CN105828315A - Method and system for selecting service gateway - Google Patents
Method and system for selecting service gateway Download PDFInfo
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- CN105828315A CN105828315A CN201610141227.7A CN201610141227A CN105828315A CN 105828315 A CN105828315 A CN 105828315A CN 201610141227 A CN201610141227 A CN 201610141227A CN 105828315 A CN105828315 A CN 105828315A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/06—Registration at serving network Location Register, VLR or user mobility server
- H04W8/065—Registration at serving network Location Register, VLR or user mobility server involving selection of the user mobility server
Abstract
The embodiment of the invention discloses a method and system for selecting a service gateway. A mobile management entity selects a proper service gateway control plane entity for user equipment; and the service gateway control plane entity selected by the mobile management entity selects a service gateway user plane entity for the user equipment. Therefore, effective operation of evolved packet core network architecture after separation of an SGW into an SGW-C entity and an SGW-U entity can be guaranteed.
Description
Technical field
The present invention relates to communication technical field, more particularly, it relates to a kind of gateway system of selection and
System.
Background technology
Along with the growth of user data transmission business, existing evolution block core net (Evolved Packet
Core, EPC) framework cannot meet user's request, and become and limit what user data transmission speed increased
Bottleneck, to this end, current 3GPP tissue is just considering to strengthen existing core network architecture, will service
Gateway (Serving Gateway, SGW) and PDN Gateway (Packet Data Network Gateway,
The function of control plane PGW) and the function of user level separate.Wherein, SGW is separated into two
Individual entity: gateway chain of command entity SGW-C and service gateway customer face entity SGW-U, wherein,
SGW-C is for realizing the chain of command function of former SGW, and SGW-U is for realizing the user face merit of former SGW
Energy.
In EPC core net framework, MME is needed to set up carrying, i.e. mobile management entity with gateway
(Mobility Management Entity, MME) is that user equipment (UE) selects SGW.SGW is separated into
After two entities of SGW-C and SGW-U, originally by mobile management entity be user equipment (UE) select SGW
Method the most applicable, and select this problem of SGW-C and SGW-U for how for UE, at present
The most do not come to a conclusion.
Summary of the invention
It is an object of the invention to provide a kind of gateway system of selection and system, to ensure that SGW is separated into
Effective operation of evolution block core net framework after two entities of SGW-C and SGW-U.
For achieving the above object, the technical scheme is that
A kind of gateway system of selection, including:
Mobile management entity is that destination service gateway control face entity chosen by subscriber equipment；
Described mobile management entity sends the first foundation carrying to described destination service gateway control face entity please
Ask；
Described destination service gateway control face entity sets up carrying request in response to described first, for described use
Family equipment chooses destination service gateway customer face entity；
Described destination service gateway control face entity sends second to described destination service gateway customer face entity
Set up carrying request.
Said method, it is preferred that described mobile management entity is that destination service gateway control chosen by subscriber equipment
Face processed entity includes:
Described mobile management entity obtain described subscriber equipment can the row of gateway chain of command entity
Table；
Weight is distributed for each gateway chain of command entity in described list；
The gateway chain of command entity that weight is maximum is defined as destination service gateway control face entity.
Said method, it is preferred that described mobile management entity obtain described subscriber equipment can service network
The list closing chain of command entity includes:
Described mobile management entity obtain the described subscriber equipment that determined by name server can service network
Close the list of chain of command entity.
Said method, it is preferred that described for each gateway chain of command entity distribution in described list
Weight includes:
The interface protocol type supported based on gateway chain of command entity, and gateway chain of command is real
The load state of body is each gateway chain of command entity distribution weight in described list.
Said method, it is preferred that the described interface protocol type supported based on gateway chain of command entity,
And the load state of gateway chain of command entity is that each gateway chain of command in described list is real
Body distribution weight includes:
If the interface protocol type that described gateway chain of command entity is supported and described user device transmissions
Business is not mated, or, the load state of described gateway chain of command entity exceedes preset load door
Limit value, then the weight for the distribution of described gateway chain of command entity is 0；
If the interface protocol type that described gateway chain of command entity is supported and described user device transmissions
Business is mated, and the load state of described gateway chain of command entity is not less than preset load-threshold value,
Then foundation the first formula is that described gateway chain of command entity distributes weight, and described first formula is:
wc=1/Lc+μc
Wherein, wcFor the weight of gateway chain of command entity c, LcFor gateway chain of command entity c's
Load capacity, μcFor the modifying factor corresponding with gateway chain of command entity c.
A kind of gateway selects system, including: mobile management entity, with described mobile management entity even
At least one the gateway chain of command entity connect, and real with at least one gateway chain of command described
Several gateway user entities that body connects；
Described mobile management entity is for setting for user from least one gateway chain of command entity described
The alternative destination service gateway control face entity that takes, and send the to described destination service gateway control face entity
One sets up carrying request；
Described gateway chain of command entity is for when receiving the first foundation carrying request, in response to institute
State the first foundation carrying request, be described subscriber equipment from several gateway user entities described
Choose destination service gateway customer face entity, send second to described destination service gateway customer face entity and build
Vertical carrying request.
Said system, it is preferred that setting for user from least one gateway chain of command entity described
The alternative aspect taking destination service gateway control face entity, described mobile management entity is used for,
Obtain described subscriber equipment can the list of gateway chain of command entity；For in described list
Each gateway chain of command entity distribution weight；The gateway chain of command entity that weight is maximum is determined
For destination service gateway control face entity.
Said system, it is preferred that obtain described subscriber equipment can gateway chain of command entity
The aspect of list, described mobile management entity is used for,
Obtain the described subscriber equipment that determined by name server can the row of gateway chain of command entity
Table.
Said system, it is preferred that for each gateway chain of command entity right of distribution in described list
The method of weight, described mobile management entity is used for,
The interface protocol type supported based on gateway chain of command entity, and gateway chain of command is real
The load state of body is each gateway chain of command entity distribution weight in described list.
Said system, it is preferred that at the interface protocol type supported based on gateway chain of command entity,
And the load state of gateway chain of command entity is that each gateway chain of command in described list is real
The aspect of body distribution weight, described mobile management entity is used for,
If the interface protocol type that described gateway chain of command entity is supported and described user device transmissions
Business is not mated, or, the load state of described gateway chain of command entity exceedes preset load door
Limit value, then the weight for the distribution of described gateway chain of command entity is 0；
If the interface protocol type that described gateway chain of command entity is supported and described user device transmissions
Business is mated, and the load state of described gateway chain of command entity is not less than preset load-threshold value,
Then foundation the first formula is that described gateway chain of command entity distributes weight, and described first formula is:
wc=1/Lc+μc
Wherein, wcFor the weight of gateway chain of command entity c, LcFor gateway chain of command entity c's
Load capacity, μcFor the modifying factor corresponding with gateway chain of command entity c.
By above scheme, gateway system of selection that the embodiment of the present invention provides and system, by
Mobile management entity is that suitable gateway chain of command entity chosen by subscriber equipment, and real by mobile management
Gateway chain of command entity selected by body is that subscriber equipment selects serving gateway service face entity, it is ensured that
After SGW is separated into two entities of SGW-C and SGW-U, the effective of evolution block core net framework runs.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of network architecture schematic diagram of the EPC core net that 3GPP specifies at present；
Fig. 2 is a kind of network architecture schematic diagram of the EPC core net strengthened；
A kind of flowchart of the gateway system of selection that Fig. 3 provides for the embodiment of the present invention；
Fig. 4 is that destination service gateway chosen by subscriber equipment for the mobile management entity that the embodiment of the present invention provides
A kind of flowchart of chain of command entity；
The destination service gateway control face entity that Fig. 5 provides for the embodiment of the present invention holds in response to the first foundation
Carry request, choose a kind of flowchart of destination service gateway customer face entity for subscriber equipment；
The another kind of flowchart of the gateway system of selection that Fig. 6 provides for the embodiment of the present invention；
Another flowchart of the gateway system of selection that Fig. 7 provides for the embodiment of the present invention.
Term " first " in specification and claims and above-mentioned accompanying drawing, " second ", " the 3rd "
(if present) such as " the 4 " is for distinguishing similar part, the most suitable without being used for describing
Sequence or precedence.Should be appreciated that the data of so use can be exchanged in the appropriate case, in order to here
The embodiments herein described can be implemented with the order in addition to here illustrating.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not paying
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
In order to be better understood from the embodiment of the present invention, first existing evolution block core net EPC is carried out
Explanation.
Core network device in existing EPC includes: mobile management entity MME, gateway
SGW, PDN Gateway PGW, and the home subscriber server (Home for storing user subscription information
Subcriber Server, HSS) and be used for measuring control and charging criterion functional entity (Policy and
Charging rules function, PCRF) etc..Wherein,
MME is the equipment that EPC core net uniquely controls plane, and its major function includes: access
Control, mobile management, session management, network element select, store user's carrying information etc..
SGW is positioned at user plane, is the net towards evolved universal Radio Access Network (E-UTRAN) side
Close, the user equipment (UE) that each is accessed E-UTRAN, once can only be taken for it by a SGW
Business.The major function of SGW is by session management, Route Selection and data forwarding, service quality (Quality
Of Server, QOS) control, charging and storage information etc..
PGW is positioned at user plane, is towards public data network (Public Data Network, PDN)
End in the gateway of SGi interface, i.e. PGW by the IP server of SGi interface and operator (e.g.,
Packet switching service server (Packet Switching Service, PSS)；IP Multimedia System takes
Business device (Ip Multimedia Subsystem, IMS) etc.).Will if UE accesses multiple PDN, UE
Corresponding one or more PGW.The major function of PGW includes the distribution of IP address, session management, PCRF
Selection, Route Selection and data forwarding, QOS control, charging, strategy and charging execution etc..
PCRF comprises policy control decision and the function controlled based on flow based charging, to the plan being positioned in PGW
Slightly control to perform functional entity (Policy and Charging Enforcement Function, PCEF) to provide
About server data stream detection, gate, based on QOS and network control function based on flow based charging.
As it is shown in figure 1, a kind of network architecture schematic diagram of the EPC core net specified at present for 3GPP.
In Fig. 1, user is in home network, not roaming.The when that user not roaming, structure comparison
Simply, signaling and media are all to be continued by home network, and all of network element is the most all that home network provides.
The control plane of LTE system is connected with MME by S1-MME interface, and user plane is connect by S1-U
Mouth is directly connected with SGW, SGW with PGW is connected by S5 interface.
At present, chain of command and the user face of EPC core network element do not separate, and SGW generally concentrates and is deployed in
The machine room of operator, SGW user face data to be transmitted, also to transmit some chain of command signalings, with
EPC core network data bag and forward the increase day by day of quantity, the capacity of SGW becomes restriction core network
The bottleneck that speed promotes, deployment centralized for SGW makes networking dumb, and autgmentability is poor, it is impossible to adapt to not
Carry out the development of business.To this end, 3GPP determines the research that LTE core network chain of command separates with user face
Project verification, by core network element SGW, PGW and TDF, (Traffic Detection Function, flow is supervised
Brake entity, belongs to optional network element device in core net, not shown in Fig. 1) chain of command function
Separate with user plane functions.
As in figure 2 it is shown, a kind of network architecture schematic diagram of the EPC core net for strengthening.Former core net net
SGW in network framework is separated into two entities: gateway chain of command entity SGW-C and gateway
User entity SGW-U, wherein, SGW-C is for realizing the chain of command function of former SGW, SGW-U
For realizing the user plane functions of former SGW.Gateway chain of command entity and service gateway customer face entity
Between introduce new interface (in Fig. 2 shown in dotted line) to carry out information mutual.Being similar to, former PGW is also classified into
Packet data gateway chain of command entity PGW-C and packet data gateway user entity PGW-U.
SGW-C with PGW-C is controlled the mutual of surface information by S5 interface；SGW-U and PGW-U
The mutual of user plane information is carried out by S5 interface.
After chain of command separates with user face, the design of each entity can be simplified so that it is more adapt to distributed
Network structure, there is higher networking flexibility and extensibility, thus be more suitable for future services
Development.Gateway chain of command entity and service gateway customer face entity can be one-to-many (i.e. one clothes
Business gateway control face entity is connected with multiple gateway user entities) or the annexation of multi-to-multi,
Flexible deployment can be carried out according to different business scenarios.Such as, for the urban settings that user is intensive,
Gateway user entity can be deployed in the cell side near access network, and for the sparse suburb of user
District, gateway user entity can concentrate on regional center (i.e. the central area of rural subscriber)；
Meanwhile, gateway chain of command entity can still concentrate the machine room being deployed in operator, it is simple to machine room
Other interior chain of command core net node (MME, HSS etc.) interacts, it is also possible to portion as required
Administration is in access network side.
It should be noted that the EPC network architecture strengthened is each company research of current 3GPP tissue
Focus, last framework does not the most determine, Fig. 2 strengthen EPC network architecture schematic diagram be current 3GPP
Major part member organization tends to the scheme adopted, and the EPC framework being ultimately written standard may with Fig. 2 slightly
Difference.
It addition, merely illustrate the network element relevant to the embodiment of the present invention in Fig. 1 with Fig. 2, other network element is not
Illustrate.
Before chain of command separates with user face, MME be responsible for core net gateway select, i.e. gateway and
The selection of PDN Gateway all realizes in MME.After chain of command separates with user face, due to service
Gateway customer face entity belongs to user face nodes, and MME is chain of command node, and the two association is little, and
Therebetween direct interface is not had to communicate, bearing of MME more difficult acquisition gateway user entity
Load situation and gateway user entity and the Link State of other network, therefore, selected by MME
The scheme of gateway is not suitable for the EPC network architecture strengthened.Based on this, the embodiment of the present invention provides
The gateway system of selection of a kind of EPC network architecture being applicable to strengthen and system.
The a kind of of gateway system of selection that referring to Fig. 3, Fig. 3 provides for the embodiment of the present invention realizes stream
Cheng Tu, may include that
Step S31: mobile management entity is that destination service gateway control face entity chosen by subscriber equipment；
In the embodiment of the present invention, mobile management entity MME is from the some gateways being connected with this MME
Selecting a gateway chain of command entity SGW-C in chain of command entity is user equipment (UE) service.
Step S32: mobile management entity sends the first foundation carrying to destination service gateway control face entity please
Ask；
After mobile management entity chooses destination service gateway control face entity, to this destination service gateway control
Face entity sends sets up carrying request, to set up carrying with this destination service gateway control face entity, and touches
Sending out this destination service gateway control face entity is that subscriber equipment selects gateway user entity SGW-U.
Step S33: destination service gateway control face entity sets up carrying request in response to first, sets for user
Alternative take destination service gateway customer face entity.
Destination service gateway control face entity is from the some clothes being connected with this destination service gateway control face entity
Selecting a gateway user entity in the entity of business gateway customer face is above-mentioned user equipment (UE) service.
Step S34: destination service gateway control face entity sends second to destination service gateway customer face entity
Set up carrying request.
After selected gateway user entity, it is possible to send to selected gateway user entity
Second sets up carrying request, to set up carrying with this selected gateway user entity.
The gateway system of selection that the embodiment of the present invention provides, is subscriber equipment choosing by mobile management entity
Take suitable gateway chain of command entity, and by the gateway chain of command selected by mobile management entity
Entity is that subscriber equipment selects serving gateway service face entity, it is ensured that SGW be separated into SGW-C and
Effective operation of evolution block core net framework after two entities of SGW-U.
Optionally, the mobile management entity that the embodiment of the present invention provides is that destination service net chosen by subscriber equipment
Close a kind of flowchart of chain of command entity as shown in Figure 4, may include that
Step S41: mobile management entity obtain subscriber equipment can the row of gateway chain of command entity
Table；
Gateway chain of command entity in list is all the gateway control that can serve this subscriber equipment
Face processed entity.
If list is empty, list does not i.e. have any gateway chain of command entity, illustrates not meet use
The gateway chain of command entity that family device transmission requires, mobile management entity selects gateway failure,
Subscriber equipment cannot access EPC core net by this mobile management entity.
Step S42: mobile management entity is each gateway chain of command entity distribution weight in list；
Can be according to the configuration parameter of gateway chain of command entity, and the operational factor of reality is service network
Close chain of command entity distribution weight.
Step S43: the gateway chain of command entity that weight is maximum is defined as target clothes by mobile management entity
Business gateway control face entity.
In the embodiment of the present invention, the weight of gateway chain of command entity is the biggest, shows this gateway control
The face processed selected priority of entity is the highest, the most preferential selected.
Optionally, the embodiment of the present invention provide mobile management entity obtain subscriber equipment can service network
A kind of implementation of the list closing chain of command entity can be:
Mobile management entity obtain the subscriber equipment that determined by name server can gateway chain of command
The list of entity.
Concrete, name server can be according to position (the i.e. tracking residing for subscriber equipment of subscriber equipment
District identifies, Tracing Area Identify, TAI) parse the available clothes that can serve this subscriber equipment
Business gateway control face entity, these gateway chain of command entities constitute the optional service network of this subscriber equipment
Close chain of command list of entities.
Optionally, the mobile management entity that the embodiment of the present invention provides is each gateway control in list
A kind of implementation of face processed entity distribution weight is specifically as follows:
The interface protocol type that mobile management entity is supported based on gateway chain of command entity, and service
The load state of gateway control face entity is each gateway chain of command entity distribution weight in list.
Wherein, the interface protocol type of gateway chain of command entity support belongs to gateway chain of command in fact
The configuration parameter of body, the load state of gateway chain of command entity then embodies gateway chain of command
The actual operation conditions of entity.
If the interface protocol type that gateway chain of command entity is supported and the business of user device transmissions
Join, then the load of gateway chain of command entity is the biggest, and its weight is the least；Loading the least, its weight is more
Greatly.
The interface protocol type of gateway chain of command entity support mates with the business of user device transmissions
Refer to: gateway chain of command entity can meet the data transfer demands of subscriber equipment.Such as, according to clothes
The interface protocol type that business gateway control face entity is supported, gateway chain of command entity can be divided into three kinds
Type: only support the gateway chain of command entity of GTP interface protocol, only support PMIP interface protocol
Gateway chain of command entity, and not only support GTP interface protocol but also support PMIP interface protocol
Gateway chain of command entity.If the business need of user device transmissions supports GTP interface protocol, and
Certain gateway chain of command entity only supports PMIP interface protocol, then this certain gateway chain of command is real
The interface protocol type of body support does not mates with the business of user device transmissions；And if this certain gateway
Chain of command entity only supports GTP interface protocol, or, not only support GTP interface protocol but also support PMIP
Interface protocol, then the interface protocol type that this certain gateway chain of command entity is supported passes with subscriber equipment
Defeated business coupling.
Optionally, in order to ensure that mobile management entity learns the load shape of gateway chain of command entity in time
Condition, mobile management entity all gateway chain of command entities controlled report it to mobile management entity
Load state.Concrete,
Gateway chain of command entity can periodically report, the most at set intervals, and gateway control
Face processed entity reports once its load state to mobile management entity.
Can also report in the way of event triggering, such as, the load state of gateway chain of command entity
The change of load state that distance reported last time exceedes default variable threshold, then on mobile management entity
Report load state.
Wherein, load state can be weighed with percentage ratio, the load that i.e. gateway chain of command entity is current
Amount and the ratio of load capacity under full load condition.
Optionally, the interface protocol type that mobile management entity is supported based on gateway chain of command entity,
And the load state of gateway chain of command entity is that each gateway chain of command entity in list divides
A kind of implementation joining weight is specifically as follows:
If the business of interface protocol type and user device transmissions that gateway chain of command entity is supported is not
Join, then mobile management entity be gateway chain of command entity distribution weight be 0；
If the load state of gateway chain of command entity exceedes preset load-threshold value, then mobile management
Entity be gateway chain of command entity distribution weight be also 0；
Optionally, if the weight of gateway chain of command entity is 0, then by this gateway chain of command entity
It is considered as invalid gateway chain of command entity, rejects from gateway chain of command list of entities.
If the interface protocol type that gateway chain of command entity is supported and the business of user device transmissions
Join, and the load of gateway chain of command entity is not less than preset load-threshold value, then mobile management is real
Body is that gateway chain of command entity distributes weight according to the first formula, and the first formula is:
wc=1Lc+μc
Wherein, wcFor the weight of gateway chain of command entity c, LcFor gateway chain of command entity c's
Load capacity, μcFor the modifying factor corresponding with gateway chain of command entity c.
In the embodiment of the present invention, the modifying factor that different gateway chain of command entities is corresponding may be identical
It is likely to difference.Specifically can set according to gateway chain of command entity stability in certain period of time
Put the concrete value of modifying factor.It is to say, same gateway chain of command entity is in the different time
In section, the value of modifying factor is likely to difference.Such as, certain gateway chain of command entity relative to
Around for other gateway chain of command entity, unstable properties in nearest a period of time, frequently occur
Overload or the link failure with miscellaneous equipment, then need to reduce this certain gateway chain of command entity
The value of modifying factor so that this certain gateway chain of command entity maintains relatively low load.And if
This certain gateway chain of command entity is for other gateway chain of command entity of surrounding, recently
Stable performance in a period of time, less appearance is transshipped, and is not broken down, then with the link of miscellaneous equipment
The value of the modifying factor of this certain gateway chain of command entity can be heightened, make this certain gateway
Chain of command entity maintains higher load.
Gateway chain of command entity c is any one service network in gateway chain of command list of entities
Close chain of command entity.
It is the implementation phase that destination service gateway control face entity chosen by subscriber equipment with mobile management entity
Seemingly, in the embodiment of the present invention, destination service gateway control face entity sets up carrying request in response to first,
A kind of flowchart of destination service gateway customer face entity is chosen as figure 5 illustrates for subscriber equipment, permissible
Including:
Step S51: destination service gateway control face entity obtain subscriber equipment can gateway user face
The list of entity；
Gateway user entity in list is all that the gateway that can serve this subscriber equipment is used
Face, family entity.
If list is empty, list does not i.e. have any gateway user entity, then illustrates that this target takes
The gateway user entity that business gateway control face entity controls all cannot meet the data of this subscriber equipment
Transmission requirement, then this destination service gateway control face entity sends to set up to mobile management entity and carries unsuccessfully
Response message.Mobile management entity is after receiving the response message that foundation carrying is failed, by this target
The weight of gateway chain of command entity is set to 0, it is also possible to by this destination service gateway control face entity from clothes
Business gateway control face list of entities is deleted, then reselects new destination service gateway control face entity.
Step S52: destination service gateway control face entity is each gateway user entity in list
Distribution weight；
Can be according to the configuration parameter of gateway user entity, and the operational factor of reality is service network
Close user entity distribution weight.
Step S53: destination service gateway control face entity is by true for the gateway user entity that weight is maximum
It is set to destination service gateway customer face entity.
In the embodiment of the present invention, the weight of gateway user entity is the biggest, shows that this gateway is used
Face, the family selected priority of entity is the highest, the most preferential selected.
Optionally, the destination service gateway control face entity that the embodiment of the present invention provides obtains subscriber equipment can
A kind of implementation of list of gateway user entity can be:
Destination service gateway control face entity obtain the subscriber equipment that determined by name server can service
The list of gateway customer face entity.
Concrete, name server can be according to position (the i.e. tracking residing for subscriber equipment of subscriber equipment
District identifies, Tracing Area Identify, TAI) parse the available clothes that can serve this subscriber equipment
Business gateway customer face entity, these gateway user entities constitute the optional service network of this subscriber equipment
Close user entity list.
Optionally, the destination service gateway control face entity that the embodiment of the present invention provides is each in list
A kind of implementation of gateway user entity distribution weight is specifically as follows:
The interface protocol class that destination service gateway control face entity is supported based on gateway user entity
Type, and the load state of gateway user entity is that each gateway user face in list is real
Body distribution weight.
Wherein, the interface protocol type of gateway user entity support belongs to gateway user face in fact
The configuration parameter of body, the load state of gateway user entity then embodies gateway user face
The actual operation conditions of entity.
If the interface protocol type that gateway user entity is supported and the business of user device transmissions
Join, then the load of gateway user entity is the biggest, and its weight is the least；Loading the least, its weight is more
Greatly.
The interface protocol type of gateway user entity support mates with the business of user device transmissions
Refer to: gateway user entity can meet the data transfer demands of subscriber equipment.Such as, according to clothes
The interface protocol type that business gateway customer face entity is supported, gateway user entity can be divided into three kinds
Type: only support the gateway user entity of GTP interface protocol, only support PMIP interface protocol
Gateway user entity, and not only support GTP interface protocol but also support PMIP interface protocol
Gateway user entity.If the business need of user device transmissions supports GTP interface protocol, and
Certain gateway user entity only supports PMIP interface protocol, then this certain gateway user face is real
The interface protocol type of body support does not mates with the business of user device transmissions；And if this certain gateway
User entity only supports GTP interface protocol, or, not only support GTP interface protocol but also support PMIP
Interface protocol, then the interface protocol type that this certain gateway user entity is supported passes with subscriber equipment
Defeated business coupling.
Optionally, in order to ensure that gateway chain of command entity learns gateway user entity in time
Load state, gateway chain of command entity all gateway user entities controlled are to service network
Close chain of command entity and report its load state.Concrete,
Gateway user entity can periodically report, and the most at set intervals, gateway is used
Face, family entity reports once its load state to gateway chain of command entity.
Can also report in the way of event triggering, such as, the load state of gateway user entity
The changing of load state reported apart from last time exceedes default variable threshold, then to gateway control
Face entity reports load state.
Wherein, load state can be weighed with percentage ratio, the load that i.e. gateway user entity is current
Amount and the ratio of load capacity under full load condition.
Optionally, the interface that destination service gateway control face entity is supported based on gateway user entity
Protocol type, and the load state of gateway user entity is that each gateway in list is used
A kind of specific implementation of face, family entity distribution weight can be:
If the business of interface protocol type and user device transmissions that gateway user entity is supported is not
Join, then destination service gateway control face entity be gateway user entity distribution weight be 0；
If the load state of gateway user entity exceedes preset load-threshold value, then destination service
Gateway control face entity be gateway user entity distribution weight be also 0；
Optionally, if the weight of gateway user entity is 0, then by this gateway user entity
It is considered as invalid gateway user entity, rejects from gateway user entity list.
If the interface protocol type that gateway user entity is supported and the business of user device transmissions
Join, and the load of gateway user entity is not less than preset load-threshold value, then destination service net
Closing chain of command entity according to the first formula is that gateway user entity distributes weight, and the first formula is:
wu=1/Lu+μu
Wherein, wuFor the weight of gateway user entity u, LuFor gateway user entity u's
Load capacity, μuFor the modifying factor corresponding with gateway user entity u.
In the embodiment of the present invention, the modifying factor that different gateway user entities is corresponding may be identical
It is likely to difference.Specifically can set according to gateway user entity stability in certain period of time
Put the concrete value of modifying factor.It is to say, same gateway user entity is in the different time
In section, the value of modifying factor is likely to difference.Such as, certain gateway user entity relative to
Around for other gateway user entity, unstable properties in nearest a period of time, frequently occur
Overload or the link failure with miscellaneous equipment, then need to reduce this certain gateway user entity
The value of modifying factor so that this certain gateway user entity maintains relatively low load.And if
This certain gateway user entity is for other gateway user entity of surrounding, recently
Stable performance in a period of time, less appearance is transshipped, and is not broken down, then with the link of miscellaneous equipment
The value of the modifying factor of this certain gateway user entity can be heightened, make this certain gateway
User entity maintains higher load.
Gateway chain of command entity u is any one service network in gateway user entity list
Close user entity.
The embodiment of the present invention provide gateway system of selection another kind of flowchart as shown in Figure 6,
May include that
Step S61:MME is that user equipment (UE) selects target SGW-C；
Step S62:MME sends the first foundation carrying request to target SGW-C selected；
Step S63: target SGW-C sets up carrying request in response to first, selects target for UE
SGW-U；
Step S64: target SGW-C sends the second foundation carrying request to target SGW-U selected；
Step S65: target SGW-U sets up carrying request in response to second, sends to target SGW-C
Set up and carry successful first response message；
Step S66: target SGW-C sends to set up to MME and carries successful second response message.
The embodiment of the present invention provide gateway system of selection another flowchart as it is shown in fig. 7,
May include that
Step S71:MME updates the optional SGW-C list of UE, and is each in SGW-C list
Individual SGW-C arranges weight.
Step S72: judge whether SGW-C list is empty, the most then terminate, if it is not, then perform step
Rapid S73.
Step S73: the SGW-C of weight selection maximum is optimum SGW-C (i.e. target SGW-C),
The first foundation carrying request is sent to optimum SGW-C.
Step S74: the SGW-C receiving the first foundation carrying request according to self load condition judgement is
No can receive UE；If of course, then perform step S75, if cannot, then perform step S710.
Step S75: the SGW-C receiving the first foundation carrying request updates the optional SGW-U of UE
List, and weight is set for each SGW-U in SGW-U list.
Step S76: judge whether SGW-U list is empty, the most then perform step S710, if it is not,
Then perform step S77.
Step S77: the SGW-U of weight selection maximum is optimum SGW-U, sends to optimum SGW-U
Second sets up carrying request.Step S78: receive the SGW-U of the second foundation carrying request according to self
Load state judges whether to receive UE；If of course, then perform step S79, if cannot, then hold
Row step S712.
Step S79: send response message, including: receive second foundation carrying request SGW-U to
Send the second SGW-C transmission setting up carrying request and set up successful first response message of carrying, receive
The SGW-C of the first response message sends to set up to MME and carries successful second response message.
Step S710: the SGW-C receiving the first foundation carrying request sends foundation carrying to MME
3rd response message of failure.
After step S711:MME receives the 3rd response message, the SGW-C of the 3rd response message will be sent
Delete from SGW-C list, subsequently into step S72.
Step S712: the SGW-U receiving the second foundation carrying request please to transmission the second foundation carrying
The SGW-C asked sends and sets up the 4th response message carried unsuccessfully.
Step S713: the SGW-C receiving the 4th response message will send the 4th response message
SGW-U deletes from SGW-U list, subsequently into step S76.
Wherein, step S71～step S73, and step S711 performs by MME.Step S74～step
Rapid S77, and step S710 and step S713 are by optimum SGW-C execution.Step S78 and step
S712 is performed by optimum SGW-U.
Corresponding with embodiment of the method, the embodiment of the present invention also provides for a kind of gateway and selects system, this
The gateway that inventive embodiments provides selects system to include: mobile management entity, with mobile management entity
Connect at least one gateway chain of command entity, and with at least one gateway chain of command above-mentioned
Several gateway user entities that entity connects；Wherein, gateway chain of command entity and service
It can be annexation (i.e. one the gateway chain of command entity of one-to-many between the entity of gateway customer face
It is connected with multiple gateway user entities), it is also possible to for the annexation of multi-to-multi.
Mobile management entity is for choosing mesh for subscriber equipment from least one gateway chain of command entity
Mark gateway chain of command entity, and please to destination service gateway control face entity transmission the first foundation carrying
Ask；
Gateway chain of command entity is for when receiving the first foundation carrying request, building in response to first
Vertical carrying request, chooses destination service gateway for subscriber equipment from several gateway user entities
User entity, sends the second foundation carrying request to destination service gateway customer face entity.
The gateway that the embodiment of the present invention provides selects system, mobile management entity be subscriber equipment choosing
Take suitable gateway chain of command entity, and by the gateway chain of command selected by mobile management entity
Entity is that subscriber equipment selects serving gateway service face entity, it is ensured that SGW be separated into SGW-C and
Effective operation of evolution block core net framework after two entities of SGW-U.
Optionally, from least one gateway chain of command entity, destination service is being chosen for subscriber equipment
The aspect of gateway control face entity, mobile management entity specifically may be used for,
Obtain subscriber equipment can the list of gateway chain of command entity；For each service in list
Gateway control face entity distribution weight；The gateway chain of command entity that weight is maximum is defined as target clothes
Business gateway control face entity.
Optionally, obtain subscriber equipment can the aspect of list of gateway chain of command entity, move
Dynamic management entity specifically may be used for,
Obtain the subscriber equipment that determined by name server can the list of gateway chain of command entity.
Optionally, distributing the aspect of weight for each gateway chain of command entity in list, mobile
Management entity specifically may be used for,
The interface protocol type supported based on gateway chain of command entity, and gateway chain of command is real
The load state of body is each gateway chain of command entity distribution weight in list.
Optionally, at the interface protocol type supported based on gateway chain of command entity, and service network
Close the side that load state is each gateway chain of command entity distribution weight in list of chain of command entity
Face, mobile management entity specifically may be used for,
If the business of interface protocol type and user device transmissions that gateway chain of command entity is supported is not
Join, or, the load state of gateway chain of command entity exceedes preset load-threshold value, then for clothes
The weight of business gateway control face entity distribution is 0；
If the interface protocol type that gateway chain of command entity is supported and the business of user device transmissions
Join, and the load state of gateway chain of command entity is not less than preset load-threshold value, then according to the
One formula is that gateway chain of command entity distributes weight, and the first formula is:
wc=1/Lc+μc
Wherein, wcFor the weight of gateway chain of command entity c, LcFor gateway chain of command entity c's
Load capacity, μcFor the modifying factor corresponding with gateway chain of command entity c.
Optionally, from several gateway user entities, destination service net is being chosen for subscriber equipment
Closing the aspect of user entity, gateway chain of command entity specifically may be used for:
Obtain subscriber equipment can the list of gateway user entity；For each service in list
Gateway customer face entity distribution weight；The gateway user entity that weight is maximum is defined as target clothes
Business gateway customer face entity.
Optionally, obtain subscriber equipment can the aspect of list of gateway user entity, clothes
Business gateway control face entity specifically may be used for:
Obtain the subscriber equipment that determined by name server can the list of gateway user entity.
Optionally, the aspect of weight, service are being distributed for each gateway user entity in list
Gateway control face entity specifically may be used for:
The interface protocol type supported based on gateway user entity, and gateway user face is real
The load state of body is each gateway user entity distribution weight in list.
Optionally, at the interface protocol type supported based on gateway user entity, and service network
Close the side that load state is each gateway user entity distribution weight in list of user entity
Face, gateway chain of command entity specifically may be used for:
If the business of interface protocol type and user device transmissions that gateway user entity is supported is not
Join, then destination service gateway control face entity be gateway user entity distribution weight be 0；
If the load state of gateway user entity exceedes preset load-threshold value, then destination service
Gateway control face entity be gateway user entity distribution weight be also 0；
Optionally, if the weight of gateway user entity is 0, then by this gateway user entity
It is considered as invalid gateway user entity, rejects from gateway user entity list.
If the interface protocol type that gateway user entity is supported and the business of user device transmissions
Join, and the load of gateway user entity is not less than preset load-threshold value, then destination service net
Closing chain of command entity according to the first formula is that gateway user entity distributes weight, and the first formula is:
wu=1/Lu+μu
Wherein, wuFor the weight of gateway user entity u, LuFor gateway user entity u's
Load capacity, μuFor the modifying factor corresponding with gateway user entity u.
Those of ordinary skill in the art are it is to be appreciated that combine each of the embodiments described herein description
The unit of example and algorithm steps, it is possible to electronic hardware or computer software and the knot of electronic hardware
Incompatible realization.These functions perform with hardware or software mode actually, depend on the spy of technical scheme
Fixed application and design constraint.Professional and technical personnel can use not Tongfang to each specifically should being used for
Method realizes described function, but this realization is it is not considered that beyond the scope of this invention.
Those skilled in the art is it can be understood that arrive, and for convenience and simplicity of description, above-mentioned retouches
The specific works process of system, device (if present) and the unit (if present) stated, before being referred to
State the corresponding process in embodiment of the method, do not repeat them here.
In several embodiments provided herein, it should be understood that disclosed system, device (if
Exist) and method, can realize by another way.Such as, device embodiment described above
It is only schematically, such as, the division of described unit, it is only a kind of logic function and divides, actual
Can have when realizing other dividing mode, the most multiple unit or assembly can in conjunction with or can be integrated
To another system, or some features can be ignored, or does not performs.Another point, shown or discussed
Coupling each other or direct-coupling or communication connection can be by some interfaces, device or unit
INDIRECT COUPLING or communication connection, can be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, makees
The parts shown for unit can be or may not be physical location, i.e. may be located at a place,
Or can also be distributed on multiple NE.Can select according to the actual needs part therein or
The whole unit of person realizes the purpose of the present embodiment scheme.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit,
Can also be that unit is individually physically present, it is also possible to two or more unit are integrated in a list
In unit.
If described function realizes and as independent production marketing or use using the form of SFU software functional unit
Time, can be stored in a computer read/write memory medium.Based on such understanding, the present invention's
Part or the part of this technical scheme that prior art is contributed by technical scheme the most in other words can
Embodying with the form with software product, this computer software product is stored in a storage medium,
Including some instructions with so that computer equipment (can be personal computer, server, or
The network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And it is aforesaid
Storage medium includes: USB flash disk, portable hard drive, read only memory (ROM, Read-Only Memory),
Random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can
To store the medium of program code.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
See, generic principles defined herein can without departing from the spirit or scope of the present invention,
Realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein,
And it is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (10)
1. a gateway system of selection, it is characterised in that including:
Mobile management entity is that destination service gateway control face entity chosen by subscriber equipment；
Described mobile management entity sends the first foundation carrying to described destination service gateway control face entity please
Ask；
Described destination service gateway control face entity sets up carrying request in response to described first, for described use
Family equipment chooses destination service gateway customer face entity；
Described destination service gateway control face entity sends second to described destination service gateway customer face entity
Set up carrying request.
Method the most according to claim 1, it is characterised in that described mobile management entity is user
Equipment is chosen destination service gateway control face entity and is included:
Described mobile management entity obtain described subscriber equipment can the row of gateway chain of command entity
Table；
Weight is distributed for each gateway chain of command entity in described list；
The gateway chain of command entity that weight is maximum is defined as destination service gateway control face entity.
Method the most according to claim 2, it is characterised in that described mobile management entity obtains institute
State subscriber equipment can the list of gateway chain of command entity include:
Described mobile management entity obtain the described subscriber equipment that determined by name server can service network
Close the list of chain of command entity.
Method the most according to claim 2, it is characterised in that described for each in described list
Gateway chain of command entity distribution weight includes:
The interface protocol type supported based on gateway chain of command entity, and gateway chain of command is real
The load state of body is each gateway chain of command entity distribution weight in described list.
Method the most according to claim 4, it is characterised in that described based on gateway chain of command
The interface protocol type that entity is supported, and the load state of gateway chain of command entity is described list
In each gateway chain of command entity distribution weight include:
If the interface protocol type that described gateway chain of command entity is supported and described user device transmissions
Business is not mated, or, the load state of described gateway chain of command entity exceedes preset load door
Limit value, then the weight for the distribution of described gateway chain of command entity is 0；
If the interface protocol type that described gateway chain of command entity is supported and described user device transmissions
Business is mated, and the load state of described gateway chain of command entity is not less than preset load-threshold value,
Then foundation the first formula is that described gateway chain of command entity distributes weight, and described first formula is:
wc=1/Lc+μc
Wherein, wcFor the weight of gateway chain of command entity c, LcFor gateway chain of command entity c's
Load capacity, μcFor the modifying factor corresponding with gateway chain of command entity c.
6. gateway selects a system, including: mobile management entity, with described mobile management entity
Connect at least one gateway chain of command entity, and with at least one gateway chain of command described
Several gateway user entities that entity connects；It is characterized in that,
Described mobile management entity is for setting for user from least one gateway chain of command entity described
The alternative destination service gateway control face entity that takes, and send the to described destination service gateway control face entity
One sets up carrying request；
Described gateway chain of command entity is for when receiving the first foundation carrying request, in response to institute
State the first foundation carrying request, be described subscriber equipment from several gateway user entities described
Choose destination service gateway customer face entity, send second to described destination service gateway customer face entity and build
Vertical carrying request.
System the most according to claim 6, it is characterised in that from least one service network described
Close the aspect choosing destination service gateway control face entity in chain of command entity for subscriber equipment, described movement
Management entity is used for,
Obtain described subscriber equipment can the list of gateway chain of command entity；For in described list
Each gateway chain of command entity distribution weight；The gateway chain of command entity that weight is maximum is determined
For destination service gateway control face entity.
System the most according to claim 7, it is characterised in that can use obtaining described subscriber equipment
The aspect of list of gateway chain of command entity, described mobile management entity is used for,
Obtain the described subscriber equipment that determined by name server can the row of gateway chain of command entity
Table.
System the most according to claim 7, it is characterised in that taking for each in described list
The method of business gateway control face entity distribution weight, described mobile management entity is used for,
The interface protocol type supported based on gateway chain of command entity, and gateway chain of command is real
The load state of body is each gateway chain of command entity distribution weight in described list.
System the most according to claim 9, it is characterised in that based on gateway chain of command
The interface protocol type that entity is supported, and the load state of gateway chain of command entity is described list
In each gateway chain of command entity distribution weight aspect, described mobile management entity is used for,
If the interface protocol type that described gateway chain of command entity is supported and described user device transmissions
Business is not mated, or, the load state of described gateway chain of command entity exceedes preset load door
Limit value, then the weight for the distribution of described gateway chain of command entity is 0；
If the interface protocol type that described gateway chain of command entity is supported and described user device transmissions
Business is mated, and the load state of described gateway chain of command entity is not less than preset load-threshold value,
Then foundation the first formula is that described gateway chain of command entity distributes weight, and described first formula is:
wc=1/Lc+μc
Wherein, wcFor the weight of gateway chain of command entity c, LcFor gateway chain of command entity c's
Load capacity, μcFor the modifying factor corresponding with gateway chain of command entity c.
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