CN110475301A

CN110475301A - Method and apparatus for UE switching

Info

Publication number: CN110475301A
Application number: CN201810445167.7A
Authority: CN
Inventors: 黄晓舸; 汤涉; 张晨璐; 郑倩
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-05-10
Filing date: 2018-05-10
Publication date: 2019-11-19
Anticipated expiration: 2038-05-10
Also published as: CN110475301B

Abstract

The application provides a kind of method and apparatus for UE switching, which comprises if can directly be connected by Xn interface between the member base stations of base station cluster, information needed for the source base station directly interacts UE switching by the Xn interface with target BS；If cannot directly be connected by Xn interface between the member base stations of base station cluster, information needed for then the source base station interacts UE switching with target BS by first interface and second interface, Xn interface of the first interface between the source base station and the cluster head base station of the base station cluster, Xn interface of the second interface between the target BS and the cluster head base station；Wherein, the base station cluster is cluster construct in advance, comprising the source base station and the target BS.This method and equipment may be implemented between different base station or are deployed in the switching of the UE between the cell under different base station.

Description

Method and apparatus for UE switching

Technical field

This application involves fields of communication technology, relate more specifically to a kind of method and apparatus for UE switching.

Background technique

In the 5th generation (5th-Generation, 5G) mobile communication system, in order to meet growing flow demand, To dense deployment small cell base station (gNB) in cellular networks.Due to the coverage area of the small cell base station of these dense deployments It is smaller, therefore, during user equipment (User Equipment, UE) is mobile, need from a small cell base station (usually Referred to as source base station) it is switched to another small cell base station (commonly referred to as target BS), this handoff procedure is commonly referred to as UE and cuts It changes.

The switching side of reduction random access (Random Access Channel-less, RACH-less) used at present Formula can only realize the UE switching between the cell being deployed under the same base station, cannot achieve between different base station or be deployed in UE switching between cell under different base station.

Summary of the invention

The embodiment of the present application provides a kind of method and apparatus for UE switching, to realize between different base station or be deployed in UE switching between cell under different base station.

In a first aspect, providing a kind of method for UE switching, it is applied to source base station, which comprises

If can directly be connected by Xn interface between the member base stations of base station cluster, the source base station directly passes through institute State information needed for Xn interface interacts UE switching with target BS；

If cannot directly be connected by Xn interface between the member base stations of base station cluster, the source base station connects by first Information needed for mouth and second interface interact UE switching with target BS, the first interface are the source base station and the base station Xn interface between the cluster head base station of cluster, Xn of the second interface between the target BS and the cluster head base station connect Mouthful；

Wherein, the base station cluster is cluster construct in advance, comprising the source base station and the target BS.

Second aspect provides a kind of method for UE switching, is applied to target BS, which comprises

If can directly be connected by Xn interface between the member base stations of base station cluster, the target BS directly passes through Information needed for the Xn interface interacts UE switching with source base station；

If cannot directly be connected by Xn interface between the member base stations of base station cluster, the target BS passes through first Information needed for interface and second interface interact UE switching with source base station, the first interface are the source base station and the base station Xn interface between the cluster head base station of cluster, Xn of the second interface between the target BS and the cluster head base station connect Mouthful；

The third aspect provides a kind of method for UE switching, applied to the cluster head base station in the cluster of base station, the method Include:

If cannot directly be connected by Xn interface between the member base stations of the base station cluster, the cluster head base station passes through Information needed for first interface receives the UE switching from source base station, is sent to target BS by second interface and comes from the source Information needed for the UE switching of base station, letter needed for receiving the UE switching from the target BS by the second interface Breath, and the required information of the UE switching from the target BS is sent to the source base station by the first interface；

Wherein, the base station cluster is cluster construct in advance, comprising the source base station and the target BS, described first Xn interface of the interface between the source base station and the cluster head base station of the base station cluster, the second interface are the target BS With the Xn interface between the cluster head base station.

Fourth aspect provides a kind of network equipment, which includes:

First interactive module, if for can directly be connected by Xn interface between the member base stations of base station cluster, institute State information needed for source base station directly interacts UE switching by the Xn interface with target BS；

Second interactive module, if for cannot directly be connected by Xn interface between the member base stations of base station cluster, institute Information needed for source base station interacts UE switching with target BS by first interface and second interface is stated, the first interface is institute The Xn interface between source base station and the cluster head base station of the base station cluster is stated, the second interface is the target BS and the cluster Xn interface between head base station；

Optionally, the to be switched UE connecting with the source base station has multiple, the network equipment further include:

Module is obtained, for obtaining the information relevant to priority ranking of the to be switched UE；

Generation module, for generating the priority of the to be switched UE according to the information relevant to priority ranking；

Switching mode determining module determines that the to be switched UE is corresponding for the priority based on the to be switched UE Switching mode；

Wherein, information needed for the UE switching, comprising: the UE switching request from the source base station, and come from institute State the response message for the UE switching request of target BS；

The switching mode is carried in the UE switching request, carried in the response message target BS according to It is the access-in resource information of the to be switched UE distribution according to the switching mode, the access-in resource information is for described to be switched UE carries out UE switching.

Optionally, if can directly be connected by Xn interface between the member base stations of the base station cluster, and the UE is cut Change the identity information that the to be switched UE is also carried in request；

The response message is by the target BS according to the UE switching request and the UE body from the cluster head base station Part authenticating result determines that the UE identification authentication result is by the cluster head base station according to from the described to be cut of the target BS The identity information for changing UE is authenticated to obtain to the to be switched UE.

Optionally, if can directly be connected by Xn interface between the member base stations of the base station cluster, and if institute Stating switching mode is low interruption time delay switching mode, then

The access-in resource information includes: pre-assigned uplink authorization, the first timing time difference and exclusive random access Lead code；

Wherein, the timing time difference of the first timing time difference between the source base station and the target BS, and it is described The first timing time difference was used to determine the timing time difference between the to be switched UE and the target BS；

The low interruption time delay switching mode include: using reduce random access RACH-less mode switch over, if Using the RACH-less mode handover failure, then switched over using non-competing Random Access.

Optionally, if cannot directly be connected by Xn interface between the member base stations of base station cluster, and UE switching is asked The identity information of the to be switched UE is also carried in asking；

The response message is by the target BS according to the UE switching request and the UE body from the cluster head base station Part authenticating result determines that the UE identification authentication result is by the cluster head base station according to from the described to be switched of the source base station The identity information of UE is authenticated to obtain to the to be switched UE.

Optionally, if cannot directly be connected by Xn interface between the member base stations of base station cluster, and if described cut Changing mode is low interruption time delay switching mode, then

The access-in resource information include: pre-assigned uplink authorization, the second timing time difference, the third timing time difference and specially The random access lead code of category；

Wherein, the timing time difference of the second timing time difference between the source base station and the cluster head base station, described The timing time difference of the three timing time differences between the target BS and the cluster head base station, and the second timing time difference and described The third timing time difference is used to determine the timing time difference between the to be switched UE and the target BS；

Optionally, the switching mode determining module, is specifically used for:

If the priority of the to be switched UE be first level, by low interruptions time delay switching mode be determined as described in Switch the corresponding switching mode of UE；

If the priority of the to be switched UE is second level, by non-competing Random Access be determined as it is described to Switch the corresponding switching mode of UE；

If the priority of the to be switched UE is third level, competition Random Access is determined as described to be cut Change the corresponding switching mode of UE；

Wherein, the first level is higher than second level, and the second level is higher than the third level, the low interruption Time delay switching mode includes: to be switched over using reduction random access RACH-less mode, if using the RACH-less Mode handover failure is then switched over using non-competing Random Access.

Optionally, the information relevant to priority ranking of the to be switched UE includes at least one of following message:

Service quality QoS demand of the to be switched UE in communication process；

The type of service of the to be switched UE；And

The Reference Signal Received Power RSRP of the target BS is obtained in the measurement report of the to be switched UE.

Optionally, the base station cluster is constructed previously according to the geographical location information of base station and the load information of base station.

5th aspect, provides a kind of network equipment, which includes:

Third interactive module, if for can directly be connected by Xn interface between the member base stations of base station cluster, institute State information needed for target BS directly interacts UE switching by the Xn interface with source base station；

4th interactive module, if for cannot directly be connected by Xn interface between the member base stations of base station cluster, institute Information needed for target BS interacts UE switching with source base station by first interface and second interface is stated, the first interface is institute The Xn interface between source base station and the cluster head base station of the base station cluster is stated, the second interface is the target BS and the cluster Xn interface between head base station；

Optionally, the to be switched UE connecting with the source base station has multiple；

Information needed for the UE switching, comprising: the UE switching request from the source base station, and come from the target The response message for the UE switching request of base station；

Wherein, carry the corresponding switching mode of the to be switched UE in the UE switching request, the switching mode by The source base station determines that the priority of the to be switched UE is by the source base station according to institute according to the priority of the to be switched UE The information sorting relevant to priority ranking information for stating to be switched UE determines；The target base is carried in the response message Stand be according to the switching mode the to be switched UE distribution access-in resource information, the access-in resource information for it is described to Switch UE and carries out UE switching.

Optionally, if can directly be connected by Xn interface between the member base stations of the base station cluster, and the UE is cut Change the identity information that the to be switched UE is also carried in request, the network equipment further include:

Authentication request sending module is directed to the to be switched UE for directly sending by Xn interface to the cluster head base station Identification authentication request, the identity information of the to be switched UE is carried in identification authentication request；

First authenticating result receiving module reflects for directly passing through Xn interface from the UE identity of the cluster head base station Power is as a result, body of the UE identification authentication result by the cluster head base station according to the to be switched UE from the target BS Part information is authenticated to obtain to the to be switched UE；

Wherein, the response message is by the target BS according to the UE switching request and from the cluster head base station UE identification authentication result determines.

Optionally, if cannot directly be connected by Xn interface between the member base stations of the base station cluster, and the UE is cut Change the identity information that the to be switched UE is also carried in request, the network equipment further include:

Second authenticating result receiving module, for receiving the UE identity from the cluster head base station by the second interface Authenticating result, body of the UE identification authentication result by the cluster head base station according to the to be switched UE from the source base station Part information is authenticated to obtain to the to be switched UE；

Optionally, if cannot directly be connected by Xn interface between the member base stations of the base station cluster, and if it is described Target switching mode is low interruption time delay switching mode, then

The low interruption time delay switching mode includes: first to be switched over using reduction random access RACH-less mode, such as Fruit uses the RACH-less mode handover failure, then is switched over using non-competing Random Access.

Optionally, if the priority of the to be switched UE is first level, the corresponding switching side the to be switched UE Formula is low interruption time delay switching mode；

If the priority of the to be switched UE is second level, the corresponding switching mode of the to be switched UE is non-competing Strive Random Access；

If the priority of the to be switched UE is third level, the corresponding switching mode of the to be switched UE is competition Random Access；

Service quality QoS demand of the to be switched UE in communication process；

The type of service of the to be switched UE；And

6th aspect, provides a kind of network equipment, which includes:

5th interactive module, if for cannot directly be connected by Xn interface between the member base stations of the base station cluster, Information needed for then the cluster head base station receives the UE switching from source base station by first interface, by second interface to target Information needed for base station sends the UE switching from the source base station, is received by the second interface and comes from the target BS UE switching needed for information, and by the first interface to the source base station send the UE from the target BS cut Change required information；

Optionally, the network equipment further include:

Preserving module, for saving the UE information in the base station cluster, the UE information is used to identify the body of to be switched UE Part.

Optionally, the network equipment further include:

Authentication information obtains module, for obtaining the identity information of the to be switched UE；

Authentication module, for according to the to be switched UE identity information and the cluster head base station in the UE information that saves, Determine the UE identification authentication result for being directed to the to be switched UE；

Authenticating result sending module, for sending the UE identification authentication result to the target BS；

Wherein, the UE identification authentication result determines that the response for the to be switched UE is believed for the target BS Breath, it is described to be switched that the target BS is carried in the response message according to the corresponding switching mode of the to be switched UE The access-in resource information of UE distribution, the access-in resource information carry out UE switching, the to be switched UE for the to be switched UE Priority of the corresponding switching mode by the source base station according to the to be switched UE determines, the priority of the to be switched UE by The source base station is determined according to the information sorting relevant to priority ranking information of the to be switched UE.

Optionally, it can directly be connected by Xn interface between the member base stations of the base station cluster, the authentication information obtains Modulus block, is specifically used for:

It is directly requested by Xn interface from the identification authentication for the to be switched UE of the target BS, institute State the identity information that the to be switched UE is carried in identification authentication request.

Optionally, it can directly be connected by Xn interface between the member base stations of the base station cluster, and if described to be cut Changing the corresponding switching mode of UE is low interruption time delay switching mode, then

Optionally, it cannot directly be connected by Xn interface between the member base stations of the base station cluster, the authentication information obtains Modulus block, is specifically used for:

The UE switching request for the to be switched UE from the source base station is received by the first interface, it is described The identity information of the to be switched UE is carried in UE switching request.

Optionally, it cannot directly be connected by Xn interface between the member base stations of the base station cluster, and if described to be cut Changing the corresponding switching mode of UE is low interruption time delay switching mode, then

Service quality QoS demand of the to be switched UE in communication process；

The type of service of the to be switched UE；And

Optionally, further includes:

Adding module, if being the to be switched UE for the identification authentication result is not UE in the base station cluster, The to be switched UE is then added to the base station cluster, and the identity information of the to be switched UE is saved.

7th aspect, provides a kind of network equipment, which includes memory, processor and be stored in described deposit On reservoir and the radio communication program that can run on the processor, when the radio communication program is executed by the processor The step of realizing the method as described in first aspect to third aspect either side.

Eighth aspect provides a kind of computer-readable medium, wireless communication is stored on the computer-readable medium Program realizes the method as described in first aspect to the third aspect either side when radio communication program is executed by processor The step of.

In the embodiment of the present application, by constructing the base station cluster comprising source base station and target BS in advance, so that being under the jurisdiction of Source base station and target BS in the cluster of base station can directly pass through Xn interface connection communication, or pass through source base station and cluster head base station Between Xn interface and target BS and cluster head base station between Xn interface connection communication, thus realize between different base station or The interaction of information needed for UE switching between the cell disposed under different base station, and then realize between different base station or be deployed in UE switching between cell under different base station.

Detailed description of the invention

In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The some embodiments recorded in application, for those of ordinary skill in the art, in the premise of not making the creative labor property Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is cellular network architecture schematic diagram according to an embodiment of the present invention.

Fig. 2 is a kind of a kind of schematic flow chart of method for UE switching according to an embodiment of the present invention.

Fig. 3 is a kind of another schematic flow chart of method for UE switching according to an embodiment of the present invention.

Fig. 4 is a kind of schematic flow chart of another method for UE switching according to an embodiment of the present invention.

Fig. 5 is another schematic flow chart of another method for UE switching according to an embodiment of the present invention.

Fig. 6 is another schematic flow chart of another method for UE switching according to an embodiment of the present invention.

Fig. 7 be it is according to an embodiment of the present invention another for UE switching method a kind of schematic flow chart.

Fig. 8 be it is according to an embodiment of the present invention another for UE switching method another schematic flow chart.

Fig. 9 is a kind of detailed flow diagram of the method according to an embodiment of the present invention for UE switching.

Figure 10 is the detailed flow diagram of another kind of the method according to an embodiment of the present invention for UE switching.

Figure 11 is a kind of structural schematic diagram of the network equipment 1100 according to an embodiment of the present invention.

Figure 12 is another structural schematic diagram of the network equipment 1100 according to an embodiment of the present invention.

Figure 13 is a kind of structural schematic diagram of the network equipment 1300 according to an embodiment of the present invention.

Figure 14 is another structural schematic diagram of the network equipment 1300 according to an embodiment of the present invention.

Figure 15 is another structural schematic diagram of the network equipment 1300 according to an embodiment of the present invention.

Figure 16 is a kind of structural schematic diagram of the network equipment 1600 according to an embodiment of the present invention.

Figure 17 is another structural schematic diagram of the network equipment 1600 according to an embodiment of the present invention.

Figure 18 is the structural schematic diagram of the network equipment 1000 according to an embodiment of the present invention.

Specific embodiment

In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common The application protection all should belong in technical staff's every other embodiment obtained without making creative work Range.

It should be understood that the technical solution of the embodiment of the present application can be applied to various communication systems, and such as: global system for mobile telecommunications (Global System of Mobile communication, GSM) system, CDMA (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) it system, General Packet Radio Service (General Packet Radio Service, GPRS), drills for a long time Into (Long Term Evolution, LTE) system, LTE frequency division duplex (Frequency Division Duplex, FDD) system System, LTE time division duplex (Time Division Duplex, TDD), Universal Mobile Communication System (Universal Mobile Telecommunication System, UMTS) or global interconnection inserting of microwave (Worldwide Interoperability For Microwave Access, WiMAX) communication system, 5G system, wireless (New Radio, NR) system new in other words.

Terminal device (User Equipment, UE), also referred to as mobile terminal (Mobile Terminal), movement Terminal device etc., can through wireless access network (for example, Radio Access Network, RAN) and at least one core net into Row communication, terminal device can be mobile terminal, such as mobile phone (or being " honeycomb " phone) and the meter with mobile terminal Calculation machine, for example, it may be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they and nothing Line access exchanges language and/or data.

The network equipment be it is a kind of be deployed in wireless access network set in for as terminal device providing the device of UE handoff functionality, The network equipment can be base station, and the base station can be base station (the Base Transceiver in GSM or CDMA Station, BTS), it is also possible to the base station (NodeB) in WCDMA, can also be the evolved base station in LTE (evolutional Node B, eNB or e-NodeB) and the base station 5G (gNB).

It should be noted that the size of the serial number of each process is not meant to execute sequence when describing specific embodiment It is successive, the execution of each process sequence should be determined by its function and internal logic, the implementation without coping with the embodiment of the present application Journey constitutes any restriction.

The technical solution that each embodiment that the invention will now be described in detail with reference to the accompanying drawings provides.

First of all for inventive concept of the invention is more clearly understood that, first Fig. 1 is combined to provide the embodiment of the present invention below Be respectively illustrated for the method and the network architecture relied on of the network equipment of UE switching.

Referring to FIG. 1, wireless access network (Radio Access Network, RAN) includes several small cell base stations and UE, Core net (Next Generation Core, NGC) includes travelling performance management function (Access and Mobility Management Function, AMF) server, conversation management functional (Session Management Function, SMF) Server and user plane functions (User plane Function, UPF) server.

As shown in Figure 1, in embodiments of the present invention, it can be previously according to the geographical location information of small cell base station (or base station) With the load information of small cell base station (or base station), neighbouring small cell base station (or base station) is divided to a base station cluster (cluster), entire cellular network is divided into different size of base station cluster, first base station cluster 11, the second base of example as shown in figure 1 It stands cluster 12 and third base station cluster 13.Any base station in each base station cluster can serve as the cluster head base station (cluster of the base station cluster Head gNB), 121 and the third base station cluster 13 in the 111, second base station cluster 12 in the first base station cluster 11 of example as shown in figure 1 In 131, they can serve as the cluster head base station of first base station cluster 11, the second base station cluster 12 and third base station cluster 13, In respectively Base station in each base station cluster in addition to cluster head base station can be referred to as member base stations.Cluster head base station in each base station cluster can be protected The identity information of UE in the information of UE in cluster, especially cluster is deposited, and as UE is added or leaves the information of UE in update cluster.At this In inventive embodiments, cluster head base station can also assist UE to switch, specific that handoff procedure is assisted to will be described herein-after for UE It is described in detail in the method for switching.

As shown in Figure 1, in embodiments of the present invention, can directly pass through Xn interface between the member base stations in each base station cluster It connects (Xn interface communication can be passed through), can also directly cannot be connected by Xn interface, but member base stations can directly pass through Xn interface is connect with cluster head base station.Each base station cluster of the side RAN can be connect by NG interface with NGC.

On this basis, it is situated between below with reference to Fig. 2 and Fig. 3 to a kind of method for UE switching for being applied to source base station It continues.

In one embodiment, as shown in Fig. 2, be applied to source base station it is a kind of for UE switching method may include as Lower step:

Step 201, if can directly be connected by Xn interface between the member base stations of base station cluster, the source base station is straight Connected information needed for the Xn interface interacts UE switching with target BS.

Xn interface is the network interface for supporting to interconnect between two base stations (gNB), supports the direct biography of data and signaling It is defeated, similar to the X2 interface in LTE.

If cannot directly be connected by Xn interface between the member base stations of step 202, base station cluster, the source base station is logical Cross information needed for first interface and second interface interact UE switching with target BS.

In step 202, Xn of the first interface between the source base station and the cluster head base station of the base station cluster connects Mouthful, Xn interface of the second interface between the target BS and the cluster head base station.

Base station cluster is cluster construct in advance, comprising the source base station and the target BS.Foundation about base station cluster Referring to Figure 1 and above to the explanation of Fig. 1.

Information needed for UE switching, including but not limited to: the UE switching request from the source base station, and from described The response message, etc. for the UE switching request of target BS.

It should be noted that in handover execution stage, (UE handoff procedure is generally divided into switching and prepares, switches execution and cut Change and complete three phases), UE switch actually required information can be it is being configured by source base station based on above-mentioned response message including The information of access-in resource, such as source base station utilize wireless heterogeneous networks after receiving the response message from target BS The information of (Radio Resource Control, RRC) configuration.

A kind of method for UE switching provided in an embodiment of the present invention, by being constructed in advance comprising source base station and target base The base station cluster stood allows the source base station being under the jurisdiction of in the cluster of base station and target BS directly by Xn interface connection communication, or Person passes through the Xn interface between source base station and cluster head base station and the Xn interface connection communication between target BS and cluster head base station, The interaction of information needed for UE switching between cell to realize between different base station or be disposed under different base station, Jin Ershi Show the UE switching between different base station or between the cell being deployed under different base station.

Due in some cases, for source base station, the to be switched UE being attached thereto may have it is multiple, for example, In In the operational process of high-speed rail, the passenger for having batch needs to switch to a target BS from a source base station group simultaneously, and this is multiple In to be switched UE, some to be switched UE may be to more demanding, some to be switched UE of handoff time delay and handover success rate It may be to the requirement of handoff time delay and handover success rate without so high.Therefore, as shown in figure 3, in another embodiment In, applied to a kind of method for UE switching of source base station, can also include:

Step 203, the information relevant to priority ranking for obtaining the to be switched UE.

As an example, the information relevant to priority ranking of to be switched UE may include in following message at least It is a kind of:

Service quality (Quality of Service, the QoS) demand of the to be switched UE in communication process；

The type of service of the to be switched UE；And

Reference Signal Received Power (the Reference of the target BS is obtained in the measurement report of the to be switched UE Signal Receiving Power, RSRP).

Wherein, the type of service of to be switched UE can be source base station to target BS send UE switching request when, this is to be cut Change occurent type of service on UE, these types of service for example can be voice communication type, video telephony type or Short message types, etc..

Step 204, the information relevant to priority ranking according to, generate the priority of the to be switched UE.

For example, the type of service of higher, the to be switched UE of requirement of the to be switched UE to QoS is more important (for example, to user For, voice communication may this type of service be more important than short message) and to be switched UE RSRP is required it is higher, should be to The higher grade for switching UE.

Step 205, the priority based on the to be switched UE determine the corresponding switching mode of the to be switched UE.

Under normal conditions, the priority of a to be switched UE is higher, for cutting for the to be switched UE switching mode determined Throw-over degree is faster and/or handover success rate is also higher.

Due in RACH-less switching mode, non-competing Random Access and competition these three sides of Random Access In formula, their switch speed successively successively decreases, and the rate that is successfully accessed of non-competing Random Access is greater than competition random access Mode is successfully accessed rate, and therefore, in one example, above-mentioned steps 205 can specifically include:

If the priority of the to be switched UE is third level, competition Random Access is determined as described to be cut Change the corresponding switching mode of UE.

Wherein, the first level is higher than second level, and the second level is higher than the third level, the low interruption Time delay switching mode includes: to be switched over using reduction random access RACH-less mode, if using the RACH-less Mode handover failure is then switched over using non-competing Random Access.In order to make it easy to understand, the low interruption time delay switching Mode can also referred to as " the non-competing random access of RACH-less+ ".

It can be appreciated that by being ranked up determining priority to be switched UE, and to be switched UE pairs is determined according to priority The switching mode answered, it is ensured that the high to be switched UE of priority has lesser handoff time delay and higher handover success Rate, to improve user experience.

It should also be noted that, UE can be obtained and target base when realizing that UE switches using RACH-less switching mode The timing time difference (timing adjustment indication) stood and pre-assigned uplink authorization (preallocated Uplink grant) the two key messages be successful switch premise；If the two key messages cannot be obtained, UE will It can not be communicated with target BS, and then can not achieve UE switching.

In embodiments of the present invention, since source base station and target BS being divided in the same base station cluster in advance, and should The cluster head base station of base station cluster can manage member base stations therein, and (member base stations can directly be connected by Xn interface with cluster head base station Connect), therefore, target BS can directly be communicated with source base station by Xn interface, transmit the two key messages to source base station；Or Person's target BS can be communicated by above-mentioned first interface and second interface with source base station, transmit the two key letters to source base station Breath, then the two key messages are allocated to be switched UE by source base station, and then the realization of RACH-less switching mode can be used UE switching between different base station or between the cell that is deployed under different base station.

In addition, UE handoff procedure is generally divided into handoff preparation phase, switching executes and three phases are completed in switching, due to When switching over using RACH-less switching mode, the same of to be switched UE and target BS in handover execution stage can be saved The step of rapid and target BS is to be switched UE distribution uplink step by step, therefore, in one embodiment of the invention, if Using RACH-less switching mode, the interruption time delay in UE handoff procedure can be reduced, this is also that above-mentioned " RACH-less+ is non- The reason of competition random access " is referred to as low interruption time delay switching mode.

Further more, the rate that is successfully accessed due to non-competing Random Access is higher than being successfully accessed for competition Random Access Rate, therefore, the to be switched UE of (such as first level or second level above) higher for priority, when selecting low interruption Prolong switching mode or non-competing access switching mode, competes random access switching mode compared to selecting, priority can be improved The handover success rate of high to be switched UE.

On the basis of embodiment shown in Fig. 3, in more detail, it can be carried in the UE switching request from source base station The corresponding switching mode of to be switched UE can carry target BS according to the switching in the response message from target BS Mode is the access-in resource information of the to be switched UE distribution, and the access-in resource information carries out UE for the to be switched UE and cuts It changes.Can hereinafter situation be divided for example, access-in resource information particular content.

In the first instance, it is assumed that it can directly be connected by Xn interface between the member base stations of the base station cluster, and The identity information of the to be switched UE is also carried in the UE switching request；Then the response message can be by the target base It stands according to the UE switching request and the UE identification authentication result from the cluster head base station determines, the UE identification authentication result Identity information by the cluster head base station according to the to be switched UE from the target BS carries out the to be switched UE Authentication obtains.

The identity information of UE can include but is not limited to following message: source base station ID, source base station cell-radio network face When mark (Cell Radio Network Temporary Identifier, C-RNTI), etc..

Correspondingly, the information of the UE saved in cluster head base station may include: UE X2 signaling of the to be switched UE at source base station Packet-based core networks (Evolved Packet Core, EPC) signaling context reference, to be switched of context reference, to be switched UE The RRC context of C-RNTI of the UE in source base station, evolution radio access bearer (Evolved Radio Access Bearer, E-RAB) context, the ID of source base station, the ID of target BS, source base station Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Cell Radio Network Temporary Identifier, C-RNTI), the C-RNTI of target BS and radio-network layer (Radio Network Layer, RNL) and transport network layer (Transport Network Layer, TNL) addressing information, etc. Deng being not listed one by one herein.

More specifically, the response message may is that target BS according to the UE identification authentication from cluster head base station When as a result determining that the to be switched UE is the UE in the base station cluster, then determined according to the UE switching request from source base station, and It is mainly that the to be switched UE distributes access-in resource according to the corresponding switching mode of the to be switched UE is carried in UE switching request Information.It should be noted that if target BS determines the to be switched UE according to the UE identification authentication result from cluster head base station It is not that mode in the UE in the base station cluster, then adoption of existing standard or agreement determines the response message.

It can be appreciated that whether being that UE identifies in the cluster of base station, and is determining that switching UE is the base station to be switched UE In cluster when UE, then foundation UE switching request determines response message, using the side provided in an embodiment of the present invention for being used to switch UE Method realizes the switching of to be switched UE, rather than realizes the switching of to be switched UE using existing switching flow, therefore can be improved The switching rate and handover success rate of UE in the cluster of base station.

Further, described if the switching mode is low interruption time delay switching mode in first example When access-in resource information may include: pre-assigned uplink authorization (preallocated uplink grant), the first timing Poor T₁With exclusive random access lead code (dedicated RACH preamble).

Wherein, the first timing time difference T₁Between the source base station and the target BS the timing time difference (or Referred to as timing advance (Timing Advance, TA)), and the first timing time difference T₁For determining the to be switched UE and institute State the timing time difference (timing adjustment indication) between target BS.And pre-assigned uplink authorization With the first timing time difference T₁To use RACH-less mode used access-in resource information, exclusive random access when switching Lead code is used access-in resource when using non-competing Random Access after using RACH-less mode handover failure Information.

In second example, if cannot directly be connected by Xn interface between the member base stations of base station cluster, and described The identity information of the to be switched UE is also carried in UE switching request；Then the response message is by the target BS according to institute It states UE switching request and the UE identification authentication result from the cluster head base station determines that the UE identification authentication result is by the cluster Head base station is authenticated to obtain according to the identity information of the to be switched UE from the source base station to the to be switched UE.

Likewise, the response message may is that target BS according to the UE identification authentication result from cluster head base station When determining that the to be switched UE is the UE in the base station cluster, then determined according to the UE switching request from source base station, and it is main It is to carry the corresponding switching mode of the to be switched UE in foundation UE switching request to distribute access-in resource information for the to be switched UE. It should be noted that if target BS determines that the to be switched UE is not this according to the UE identification authentication result from cluster head base station UE in the cluster of base station, then the mode in adoption of existing standard or agreement determines the response message.

It also, whether is that UE identifies in the cluster of base station, and is determining that switching UE is in the base station cluster to be switched UE When UE, then foundation UE switching request determines response message, with real using the method provided in an embodiment of the present invention for switching UE The switching of existing to be switched UE, rather than the switching of to be switched UE is realized using existing switching flow, therefore base station can be improved The switching rate and handover success rate of UE in cluster.

Further, described if the switching mode is low interruption time delay switching mode in second example When access-in resource information may include: pre-assigned uplink authorization (preallocated uplink grant), the second timing Poor T₂, third timing time difference T₃With exclusive random access lead code.

Wherein, the second timing time difference T₂It is described for the timing time difference between the source base station and the cluster head base station Third timing time difference T₃For the timing time difference between the target BS and the cluster head base station, and the second timing time difference T₂ With the third timing time difference T₃For determining the timing time difference (timing between the to be switched UE and the target BS adjustment indication).And pre-assigned uplink authorization, the second timing time difference T₂With the third timing time difference T₃For the access-in resource information for using RACH-less mode used when switching, exclusive random access lead code is to use After RACH-less mode handover failure, used access-in resource information when using non-competing Random Access.

In above-mentioned first example and second example, the low meaning for interrupting time delay switching mode is please referred to above, this Place repeats no more.And based on analysis above it is found that can be reduced in UE handoff procedure using low interruption time delay switching mode Interruption time delay.

It needs to illustrate again, in Fig. 2 and embodiment shown in Fig. 3, the base station cluster is previously according to base station What geographical location information and the load information of base station constructed.

A kind of side for UE switching provided in an embodiment of the present invention in conjunction with attached drawing 2 and 3 pair above, applied to source base station Method is illustrated.4 to attached drawing 6 with reference to the accompanying drawing, to a kind of use provided in an embodiment of the present invention, applied to target BS It is illustrated in the method for UE switching.

Referring to FIG. 4, in one embodiment, a kind of method for UE switching applied to target BS may include Following steps:

If can directly be connected by Xn interface between the member base stations of step 401, base station cluster, the target BS Information needed for directly interacting UE switching with source base station by the Xn interface.

If cannot directly be connected by Xn interface between the member base stations of step 402, base station cluster, the target BS Information needed for interacting UE switching with source base station by first interface and second interface.

In step 402, Xn of the first interface between the source base station and the cluster head base station of the base station cluster connects Mouthful, Xn interface of the second interface between the target BS and the cluster head base station.

Optionally, the corresponding switching mode of the to be switched UE can be carried in the UE switching request from source base station, The corresponding switching mode of to be switched UE can determine by the source base station according to the priority of the to be switched UE, and described to be cut The priority for changing UE can information sorting relevant to priority ranking information by the source base station according to the to be switched UE It determines；Access of the target BS according to the switching mode for the to be switched UE distribution is carried in the response message Resource information, the access-in resource information carry out UE switching for the to be switched UE.Situation can be hereafter divided to illustrate access The content that resource information includes.

Due in some cases, for source base station, the to be switched UE being attached thereto may have it is multiple, for example, In In the operational process of high-speed rail, the passenger for having batch needs to switch to a target BS from a source base station group simultaneously, and this is multiple In to be switched UE, some to be switched UE may be to more demanding, some to be switched UE of handoff time delay and handover success rate It may be to the requirement of handoff time delay and handover success rate without so high.Therefore, by being ranked up really to be switched UE Determine priority, and determine the corresponding switching mode of to be switched UE according to priority, it is ensured that the high to be switched UE tool of priority There are lesser handoff time delay and higher handover success rate, to improve user experience.

In one example, the information relevant to priority ranking of to be switched UE may include in following message at least It is a kind of:

The type of service of the to be switched UE；And

Due in RACH-less switching mode, non-competing Random Access and competition these three sides of Random Access In formula, their switch speed successively successively decreases, and the rate that is successfully accessed of non-competing Random Access is greater than competition random access Mode is successfully accessed rate, therefore, as an example, cuts there may be the priority of to be switched UE is corresponding with to be switched UE Change the following corresponding relationship of mode:

If the priority of the to be switched UE is first level, the corresponding switching mode of the to be switched UE is in low Disconnected time delay switching mode.

If the priority of the to be switched UE is second level, the corresponding switching mode of the to be switched UE is non-competing Strive Random Access.

If the priority of the to be switched UE is third level, the corresponding switching mode of the to be switched UE is competition Random Access.

Wherein, the first level is higher than second level, and the second level is higher than the third level, the low interruption Time delay switching mode is " the non-competing random access of RACH-less+ " above addressed.

It should be noted that UE can be obtained and target BS when realizing that UE switches using RACH-less switching mode The timing time difference (timing adjustment indication) and pre-assigned uplink authorization (preallocated Uplink grant) the two key messages be successful switch premise；If the two key messages cannot be obtained, UE will It can not be communicated with target BS, and then can not achieve UE switching.

In the first instance, as shown in figure 5, if can directly be connect by Xn between the member base stations of the base station cluster Mouth connection, and the identity information of the to be switched UE is also carried in the UE switching request, then it is applied to the one of target BS Kind is used for the method that UE switches, and can also include:

Step 403, directly by Xn interface to the cluster head base station send be directed to the to be switched UE identification authentication ask It asks.

Wherein, the identity information of the to be switched UE is carried in the identification authentication request.

Step 404 directly passes through UE identification authentication result of the Xn interface from the cluster head base station.

Wherein, the UE identification authentication result is by the cluster head base station according to from the described to be switched of the target BS The identity information of UE is authenticated to obtain to the to be switched UE.

On this basis, the response message can be by the target BS according to the UE switching request and from described The UE identification authentication result of cluster head base station determines.

Further, described if the switching mode is low interruption time delay switching mode in first example Access-in resource information may include: pre-assigned uplink authorization, the first timing time difference and exclusive random access lead code.

Wherein, the timing time difference of the first timing time difference between the source base station and the target BS, and it is described The first timing time difference was used to determine the timing time difference between the to be switched UE and the target BS.And it is pre-assigned on Row authorization and the first timing time difference T₁For the access-in resource information for using RACH-less mode used when switching, it is exclusive with Machine access lead code be using after RACH-less mode handover failure, it is used when using non-competing Random Access to connect Enter resource information.

In second example, as shown in fig. 6, cannot directly be connected by Xn interface between the member base stations of the base station cluster It connects, and also carries the identity information of the to be switched UE in the UE switching request, be then applied to a kind of use of target BS In the method for UE switching, can also include:

Step 405 receives the UE identification authentication result from the cluster head base station by the second interface.

Body of the UE identification authentication result by the cluster head base station according to the to be switched UE from the source base station Part information is authenticated to obtain to the to be switched UE；

Further, in second example shown in Fig. 6, if the target switching mode is the switching of low interruption time delay Mode, then the access-in resource information may include: pre-assigned uplink authorization (preallocated uplink Grant), the second timing time difference T₂, third timing time difference T₃With exclusive random access lead code.

It should be noted that the base station cluster is the geography previously according to base station in the embodiment shown in fig. 4 to fig. 6 What location information and the load information of base station constructed.

Above in conjunction with 4 to 6 pairs of attached drawing it is provided in an embodiment of the present invention, applied to target BS it is a kind of for UE switch Method is illustrated.7 to attached drawing 8 with reference to the accompanying drawing, to one kind provided in an embodiment of the present invention, applied to cluster head base station Method for UE switching is illustrated.

As shown in fig. 7, in one embodiment, applied to a kind of method for UE switching of cluster head base station, can wrap It includes:

If cannot directly be connected by Xn interface between the member base stations of step 701, the base station cluster, the cluster head Information needed for base station receives the UE switching from source base station by first interface, is sent by second interface to target BS Information needed for UE switching from the source base station receives the UE from the target BS by the second interface and switches institute The information needed, and the required letter of the UE switching from the target BS is sent to the source base station by the first interface Breath.

Wherein, the base station cluster is cluster construct in advance, comprising the source base station and the target BS, described first Xn interface of the interface between the source base station and the cluster head base station of the base station cluster, the second interface are the target BS With the Xn interface between the cluster head base station.Foundation about base station cluster is referring to Figure 1 and above to the explanation of Fig. 1.

A kind of method for UE switching applied to cluster head base station provided in an embodiment of the present invention, by constructing packet in advance Base station cluster containing source base station and target BS, allows the source base station being under the jurisdiction of in the cluster of base station and target BS directly to pass through Xn Interface connection communication, or by between Xn interface between source base station and cluster head base station and target BS and cluster head base station Xn interface connection communication, thus realize between different base station or the cell disposed under different base station between UE switching needed for letter The interaction of breath, and then realize the UE switching between different base station or between the cell being deployed under different base station.

Referring to FIG. 8, in another embodiment, a kind of method for UE switching applied to cluster head base station can be with Include:

UE information in step 702, the preservation base station cluster.

Wherein, the UE information is used to identify the identity of to be switched UE, specifically for combining the identity information of to be switched UE Identify whether the to be switched UE is UE in base station cluster where cluster head base station, source base station and target BS.

As it was noted above, the UE information in the base station cluster that cluster head base station saves can include but is not limited to: to be switched UE exists The EPC signaling context reference of UE X2 signaling context reference, to be switched UE at source base station, to be switched UE are in source base station C-RNTI RRC context, E-RAB context, the ID of source base station, the ID of target BS, the C-RNTI of source base station, target base C-RNTI and RNL and TNL addressing information for standing, etc., are not listed one by one herein.

Optionally, with continued reference to Fig. 8 it is found that In yet another embodiment, one kind applied to cluster head base station is cut for UE The method changed can also include:

Step 703, the identity information for obtaining the to be switched UE.

As it was noted above, the identity information of UE, can include but is not limited to following message: the C- of source base station ID, source base station RNTI, etc..

In the first instance, if can directly be connected by Xn interface between the member base stations of the base station cluster, Step 703 can specifically include: directly pass through body for the to be switched UE of the Xn interface from the target BS Part authentication request carries the identity information of the to be switched UE in the identification authentication request.

In second example, if cannot directly be connected by Xn interface between the member base stations of the base station cluster, Step 703 can specifically include: receive the UE for the to be switched UE from the source base station by the first interface Switching request carries the identity information of the to be switched UE in the UE switching request.

The UE information saved in step 704, the identity information according to the to be switched UE and the cluster head base station, determines needle To the UE identification authentication result of the to be switched UE.

Step 705, Xiang Suoshu target BS send the UE identification authentication result.

Wherein, the UE identification authentication result determines that the response for the to be switched UE is believed for the target BS Breath.

It is described that the target BS is carried in the response message according to the corresponding switching mode of the to be switched UE The access-in resource information of to be switched UE distribution, the access-in resource information carry out UE switching for the to be switched UE, it is described to Priority of the corresponding switching mode of switching UE by the source base station according to the to be switched UE determines that the to be switched UE's is excellent To priority ranking information relevant information sorting of the first grade by the source base station according to the to be switched UE determines.Can hereafter it divide The particular content of situation illustration access-in resource information.

As an example, the information relevant to priority ranking of the to be switched UE include in following message at least It is a kind of:

Service quality QoS demand of the to be switched UE in communication process；

The type of service of the to be switched UE；And

Under normal conditions, the priority of a to be switched UE is higher, for cutting for the to be switched UE switching mode determined Throw-over degree is faster, handover success rate is also higher.

Further, in step 703 for first example on the basis of, cut if the to be switched UE is corresponding Changing mode is low interruption time delay switching mode, then the access-in resource information includes: pre-assigned uplink authorization (preallocated uplink grant), the first timing time difference T1 and exclusive random access lead code.

Wherein, the first timing time difference T₁The timing time difference between the source base station and the target BS, and institute State the first timing time difference T₁For determining the timing time difference (timing between the to be switched UE and the target BS adjustment indication).And pre-assigned uplink authorization and the first timing time difference T₁To use the side RACH-less Formula access-in resource information used when switching, exclusive random access lead code are using RACH-less mode handover failure Used access-in resource information when afterwards, using non-competing Random Access.

In step 703 for second example on the basis of, if the corresponding switching mode of the to be switched UE is Low interruption time delay switching mode, then the access-in resource information includes: pre-assigned uplink authorization (preallocated Uplink grant), the second timing time difference T₂, third timing time difference T₃With exclusive random access lead code.

Optionally, in Fig. 7 into embodiment shown in Fig. 8, the base station cluster is the geographical location letter previously according to base station What breath and the load information of base station constructed.

Optionally, a kind of method for UE switching provided in an embodiment of the present invention applied to cluster head base station, can be with If including: the identification authentication result be the to be switched UE is not UE in the base station cluster, by the to be switched UE Be added to the base station cluster, and the identity information of the to be switched UE saved, with to the UE information in the base station cluster into Row updates.

Combine Fig. 7 and 8 that the method for UE switching applied to cluster head base station is described in detail above.Below in conjunction with figure 9 and Figure 10 introduces a kind of method for UE switching provided by the embodiments of the present application using two more detailed embodiments.

Referring to FIG. 9, in one embodiment, it is assumed that can directly be connected by Xn interface between the member base stations of base station cluster It connects, then exists as follows between to be switched UE, source base station, target BS, cluster head base station, AMF server and UPF server Interactive process:

In handoff preparation phase 81:

Step 801, source base station configure measurement process to be switched UE.

Measurement report is reported to source base station by step 802, to be switched UE.

Step 803, source base station are based on measurement report and make UE switching decision, determine that be switched UE's is preferential by sequence Grade, and the priority by determining determine switching mode corresponding with to be switched UE.

Step 804, source base station send UE switching request to target BS, carry to be switched UE pairs in the UE switching request The identity information of the switching mode, to be switched UE answered is (according to measurement report and wireless resource management (Radio Resource Management, RRM) information determination) and other information.

Step 805, target BS send the request of UE identification authentication to cluster head base station, carry in UE identification authentication request The identity information of to be switched UE.

The identity information and cluster head of step 806, cluster head base station according to the to be switched UE carried in the request of UE identification authentication The UE information in the cluster of base station where the cluster head base station saved in base station, obtain UE identification authentication result (to be switched UE whether be UE in the base station cluster), when determining the to be switched UE is not the UE in the base station cluster, save the identity information of the to be switched UE； And the UE identification authentication result is fed back to target BS in cluster head base station.

Step 807, target BS are based on the UE when determining that be switched UE is UE in cluster according to UE identification authentication result The corresponding switching mode of to be switched UE carried in switching request configures access-in resource to be switched UE, and generates for reception The response message of the UE switching request arrived includes access-in resource information in the response message.Wherein, the access-in resource of distribution is for example It may is that dedicated resources and exclusive random access lead code.

Step 808, target BS send the response message to source base station.When the corresponding switching mode of to be switched UE is low When interrupting time delay switching mode, includes the exclusive random access lead code distributed in step 807 in response message, divides in advance The uplink authorization (preallocated uplink grant) and first time poor T matched₁, the first time poor T₁Can be used for It is poor (timing adjustment indication) that switching UE calculates the timing between to be switched UE and target BS, this Timing is poor with poor T at the first time₁With the distance dependent of to be switched UE to target BS.

In handover execution stage 82:

Step 809, source base station reconfigure access-in resource to be switched UE by RRC information, for example, being reconfigured to be switched UE Set pre-assigned uplink authorization (preallocated uplink grant) and poor (the timing adjustment of timing Indication) the two key messages.

Sequence number (Serial Number, SN) is submitted to target BS by step 810, source base station.

Step 811, to be switched UE and target BS synchronize.

Specifically, when the corresponding switching mode of to be switched UE determined in step 803 is that " RACH-less+ is non-competing When random access ", to be switched UE uses RACH-less process synchronous with target BS first, obtains key simultaneously from target BS Allocating security algorithm；Fail according to RACH-less Process Synchronization, then using the random access preamble reconfigured in step 809 Code is synchronized using non-competing random access procedure with target BS.

When the corresponding switching mode of to be switched UE determined in step 803 is non-competing random access, to be switched UE It is synchronized using non-competing random access procedure with target BS using the random access lead code reconfigured in step 809.

When the corresponding switching mode of to be switched UE determined in step 803 is competition random access, to be switched UE makes It is synchronized using competition random access procedure with target BS with the random access lead code reconfigured in step 809.

Step 812, target BS distribute uplink grant to be switched UE.

It should be noted that when the corresponding switching mode of to be switched UE determined in step 803 is that " RACH-less+ is non- Compete random access " when, step 811 in fact can be saved to step 813, can reduce the interruption in UE handoff procedure in this way Time delay.

In the switching completion stage 83:

Step 813, to be switched UE are reconfigured to target BS transmission RRC completes information.

Step 814, target BS give AMF transmitting path conversion request information, to trigger core net (for example, 5G core net (5th Generation Core, 5GC)) downlink authorized transmissions are established into NG-C to target BS, while with target BS Interface.

Step 815, core net are by downlink transmission to target BS.

Step 816, AMF confirm path integration to target BS.

Step 817, target BS notice source base station discharge the context of to be switched UE.

Step 818, source base station discharge the context of to be switched UE.

In the embodiment shown in fig. 9, by constructing the base station cluster comprising source base station and target BS in advance, so that being subordinate to In in the cluster of base station source base station and target BS can directly pass through Xn interface connection communication, thus realize between different base station or The interaction of information needed for UE switching between the cell disposed under different base station, and then realize between different base station or be deployed in UE switching between cell under different base station.

Referring to FIG. 10, in another embodiment, it is assumed that cannot directly be connect by Xn between the member base stations of base station cluster Mouth connection, then exist such as between to be switched UE, source base station, target BS, cluster head base station, AMF server and UPF server Under interactive process:

In handoff preparation phase 91:

The content that step 901 to step 903 executes is identical to step 803 correspondence as step 801 shown in Fig. 9, refers to Above step 801 is to step 803.

Step 904, source base station send UE switching request to cluster head base station, carry to be switched UE pairs in the UE switching request The identity information of the switching mode, to be switched UE answered is (according to measurement report and wireless resource management (Radio Resource Management, RRM) information determination) and other information.

The UE switching request received is transmitted to target BS by step 905, cluster head base station, meanwhile, cluster head base station foundation Base station cluster where the cluster head base station saved in the identity information of the to be switched UE carried in UE switching request and cluster head base station UE identification authentication result (whether to be switched UE is UE in the base station cluster) obtained, is determining the to be switched UE not for interior UE information When being the UE in the base station cluster, the identity information of the to be switched UE is saved；And the UE is fed back to target BS in cluster head base station Identification authentication result.

Step 906 is identical as step 807 in embodiment shown in Fig. 9, refers to step 807.

Step 907, target BS are to response message described in cluster head base station.

Step 908, cluster head base station forward the response message to source base station.

In handover execution stage 92:

Step 909, source base station reconfigure access-in resource to be switched UE by RRC information, for example, being reconfigured to be switched UE When setting exclusive random access lead code, pre-assigned uplink authorization (preallocated uplink grant) and timing Between poor (timing adjustment indication).Specifically, when the corresponding switching mode of to be switched UE is low interruption It include pre-assigned uplink authorization (preallocated uplink grant), when prolonging switching mode, in response message Two time difference T₂With third time difference T₃, the second time difference T₂With third time difference T₃It is to be switched to can be used for be switched UE calculating Timing between UE and target BS is poor (timing adjustment indication), the timing difference and second Time difference T₂, third time difference T₃With the distance dependent of to be switched UE to target BS.About the second time difference and third time difference Definition refer to above, details are not described herein again.

Sequence number (Serial Number, SN) is submitted to cluster head base station by step 910, source base station.

SN is handed to target BS by step 911, cluster head base station.

Step 912 is identical to step 818 correspondence as the step 811 in embodiment shown in Fig. 9 to step 919, refers to Above to the explanation of Fig. 9.

In the embodiment shown in fig. 10, by constructing the base station cluster comprising source base station and target BS in advance, so that being subordinate to Belong to the source base station in the cluster of base station and target BS can be by the Xn interface and target base between source base station and cluster head base station The Xn interface connection communication stood between cluster head base station, thus realize between different base station or the cell disposed under different base station it Between UE switching needed for information interaction, and then realize between different base station or between the cell that is deployed under different base station UE switching.

In addition, in the prior art can also be by first connecting break afterwards (Make-Before-Break) and dual link (Dual Connectivity, DC) carry out UE switching.Wherein, first connect the handoff procedure to break afterwards substantially are as follows: to be switched UE receives rrc message Later, the connection between source base station, after UE initiates the transmission of uplink to target BS, to be switched UE are not disconnected It is separated from source base station.The handoff procedure of dual link is substantially are as follows: adding target BS by source base station is assistant base station (Secondary GNB), held in source base station Packet Data Convergence Protocol (Packet Data Convergence Protocol, PDCP) layer Separation is carried, data are transferred to be switched UE via source base station and target BS respectively；Then between source base station and target BS into Row role transforming, target BS become main access base station (Master gNB), and last to be switched UE is separated with source base station.

However, source base station meeting replicate data is to be switched to target BS based on first connecting in the switching for breaking switching mode afterwards UE needs the data established protocol stack respectively for source base station and target BS and need to handle the transmission of two base stations simultaneously, which meeting Occupy more resource.In the switching based on dual link switching mode, to be switched UE is also required to as source base station and target BS Protocol stack is established respectively, and the reorientation of carrying separation with PDCP layers is further related in handoff procedure, therefore switching flow is more The signaling overheads of complexity, generation is larger.

And a kind of method for UE switching that various embodiments of the present invention provide simplifies UE due to constructing base station cluster The transmission process of information needed for switching, therefore can overcome first to connect and break afterwards and the above problem present in dual link.

It is to a kind of explanation of the method for UE switching provided in an embodiment of the present invention, below for the above method above The corresponding network equipment of embodiment is illustrated.

Figure 11 shows the structural schematic diagram of the network equipment 1100 provided in an embodiment of the present invention, which specifically may be used Think source base station, as shown in figure 11, the network equipment 1100 may include:

First interactive module 1101, if for can directly be connected by Xn interface between the member base stations of base station cluster, Information needed for then the source base station directly interacts UE switching by the Xn interface with target BS；

Second interactive module 1102, if for cannot directly be connected by Xn interface between the member base stations of base station cluster, Information needed for then the source base station interacts UE switching with target BS by first interface and second interface, the first interface For the Xn interface between the source base station and the cluster head base station of the base station cluster, the second interface is the target BS and institute State the Xn interface between cluster head base station；

The base station cluster is cluster construct in advance, comprising the source base station and the target BS.

Information needed for the UE switching, including but not limited to: the UE switching request from the source base station, and come from The response message for the UE switching request of the target BS.

Optionally, in another embodiment, the to be switched UE being connect with the source base station have it is multiple, as shown in figure 12, The network equipment 1100 can also include:

Module 1103 is obtained, for obtaining the information relevant to priority ranking of the to be switched UE.

Service quality QoS demand of the to be switched UE in communication process；

The type of service of the to be switched UE；And

Generation module 1104, for generating the excellent of the to be switched UE according to the information relevant to priority ranking First grade.

Switching mode determining module 1105 determines described to be switched UE pairs for the priority based on the to be switched UE The switching mode answered.

In one example, the switching mode determining module 1105, is particularly used in: if the to be switched UE's is excellent First grade is first level, then low interruption time delay switching mode is determined as the corresponding switching mode of the to be switched UE；If institute The priority for stating to be switched UE is second level, then non-competing Random Access is determined as to the to be switched UE is corresponding to be cut Change mode；If the priority of the to be switched UE is third level, competition Random Access is determined as described to be cut Change the corresponding switching mode of UE.

Wherein, the first level is higher than second level, and the second level is higher than the third level, the low interruption The meaning of time delay switching mode refers to embodiment of the method part.

Optionally, in one example, it can directly be connected by Xn interface between the member base stations of the base station cluster, and The identity information of the to be switched UE is also carried in the UE switching request；

Optionally, described to connect if the switching mode is low interruption time delay switching mode on the basis of the example Entering resource information includes: pre-assigned uplink authorization, the first timing time difference and exclusive random access lead code；

Wherein, the timing time difference of the first timing time difference between the source base station and the target BS, and it is described The first timing time difference was used to determine the timing time difference between the to be switched UE and the target BS.

Optionally, in another example, if cannot directly be connected by Xn interface between the member base stations of base station cluster, And the identity information of the to be switched UE is also carried in the UE switching request；Then the response message is by the target BS According to the UE switching request with the UE identification authentication result from the cluster head base station determine, the UE identification authentication result by The cluster head base station authenticates the to be switched UE according to the identity information of the to be switched UE from the source base station It obtains.

Optionally, on the basis of another example, if the switching mode is low interruption time delay switching mode, The access-in resource information includes: pre-assigned uplink authorization, the second timing time difference, third timing time difference and exclusive random Access lead code.

Wherein, the timing time difference of the second timing time difference between the source base station and the cluster head base station, described The timing time difference of the three timing time differences between the target BS and the cluster head base station, and the second timing time difference and described The third timing time difference is used to determine the timing time difference between the to be switched UE and the target BS.

The network equipment 1100 shown in Figure 11 to Figure 12 pass through the base station comprising source base station and target BS constructed in advance Cluster can allow the source base station being under the jurisdiction of in the cluster of base station and target BS directly by Xn interface connection communication, or pass through The Xn interface connection communication between Xn interface and target BS and cluster head base station between source base station and cluster head base station, thus real The interaction of information needed for the UE switching between cell disposed between existing different base station or under different base station, and then realize different UE switching between base station or between the cell that is deployed under different base station.

In addition, by whether being that UE identifies in the cluster of base station, and is determining that switching UE is the base station to be switched UE In cluster when UE, then foundation UE switching request determines response message, using the side provided in an embodiment of the present invention for being used to switch UE Method realizes the switching of to be switched UE, rather than realizes the switching of to be switched UE using existing switching flow, therefore can be improved The switching rate and handover success rate of UE in the cluster of base station.

Terminal device shown in above-mentioned Figure 11 to Figure 12 can be used to implement above-mentioned Fig. 2 and switch to shown in Fig. 3 for UE Method each embodiment, related place please refers to above method embodiment.

Figure 13 shows the structural schematic diagram of the network equipment 1300 provided in an embodiment of the present invention, which specifically may be used Think target BS, as shown in figure 13, the network equipment 1300 may include:

Third interactive module 1301, if for can directly be connected by Xn interface between the member base stations of base station cluster, Information needed for then the target BS directly interacts UE switching by the Xn interface with source base station；

4th interactive module 1302, if for cannot directly be connected by Xn interface between the member base stations of base station cluster, Information needed for then the target BS interacts UE switching with source base station by first interface and second interface, the first interface For the Xn interface between the source base station and the cluster head base station of the base station cluster, the second interface is the target BS and institute State the Xn interface between cluster head base station；

Optionally, the to be switched UE connecting with the source base station has multiple；Information needed for the UE switching, it may include: UE switching request from the source base station, and the response for the UE switching request from the target BS are believed Breath.

Optionally, as an example, if the priority of the to be switched UE is first level, the to be switched UE Corresponding switching mode is low interruption time delay switching mode；If the priority of the to be switched UE is second level, described The corresponding switching mode of to be switched UE is non-competing Random Access；If the priority of the to be switched UE is the third level Not, then the corresponding switching mode of the to be switched UE is competition Random Access.

Optionally, as an example, the information relevant to priority ranking of the to be switched UE includes following message At least one of:

Service quality QoS demand of the to be switched UE in communication process；

The type of service of the to be switched UE；And

Optionally, in another embodiment, if can directly be connect by Xn between the member base stations of the base station cluster Mouth connection, and the identity information of the to be switched UE, then as shown in figure 14, the network equipment are also carried in the UE switching request 1300 may also include that

Authentication request sending module 1303, for directly being sent to the cluster head base station for described to be cut by Xn interface The identification authentication request of UE is changed, the identity information of the to be switched UE is carried in the identification authentication request.

First authenticating result receiving module 1304, for directly passing through UE body of the Xn interface from the cluster head base station Part authenticating result, the UE identification authentication result is by the cluster head base station according to the to be switched UE from the target BS Identity information the to be switched UE is authenticated to obtain

Optionally, on the basis of the embodiment shown in Figure 14, if the switching mode is low interruption time delay switching side Formula, then the access-in resource information includes: pre-assigned uplink authorization, the first timing time difference and exclusive random access preamble Code.

Optionally, in another embodiment, if cannot directly be connect by Xn between the member base stations of the base station cluster Mouth connection, and the identity information of the to be switched UE, then as shown in figure 14, the network equipment are also carried in the UE switching request 1300 may also include that

Second authenticating result receiving module 1305, for receiving the UE from the cluster head base station by the second interface Identification authentication as a result, the UE identification authentication result by the cluster head base station according to the to be switched UE from the source base station Identity information the to be switched UE is authenticated to obtain.

Optionally, on the basis of the embodiment shown in Figure 14, if the target switching mode is that low interruption time delay is cut Change mode, then the access-in resource information include: pre-assigned uplink authorization, the second timing time difference, the third timing time difference and Exclusive random access lead code.

Figure 13 passes through the base station comprising source base station and target BS constructed in advance to the network equipment 1300 shown in figure 15 Cluster can allow the source base station being under the jurisdiction of in the cluster of base station and target BS directly by Xn interface connection communication, or pass through The Xn interface connection communication between Xn interface and target BS and cluster head base station between source base station and cluster head base station, thus real The interaction of information needed for the UE switching between cell disposed between existing different base station or under different base station, and then realize different UE switching between base station or between the cell that is deployed under different base station.

Above-mentioned Figure 13 can be used to implement and switch shown in above-mentioned fig. 4 to fig. 6 for UE to terminal device shown in figure 15 Method each embodiment, related place please refers to above method embodiment.

Figure 16 shows the structural schematic diagram of the network equipment 1600 provided in an embodiment of the present invention, which specifically may be used Think cluster head base station, as shown in figure 16, the network equipment 1600 may include:

5th interactive module 1601, if for cannot directly be connected by Xn interface between the member base stations of the base station cluster Connect, then the cluster head base station by first interface receive from source base station UE switching needed for information, by second interface to Information needed for target BS sends the UE switching from the source base station, is received by the second interface and comes from the target Information needed for the UE switching of base station, and sent to the source base station from the target BS by the first interface Information needed for UE switching.

Optionally, in another embodiment, as shown in figure 17, the network equipment 1600 can also include:

Preserving module 1602, for saving the UE information in the base station cluster, the UE information is for identifying to be switched UE Identity.

Optionally, In yet another embodiment, as shown in figure 17, the network equipment 1600 can also include:

Authentication information obtains module 1603, for obtaining the identity information of the to be switched UE.

In the first instance, if can directly be connected by Xn interface between the member base stations of the base station cluster, institute State authentication information and obtain module, be particularly used in: directly by Xn interface from the target BS for it is described to Switch the identification authentication request of UE, the identity information of the to be switched UE is carried in the identification authentication request.

In second example, if cannot directly be connected by Xn interface between the member base stations of the base station cluster, institute State authentication information and obtain module, be particularly used in: by the first interface receive from the source base station for it is described to Switch the UE switching request of UE, the identity information of the to be switched UE is carried in the UE switching request.

Authentication module 1604, for according to the to be switched UE identity information and the cluster head base station in save UE letter Breath determines the UE identification authentication result for being directed to the to be switched UE.

Authenticating result sending module 1605, for sending the UE identification authentication result to the target BS.

Optionally, in another embodiment, described to be cut if the priority of the to be switched UE is first level Changing the corresponding switching mode of UE is low interruption time delay switching mode；If the priority of the to be switched UE is second level, The corresponding switching mode of the to be switched UE is non-competing Random Access；If the priority of the to be switched UE is third Rank, then the corresponding switching mode of the to be switched UE is competition Random Access.Wherein, the first level is higher than second Rank, the second level are higher than the third level.

Optionally, when authentication information obtains and uses first example in module 1603, if the to be switched UE is corresponding Switching mode be low interruption time delay switching mode, then the access-in resource information includes: pre-assigned uplink authorization, first The timing time difference and exclusive random access lead code.Wherein, the first timing time difference is the source base station and the target base The timing time difference between standing, and the first timing time difference determines between the to be switched UE and the target BS for determining When the time difference.

Optionally, when authentication information obtains and uses second example in module 1603, if the to be switched UE is corresponding Switching mode be low interruption time delay switching mode, then the access-in resource information includes: pre-assigned uplink authorization, second The timing time difference, the third timing time difference and exclusive random access lead code.Wherein, the second timing time difference is the source base station With the timing time difference between the cluster head base station, the third timing time difference is between the target BS and the cluster head base station The timing time difference, and the second timing time difference and the third timing time difference are for determining the to be switched UE and the target The timing time difference between base station.

Optionally, in another embodiment, the information relevant to priority ranking of the to be switched UE includes following At least one of information:

Service quality QoS demand of the to be switched UE in communication process；

The type of service of the to be switched UE；And

Optionally, in another embodiment, the base station cluster is geographical location information and the base station previously according to base station Load information building.

Optionally, In yet another embodiment, the network equipment 1600 can also include:

The network equipment 1600 shown in Figure 16 to Figure 17 pass through the base station comprising source base station and target BS constructed in advance Cluster can allow the source base station being under the jurisdiction of in the cluster of base station and target BS directly by Xn interface connection communication, or pass through The Xn interface connection communication between Xn interface and target BS and cluster head base station between source base station and cluster head base station, thus real The interaction of information needed for the UE switching between cell disposed between existing different base station or under different base station, and then realize different UE switching between base station or between the cell that is deployed under different base station.

Terminal device shown in above-mentioned Figure 16 to Figure 17 can be used to implement above-mentioned Fig. 7 and switch to shown in Fig. 8 for UE Method each embodiment, related place please refers to above method embodiment.

Figure 18 is please referred to, Figure 18 is the structure chart of the network equipment of application of the embodiment of the present invention, can be realized above-mentioned be used for The details of the method for UE switching, and reach identical effect.As shown in figure 18, the network equipment 1000 includes: processor 1001, receives Hair machine 1002, memory 1003, user interface 1004 and bus interface, in which:

In embodiments of the present invention, the network equipment 1000 further include: storage on a memory 1003 and can be in processor The computer program run on 1001 realizes the above-mentioned method switched for UE when computer program is by processor 1001, execution Each process, and identical technical effect can be reached, to avoid repeating, which is not described herein again.

In Figure 18, bus architecture may include the bus and bridge of any number of interconnection, specifically by 1001 generation of processor The various circuits for the memory that at least one processor and memory 1003 of table represent link together.Bus architecture can be with Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like are linked together, these are all these Well known to field, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 1002 can be with It is multiple element, that is, includes transmitter and receiver, the unit for communicating over a transmission medium with various other devices is provided. For different terminal devices, user interface 1004, which can also be, external the interface for needing equipment, the equipment of connection is inscribed Including but not limited to keypad, display, loudspeaker, microphone, control stick etc..

Processor 1001, which is responsible for management bus architecture and common processing, memory 1003, can store processor 1001 and exists Execute used data when operation.

The embodiment of the present invention also provides a kind of computer readable storage medium, and meter is stored on computer readable storage medium Calculation machine program, the computer program realize each process of the above-mentioned embodiment of the method for UE switching when being executed by processor, And identical technical effect can be reached, to avoid repeating, which is not described herein again.Wherein, the computer readable storage medium, Such as read-only memory (Read-Only Memory, abbreviation ROM), random access memory (Random Access Memory, letter Claim RAM), magnetic or disk etc..

The embodiment of the present invention also provides a kind of computer program product including instruction, when computer runs the computer When the described instruction of program product, the computer executes the above-mentioned method for UE switching.Specifically, which produces Product can be run on the above-mentioned network equipment.

Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed The scope of the present invention.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.

In several embodiments provided by the present invention, it should be understood that disclosed systems, devices and methods, it can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit It closes or communicates to connect, can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme 's.

It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.

It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention. And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), arbitrary access are deposited The various media that can store program code such as reservoir (Random Access Memory, RAM), magnetic or disk.

The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain Lid is within the scope of protection of this application.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.

Claims

1. a kind of method for UE switching, which is characterized in that be applied to source base station, which comprises

If can directly be connected by Xn interface between the member base stations of base station cluster, the source base station directly passes through the Xn Information needed for interface interacts UE switching with target BS；

If cannot directly be connected by Xn interface between the member base stations of base station cluster, the source base station by first interface and Information needed for second interface interacts UE switching with target BS, the first interface are the source base station and the base station cluster Xn interface between cluster head base station, Xn interface of the second interface between the target BS and the cluster head base station；

2. the method according to claim 1, wherein the to be switched UE connecting with the source base station has multiple, institute State method further include:

Obtain the information relevant to priority ranking of the to be switched UE；

According to the information relevant to priority ranking, the priority of the to be switched UE is generated；

Based on the priority of the to be switched UE, the corresponding switching mode of the to be switched UE is determined；

Wherein, information needed for the UE switching, comprising: the UE switching request from the source base station, and come from the mesh Mark the response message for the UE switching request of base station；

The switching mode is carried in the UE switching request, and the target BS is carried in the response message according to institute State the access-in resource information that switching mode is the to be switched UE distribution, the access-in resource information for the to be switched UE into Row UE switching.

3. according to the method described in claim 2, it is characterized in that, can directly pass through between the member base stations of the base station cluster The connection of Xn interface, and the identity information of the to be switched UE is also carried in the UE switching request；

The response message is reflected according to the UE switching request with the UE identity from the cluster head base station by the target BS It weighs result to determine, the UE identification authentication result is by the cluster head base station according to the to be switched UE from the target BS Identity information the to be switched UE is authenticated to obtain.

4. according to the method described in claim 3, it is characterized in that, if the switching mode is low interruption time delay switching side Formula, then

The access-in resource information includes: pre-assigned uplink authorization, the first timing time difference and exclusive random access preamble Code；

Wherein, the timing time difference of the first timing time difference between the source base station and the target BS, and described first The timing time difference is used to determine the timing time difference between the to be switched UE and the target BS；

The low interruption time delay switching mode include: using reduce random access RACH-less mode switch over, if using The RACH-less mode handover failure is then switched over using non-competing Random Access.

5. according to the method described in claim 2, it is characterized in that, if cannot directly pass through between the member base stations of base station cluster The connection of Xn interface, and the identity information of the to be switched UE is also carried in the UE switching request；

The response message is reflected according to the UE switching request with the UE identity from the cluster head base station by the target BS It weighs result to determine, the UE identification authentication result is by the cluster head base station according to the to be switched UE's from the source base station Identity information is authenticated to obtain to the to be switched UE.

6. according to the method described in claim 5, it is characterized in that, if the switching mode is low interruption time delay switching side Formula, then

The access-in resource information includes: pre-assigned uplink authorization, the second timing time difference, third timing time difference and exclusive Random access lead code；

Wherein, the timing time difference of the second timing time difference between the source base station and the cluster head base station, the third are fixed When the timing time difference of the time difference between the target BS and the cluster head base station, and the second timing time difference and the third The timing time difference is used to determine the timing time difference between the to be switched UE and the target BS；

7. according to the method described in claim 2, it is characterized in that, the priority based on the to be switched UE, determines institute State the corresponding switching mode of to be switched UE, comprising:

If the priority of the to be switched UE is first level, low interruption time delay switching mode is determined as described to be switched The corresponding switching mode of UE；

If the priority of the to be switched UE is second level, non-competing Random Access is determined as described to be switched The corresponding switching mode of UE；

If the priority of the to be switched UE is third level, competition Random Access is determined as the to be switched UE Corresponding switching mode；

8. the method according to claim 2, which is characterized in that

The information relevant to priority ranking of the to be switched UE includes at least one of following message:

Service quality QoS demand of the to be switched UE in communication process；

The type of service of the to be switched UE；And

9. according to the described in any item methods of claim 2-8, which is characterized in that the base station cluster is the ground previously according to base station Manage the load information building of location information and base station.

10. a kind of method for UE switching, which is characterized in that be applied to target BS, which comprises

If can directly be connected by Xn interface between the member base stations of base station cluster, the target BS directly passes through described Information needed for Xn interface interacts UE switching with source base station；

If cannot directly be connected by Xn interface between the member base stations of base station cluster, the target BS passes through first interface Information needed for interacting UE switching with source base station with second interface, the first interface are the source base station and the base station cluster Xn interface between cluster head base station, Xn interface of the second interface between the target BS and the cluster head base station；

11. according to the method described in claim 10, it is characterized in that, the to be switched UE being connect with the source base station have it is multiple；

Information needed for the UE switching, comprising: the UE switching request from the source base station, and come from the target BS The response message for the UE switching request；

Wherein, the corresponding switching mode of the to be switched UE is carried in the UE switching request, the switching mode is by described Source base station determines according to the priority of the to be switched UE, the priority of the to be switched UE by the source base station according to it is described to The information sorting relevant to priority ranking information for switching UE determines；Carried in the response message target BS according to It is the access-in resource information of the to be switched UE distribution according to the switching mode, the access-in resource information is for described to be switched UE carries out UE switching.

12. according to the method for claim 11, which is characterized in that can directly lead between the member base stations of the base station cluster The connection of Xn interface is crossed, and also carries the identity information of the to be switched UE in the UE switching request, the method also includes:

The identification authentication request for the to be switched UE, the identity mirror are directly sent to the cluster head base station by Xn interface The identity information of the to be switched UE is carried in power request；

Directly pass through UE identification authentication of the Xn interface from the cluster head base station as a result, the UE identification authentication result is by institute The identity information that cluster head base station is stated according to the to be switched UE from the target BS authenticates the to be switched UE It obtains；

Wherein, the response message is by the target BS according to the UE switching request and the UE body from the cluster head base station Part authenticating result determines.

13. according to the method for claim 12, which is characterized in that if the switching mode is low interruption time delay switching side Formula, then

14. according to the method for claim 12, which is characterized in that cannot directly lead between the member base stations of the base station cluster The connection of Xn interface is crossed, and also carries the identity information of the to be switched UE in the UE switching request, the method also includes:

By the second interface receive the UE identification authentication from the cluster head base station as a result, the UE identification authentication result by The cluster head base station authenticates the to be switched UE according to the identity information of the to be switched UE from the source base station It obtains；

15. according to the method for claim 14, which is characterized in that if the target switching mode is that low interruption time delay is cut Mode is changed, then

The low interruption time delay switching mode includes: first to be switched over using reduction random access RACH-less mode, if adopted With the RACH-less mode handover failure, then switched over using non-competing Random Access.

16. according to the method for claim 11, which is characterized in that

If the priority of the to be switched UE is first level, when the corresponding switching mode of the to be switched UE is low interruption Prolong switching mode；

If the priority of the to be switched UE is second level, the corresponding switching mode of the to be switched UE be it is non-competing with Machine access way；

If the priority of the to be switched UE is third level, the corresponding switching mode of the to be switched UE is that competition is random Access way；

17. the described in any item methods of 1-16 according to claim 1, which is characterized in that

Service quality QoS demand of the to be switched UE in communication process；

The type of service of the to be switched UE；And

18. the described in any item methods of 0-17 according to claim 1, which is characterized in that the base station cluster is previously according to base station Geographical location information and base station load information building.

19. a kind of method for UE switching, which is characterized in that applied to the cluster head base station in the cluster of base station, which comprises

If cannot directly be connected by Xn interface between the member base stations of the base station cluster, the cluster head base station passes through first Information needed for UE switching of the interface from source base station, is sent to target BS by second interface and comes from the source base station UE switching needed for information, by the second interface receive from the target BS UE switching needed for information, with And the required information of the UE switching from the target BS is sent to the source base station by the first interface；

Wherein, the base station cluster is cluster construct in advance, comprising the source base station and the target BS, the first interface For the Xn interface between the source base station and the cluster head base station of the base station cluster, the second interface is the target BS and institute State the Xn interface between cluster head base station.

20. according to the method for claim 19, which is characterized in that the method also includes:

The UE information in the base station cluster is saved, the UE information is used to identify the identity of to be switched UE.

21. according to the method for claim 20, which is characterized in that the method also includes:

Obtain the identity information of the to be switched UE；

According to the UE information saved in the identity information of the to be switched UE and the cluster head base station, determine for described to be switched The UE identification authentication result of UE；

The UE identification authentication result is sent to the target BS；

Wherein, the UE identification authentication result determines the response message for being directed to the to be switched UE, institute for the target BS Stating and carrying the target BS in response message according to the corresponding switching mode of the to be switched UE is the to be switched UE points The access-in resource information matched, the access-in resource information carry out UE switching for the to be switched UE, and the to be switched UE is corresponding Priority of the switching mode by the source base station according to the to be switched UE determine that the priority of the to be switched UE is by described Source base station is determined according to the information sorting relevant to priority ranking information of the to be switched UE.

22. according to the method for claim 21, which is characterized in that can directly lead between the member base stations of the base station cluster Cross the connection of Xn interface, the identity information for obtaining the to be switched UE, comprising:

It is directly requested by Xn interface from the identification authentication for the to be switched UE of the target BS, the body The identity information of the to be switched UE is carried in part authentication request.

23. according to the method for claim 22, which is characterized in that if the corresponding switching mode of the to be switched UE is low Time delay switching mode is interrupted, then

24. according to the method for claim 21, which is characterized in that cannot directly lead between the member base stations of the base station cluster The connection of Xn interface is crossed,

The identity information for obtaining the to be switched UE, comprising:

The UE switching request for the to be switched UE from the source base station is received by the first interface, the UE is cut Change the identity information that the to be switched UE is carried in request.

25. according to the method for claim 24, which is characterized in that if the corresponding switching mode of the to be switched UE is low Time delay switching mode is interrupted, then

26. according to the method for claim 21, which is characterized in that

27. according to the method for claim 21, which is characterized in that

Service quality QoS demand of the to be switched UE in communication process；

The type of service of the to be switched UE；And

28. the described in any item methods of 9-27 according to claim 1, which is characterized in that the base station cluster is previously according to base station Geographical location information and base station load information building.

29. according to the described in any item methods of claim 21-28, which is characterized in that the method also includes:

If the identification authentication result is the UE that the to be switched UE is not in the base station cluster, the to be switched UE is added The base station cluster is added to, and the identity information of the to be switched UE is saved.

30. a kind of network equipment, which is characterized in that be applied to source base station, comprising:

First interactive module, if for can directly be connected by Xn interface between the member base stations of base station cluster, the source Information needed for base station directly interacts UE switching by the Xn interface with target BS；

Second interactive module, if for cannot directly be connected by Xn interface between the member base stations of base station cluster, the source Information needed for base station interacts UE switching with target BS by first interface and second interface, the first interface are the source Xn interface between base station and the cluster head base station of the base station cluster, the second interface are the target BS and the cluster head base Xn interface between standing；

31. a kind of network equipment, which is characterized in that be applied to target BS, comprising:

Third interactive module, if for can directly be connected by Xn interface between the member base stations of base station cluster, the mesh Information needed for mark base station directly interacts UE switching by the Xn interface with source base station；

4th interactive module, if for cannot directly be connected by Xn interface between the member base stations of base station cluster, the mesh Information needed for mark base station interacts UE switching with source base station by first interface and second interface, the first interface are the source Xn interface between base station and the cluster head base station of the base station cluster, the second interface are the target BS and the cluster head base Xn interface between standing；

32. a kind of network equipment, which is characterized in that applied to the cluster head base station in the cluster of base station, which comprises

5th interactive module, if for cannot directly be connected by Xn interface between the member base stations of the base station cluster, institute Information needed for cluster head base station receives the UE switching from source base station by first interface is stated, by second interface to target BS Information needed for sending the UE switching from the source base station, receives the UE from the target BS by the second interface Information needed for switching, and the UE from the target BS is sent to the source base station by the first interface and switches institute The information needed；

33. a kind of network equipment, which is characterized in that the terminal device includes memory, processor and is stored in the memory Radio communication program that is upper and can running on the processor, the radio communication program are realized when being executed by the processor The step of methods as described in any item such as claim 1-29.

34. a kind of computer-readable medium, radio communication program, the wireless communication are stored on the computer-readable medium The step of methods as described in any item such as claim 1-29 are realized when program is executed by processor.