), dual link is there is between a wherein said UE and dominant base and a prothetic group station, described method comprises: receive wireless heterogeneous networks (RRC) from described dominant base and connect reconfiguration message, described RRC connects reconfiguration message for notifying that described UE performs key updating and reshuffles the auxiliary cell set (SCG) be associated with described prothetic group station, wherein SCG refers to the group of the server carrier be associated with described prothetic group station, the key after upgrading is obtained according to root key, connect reconfiguration message in response to described RRC, send RRC connect and reshuffled message to described dominant base, described RRC connects and has reshuffled message and be used to indicate key updating success in described dominant base.

According to a seventh aspect of the present invention, provide a kind of device for carrying out key updating in dual link communication environment in dominant base, wherein subscriber equipment (UE) and there is dual link between described dominant base and a prothetic group station, described device comprises: the first transmitting element, for when key updating will be carried out, send the first wireless heterogeneous networks (RRC) to described UE and connect reconfiguration message to notify described UE execution key updating and to discharge the auxiliary cell set (SCG) be associated with described prothetic group station, wherein SCG refers to the group of the server carrier be associated with described prothetic group station, second transmitting element, for sending prothetic group station releasing request message to discharge the communication connection between described prothetic group station and described UE to described prothetic group station, first receiving element, for receiving the prothetic group station release response message from described prothetic group station, described prothetic group station release response message is used to indicate described prothetic group station and has released the communication connection with described UE, 3rd transmitting element, for receive from described UE the one RRC connect reshuffled message after, to described prothetic group station, request message is added at the prothetic group station sent for described UE, to ask described prothetic group station to add the dual link with described UE, a wherein said RRC connects and has reshuffled message and be used to indicate key updating in described dominant base success, second receiving element, for adding request message in response to described prothetic group station, receive interpolation response message in prothetic group station from described prothetic group station and add request message to indicate described prothetic group station to accept described prothetic group station, the configuration information that response message comprises described prothetic group station is added at wherein said prothetic group station, 4th transmitting element, connect reconfiguration message for sending the 2nd RRC to described UE, described 2nd RRC connects the configuration information that reconfiguration message comprises described prothetic group station, 3rd receiving element, for connecting reconfiguration message in response to described 2nd RRC, message has been reshuffled in the 2nd RRC connection received from described UE, and described 2nd RRC connection has been reshuffled message and has been used to indicate the configuration information that described UE has known described prothetic group station.

According to an eighth aspect of the present invention, provide a kind of device for carrying out key updating in dual link communication environment in dominant base, wherein subscriber equipment (UE) and there is dual link between described dominant base and a prothetic group station, described device comprises: the first transmitting element, for when key updating will be carried out, send the first wireless heterogeneous networks (RRC) to described UE and connect reconfiguration message to notify that described UE performs key updating; First receiving element, for connecting reconfiguration message in response to a described RRC, the RRC received from described UE connects and has reshuffled message, and a wherein said RRC connects and reshuffled message and be used to indicate key updating in described dominant base success; Second transmitting element, for sending security key update instruction will there is key updating to the instruction of described prothetic group station to described prothetic group station; 3rd transmitting element, for after receiving a described RRC connection and having reshuffled message, send specific cluster data cell (PDU) by user plane to described prothetic group station, use the key after upgrading to be encrypted with the PDU after the described specific PDU of described prothetic group station instruction; Second receiving element, for receiving from described prothetic group station the information that described prothetic group station is the Radio Resource that described UE reconfigures; 4th transmitting element, connect reconfiguration message for sending the 2nd RRC to described UE, described 2nd RRC connects reconfiguration message and comprises the information that described prothetic group station is the Radio Resource that described UE reconfigures; 3rd receiving element, for connecting reconfiguration message in response to described 2nd RRC, message has been reshuffled in the 2nd RRC connection received from described UE, and described 2nd RRC connection has been reshuffled message and has been used to indicate the configuration information that described UE has known described prothetic group station.

According to a ninth aspect of the present invention, provide a kind of device for carrying out key updating in dual link communication environment in dominant base, wherein subscriber equipment (UE) and there is dual link between described dominant base and a prothetic group station, described device comprises: the first transmitting element, for when key updating will be carried out, send security key update instruction to described prothetic group station key updating will be there is to the instruction of described prothetic group station; Second transmitting element, for sending specific cluster data cell (PDU) by user plane to described prothetic group station, uses the key after upgrading to be encrypted with the PDU after the described specific PDU of described prothetic group station instruction; First receiving element, for receiving from described prothetic group station the information that described prothetic group station is the Radio Resource that described UE reconfigures; 3rd transmitting element, reconfiguration message is connected for sending RRC to described UE, to notify that described UE performs key updating and reshuffles the auxiliary cell set (SCG) be associated with described prothetic group station, wherein SCG refers to the group of the server carrier be associated with described prothetic group station; Second receiving element, for connecting reconfiguration message in response to described RRC, the RRC received from described UE connects and has reshuffled message, and described RRC connects and reshuffled message and be used to indicate key updating success in described dominant base.

According to a tenth aspect of the present invention, provide a kind of for carrying out the device of key updating in dual link communication environment in subscriber equipment (UE), dual link is there is between a wherein said UE and dominant base and a prothetic group station, described device comprises: the first receiving element, reconfiguration message is connected for receiving the first wireless heterogeneous networks (RRC) from described dominant base, a wherein said RRC connects reconfiguration message and performs key updating for notifying described UE and discharge the auxiliary cell set (SCG) be associated with described prothetic group station, SCG refers to the group of the server carrier be associated with described prothetic group station, key updating units, for obtaining the key after upgrading according to root key, first transmitting element, has reshuffled message for sending a RRC connection to described dominant base, has completed to indicate the key updating in described dominant base, second receiving element, connect reconfiguration message for receiving the 2nd RRC from described dominant base, described 2nd RRC connects the configuration information that reconfiguration message comprises described prothetic group station, second transmitting element, for connecting reconfiguration message in response to described 2nd RRC, sending the 2nd RRC connection to described dominant base and having reshuffled message, with the configuration information indicating described UE to know described prothetic group station.

According to an eleventh aspect of the present invention, provide a kind of for carrying out the device of key updating in dual link communication environment in subscriber equipment (UE), dual link is there is between a wherein said UE and dominant base and a prothetic group station, described device comprises: the first receiving element, connect reconfiguration message for receiving the first wireless heterogeneous networks (RRC) from described dominant base, a described RRC connects reconfiguration message and is used for notifying that described UE performs key updating; Key updating units, for obtaining the key after upgrading according to root key; First transmitting element, for connecting reconfiguration message in response to a described RRC, send a RRC to described dominant base to connect and reshuffled message, a wherein said RRC connects and has reshuffled message and be used to indicate key updating success in described dominant base; Second receiving element, connect reconfiguration message for receiving the 2nd RRC from described dominant base, described 2nd RRC connects the information that reconfiguration message comprises the Radio Resource that described prothetic group station reconfigures; Second transmitting element, for connecting reconfiguration message in response to described 2nd RRC, sending the 2nd RRC connection to described dominant base and having reshuffled message, with the information indicating described UE to know the Radio Resource that described prothetic group station reconfigures.

According to a twelfth aspect of the present invention, provide a kind of for carrying out the device of key updating in dual link communication environment in subscriber equipment (UE), dual link is there is between a wherein said UE and dominant base and a prothetic group station, described device comprises: receiving element, reconfiguration message is connected for receiving wireless heterogeneous networks (RRC) from described dominant base, described RRC connects reconfiguration message for notifying that described UE performs key updating and reshuffles the auxiliary cell set (SCG) be associated with described prothetic group station, wherein SCG refers to the group of the server carrier be associated with described prothetic group station, key updating units, for obtaining the key after upgrading according to root key, transmitting element, for connecting reconfiguration message in response to described RRC, sending RRC to described dominant base and connecting and reshuffled message, and described RRC connects and reshuffled message and be used to indicate key updating success in described dominant base.

Utilize the solution of the present invention, under dual link communication environment, when UE uses 3C user plane framework, effectively can carry out key updating.

Accompanying drawing explanation

After the description below with reference to the specific embodiment of the present invention given by following accompanying drawing, the present invention will be understood better, and other objects of the present invention, details, feature and advantage will become more apparent.In the accompanying drawings:

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

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

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

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

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

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

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

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

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

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

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

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

Wherein, in all of the figs, same or analogous label represents to have identical, similar or corresponding feature or function.

Embodiment

In more detail the preferred embodiment of the present invention is described below with reference to accompanying drawings.Although show the preferred embodiment of the present invention in accompanying drawing, but should be appreciated that, the present invention can be realized in a variety of manners and not should limit by the execution mode of setting forth here.On the contrary, provide these execution modes to be to make the present invention more thorough and complete, and complete for scope of the present invention can be conveyed to those skilled in the art.

The following specifically describes according to each embodiment for carrying out key updating under the communication environment of dual link of the present invention.In the following description, suppose that UE establishes dual link with MeNB and SeNB, and use 3C user plane framework.MeNB is after the instruction or MeNB that receive execution key updating from MME independently determine to carry out key updating, and how treatment S eNB branch road has different schemes.

With reference to figure 1, such as, the UE macro base station 110 that can be the UE150 in Fig. 1, MeNB can be in Fig. 1, and SeNB can be the micro-base station 136 in Fig. 1.But it will be understood by those skilled in the art that the present invention is not limited thereto, UE can set up dual link with any two base stations that it can communicate, and macro base station 110 can be used as SeNB, and uses micro-base station as MeNB.

Fig. 3 shows the flow chart of the method 300 for carrying out key updating under the communication environment of dual link according to a first embodiment of the present invention.Wherein in method 300, MeNB is rebuild by SCG release and SCG and performs key updating.The execution flow process of method 300 is as described below, but is appreciated that some steps wherein can perform not in accordance with shown and described order.

Step 301:UE establishes dual link with MeNB and SeNB, and this UE uses 3C user plane framework (namely MeNB and SeNB also adopts 3C user plane framework).Now, UE is in the dual link communication environment with MeNB and SeNB, uses an encryption key (encryption key of such as being derived by the key K eNB1 before upgrading) to carry out data communication with MeNB and SeNB.The transfer of data of wave point needs to adopt encryption method, concrete, and the method for be encrypted data based on the key K eNB1 before upgrading, deciphering belongs to prior art, and this patent does not launch to describe.

Step 302: the mobile management entity (MME) in Access Network sends UE context modification request to MeNB, wherein comprises the key (being such as called key K eNB2) after renewal and carries out key updating to trigger MeNB.

Here, trigger MeNB for MME to MeNB transmission UE context modification request and carry out key updating to be described, but it will be understood by those skilled in the art that the present invention is not limited to this.Key updating in MeNB also independently can be initiated by MeNB, now generates the key K eNB2 after upgrading by MeNB according to pre-defined rule.

Step 303:MeNB is when receiving the instruction of key updating (the key K eNB2 after namely receiving renewal) from MME, handoff scenario in rapid triggering cell, and notify that UE performs key updating and discharges the SCG be associated with this SeNB by sending a RRC connection reconfiguration message to UE.SCG (Secondary Cell Group, auxiliary cell set) refers to the group of the server carrier be associated with SeNB, and server carrier refers to the carrier wave for described UE serves herein, and this SCG can comprise one or more server carrier.One RRC connects the information that reconfiguration message can also comprise release SCG configuration.But in another kind of implementation, a RRC connects the information that reconfiguration message can not comprise release SCG configuration, but UE is when knowing switching within cell, initiatively discharges the SCG be associated with this SeNB.

Here, MeNB comes to notify key updating to UE by arranging key change designator (being such as set to very by keyChangeIndicator) comprised in a RRC connection reconfiguration message.And connect in reconfiguration message at a RRC, the SCG be associated with SeNB is released.

Step 304: after receiving a RRC and connecting reconfiguration message, UE performs switching within cell, and obtain the key K eNB2 after upgrading according to root key KASME.This root key has all stored in a user device usually, and subscriber equipment can be obtained by predetermined computational methods by Non-Access Stratum signaling and the information of preserving in advance.Further, UE is applied in signaling and transfer of data according to the key K eNB2 derived cipher key after this renewal.

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

Step 306: the RRC received in response to step 303 connects reconfiguration message, UE, after performing key updating, sends a RRC connection to MeNB and has reshuffled message to indicate the key updating success in MeNB.

Here, step 305 and 306 are described as two independent steps.But it will be understood by those skilled in the art that the different implementations according to communication protocol, step 306 can independent with step 305 also can be a sub-steps of step 305.In fact, the random access procedure of UE and the MeNB performed by step 305 and the present invention for key updating process relation little, be not therefore described in detail.

In addition, after MeNB receives UE context modification request in step 302 (or MeNB independently determine to carry out key updating after), SeNB releasing request message (as Suo Shi the step 307 in Fig. 3) can also be sent to discharge the communication connection between SeNB and UE to SeNB.In response to this SeNB releasing request message, SeNB discharges with the communication connection of UE and sends SeNB to MeNB and discharges response message (as Suo Shi the step 308 in Fig. 3).

Be appreciated that step 307-308 can with step 303-306 executed in parallel, or can to perform before step 303, as long as can perform after MeNB knows to carry out key updating.

Step 309: when the MeNB RRC received from UE connect reshuffled message and learn key updating in MeNB success time, MeNB sends UE contextual modifications response message to MME, to report that the key updating in MeNB is successful to MME.

But, it will be understood by those skilled in the art that this step is not necessary.Such as, in the implementation independently initiated by MeNB in key updating, MeNB does not need to upgrade successful to MME report key.

So far, achieve the key updating in MeNB and UE, and the connection of UE and SeNB also discharges.Next, the connection between UE and this SeNB will be re-established.

The SeNB that step 310:MeNB sends for this UE to SeNB adds request message, sets up the dual link with this UE to ask this SeNB.

Step 311:SeNB carries out access control and accepts this request to check whether, if accepted, then sends SeNB to MeNB and adds response message.Wherein, this SeNB adds the configuration information (i.e. the configuration information of SCG) comprising this SeNB in response message.

Step 312:MeNB sends the 2nd RRC to UE and connects reconfiguration message, and it comprises the configuration information of SeNB.

Step 313: connect reconfiguration message in response to the 2nd RRC in step 312, UE sends the 2nd RRC connection to MeNB and has reshuffled message, with the configuration information indicating UE to know SeNB.

Step 314:UE and SeNB performs random access procedure, to re-establish communication connection with SeNB.Stochastic accessing is initiated, access SeNB in the server carrier that UE configures at SeNB.

Step 315:MeNB sends SeNB to SeNB and has added message, configures the dual link of UE to have completed to SeNB instruction.

Step 316: after UE performs the random access procedure with SeNB, it carries out packet data transmission with key K eNB2 and the SeNB after renewal.

Can find out, in method 300, MeNB determines or learns when will carry out key updating, the communication connection between its release UE and SeNB, and after the key updating in UE and MeNB all completes, the communication connection between reconstruction UE and SeNB.

Different from said method 300, following method 400-600 is discharged by SCG and rebuilds, but is reshuffled by SCG, realizes the key updating in UE and MeNB when not disconnecting the connection with SeNB.

In addition, in the description of method 400-600, for simplicity, some contents identical with method 300 are repeated no more.But it will be understood by those skilled in the art that in method 300 some explain and illustrate can be applicable to method 400-600.

Fig. 4 shows the flow chart of the method 400 for carrying out key updating under the communication environment of dual link according to a second embodiment of the present invention.In method 400, first MeNB performs key updating in MeNB, and UE suspends with the transfer of data of SeNB until it receives the Stochastic accessing trigger event for SeNB rebuilds rlc layer and resets MAC layer.

In method 400, MeNB indicates by sending key updating at control plane to SeNB and passes through GPRS Tunnel Protocol (GPRS Tunnelling Protocol, GTP) tunnel sends specific PDU to SeNB, indicates key updating and key updating at which PDU to come into force to SeNB.The execution flow process of method 400 is as described below, but is appreciated that some steps wherein can perform not in accordance with diagram and described order.

Step 401:UE establishes dual link with MeNB and SeNB, and this UE uses 3C user plane framework.Now, UE is in the dual link communication environment with MeNB and SeNB, uses old encryption key (encryption key of such as being derived by the key K eNB1 before upgrading) to carry out data communication with MeNB and SeNB.

Step 402: the MME in Access Network sends UE context modification request to MeNB, wherein comprises the key (being such as called key K eNB2) after renewal and carries out key updating to trigger MeNB.

Here, trigger MeNB for MME to MeNB transmission UE context modification request and carry out key updating to be described, but it will be understood by those skilled in the art that the present invention is not limited to this.Key updating in MeNB initiatively can be initiated by MeNB.

After step 403:MeNB receives the instruction (namely receiving the key K eNB2 after renewal) of key updating from MME, handoff scenario in rapid triggering cell, and notify that UE performs key updating by sending a RRC connection reconfiguration message to UE.Here, MeNB comes to notify key updating to UE by arranging key change designator (being such as set to very by keyChangeIndicator) comprised in a RRC connection reconfiguration message.

Step 404: after receiving a RRC and connecting reconfiguration message, UE performs switching within cell, obtains the key K eNB2 after upgrading according to root key KASME, and UE suspends the transmission with SeNB.

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

Step 406: the RRC received in response to step 403 connects reconfiguration message, UE, after performing key updating, sends a RRC connection to MeNB and has reshuffled message to indicate the key updating success in MeNB.

Here, step 405 and 406 are described as two independent steps.But it will be understood by those skilled in the art that the different implementations according to communication protocol, step 406 can independent with step 405 also can be a sub-steps of step 405.In fact, the random access procedure of UE and the MeNB performed by step 405 and the present invention for key updating process relation little, be not therefore described in detail.

In addition, after MeNB receives UE context modification request in step 402 (or MeNB independently determine to carry out key updating after), security key update instruction can also be sent to SeNB, so that key updating (as Suo Shi the step 407 in Fig. 4) will be there is to SeNB instruction by the X2 interface between MeNB and SeNB.

In addition, UE sends after RRC connects and reshuffled message to MeNB in a step 406, and MeNB sends specific PDU by GTP tunnel to SeNB, with the key K eNB2 moment (as Suo Shi the step 408 in Fig. 4) of coming into force after upgrading to SeNB instruction.

In this article, this specific PDU can be the PDU with ad hoc structure or content, and SeNB can be known, and the PDCP PDU after this specific PDU uses the encryption key after upgrading (being derived by the key K eNB2 after upgrading) to encrypt.That is, the PDCP PDU before this specific PDU uses old encryption key (being derived by KeNB1) to be encrypted, and the PDCP PDU after this specific PDU uses new encryption key (being derived by KeNB2) to be encrypted.It should be noted that, for the separation carrying adopting 3C framework, the PDCP entity in MeNB is PDCPPDU to the RLC entity transmission in SeNB; For the RLC entity in SeNB, reception be RLC service data unit (SDU).

After receiving and indicating (step 407 in Fig. 4) and specific PDU (step 408 in Fig. 4) from the security key update of MeNB, SeNB reconfigures Radio Resource for this UE, and notifies that SeNB is the Radio Resource (step 409 in Fig. 4) that this UE reconfigures to MeNB.Such as, SeNB can distribute special targeting sequencing for this UE.

Next in step 410: when the MeNB RRC received from UE connect reshuffled message and learn key updating in MeNB success time, MeNB sends UE contextual modifications response message to MME, to report that the key updating in MeNB is successful to MME.

So far, achieve the key updating in MeNB and UE, and SeNB has also learnt this renewal and has made response.

Next, send the 2nd RRC in step 411:MeNB to UE and connect reconfiguration message, it comprises the information that SeNB is the Radio Resource that this UE reconfigures.Specifically, the 2nd RRC connection reconfiguration message comprises the targeting sequencing that SeNB distributes for this UE.

Step 412: connect reconfiguration message in response to the 2nd RRC in step 411, UE sends the 2nd RRC connection to MeNB and has reshuffled message, with the information indicating UE to know the Radio Resource that SeNB reconfigures.

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

Step 414: at UE after step 404 knows key updating in MeNB and the RRC received in a step 408 about SCG configuration connects reconfiguration message, it knows that the user plane of SeNB branch road should be re-established.It is rebuild for the Data Radio Bearer (DRB) be separated for SeNB branch road performs rlc layer and resets its MAC layer.All data by old encryption keys in rlc layer in SeNB branch road and MAC layer will be dropped.SeNB can distinguish the data of all data by old encryption keys and new encryption keys after step 408.

Step 413 and step 414 can executed in parallel also can perform with any other order.

Step 415:MeNB sends SCG to SeNB and has reshuffled message.Or MeNB sends prothetic group station amendment response instruction SCG to SeNB and has reshuffled, and this patent does not limit concrete signaling title.

Step 416: after UE performs the random access procedure with SeNB, it carries out packet data transmission (comprising uplink and downlink) with key K eNB2 and the SeNB after renewal.After step 408, SeNB receives the PDCP PDU encrypted by the encryption key (being derived by the key K eNB2 after upgrading) after upgrading.When SeNB find UE successful execution Stochastic accessing (step 413) time, it sends new data to UE, new data refer to specific PDU after the data to receive from MeNB of SeNB.

In step 414, UE after knowing key updating, for separation be carried as SeNB branch road perform rlc layer rebuild and MAC layer reset.

In one implementation, UE can determine owing to there is key updating automatically as SeNB branch road execution rlc layer reconstruction and MAC layer are reseted.

In another implementation, connect reconfiguration message by RRC in step 411 to should be SeNB branch road to UE instruction and perform rlc layer and to rebuild and MAC layer is reseted.

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

Identical with method 400, in method 500, MeNB indicates by sending key updating at control plane to SeNB and sends specific PDU by GTP tunnel to SeNB, indicates key updating and key updating at which PDU to come into force to SeNB.In method 400 and 500, similar Reference numeral represents same or similar operation.

Difference between method 500 and method 400 is mainly:

1, in method 400, UE, after receiving RRC and connecting reconfiguration message (step 403), suspends the transfer of data (step 404) with SeNB; And in method 500, UE, after receiving RRC and connecting reconfiguration message (step 503), continues the transfer of data (step 504) with SeNB.

2, in method 400, UE only carries out a PDCP status report (not shown) to MeNB carrying out the rear of key updating; And in method 500, owing to not suspending the transfer of data between UE and SeNB, therefore when UE and SeNB perform random access procedure (step 513) with perform L2 synchronous time (for be separated carrying SeNB branch road implement rlc layer rebuild and MAC layer reset), UE needs again to send PDCP status report to MeNB, makes MeNB can determine whether to send to the PDCP PDU (step 514 in Fig. 5) of UE during key updating process.That is, in method 500, UE has carried out twice PDCP status report to MeNB.

Or, UE can continue the transfer of data with SeNB, until it performs the rear of switching within cell in MeNB have sent PDCP status report to MeNB, now UE and SeNB perform random access procedure with perform L2 synchronous time do not need again to send PDCP status report.

Fig. 6 shows the flow chart of the method 600 for carrying out key updating under the communication environment of dual link according to a fourth embodiment of the present invention.In method 600, MeNB obtain with SeNB synchronous after, MeNB triggering UE perform key updating.Meanwhile, UE and SeNB performs L2 synchronous (that is, the rlc layer of SeNB branch road rebuild and MAC layer is reseted).

With similar in method 400 and 500, in method 600, MeNB indicates by sending key updating at control plane to SeNB and sends specific PDU by GTP tunnel to SeNB, indicates key updating and key updating at which PDU to come into force to SeNB.The execution flow process of method 600 is as described below, but is appreciated that some steps wherein can perform not in accordance with shown and described order.

Step 601:UE establishes dual link with MeNB and SeNB, and this UE uses 3C user plane framework.Now, UE is in the dual link communication environment with MeNB and SeNB, uses old encryption key (encryption key of being derived by the key K eNB1 before upgrading) to carry out data communication with MeNB and SeNB.

Step 602: the MME in Access Network sends UE context modification request to MeNB, wherein comprises the key (being such as called key K eNB2) after renewal and 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 key updating after), MeNB sends security key update instruction will there is key updating (as Suo Shi the step 603 in Fig. 6) to SeNB instruction by the X2 interface between MeNB and SeNB to SeNB, and sends specific PDU with the moment (as Suo Shi the step 604 in Fig. 6) of coming into force to the key K eNB2 after SeNB instruction renewal by GTP tunnel to SeNB.

In this article, this specific PDU can be the PDU with ad hoc structure or content, and SeNB can be known, and the PDCP PDU after this specific PDU uses the encryption key after upgrading (being derived by the key K eNB2 after upgrading) to encrypt.That is, the PDCP PDU before this specific PDU uses old encryption key (being derived by KeNB1) to be encrypted, and the PDCP PDU after this specific PDU uses new encryption key (being derived by KeNB2) to be encrypted.It should be noted that, for the separation carrying adopting 3C framework, the PDCP entity in MeNB is PDCP PDU to the RLC entity transmission in SeNB; For the RLC entity in SeNB, reception be RLC SDU.

After receiving and indicating (step 603 in Fig. 6) and specific PDU (step 604 in Fig. 6) from the security key update of MeNB, SeNB reconfigures Radio Resource for this UE, and notifies that SeNB is the Radio Resource (step 605 in Fig. 6) that this UE reconfigures to MeNB.Such as, SeNB can distribute special targeting sequencing for this UE.

Afterwards, MeNB triggers UE and carries out key updating, and it is synchronous to make UE and SeNB carry out L2.

Step 606: after receiving SeNB and being the Radio Resource (step 605 in Fig. 6) that reconfigures of UE, MeNB sends RRC to UE and connects reconfiguration message and notify that UE performs key updating, and reshuffles the SCG be associated with this SeNB.

Here, MeNB comes to notify key updating to UE by arranging key change designator (being such as set to very by keyChangeIndicator) comprised in RRC connection reconfiguration message.And connecting in reconfiguration message at this RRC, indicating the SCG to being associated with SeNB to reshuffle.

Step 607: after receiving this RRC and connecting reconfiguration message, UE performs switching within cell, and obtain the key K eNB2 after upgrading according to root key KASME.

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

Step 610: the RRC received in response to step 606 connects reconfiguration message, UE, after the random access procedure performing the key updating of step 607 and step 608 and 609, sends RRC to MeNB and connects and reshuffled message indicate key updating in MeNB successfully.With similar above, step 610 can perform with step 608 is independent, also can be contained in step 608.

In step 611, UE after knowing key updating, for separation be carried as SeNB branch road perform rlc layer rebuild and MAC layer reset.

In another implementation, connect reconfiguration message by RRC in step 605 to should be SeNB branch road to UE instruction and perform rlc layer and to rebuild and MAC layer is reseted.

Next, in step 612: when the MeNB RRC received from UE connect reshuffled message and learn key updating in MeNB success time, MeNB sends UE contextual modifications response message to MME, to report that the key updating in MeNB is successful to MME.

Step 613:MeNB sends SCG to SeNB and has reshuffled message.

Step 614: after UE performs the random access procedure with SeNB, it carries out packet data transmission with key K eNB2 and the SeNB after renewal, namely transmitted data are all implement encryption with new encryption key, new encryption key is derived by KeNB2, the concrete method implementing to encrypt, decipher belongs to prior art, does not launch to describe herein.

As can be seen from the above description, specific PDU is sent to indicate the moment that key updating occurs by GTP tunnel to SeNB for method 300,400 and 500, MeNB.Before this specific PDU, PDCP PDU is by old encryption keys, and after this specific PDU, PDCP PDU is by new encryption keys.

In addition, method 300,400 and 500, UE are needed to rebuild and MAC layer is reseted for SeNB branch road performs rlc layer, and SeNB should be discarded in this specific PDU before all data of buffer memory.Reconfiguration message can be connected by RRC to carry out to UE the rlc layer that notifies to perform SeNB branch road and to rebuild and MAC layer is reseted, or the rlc layer that can automatically perform SeNB branch road by UE after knowledge of secret keys upgrades rebuilds and MAC layer is reseted, thus make between SeNB and UE that to realize L2 synchronous for the DRB of separation.

Describe respectively according to the device 700-900 realized in dominant base or by dominant base MeNB of each embodiment of the present invention and the device 1000-1200 that realizes in UE or by UE below with reference to Fig. 7-Figure 12.Wherein, device 700 can with device 1000 collaborative work, device 800 can with device 1100 collaborative work, device 900 can with device 1200 collaborative work.

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

Device 700 comprises the first transmitting element 710, for when key updating will be carried out, send (303) first wireless heterogeneous networks (RRC) to UE and connect reconfiguration message to notify UE execution key updating and to discharge the auxiliary cell set (SCG) be associated with SeNB, wherein SCG refers to the group of the server carrier be associated with SeNB; Second transmitting element 720, for sending (307) SeNB releasing request message to discharge the communication connection between SeNB and UE to SeNB; First receiving element 730, for receiving (308) SeNB release response message from SeNB, SeNB release response message is used to indicate SeNB and has released the communication connection with UE; 3rd transmitting element 740, for receive (306) to from UE the one RRC connection reshuffled message after, (310) SeNB interpolation request message for UE is sent to SeNB, to ask SeNB to set up and the dual link of UE, wherein a RRC connects and has reshuffled message and be used to indicate key updating success in MeNB; Second receiving element 750, for adding request message in response to SeNB, receive (311) SeNB interpolation response message from SeNB and add request message to indicate SeNB to accept SeNB, wherein SeNB adds the configuration information that response message comprises SeNB; 4th transmitting element 760, connect reconfiguration message for sending (312) the 2nd RRC to UE, the 2nd RRC connects the configuration information that reconfiguration message comprises SeNB; 3rd receiving element 770, for connecting reconfiguration message in response to the 2nd RRC, receive (313) and reshuffled message from the 2nd RRC connection of UE, the 2nd RRC connection has been reshuffled message and has been 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 the schematic diagram of the device 800 of key updating in dual link communication environment in MeNB.Wherein there is dual link between a UE and dominant base MeNB and prothetic group station SeNB.

Device 800 comprises: the first transmitting element 810, for when carrying out key updating, sends (403,503) the first wireless heterogeneous networks (RRC) connect reconfiguration message to notify that UE performs key updating to UE; First receiving element 820, for connecting reconfiguration message in response to a RRC, receive (406,506) to connect from the RRC of UE and reshuffled message, wherein a RRC connects and has reshuffled message and be used to indicate key updating in MeNB success; Second transmitting element 830, for sending the instruction of (407,507) security key update will there is key updating to SeNB instruction to SeNB; 3rd transmitting element 840, for after receiving a RRC connection and having reshuffled message, send (408,508) specific cluster data cell (PDU) by GTP tunnel to SeNB, use the key after upgrading to be encrypted to indicate the PDU after specific PDU to SeNB; Second receiving element 850, for receiving from SeNB the information that (409,509) SeNB is the Radio Resource that UE reconfigures; 4th transmitting element 860, for connecting reconfiguration message to UE transmission (411,511) the 2nd RRC, the 2nd RRC connects reconfiguration message and comprises the information that SeNB is the Radio Resource that UE reconfigures; 3rd receiving element 870, for connecting reconfiguration message in response to the 2nd RRC, receive (412,512) and reshuffled message from the 2nd RRC connection of UE, the 2nd RRC connection has been reshuffled message and has been used to indicate the configuration information that UE has known SeNB.

In one implementation, UE, when receiving a RRC and connecting reconfiguration message, suspends the transfer of data of (404) and SeNB.

In another implementation, UE is when receiving a RRC and connecting reconfiguration message, continue the transfer of data of (504) and SeNB, and in this realization, device 800 also comprises: the 4th receiving element 880, after completing at the random access procedure of UE and SeNB, receive (514) PDCP (PDCP) status report from UE, to determine the data sending to UE during key updating process.

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

Device 900 comprises: the first transmitting element 910, for when carrying out key updating, sends the instruction of (603) security key update will there is key updating to SeNB instruction to SeNB; Second transmitting element 920, for sending (604) specific cluster data cell (PDU) by GTP tunnel to SeNB, uses the key after upgrading to be encrypted to indicate the PDU after specific PDU to SeNB; First receiving element 930, for receiving from SeNB the information that (605) SeNB is the Radio Resource that UE reconfigures; 3rd transmitting element 940, reconfiguration message is connected for sending (606) RRC to UE, to notify that UE performs key updating and reshuffles the auxiliary cell set (SCG) be associated with SeNB, wherein SCG refers to the group of the server carrier be associated with SeNB; Second receiving element 950, for connecting reconfiguration message in response to RRC, receiving (610) and connecting from the RRC of UE and reshuffled message, and RRC connects and reshuffled message and be used to indicate key updating in MeNB success.

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

Device 1000 comprises: the first receiving element 1010, reconfiguration message is connected for receiving (303) first wireless heterogeneous networks (RRC) from MeNB, wherein a RRC connects reconfiguration message for notifying UE execution key updating and discharging the auxiliary cell set (SCG) be associated with SeNB, and SCG refers to the group of the server carrier be associated with SeNB; Key updating units 1020, for obtaining the key after (304) renewal according to root key; First transmitting element 1030, has reshuffled message for sending (306) the one RRC connections to MeNB, has completed to indicate the key updating in MeNB; Second receiving element 1040, connect reconfiguration message for receiving (312) the 2nd RRC from MeNB, the 2nd RRC connects the configuration information that reconfiguration message comprises SeNB; Second transmitting element 1050, for connecting reconfiguration message in response to the 2nd RRC, sending (313) the 2nd RRC connections to MeNB and having reshuffled message, with the configuration information indicating UE to know SeNB.

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

Device 1100 comprises: the first receiving element 1110, connects reconfiguration message for receiving (403,503) the first wireless heterogeneous networks (RRC) from MeNB, and a RRC connects reconfiguration message for notifying that UE performs key updating; Key updating units 1120, for obtaining the key after (404,504) renewal according to root key; First transmitting element 1130, for connecting reconfiguration message in response to a RRC, to MeNB send (406,506) the one RRC connect and reshuffled message, wherein a RRC connects and has reshuffled message and be used to indicate key updating in MeNB success; Second receiving element 1140, for connecting reconfiguration message from MeNB reception (411,511) the 2nd RRC, the 2nd RRC connects the information that reconfiguration message comprises the Radio Resource that SeNB reconfigures; Second transmitting element 1150, for connecting reconfiguration message in response to the 2nd RRC, connecting to MeNB transmission (412,512) the 2nd RRC and having reshuffled message, with the information indicating UE to know the Radio Resource that SeNB reconfigures.

In one implementation, device 1100 also comprises time-out unit 1160, for when receiving a RRC and connecting reconfiguration message, suspends the transfer of data of (404) and SeNB.

In another implementation, device 1100 also comprises continuation unit 1170, for when receiving a RRC and connecting reconfiguration message, continue the transfer of data of (504) and SeNB, and in this realization, device 1100 also comprises: the 3rd transmitting element 1180, after completing at the random access procedure with SeNB, (514) PDCP (PDCP) status report is sent, to determine the data sending to UE during key updating process to MeNB.

In one implementation, device 1100 also comprises reconstruction unit 1190, after completing at the random access procedure with SeNB, for separation be carried as SeNB branch road carry out wireless spread-spectrum technology (RLC) layer rebuild and media interviews control (MAC) layer reset.

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

Device 1200 comprises: receiving element 1210, reconfiguration message is connected for receiving (606) wireless heterogeneous networks (RRC) from MeNB, RRC connects reconfiguration message for notifying that UE performs key updating and reshuffles the auxiliary cell set (SCG) be associated with SeNB, and wherein SCG refers to the group of the server carrier be associated with SeNB; Key updating units 1220, for obtaining the key after (607) renewal according to root key; Transmitting element 1230, for connecting reconfiguration message in response to RRC, sending (610) RRC to MeNB and connecting and reshuffled message, and RRC connects and reshuffled message and be used to indicate key updating in MeNB success.

Here, with reference to accompanying drawing, method and apparatus disclosed herein is described.But be to be understood that, shown in accompanying drawing and described in specification sequence of steps is only schematic, without departing from the scope of the claims, these method steps and/or action can perform according to different orders and the concrete order that be not limited to described in shown in accompanying drawing and specification.

In one or more exemplary design, the function that can realize described in the application by hardware, software, firmware or their combination in any.If realized with software, then can using described function as one or more instruction or code storage on a computer-readable medium, or transmit as the one or more instruction on computer-readable medium or code.Computer-readable medium comprises computer-readable storage medium and communication media, and wherein communication media comprises and contributes to computer program is delivered to another place arbitrary medium from a place.Storage medium can be the addressable any usable medium of universal or special computer.This computer-readable medium can comprise, such as but not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disc memory apparatus, disk storage device or other magnetic storage apparatus, or can be used for other medium any carrying or store the code modules of hope with the form of universal or special computer or the addressable instruction of universal or special processor or data structure.Further, any connection also can be known as computer-readable medium.Such as, if software be use coaxial cable, optical fiber cable, twisted-pair feeder, the wireless technology of Digital Subscriber Line (DSL) or such as infrared ray, radio and microwave and so on is come from website, server or other remote source, so the wireless technology of coaxial cable, optical fiber cable, twisted-pair feeder, DSL or such as infrared ray, radio and microwave and so on is also included within the definition of medium.

Can realize by general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or the combination in any for performing function as herein described or perform in conjunction with various exemplary logical block, module and the circuit described by the disclosure.General processor can be microprocessor, or processor also can be the processor of any routine, controller, microcontroller or state machine.Processor also can be implemented as the combination of computing equipment, such as, and the combination of the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessor and DSP kernel, or other this kind of structure any.

Those of ordinary skill in the art it is also understood that various exemplary logical block, module, circuit and algorithm steps that the embodiment in conjunction with the application describes can be embodied as electronic hardware, computer software or the combination of the two.In order to clearly represent this interchangeability between hardware and software, all around its function, general description is carried out to various exemplary parts, block, module, circuit and step above.Be embodied as hardware as this function or be embodied as software, the design constraint depending on specific application and apply over the whole system.Those skilled in the art for often kind of application-specific, can realize described function in the mode of accommodation, but, thisly realize decision-making and should not be construed as and deviate from protection scope of the present invention.

Above description of the present disclosure is for enabling any those of ordinary skill of this area realize or use the present invention.To those skilled in the art, various amendment of the present disclosure is all apparent, and general principle defined herein also can be applied to other distortion when not departing from spirit of the present invention and protection range.Therefore, the present invention is not limited to example as herein described and design, but consistent with the widest scope of principle disclosed herein and novel features.

Claims

1. for carrying out a method for key updating in dual link communication environment in dominant base, wherein subscriber equipment (UE) and there is dual link between described dominant base and a prothetic group station, described method comprises:

When key updating will be carried out, send (303) first wireless heterogeneous networks (RRC) to described UE and connect reconfiguration message to notify described UE execution key updating and to discharge the auxiliary cell set (SCG) be associated with described prothetic group station, wherein SCG refers to the group of the server carrier be associated with described prothetic group station;

(307) prothetic group station releasing request message is sent to discharge the communication connection between described prothetic group station and described UE to described prothetic group station;

Receive (308) prothetic group station release response message from described prothetic group station, described prothetic group station release response message is used to indicate described prothetic group station and has released the communication connection with described UE;

Receive (306) to from described UE the one RRC connection reshuffled message after, send (310) to described prothetic group station and add request message for the prothetic group station of described UE, to ask described prothetic group station to be set up and the dual link of described UE, a wherein said RRC connects and has reshuffled message and be used to indicate key updating success in described dominant base;

Request message is added in response to described prothetic group station, receive interpolation response message in (311) prothetic group station from described prothetic group station and add request message to indicate described prothetic group station to accept described prothetic group station, the configuration information that response message comprises described prothetic group station is added at wherein said prothetic group station;

Send (312) the 2nd RRC to described UE and connect reconfiguration message, described 2nd RRC connects the configuration information that reconfiguration message comprises described prothetic group station;

Connect reconfiguration message in response to described 2nd RRC, receive (313) and reshuffled message from the 2nd RRC connection of described UE, described 2nd RRC connection has been reshuffled message and has been used to indicate the configuration information that described UE has known described prothetic group station.

2. the method for claim 1, also comprises: described UE initiatively discharges the configuration information of the auxiliary cell set be associated with described prothetic group station when performing key updating.

3. the method for claim 1, also comprises: described dominant base independently initiates key updating, or the key trigger key after the renewal that provides according to core net of described dominant base upgrades.

4. for carrying out a method for key updating in dual link communication environment in dominant base, wherein subscriber equipment (UE) and there is dual link between described dominant base and a prothetic group station, described method comprises:

When key updating will be carried out, send (403,503) the first wireless heterogeneous networks (RRC) to described UE and connect reconfiguration message to notify that described UE performs key updating;

Reconfiguration message is connected in response to a described RRC, receive (406,506) to connect from the RRC of described UE and reshuffled message, a wherein said RRC connects and has reshuffled message and be used to indicate key updating in described dominant base success;

The instruction of (407,507) security key update is sent key updating will be there is to the instruction of described prothetic group station to described prothetic group station;

After receiving a described RRC connection and having reshuffled message, send (408,508) specific cluster data cell (PDU) by GTP tunnel to described prothetic group station, use the key after upgrading to be encrypted with the PDU after the described specific PDU of described prothetic group station instruction;

The information that (409,509) described prothetic group station is the Radio Resource that described UE reconfigures is received from described prothetic group station;

Connect reconfiguration message to described UE transmission (411,511) the 2nd RRC, described 2nd RRC connects reconfiguration message and comprises the information that described prothetic group station is the Radio Resource that described UE reconfigures;

Reconfiguration message is connected in response to described 2nd RRC, receive (412,512) and reshuffled message from the 2nd RRC connection of described UE, described 2nd RRC connection has been reshuffled message and has been used to indicate the configuration information that described UE has known described prothetic group station.

5. method as claimed in claim 4, wherein said UE, when receiving a described RRC and connecting reconfiguration message, suspends the transfer of data at (404) and described prothetic group station.

6. method as claimed in claim 4, wherein said UE, when receiving a described RRC and connecting reconfiguration message, continue the transfer of data at (504) and described prothetic group station, and described method also comprises:

After the random access procedure at described UE and described prothetic group station completes, receive (514) PDCP (PDCP) status report from described UE, to determine the data sending to described UE during key updating process.

7. for carrying out a method for key updating in dual link communication environment in dominant base, wherein subscriber equipment (UE) and there is dual link between described dominant base and a prothetic group station, described method comprises:

When key updating will be carried out, send the instruction of (603) security key update to described prothetic group station key updating will be there is to the instruction of described prothetic group station;

Send (604) specific cluster data cell (PDU) by GTP tunnel to described prothetic group station, use the key after upgrading to be encrypted with the PDU after the described specific PDU of described prothetic group station instruction;

The information that (605) described prothetic group station is the Radio Resource that described UE reconfigures is received from described prothetic group station;

Send (606) RRC to described UE and connect reconfiguration message, to notify that described UE performs key updating and reshuffles the auxiliary cell set (SCG) be associated with described prothetic group station, wherein SCG refers to the group of the server carrier be associated with described prothetic group station;

Connect reconfiguration message in response to described RRC, receive (610) and connect from the RRC of described UE and reshuffled message, described RRC connects and has reshuffled message and be used to indicate key updating success in described dominant base.

8., for carrying out a method for key updating in dual link communication environment in subscriber equipment (UE), there is dual link between a wherein said UE and dominant base and a prothetic group station, described method comprises:

Receive (303) first wireless heterogeneous networks (RRC) from described dominant base and connect reconfiguration message, a wherein said RRC connects reconfiguration message and performs key updating for notifying described UE and discharge the auxiliary cell set (SCG) be associated with described prothetic group station, and SCG refers to the group of the server carrier be associated with described prothetic group station;

The key after (304) renewal is obtained according to root key;

Send (306) the one RRC connections to described dominant base and reshuffled message, complete to indicate the key updating in described dominant base;

Receive (312) the 2nd RRC from described dominant base and connect reconfiguration message, described 2nd RRC connects the configuration information that reconfiguration message comprises described prothetic group station;

Connect reconfiguration message in response to described 2nd RRC, send (313) the 2nd RRC connections to described dominant base and reshuffled message, with the configuration information indicating described UE to know described prothetic group station.

9., for carrying out a method for key updating in dual link communication environment in subscriber equipment (UE), there is dual link between a wherein said UE and dominant base and a prothetic group station, described method comprises:

Receive (403,503) the first wireless heterogeneous networks (RRC) from described dominant base and connect reconfiguration message, a described RRC connects reconfiguration message and is used for notifying that described UE performs key updating;

The key after (404,504) renewal is obtained according to root key;

Reconfiguration message is connected in response to a described RRC, to described dominant base send (406,506) the one RRC connect and reshuffled message, a wherein said RRC connects and has reshuffled message and be used to indicate key updating success in described dominant base;

Connect reconfiguration message from described dominant base reception (411,511) the 2nd RRC, described 2nd RRC connects the information that reconfiguration message comprises the Radio Resource that described prothetic group station reconfigures;

Connect reconfiguration message in response to described 2nd RRC, connect to described dominant base transmission (412,512) the 2nd RRC and reshuffled message, with the information indicating described UE to know the Radio Resource that described prothetic group station reconfigures.

10. method as claimed in claim 9, also comprises:

When receiving a described RRC and connecting reconfiguration message, suspend the transfer of data at (404) and described prothetic group station.

11. methods as claimed in claim 9, also comprise:

When receiving a described RRC and connecting reconfiguration message, continue the transfer of data at (504) and described prothetic group station, and described method also comprises:

After the random access procedure with described prothetic group station completes, send (514) PDCP (PDCP) status report, to determine the data sending to described UE during key updating process to described dominant base.

12. methods as claimed in claim 9, also comprise:

After the random access procedure with described prothetic group station completes, for separation be carried as described auxiliary base station leg carry out wireless spread-spectrum technology (RLC) layer rebuild and media interviews control (MAC) layer reset.

13. 1 kinds for carrying out the method for key updating in dual link communication environment in subscriber equipment (UE), there is dual link between a wherein said UE and dominant base and a prothetic group station, described method comprises:

Receive (606) wireless heterogeneous networks (RRC) from described dominant base and connect reconfiguration message, described RRC connects reconfiguration message for notifying that described UE performs key updating and reshuffles the auxiliary cell set (SCG) be associated with described prothetic group station, and wherein SCG refers to the group of the server carrier be associated with described prothetic group station;

The key after (607) renewal is obtained according to root key;

Connect reconfiguration message in response to described RRC, send (610) RRC connect and reshuffled message to described dominant base, described RRC connects and has reshuffled message and be used to indicate key updating success in described dominant base.

14. 1 kinds for carrying out the device of key updating in dual link communication environment in dominant base, wherein subscriber equipment (UE) and there is dual link between described dominant base and a prothetic group station, described device comprises:

First transmitting element, for when key updating will be carried out, send (303) first wireless heterogeneous networks (RRC) to described UE and connect reconfiguration message to notify described UE execution key updating and to discharge the auxiliary cell set (SCG) be associated with described prothetic group station, wherein SCG refers to the group of the server carrier be associated with described prothetic group station;

Second transmitting element, for sending (307) prothetic group station releasing request message to discharge the communication connection between described prothetic group station and described UE to described prothetic group station;

First receiving element, for receiving (308) prothetic group station release response message from described prothetic group station, described prothetic group station release response message is used to indicate described prothetic group station and has released the communication connection with described UE;

3rd transmitting element, for receive (306) to from described UE the one RRC connection reshuffled message after, send (310) to described prothetic group station and add request message for the prothetic group station of described UE, to ask described prothetic group station to be set up and the dual link of described UE, a wherein said RRC connects and has reshuffled message and be used to indicate key updating success in described dominant base;

Second receiving element, for adding request message in response to described prothetic group station, receive interpolation response message in (311) prothetic group station from described prothetic group station and add request message to indicate described prothetic group station to accept described prothetic group station, the configuration information that response message comprises described prothetic group station is added at wherein said prothetic group station;

4th transmitting element, connect reconfiguration message for sending (312) the 2nd RRC to described UE, described 2nd RRC connects the configuration information that reconfiguration message comprises described prothetic group station;

3rd receiving element, for connecting reconfiguration message in response to described 2nd RRC, receive (313) and reshuffled message from the 2nd RRC connection of described UE, described 2nd RRC connection has been reshuffled message and has been used to indicate the configuration information that described UE has known described prothetic group station.

15. 1 kinds for carrying out the device of key updating in dual link communication environment in dominant base, wherein subscriber equipment (UE) and there is dual link between described dominant base and a prothetic group station, described device comprises:

First transmitting element, for when carrying out key updating, sends (403,503) the first wireless heterogeneous networks (RRC) to described UE and connects reconfiguration message to notify that described UE performs key updating;

First receiving element, for connecting reconfiguration message in response to a described RRC, receive (406,506) to connect from the RRC of described UE and reshuffled message, a wherein said RRC connects and has reshuffled message and be used to indicate key updating in described dominant base success;

Second transmitting element, for sending the instruction of (407,507) security key update will there is key updating to the instruction of described prothetic group station to described prothetic group station;

3rd transmitting element, for after receiving a described RRC connection and having reshuffled message, send (408,508) specific cluster data cell (PDU) by GTP tunnel to described prothetic group station, use the key after upgrading to be encrypted with the PDU after the described specific PDU of described prothetic group station instruction;

Second receiving element, for receiving from described prothetic group station the information that (409,509) described prothetic group station is the Radio Resource that described UE reconfigures;

4th transmitting element, for connecting reconfiguration message to described UE transmission (411,511) the 2nd RRC, described 2nd RRC connects reconfiguration message and comprises the information that described prothetic group station is the Radio Resource that described UE reconfigures;

3rd receiving element, for connecting reconfiguration message in response to described 2nd RRC, receive (412,512) and reshuffled message from the 2nd RRC connection of described UE, described 2nd RRC connection has been reshuffled message and has been used to indicate the configuration information that described UE has known described prothetic group station.

16. 1 kinds for carrying out the device of key updating in dual link communication environment in dominant base, wherein subscriber equipment (UE) and there is dual link between described dominant base and a prothetic group station, described device comprises:

First transmitting element, for when carrying out key updating, sends the instruction of (603) security key update will there is key updating to the instruction of described prothetic group station to described prothetic group station;

Second transmitting element, for sending (604) specific cluster data cell (PDU) by GTP tunnel to described prothetic group station, uses the key after upgrading to be encrypted with the PDU after the described specific PDU of described prothetic group station instruction;

First receiving element, for receiving from described prothetic group station the information that (605) described prothetic group station is the Radio Resource that described UE reconfigures;

3rd transmitting element, reconfiguration message is connected for sending (606) RRC to described UE, to notify that described UE performs key updating and reshuffles the auxiliary cell set (SCG) be associated with described prothetic group station, wherein SCG refers to the group of the server carrier be associated with described prothetic group station;

Second receiving element, for connecting reconfiguration message in response to described RRC, receive (610) to connect from the RRC of described UE and reshuffled message, described RRC connects and has reshuffled message and be used to indicate key updating success in described dominant base.

17. 1 kinds for carrying out the device of key updating in dual link communication environment in subscriber equipment (UE), there is dual link between a wherein said UE and dominant base and a prothetic group station, described device comprises:

First receiving element, reconfiguration message is connected for receiving (303) first wireless heterogeneous networks (RRC) from described dominant base, a wherein said RRC connects reconfiguration message and performs key updating for notifying described UE and discharge the auxiliary cell set (SCG) be associated with described prothetic group station, and SCG refers to the group of the server carrier be associated with described prothetic group station;

Key updating units, for obtaining the key after (304) renewal according to root key;

First transmitting element, has reshuffled message for sending (306) the one RRC connections to described dominant base, has completed to indicate the key updating in described dominant base;

Second receiving element, connect reconfiguration message for receiving (312) the 2nd RRC from described dominant base, described 2nd RRC connects the configuration information that reconfiguration message comprises described prothetic group station;

Second transmitting element, for connecting reconfiguration message in response to described 2nd RRC, sending (313) the 2nd RRC connections to described dominant base and having reshuffled message, with the configuration information indicating described UE to know described prothetic group station.

18. 1 kinds for carrying out the device of key updating in dual link communication environment in subscriber equipment (UE), there is dual link between a wherein said UE and dominant base and a prothetic group station, described device comprises:

First receiving element, connects reconfiguration message for receiving (403,503) the first wireless heterogeneous networks (RRC) from described dominant base, and a described RRC connects reconfiguration message and is used for notifying that described UE performs key updating;

Key updating units, for obtaining the key after (404,504) renewal according to root key;

First transmitting element, for connecting reconfiguration message in response to a described RRC, to described dominant base send (406,506) the one RRC connect and reshuffled message, a wherein said RRC connects and has reshuffled message and be used to indicate key updating success in described dominant base;

Second receiving element, for connecting reconfiguration message from described dominant base reception (411,511) the 2nd RRC, described 2nd RRC connects the information that reconfiguration message comprises the Radio Resource that described prothetic group station reconfigures;

Second transmitting element, for connecting reconfiguration message in response to described 2nd RRC, connect to described dominant base transmission (412,512) the 2nd RRC and reshuffled message, with the information indicating described UE to know the Radio Resource that described prothetic group station reconfigures.

19. 1 kinds for carrying out the device of key updating in dual link communication environment in subscriber equipment (UE), there is dual link between a wherein said UE and dominant base and a prothetic group station, described device comprises:

Receiving element, reconfiguration message is connected for receiving (606) wireless heterogeneous networks (RRC) from described dominant base, described RRC connects reconfiguration message for notifying that described UE performs key updating and reshuffles the auxiliary cell set (SCG) be associated with described prothetic group station, and wherein SCG refers to the group of the server carrier be associated with described prothetic group station;

Key updating units, for obtaining the key after (607) renewal according to root key;

Transmitting element, for connecting reconfiguration message in response to described RRC, sending (610) RRC to described dominant base and connecting and reshuffled message, and described RRC connects and reshuffled message and be used to indicate key updating success in described dominant base.