CN102884832B

CN102884832B - Method and system for network congestion processing

Info

Publication number: CN102884832B
Application number: CN201180000547.6A
Authority: CN
Inventors: 郭小龙; 国炜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2011-05-11
Filing date: 2011-05-11
Publication date: 2015-06-03
Anticipated expiration: 2031-05-11
Also published as: WO2011124173A3; CN102884832A; WO2011124173A2

Abstract

A method and system for network congestion processing are disclosed in the embodiments of the present invention. The method includes the steps of: performing, at the time of congestion control start for a terminal, separation delay control, which is used to delay the time for separation operation start corresponding to the terminal; and executing a hidden separation operation for the terminal or executing the hidden separation operation and a deactivation Idle mode Signaling Reduction (ISR) operation for the terminal when the time for separation operation start arrives, wherein a delay value of the time for separation operation start is equals to or is greater than a period of the congestion control for the terminal.; The embodiments of the present invention delay the time for separation operation start in order to ensure that the hidden separation operation and the deactivation ISR operation for the terminal are not executed at least in the process of the congestion control, thus improving the system efficiency.

Description

Network congestion processing method and system

Technical field

The embodiment of the present invention relates to wireless communication field, and more specifically, relates to network congestion processing method and system.

Background technology

In current cellular communications networks, core net management entity, as SGSN (Servicing GPRS Support Node; Serving GRPS support node), MME (Mobility Management Entity; Mobility Management Entity) all can give each terminal assignments one-period position renewing timer, such as, at SAE (System Architecture Evolution; System Architecture Evolution)/LTE (Long Term Evolution; Long Term Evolution) be PTAUT (Periodical Tracking Area Update Timer in network; Periodic Tracking Area upgrades timer).Terminal will do periodic location updating according to this timer, and namely when this timer expires, terminal will launch position more new technological process.And at network side, core net mobile management entity can reach timer (MRT for each terminal preserves a movement; Mobile Reachable Timer).The value of MRT timer can upgrade timer slightly length than period position a little, if also do not receive the location update message that terminal is initiated when MRT timer expires, then network entity will think that now terminal is not within the scope of network service, removes paging simultaneously and carries out mark P PF (Paging Proceed Flag) and start a configurable timer.The result removing PPF is exactly this network entity no longer calling user.When this configurable timer expires, this user is just done implicit detach by network.As excited users Idle state signaling reduction ISR (Idle mode Signalling Reduction), if configurable timer expires, network, except doing except implicit detach by user, also will carry out deexcitation ISR operation.

MTC (Machine Type Communication; Machine type communication) apply the network communication referring to and carry out when not needing artificial participation between one or more network element, i.e. M2M (Machine to Machine; Machine To Machine) application, as application such as traffic control and management, factory's monitoring, remote meter readings.Apply for a large amount of MTC, mobile network is very competitive.But current mobile network is mainly for H2H (Human to Human; Human To Human) apply and carry out various optimization and construction, and to M2M, M2H (Machine to Human; Machine is to people), H2M (Human to Machine; Human-to-Machine) optimization of applying and build considerably less.In MTC application, there is multiple M2ME (M2M Entity that identical MTC applies; M2M entity) form a whole, be called for short group.Group can integrally carry out managing or controlling by Virtual network operator or industry user.Group identification is used to the mark identifying and distinguish distinct group.The remote meter reading application of such as power industry, ammeters all for a certain area can be formed a group by us, and this group integrally can be carried out mobile management optimization or access-in management by Virtual network operator and power industry user.

In current standard, definition is when network occurs congested, M2M equipment relative to H2H equipment (such as, cellphone subscriber) priority level is lower, so just cause access network entity (as RNC, eNB) preferentially refusal M2M equipment, the stand-by period (extended wait time) of simultaneously distributing an expansion to equipment in refuse information ensures that this M2M equipment all can not initiate access network request again within a very long time.Access network entity also can refuse the request that normal cellphone subscriber initiates access network, and the stand-by period that instruction one is shorter in refuse information, this value ensures that this cellphone subscriber during this period of time can not initiate the request of access network.Meanwhile, by being similar to S1 interface, core network entity (as MME), when occurring congested, also can inform that access network entity will refuse the access request of which user.

When core net mobile management entity (as SGSN, MME) occurs congested time, can by being similar to overload start (congestion control starts) the news access network entity of S1 interface (as eNB, RNC) RRC starting to refuse some type terminals sets up request, and these types can be defined by the overload action in overload start message.Currently define 5 types:

Refusal low priority UE;

The UE of refusal low priority UE and initiation data service;

Refusal low priority UE and the UE initiating data, signaling;

Only allow the UE initiating urgent call and page response;

Only allow the UE of high priority UE and page response.

Access network entity (as eNB) is according to UE (User Equipment; Subscriber equipment) setting up RRC (Radio Resource Control; Wireless heterogeneous networks) set up reason to refuse the request of the access network of some classification UE in request message, and in refuse information, carry a wait time value to UE, when this UE belongs to the user of low priority, network can carry a long extended wait time to UE in connection request refuse information.The RRC that such UE can not initiate any reason before wait time expires sets up request.Current RRC sets up reason following a few class:

Low priority (low priority);

Rise and exhale data;

Rise and exhale signaling;

Page response;

Urgent call;

High priority (high priority).

Access network entity (as eNB, RNC) gives UE extended wait time value of low priority in RRC connection refused message, this value will forbid that UE sends registration request, position updating request and business request information in this time range, even if the period position that during this period of time UE preserves upgrades timer (PTAUT) and expires, it does not allow to send location update request message yet.And access network entity is ignorant to this extended wait time value MME of UE, before causing the MRT preserved as MME to expire, the period position update request that UE sends out also can not be received like this.When the MRT of MME expires, MME will perform and removes PPF mark and open configurable timer.When MRT timer expires, if there is the downlink data of UE, MME also can not this UE of paging, and when configurable timer expires, user will be done implicit detach by network, if UE is that network also will carry out deactivating operation to ISR under activation ISR state.If UE is follow-up be linked into network again, handling process will extend, and causes system effectiveness to reduce.

Summary of the invention

The embodiment of the present invention provides a kind of network congestion processing method and system, can improve system effectiveness.

On the one hand, provide a kind of network congestion processing method, comprise: when the congestion control for terminal starts, execution segregation lag controls, above-mentioned segregation lag controls for extending the lock out operation start-up time corresponding with described terminal, when above-mentioned lock out operation arrives start-up time, implicit detach operation is carried out to described terminal or implicit detach operation is carried out to above-mentioned terminal and deexcitation Idle state signaling reduction ISR operates, wherein, the prolongation value of lock out operation start-up time is equal to, or greater than the cycle of the congestion control for terminal.

On the other hand, provide a kind of network congestion treatment system, comprising: know device, for knowing that the congestion control for terminal starts; Control device, when the congestion control for terminal starts, execution segregation lag controls, above-mentioned segregation lag controls for extending the lock out operation start-up time corresponding with described terminal, when above-mentioned lock out operation arrives start-up time, implicit detach operation is carried out to described terminal or implicit detach operation is carried out to above-mentioned terminal and deexcitation Idle state signaling reduction ISR operates, wherein, the prolongation value of lock out operation start-up time is equal to, or greater than the cycle of the congestion control for terminal.

The embodiment of the present invention postpones lock out operation start-up time, to ensure at least can not to carry out implicit detach to terminal in congestion control procedure and deexcitation ISR operates, thus improves system effectiveness.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the schematic block diagram of the framework example of the MTC application of the application embodiment of the present invention.

Fig. 2 is the schematic flow diagram of network congestion processing method according to an embodiment of the invention.

Fig. 3 A is the schematic flow diagram of network congestion processing method according to another embodiment of the present invention.

Fig. 3 B is the schematic flow diagram of network congestion processing method according to another embodiment of the present invention.

Fig. 3 C is the schematic flow diagram of network congestion processing method according to another embodiment of the present invention.

Fig. 3 D is the schematic flow diagram of network congestion processing method according to another embodiment of the present invention.

Fig. 3 E is the schematic flow diagram of network congestion processing method according to another embodiment of the present invention.

Fig. 3 F is the schematic flow diagram of network congestion processing method according to an embodiment of the invention.

Fig. 4 is the schematic flow diagram of network congestion processing procedure according to an embodiment of the invention.

Fig. 5 is the schematic flow diagram of network congestion processing procedure according to another embodiment of the present invention.

Fig. 6 is the schematic block diagram of the network congestion treatment system according to the embodiment of the present invention.

Fig. 7 A is the schematic block diagram of equipment of the core network according to an embodiment of the invention.

Fig. 7 B is the schematic block diagram of network congestion treatment system according to another embodiment of the present invention.

Fig. 8 is the schematic block diagram of equipment of the core network according to an embodiment of the invention.

Fig. 9 is the schematic block diagram of access network equipment according to an embodiment of the invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Technical scheme of the present invention, various communication system can be applied to, such as: code division multiple access (CDMA, Code Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access Wireless), GPRS (GPRS, General Packet Radio Service), Long Term Evolution (LTE, Long Term Evolution) etc.

Mobile terminal (Mobile Terminal), also mobile subscriber (UE can be referred to as, User Equipment), mobile subscriber equipment etc., can through wireless access network (such as, RAN, Radio Access Network) communicate with one or more core net, mobile terminal can be mobile phone (or being called " honeycomb " phone) and the computer with mobile terminal, such as, can be portable, pocket, hand-hold type, built-in computer or vehicle-mounted mobile device, they and wireless access network exchange language and/or data.

Base station, can be the base station (BTS in GSM or CDMA, Base Transceiver Station), also can be the base station (NodeB) in WCDMA, can also be the evolved base station (eNB or e-NodeB, evolutional Node B) in LTE, the present invention limit, but for convenience of description, following embodiment is described for eNB.

Fig. 1 is the schematic block diagram of the framework example of the MTC application of the application embodiment of the present invention.Along with development, later network architecture diagram may unlike this, and the embodiment of the present invention does not limit this.

As shown in Figure 1, mobile management network element, MTC Server (MTC application server), access network elements, HSS (Home Subscriber Server is mainly comprised in the framework that MTC applies; Home subscriber server) etc. logical functionality.Wherein mobile management network element, is responsible for NAS (Non-Access Stratum; Non-Access Stratum) signaling and the encryption of NAS signaling and the function such as roaming, tracking, distributing user temporary identifications, safety function etc.MTC server, for storing data or the information of UE or faciation pass.HSS mainly stores the subscription data of UE or faciation pass.The subscription data of UE refers to the subscription data of each UE as individuality; The subscription data of group refers to the data that group each UE interior is common or subscription data.

The embodiment of the present invention for be following scene: when access network entity have rejected the RRC connection request of UE, and in refuse information, being indicated to the stand-by period (extended wait time) of UE mono-expansion, waiting time (or being called back off time) interior UE can not initiate the request (position updating request initiated when the period position renewal timer PTAUT wherein comprising UE side expires) of the access network caused due to any reason.Core net mobile management entity does not also know that access network entity is to this stand-by period of UE, causes core network entity to carry out implicit detach operation to after date to user and deexcitation ISR operates (the latter only performs when activating ISR) at MRT and configurable timer like this.Like this, if UE is follow-up be linked into network again, handling process will extend, and the performance of network will reduce.

The method of the embodiment of the present invention is suitable for solving the problem in above-mentioned situation, and ensure that under this network congestion, core net can not carry out implicit detach to user ahead of time and deexcitation ISR operates.

201, when the congestion control for terminal starts, execution segregation lag controls, described segregation lag controls for extending the lock out operation start-up time corresponding with this terminal, carries out implicit detach operation or carry out implicit detach operation to this terminal and deexcitation Idle state signaling reduction ISR operates when lock out operation arrives start-up time to this terminal.

Wherein, the prolongation value of lock out operation start-up time is equal to, or greater than the cycle of the congestion control for terminal.

As an example, cycle of the congestion control of terminal refer to from the congestion control time started (such as, send when starting message overload start for the congestion control of terminal) to cycle of congestion control end time when message overload stop (congestion control such as, sent for terminal stop).

In an embodiment, extend the lock out operation corresponding with this terminal to comprise start-up time: extend the checkout time value that the paging corresponding with this terminal is carried out indicating, remove the paging corresponding with this terminal to indicate when this checkout time value arrives, and start configurable timer, when configurable timer expires, implicit detach operation is carried out to described terminal or deexcitation Idle state signaling reduction ISR operates; Wherein, the prolongation value of checkout time value is equal to, or greater than the cycle of the congestion control for terminal.In the embodiment of the present invention, extend checkout time value that the paging corresponding with this terminal carry out indicating and can represent increase time value outside timer, or represent the time value of replacing original timer by longer time value.

In another embodiment, extend the lock out operation corresponding with this terminal to comprise start-up time: remove the paging corresponding with this terminal when the checkout time value that the paging that this terminal is corresponding is carried out indicating arrives and carry out indicating but do not start configurable timer, and after scheduled duration, start configurable timer, when this configurable timer expires, implicit detach operation is carried out to described terminal or deexcitation Idle state signaling reduction ISR operates; Wherein, this checkout time value and scheduled duration sum are equal to, or greater than the cycle of the congestion control for terminal.

The method of Fig. 2 can be performed by network side system, such as core network entity (such as MME/SGSN) or access network entity (such as eNB).Segregation lag controls to refer to that implicit detach from MRT to terminal and possible deexcitation ISR operate the Timer Controlling process between (when activating ISR), comprises the control to the control of MRT itself or other timers (such as configurable timer described below and/or additional timer) based on MRT operation.The embodiment of the present invention performs segregation lag by various ways and controls.Mode is the operation behavior directly changing core network entity, and another kind of mode is the timer operation being changed network side by signaling.

First the embodiment of the operation behavior changing core network entity is described.Fig. 3 A is the schematic flow diagram of network congestion processing method according to an embodiment of the invention.The method of Fig. 3 A performs primarily of equipment of the core network (mobile management network element MME or SGSN etc. such as, in Fig. 1).In the embodiment of Fig. 3 A,

200, before the congestion control for terminal starts, the movement started for terminal can reach timer MRT.

201a, stops MRT when sending and starting message overload start for the congestion control of terminal, reopens MRT when sending the congestion control stopping message overload stop for terminal.201a is an embodiment of in Fig. 1 201.

After the MRT reopened expires, open configurable timer again (such as, can be existing configurable timer), and perform the implicit detach of terminal when this configurable timer expires and deexcitation ISR operates (the latter only performs when activating ISR).Now implicit detach or deexcitation ISR operation is later than the congestion control end time (when namely sending the congestion control stopping message overload stop for terminal).Like this, the embodiment of the present invention changes the operation behavior of core network entity, and the implicit detach and the deexcitation ISR that are delayed terminal operate, and improve system effectiveness.

Fig. 3 B is the schematic flow diagram of network congestion processing method according to another embodiment of the present invention.The method of Fig. 3 B performs primarily of equipment of the core network (mobile management network element MME or SGSN etc. such as, in Fig. 1).The difference of Fig. 3 B and Fig. 3 A is:

201b, starts the long MRT of Message Time Delay and/or configurable timer for the congestion control of terminal sending, makes the expiration time of configurable timer be later than the congestion control end time.

The present embodiment can extend MRT, can extend configurable timer, also can extend both, only needs the expiration time of configurable timer to be later than the congestion control end time.The implicit detach of terminal is performed again and deexcitation ISR operates (the latter only performs when activating ISR) when configurable timer expires.Now implicit detach or deexcitation ISR operation is later than the congestion control end time.Like this, the embodiment of the present invention changes the operation behavior of core network entity, is delayed the implicit detach of terminal and deexcitation ISR operates (the latter only activate in ISR situation perform), improves system effectiveness.

Fig. 3 C is the schematic flow diagram of network congestion processing method according to another embodiment of the present invention.The method of Fig. 3 C performs primarily of equipment of the core network (mobile management network element MME or SGSN etc. such as, in Fig. 1).The difference of Fig. 3 C and Fig. 3 A is:

201c, when network occurs that in congested process, MRT expires, do not remove the PPF of terminal, do not open configurable timer, and open an additional timer, or open additional timer when sending the congestion control stopping message overload stop for terminal, remove PPF when this additional timer expires and also open configurable timer, the expiration time of configurable timer is later than the congestion control end time.

The present embodiment is first undo (remove PPF and open configurable timer) after MRT expires, but open an additional timer or by the time stop opening this additional timer again when controlling congested, after this additional timer expires, just open configurable timer, make the expiration time of configurable timer be later than the congestion control end time.The implicit detach of terminal is performed again and deexcitation ISR operates (the latter only performs when activating ISR) when configurable timer expires.Now implicit detach or deexcitation ISR operation is later than the congestion control end time.Like this, the embodiment of the present invention changes the operation behavior of core network entity, is delayed the implicit detach of terminal and deexcitation ISR operates (the latter only activate in ISR situation perform), improves system effectiveness.

Alternatively, as an embodiment, the expiration time of additional timer can be configured as required/adjust, as long as can ensure that the expiration time of configurable timer is later than the congestion control end time.

Fig. 3 D is the schematic flow diagram of network congestion processing method according to another embodiment of the present invention.The method of Fig. 3 D performs primarily of equipment of the core network (mobile management network element MME or SGSN etc. such as, in Fig. 1).The difference of Fig. 3 D and Fig. 3 A is:

201d, when network occurs that in congested process, MRT expires, remove PPF, do not open configurable timer, stopping opening additional timer during message overload stop for the congestion control of terminal when sending, opening configurable timer when this additional timer expires.

The present embodiment removes PPF after MRT expires, but does not open configurable timer, but by the time stops increasing an additional timer again when controlling congested, after this additional timer expires, just open configurable timer.The implicit detach of terminal is performed again and deexcitation ISR operates (the latter only performs when activating ISR) when configurable timer expires.Now implicit detach or deexcitation ISR operation is later than the congestion control end time.Like this, the embodiment of the present invention changes the operation behavior of core network entity, is delayed the implicit detach of terminal and deexcitation ISR operates (the latter only performs when activating ISR), improves system effectiveness.

Alternatively, as an embodiment, the expiration time of additional timer can be configured as required/adjust.

Fig. 3 E is the schematic flow diagram of network congestion processing method according to another embodiment of the present invention.The method of Fig. 3 E performs primarily of equipment of the core network (mobile management network element MME or SGSN etc. such as, in Fig. 1).The difference of Fig. 3 E and Fig. 3 A is:

201e, when network occurs that in congested process, MRT expires, remove PPF and open configurable timer, additional timer is opened when this configurable timer expires, the expiration time of additional timer is later than the congestion control end time, does implicit detach or deexcitation ISR operates when this additional timer expires to terminal.

The present embodiment is still removed PPF and is opened configurable timer after MRT expires, but do not perform implicit detach immediately when configurable timer expires, but first increasing an additional timer, the expiration time of additional timer is later than the congestion control end time.After this additional timer expires, just carry out implicit detach and deexcitation ISR operate (the latter only performs when activating ISR).Now implicit detach or deexcitation ISR operation is later than the congestion control end time.Like this, the embodiment of the present invention changes the operation behavior of core network entity, is delayed the implicit detach of terminal, improves system effectiveness.

Alternatively, as an embodiment, the expiration time of additional timer can be configured as required/adjust, as long as can ensure that the expiration time of additional timer is later than the congestion control end time.

For in 201b time expand value and 201c-201e in the value of additional timer, network can pre-set in configuration Network Based, or a configurable value is arranged to the UE of each class, or the embodiment be similar to below described in Fig. 4-Fig. 5 transmits these time values by interface message.

Access network entity (as RNC, eNB) is receiving after congestion control that core network entity (as SGSN, MME) transmits starts message, start the RRC connection establishment request refusing certain classification UE, the type of the UE refused starts to define in message at congestion control.The certain operations behavior that defines core network entity after congestion control starts message be sent to access network entity to ensure to cause core network entity to carry out implicit detach to user ahead of time because of the refusal of access network entity and deexcitation ISR operates (the latter only performs when activating ISR) at core network entity.

For above-mentioned segregation lag control operation for the type of terminal UE, start the different controlling behavior in message according to congestion control, following situation can be divided into:

Reject delay tolerant traffic-operates low priority UE;

Reject mo-data and delay tolerant-operates low priority UE;

Reject mo-data, mo-signaling and delay tolerant-operates all UE;

Only permit emergency and mt-operates all UE;

Only permit high priority and mt-operates all UE.

Certainly, the wait time time of generally distributing low priority UE due to eNB is long, so core network entity only can carry out the operation shown in Fig. 2 A-Fig. 2 E to low priority terminal.In addition, core network entity can perform any one operation shown in Fig. 2 A-Fig. 2 E to terminal, and the embodiment of the present invention is not limited in this respect.

Described above is the embodiment of the operation changing core network entity, the embodiment of the present invention can also pass through interface signaling, the corresponding timer at synchronous lengthening terminal and equipment of the core network place, carries out implicit detach ahead of time to ensure can not to cause because of the refusal of access network entity core network entity by user and deexcitation ISR operates (the latter only performs when activating ISR).

Fig. 3 F is the schematic flow diagram of network congestion processing method according to an embodiment of the invention.The difference of Fig. 3 F and Fig. 3 A is:

201f, extends the periodical position renewing timer PTAUT of end, and extends equipment of the core network place and can reach timer MRT for the movement of terminal, and the MRT after prolongation is longer than the PTAUT after prolongation.

In 201f, the time expand of MRT, can, with reference to described in the 201b of Fig. 3 B, make the expiration time of the configurable timer started after MRT expires be later than the congestion control end time.

It should be noted that in the embodiment of Fig. 3 F, do not limit the execution order of the prolongation operation of PTAUT and the prolongation operation of MRT.The embodiment of the present invention can extend MRT after prolongation PTAUT, can extend PTAUT, also can make the prolongation operation part of the prolongation of PTAUT operation and MRT or perform fully simultaneously after prolongation MRT.These changes all fall in the scope of the embodiment of the present invention.

The time value of MRT is longer than the time value of PTAUT, the embodiment of the present invention is when network occurs congested, the PTAUT timer of synchronous lengthening end and the MRT timer at core net place, MRT after prolongation is still longer than the PTAUT after prolongation, to ensure to cause core network entity to think by mistake in terminal out of reach because of the refusal of access network entity, thus can call terminal be continued, improve system effectiveness.

In the embodiment of the present invention, can represent " prolongation " of timer and increase time value on the timer, or represent the time value of replacing original timer by longer time value.

Such as, PTAUT increases very first time value T1 (PTAUT+T1), MRT increases the second time value T2 (MRT+T2).T1 and T2 can be equal, also can be different, only need ensure that the MRT after extending is longer than PTAUT.Preferably, T2 >=T1.

Alternatively, the T3 (such as, T3=PTAUT+T1) longer than PTAUT can be used to replace PTAUT, use the T4 (such as, T4=MRT+T2) longer than MRT to replace MRT.Equally, T1 and T2 here can be equal, also can be different, only need ensure T4 > T3.Preferably, T2 >=T1.

Preferably, the PTAUT after extending is made to be more than or equal to the stand-by period wait time (such as, T3 or PTAUT+T1 >=wait time) that Access Network distributes to terminal.

Below for T1=T2, in further detail the embodiment of the present invention is described.But the embodiment of the present invention is not limited to concrete example described below, can change in the scope of the embodiment of the present invention.

Fig. 4 is the schematic flow diagram of network congestion processing procedure according to an embodiment of the invention.The process of Fig. 4 is for SAE/LTE system, and relate to three entities, wherein UE GC group connector, eNB represents access network equipment, and MME represents equipment of the core network.Such as, but the embodiment of the present invention is not limited to the concrete standard/system/entity representated by these titles, and can change according to different application scene, and access network equipment can be RNC (radio network controller; Radio Network Controller), equipment of the core network also can be SGSN etc.These changes all fall in the scope of the embodiment of the present invention.

401, when core net (such as MME place) occurs congested, MME will send congestion control to eNB and start message OVERLOAD START request eNB execution congestion control.MME can define behavior action (access request for which UE performs refusal) and a time value T within the message.

402, MME, for the MRT of UE increasing this time value T (MRT '=MRT+T), makes the expiration time of the configurable timer started after the MRT increasing this time value expires be later than the congestion control end time.When selection operation UE colony, the MRT for this colony is made to increase time value T.Although to it should be noted that in Fig. 4 that 402 are shown as after 401, the embodiment of the present invention is not limited thereto, and 402 can perform before 401, also can perform with 401 simultaneously.

403, eNB, after receiving OVERLOAD START message, can perform corresponding RRC and connect refusal (RRC CONNECTION REJECT message) to control the access of user from Access Network side, distribute stand-by period wait time to user.Can to UE passing time value T in this RRC connection refused message.

Alternatively, by other two kinds of modes (the proprietary signaling of message 2 or message 3 broadcast), time value T can be passed to corresponding UE at 404, eNB.The transmission of time value T can be passing time value T itself, also can the only index of passing time value T or other indicating modes.

After 405, UE receives time value T, the period position oneself can preserved upgrades timer PTAUT increases time value T (PTAUT '=PTAUT+T).When eNB selection is with broadcast passing time value T, can define which UE in broadcast can increase time value T.ENB determines that the method for which UE can refer to the embodiment of Fig. 2 A-2E.

Because eNB will to be longer than other UE to the back off time of low priority UE, so the period position that MME and eNB also can only allow low priority UE increase oneself upgrades timer value.In addition, be give a time variable increased in Fig. 4, the embodiment of the present invention also can be transmitted a new time value and be used for replacing existing period position and upgrade timer and MRT timer.

The embodiment of the present invention also can be applied to the first congested situation of Access Network, and namely eNB place is congested and MME is in normal condition.Fig. 5 is the schematic flow diagram of network congestion processing procedure according to another embodiment of the present invention.

501, when Access Network (such as eNB place) occurs congested, by the access control in RRC connection refused message (RRC CONNECTION REJECT) or system broadcast message, eNB can forbid that certain writes the access of UE, in above-mentioned two kinds of message, define a stand-by period wait time, waiting time is used for forbidding initiating network insertion in UE is between this.ENB can also define a time value T, in above-mentioned RRC connection refused message.

Alternatively, additionally by other system message or specific messages, time value T can be passed to UE at 502, eNB.

According to one embodiment of present invention, using stand-by period wait time as above-mentioned time value T, also process 502 can be omitted in the case.

The PTAUT of oneself is increased this time value T by 503, UE after receiving this time value T simultaneously

(PTAUT’＝PTAUT+T)。Preferably, PTAUT '=PTAUT+T >=wait time is made, such as

Adopt stand-by period wait time as above-mentioned time value T.

On the other hand, at 504, eNB, time value T is passed through S1-AP Message Transmission to MME.This S1-AP message can be existing message, and as eNB configuration update, or definition new S1-AP message transmits this time value T.Meanwhile, eNB also can carry action to inform that the MRT of MME to which user adds Value Operations.Or when only carrying time value T, system default is for only operating low priority UE (low priority terminal).

After 505, MME receives action and/or time, optionally can add Value Operations (MRT '=MRT+T) to the MRT of some UE.Or decide the additional timer mentioned in the method for above-mentioned Fig. 3 A-3E and the time value of time expand with reference to this time value.

Therefore the embodiment of the present invention is when network occurs congested, the PTAUT timer of synchronous lengthening end and the MRT timer at core net place, to ensure to cause core network entity to think by mistake in terminal out of reach because of the refusal of access network entity, thus can call terminal be continued, improve system effectiveness.

Fig. 6 is the schematic block diagram of the network congestion treatment system according to the embodiment of the present invention.The system 600 of Fig. 6 comprises knows device 601 and control device 602.

Know that device 601 knows that the congestion control for terminal starts.Know that device 601 initiatively can know the beginning of congestion control, such as, initiate to start message overload start for the congestion control of terminal.Such as, or know that device 601 passively can know the beginning of congestion control, the congestion control received for terminal starts message overload start or other instructions.

Control device 602 is when the congestion control for terminal starts, execution segregation lag controls, described segregation lag controls for extending the lock out operation start-up time corresponding with described terminal, carries out implicit detach operation or carry out implicit detach operation to described terminal and deexcitation Idle state signaling reduction ISR operates when described lock out operation arrives start-up time to described terminal.

In an embodiment, control device 602 extends the lock out operation corresponding with this terminal and comprises start-up time: extend the checkout time value that the paging corresponding with this terminal is carried out indicating, remove the paging corresponding with this terminal to indicate when this checkout time value arrives, and start configurable timer, when configurable timer expires, implicit detach operation is carried out to described terminal or deexcitation Idle state signaling reduction ISR operates; Wherein, the prolongation value of checkout time value is equal to, or greater than the cycle of the congestion control for terminal.In the embodiment of the present invention, extend checkout time value that the paging corresponding with this terminal carry out indicating and can represent increase time value outside timer, or represent the time value of replacing original timer by longer time value.

In another embodiment, control device 602 is removed the paging corresponding with this terminal when the checkout time value that the paging that this terminal is corresponding is carried out indicating arrives and is carried out indicating but do not start configurable timer, and after scheduled duration, start configurable timer, when this configurable timer expires, implicit detach operation is carried out to described terminal or deexcitation Idle state signaling reduction ISR operates; Wherein, this checkout time value and scheduled duration sum are equal to, or greater than the cycle of the congestion control for terminal.

The network congestion treatment system of the embodiment of the present invention can concentrate in an entity, such as core network entity (as MME or SGSN), in the different entities that also can distribute on the network side, such as core network entity and access network entity (as eNB).

Fig. 7 A is the schematic block diagram of equipment of the core network according to an embodiment of the invention.The equipment of the core network 700a of Fig. 7 is an example of the network congestion treatment system of Fig. 6, comprises and knows device 701 and control device 702a.

Know that device 701 is the embodiments knowing device 601, know that the congestion control for terminal starts.

Control device 702a is an example of the control device 602 of Fig. 6.Control device 702a is before the congestion control for this terminal starts, and the movement started for terminal can reach timer MRT.

Control device 702a can stop MRT when sending and starting message for the congestion control of terminal, reopens MRT when sending the congestion control stopping message for terminal.

Alternatively, as another embodiment, control device 702a can start the long MRT of Message Time Delay and/or configurable timer sending the congestion control for terminal, makes the expiration time of configurable timer be later than the congestion control end time.

Alternatively, as another embodiment, control device 702a can when network occurs that in congested process, MRT expires, do not remove the PPF of terminal, do not open configurable timer, open an additional timer or open additional timer when sending the congestion control stopping message overload stop for terminal, remove PPF when this additional timer expires and also open configurable timer, the expiration time of configurable timer is later than the congestion control end time.

Alternatively, as another embodiment, control device 702a can when network occurs that in congested process, MRT expires, remove PPF, do not open configurable timer, stopping opening additional timer during message overload stop for the congestion control of terminal when sending, opening configurable timer when this additional timer expires.。

Alternatively, as another embodiment, control device 702a can when network occurs that in congested process, MRT expires, remove PPF and open configurable timer, additional timer is opened when this configurable timer expires, the expiration time of additional timer is later than the congestion control end time, carries out implicit detach or deexcitation ISR operates when this additional timer expires to terminal.

Therefore, the embodiment of the present invention changes the operation behavior of core network entity, ahead of time user is carried out implicit detach or deexcitation ISR operates to ensure can not to cause because of the refusal of access network entity core net, improves system effectiveness.

According to one embodiment of present invention, control device 702a can only control the MRT of low priority terminal (low priority UE).

The embodiment of the present invention also can the PTAUT of synchronous lengthening end and the MRT at equipment of the core network place.Fig. 7 B is the schematic block diagram of network congestion treatment system according to another embodiment of the present invention.In the system 700b of Fig. 7 B, know device 701 and know that device 701 is identical in Fig. 6.The control device 702b of Fig. 7 B is an example of the control device 602 of Fig. 6, comprises the first extension unit 703 and the second extension unit 704.

First extension unit 703 extends the periodical position renewing timer PTAUT of end.Second extension unit 704 extends equipment of the core network place can reach timer MRT for the movement of terminal, and the MRT after prolongation is longer than the PTAUT after prolongation.

The embodiment of the present invention is when network occurs congested, the PTAUT timer of synchronous lengthening end and the MRT timer at core net place, to ensure to cause core net ahead of time user to be carried out implicit detach because of the refusal of access network entity and deexcitation ISR operates, improve system effectiveness.

First extension unit 703 and the second extension unit 704 can operate simultaneously, also can successively operate.In addition, the first extension unit 703 and the second extension unit 704 can concentrate in a control network element, also can be distributed in different entities.

Such as, the first extension unit 703 increases very first time value T1 (PTAUT+T1) on PTAUT, and the second extension unit 704 increases the second time value T2 (MRT+T2) on MRT.T1 and T2 can be equal, also can be different, only need ensure that the MRT after extending is longer than PTAUT.Preferably, T2 >=T1.

Alternatively, the first extension unit 703 can use the T3 (such as, T3=PTAUT+T1) longer than PTAUT to replace PTAUT, and the second extension unit 704 uses the T4 (such as, T4=MRT+T2) longer than MRT to replace MRT.Equally, T1 and T2 here can be equal, also can be different, only need ensure T4 > T3.Preferably, T2 >=T1.

Preferably, the PTAUT after extending is made to be more than or equal to the stand-by period waittime (such as, T3 or PTAUT+T1 >=wait time) of Access Network distribution.

According to one embodiment of present invention, the first extension unit 703 and the second extension unit 704 can only operate low priority terminal (low priority UE).

Control device 720b according to the embodiment of the present invention realizes by equipment of the core network or access network equipment.Fig. 8 is the schematic block diagram of the equipment of the core network according to the embodiment of the present invention.The equipment of the core network 800 of Fig. 8 is an example of the control device 702b of Fig. 7 B, comprises the first extension unit 801 and the second extension unit 802.

The equipment of the core network 800 of Fig. 8 can perform in Fig. 4 the operation relating to core network entity (such as MME), particularly, second extension unit 802 is increasing by a time value on the MRT of terminal, makes the expiration time of the configurable timer started after the MRT increasing this time value expires be later than the congestion control end time.First extension unit 801 transmits this time value by Access Network to terminal, increases this time value to make terminal on PTAUT.

Fig. 9 is the schematic block diagram of the access network equipment according to the embodiment of the present invention.The access network equipment 900 of Fig. 9 is an example of the control device 702b of Fig. 7 B, comprises the first extension unit 901 and the second extension unit 902.

The access network equipment 900 of Fig. 9 can perform in Fig. 5 the operation relating to access network entity (such as eNB), and particularly, the first extension unit 901, for transmitting a time value to terminal, increases this time value to make terminal on PTAUT.Second extension unit 902, for transmitting this time value to equipment of the core network, is increasing this time value to make equipment of the core network on the MRT of terminal.Preferably, this time value can be the stand-by period of Access Network to terminal distribution.

Those of ordinary skill in the art can recognize, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.

Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the system of foregoing description, device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.

In several embodiments that the application provides, should be understood that disclosed system, apparatus and method can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.

The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.

If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a 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 aforesaid storage medium comprises: 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. various can be program code stored medium.

The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.

Claims

1. a network congestion processing method, is characterized in that, comprising:

When the congestion control for terminal starts, execution segregation lag controls, described segregation lag controls for extending the lock out operation start-up time corresponding with described terminal, when described lock out operation arrives start-up time, implicit detach operation is carried out to described terminal or implicit detach operation is carried out to described terminal and deexcitation Idle state signaling reduction ISR operates

2. the method for claim 1, is characterized in that, before the congestion control for this terminal starts, also comprises: the movement started for terminal can reach timer MRT;

Described execution segregation lag controls to comprise:

Stopping MRT when sending and starting message for the congestion control of terminal, reopening MRT when sending the congestion control stopping message for terminal, or,

Start the long MRT of Message Time Delay and/or the configurable timer for described terminal for the congestion control of terminal sending, make the expiration time of configurable timer be later than the congestion control end time, or,

When network occurs that in congested process, MRT expires, mark P PF is carried out in the paging of not removing described terminal, do not open configurable timer, open additional timer or open additional timer when sending the congestion control stopping message for terminal, remove PPF when described additional timer expires and open configurable timer, the expiration time of configurable timer is later than the congestion control end time, or

When network occurs that in congested process, MRT expires, remove PPF, do not open configurable timer, stopping opening additional timer during message for the congestion control of terminal when sending, opening described configurable timer when described additional timer expires, or

When network occurs that in congested process, MRT expires, remove PPF and open configurable timer, additional timer is opened when described configurable timer expires, the expiration time of additional timer is later than the congestion control end time, carries out implicit detach operation or deexcitation ISR operates when described additional timer expires to terminal.

3. method as claimed in claim 2, is characterized in that, performs segregation lag control to comprise based on described MRT:

Extend the periodical position renewing timer PTAUT of end, and extend equipment of the core network place and can reach timer MRT for the movement of described terminal, the MRT after prolongation is longer than the PTAUT after prolongation.

4. method as claimed in claim 3, is characterized in that,

The periodical position renewing timer PTAUT extending end comprises: on described PTAUT, increase very first time value;

Extend equipment of the core network place can reach timer MRT for the movement of described terminal and comprise: on described MRT, increase by the second time value.

5. method as claimed in claim 4, it is characterized in that, described second time value is more than or equal to described very first time value.

6. method as claimed in claim 3, is characterized in that,

The periodical position renewing timer PTAUT extending end comprises: use three time value longer than described PTAUT to replace described PTAUT,

Extend equipment of the core network place can reach timer MRT for the movement of described terminal and comprise: use four time value longer than described MRT to replace described MRT.

7. method as claimed in claim 3, is characterized in that, the periodical position renewing timer PTAUT extending end comprises:

Extend described PTAUT, make the PTAUT after extending be more than or equal to the stand-by period of Access Network distribution.

8. method as claimed in claim 3, is characterized in that, extends the periodical position renewing timer PTAUT of end, and extends equipment of the core network place and can reach timer MRT for the movement of described terminal and comprise:

When core net occurs congested, described MRT increases a time value, make the expiration time of the configurable timer started after the MRT increasing this time value expires be later than the congestion control end time;

Transmit described time value by Access Network to described terminal, on described PTAUT, increase described time value to make described terminal.

9. method as claimed in claim 8, is characterized in that, transmit described time value comprise by Access Network to described terminal:

Start in message, to carry described time value at the congestion control sent to access network equipment;

Access network equipment is made to carry described time value in the radio resource control RRC connection refused message sent to described terminal, proprietary signaling or broadcast.

10. method as claimed in claim 3, is characterized in that, extends the periodical position renewing timer PTAUT of end, and extends equipment of the core network place and can reach timer MRT for the movement of described terminal and comprise:

When Access Network occurs congested, transmit a time value to described terminal, on described PTAUT, increase described time value to make described terminal;

Transmit described time value to described equipment of the core network, on described MRT, increase described time value to make described equipment of the core network.

11. methods as claimed in claim 10, it is characterized in that, described time value is more than or equal to the stand-by period of Access Network to terminal distribution.

12. methods as claimed in claim 10, is characterized in that, transmit a time value and comprise: in radio resource control RRC connection refused message or broadcast, carry described time value to described terminal.

13. methods as claimed in claim 10, is characterized in that, transmit described time value comprise to described equipment of the core network:

Described time value is carried in configuration update message or specific messages.

14. methods as claimed in claim 10, is characterized in that, also comprise: transmit action parameter, to specify described terminal to described equipment of the core network to described equipment of the core network.

15. methods as described in any one of claim 1-14, it is characterized in that, described terminal is low priority terminal.

16. 1 kinds of network congestion treatment systems, is characterized in that, comprising:

Know device, for knowing that the congestion control for terminal starts;

Control device, when the congestion control for terminal starts, execution segregation lag controls, described segregation lag controls for extending the lock out operation start-up time corresponding with described terminal, when described lock out operation arrives start-up time, implicit detach operation is carried out to described terminal or implicit detach operation is carried out to described terminal and deexcitation Idle state signaling reduction ISR operates

17. systems as claimed in claim 16, is characterized in that, described control device is also for before starting at the congestion control for this terminal, and the movement started for terminal can reach timer MRT,

Described control device is further used for stopping MRT when sending and starting message for the congestion control of terminal, reopens MRT when sending the congestion control stopping message for terminal, or,

Described control device is further used for starting the long MRT of Message Time Delay and/or the configurable timer for described terminal for the congestion control of terminal sending, and makes the expiration time of configurable timer be later than the congestion control end time, or,

Described control device is further used for when network occurs that in congested process, MRT expires, mark P PF is carried out in the paging of not removing described terminal, do not open configurable timer, open additional timer or open additional timer when sending the congestion control stopping message for terminal, remove PPF when described additional timer expires and open configurable timer, the expiration time of configurable timer is later than the congestion control end time, or

Described control device is further used for when network occurs that in congested process, MRT expires, removing PPF, do not open configurable timer, stopping opening additional timer during message for the congestion control of terminal when sending, described configurable timer is opened when described additional timer expires, or

Described control device is further used for when network occurs that in congested process, MRT expires, remove PPF and open configurable timer, additional timer is opened when described configurable timer expires, the expiration time of additional timer is later than the congestion control end time, carries out implicit detach or deexcitation ISR operates when described additional timer expires to terminal.

18. systems as claimed in claim 16, it is characterized in that, described control device comprises:

First extension unit, for extending the periodical position renewing timer PTAUT of end;

Second extension unit, can reach timer MRT for extending equipment of the core network place for the movement of described terminal, the MRT after prolongation is longer than the PTAUT after prolongation.

19. systems as claimed in claim 18, is characterized in that,

Described first extension unit increases very first time value on described PTAUT,

Described second extension unit increases by the second time value on described MRT.

20. systems as claimed in claim 18, is characterized in that,

Described first extension unit uses three time value longer than described PTAUT to replace described PTAUT,

Described second extension unit uses four time value longer than described MRT to replace described MRT.

21. systems as claimed in claim 18, it is characterized in that, described control device is equipment of the core network, when core net occurs congested,

Described second extension unit, for increasing by a time value on the MRT of terminal, makes the expiration time of the configurable timer started after the MRT increasing this time value expires be later than the congestion control end time;

Described first extension unit is used for transmitting described time value by Access Network to described terminal, increases described time value to make described terminal on PTAUT.

22. systems as claimed in claim 18, it is characterized in that, described control device is access network equipment, when Access Network occurs congested,

Described first extension unit is used for transmitting a time value to terminal, and to make described terminal increase described time value on PTAUT, described time value is more than or equal to the stand-by period of Access Network to described terminal distribution;

Described second extension unit is used for transmitting described time value to equipment of the core network, increases described time value to make described equipment of the core network on the MRT for described terminal.