CN107529194A - Service restoration method and system, packet data gateway and mobility management entity - Google Patents
Service restoration method and system, packet data gateway and mobility management entity Download PDFInfo
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- CN107529194A CN107529194A CN201610460665.XA CN201610460665A CN107529194A CN 107529194 A CN107529194 A CN 107529194A CN 201610460665 A CN201610460665 A CN 201610460665A CN 107529194 A CN107529194 A CN 107529194A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
- H04W48/06—Access restriction performed under specific conditions based on traffic conditions
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Abstract
The embodiment of the invention discloses a kind of service restoration method and system, packet data gateway and mobility management entity, operated by indicating that mobility management entity starts access point overload mechanism with interrupting the service access in the range of back off time, and in the range of back off time, detect access point whether overload, when the non-overload of access point, the message for the back off time field for carrying complete zero is sent to mobility management entity, indicate that mobility management entity deletes back off time timer corresponding with access point, so as to recover service access operation in advance, the time of service disconnection is shortened to a certain extent, so that the recovery of access point overload is more flexible, the corresponding access efficiency for also improving business, lift the usage experience of user.
Description
Technical field
The present invention relates to wireless local area network technology field, more particularly to a kind of service restoration method and system, grouped data
Gateway and mobility management entity.
Background technology
At present, in 3GPP (3rd Generation Partnership Project, third generation partner program) R12
Some reply GTP-C (GPRS Tunnelling Protocol-Control have been formulated in agreement 23.401 and 29.274
Plane, chain of command GPRS Tunnel Protocol) overloading control strategy, with every APN, (Access Point Name, connect the strategy
Access point title) it is granularity, concrete mode is as follows：
When the carrying number under some APN on PGW (PDN Gateway, packet data gateway) reaches some value or carrying
When access rate reaches some value, the conversation establishing request message of user is rejected by, carries special 113 (APN congestions) failure
Cause value, and back-off time (back off time) are carried to MME (Mobility Management Entity, mobility
Management entity), back-off time represent a period of time, and during this period of time MME can not ask the conversation establishing of the APN
Corresponding PGW is issued again, has only been crossed after this period, could recover access.
Back-off time fields are sent to MME by PGW, and MME is directed to back off time timer corresponding to APN settings,
Control no longer accesses this PGW using the session of the APN in back-off time.In aforementioned protocols, received as MME
When back-off time fields are full 0s, the control before representing to stop, recovering normal business, but the agreement only shows
Back-off time fields are only in Create Session Response (establishment conversational response) message and cause value is
It can just carry, not pointed out before back-off time are not reached when 113, how shorten the time of this PGW interrupting service,
So as to recover business as early as possible.If the back-off time sent on PGW are very long (can even is that endless), existing
Business recovery mode be when back-off time reach could recovery business, when back-off time endless, PGW without
Method accesses new session again, influences the usage experience of user to a certain extent.
The content of the invention
Service restoration method and system, packet data gateway and the mobile management provided according to embodiments of the present invention is real
Body, mainly solves the technical problem that can not shorten business interruption time in the prior art.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of service restoration method, including：
Instruction mobility management entity starts access point overload mechanism and connect with interrupting the business in the range of back off time
Enter operation；
In the range of the back off time, detection access point whether overload；
When the non-overload of access point, to mobility management entity send message, instruction mobility management entity delete with
Back off time timer corresponding to described access point carries complete zero back off time to recover service access operation in the message
Field.
The embodiment of the present invention also provides a kind of service restoration method, including：
Access point overload mechanism is started to interrupt the industry in the range of back off time according to the instruction of packet data gateway
Business access operation；
In the range of the back off time and in the case of the non-overload of access point, disappearing for packet data gateway transmission is received
Breath；
Back off time timer corresponding with described access point is deleted according to the message to recover service access operation, institute
State carried in message complete zero back off time field.
The embodiment of the present invention also provides a kind of packet data gateway, including：Load indicating module, load detection module and
Sending module；
The load indicating module is used to indicate that mobility management entity starts access point overload mechanism and moved back to interrupt
The service access operation kept away in time range；
The load detection module be used in the range of the back off time, detection access point whether overload；
The sending module is used for when the non-overload of access point, and message, instruction movement are sent to mobility management entity
Property management entity delete corresponding with described access point back off time timer and operated with recovering service access, taken in the message
With complete zero back off time field.
The embodiment of the present invention also provides a kind of mobility management entity, including：Overload mechanism starting module, receiving module
And timer removing module；
The load mechanism starting module be used for according to the instruction of packet data gateway start access point overload mechanism with
Interrupt the service access operation in the range of back off time；
The receiving module is used in the range of the back off time and in the case of the non-overload of access point, receives packet
The message that data gateway is sent；
The timer removing module is used to delete back off time timing corresponding with described access point according to the message
Device carries complete zero back off time field to recover service access operation in the message.
The embodiment of the present invention also provides a kind of business recovery system, including：Gateway, Packet Data Network as described above
Pass and mobility management entity as described above；
The packet data gateway sends message to gateway, and complete zero back off time field is carried in the message；
The gateway sends the message to the mobility management entity；
The mobility management entity receives the message, and carries out business recovery according to the message.
The embodiment of the present invention also provides a kind of computer-readable storage medium, and computer is stored with the computer-readable storage medium
Executable instruction, the computer executable instructions are used for the wireless access point switching method for performing foregoing any one.
The beneficial effects of the invention are as follows：
Service restoration method and system, packet data gateway, the mobility management entity provided according to embodiments of the present invention
And computer-readable storage medium, by indicating that mobility management entity starts access point overload mechanism to interrupt in back off time
In the range of service access operation, and in the range of back off time, detection access point whether overload, when the non-overload of access point
When, to mobility management entity send carry complete zero back off time field message, instruction mobility management entity delete with
Back off time timer corresponding to access point, so as to recover service access operation in advance, shorten to a certain extent in business
The disconnected time so that the recovery of access point overload is more flexible, also improves the access efficiency of business accordingly, lifts user
Usage experience.
Brief description of the drawings
Fig. 1 is the service restoration method flow chart that the embodiment of the present invention one provides；
Fig. 2 is another service restoration method flow chart that the embodiment of the present invention two provides；
Fig. 3 is the deletion session flow chart that the embodiment of the present invention three provides；
Fig. 4 is the establishment session flow chart that the embodiment of the present invention four provides；
Fig. 5 is the bearer update flow chart that the embodiment of the present invention five provides；
Fig. 6 is the packet data gateway schematic diagram that the embodiment of the present invention six provides；
Fig. 7 is the mobility management entity schematic diagram that the embodiment of the present invention seven provides；
Fig. 8 is the business recovery system schematic that the embodiment of the present invention eight provides.
Embodiment
The embodiment of the present invention is described in further detail below by embodiment combination accompanying drawing.
Embodiment one
In order to solve before back-off time in the prior art have not timed out and reach, PGW can not actively recover business, cause
Business interruption time can not shorten, and so as to influence the technical problem of user experience, the embodiment of the present invention provides a kind of business
Restoration methods, what the service restoration method was protected is the concrete operations flow that PGW sides perform, and refers to Fig. 1, and Fig. 1 is the present invention
The service restoration method flow chart that embodiment provides, it is comprised the following steps that：
S11, instruction MME start APN overloads mechanism and operated with interrupting the service access in the range of back off time.
Specifically, APN is arranged on PGW, each PGW is provided with multiple APN, and setting is loaded beyond as wherein some APN
Threshold value or reach setting carrying scope when, PGW to MME send message informing MME interrupting services access, wherein, the message
The middle back-off time fields and special 113 (APN congestions) failure reason values for carrying non-zero, back-off time tables
Show a period of time, the span of the time span can be 2 seconds to infinite, in the range of this time, MME can not be by the APN
Session issue corresponding PGW, after back-off time are reached, the access operation of business could be recovered.MME receives institute
After stating message, one back off time timer (back-off timer) is set for the APN, passes through the back off time timer control
The session for making the APN no longer accesses this PGW in back-off time time ranges, so as to interrupt PGW service access behaviour
Make.
S12, in the range of back off time, detection APN whether overload.
Specifically, when the APN overloads on PGW, PGW can indicate that MME performs APN congestion control policies, in back-
Interrupting service access operation in off time (i.e. back off time) time range so that the APN does not continue to overload.Certainly,
In back-off time time ranges, PGW detects to APN load condition, when detecting APN no longer overloads,
The proactive notification MME APN no longer overloads, service access operation can be continued.
S13, when the non-overloads of APN, message is sent to MME, instruction MME deletes back off time corresponding with the APN
Timer is operated with recovering service access.
Specifically, carrying complete zero back-off time fields in the message, it can perform MME according to the field and delete
Except the operation of back off time timer, release APN overloads mechanism and recover service access operation.Remained in the non-overloads of APN, resource
In the case of remaining, and once message, notice MME itself carrying overloads, in back-off time were transmitted across to MME before APN
Between in the range of no longer access service, based on both of the aforesaid condition, PGW actively to MME send the message informing MME APN not after
Load, service access can be continued, MME back off time timers according to corresponding to the message deletes APN, terminated to APN
The limitation of access service, wherein, carried in the message complete zero back-off time fields, complete zero back-off
Time fields are used to indicate that MME deletes back off time timer, and no longer conversation establishing request is limited.
Further, in S11 steps, when some APN overload in PGW, it is non-that PGW can send carrying to MME
The message of zero back-off time fields, instruction MME set back off time timer corresponding to APN, when MME receives PGW hairs
During the message for the carrying non-zero back-off time fields sent, timing can be carried out automatically, the timing time length is non-zero
Back-off time time spans in back-off time fields.Pass through the access of back off time Timer Controlling user
Business is never sent on PGW corresponding APN.It need to understand, PGW is upper may to have multiple APN overloads, and MME is each APN
It is equipped with a back off time timer and carries out service access control, no longer creates the session of user in back-off time
Build the corresponding A PN that request is sent on PGW.Above-mentioned APN congestion control policies are removed, can also use other controls well known in the art
System strategy is controlled to PGW access service, and the present embodiment is not limited this.
In S12 steps, judge whether overload can embody APN by carrying, and carry can by number of users or
The number of users of access per minute embodies, and a user can possess multiple carryings.Wherein, carrying can be understood as a core net
To the logical path of user.If the number of users being currently accessed accesses the upper limit more than APN itself, then it is assumed that APN overloads；Or,
If the number of users of current access per minute is more than APN itself the access rate upper limits, then it is assumed that APN overloads.Access the upper limit for
Different APN even can not be different with the different APN on PGW.The number of users of foregoing access per minute is only to the present embodiment
Explain, can also count each second or the number of users even accessed per hour per half an hour, specific measurement period do not limit.
Detected in back-off time time ranges APN whether overload, it is intended that in the time range,
The back off time timer that MME is set starts overload mechanism, causes business to access corresponding APN on PGW, based on described
Overload mechanism, if detecting APN overloads, business can not still access PGW, if detecting the non-overloads of APN, pass through
PGW sends message to MME and informs the MME APN no longer overloads, then MME deletes back off time timer contact overload machine
System, or back off time timer is reset, no longer service access is controlled.
Further, in S13 steps, PGW includes GTP-C (GPRS Tunnelling to the message that MME is sent
Protocol-Control plane, wireless universal packet tunneling protocol control) message, disappeared between PGW and MME by GTP-C
Cease the complete zero back-off time fields carried and recover APN congestion.Specifically, when the non-overloads of APN, PGW is to MME
GTP-C message is sent, instruction MME deletes back off time timer corresponding with APN to recover service access operation, so as to shorten
The break period of PGW business.
GTP-C message includes three types：Conversation request message, the wound for meeting access conditions of PGW oneself establishments
The deletion conversational response for build the establishment conversational response message of conversation request message return, returning to for deleting conversation request message disappears
Breath.Wherein, delete conversation request message also to be substituted by other management conversation request messages, as long as the request message is not to create meeting
Request message is talked about, PGW can carry complete zero back-off time fields to recover business in the response message of return.
The conversation request message created for PGW oneself, PGW send the conversation request message to MME, and instruction MME is deleted
Back off time timer corresponding with APN simultaneously recovers service access operation.Specifically, PGW is in order to inform MME itself not after negative
Lotus, shortens business interruption time, request to create message to and send to MME, complete zero back-off is equally carried in the message
Time fields, MME delete the access operation of back off time timer recovery business corresponding with APN according to the field.
For creating conversational response message, the establishment conversational response message is that PGW meets access conditions for what MME was sent
The establishment conversational response message that is returned to MME of establishment conversation request message, in the establishment conversational response message, carry complete zero
Back-off time fields with inform MME can to PGW send user access request.Foregoing access conditions includes creating meeting
Words request message meets predetermined level and/or business need；Wherein, predetermined level may include priority, time stage etc..Such as：
The establishment conversation request message highest priority that current MME is sent, even if then the request message type disappears to create session request
Breath, can still send, then PGW carries complete zero back-off time in the establishment conversational response message of return to PGW
Field recovers business；Or the time of the establishment conversation request message of current MME transmissions meets 1 grade in time stage, 1 grade is to connect
Receiving message need to send immediately, then the establishment conversation request message is immediately sent into PGW so that PGW disappears return
It can recover business along with the back-off time fields for carrying complete zero in breath；Or when the establishment session for judging MME transmissions
Request message meets business need, i.e. the establishment conversation request message be in order to inquire about the current load conditions of APN to PGW, and
Interrupting service is determined whether according to the PGW message returned；Specifically, during inquiry request message, MME is straight by the inquiry request message
Sending and receiving are given PGW and inquired about, and Query Result is returned to MME by PGW, and MME chooses whether recovery business according to Query Result, should
Complete zero back-off time fields are carried in Query Result.
For deleting conversational response message, the message is session release message, and PGW receives the session request that MME is sent and disappeared
Breath, then sent according to the deletion conversation request message to MME and delete conversational response message to indicate that it is corresponding with APN that MME deletes
Back off time timer recover service access operation.Wherein, foregoing deletion conversational response message is one of which, also may be used
To be other conversational response message, as long as the message is not the conversation message newly accessed, PGW is in corresponding response message
The back-off time fields for carrying complete zero realize business recovery.
Above-mentioned three kinds of conversation messages can be attributed to two classes, the conversation request message that the first kind creates for PGW oneself, the session
The message that request message is actively initiated for PGW is PGW in order to which the request informed MME itself carryings no longer overload and created disappears
Breath, the message include but is not limited to bearer update request；Second class is the response message that PGW is passively returned, and the response message is
The response message that returns based on the conversation request message that MME is sent, by the response message inform MME itself carryings not after
Load.
The service restoration method provided by the present embodiment, start APN overload mechanism in MME and cause PGW in back-
In the case of being unable to access service in off time time ranges, PGW by the conversational response message of return or oneself create
The back-off time fields that complete zero is carried in conversation request message inform that MME itself carries no longer overload, can recover business
Access, so as to greatly shorten business interruption time, the access efficiency of business is also improved accordingly, lifts the use of user
Experience.
Embodiment two
Another service restoration method is present embodiments provided, what the service restoration method was protected is the tool that MME sides perform
Body operating process, Fig. 2 is referred to, Fig. 2 is another service restoration method flow chart that the present embodiment provides, and its specific steps is such as
Under：
S21, APN overloads mechanism is started according to PGW instruction and grasped with interrupting the service access in the range of back off time
Make.
Specifically, when some APN on PGW is loaded beyond given threshold or reaches carrying scope, MME can receive PGW hairs
The message informing MME APN sent carrying overload, then MME is that back off time timer corresponding to the APN is set is determined
When so that the establishment conversation request message of the APN is no longer sent to PGW by MME in back-off time time ranges, when
After the back-off time times reach, it just may proceed to APN establishment conversation request message issuing PGW.Wherein, in the message
The back-off time fields and special 113 (APN congestions) failure reason values, MME for carrying non-zero are taken according in message
The information of band opens overload mechanism interrupting service access operation.
S22, in the range of the back off time and in the case of the non-overloads of APN, receive the message that PGW is sent.
Specifically, after MME opens overload mechanism according to PGW instruction, in back-off time time ranges,
Carryings of the PGW to APN detects, if the non-overloads of APN, MME can receive the back-off for carrying complete zero of PGW returns
The message of time fields, the back-off time fields can be shown that the non-overloads of APN, and resource has residue, can be normally carried out industry
Business access operation.
S23, back off time timer corresponding with the APN is deleted according to the message to recover service access operation.
Specifically, carrying complete zero back-off time fields in the message, MME deletes APN by the field and corresponded to
Back off time timer, so as to contact APN overloads mechanism recover service access operation.The back off time timer is to use
In carrying out timing to back-off time time ranges, before timing terminates, MME sends complete zero back-off time according to PGW
Timing of the field to timer terminates, namely deletes the back off time timer, is normally accessed so as to recover PGW business
Flow.
Further, in S21 steps, when MME receives the non-zero back-off time fields of PGW transmissions, to be right
The APN answered sets back off time timer, and carries out timing automatically, and the timing time length is non-zero back-off time words
Back-off time time spans in section.It is never sent to by the access service of back off time Timer Controlling user
APN corresponding to PGW is upper.Due to there is multiple APN on PGW, therefore, be on MME each APN be respectively provided with keep out of the way corresponding to one when
Between timer be timed, the multiple is two or more.After MME receives the instruction of multiple APN congestions, open
Back off time timer corresponding with each APN carries out timing, limits these APN service access.Remove above-mentioned APN congestions
Control strategy, PGW access service can be also controlled using other control strategies well known in the art, the present embodiment is to this
Do not limit.
In S22 and S23 steps, the message that MME is received includes GTP-C message, passes through GTP-C message between MME and PGW
The complete zero back-off time fields carried recover APN congestion.Specifically, when the non-overloads of APN, MME receives PGW
The GTP-C message of transmission, move back corresponding with APN is deleted according to the complete zero back-off time fields carried in the GTP-C message
Time timer is kept away to recover service access operation, so as to shorten the break period of PGW business.
GTP-C message includes three types：Conversation request message, the wound for meeting access conditions of PGW oneself establishments
The deletion conversational response for build the establishment conversational response message of conversation request message return, returning to for deleting conversation request message disappears
Breath.Wherein, delete conversation request message also to be substituted by other management conversation request messages, as long as the request message is not to create meeting
Request message is talked about, PGW can carry complete zero back-off time fields to recover business in the response message of return.
The conversation request message created for PGW oneself, MME receive the conversation request message that PGW is sent, disappeared according to this
Breath deletes back off time timer corresponding with APN and recovers service access operation.Specifically, PGW is in order to inform MME itself not
After load, shorten business interruption time, request to create message to and send to MME, equally carry complete zero in the message
Back-off time fields, the access that MME deletes back off time timer recovery business corresponding with APN according to the field are grasped
Make.
For creating conversational response message, the establishment conversational response message is the establishment session that MME will meet access conditions
Request message is sent to MME, then MME by corresponding establishment conversational response message to MME inform corresponding to APN not after negative
Lotus, access service can be continued.In the establishment conversational response message, complete zero back-off time fields are carried to inform that MME can
To send the access request of user to PGW.Foregoing access conditions includes establishment conversation request message and meets predetermined level and/or industry
Business requires；Wherein, predetermined level may include priority, time stage etc..Such as：The establishment conversation request message that current MME is sent
Highest priority, even if then the request message type can still be sent, then PGW exists to create conversation request message to PGW
The back-off time fields that complete zero is carried in the establishment conversational response message of return recover business；Or current MME transmissions
The time of establishment conversation request message meets 1 grade in time stage, and 1 grade need to send immediately to receive message, then should
Create conversation request message and be immediately sent to PGW so that PGW can be along with the back-off for carrying complete zero in the message of return
Time fields recover business；Or when judge MME send establishment conversation request message meet business need, i.e. the establishment meeting
Words request message is to determine whether to interrupt industry to load condition current PGW inquiries APN, and according to the PGW message returned
Business；Specifically, during inquiry request message, the inquiry request message is transmitted directly to PGW and inquired about by MME, and PGW will be inquired about and tied
Fruit returns to MME, and MME chooses whether recovery business according to Query Result, and complete zero back-off is carried in the Query Result
Time fields.
For deleting conversational response message, the message is session release message, and MME sends conversation request message to PGW, so
The deletion conversational response message that PGW is sent according to the deletion conversation request message is received afterwards, according to the deletion conversational response message
The complete zero back-off time fields of middle carrying delete back off time timer corresponding with APN to recover service access operation.
Wherein, foregoing deletion conversational response message is response message one of which or other conversational response message, as long as
The message is not the conversation message newly accessed, and PGW can carry complete zero back-off time words in corresponding response message
Duan Shixian business recoveries.
Above-mentioned three kinds of conversation messages can be attributed to two classes, the conversation request message that the first kind creates for PGW oneself, the session
The message that request message is actively initiated for PGW is PGW in order to which the request informed MME itself carryings no longer overload and created disappears
Breath, the message include but is not limited to bearer update request；Second class is the response message that PGW is passively returned, and the response message is
The response message that returns based on the conversation request message that MME is sent, by the response message inform MME itself carryings not after
Load.
The service restoration method that the present embodiment provides so that the complete zero back-off time fields that MME is sent according to PGW
Back off time timer corresponding with APN is deleted, and then releases APN overload mechanism, the service access for recovering user in advance please
Ask, greatly shorten the time of this PGW service disconnection, make the recovery of APN overloads more flexible.
Embodiment three
The present embodiment is based on embodiment one, and in conjunction with the embodiments two, service restoration method is described further, its
In, PGW exemplified by deleting conversational response message, explains to the message that MME is sent to the session flow between PGW and MME.
It need to understand, the session flow between PGW and MME need to meet following premise：PGW overloads, and in conversational response message is created
The back-off time fields for carrying non-zero notify some APN of MME overloads to MME, and MME sets corresponding with the APN fixed
When device, start overload mechanism.On this basis, Fig. 3 is referred to, its idiographic flow is as follows：
S31, terminal initiate deactivation request to MME.
Specifically, deactivation can be understood as, terminal is offline, releasing session, relative with reaching the standard grade.Namely under terminal is asked to MME
Line, terminate current session, the situation that the releasing session flow that 3GPP agreements allow terminal to initiate starts in APN overloads mechanism
Lower normal execution.
S32, MME receive the backward SGW (Serving GateWay, gateway) of request and initiate to delete session request.
The deletion session request is transmitted to PGW by S33, SGW.
S34, PGW send to SGW and delete conversational response message.
Specifically, carrying complete zero back-off time fields in the deletion conversational response message, the field is used to represent
APN overloads.In addition, PGW is sent to SGW before deleting conversational response message, can detect APN it is current whether overload, if
APN still overloads, then PGW complete zero back-off will not be carried in the deletion conversational response message for returning to SGW
Time fields；If APN no longer overloads, PGW carries complete zero back- in the deletion conversational response message for returning to SGW
Off time fields.Certainly, also can before S33 steps just detection APN whether overload, when receive SGW forwarding meeting
After words request, complete zero back-off time fields are directly carried in the deletion conversational response message returned to SGW, with section
Save business interruption time.The present embodiment illustrates by taking the current non-overloads of APN as an example to this programme.
S35, SGW are transmitted to MME by conversational response message is deleted.
Specifically, in the case of the non-overloads of APN, complete zero back-off is carried in the deletion conversational response message
Time fields.
S36, MME delete back off time timer corresponding with APN to recover according to the deletion conversational response message of reception
Service access operates.
Specifically, MME is determined back off time according to the complete zero back-off time fields deleted in conversational response message
When device deleted so that MME release APN overload mechanism, recover service access operation.
Example IV
The present embodiment is based on embodiment one, and in conjunction with the embodiments two and embodiment three, service restoration method is done into one
The explanation of step, wherein, PGW to the message that MME is sent exemplified by creating conversational response message, to the session stream between PGW and MME
Journey explains.Session flow between PGW and MME equally meets the premise described in embodiment three, repeats no more here.
On the basis of this, Fig. 4 is referred to, its idiographic flow is as follows：
S41, terminal initiate the access request of high-priority users to MME.
Specifically, it is specified that the access request of part high priority can be in the back-off time times in 3GPP agreements
In the range of carry out normal conversation, therefore, PGW can by the access request of high priority to MME send response message inform MME from
Body no longer overload.
S42, MME initiate to create session request after receiving access request to SGW.
Specifically, after MME receives access request, first determine whether the user is high-priority users, in the user
In the case of for high-priority users, it can just initiate to create session request to SGW；If the user is not high-priority users,
MME refuses to initiate to create session request to SGW.
S43, SGW are forwarded to PGW by session request is created.
S44, PGW send to SGW and create response message.
Specifically, carrying complete zero back-off time fields in the establishment conversational response message, the field is used to represent
APN overloads.In addition, PGW is sent to SGW before creating conversational response message, can detect APN it is current whether overload, if
APN still overloads, then PGW complete zero back-off will not be carried in the establishment conversational response message for returning to SGW
Time fields；If APN no longer overloads, PGW carries complete zero back- in the deletion conversational response message for returning to SGW
Off time fields.The present embodiment illustrates by taking the current non-overloads of APN as an example to this programme.
S45, SGW are sent to MME by response message is created.
Specifically, in the case of the non-overloads of APN, complete zero back-off is carried in the establishment conversational response message
Time fields.
S46, MME delete back off time timer corresponding with the APN to recover service access operation.
Specifically, MME is determined back off time according to the complete zero back-off time fields created in conversational response message
When device deleted so that MME release APN overload mechanism, recover service access operation.
Embodiment five
The present embodiment is based on embodiment one, and in conjunction with the embodiments two and embodiment three, service restoration method is done into one
The explanation of step, wherein, PGW to the message that MME is sent by taking bearer update request message as an example, to the session stream between PGW and MME
Journey explains.Session flow between PGW and MME equally meets the premise described in embodiment three, repeats no more here.
On the basis of this, Fig. 5 is referred to, its idiographic flow is as follows：
S51, PGW initiate the bearer update request message of any carrying under APN to SGW.
Specifically, detect APN no longer overloads in PGW, and when the back-off time times not yet reach, PGW can hand
Dynamic or one bearer update request message of automatic transmission, the APN overloads of this bearing association of instruction MME have released.The carrying is more
Complete zero back-off time fields are carried in new request message.
Bearer update request message is sent to MME by S52, SGW.
Specifically, complete zero back-off time fields are equally carried in the bearer update request message.
S53, MME delete back off time timer corresponding with APN to recover service access operation.
Specifically, complete zero back-off time fields of the MME in bearer update request message is determined back off time
When device deleted so that MME release APN overload mechanism, recover service access operation.
Embodiment six
The present embodiment is and one corresponding device embodiment of embodiment, there is provided a kind of packet data gateway, in embodiment
On the basis of one, the present embodiment no longer will elaborate to each module in the Packet Data Network Central Shanxi Plain.Fig. 6 is referred to, Fig. 6 is this
The packet data gateway schematic diagram that embodiment provides, the gateway include：
Load indicating module 61, for indicating that MME starts APN overloads mechanism to interrupt the industry in the range of back off time
Business access operation；
Load detection module 62, in the range of back off time, detection APN whether overload；
Sending module 63, for when the non-overloads of APN, sending message to MME, instruction MME deletes corresponding with the APN
Back off time timer to recover service access operation, complete zero back off time field is carried in the message.
Specifically, when when being loaded beyond given threshold or reaching setting carrying scope of some APN, load instruction on PGW
Module 61 sends the access of message informing MME interrupting services to MME, wherein, the back-off of carrying non-zero in the message
Time fields and special 113 (APN congestions) failure reason values, back-off time represent a period of time, in this time model
In enclosing, the session of the APN can not be issued corresponding PGW by MME, after back-off time are reached, could recover connecing for business
Enter operation.After MME receives the message, one back off time timer (back-off timer) is set for the APN, passed through
Back off time Timer Controlling APN session no longer accesses this PGW in back-off time time ranges, so as in
Disconnected PGW service access operation.
When the APN overloads on PGW, PGW can indicate that MME performs APN congestion control policies, in back-off time
Interrupting service access operation in (i.e. back off time) time range so that the APN does not continue to overload.Certainly, in back-
In off time time ranges, PGW detects to APN load condition, when load detection module 62 detect APN not after
During load, the proactive notification MME APN no longer overloads, service access operation can be continued.
In the case of the non-overloads of APN, resources left, and message once was transmitted across to MME before APN, and notified MME itself
Overload is carried, the no longer access service in back-off time time ranges, based on both of the aforesaid condition, sending module 63
Message informing MME APN no longer overloads actively are sent to MME, service access can be continued, MME deletes according to the message
Except back off time timer corresponding to APN, the limitation to APN access service is terminated.
It can pass through controller for the function of above-mentioned load indicating module 61, load detection module 62 and sending module 63
To realize.
The present embodiment provide packet data gateway, can MME start APN overload mechanism in the case of, pass through to
MME sends the message instruction MME APN no longer overloads for carrying complete zero back-off time fields, so as to shorten service disconnection
Time, greatly improve the usage experience of user.
Embodiment seven
The present embodiment is and two corresponding device embodiment of embodiment, there is provided a kind of mobility management entity, is implementing
On the basis of example two, the present embodiment no longer will elaborate to each module in mobility management entity.Refer to Fig. 7, Fig. 7
The mobility management entity schematic diagram provided for the present embodiment, the mobility management entity include：
Load mechanism starting module 71, for starting APN overloads mechanism according to PGW instruction to interrupt in back off time
In the range of service access operation；
Receiving module 72, in the range of back off time and in the case of the non-overloads of APN, receiving disappearing for PGW transmissions
Breath；
Timer removing module 73, for deleting back off time timer corresponding with APN according to the message to recover industry
It is engaged in access operation, complete zero back off time field is carried in the message.
Specifically, when some APN on PGW is loaded beyond given threshold or reaches carrying scope, MME can receive PGW hairs
The message informing MME APN sent carrying overload, then load mechanism starting module 71 is to keep out of the way corresponding to the APN is set
Time timer is timed so that MME is in back-off time time ranges no longer by the establishment session request of the APN
Message is sent to PGW.Wherein, complete zero back-off time fields are carried in the message, the back-off time fields are
The non-overloads of APN are can be shown that, resource has residue, can be normally carried out service access operation.
After MME opens overload mechanism according to PGW instruction, in back-off time time ranges, PGW is to APN
Carrying detected, if the non-overloads of APN, receiving module 72 can receive PGW return carry complete zero back-off
The message of time fields, the back-off time fields can be shown that the non-overloads of APN, and resource has residue, can be normally carried out industry
Business access operation.
After the message for receiving PGW transmissions, timer removing module 73 sends complete zero back-off time words according to PGW
Timing of the section to timer terminates, namely deletes the back off time timer, so as to recover the normal incoming stream of PGW business
Journey.
The mobility management entity that the present embodiment provides, it can pass through in the case where MME starts APN overload mechanism
The message for the complete zero back-off time fields of carrying that PGW is sent deletes back off time timer to recover service access operation,
So as to shorten business interruption time, the usage experience of user is greatly improved.
In addition, the present embodiment also provides a kind of business recovery system, Fig. 8 is referred to, the system includes：Packet data gateway
81st, gateway 82 and mobility management entity 83；Wherein, packet data gateway 81 sends message, institute to gateway 82
State and complete zero back-off time fields are carried in message；Gateway 82 sends the message to mobility management entity 83；
Mobility management entity 83 receives the message, and carries out business recovery according to the message.
Obviously, those skilled in the art should be understood that each module of the embodiments of the present invention or each step can be used
General computing device realizes that they can be concentrated on single computing device, or be distributed in multiple computing device institutes
On the network of composition, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to by they
It is stored in storage medium (ROM/RAM, magnetic disc, CD) and is performed by computing device, and in some cases, can be with not
The order being same as herein performs shown or described step, or they are fabricated to each integrated circuit modules respectively, or
Multiple modules or step in them are fabricated to single integrated circuit module to realize by person.So the present invention is not restricted to appoint
What specific hardware and software combines.
Above content is to combine the further description that specific embodiment is made to the embodiment of the present invention, it is impossible to is recognized
The specific implementation of the fixed present invention is confined to these explanations.For general technical staff of the technical field of the invention,
Without departing from the inventive concept of the premise, some simple deduction or replace can also be made, should all be considered as belonging to the present invention
Protection domain.
Claims (11)
1. a kind of service restoration method, including：
Indicate that mobility management entity starts access point overload mechanism and grasped to interrupt the service access in the range of back off time
Make；
In the range of the back off time, detection access point whether overload；
When the non-overload of access point, to mobility management entity send message, instruction mobility management entity delete with it is described
Back off time timer corresponding to access point carries complete zero back off time word to recover service access operation in the message
Section.
2. service restoration method as claimed in claim 1, it is characterised in that the message includes wireless universal packet tunnel association
Control message is discussed, described to send message to mobility management entity, instruction mobility management entity deletes back off time timer
Included with recovering service access operation：
Wireless universal packet tunneling protocol control message is sent to mobility management entity, instruction mobility management entity deletes institute
Back off time timer is stated to recover service access operation.
3. service restoration method as claimed in claim 2, it is characterised in that described to send general nothing to mobility management entity
Line is grouped tunneling protocol control message, and instruction mobility management entity deletes the back off time timer to recover service access
Operation includes：
The wireless universal packet tunneling protocol control message includes the conversation request message that packet data gateway creates, to movement
Property management entity send the conversation request message, instruction mobility management entity deletes the back off time timer to recover
Service access operates；Or
The wireless universal packet tunneling protocol control message includes creating conversational response message, receives mobility management entity hair
That send meets the establishment conversation request message of access conditions, is sent out according to the establishment conversation request message to mobility management entity
The establishment conversational response message is sent, instruction mobility management entity deletes the back off time timer to recover service access
Operation；Or
The wireless universal packet tunneling protocol control message includes deleting conversational response message, receives mobility management entity hair
The deletion conversation request message sent, the deletion session is sent to mobility management entity according to the deletion conversation request message
Response message, instruction mobility management entity delete the back off time timer to recover service access operation.
4. service restoration method as claimed in claim 3, it is characterised in that the access conditions includes：
The establishment conversation request message meets predetermined level；And/or
The establishment conversation request message business need.
5. a kind of service restoration method, including：
Start access point overload mechanism according to the instruction of packet data gateway to connect to interrupt the business in the range of back off time
Enter operation；
In the range of the back off time and in the case of the non-overload of access point, the message that packet data gateway is sent is received；
Back off time timer corresponding with described access point is deleted according to the message to recover service access operation, it is described to disappear
Complete zero back off time field is carried in breath.
6. service restoration method as claimed in claim 5, it is characterised in that the message includes wireless universal packet tunnel association
Control message is discussed, back off time timer corresponding with described access point is deleted according to the message to recover service access operation
Including：
Tunneling protocol control message is grouped according to the wireless universal and deletes the back off time timer to recover service access
Operation.
7. service restoration method as claimed in claim 6, it is characterised in that tunnel protocol control is grouped according to the wireless universal
Message processed deletes the back off time timer to be included with recovering service access operation：
The wireless universal packet tunneling protocol control message includes the conversation request message that packet data gateway creates, and receives and divides
The conversation request message that group data gateway is sent, according to the conversation request message delete the back off time timer with
Recover service access operation；Or
The wireless universal packet tunneling protocol control message includes creating conversational response message, is sent to packet data gateway full
The establishment conversation request message of sufficient access conditions, receive the wound that packet data gateway is sent according to the establishment conversation request message
Conversational response message is built, the back off time timer is deleted according to the establishment conversational response message to recover service access behaviour
Make；Or
The wireless universal packet tunneling protocol control message includes deleting conversational response message, sends and deletes to packet data gateway
Except conversation request message, the deletion conversational response that the packet data gateway is sent according to the deletion conversation request message is received
Message, the back off time timer is deleted according to the deletion conversational response message to recover service access operation.
8. service restoration method as claimed in claim 7, it is characterised in that the access conditions includes：
The establishment conversation request message meets predetermined level；And/or
The establishment conversation request message meets business need.
9. a kind of packet data gateway, including：Load indicating module, load detection module and sending module；
The load indicating module is used to indicate that mobility management entity starts access point overload mechanism to interrupt when keeping out of the way
Between in the range of service access operation；
The load detection module be used in the range of the back off time, detection access point whether overload；
The sending module is used for when the non-overload of access point, sends message to mobility management entity, indicates mobility pipe
Reason entity deletes back off time timer corresponding with described access point to recover service access operation, is carried in the message complete
Zero back off time field.
10. a kind of mobility management entity, including：Overload mechanism starting module, receiving module and timer removing module；
The load mechanism starting module is used to start access point overload mechanism according to the instruction of packet data gateway to interrupt
Service access operation in the range of back off time；
The receiving module is used in the range of the back off time and in the case of the non-overload of access point, receives grouped data
The message that gateway is sent；
The timer removing module be used for according to the message delete corresponding with described access point back off time timer with
Recover service access operation, complete zero back off time field is carried in the message.
11. a kind of business recovery system, including：Gateway, packet data gateway as claimed in claim 9 and such as right
It is required that the mobility management entity described in 10；
The packet data gateway sends message to gateway, and complete zero back off time field is carried in the message；
The gateway sends the message to the mobility management entity；
The mobility management entity receives the message, and carries out business recovery according to the message.
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| CN201610460665.XA CN107529194A (en) | 2016-06-22 | 2016-06-22 | Service restoration method and system, packet data gateway and mobility management entity |
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