CN104219722A - Double-connection radio bearer migration treatment method, double-connection radio bearer migration method and double-connection radio bearer migration device - Google Patents
Double-connection radio bearer migration treatment method, double-connection radio bearer migration method and double-connection radio bearer migration device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention provides a double-connection radio bearer migration treatment method, a double-connection radio bearer migration method and a double-connection radio bearer migration device. The double-connection radio bearer migration treatment method comprises the following steps of distributing new data wireless bearer marks for a data wireless bearer to be migrated by using a main base station; and transmitting information for informing user equipment of migrating the data wireless bearer towards the user equipment by using the main base station. The new data wireless bearer marks are different from data wireless bearer marks used by the main base station and data wireless bearer marks used by a slave base station; and the information carries the new wireless bearer marks. According to the technical scheme, the problem that the safety is low due to the fact that a secret key of a double-connection wireless bearer is exposed in a process of migration between the base stations in the prior art is solved, and the safety of the double-connection bearer of a terminal is improved.
Description
Technical field
The present invention relates to the communications field, especially relate to a kind of migration process of dual link radio bearer, moving method and device.
Background technology
Along with the continuous evolution of wireless communication technology and standard, mobile Packet Service obtains huge development, and the data throughput capabilities of unit/terminal is constantly in lifting.With Long Term Evolution (Long Term Evolution, LTE) system is example, the transfer of data of descending maximum rate 100Mbps can be supported in 20M bandwidth, in LTE (LTE Advanced) network of follow-up enhancing, the transmission rate of data will promote further, even can reach 1Gbps.
The user face data protocol stack of existing LTE as shown in Figure 1, from core net through user level GPRS (General Packet Radio Service, referred to as GPRS) tunnel protocol (GPRS Tunnelling Protocol for the User Plane, referred to as GTP-U) downlink data that receives, by PDCP (Packet Data Convergence Protocol after unpacking, referred to as PDCP) sublayer, wireless spread-spectrum technology (Radio Link Control, referred to as RLC) protocol sublayers, medium education (Medium Access Control, referred to as MAC) protocol sublayers and physical layer (PHYsics, referred to as PHY) process send to subscriber equipment (User Equipment, referred to as UE), the transmission of upstream data is just in time contrary with descending.Data transmission link between current network and UE is man-to-man private link, and therefore the signal quality of this link and the resource size of use determine data transmission performance between the two.If the resource that link uses is restricted or signal quality is poor, then the Consumer's Experience of UE will decline, Here it is the present huge challenge that facing of mobile operator, although network capacity increases year by year, but still be unable to catch up with the increase of user terminal quantity and user to the demand of data business volume, in FIG, IP is the abbreviation of Internet protocol (Internet Protocol), and UDP/IP is the abbreviation of User Data Protocol (User Date Protocol)/Internet protocol.
In order to meet the increased requirement of data business volume, and business geographically uneven feature, operator is in the process of disposing New Generation of Communication network (such as LTE), also at increase low power nodes (Low Power Node, referred to as LPN) or claim small-cell (Small Cell) or micro-base station (Pico eNB, wherein, eNB is the abbreviation of evolved Node B, and eNB can be called the Node B of evolution) carry out focus enhancing.Along with the increase of LPN community, network design environment becomes more complicated, also brings some problems simultaneously.First, because LPN community comparatively speaking coverage is much smaller compared to macrocell (Macro Cell), capacity is also relatively little, some LPN community may be taken by user easily and cause load too high, thus affect the throughput of user data, and other LPN community or macrocell can be on relatively low load level, if want balanced load, network side is needed to perform load balancing operation, but this process underaction, especially, when community is more, the load that the shortage of this flexibility causes is uneven just more serious; In addition, because LPN number of cells is many, therefore when subscriber equipment (or being called terminal) is moved in network, handover between cells (Handover) frequently can be caused, thus causing the problem such as data service terminal frequently or even call drop, this also can cause the data throughout of user and the decline of Consumer's Experience.Simultaneously this switching frequently also can cause terminal and network, and especially core net can receive a large amount of signalings and impacts, thus may cause that system resource is congested even paralyses.Along with operator and the increase of LPN number of cells disposed of individual in future, above-mentioned situation can be more and more serious, therefore many companies and operation commercial city are tended to seek a kind of new enhanced scheme at present, dual link (Dual Connectivity) is exactly one of them, under dual link, terminal can keep being connected with two network nodes simultaneously, such as UE keeps being connected with macrocell and LPN community simultaneously, when network load is unbalanced, network side can the transmitted data amount of real-time monitoring terminal on two nodes, if simultaneously UE move or other reasons causes LPN community to be changed time, another one community can also keep connecting, and this change can not cause too much signaling to be impacted.
But UE is connected to the network must ensure safety.Under single connection scene; according to existing protocol; as shown in Figure 2; Access Layer (Access Stratum between wireless access network element (such as eNB) and subscriber equipment; referred to as AS) have identical safe context; comprising base station key KeNB, encryption key (KRRCenc) and the tegrity protection key (KRRCint) of AS chain of command can be derived according to this key, and the encryption key in user face (KUPenc).When carrying out transfer of data between eNB and UE; transmitting terminal utilizes chain of command tegrity protection key (KRRCint) and encryption key (KRRCenc); and assignment algorithm implements integrity protection and encryption to chain of command data; then can perform reverse operating (deciphering and integrity protection checking) according to identical key and algorithm at receiving terminal, customer side encryption key (KUPenc) then can be utilized to encrypt and decrypt operation to user face data for user face data transmission and reception both sides.The initial KeNB of wherein said base station key is calculated by core net and then sends to eNB.In follow-up process, time such as preventing the upset of PDCP sequence number or UE from switching, KeNB also can upgrade.To switch to example, if the S1 occurred switches, then the KeNB switching target side is still calculated by core net; If but generation is that X2 switches, the derived method then switching the KeNB (or claiming KeNB*) of target side may have two kinds, as shown in Figure 3, a kind of is derived from by the KeNB switching source, another kind of by down hop (Next Hop, referred to as NH) key derivation, wherein NH key gives eNB by core net calculating and sending.
Under dual link scene, if what adopt is the data distribution method that non-bearing is separated, namely carrying is connected from gateway (Service-Gateway, referred to as S-GW) be divided into two groups, respectively by dominant base (Master eNB, referred to as MeNB) and connect from base station (Secondary SeNB, referred to as SeNB) and UE, as shown in Figure 4.UE and two nodes of access need to adopt different safe keys to protect respective connection to carry respectively.Base station key S-KeNB wherein on SeNB is derived from by the base station key KeNB on MeNB.When the KeNB of MeNB occurs to change, SeNB can be deleted; But when the S-KeNB on SeNB changes, the connection on MeNB is impregnable.The scene that S-KeNB occurs to change comprises: the S-KeNB caused by KeNB security key change on MeNB changes, the S-KeNB key amendment that MeNB initiatively initiates, when there is reversion in the PDCP COUNT value of the upper carrying of SeNB, or the security key change etc. that other SeNB reprovisions cause.
In reality, consider the change such as the mobility of UE and the load of network, the connection carrying of UE may be moved between MeNB and SeNB, and the carrying namely on MeNB may be migrated to SeNB, bears its data transmit-receive by SeNB; Also can occur reverse, namely on SeNB, MeNB is moved back in carrying.In this process, the mark of carrying can not change.In LTE system, the division methods of the carrying of UE has various ways, has multiple mark accordingly and corresponds to this carrying.Wherein base station side can be its distribute data radio bearer (Data Radio Bearer, referred to as DRB) mark (DRB id); Evolved packet system (Evolved Packet System can be distributed for it in core-network side, referred to as EPS) bearing identification (ESP id), with enhancing RAB (Enhanced Radio Access Bearer, referred to as E-RAB) mark (E-RAB id) etc.Wherein DRB id and EPS id and E-RAB id is one_to_one corresponding or mapping.If the radio bearer that certain DRB id of Access Layer is corresponding is deleted, the ground loading that the EPS id of its corresponding Non-Access Stratum is corresponding also needs deleted.In load bearing migration process under described dual link scene, the actual change just concerning its user plane path, its carrying can not change, and therefore the radio bearer identification of its correspondence and ground loading mark and its corresponding relation all can not change.
But this migration of carrying may bring the potential safety hazard of secret reuse.Have premised on respective separate keys based on foregoing MeNB and SeNB, as shown in Figure 5, originally the carrying 2 be on MeNB has been migrated to SeNB, on SeNB during transmission, the PDCP COUNT value of carrying 2 there occurs reversion, according to existing protocol, needs the renewal performing S-KeNB, but this can not have an impact to MeNB, its KeNB still remains unchanged.But when MeNB is moved back in carrying 2 again, just may occur that the packet of the same count value COUNT carried is added with close problem by same key reconsul, as shown in Figure 6, input key, bearing identification, count value COUNT etc. that now cryptographic algorithm is all can be reused, in security fields, the recycling of the encryption parameters such as key can cause the problems such as Key Exposure, therefore needs to stop this problem.
Summary of the invention
For in correlation technique, the problems such as dual link radio bearer exists Key Exposure and causes between base station fail safe in transition process, the invention provides a kind of migration process of dual link radio bearer, moving method and device, at least to solve the problems of the technologies described above.
In order to achieve the above object, according to an aspect of the present invention, provide a kind of emigration processing method of dual link radio bearer, comprise: dominant base is that Data Radio Bearer to be migrated distributes new Data Radio Bearer mark, wherein, described new Data Radio Bearer mark and described dominant base and from base station used Data Radio Bearer identify all different; Described dominant base sends to subscriber equipment and is used for the message that notifying user equipment carries out Data Radio Bearer migration, wherein, carries described new radio bearer identification in this message.
Preferably, there are mapping relations in the evolved packet system bearing identification that described new radio bearer identification is corresponding with described Data Radio Bearer.
Preferably, dominant base is before Data Radio Bearer to be migrated distributes new Data Radio Bearer mark, described method also comprises: described dominant base and/or described to carry out key updating from base station time, remove the Data Radio Bearer identification record that current data radio bearer does not use.
Preferably, before dominant base distributes new Data Radio Bearer mark, described method also comprises: described Data Radio Bearer migrates to behind base station by dominant base by described dominant base, move back dominant base by from base station by described Data Radio Bearer again, and/or the key of the source base station of load bearing migration there occurs renewal and the key of the target BS of load bearing migration upgrade.
In order to achieve the above object, according to a further aspect of the invention, additionally provide a kind of moving method of dual link radio bearer, comprise: subscriber equipment receives the message of carrying out Data Radio Bearer migration for notifying user equipment from dominant base, wherein, described message carries the new Data Radio Bearer mark that described dominant base distributes, this new Data Radio Bearer mark for identifying Data Radio Bearer to be migrated, described new Data Radio Bearer mark and described dominant base and from base station used Data Radio Bearer identify all different; Described Data Radio Bearer is migrated to target BS according to described new Data Radio Bearer mark by described subscriber equipment.
Preferably, when described Data Radio Bearer is migrated to target BS according to described new Data Radio Bearer mark by described subscriber equipment, described method also comprises: it is corresponding that described subscriber equipment makes described new Data Radio Bearer identify the evolved packet system bearing identification corresponding with described Data Radio Bearer, and deletes the original Data Radio Bearer mark of described Data Radio Bearer.
In order to achieve the above object, according to a further aspect of the invention, additionally provide a kind of migration process device of dual link radio bearer, be applied to dominant base, comprise: distribution module, for distributing new Data Radio Bearer mark for Data Radio Bearer to be migrated, wherein, described new Data Radio Bearer mark and described dominant base and from base station used Data Radio Bearer identify all different; Sending module, being used for for sending to subscriber equipment the message that notifying user equipment carries out Data Radio Bearer migration, wherein, carrying described new radio bearer identification in this message.
Preferably, when described distribution module also exists mapping relations for the evolved packet system bearing identification corresponding with described Data Radio Bearer at described new radio bearer identification, distribute described new Data Radio Bearer mark.
In order to achieve the above object, according to a further aspect of the invention, additionally provide a kind of moving apparatus of dual link radio bearer, comprise: receiver module, for receiving the message of carrying out Data Radio Bearer migration for notifying user equipment from dominant base, wherein, described message carries the new Data Radio Bearer mark that described dominant base distributes, this new Data Radio Bearer mark is for identifying Data Radio Bearer to be migrated, described new Data Radio Bearer mark and described dominant base and described from base station used Data Radio Bearer identify all different, transferring module, for migrating to target BS according to described new Data Radio Bearer mark by described Data Radio Bearer.
Preferably, also comprise: mapping block, corresponding for making described new Data Radio Bearer identify the evolved packet system bearing identification corresponding with described Data Radio Bearer, and delete the original Data Radio Bearer mark of described Data Radio Bearer.
In order to achieve the above object, according to a further aspect of the invention, additionally provide a kind of base station, comprise the migration process device of above-described dual link radio bearer.
In order to achieve the above object, according to a further aspect of the invention, additionally provide a kind of subscriber equipment, comprise the moving apparatus of above-described dual link radio bearer.
Pass through the present invention, adopt dominant base be Data Radio Bearer to be migrated distribute from dominant base and from base station used Data Radio Bearer identify the technological means that all different new Data Radio Bearer identifies, solve in correlation technique, there is Key Exposure in the transition process of dual link radio bearer between base station and the problems such as the fail safe that causes, improve the fail safe of the dual link carrying of terminal.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the LTE user face protocol stack schematic diagram according to correlation technique;
Fig. 2 is key derivation and protection mechanism schematic diagram in the network of correlation technique;
Fig. 3 is the method schematic diagram that under the handoff scenario according to correlation technique, base station key derives from;
Fig. 4 is according to the dual link scene schematic diagram of correlation technique;
Fig. 5 is the dual link secret reuse scene schematic diagram according to correlation technique;
Fig. 6 is the encryption method schematic diagram according to correlation technique;
Fig. 7 is the flow chart of the emigration processing method of dual link radio bearer according to the embodiment of the present invention;
Fig. 8 is the structured flowchart of the migration process device of dual link radio bearer according to the embodiment of the present invention;
Fig. 9 is the flow chart of the moving method of dual link radio bearer according to the embodiment of the present invention;
Figure 10 is the structured flowchart of the moving apparatus of dual link radio bearer according to the embodiment of the present invention;
Figure 11 is another structured flowchart of the moving apparatus of dual link radio bearer according to the preferred embodiment of the invention;
Figure 12 is the load bearing migration schematic flow sheet that dominant base active according to the preferred embodiment of the invention triggers;
Figure 13 is the load bearing migration schematic flow sheet initiatively triggered from base station according to the preferred embodiment of the invention;
Figure 14 is the load bearing migration schematic flow sheet initiatively triggered from base station according to the preferred embodiment of the invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
For in correlation technique, the problem such as fail safe caused due to secret reuse etc. in the transition process of dual link radio bearer between base station, following examples provide corresponding solution, as follows in detail.
Fig. 7 is the flow chart of the emigration processing method of dual link radio bearer according to the embodiment of the present invention.As shown in Figure 7, the method comprising the steps of S702-S706:
Step 702, dominant base is that Data Radio Bearer to be migrated distributes new Data Radio Bearer mark, wherein this new Data Radio Bearer mark and dominant base and from base station used Data Radio Bearer identify all different;
Step 704, dominant base sends to subscriber equipment and is used for the message that notifying user equipment carries out Data Radio Bearer migration, wherein carries new radio bearer identification corresponding to described Data Radio Bearer to be migrated in this message.
Each treatment step above-mentioned can be applied in the various migration scenes of radio bearer, and such as, from base station, original Data Radio Bearer moves to dominant base; Or the original Data Radio Bearer of dominant base moves to from base station; Or the Data Radio Bearer of dominant base migrates to behind base station, then migrates to dominant base by from base station.Especially for last a kind of situation, under the scene that Data Radio Bearer moves repeatedly, can reuse due to information such as keys and can cause the problems such as Key Exposure, and adopt the technological means of each treatment step above-mentioned, owing to have employed as Data Radio Bearer to be migrated distributes the new Data Radio Bearer identification technology means all different with the radio bearer identification that distributed from base station from dominant base, therefore, fundamentally avoid the multiplexing of the information such as key, improve fail safe when dual link is carried on load bearing migration.
Due in step S702, dominant base is that described Data Radio Bearer is assigned with new Data Radio Bearer mark, and do not re-use original Data Radio Bearer mark, therefore, subscriber equipment is after receiving message, need to reuse the evolved packet system bearing identification that new Data Radio Bearer mark is corresponding corresponding with described Data Radio Bearer, and can not the deletion of radio bearer of triggering upper layers indicate.
In step S704, the implementation of above-mentioned notification message has multiple, such as, can be realized by a newly-increased specific messages, existing message can also be utilized to realize.
For the ease of distributing new Data Radio Bearer mark, dominant base can record dominant base and the used Data Radio Bearer mark from base station.Described recorded information can be upgraded by key updating process, remove the no bearing identification record of present wireless bearing, such as: at dominant base and/or passive or when initiatively carrying out key updating from base station, Data Radio Bearer identification record that current data radio bearer do not use (i.e. present wireless bearing do not use Data Radio Bearer identification record) is removed.Particularly, following way of realization can be shown as:
When initiatively initiating key updating, dominant base can remove the no Data Radio Bearer identification record of current carrying; When there is no new Data Radio Bearer mark, dominant base and also can use key updating process to remove the Data Radio Bearer identification record do not used from base station, to regain radio bearer identification resource.
Illustrate above-mentioned bearing identification sweep-out method: if the used Data Radio Bearer of dominant base record is designated 1,2,3, but current dominant base and existence two Data Radio Bearer from base station, respectively in use mark 2 and 3, then by key updating process, the record of the current mark 1 do not re-used can be removed.
Scheme in the present embodiment can be applied to following scene but be not limited thereto: Data Radio Bearer is migrated to behind base station by dominant base by dominant base, then moves back dominant base by from base station by described Data Radio Bearer, and/or
The key of the source base station of load bearing migration there occurs renewal and the key of the target BS of load bearing migration upgrades.Wherein source/the target BS of load bearing migration is for Data Radio Bearer to be migrated.Illustrate, such as certain Data Radio Bearer has been moved to B base station by from A base station, then A base station is exactly the source base station of this load bearing migration, and B base station is exactly the target BS of load bearing migration.
In the present embodiment, additionally provide a kind of migration process device of dual link radio bearer, this application of installation is in dominant base, and for realizing said method, as shown in Figure 8, this device comprises:
Distribution module 80, for distributing new Data Radio Bearer mark for Data Radio Bearer to be migrated, wherein, this new Data Radio Bearer mark and dominant base and from base station used Data Radio Bearer identify all different;
Sending module 82, is connected to distribution module 80, being used for the message that notifying user equipment carries out Data Radio Bearer migration, wherein, carrying above-mentioned new radio bearer identification in this message for sending to subscriber equipment.
Preferably, when above-mentioned distribution module 80 also exists mapping relations for the evolved packet system bearing identification corresponding with Data Radio Bearer at above-mentioned new radio bearer identification, distribute above-mentioned new Data Radio Bearer mark.
It should be noted that, above-mentioned modules can be realized by software or hardware module, and for the latter, can show as following way of realization: distribution module 80 is arranged in first processor, sending module 82 can be arranged in the second processor; Or distribution module 80 and sending module 82 are all arranged in same processor, but are not limited thereto.
In the present embodiment, a kind of base station is also provided, comprises: the migration process device of above-described dual link radio bearer.
In the present embodiment, also provide a kind of moving method of dual link radio bearer, as shown in Figure 9, the method comprises:
Step S902, subscriber equipment receives the message of carrying out Data Radio Bearer migration for notifying user equipment from dominant base, wherein, this message carries the new Data Radio Bearer mark that dominant base distributes, this new Data Radio Bearer mark for identifying Data Radio Bearer to be migrated, above-mentioned new Data Radio Bearer mark and dominant base and from base station used Data Radio Bearer identify all different;
Step S904, Data Radio Bearer is migrated to target BS according to above-mentioned new Data Radio Bearer mark by subscriber equipment.
In a preferred implementation of the present embodiment, when Data Radio Bearer is migrated to target BS according to above-mentioned new Data Radio Bearer mark by subscriber equipment, it is corresponding that subscriber equipment needs the new Data Radio Bearer making described Data Radio Bearer to identify the evolved packet system bearing identification corresponding with this Data Radio Bearer, and delete the original Data Radio Bearer mark of described Data Radio Bearer.In this process, the deletion that Data Radio Bearer original Data Radio Bearer mark can not trigger evolved packet system carrying corresponding to described Data Radio Bearer and mark thereof is deleted.
Also provide a kind of moving apparatus of dual link radio bearer in the present embodiment, this device is used for realizing such scheme, can be applied to subscriber equipment, and as shown in Figure 10, this device comprises:
Receiver module 102, for receiving the message of carrying out Data Radio Bearer migration for notifying user equipment from dominant base, wherein, this message carries the new Data Radio Bearer mark that dominant base distributes, this new Data Radio Bearer mark for identifying Data Radio Bearer to be migrated, above-mentioned new Data Radio Bearer mark and dominant base and from base station used Data Radio Bearer identify all different;
Transferring module 104, for migrating to target BS according to above-mentioned new Data Radio Bearer mark by Data Radio Bearer.
Preferably, as shown in figure 11, said apparatus can also comprise: mapping block 106, for setting up the mapping relations of the new Data Radio Bearer mark evolved packet system bearing identification corresponding with Data Radio Bearer and deleting the mapping relations of the original Data Radio Bearer mark of Data Radio Bearer and evolved packet system bearing identification.
In the present embodiment, a kind of subscriber equipment is also provided, comprises: the moving apparatus of above-described dual link radio bearer.
In order to understand above-described embodiment better, describe in detail below in conjunction with preferred embodiment.Following preferred embodiment provides a kind of management method of dual link radio bearer, when making the connection of terminal be carried on generation migration between its base station simultaneously connected, avoids the problems such as secret reuse occur, thus ensures the fail safe of dual link.The main thought of following examples is:
Radio bearer is moved to the second base station (can for dominant base or from base station) during from the first base station (can for dominant base or from base station), need for it distributes new Data Radio Bearer mark, and make the evolved packet system bearing identification corresponding with this Data Radio Bearer again correspond to new radio bearer identification.New radio bearer identification will be different from other bearing identifications that the first base station and the second base station had been distributed; Further, when initiating key updating, the no bearing identification record of current carrying can be removed in the first base station and/or the second base station; When not having new radio bearer identification, the first base station and the second base station also can use key updating process to remove the bearing identification record do not used, to regain radio bearer identification resource.It should be noted that, " first " " second " described in above embodiment only relates to information or entity etc. for district office, does not form the improper restriction to involved information or entity.
Embodiment one
As shown in figure 12, UE and dominant base (i.e. MeNB) and keep dual link from base station (i.e. SeNB), wherein MeNB wishes A carrying (its data wireless is designated 1) on this base station to move on SeNB.
Step S1202, MeNB initiate amendment request to SeNB, wherein carry and need the A of migration to carry configuration information, comprise the new Data Radio Bearer mark for it distributes, suppose that new Data Radio Bearer is designated 2.Wherein MeNB needs to ensure that Data Radio Bearer mark 2 is not previously used.
Step S1204, SeNB generate amendment request response according to MeNB instruction.
Step S1206, MeNB initiate reconfigure command according to amendment request response to UE, wherein indicate UE, by A load bearing migration to SeNB, and are assigned with new Data Radio Bearer mark 2 for it.
Step S1208, UE has connected the migration of A carrying according to the command messages of MeNB with SeNB, the simultaneously UE mapping relations that will change radio bearer corresponding to A carrying and EPS and carry, delete Data Radio Bearer mark 1, and again make Data Radio Bearer identify 2 to set up with the EPS bearing identification of this carrying and map.Then UE initiates to rush configuration to MeNB and completes message.
Step S1210, MeNB send amendment to SeNB and complete message, and informing removal completes.
Wherein, MeNB also can utilize said process, completes the migration of many Data Radio Bearer simultaneously.
Embodiment two:
As shown in figure 13, UE and dominant base (i.e. MeNB) and keep dual link from base station (i.e. SeNB), moved by MeNB before B carrying wherein on SeNB and come, on MeNB and SeNB, key is KeNB1 and S-KeNB1 respectively, B is carried in the transmitting procedure on SeNB, its PDCP COUNT count value is reversed, and result in the security key change on SeNB simultaneously, has become S-KeNB2.But due to other reasons (on such as SeNB, load is excessively high), SeNB wishes B carrying (its data wireless is designated 1) on this base station again to move on MeNB.
Step S1302, SeNB send amendment to MeNB and require message, wherein carry and need the B of migration to carry configuration information.
Step S1304, MeNB, according to load bearing migration request message, generate the reconfigure command initiated to UE, wherein carry B and are carried on new configuration information on MeNB, and comprising MeNB is that B carry the Data Radio Bearer redistributed and identifies (being set to 2).Wherein MeNB needs to ensure that new radio bearer identification 2 identifies all different from the used Data Radio Bearer of MeNB and SeNB.
Step S1306, UE completes the migration of B carrying to MeNB according to the command messages of MeNB, simultaneously UE changes the mapping relations that radio bearer corresponding to B carrying carry with EPS, deletion radio bearer identification 1, and again makes the EPS bearing identification of radio bearer identification 2 and this carrying set up to map.Then UE initiates to have reshuffled message to MeNB.
Step S1308, MeNB send amendment acknowledge message to SeNB, and informing removal completes.
Further, MeNB initiatively can judge in step S1304 whether the key that B is carried on SeNB upgrades, if the key S-KeNB1 on SeNB there occurs renewal really, and the key of this locality and initial MeNB move that key K eNB1 when B is carried to SeNB is identical change, then MeNB can select not for B carries the new radio bearer identification of distribution.
Further, MeNB and SeNB also can utilize this process to complete the migration of many Data Radio Bearer simultaneously.
Embodiment three:
As shown in figure 14, UE and dominant base (i.e. MeNB) and from base station (i.e. SeNB,) keep dual link, wherein SeNB is because load or other reasons, wish to exit connection (namely deleted), and all Data Radio Bearer (its data wireless is designated 1) on SeNB base station are moved on MeNB.
Step S1402, SeNB send releasing request message to MeNB, wherein carry all Data Radio Bearer configuration informations needing migration.
Step S1404, MeNB generates the reconfigure command initiated to UE, wherein carry the new configuration information of all or part Data Radio Bearer on MeNB on SeNB, comprising MeNB is the Data Radio Bearer mark that on SeNB, all or part Data Radio Bearer is redistributed.Wherein MeNB needs to ensure that newly assigned Data Radio Bearer mark identifies all different from the used Data Radio Bearer of MeNB and SeNB.
Step S1406, UE complete the migration of Data Radio Bearer to MeNB of response according to the command messages of MeNB, and delete the wireless connections with SeNB.The radio bearer that the B of UE change simultaneously carrying is corresponding and the mapping relations that EPS carries, make newly assigned Data Radio Bearer mark set up with the corresponding EPS bearing identification carried and map.Then UE initiates to have reshuffled message to MeNB.
Step S1408, MeNB send release acknowledge message to SeNB.
Further, in step 1404, if MeNB judges currently do not had unnecessary radio bearer identification to distribute, then MeNB needs the key updating process initiating MeNB.Wherein this renewal process is identical with existing key updating process, repeats no more herein.
In sum; the embodiment of the present invention achieves following beneficial effect: adopt the technique scheme that the embodiment of the present invention provides; can ensure that the multi-link carrying for terminal provides enough safeguard protections; and can prevent from, when the service connection of terminal is carried on generation migration between base station, causing the hidden danger of secret key safety aspect.Meanwhile, existing connection management mechanism that management method described in the present invention is fully multiplexing, ensure that network and the terminal backwards compatibility on software and hardware to a certain extent.
In another embodiment, additionally provide a kind of software, this software is for performing the technical scheme described in above-described embodiment and preferred implementation.
In another embodiment, additionally provide a kind of storage medium, store above-mentioned software in this storage medium, this storage medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. an emigration processing method for dual link radio bearer, is characterized in that, comprising:
Dominant base is that Data Radio Bearer to be migrated distributes new Data Radio Bearer mark, wherein, described new Data Radio Bearer mark and described dominant base and from base station used Data Radio Bearer identify all different;
Described dominant base sends to subscriber equipment and is used for the message that notifying user equipment carries out Data Radio Bearer migration, wherein, carries described new radio bearer identification in this message.
2. method according to claim 1, is characterized in that, the evolved packet system bearing identification that described new radio bearer identification is corresponding with described Data Radio Bearer exists mapping relations.
3. method according to claim 1, is characterized in that, dominant base is that before Data Radio Bearer to be migrated distributes new Data Radio Bearer mark, described method also comprises:
Described dominant base and/or described to carry out key updating from base station time, remove the Data Radio Bearer identification record that current data radio bearer does not use.
4. according to the method in any one of claims 1 to 3, it is characterized in that, before dominant base distributes new Data Radio Bearer mark, described method also comprises:
Described Data Radio Bearer migrates to behind base station by dominant base by described dominant base, move back dominant base by from base station by described Data Radio Bearer again, and/or the key of the source base station of load bearing migration there occurs renewal and the key of the target BS of load bearing migration upgrade.
5. a moving method for dual link radio bearer, is characterized in that, comprising:
Subscriber equipment receives the message of carrying out Data Radio Bearer migration for notifying user equipment from dominant base, wherein, described message carries the new Data Radio Bearer mark that described dominant base distributes, this new Data Radio Bearer mark for identifying Data Radio Bearer to be migrated, described new Data Radio Bearer mark and described dominant base and from base station used Data Radio Bearer identify all different;
Described Data Radio Bearer is migrated to target BS according to described new Data Radio Bearer mark by described subscriber equipment.
6. method according to claim 5, is characterized in that, when described Data Radio Bearer is migrated to target BS according to described new Data Radio Bearer mark by described subscriber equipment, described method also comprises:
It is corresponding that described subscriber equipment makes described new Data Radio Bearer identify the evolved packet system bearing identification corresponding with described Data Radio Bearer, and delete the original Data Radio Bearer mark of described Data Radio Bearer.
7. a migration process device for dual link radio bearer, is applied to dominant base, it is characterized in that, comprising:
Distribution module, for distributing new Data Radio Bearer mark for Data Radio Bearer to be migrated, wherein, described new Data Radio Bearer mark and described dominant base and from base station used Data Radio Bearer identify all different;
Sending module, being used for for sending to subscriber equipment the message that notifying user equipment carries out Data Radio Bearer migration, wherein, carrying described new radio bearer identification in this message.
8. device according to claim 7, it is characterized in that, when described distribution module also exists mapping relations for the evolved packet system bearing identification corresponding with described Data Radio Bearer at described new radio bearer identification, distribute described new Data Radio Bearer mark.
9. a moving apparatus for dual link radio bearer, is characterized in that, comprising:
Receiver module, for receiving the message of carrying out Data Radio Bearer migration for notifying user equipment from dominant base, wherein, described message carries the new Data Radio Bearer mark that described dominant base distributes, this new Data Radio Bearer mark for identifying Data Radio Bearer to be migrated, described new Data Radio Bearer mark and described dominant base and described from base station used Data Radio Bearer identify all different;
Transferring module, for migrating to target BS according to described new Data Radio Bearer mark by described Data Radio Bearer.
10. device according to claim 9, is characterized in that, also comprises:
Mapping block, corresponding for making described new Data Radio Bearer identify the evolved packet system bearing identification corresponding with described Data Radio Bearer, and delete the original Data Radio Bearer mark of described Data Radio Bearer.
11. 1 kinds of base stations, is characterized in that, comprising: the migration process device of the dual link radio bearer described in claim 7 or 8.
12. 1 kinds of subscriber equipmenies, is characterized in that, comprising: the moving apparatus of the dual link radio bearer described in claim 9 or 10.
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| CN201410223153.2A CN104219722B (en) | 2014-05-23 | 2014-05-23 | Migration process, moving method and the device of dual link radio bearer |
| PCT/CN2014/087718 WO2015176462A1 (en) | 2014-05-23 | 2014-09-28 | Dual-connection radio bearer migration processing and migration methods and devices |
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| CN201410223153.2A CN104219722B (en) | 2014-05-23 | 2014-05-23 | Migration process, moving method and the device of dual link radio bearer |
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