CN108810988A

CN108810988A - A kind of method and device of message transmission

Info

Publication number: CN108810988A
Application number: CN201810289567.3A
Authority: CN
Inventors: 朱奋勤; 吴问付
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-05-03
Filing date: 2018-04-03
Publication date: 2018-11-13
Anticipated expiration: 2038-04-03
Also published as: CN108810988B

Abstract

This application discloses a kind of method and devices of message transmission, are related to field of communication technology, can solve the problems, such as the equipment room load imbalance serviced for UE.The present processes include：Conversation management functional equipment receives the instruction information of the group belonging to deletion instruction and the first equipment from the first equipment, in the case where conversation management functional equipment receives the first interface release message from the first equipment, it indicates to delete the second interface information in UE session contexts according to deleting, then, when needing to send downstream message, conversation management functional equipment sends downstream message to the second equipment, and the second equipment is the equipment for being the UE services determined according to the instruction information of group.During the application is suitable for message transmission.

Description

A kind of method and device of message transmission

This application claims being submitted on May 03rd, 2017, Patent Office of the People's Republic of China, application No. is 201710305752.2, inventions A kind of priority of the Chinese patent application of entitled " method and device of message transmission ", entire contents are incorporated by reference In this application.

Technical field

This application involves the method and devices that field of communication technology more particularly to a kind of message transmit.

Background technology

In fourth generation mobile communication technology (the 4th Generation mobile communication, 4G), clothes Business gateway (Serving GateWay, SGW) can preserve the session context of user equipment (User Equipment, UE), UE Session context in be included as the UE service mobile management network element (Mobility Management Entity, MME) IP address can be from the session context of the UE of preservation when SGW needs to send with the relevant downstream messages of UE to MME It is middle obtain serve the UE MME IP address, and then according to the IP address got to the MME send with the UE it is relevant under Row message.

If in the meeting of the 5th third-generation mobile communication technology (5th-Generation mobile communication, 5G) In words management function (Session Management Function, SMF) also in this way, i.e. UE meetings are saved in SMF Context is talked about, is included as access and mobile management function to ps domain (the Core Access and of UE services in UE session contexts Mobility Management Function, AMF) in processing unit (or for UE service AMF examples) to external Message ceases, and when SMF needs send downstream message relevant with UE, last time can be obtained according to the session context of UE as UE services AMF in processing unit (or AMF examples for UE services) external interface information, and then according to getting to external Message cease, by with the relevant downstream messages of UE be sent to last time be the UE service AMF in processing unit (or be UE service AMF examples).

However in this way, when SMF needs to send downstream message relevant with UE every time, downstream message can all be sent out The processing unit (or the AMF examples serviced for UE) in the AMF that last time is UE services is given, UE can be made always by same A processing unit or AMF example services, it may appear that the phenomenon that load imbalance.

Invention content

The embodiment of the present application provides a kind of method and device of message transmission, and it is each can to solve conversation management functional equipment UE respective impact message is all sent to the first equipment that last time is UE services, the problem of caused load imbalance.

In order to achieve the above objectives, the application adopts the following technical scheme that：

In a first aspect, the application provides a kind of method of message transmission, this method includes：

Conversation management functional equipment receives the instruction of the group belonging to deletion instruction and the first equipment from the first equipment Information, in the case where conversation management functional equipment receives the first interface release message from the first equipment, session management Function device is according to the second interface information indicated in deletion UE session contexts is deleted, then, when conversation management functional equipment When needing to send downstream message, conversation management functional equipment sends the downstream message to the second equipment, according to the second equipment The equipment for being serviced for the UE that the instruction information of group determines.

Wherein, the deletion instruction is used to indicate conversation management functional equipment when receiving first interface release message, deletes Except the second interface information in user equipment (UE) session context, the first interface is wireless access network RAN and described first The interface of equipment room, the second interface are the interface of first equipment and the conversation management functional equipment room.

Conversation management functional equipment can be AMF equipment, one that the first equipment and the second equipment all can be in AMF groups A example or the first equipment and the second equipment all can be in AMF equipment a processing unit.

Compared with the prior art, conversation management functional equipment can delete in the case of the release of the first interface of the first equipment Except the second interface information in UE session contexts, then when conversation management functional equipment needs to send downstream message, with regard to nothing Method searches the interface message of last the first equipment for being UE services from UE contexts, and then can trigger and choose again For the process of the second equipment of UE services, downstream message can be sent to the second equipment, avoided by conversation management functional equipment The phenomenon that always providing the load imbalance that service occurs by the same equipment for UE.

In a kind of possible design, conversation management functional equipment receives the deletion instruction and first from the first equipment and sets The instruction information of standby affiliated group, specifically can be implemented as：Conversation management functional equipment receives the session from the first equipment Request is established, session establishment request includes the instruction information of group, deletes instruction and second interface information.

After conversation management functional equipment receives the session establishment request from the first equipment, conversation management functional equipment The instruction information of group can be deleted instruction and second interface information preservation in the UE session contexts.

By second interface information preservation in UE session contexts, before UE does not switch to idle state, session management Function device can be communicated directly according to second interface information with for the first equipment that UE is serviced, and continually gravity treatment is not necessarily to For the equipment of UE services, quality of service when UE is in connection status can be improved.Instruction will be deleted and be stored in UE sessions or more Wen Zhong, conversation management functional equipment can delete UE session contexts in time in the release message for receiving first interface In second interface information, enter connection status all by the same device service to avoid each UE, solve in the prior art Load imbalance the problem of.

In a kind of possible design, conversation management functional equipment indicates to delete the in UE session contexts according to deleting Two interface messages, specifically can be implemented as：Conversation management functional equipment is indicated according to the deletion in UE session contexts, deletes UE Second interface information in session context.

In a kind of possible design, conversation management functional equipment receives the deletion instruction and first from the first equipment and sets The instruction information of standby affiliated group, specifically can be implemented as：Conversation management functional equipment receives the session from the first equipment Request is established, session establishment request includes the instruction information of the group and the second interface information, then session management Function device receives the first interface release message from the first equipment, and first interface release message includes deleting instruction.

After conversation management functional equipment receives the session establishment request from the first equipment, conversation management functional equipment It can be by the instruction information of group and second interface information preservation in UE session contexts.

By second interface information preservation in UE session contexts, before UE does not switch to idle state, session management Function device can be communicated directly according to second interface information with for the first equipment that UE is serviced, and continually gravity treatment is not necessarily to For the equipment of UE services, quality of service when UE is in connection status can be improved.

In a kind of possible design, conversation management functional equipment receives the deletion instruction and first from the first equipment and sets The instruction information of standby affiliated group, specifically can be implemented as：Conversation management functional equipment receives first from the first equipment Interface release message, first interface release message include instruction information and the deletion instruction of group.

Before conversation management functional equipment receives the first interface release message from the first equipment, conversation management functional Equipment receives the session establishment request from the first equipment, and session establishment request includes the second interface information, then can Words management function equipment is by the second interface information preservation in UE session contexts.

It is carried in first interface release message and deletes instruction, conversation management functional equipment can be made to connect receiving first In the case of mouth release message, the second interface information in UE session contexts is deleted in time, enters connection to avoid each UE State all by the same device service, solves the problems, such as load imbalance in the prior art.

In a kind of possible design, conversation management functional equipment indicates to delete the in UE session contexts according to deleting Two interface messages, specifically can be implemented as：Conversation management functional equipment refers to according to the deletion that first interface release message includes Show the second interface information in the session context for deleting UE.

In a kind of possible design, the instruction information of group is the group identities mark ID of group；Conversation management functional Equipment can be determined as the second equipment of UE services according to group ID, and then conversation management functional equipment passes through conversation management functional Interface between equipment and the second equipment sends downstream message to the second equipment.

In a kind of possible design, the instruction information of group is the default route of group；When conversation management functional equipment When needing to send downstream message, the corresponding equipment of default route of conversation management functional equipment to group sends downstream message, so The second device identification of the corresponding equipment of default route from group is received afterwards, and the second equipment is that the default route of group corresponds to Equipment be UE selections the second equipment, and then conversation management functional equipment by conversation management functional equipment and the second equipment it Between interface, send downstream message to corresponding second equipment of the second device identification.

In a kind of possible design, the instruction information of group is the default route of group；When conversation management functional equipment When needing to send downstream message, conversation management functional equipment is sent by the corresponding equipment of default route of group to the second equipment Downstream message, the second equipment are that the corresponding equipment of default route of group is the second equipment of UE selections.

In a kind of possible design, in conversation management functional equipment by the corresponding equipment of default route of group to After two equipment send downstream message, after conversation management functional equipment receives the message from second equipment, session Interface message between conversation management functional equipment and the second equipment is stored in UE session contexts by management function equipment.

By the way that the interface message between conversation management functional equipment and the second equipment is stored in UE session contexts, UE is switched to before idle state, conversation management functional equipment there is no need to when sending the downstream message of the UE every time all again The equipment for being selected as UE services, can save expense, avoid leading to UE service disconnections due to gravity treatment for the UE equipment serviced Situation.

Second aspect, this application provides a kind of method of message transmission, this method includes：

Conversation management functional equipment obtains stateless instruction information and the group of the affiliated group of the first equipment indicates information, nothing Status indication information is used to indicate conversation management functional equipment and is determining the corresponding signaling connection of user equipment (UE) and first interface Binding release after when needing to send downstream message, indicate that information select to be used for the second equipment for servicing for UE according to group, so Afterwards, in the case where conversation management functional equipment receives the notice of the release from the first equipment, when conversation management functional equipment When needing to send downstream message, conversation management functional equipment sends downstream message to the second equipment.Wherein, the first equipment is signaling Connection and the equipment for UE services before the binding release of first interface, first interface is wireless access network RAN and the first equipment room Interface, the second equipment be according to group indicate information determine for be UE service equipment.Release notice is for indicating letter Connection and the binding of first interface is enabled to have discharged.

Conversation management functional equipment can be AMF equipment, one that the first equipment and the second equipment all can be in AMF groups A example or the first equipment and the second equipment all can be in AMF equipment a processing unit.Group belonging to first equipment Group's instruction information of group can be AMF groups ID, or the default route of AMF groups.

Wherein, the binding release of signaling connection and first interface includes but not limited to following two situations：

The first：The corresponding signaling connection releases of UE, and the binding of signaling connection and first interface also discharges.

Second：The binding of signaling connection and first interface discharges, and the corresponding signaling connections of UE do not discharge.

Compared with the prior art, conversation management functional equipment is in the binding for determining UE corresponding signaling connection and first interface It has been discharged that, and needed in the case of sending downstream message, can have been sent to the second equipment for being serviced for UE reselected Downstream message, the phenomenon that avoiding always to provide the load imbalance that service occurs by the same equipment for UE in this way.

In a kind of possible design, conversation management functional equipment to the second equipment before sending downstream message, session Management function equipment can determine that the binding of the corresponding signaling connections of UE and first interface discharges.

In a kind of possible design, if conversation management functional module needs to send downstream message, and determine that UE is corresponding The binding of signaling connection and first interface discharges, then indicates that information is determined for the second equipment for UE services according to group.

Using this method, the feelings of the signaling connection of UE and the binding release of first interface are determined in conversation management functional equipment Under condition, it is determined as the second equipment of UE services, it can be to avoid service be provided by the first equipment for terminal always, in subsequent session pipe When reason function device needs to send downstream message, downstream message can be sent to terminal by the second equipment.

In a kind of possible design, conversation management functional equipment obtains group's instruction letter of the affiliated group of the first equipment Breath, specifically can be implemented as：

Conversation management functional equipment receives the session establishment request from the first equipment, and session establishment request includes group Indicate information；Alternatively, conversation management functional equipment receives the release notice from the first equipment, release notice includes that group refers to Show information.

In a kind of possible design, conversation management functional equipment obtains stateless instruction information, including：

Conversation management functional equipment receives the session establishment request from the first equipment, and session establishment request includes ill-mannered State indicates information；Alternatively, it includes ill-mannered that conversation management functional equipment, which receives the release notice release notice from the first equipment, State indicates information；Alternatively, conversation management functional equipment is from being locally configured, acquisition in information is stateless to indicate information.

In alternatively possible design, release notice includes deleting instruction.Wherein, it deletes instruction and is used to indicate session Management function equipment deletes the information of the first equipment.

Using this method, conversation management functional equipment is discharged in the binding of corresponding UE signaling connection and first interface In the case of, the information of the first equipment in UE session contexts can be deleted, then when conversation management functional equipment needs to send out When sending downstream message, the information of last the first equipment for being UE services can not be just searched from UE contexts, and then can It is chosen for the process of the second equipment of UE services again with triggering, downstream message can be sent to the by conversation management functional equipment Two equipment avoid the phenomenon that always providing the load imbalance that service occurs by the same equipment for UE.

In a kind of possible design, after conversation management functional equipment receives the notice of the release from the first equipment, Conversation management functional equipment is according to the stateless information for indicating the first equipment in information deletion UE session contexts.

In alternatively possible design, the notice of the release from the first equipment is received in conversation management functional equipment Afterwards, conversation management functional equipment preserves the release conditions of the binding of signaling connection and first interface, then works as conversation management functional When equipment needs to send downstream message, conversation management functional is determined according to the release conditions of the binding of signaling connection and first interface The binding of signaling connection and first interface has discharged, and then conversation management functional indicates that information is determined for being taken for UE according to group Second equipment of business.

Using this method, after the binding release of signaling connection and first interface, conversation management functional equipment can preserve letter The release conditions of connection and the binding of first interface are enabled, in turn, if conversation management functional equipment needs to send downstream message, It determines for the second equipment for UE services, avoids providing to service for UE using the first equipment always leading to load imbalance, If conversation management functional need not subsequently send downstream message, the second equipment for being serviced for UE, Ke Yijie are not needed to determine Save overhead.

In alternatively possible design, group indicates that the group identities that information is the affiliated group of the first equipment identify ID； Correspondingly, conversation management functional equipment sends downstream message to the second equipment, specifically can be implemented as：If conversation management functional is set It is standby to need to send downstream message, and determine that the binding of the corresponding signaling connections of UE and first interface has discharged, then according to group ID It is determined as the second equipment of UE services.

The third aspect, this application provides a kind of message transmission device, the device may be implemented above-mentioned first aspect or Function in second aspect performed by conversation management functional equipment, the function can be by hardware realizations, can also be by hard Part executes corresponding software realization.The hardware or software include one or more above-mentioned corresponding modules of function.

In a kind of possible design, the structure of the device includes processor and communication interface, which is configured To support the device to execute corresponding function in the above method.The communication interface is for supporting between the device and other network elements Communication.The device can also include memory, which preserves the necessary program of the device and refer to for being coupled with processor Order and data.

Fourth aspect, the application provide a kind of system of message transmission, which includes first aspect or second aspect Group belonging to conversation management functional equipment, UE, RAN and the first equipment.

5th aspect, this application provides a kind of computer storage medias, are set for being stored as above-mentioned conversation management functional Standby computer software instructions used comprising for executing the program designed by above-mentioned aspect.

6th aspect, the application provides a kind of computer program product, such as computer readable storage medium, including is used for Execute the program designed by above-mentioned aspect.

Description of the drawings

Fig. 1 is a kind of structural schematic diagram of communication system provided by the present application；

Fig. 2 is the structural schematic diagram of another communication system provided by the present application；

Fig. 3 is a kind of structural schematic diagram of AMF equipment provided by the present application；

Fig. 4 is the structural schematic diagram of another kind AMF equipment provided by the present application；

Fig. 5 is a kind of structural schematic diagram of SMF equipment provided by the present application；

Fig. 6 is a kind of flow chart of the method for message transmission provided by the present application；

Fig. 7 is the flow chart of the method for another message transmission provided by the present application；

Fig. 8 is the flow chart of the method for another message transmission provided by the present application；

Fig. 9 is a kind of structural schematic diagram of the device of message transmission provided by the present application；

Figure 10 is the flow chart of the method for another message transmission provided by the present application；

Figure 11 is the structural schematic diagram of the device of another message transmission provided by the present application.

Specific implementation mode

System architecture described herein and business scenario be in order to more clearly illustrate the technical solution of the application, The restriction for technical solution provided by the present application is not constituted, those of ordinary skill in the art are it is found that with system architecture It develops and the appearance of new business scene, technical solution provided by the present application is equally applicable for similar technical problem.

It should be noted that in the application, " illustrative " or " such as " etc. words make example, illustration for indicating or say It is bright.Described herein as " illustrative " or " such as " any embodiment or design scheme be not necessarily to be construed as than it His embodiment or design scheme more preferably or more advantage.Specifically, use " illustrative " or " such as " etc. words be intended to Related notion is presented in specific ways.

It should be noted that in the application " (English：Of) ", corresponding " (English corresponding, Relevant) " and " corresponding (English：Corresponding it) " can use with sometimes, it is noted that do not emphasizing it When difference, meaning to be expressed is consistent.

Before the technical solution of detailed description the application, in order to make it easy to understand, first being applied to embodiments herein Scene be introduced.

Embodiments herein is applied in communication system as shown in Figure 1, which includes that conversation management functional is set Standby 101, it accesses and mobile management function to ps domain equipment 102 and access network equipment 103.

Wherein, access and mobile management function to ps domain equipment 102 include multiple equipment, for example, can include the first equipment Can also include ASF units in access and mobile management function to ps domain equipment 102 with the second equipment, ASF units are a network work( Can, it is specifically as follows one shown in Fig. 3 default AMF example, or may be a special network function, such as can be with For a load equalizer.

Conversation management functional equipment 101, for receiving the group belonging to deletion instruction and the first equipment from the first equipment The instruction information of group, wherein the first equipment is the equipment accessed with being currently UE services in mobile management function to ps domain equipment 102, Group belonging to first equipment is access and mobile management function to ps domain equipment 102.

The first equipment in access and mobile management function to ps domain equipment 102, for being sent to conversation management functional equipment 101 First interface release message, first interface are the interface of access network equipment 103 and the first equipment room.

Conversation management functional equipment 101 is additionally operable in the feelings for receiving the first interface release message from the first equipment Under condition, indicate to delete the second interface information in UE session contexts according to deleting, second interface is the first equipment and session pipe Manage the interface between function device 101.It then, can be to the when conversation management functional equipment 101 needs to send downstream message Two equipment send downstream message, and the second equipment is the equipment for being the UE services determined according to the instruction information of group.

It should be noted that the UE involved by the application may include it is various have the hand-held of wireless communication function set Standby, mobile unit, wearable device, computing device are connected to other processing equipments of radio modem and various The terminal of form, mobile station (Mobile Station, MS), user equipment (User Equipment, UE), terminal device (Terminal Equipment), software terminal etc..For convenience of description, in the application, apparatus mentioned above is referred to as UE.

In addition, the application is suitable for 5G networks, and when the application is applied to 5G networks, Organization Chart such as Fig. 2 of communication system Shown, which includes authentication server functions (Authentication Server Function, AUSF) equipment, uniformly Data management (Unified Data Management, UDM) equipment, AMF equipment, SMF equipment, policy control functions (Policy Control function, PCF) equipment, UE, wireless access network (Radio Access Network, RAN) or access net (Access Network, AN), user plane functions (User Plane Function, UPF) equipment, data network (Data Network, DN) equipment.

Wherein, the conversation management functional equipment 101 in Fig. 1 can be implemented as the SMF equipment in Fig. 2, the access in Fig. 1 and Mobile management function device 102 can be implemented as the AMF equipment in Fig. 2, and the access network equipment 103 in Fig. 1 can be implemented as Fig. 2 In RAN or AN.Hereinafter with conversation management functional equipment 101 for SMF equipment, access and mobile management function device 102 It is described for being RAN for AMF equipment, access network equipment 103.

AMF equipment can serve UE, be authorized and managed the mobility of UE for the access of UE, meanwhile, AMF equipment is also For transmitting Non-Access Stratum (Non Access Stratum, NAS) message etc. between UE and SMF.RAN can be set with UE and AMF The NAS message can be transmitted to AMF equipment by standby communication for example, after RAN receives the NAS message that UE is sent.SMF equipment It can be communicated with AMF equipment, such as downstream message etc. can be sent to AMF equipment.SMF equipment is additionally operable to carry out session Management, such as SMF equipment can safeguard the interface message between the AMF equipment in UE session contexts and SMF equipment, in order to SMF equipment, can be directly according to the interface stored in the session context of the UE when receiving the downstream message for a certain UE Information is determined as the AMF equipment of UE services.

Wherein, the serial number marked on the line in Fig. 2 between each equipment is used to distinguish the interface between distinct device, Fig. 2 Only a kind of illustrative diagram, the application do not limit the serial number of each equipment interface.Illustratively, UE in Fig. 2 It is communicated with AMF by N1 interfaces, RAN is communicated by N2 interfaces with AMF, is communicated with UPF by N3 interfaces, respectively It is communicated by N9 interfaces between UPF, UPF is interconnected by N6 interfaces and DN.SMF is passed through by N4 Interface Controllers SMF, AMF N11 interfaces are communicated with SMF, and AMF and SMF obtain user contracting data by N8 interfaces and N10 interfaces from UDM respectively, point Not by N15 interfaces and N7 interfaces from PCF acquisition strategy data.In addition, AMF equipment rooms are communicated by N14 interfaces, AUSF It is communicated with AMF by N12 interfaces, is communicated with UDM by N13 interfaces.

It should be noted that the structural schematic diagram for the communication system that Fig. 1 and Fig. 2, which are only the application, to be applied, in practical portion During administration, the quantity of equipment is not limited to number of devices illustrated in fig. 1 and 2 in communication system.In addition, each in Fig. 1 to Fig. 2 A equipment may be realized by an entity device, it is also possible to be realized jointly by multiple entity devices, it is also possible to an entity A logic functional block in equipment, the embodiment of the present application are not especially limited this.

It should be noted that UE, RAN, AMF equipment, SMF equipment, AUSF equipment and UDM equipment etc. in above-mentioned 5G networks Only it is a name, name does not constitute equipment itself restriction.In 5G networks and following other networks, UE, RAN, AMF Network element or entity corresponding to equipment, SMF equipment, AUSF equipment and UDM equipment can also be other names, and the application is implemented Example is not especially limited this.For example, the UDM equipment is it is also possible to be replaced by user attaching server (Home Subscriber Server, HSS) either user-subscribed database (User Subscription Database USD) or Database entity, etc. is described collectively herein, is repeated no more below.

It should be noted that AMF equipment in Fig. 2 can there are two types of realization method, the first realization method such as Fig. 3 institutes Show, Fig. 3 is shown in which an AMF equipment, includes database (Database, DB), at least one load balancing in AMF equipment (Load Balancer, LB) unit and at least two processing units.Wherein, LB units are used to select processing unit for UE, and The NAS message received is distributed to corresponding processing unit, processing unit is multiple for handling the message such as the NAS received Processing unit can be with the data in shared data bank.

Specifically, each LB units and processing unit have external interface, when RAN equipment initializes, AMF can be set The external interface of standby middle LB units is configured as the external interface of AMF equipment in RAN equipment, is in when RAN equipment receives After the NAS message that the UE of idle state is sent, RAN equipment first selects an AMF equipment, then from the AMF device configurations in RAN One is selected in LB unit interfaces in equipment, and then NAS message is sent in AMF equipment by the LB unit interfaces of selection LB units, after LB units receive the NAS message, for the NAS message distribute a processing unit.When UE is in connection status When, RAN equipment can be communicated directly with the processing unit, be no longer needed to through LB unit forwards data.

AMF equipment in Fig. 2 can also realize in a manner of group, as shown in figure 4, in AMF groups comprising database, extremely A few LB unit and at least two AMF examples.Wherein, LB units are used to select AMF examples for UE, and will receive NAS message is distributed to corresponding AMF examples, and for handling the message such as the NAS received, multiple AMF examples can be total to AMF examples Enjoy the data in data.

Specifically, each LB units and AMF examples have external interface, it, can be by LB units when RAN equipment initializes External interface configured in RAN equipment as the external interface of AMF groups, be in idle condition when RAN equipment receives After the NAS message that UE is sent, RAN equipment can select an AMF group, then select a LB unit interface of the AMF groups, NAS message is sent to the LB units in AMF groups by the LB unit interfaces, after LB units receive the NAS message, for this NAS message distributes an AMF example.When UE is in connection status, RAN equipment can be communicated directly with the AMF examples, nothing LB unit forwards data need to be passed through again.

In the prior art, it is after UE selects processing unit or AMF examples in LB units, SMF equipment can will be established Session either session activation when be UE service processing unit or AMF examples external interface information preservation above and below UE sessions Wen Zhong, when SMF equipment needs to send downstream message, SMF equipment was always UE according to the last time preserved in UE session contexts Downstream message is sent to the processing list that last time is UE services by the processing unit of service or the external interface information of AMF examples Member or AMF examples.It allows for trigger to from UE is switched to from idle state during connection status in this way The reuse adoption process for managing unit or AMF examples, saved as in the UE session contexts of SMF equipment UE services processing unit or After person's AMF examples, which can be always by the same processing unit or AMF example services, even if last time is UE services The load of AMF examples is very big, and the load very little of other AMF examples in AMF groups, AMF can still send downstream message The phenomenon that being the AMF examples that the UE is serviced to last time, being susceptible to load imbalance.

In order to avoid there is the phenomenon that load imbalance, the principle of the application is：When the AMF equipment in Fig. 2 is embodied as Fig. 3 When, processing unit in AMF equipment is in the session establishment request sent to SMF equipment or is carried in N2 release messages and deletes instruction It is identified with SMF, and then in the case where SMF equipment receives N2 release messages, SMF equipment can be deleted according to instruction is deleted Interface message between processing unit in UE session contexts and SMF equipment, in this way when SMF equipment needs to send downstream message When, due in UE session contexts without the interface message between processing unit and SMF equipment, so SMF equipment can only Downstream message is sent to the processing unit reselected according to AMF marks, avoids to send out to the same processing unit every time Send downstream message and occur load imbalance the problem of.

Equally, when the AMF in Fig. 2 is embodied as Fig. 4, the AMF examples in AMF groups are in the session sent to SMF equipment It establishes in request or N2 release messages to carry and deletes instruction and AMF group identifications, and then receive N2 releases in SMF equipment and disappear In the case of breath, SMF equipment can indicate to delete the AMF examples in UE session contexts and between SMF equipment according to deleting Interface message, in this way when SMF equipment need send downstream message when, due to there is no AMF examples in UE session contexts With the interface message between SMF equipment, so SMF equipment can only be sent according to AMF group identifications to the AMF examples that reselect Downstream message, avoid every time to the same AMF examples send downstream message and occur load imbalance the problem of.

In embodiments herein, the structure of the SMF equipment in Fig. 1 and Fig. 2 is as shown in figure 5, SMF equipment can wrap It includes：Memory 501, processor 502, communication interface 503 and bus 504, bus 504 is for realizing the company between these devices It connects and is in communication with each other.

Wherein, communication interface 503 can be realized by antenna, can be used for carrying out data interaction between ext nal network element, Such as：The communication interface 503 of SMF equipment can receive and dispatch the data packet or other information with AMF equipment rooms.

Processor 502, it may be possible to central processing unit (English：Central Processing Unit, CPU), can also be Specific integrated circuit (English：Application Specific Integrated Circuit, ASIC), or be configured At the one or more integrated circuits for implementing the embodiment of the present invention.Such as：One or more microprocessors (English：Digital Singnal Processor, DSP), or, one or more field programmable gate array (English：Field Programmable Gate Array, FPGA).Processor 502 has processing management function, specifically, the place in SMF equipment The data or information that reason device 502 can send the AMF equipment, UPF equipment or PCRF equipment that receive be handled or right The information or data that other equipment is sent is handled.

Memory 501 can be read-only memory (Read-Only Memory, ROM) or can store static information and refer to The other kinds of static storage device enabled, random access memory (Random Access Memory, RAM) or can store The other kinds of dynamic memory of information and instruction, can also be Electrically Erasable Programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), CD-ROM (Compact Disc Read-Only Memory, CD-ROM) or other optical disc storages, optical disc storage (including compression optical disc, laser disc, light Dish, Digital Versatile Disc, Blu-ray Disc etc.), magnetic disk storage medium or other magnetic storage apparatus or can be used in carry or Store with instruction or data structure form desired program code and can by any other medium of computer access, but It is without being limited thereto.Memory 501 can be individually present, and be connected with processor 502 by bus 504.Memory 501 can also It is integrated with processor 502.

Disappear to provided by the present application below with reference to Fig. 1 to communication system shown in fig. 5 and AMF equipment and SMF equipment The method of breath transmission is specifically addressed.

First, to this application involves to term simply introduced, with facilitate understand.

1), first interface

Interface (N2 in corresponding diagram 2) of the first interface between AMF equipment shown in Fig. 2 and RAN equipment.

2), second interface

Interface of the second interface between AMF equipment shown in Fig. 2 and SMF equipment is being UE specially in AMF equipment Interface between the first equipment and SMF equipment of service.

3), the first equipment

When the AMF equipment in Fig. 2 is embodied as Fig. 3, the first equipment is a processing unit in AMF equipment, and first sets Standby affiliated group is the AMF equipment where processing unit, and second interface is that a processing unit in AMF equipment is set with SMF Interface (N11 in corresponding diagram 2) between standby.

When the AMF equipment in Fig. 2 is embodied as AMF groups shown in Fig. 4, the first equipment is an AMF in AMF groups Example, the group belonging to the first equipment are the AMF groups where AMF examples, and second interface is an AMF reality in AMF groups Interface (N11 in corresponding diagram 2) between example and SMF equipment.

4), the second equipment

Second equipment is the of SMF equipment in deleting UE session contexts between the first equipment preserved and SMF equipment After two interface messages, what is redefined is used for the equipment for UE services.

When the AMF equipment in Fig. 2 is embodied as Fig. 3, the second equipment is a processing unit in AMF equipment.

When the AMF equipment in Fig. 2 is embodied as AMF groups shown in Fig. 4, the second equipment is an AMF in AMF groups Example.

As shown in fig. 6, in order to solve the problems, such as that load imbalance in the prior art, embodiments herein provide one kind The method of message transmission, when this method is applied in scene shown in Fig. 4, with UE, RAN equipment, AMF examples 1, AMF examples It is illustrated for interaction flow between 2 and SMF equipment, wherein AMF examples 1 and AMF examples 2 belong to the same AMF Group, this method include three phases, and the first stage is session establishment process, corresponding step 601 to step 603；Second stage Enter the processing procedure of idle state, corresponding step 604 to step 607 for UE；Phase III is that SMF equipment needs to send downlink When message, UE reenters the process of connection status, corresponding step 608 to step 611.This method specifically includes：

601, UE sends session establishment request to AMF examples 1, and AMF examples 1 receive session establishment request.

Wherein, UE sends session establishment to AMF examples 1 and asks to be to trigger User Datagram Protocol (User Datagram Protocol, PDU) session establishment process, when UE initiate PDU session establishments process when, UE be in connection shape State, at this time for UE service be AMF examples 1.

602, AMF examples 1 send session establishment request to SMF equipment, and SMF equipment receives session establishment request.

Wherein, session establishment request can have following three kinds of realization methods.

The first：Session establishment request includes the second interface information (N11 interface messages) of AMF examples 1.

Second：Session establishment request includes second interface information (N11 interface messages), the AMF examples 1 of AMF examples 1 The instruction information of affiliated AMF groups.

The third：Session establishment request includes AMF examples 1 second interface information (N11 interface messages), deletion refer to Show, the instruction information of AMF groups belonging to AMF examples 1.

It should be noted that the instruction information of AMF groups can be AMF groups ID, or the default road of AMF groups By.It is illustrated so that the instruction information of AMF groups is AMF groups ID as an example in the corresponding embodiments of Fig. 6.

It should be noted that according to the third above-mentioned realization method, AMF examples 1 need to first judge the AMF groups belonging to itself It is stateless whether group is supported, if AMF community supportings are stateless, AMF examples 1 can will just delete instruction carrying and be asked in session establishment In.Wherein, in conjunction with Fig. 4, AMF community supportings refer to statelessly, and AMF examples do not preserve UE session context informations, in AMF groups The session context information of UE of each AMF examples service be saved in the DB of AMF groups, it is each in same AMF groups A AMF examples can share the UE session context informations stored in DB, and AMF examples each in this way can not only handle itself clothes The relevant information for the UE being engaged in can also handle the relevant information of other UE.

Wherein, it deletes instruction and is used to indicate SMF equipment when receiving first interface release message, delete SMF equipment and deposit Second interface information in the UE session contexts of storage.

603, the information preservation that SMF equipment carries in asking session establishment is in UE session contexts.

It is understood that in each realization method for the session establishment request that above-mentioned steps 602 describe, session establishment The second interface information of AMF examples 1 can be all carried in request, because the AMF examples for being currently UE services are AMF examples 1, SMF equipment need to be by the second interface information preservation of AMF examples 1 in UE session contexts, in order to be in connection status in UE When, SMF equipment can be sent out directly by the second interface information preserved in UE session contexts to the AMF examples 1 serviced for UE Send downstream message.

In addition, if further including the instruction information of AMF groups in session establishment request, SMF equipment is also needed AMF groups Instruction information preservation in UE session contexts, equally, if further including deleting instruction in session establishment request, SMF sets It is stored in UE session contexts for also needing to delete instruction.

It should be noted that UE session contexts can be stored in SMF equipment, can also be stored in other has storage In the equipment of function.

Above-mentioned steps 601 to step 603 is session establishment process, after completing session establishment, when UE enters idle shape When state, also need to execute the processing procedure that UE enters idle state.

604, RAN equipment sends first interface release request message to AMF examples 1, and AMF examples 1 receive first interface and release Put request message.

605,1 equipment of AMF examples discharges request message according to first interface and discharges first interface.

It is understood that after AMF examples 1 discharge the first interface between AMF examples 1 and RAN, UE is cut by connection status It is changed to idle state.

606, AMF examples 1 send first interface release message to SMF equipment, and SMF equipment receives first interface release and disappears Breath.

It should be noted that corresponding to step 602, first interface release message also includes three kinds of realization methods.

The first：If session establishment request is the first realization method described in step 602, first interface release disappears The instruction information for deleting the AMF groups belonging to instruction, AMF examples 1, first interface release notice can be carried in breath.

Second：If session establishment request is second of realization method described in step 602, first interface release disappears Deletion instruction, first interface release notice can be carried in breath.

The third：If session establishment request is the third realization method described in step 602, first interface release disappears First interface release notice can be carried in breath.

It should be noted that if AMF examples 1 will carry deletion instruction in first interface release message, need to first judge certainly Whether the AMF groups belonging to body support statelessly, if AMF community supportings are stateless, AMF examples 1 can will just delete instruction and carry In first interface release message.

607, SMF equipment indicates to delete in UE sessions in the case where receiving first interface release message according to deleting Second interface information hereinafter.

Wherein, instruction is deleted if being carried in first interface release message, SMF equipment directly disappears according to first interface release The second interface information in UE session contexts is deleted in the deletion instruction carried in breath.If not carried in first interface release message Instruction is deleted, and saves deletion instruction in UE session contexts, then SMF equipment is according to the deletion preserved in UE session contexts Second interface information is deleted in instruction.

SMF equipment receives first interface release message, illustrates that UE comes into idle state, and SMF equipment is deleted at this time Second interface information in UE session contexts, can be to avoid when the UE reenters linking status, and SMF equipment is still according to UE Second interface information in session context is by AMF examples 1 as the AMF examples serviced for UE.At this time due to UE sessions above and below Second interface information is not present in text, can only just be chosen for the AMF examples of UE services again in AMF groups, avoid always It is serviced for UE by the same AMF examples.

Above-mentioned steps 604 are to the processing procedure that step 607 is that UE enters idle state, if follow-up SMF equipment receives For the downstream message of the UE, then also needs to execute following steps 608 to step 611, UE is made to reenter connection status.

608, when SMF equipment needs to send downstream message, SMF equipment is selected according to AMF groups ID from AMF groups For the AMF examples of UE services, for example, AMF examples 2.

Wherein, SMF equipment can be according to AMF groups ID from network storage function (Network Function Repository Function, NRF) the AMF examples of UE services are look in equipment or other equipment.SMF equipment according to The specific method that AMF groups ID is selected as the AMF examples of UE services is same as the prior art, and details are not described herein again.

In one possible implementation, SMF equipment can be after reselecting the AMF examples 2 serviced for UE, in UE The interface message between SMF equipment and AMF examples 2 is preserved in session context, in order to be constantly in connection status in the UE In the case of, SMF equipment is directly communicated with AMF examples 2, without reselecting AMF examples.Alternatively, alternatively possible Realization method in, SMF equipment can also be preserved by subsequent step 610 to step 611 between SMF equipment and AMF examples 2 Interface message.

609, SMF equipment sends downstream message, AMF by the interface between SMF equipment and AMF examples 2 to AMF examples 2 Example 2 receives downstream message.

It should be noted that downstream message is being sent to the AMF examples 2 found according to AMF group identifications by SMF equipment Later, AMF examples 2 can also be that UE chooses an AMF example, such as AMF examples 3, and sends downlink to AMF examples 3 again Message, or the mark of AMF examples 3 is sent to SMF equipment, send downstream message from SMF equipment to AMF examples 3.

Wherein, AMF examples 2 receive the flow and prior art phase of the subsequent processing downstream message after downstream message Together, details are not described herein again.

It should be noted that in subsequent flow, after UE reenters connection status, step can also be performed 610 to 611.

610, AMF examples 2 send response message to SMF equipment, and response message includes between AMF examples 2 and SMF equipment Interface message, SMF equipment receive response message.

611, the interface message between AMF examples 2 and SMF equipment is stored in UE session contexts by SMF equipment.

Embodiments herein provide message transmission method, compared with the prior art in SMF equipment always select The secondary AMF examples for UE services provide service for UE, in embodiments herein, in the RAN release RAN and AMF for UE services When interface between example, illustrate that UE enters idle state, SMF equipment can service the SMF equipment in UE contexts with for UE AMF examples between interface message delete, and then when SMF equipment need send for the UE downstream message when, just can not It is directly interface message between the AMF examples and SMF equipment that the UE is serviced from being searched in UE contexts last, it would not be after It is continuous to select the AMF examples that last time services for UE, but go to reselect AMF examples, SMF equipment is avoided so always to be selected The phenomenon that load imbalance, occurs caused by the AMF examples that last time services for UE.

In the embodiment shown in fig. 6, it is to be illustrated so that the instruction information of AMF groups is AMF groups ID as an example, In another realization method that embodiments herein provides, the instruction information of AMF groups can also be the default road of AMF groups By when the instruction information of AMF groups is the default route of AMF groups, as shown in fig. 7, this method can be implemented as following step Rapid 701 to step 712.

Wherein, step 701 is identical to step 607 as above-mentioned steps 601 to step 707, step 711 to 712 and above-mentioned step Rapid 610 is identical to step 611, and details are not described herein again.

708, when SMF equipment, which connects, to be needed to send downstream message, the default route of SMF equipment to AMF groups is corresponding to be set Preparation send downstream message, the corresponding equipment of default route of AMF groups to receive downstream message.

Wherein, the default route of AMF groups is directed toward ASF units, wherein ASF units are a network functions, specifically can be with It for the default AMF examples in AMF groups, or may be a special network function, such as can be that a load is equal Weighing apparatus.

709, ASF Unit selections are the AMF examples of UE services, for example, AMF examples 2.

710, ASF units send downstream message to AMF examples 2, and AMF examples 2 receive downstream message.

Alternatively, in alternatively possible realization method, step 710 may be replaced by ASF units and be sent to SMF equipment The mark of AMF examples 2, then SMF equipment downstream message is sent to AMF examples 2 according to the marks of AMF examples 2.

The corresponding embodiments of Fig. 6 and Fig. 7 are when the method that the message of the application is transmitted is applied to scene shown in Fig. 4 Realization method, in another embodiment of the application, the method for the message transmission of the application can also be applied to field shown in Fig. 3 Jing Zhong is illustrated by taking the interaction flow between UE, RAN equipment, processing unit 1, processing unit 2 and SMF equipment as an example, Wherein, processing unit 1 and processing unit 2 belong to the same AMF equipment, as shown in figure 8, this method includes：

801, UE sends session establishment request to processing unit 1, and processing unit 1 receives session establishment request.

Wherein, it is in order to trigger the process of PDU session establishments, when UE is sent out that UE sends session establishment request to processing unit 1 Rise PDU session establishments process when, UE be in connection status, at this time for UE service be processing unit 1.

802, processing unit 1 sends session establishment request to SMF equipment, and SMF equipment receives session establishment request.

The first：Session establishment request includes the second interface information (N11 interface messages) of processing unit 1.

Second：Session establishment request includes the second interface information (N11 interface messages) of processing unit 1, processing list The instruction information of AMF equipment belonging to member 1.

The third：Session establishment request includes processing unit 1 second interface information (N11 interface messages), deletion refer to Show, the instruction information of AMF equipment belonging to processing unit 1.

It should be noted that the instruction information of AMF equipment can be AMF device ids, or the default road of AMF equipment By in the corresponding embodiments of Fig. 8, being illustrated so that the instruction information of AMF equipment is AMF device ids as an example.

803, the information preservation that SMF equipment carries in asking session establishment is in UE session contexts.

It is understood that in each realization method for the session establishment request that above-mentioned steps 802 describe, session establishment The second interface information of processing unit 1 can be all carried in request, because the processing unit for being currently UE services is processing unit 1, So SMF equipment need to be by the second interface information preservation of processing unit 1 in UE session contexts, in order to be in connection in UE When state, SMF equipment can be directly by the second interface information preserved in UE session contexts, to the processing list serviced for UE Member 1 sends downstream message.

In addition, if further including the instruction information of AMF equipment in session establishment request, SMF equipment is also needed AMF equipment Instruction information preservation in UE session contexts, equally, if further including deleting instruction in session establishment request, SMF sets It is stored in UE session contexts for also needing to delete instruction.

Above-mentioned steps 801 to step 803 is session establishment process, after completing session establishment, when UE enters idle shape When state, also need to execute the processing procedure that UE enters idle state.

804, RAN equipment sends first interface release message to processing unit 1, and processing unit 1 receives first interface release Message.

805, processing unit 1 discharges first interface according to first interface release message.

It is understood that after processing unit 1 discharges the first interface between processing unit 1 and RAN, UE is by connection status It is switched to idle state.

806, processing unit 1 sends first interface release message to SMF equipment, and SMF equipment receives first interface release and disappears Breath.

It should be noted that corresponding to step 802, first interface release message also includes three kinds of realization methods.

The first：If session establishment request is the first realization method described in step 802, first interface release disappears The instruction information for deleting the AMF groups belonging to instruction, processing unit 1, first interface release notice can be carried in breath.

Second：If session establishment request is second of realization method described in step 802, first interface release disappears Deletion instruction, first interface release notice can be carried in breath.

The third：If session establishment request is the third realization method described in step 802, first interface release disappears First interface release notice can be carried in breath.

It should be noted that if processing unit 1 will carry deletion instruction in first interface release message, need to first judge certainly Manage whether unit is supported statelessly everywhere in AMF equipment belonging to body, if managing unit everywhere in AMF equipment supports stateless, place Instruction carrying can will be deleted in first interface release message by managing unit 1, and in conjunction with Fig. 3, reason unit is supported everywhere in AMF equipment Refer to statelessly not preserving UE session context informations in each processing unit, above and below the session of the UE of each processing unit service Literary information is maintained in DB, and the processing unit in same AMF equipment can share the UE session context informations stored in DB.

807, SMF equipment indicates to delete in UE sessions in the case where receiving first interface release message according to deleting Second interface information hereinafter.

SMF equipment receives first interface release message, illustrates that UE comes into idle state, and SMF equipment is deleted at this time Second interface information in UE session contexts, can be to avoid when the UE reenters linking status, and SMF equipment is still according to UE Second interface information in session context is by processing unit 1 as the processing unit serviced for UE.At this time due in UE sessions Second interface information is hereinafter not present, can only just be chosen for the processing unit of UE services again in SMF equipment, avoid one Directly serviced for UE by the same processing unit.

Above-mentioned steps 804 are to the processing procedure that step 807 is that UE enters idle state, if follow-up SMF equipment receives For the downstream message of the UE, then also needs to execute following steps 808 to step 811, UE is made to reenter connection status.

808, when SMF equipment needs to send downstream message, SMF equipment selects the ASF of AMF equipment according to AMF device ids Unit.

Wherein, SMF equipment can search pair of AMF equipment according to AMF device ids from NRF equipment or other equipment External tapping, the interface can be the transport layer information of ASF units.In the present embodiment, ASF units can be in AMF equipment One LB unit a, or processing unit in AMF equipment.

In the case where ASF units are a processing unit in AMF equipment, SMF equipment can be directly by downstream message It is sent to the processing unit, service is provided for UE by the processing unit, alternatively, the processing unit receives the transmission of SMF equipment After downstream message, following steps 810 can also be executed to step 811, reselect the processing unit serviced for UE, and by downlink Message is sent to the processing unit chosen again.

809, SMF equipment sends downstream message to ASF units, and ASF units receive downstream message.

It should be noted that when ASF units are LB units, step 810 can also be executed to 811.

810, ASF Unit selections are the processing unit of UE services, for example, processing unit 2.

811, ASF units send downstream message to processing unit 2, and processing unit 2 receives downstream message.

In alternatively possible realization method, ASF units can also send the mark of processing unit 2 to SMF equipment, by SMF equipment sends downstream message according to the mark of processing unit 2 to processing unit 2.

Wherein, processing unit 2 receives the flow and prior art phase of the subsequent processing downstream message after downstream message Together, details are not described herein again.

It should be noted that in subsequent flow, after UE reenters connection status, step can also be performed 812 to 813.

812, processing unit 2 sends response message to SMF equipment, response message include processing unit 2 and SMF equipment it Between interface message, SMF equipment receive response message.

813, the interface message between processing unit 2 and SMF equipment is stored in UE session contexts by SMF equipment.

The method for the message transmission that embodiments herein provides, due in RAN release RAN and the processing list for UE services After interface between member, SMF equipment can delete the SMF equipment in UE contexts and the interface between the processing unit of UE services It removes, and then when SMF equipment needs to send downstream message, it is necessary to which retriggered selects the process of processing unit, may be implemented Load balancing between processing unit.

It is above-mentioned that mainly scheme provided in an embodiment of the present invention is described from the angle of SMF equipment.It is appreciated that It is to contain to execute the corresponding hardware configuration of each function and/or software module in SMF equipment.Those skilled in the art should It is readily appreciated that, unit and algorithm steps described in conjunction with the examples disclosed in the embodiments of the present disclosure, the application can It is realized with the combining form of hardware or hardware and computer software.Some function is driven with hardware or computer software actually The mode of hardware executes, and depends on the specific application and design constraint of technical solution.Professional technician can be to every A specific application uses different methods to achieve the described function, but this realizes it is not considered that beyond the present invention's Range.

Embodiments herein can carry out SMF equipment according to the above method example division of function module, for example, can Each function module is divided with each function of correspondence, two or more functions can also be integrated in a processing module In.The form that hardware had both may be used in above-mentioned integrated module is realized, can also be realized in the form of software function module.It needs It is noted that be schematical, only a kind of division of logic function to the division of module in embodiments herein, it is practical There may be another division manner when realization.

In the case where dividing each function module using corresponding each function, embodiments herein provides a kind of message The device of transmission, the device can be implemented as the SMF equipment in above-described embodiment.As shown in figure 9, Fig. 9 shows above-mentioned implementation A kind of possible structural schematic diagram of involved SMF equipment in example.The SMF equipment includes：Receiving module 901, removing module 902, sending module 903.

Wherein, receiving module 901, the finger for receiving deletion instruction and the affiliated group of the first equipment from the first equipment Show information, deletes instruction and be used to indicate removing module 902 when receiving module 901 receives first interface release message, delete Second interface information in user equipment (UE) session context.

Removing module 902, in the case where receiving module 901 receives first interface release message, according to deletion It indicates to delete the second interface information in UE session contexts.

Sending module 903, for when needing to send downstream message, downstream message to be sent to the second equipment.

In the alternatively possible realization method of the embodiment of the present application, which further includes：Memory module 904.

Receiving module 901, is specifically used for receiving the session establishment request from the first equipment, and session establishment request includes The instruction information of group deletes instruction and second interface information.

Memory module 904 is used for the instruction information of group, deletes instruction and second interface information preservation in UE sessions In context.

Removing module 902, specifically for receiving the first interface release message that the first equipment is sent in receiving module In the case of, it is indicated according to the deletion in UE session contexts, deletes the second interface information in UE session contexts.

In the alternatively possible realization method of the embodiment of the present application, receiving module 901 is specifically used for receiving from the The session establishment of one equipment is asked, and session establishment request includes the instruction information and second interface information of group；And it receives First interface release message from the first equipment, first interface release message include deleting instruction.

Memory module 904 is used for the instruction information of group and second interface information preservation in UE session contexts.

In the alternatively possible realization method of the embodiment of the present application, receiving module 901 is specifically used for receiving from institute The session establishment request of the first equipment is stated, session establishment request includes second interface information；And it receives and comes from the first equipment First interface release message, first interface release message include group instruction information and delete indicate.

Memory module 904 is used for second interface information preservation in UE session contexts.

Removing module 902 deletes the session of UE specifically for the deletion instruction for including according to first interface release message Second interface information in context.

In the alternatively possible realization method of the embodiment of the present application, the instruction information of group is the group identities of group Identify ID；

It is corresponding, sending module 903, specifically for being determined as the second equipment of UE services according to the group ID；Pass through Interface between the device and the second equipment of message transmission sends downstream message to the second equipment.

In the alternatively possible realization method of the embodiment of the present application, the instruction information of group is the default road of group By；

Sending module 903 is specifically used for working as equipment transmission downstream message corresponding to the default route of group；Reception comes from Second device identification of the corresponding equipment of default route of group, the second equipment are that the corresponding equipment of default route of group is UE Second equipment of selection；Interface between the device transmitted by message and the second equipment, second received to receiving module Corresponding second equipment of device identification sends downstream message.

Sending module 903 sends downlink to the second equipment specifically for the corresponding equipment of default route by group and disappears Breath, the second equipment are that the corresponding equipment of default route of group is the second equipment of UE selections.

In addition, memory module 904 passes message after for receiving the message from the second equipment when receiving module 901 Interface message between defeated device and the second equipment is stored in UE session contexts.

Specifically, corresponding above method embodiment, receiving module 901 is for supporting SMF equipment to receive the step in Fig. 6 The 602 session establishment requests sent, the first interface release message that step 606 is sent, the response message that step 610 is sent, with And the first interface release message that step 702 is sent in Fig. 7, the first interface release message that step 706 is sent, step 711 hair The response message sent is additionally operable to that SMF equipment is supported to receive the session establishment request that step 802 is sent in Fig. 8, and step 806 is sent First interface release message and step 812 send response message.Removing module 903, for supporting SMF equipment to execute Step 607 in Fig. 6, the step 707 in Fig. 7 and the step 807 in Fig. 8.Sending module 903, for supporting SMF equipment Execute the step 609 in Fig. 6, the step 708 in Fig. 7 and the step 809 in Fig. 8.Memory module 904, for supporting SMF Equipment executes step 603 and step 611 in Fig. 6, step 703 and step 712 in Fig. 7, step 803 and step in Fig. 8 813。

Wherein, all related contents for each step that above method embodiment is related to can quote corresponding function module Function describes, and details are not described herein.

Using integrated unit, it should be noted that receiving module 901 and sending module shown in Fig. 9 903, it can be integrated in communication interface 503 shown in fig. 5, communication interface 503 is made to execute receiving module 901 and sending module 903 concrete function.Removing module 902 can integrate in processor 502 shown in Fig. 5, and processor 502 is made to execute removing module 902 concrete function.Memory module 904 can be integrated in memory 501 shown in fig. 5, memory 501 is made to execute storage The concrete function of module 904.

As shown in Figure 10, in order to solve the problems, such as load imbalance in the prior art, another embodiment of the application provides A kind of method of data transmission is set when in scene of this method applied to Fig. 4 with UE, RAN equipment, AMF examples and SMF It is illustrated for interaction flow between standby, wherein AMF examples 1 and AMF examples 2 belong to the same AMF groups, this method Including three phases, the first stage is session establishment process, corresponding step 1001 to step 1003；Second stage is that UE enters sky The processing procedure of not busy state, corresponding step 1004 to step 1007；When phase III is that SMF equipment needs to send downstream message, UE reenters the process of connection status, corresponding step 1008 to step 1009.This method specifically includes：

1001, UE sends session establishment request to AMF examples 1, and AMF examples 1 receive session establishment request.

Wherein, it is in order to trigger the process of PDU session establishments, when UE is initiated that UE sends session establishment request to AMF examples 1 When the process of PDU session establishments, UE is in connection status, at this time for UE service be AMF examples 1.

1002, AMF examples 1 send session establishment request to SMF equipment, and AMF examples 1 receive session establishment request.

The first：Session establishment request includes the information of AMF examples 1.

Wherein, the information of AMF examples 1 addresses AMF examples for SMF equipment, for example, the information of AMF examples 1 can be In AMF instance identifications, AMF examples business end uniform resource identifier (uniform resource identifier, ) or the resource identification etc. registered in NRF equipment of AMF examples URI.

Second：Session establishment request includes that the instruction of the information of AMF examples 1, AMF groups belonging to AMF examples 1 is believed Breath.

The third：Session establishment request includes 1 information of AMF examples, statelessly indicates information, belonging to AMF examples 1 The instruction information of AMF groups.

It should be noted that the instruction information of AMF groups can be AMF groups ID, or the default road of AMF groups By.It is illustrated so that the instruction information of AMF groups is AMF groups ID as an example in the corresponding embodiments of Fig. 9.

It should be noted that according to the third above-mentioned realization method, AMF examples 1 need to first judge the AMF groups belonging to itself Whether group supports stateless mode, if AMF community supporting stateless modes, AMF examples 1 just will can statelessly indicate that information carries In session establishment request.Wherein, in conjunction with Fig. 4, AMF community supporting stateless modes refer to that AMF is real when UE is in Idle state Example does not preserve UE session context informations, the session context information of the UE of the Idle state of each AMF examples service in AMF groups It is saved in the DB of AMF groups, each AMF examples in same AMF groups can be shared in the UE sessions stored in DB Context information, AMF examples each in this way can not only handle the relevant information for the UE that own services are crossed, can also handle other UE Relevant information.

Wherein, statelessly instruction information is used to indicate SMF equipment and is determining the corresponding signaling connections of UE and first interface After binding release, if SMF equipment needs to send downstream message to AMF examples, SMF equipment need to be according to the instruction information of AMF groups AMF examples are reselected from AMF groups, and downstream message is sent to the AMF examples newly selected.

Stateless instruction information can be an individually instruction information, come for example, carrying a bit in the message Indicate AMF group works in stateless mode, can also be embody in other ways, for example, carry in the message it is special AMF pointers come indicate AMF group works stateless mode (for example, if the AMF pointer marks carried in message be 1111 if table Show the AMF group works in stateless mode).

The binding release of signaling connection and first interface includes but not limited to following two situations：

In the concrete realization, the signaling in signaling connection can refer to next-generation application protocol (Next Generation Application protocol, NGAP) signaling, the application protocol (N2reference of N2 interfaces can also be referred to Application protocol, N2AP).

It should be noted that other than above-mentioned acquisition statelessly indicates the method for information, SMF can also be according to AMF groups Instruction information obtain above-mentioned stateless instruction information from being locally configured in information.

1003, the information preservation that SMF equipment carries in asking session establishment is in UE session contexts.

It is understood that in each realization method for the session establishment request that above-mentioned steps 1002 describe, session is built The information of AMF examples 1 can be all carried in vertical request, because the AMF examples for being currently UE services are AMF examples 1, SMF is set It is standby need to be by the information preservation of AMF examples 1 in UE session contexts, in order to when UE is in connection status, SMF equipment can be with Directly by the information of the AMF examples 1 preserved in UE session contexts, downstream message is sent to the AMF examples 1 serviced for UE.

In addition, if further including the instruction information of AMF groups in session establishment request, SMF equipment is also needed AMF groups Instruction information preservation in UE session contexts.Optionally, if in session establishment request further including stateless instruction information, Then SMF equipment also need will stateless instruction information preservation in UE session contexts, or optionally, SMF equipment can will be ill-mannered State indicates information preservation in AMF groups or the corresponding contexts of AMF.

Above-mentioned steps 1001 to step 1003 is session establishment process, after completing session establishment, when UE enters the free time When state, also need to execute the processing procedure that UE enters idle state.

1004, RAN equipment sends release message to AMF examples 1, and AMF examples 1 receive release message.

Wherein, release message is used to indicate the binding that AMF examples 1 discharge UE corresponding signaling connection and first interface.

1005,1 equipment of AMF examples discharges the binding of UE corresponding signaling connection and first interface according to release message.

It is connect with first it is understood that AMF examples 1 discharge the corresponding signaling connections of the UE between AMF examples 1 and RAN After the binding of mouth, UE is switched to idle state by connection status.

1006, AMF examples 1 send session updates request or release notice to SMF equipment, and session updates request includes Release cause, SMF equipment receive session updates request or release notice.

Wherein, release cause is used to indicate the reason of binding of the corresponding signaling connections of UE and first interface discharges.Release Notice is for indicating that the binding of the corresponding signaling connections of UE and first interface has discharged.

It should be noted that corresponding to step 1002, session updates request message also includes three kinds of realization methods.

The first：If session establishment request is the first realization method described in step 1002, session updates request In can carry the instruction information and release cause of AMF groups belonging to AMF examples 1.May be used also in optional session updates request To carry stateless instruction information.

Second：If session establishment request is second of realization method described in step 1002, session updates request In can carry release cause.Stateless instruction information can also be carried in optional session updates request.

The third：If session establishment request is the third realization method described in step 1002, session updates request Release cause can be carried in message.

It should be noted that if AMF examples 1 will carry stateless instruction information in session updates request message, elder generation is needed Judge whether the AMF groups belonging to itself support stateless mode, if AMF community supporting stateless modes, AMF examples 1 just can It will statelessly indicate that information carries in session updates request.

Similarly, release notice also includes three of the above realization method.

It should be noted that this step, in addition to AMF examples 1 send session updates request to SMF equipment or discharge logical Know, and ask or carry release cause in session updates, AMF examples 1 may also send UE to SMF equipment and enter Idle state Notice.Similarly, also include above-mentioned three kinds of realization methods into Idle state notice.

1007, SMF equipment enters Idle state according to release cause, release notice or UE and notifies to judge the corresponding signalings of UE Connection and the binding of first interface discharge.

In one implementation, SMF equipment is according to the AMF examples in stateless instruction information deletion UE session contexts 1 information.

Wherein, if carrying stateless instruction information in session updates request message, SMF equipment is directly according to session updates The information of AMF examples 1 in the stateless instruction information deletion UE session contexts carried in request.If session updates request disappears Stateless instruction information is not carried in breath, and saves stateless instruction information in UE session contexts, then SMF equipment is according to UE The information of the stateless instruction information deletion AMF examples 1 preserved in session context.In addition to this, SMF equipment can also according to The information for setting AMF groups statelessly indicates information from acquisition in information is locally configured, and ill-mannered in information according to being locally configured State indicates the information of information deletion AMF strength 1.

SMF equipment is logical according to receiving session updates request or release notice or entering Idle state according to the UE received Know, judge that UE comes into idle state, SMF equipment deletes the information of the AMF examples 1 in UE session contexts at this time, can be with Avoid when the UE reenters connection status, SMF equipment still according to the AMF examples 1 in UE session contexts information by AMF Example 1 is as the AMF examples serviced for UE.At this time due to the information there is no AMF examples 1 in UE session contexts, just can only It is chosen for the AMF examples of UE services again in AMF groups, avoids and serviced for UE by the same AMF examples always.

In another realization method, SMF equipment does not delete the information of AMF examples 1 in step 1007, and SMF is set Standby basis receives session updates request or release notice or enters Idle state notice according to the UE received, judges UE Into idle state, SMF equipment sets connection management (Connection Management, CM) state of UE to Idle state.

Above-mentioned steps 1004 are to the processing procedure that step 1007 is that UE enters idle state, if follow-up SMF equipment receives To the downstream message for the UE, then also needs to execute following steps 1008 to step 1009, UE is made to reenter connection status.

1008, when SMF equipment needs to send downstream message, SMF equipment is selected according to AMF groups ID from AMF groups For the AMF examples of UE services, for example, AMF examples 2.

Optionally, when SMF equipment needs to send downstream message, the corresponding signaling connections of UE and first interface be can determine whether Whether binding discharges, however, it is determined that and the binding of the corresponding signaling connections of UE and first interface has discharged, then according to AMF groups ID, from The AMF examples of UE services are selected as in AMF groups.

In one implementation, SMF equipment queries UE session contexts, if any without preserving in UE session contexts The information of AMF examples, then SMF equipment according to AMF groups ID be selected as UE service AMF examples.

In another implementation, SMF equipment judges the CM states of UE for Idle state, also, SMF equipment has received and AMF groups are determined according to configuration from the stateless instruction information of AMF examples 1 (such as step 1001 either 1006) or SMF equipment It is operated in stateless mode, then, even if saving AMF example informations in UE session contexts, SMF equipment is according further to AMF groups Group ID is selected as the AMF examples of UE services.

SMF equipment can preserve AMF examples after reselecting the AMF examples 2 serviced for UE in UE session contexts 2 information, in order to which in the case where the UE is constantly in connection status, SMF equipment is directly communicated with AMF examples 2, nothing AMF examples need to be reselected.

1009, SMF equipment sends downstream message to AMF examples 2, and AMF examples 2 receive downstream message.

Embodiments herein provide message transmission method, compared with the prior art in SMF equipment always select The secondary AMF examples for UE services provide service for UE, in embodiments herein, in the RAN release RAN and AMF for UE services When the binding of the interface signaling corresponding with UE between example, illustrate that UE enters idle state, SMF equipment can will be in UE contexts AMF examples information deletion, and then when SMF equipment need send for the UE downstream message when, just can not be directly from UE The information that the last AMF examples for being UE services are searched in context, it is real would not to continue the AMF for selecting last time to be serviced for UE Example, but go to reselect AMF examples, SMF equipment is avoided in this way, and last time was always selected to be led for the AMF examples that UE is serviced The phenomenon that load imbalance of cause, occurs.

In the case where dividing each function module using corresponding each function, embodiments herein provides a kind of message The device of transmission, the device can be implemented as the SMF equipment in above-described embodiment.As shown in figure 11, Figure 11 shows above-mentioned reality Apply the alternatively possible structural schematic diagram of SMF equipment involved in example.The SMF equipment includes：Acquisition module 1101 and hair Send module 1102.

Acquisition module 1101, the group for obtaining stateless instruction information and the affiliated group of the first equipment indicate information, Stateless instruction information is used to indicate to be needed after the binding release for determining the corresponding signaling connection of user equipment (UE) and first interface When sending downstream message, indicate that information selects the second equipment for being serviced for UE, the first equipment to connect for signaling according to group The equipment serviced for UE before the binding release with first interface is connect, first interface is wireless access network RAN and the first equipment room Interface.

Sending module 1102, in the case of for receiving the release notice from the first equipment in acquisition module 1101, When needing to send downstream message, downstream message is sent to the second equipment, the second equipment is to indicate what information determined according to group Equipment for being serviced for UE.Wherein, release notice is for indicating that the binding of the corresponding signaling connections of UE and first interface has been released It puts.

In the alternatively possible realization method of the embodiment of the present application, which further includes determining module 1103.

Determining module 1103, for determining that the binding of the corresponding signaling connections of UE and first interface discharges.

In the alternatively possible realization method of the embodiment of the present application, determining module 1103, if being additionally operable to sending module It needs to send downstream message, and determining module 1103 determines that the binding of the corresponding signaling connections of UE and first interface discharges, then root It is determined for the second equipment for UE services according to group's instruction information.

In the alternatively possible realization method of the embodiment of the present application, acquisition module 1101 comes from specifically for receiving The session establishment of first equipment is asked, and session establishment request includes group's instruction information；It is set from first alternatively, receiving Standby release notice, release notice include group's instruction information.

In the alternatively possible realization method of the embodiment of the present application, acquisition module 1101 comes from specifically for receiving The session establishment of first equipment is asked, and session establishment request includes stateless instruction information；The first equipment is come from alternatively, receiving Release notice, release notice kind includes stateless instruction information；Alternatively, obtaining stateless instruction letter from being locally configured in information Breath.

In the alternatively possible realization method of the embodiment of the present application, which further includes removing module 1104.

Removing module 1104, after receiving the release notice from the first equipment in acquisition module 1101, according to nothing Status indication information deletes the information of the first equipment in UE session contexts.

In the alternatively possible realization method of the embodiment of the present application, which further includes：Memory module 1105.

Memory module 1105 preserves letter after receiving the release notice from the first equipment in acquisition module 1101 Enable the release conditions of connection and the binding of first interface.

Optionally it is determined that module 1103, is additionally operable to be determined according to the release conditions of the binding of signaling connection and first interface The binding of signaling connection and first interface has discharged；

Further, it is determined that module 1103, needs to send downstream message, and determining module if being additionally operable to sending module 1102 1103 determine that the binding of signaling connection and first interface has discharged according to the release conditions of the binding of signaling connection and first interface, Then indicate that information is determined for the second equipment for UE services according to group.

Wherein, group's instruction information is that the group identities of the affiliated group of the first equipment identify ID；

Determining module 1103, if needing to send downstream message, and determining module 1103 specifically for sending module 1102 Determine that the binding of signaling connection and first interface has discharged according to the release conditions of the binding of signaling connection and first interface, then basis Group ID is determined as the second equipment of UE services.

Specifically, corresponding above method embodiment, acquisition module 1101 is for supporting SMF equipment to obtain the step in Figure 10 The 1002 session establishment requests sent, the first interface release message that step 1006 is sent.Sending module 1102, for supporting SMF equipment executes the step 1009 in Figure 10.Removing module 1104, for supporting SMF equipment to execute the step 1007 in Figure 10. Determining module 1103, for supporting SMF equipment to execute the step 1008 in Figure 10.Memory module 1105, for supporting SMF equipment Execute the step 1003 in Figure 10.

Using integrated unit, it should be noted that acquisition module 1101 shown in Figure 11 and transmission mould Block 1102 can be integrated in communication interface 503 shown in fig. 5, so that communication interface 503 is executed acquisition module 1101 and sent mould The concrete function of block 1102.Determining module 1103 and removing module 1104 can integrate in processor 502 shown in Fig. 5, make place Manage the concrete function that device 502 executes determining module 1103 and removing module 1104.Memory module 1105 can be integrated in Fig. 5 institutes In the memory 501 shown, memory 501 is made to execute the concrete function of memory module 1105.

Embodiments herein additionally provides a kind of computer storage media, for being stored as used in above-mentioned SMF equipment Computer software instructions, device include the program designed for executing the step of SMF equipment executes in above-described embodiment.

Embodiments herein additionally provides a kind of computer program product, such as computer readable storage medium, including The program designed for executing the step of SMF equipment executes in above-described embodiment.

The step of method in conjunction with described in present disclosure or algorithm, can be realized in a manner of hardware, also may be used It is realized in a manner of being to execute software instruction by processor.Software instruction can be made of corresponding software module, software mould Block can be stored on random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read Only Memory, ROM), Erasable Programmable Read Only Memory EPROM (Erasable Programmable ROM, EPROM), electricity can Erasable programmable read-only memory (Electrically EPROM, EEPROM), register, hard disk, mobile hard disk, CD-ROM (CD-ROM) or in the storage medium of any other form well known in the art.A kind of illustrative storage medium is coupled to place Device is managed, to enable a processor to from the read information, and information can be written to the storage medium.Certainly, it stores Medium can also be the component part of processor.Pocessor and storage media can be located in ASIC.In addition, the ASIC can position In core network interface equipment.Certainly, pocessor and storage media, which can also be used as discrete assembly and be present in core network interface, sets In standby.

In several embodiments provided herein, it should be understood that disclosed system, device and method 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 division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component 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 the indirect coupling by some interfaces, device or unit It closes or communicates to connect, can be electrical or other forms.

The unit illustrated as separating component may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple On the network equipment.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme 's.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also It is that each functional unit is individually present, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list The form that hardware had both may be used in member is realized, can also be realized in the form of hardware adds SFU software functional unit.

Through the above description of the embodiments, it is apparent to those skilled in the art that the application can borrow Help software that the mode of required common hardware is added to realize, naturally it is also possible to which by hardware, but the former is more preferably in many cases Embodiment.Based on this understanding, the portion that the technical solution of the application substantially in other words contributes to the prior art Dividing can be expressed in the form of software products, which is stored in the storage medium that can be read, and such as count The floppy disk of calculation machine, hard disk or CD etc., including some instructions are used so that computer equipment (can be personal computer, Server or the network equipment etc.) execute each embodiment of the application described in method.

The above, the only specific implementation mode of the application, but the protection domain of the application is not limited thereto, at this Apply for the change or replacement in the technical scope disclosed, should all cover within the protection domain of the application.Therefore, the application Protection domain should be based on the protection scope of the described claims.

Claims

1. a kind of method of message transmission, which is characterized in that including：

Conversation management functional equipment receives the instruction of the group belonging to deletion instruction and first equipment from the first equipment Information, the deletion instruction are used to indicate the conversation management functional equipment when receiving first interface release message, delete and use Second interface information in the equipment UE session context of family, the first interface are wireless access network RAN and first equipment Between interface, the second interface be first equipment and the conversation management functional equipment room interface；

In the case where the conversation management functional equipment receives the first interface release message from first equipment, institute Conversation management functional equipment is stated according to the second interface information deleted in the instruction deletion UE session contexts；

When the conversation management functional equipment needs to send downstream message, the conversation management functional equipment is sent out to the second equipment It is to be used to be setting for the UE services according to what the instruction information of the group determined to send the downstream message, second equipment It is standby.

2. according to the method described in claim 1, it is characterized in that, the conversation management functional equipment, which receives, comes from the first equipment Deletion instruction and first equipment belonging to group instruction information, including：

The conversation management functional equipment receives the session establishment request from first equipment, in the session establishment request Instruction information, deletion instruction including the group and the second interface information；

After the conversation management functional equipment receives the session establishment request from first equipment, the method is also wrapped It includes：

The conversation management functional equipment is by the instruction information of the group, and the deletion indicates and the second interface information It is stored in the UE session contexts.

3. according to the method described in claim 2, it is characterized in that, the conversation management functional equipment is indicated according to the deletion The second interface information in the UE session contexts is deleted, including：

The conversation management functional equipment is indicated according to the deletion in the UE session contexts, is deleted in the UE sessions Second interface information hereinafter.

4. according to the method described in claim 1, it is characterized in that, the conversation management functional equipment, which receives, comes from the first equipment Deletion instruction and first equipment belonging to group instruction information, including：

The conversation management functional equipment receives the session establishment request from first equipment, in the session establishment request Instruction information including the group and the second interface information；

The conversation management functional equipment receives the first interface release message from first equipment, and the first interface is released It includes the deletion instruction to put message；

The conversation management functional equipment is by the instruction information of the group and the second interface information preservation in the UE meetings It talks about in context.

5. according to the method described in claim 1, it is characterized in that, the conversation management functional equipment, which receives, comes from the first equipment Deletion instruction and first equipment belonging to group instruction information, including：

The conversation management functional equipment receives the first interface release message from first equipment, and the first interface is released Put the instruction information and deletion instruction that message includes the group；

Before the conversation management functional equipment receives the first interface release message from first equipment, the method Further include：

The conversation management functional equipment receives the session establishment request from first equipment, in the session establishment request Including the second interface information；

The conversation management functional equipment is by the second interface information preservation in the UE session contexts.

6. method according to claim 4 or 5, which is characterized in that the conversation management functional equipment is according to the deletion It indicates to delete the second interface information in the UE session contexts, including：

Described in the deletion instruction that the conversation management functional equipment includes according to the first interface release message is deleted Second interface information in the session context of UE.

7. according to the method described in claim 1, it is characterized in that, the instruction information of the group is group's body of the group Part mark ID；Correspondingly, the conversation management functional equipment sends the downstream message to the second equipment, including：

The conversation management functional equipment is determined as the second equipment of the UE services according to the group ID；

The conversation management functional equipment is by the interface between the conversation management functional equipment and second equipment to institute It states the second equipment and sends the downstream message.

8. according to the method described in claim 1, it is characterized in that, the instruction information of the group is the default road of the group By；Correspondingly, the conversation management functional equipment sends the downstream message to the second equipment, including：

When the conversation management functional equipment needs to send downstream message, the conversation management functional equipment is to the group The corresponding equipment of default route sends the downstream message；

The conversation management functional equipment receives the second device identification of the corresponding equipment of default route from the group, institute State the second equipment that the corresponding equipment of default route that the second equipment is the group is the UE selections；

The conversation management functional equipment is by the interface between the conversation management functional equipment and second equipment, to institute It states corresponding second equipment of the second device identification and sends the downstream message.

9. according to the method described in claim 1, it is characterized in that, the instruction information of the group is the default road of the group By；Correspondingly, the conversation management functional equipment sends the downstream message to the second equipment, including：

When the conversation management functional equipment needs to send downstream message, the conversation management functional equipment passes through the group The corresponding equipment of default route send the downstream message to second equipment, second equipment is lacking for the group Save the second equipment for routeing that corresponding equipment is UE selections.

10. the method according to any one of claim 7 to 9, which is characterized in that logical in the conversation management functional equipment It crosses after the corresponding equipment of default route of the group sends the downstream message to second equipment, the method is also wrapped It includes：

After the conversation management functional equipment receives the message from second equipment, the conversation management functional equipment Interface message between the conversation management functional equipment and second equipment is stored in the UE session contexts.

11. a kind of device of message transmission, which is characterized in that including：

Receiving module, the instruction letter for receiving the group belonging to deletion instruction and first equipment from the first equipment Breath, the deletion instruction are used to indicate removing module when the receiving module receives first interface release message, delete and use Second interface information in the equipment UE session context of family, the first interface are wireless access network RAN and first equipment Between interface, the second interface is the interface between the device that first equipment and the message are transmitted；

The removing module, for receiving the first interface release message from first equipment in the receiving module In the case of, according to the second interface information deleted in the instruction deletion UE session contexts；

Sending module, for when needing to send downstream message, the downstream message, second equipment to be sent to the second equipment For the equipment for being the UE services determined according to the instruction information of the group.

12. according to the devices described in claim 11, which is characterized in that described device further includes：Memory module；

The receiving module is specifically used for receiving the session establishment request from first equipment, the session establishment request Include instruction information, deletion instruction and the second interface information of the group；

The memory module, for by the instruction information of the group, the deletion instruction and the second interface information to be protected There are in the UE session contexts.

13. device according to claim 12, which is characterized in that

The removing module disappears specifically for receiving the first interface release that first equipment is sent in the receiving module In the case of breath, is indicated according to the deletion in the UE session contexts, delete second in the UE session contexts Interface message.

14. according to the devices described in claim 11, which is characterized in that described device further includes：Memory module；

The receiving module is specifically used for receiving the session establishment request from first equipment, the session establishment request Include the instruction information of the group and the second interface information；And receive the first interface from first equipment Release message, the first interface release message include the deletion instruction；

The memory module is used for the instruction information of the group and the second interface information preservation in the UE sessions Hereinafter.

15. according to the devices described in claim 11, which is characterized in that described device further includes：Memory module；

The receiving module is specifically used for receiving the first interface release message from first equipment, the first interface Release message includes instruction information and the deletion instruction of the group；And receive the session from first equipment Request is established, the session establishment request includes the second interface information；

The memory module is used for the second interface information preservation in the UE session contexts.

16. the device according to claims 14 or 15, which is characterized in that

The removing module is indicated specifically for the deletion for including according to the first interface release message described in deletion Second interface information in the session context of UE.

17. according to the devices described in claim 11, which is characterized in that the instruction information of the group is the group of the group Identity ID；

The sending module, specifically for being determined as the second equipment of the UE services according to the group ID；Disappeared by described The interface ceased between the device and second equipment of transmission sends the downstream message to second equipment.

18. according to the devices described in claim 11, which is characterized in that the instruction information of the group is the default of the group Routing；

The sending module is specifically used for sending the downstream message to the corresponding equipment of the default route of the group；It receives Second device identification of the corresponding equipment of default route from the group, second equipment are the default road of the group By the second equipment that corresponding equipment is UE selections；Between the device transmitted by the message and second equipment Interface, corresponding second equipment of the second device identification received to the receiving module send the downstream message.

19. according to the devices described in claim 11, which is characterized in that the instruction information of the group is the default of the group Routing；

The sending module is specifically used for sending institute to second equipment by the corresponding equipment of default route of the group Downstream message is stated, second equipment is the second equipment that the corresponding equipment of default route of the group is the UE selections.

20. the device according to any one of claim 17 to 19, which is characterized in that described device further includes：Store mould Block；

The memory module, after for receiving the message from second equipment when the receiving module, by the message Interface message between the device of transmission and second equipment is stored in the UE session contexts.

21. a kind of method of message transmission, which is characterized in that including：

Conversation management functional equipment obtains stateless instruction information and the group of the affiliated group of the first equipment indicates information, the nothing Status indication information is used to indicate the conversation management functional equipment and is determining the corresponding signaling connection of user equipment (UE) and first When needing to send downstream message after the binding release of interface, indicate that information select to be used to service for the UE according to the group Second equipment, first equipment be the signaling connection and the first interface binding release before be setting for the UE services Standby, the first interface is the interface of wireless access network RAN and first equipment room；

In the case where the conversation management functional equipment receives the notice of the release from first equipment, when the session When management function equipment needs to send downstream message, the conversation management functional equipment sends the downlink to the second equipment and disappears Breath, second equipment are that the equipment for being the UE services of information determination is indicated according to the group.

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

The conversation management functional equipment determines that the binding of the corresponding signaling connections of the UE and first interface discharges.

23. the method according to claim 21 or 22, which is characterized in that the conversation management functional equipment obtains first and sets The group of standby affiliated group indicates information, including：

The conversation management functional equipment receives the session establishment request from first equipment, in the session establishment request Information is indicated including the group；Alternatively,

The conversation management functional equipment receives the release notice from first equipment, and the release notice includes The group indicates information.

24. the method according to claim 21 or 22, which is characterized in that the conversation management functional equipment obtains stateless Indicate information, including：

The conversation management functional equipment receives the session establishment request from first equipment, in the session establishment request Including the stateless instruction information；Alternatively,

The conversation management functional equipment receives the release notice from first equipment, and the release notice includes The stateless instruction information；Alternatively,

The conversation management functional equipment obtains the stateless instruction information from being locally configured in information.

25. the method according to claim 21 or 22, which is characterized in that group's instruction information is first equipment The group identities of affiliated group identify ID；Correspondingly, the method further includes：

If the conversation management functional equipment needs to send downstream message, and the conversation management functional equipment determines that UE is corresponding The binding of signaling connection and first interface discharges, then the conversation management functional equipment is determined as the UE according to the group ID Second equipment of service.

26. a kind of device of message transmission, which is characterized in that including：Acquisition module and sending module；

The acquisition module, the group for obtaining stateless instruction information and the affiliated group of the first equipment indicates information, described Stateless instruction information is used to indicate to be needed after the binding release for determining the corresponding signaling connection of user equipment (UE) and first interface When sending downstream message, indicate that information select to be used for the second equipment for being serviced for the UE according to the group, described first The equipment that equipment is the signaling connection with being the UE services before the binding release of the first interface, the first interface are The interface of wireless access network RAN and first equipment room；

The sending module, in the case of for receiving the release notice from first equipment in the acquisition module, When needing to send downstream message, the downstream message is sent to the second equipment, second equipment is to refer to according to the group Show the equipment for being serviced for the UE that information determines.

27. device according to claim 26, which is characterized in that described device further includes：Determining module；

The determining module, for determining that the binding of the corresponding signaling connections of UE and first interface discharges.

28. the device according to claim 26 or 27, which is characterized in that

The acquisition module is specifically used for receiving the session establishment request from first equipment, the session establishment request Include group's instruction information；Alternatively, receiving from notice is discharged described in first equipment, wrapped in the release notice Include group's instruction information.

29. the device according to claim 26 or 27, which is characterized in that

The acquisition module is specifically used for receiving the session establishment request from first equipment, the session establishment request Include the stateless instruction information；Alternatively, the release notice from first equipment is received, the release notice Include the stateless instruction information；Alternatively, obtaining the stateless instruction information from being locally configured in information.

30. the device according to claim 26 or 27, which is characterized in that group's instruction information is first equipment The group identities of affiliated group identify ID；

The determining module, if it needs to send downstream message specifically for the sending module, and the determining module determines UE The binding of corresponding signaling connection and first interface has discharged, then be determined as the UE services according to the group ID second sets It is standby.