CN101039506A - Method for transferring mobile management entity/user interface entity - Google Patents
Method for transferring mobile management entity/user interface entity Download PDFInfo
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- CN101039506A CN101039506A CNA2006100598383A CN200610059838A CN101039506A CN 101039506 A CN101039506 A CN 101039506A CN A2006100598383 A CNA2006100598383 A CN A2006100598383A CN 200610059838 A CN200610059838 A CN 200610059838A CN 101039506 A CN101039506 A CN 101039506A
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- H04W36/12—Reselecting a serving backbone network switching or routing node
Abstract
The present invention discloses a MME/UPE transfer method, applied to evolution networks, including: judging whether the current status of the source MME/UPE providing services for the UE before the transfer, satisfies the preset transfer conditions or not; selecting an object MME/UPE after the transfer when the transfer conditions are satisfied; establishing connections between the object MME/UPE and the current owned LTE-RAN entities of the transfered UE; executing the migration processes from the source MME/UPE to the object MME/UPE; establishing the connection in the order of the transfered UE, the said LTE-RAN entities, the said object MME/UPE and the IAS anchor points; releasing the connection between the source MME/UPE and the source services LTE-RAN entities of the UE before the transfer. Application of the present invention, can execute the services MME/UPE transfer to the presidial UE, because a MME/UPE load is heavier or the link has failures or other reasons, thus achieving the load balance of every MME/UPE to ensure the uninterrupted communications.
Description
Technical field
The present invention relates to evolvement network, relate in particular to mobile management entity in the evolvement network (MobilityManagement Entity, MME)/user entity (User Plane Entity, a kind of moving method UPE).
Background technology
(Universal Mobile Telecommunications System is the 3-G (Generation Three mobile communication system) that adopts the WCDMA air interface technologies UMTS) to universal mobile telecommunications system, also the UMTS system is called the WCDMA communication system usually.The UMTS system has adopted and the similar structure of second generation mobile communication system, comprise Radio Access Network (Radio Access Network, RAN) and core network (CoreNetwork, CN).Wherein Radio Access Network is used to handle all and wireless function associated, and CN handles that all voice calls are connected with data in the UMTS system, and the exchange of realization and external network and routing function.CN from be divided in logic circuit commutative field (Circuit Switched Domain, CS) and packet-switched domain (Packet Switched Domain, PS).(User Equipment UE) has constituted whole UMTS system together for UTRAN, CN and subscriber equipment.Its system configuration as shown in Figure 1.
UTRAN is a land radio access web, it comprise one or several RNS (RadioNetwork Subsystem, RNS).(Radio NetworkController RNC) forms with one or more base stations (NodeB) RNS by a radio network controller.Interface between RNC and the CN is the Iu interface, and NodeB is connected by Iub interface with RNC.In UTRAN inside, interconnected by the Iur interface between the radio network controller, the Iur interface can connect or connect by transmission network by the direct physical between the RNC.RNC is used for distributing and is attached thereto with control or the Radio Resource of relevant NodeB.NodeB then finishes the conversion of the data flow between Iub interface and the Uu interface, also participates in a part of RRM simultaneously.The structure of UTRAN as shown in Figure 2.
The core network architecture in 3G PS territory mainly comprises network element as shown in Figure 3: Serving GPRS Support Node (Serving GPRS Support Node, SGSN) and Gateway GPRS Support Node (Gateway GPRSSupport Node, GGSN).
Wherein, SGSN is a basic composition network element of PS network.Its significant feature is exactly the IP grouping of transmitting I/O for the UE of this SGSN coverage, and its status is similar to the VMSC (Visited Mobile Switching Center) in the CS territory.In addition, also integrated (the Visitor Location Register of Visited Location Registor in the CS network that is similar among the SGSN, VLR) function, when adhering to (Attached) state when the user is in, stored among the SGSN with grouping relevant user profile and positional information, similar with VLR, (HomeLocation Register obtains in HLR) the most of user profile among the SGSN from attaching position register in position updating process.
GGSN also is one the Network Element Function entity of introducing in order to provide the PS business function in the UMTS network, and route and the encapsulation of packet between PS net and external data network is provided.
At present in 3GPP, each manufacturer's active research Long Term Evolution (Long Term Evolution, LTE), the purpose of LTE provides a kind of network that can reduce time delay, raising user data rate, improve power system capacity and low-cost covering, only use PS territory business, bearer network all is the IP carrying.
A kind of typical two-layer node evolution network framework comprises as shown in Figure 4:
LTE RAN: be the wireless access network of evolvement network, node wherein has evolution base station eNodeB, has chain of command server (Control Plane Server, CPS) etc., concrete node number is indefinite, logically it is referred to as Long Term Evolution radio access network entity (LTE-RAN Entity).
MME/UPE: be logic entity, the function of MME is to preserve mobile management (Mobility Management, MM) context of subscriber equipment (UE), sign as the user, mobility status, tracking area (Tracking Area, TA) information etc., and the user authenticated; The function of UPE is the entity of the UE termination downlink data of idle (idle) state, triggers paging simultaneously, preserves the context of UE, as the IP address of UE and routing iinformation etc.
The anchor point of user's face (User Plane Anchor): be associated with UPE, keep the anchor point of user's face constant in during user's session.
(Home Subscriber Server, HSS): the HLR of evolution is associated storage and renewal user's log-on message to home subscriber servers with MME.
In evolvement network, MME/UPE and LTE-RAN Entity have many-to-many relationship, i.e. S1-flex.S1 is the interface of evolvement network RAN and evolution block core (Evolved Packet Core).As shown in Figure 5.
In evolvement network, MME and UPE not necessarily are positioned at same physical node, and also unqualified is core net (CN) node.For example: might be in EnodeB by UPE, MME is in CN as the chain of command node.
In existing standard, the MME/UPE switching (under the situation that MME/UPE separates, the switching between the UPE and between the MME may occur) that is under the enable mode at UE between the inner MME/UPE of evolvement network is divided into two kinds of situations:
Situation one: UE moves out its current affiliated MME/UPE certain distance, and current communication is non-delay sensitive business.
Under top situation one condition, when UE crosses over MME/UPE service area border, switching between MME/UPE has just been carried out, and selects a new MME/UPE to serve in the service area of new MME/UPE, carries out the MME/UPE gravity treatment when being in idle pulley just as UE.Its MME/UPE switches schematic diagram as shown in Figure 6, user terminal UE1 moves to the MME/UPE service area 2 from MME/UPE service area 1, serving MME/UPE before moving is the MME/UPE1 in the service area 1, and the serving MME/UPE after moving is the MME/UPE3 in the service area 2.
Situation two: UE is carrying out the delay sensitive business.
Under top situation two conditions, when UE crosses over a MME/UPE service area border, MME/UPE originally can not change (because the notion of S1-flex is arranged, promptly LTE-RAN Entity is that multi-to-multi is connected with MME/UPE), switches between LTE-RAN Entity and carries out.Have only when UE enters into the LTE_IDLE state, UE just selects a MME/UPE to re-register in new MME/UPE service area.Because for delay sensitive business (as the VoIP business), this processing mode is proper, can might not make the user feel jitter because of gravity treatment MME/UPE.Its MME/UPE switches schematic diagram as shown in Figure 7, and user terminal UE1 moves to the MME/UPE service area 2 from MME/UPE service area 1, and the serving MME/UPE before moving is the MME/UPE1 in the service area 1; After the user moved to MME/UPE service area 2, its serving MME/UPE did not change, and still was MME/UPE1; Only after the user is in idle pulley, just in MME/UPE service area 2, select MME/UPE3 as its serving MME/UPE.
In above-mentioned situation two, could change MME/UPE because only enter under idle pulley (LTE_IDLE) state at UE, but in some cases, as Operation and Maintenance (O﹠amp; M) reason, MME/UPE load are too heavy, the perhaps too far away or other reasons that moves to the link congestion between the LTE-RAN Entity or UE of MME/UPE, may not cause communication disruption if do not change MME/UPE, its influence is far longer than the of short duration variation of signal quality that produces because of gravity treatment MME/UPE.
With Fig. 7 is example, when the MME/UPE1 load in the MME/UPE service area 1 is too heavy, in service area 1, when new UE asks to insert again, may not can be linked among the MME/UPE1, and can select the MME/UPE2 in the service area 1 to insert according to the load balancing principle.Yet if the duty ratio of current MME/UPE1 less (Xia Mian UE is a lot of in fact, but a lot of UE does not register or is in the idle state), it is many that MME/UPE2 activates the UE of (Active) down, so load is bigger; Like this, the new UE that initiates the request that inserts will select the MME/UPE1 registration, user under the MME/UPE1 is just more, when after a lot of users under the MME/UPE1 when transferring state of activation to, each user will select MME/UPE1 as serving MME/UPE, the load of MME/UPE1 will be very big, causes taking place congested.If what the user used is the delay sensitive business, then according to above-mentioned situation two, in this conversation procedure, do not carry out MME/UPE in the existing scheme and switch, when congested generation, will inevitably produce communication disruption.Therefore, need a kind of congestion control mechanism and realize load balance between each MME/UPE.
Summary of the invention
The invention provides a kind of MME/UPE moving method, can not carry out the problem that load balance causes communication disruption according to the current state of MME/UPE in order to solve in the prior art.
The inventive method comprises:
Whether the current state of the source MME/UPE that serves for user equipment (UE) before A, the judgement migration satisfies the transition condition of presetting; When transition condition satisfies, select the target MME/UPE after the migration;
B, described target MME/UPE connect with the current affiliated Long Term Evolution wireless access network LTE-RAN entity of quilt migration UE;
C, the described source MME/UPE of execution are to the migration flow process of described target MME/UPE;
D, described target MME/UPE upgrade with connecting system between being connected of anchor point IAS anchor point; Set up being linked in sequence by migration UE, described LTE-RAN entity, described target MME/UPE and IAS anchor point.
According to said method of the present invention, also comprise the following steps:
E, moved UE, discharged being connected between the source service LTE-RAN entity of this UE before described source MME/UPE and the migration at this.
Whether the current state of judging the source MME/UPE that serves for user equipment (UE) before moving described in the steps A satisfies default transition condition, comprising:
Whether the current state of being judged self by described source MME/UPE satisfies default transition condition; Perhaps
Judge by service LTE-RAN entity under current by migration UE whether the current state of source serving MME/UPE satisfies default transition condition.
Whether the described current state of judging source MME/UPE satisfies default transition condition, includes but not limited to:
Whether the present load of judging source MME/UPE surpasses threshold value in advance; Perhaps
Judge whether long, the congested or disconnection of link between the current affiliated service LTE-RAN entity of source MME/UPE and UE.
According to said method of the present invention, in the described steps A, when described source MME/UPE judges that the current state of self satisfies default transition condition, selects the target MME/UPE after the migration, and send migration request to this target MME/UPE and notify;
Among the described step B, after described target MME/UPE received migration request notice, Resources allocation was also set up and described being connected by the current affiliated LTE-RAN entity of migration UE.
According to said method of the present invention, in the described steps A, when described source MME/UPE judges that the current state of self satisfies default transition condition, select the target MME/UPE after the migration, and, in this migration request notice, carry the target MME/UPE address information of selection to being sent the migration request notice by the current affiliated LTE-RAN entity of migration UE;
Among the described step B, after move the LTE-RAN entity of UE under current and receiving the migration request notice, set up and being connected of described target MME/UPE according to the target MME/UPE address information of acquisition.
According to said method of the present invention, in the described steps A, when service LTE-RAN entity judges that the current state of source MME/UPE satisfies default transition condition under current by migration UE, select the target MME/UPE after the migration also to connect with it.
Describedly included but not limited to by migration UE: and the long UE of communication link between the MME/UPE of source; The perhaps lower UE of rank; Perhaps ask the UE of non-delay sensitive business; The perhaps big UE of traffic carrying capacity.
According to said method of the present invention, the target MME/UPE after migration of described selection, concrete grammar includes but not limited to:
According to by the shortest MME/UPE of choice of location link of migration UE as described target MME/UPE; And/or
Load size according to each MME/UPE in the network selects the MME/UPE of load minimum as described target MME/UPE.
According to said method of the present invention, after MME/UPE receives that request is set up in the new connection of initiating of the UE that is administered, judge whether the current state of self satisfies default transition condition; If transition condition satisfies, then select a target MME/UPE, carry out described step B-D, the UE of this new initiation connection request directly is registered on the selected target MME/UPE.
According to said method of the present invention, described source MME/UPE belongs to same service area or belongs to different service areas with described target MME/UPE.
It is same LTE-RAN entity that the LTE-RAN entity is served in described source of being moved current affiliated service LTE-RAN entity of UE and preceding this UE of migration, or is different LTE-RAN entities.
Described MME and UPE are logical functional entity, belong to same physical node in the evolvement network, or belong to different physical nodes.
When the upper level node of evolvement network had only IAD ACGW node, described ACGW was service ACGW and anchor point ACGW;
Described source MME/UPE is the preceding service ACGW of migration;
Described target MME/UPE is the service ACGW after moving;
Anchor point ACGW does not change before and after migration.
Beneficial effect of the present invention is as follows:
(1) adopts the present invention, when some abnormal conditions occurring, as O﹠amp; The M reason, certain MME/UPE load is heavier or during reason such as link failure, can carry out the migration of serving MME/UPE to the UE that is administered, and realizes each MME/UPE load balancing, guarantees that communication do not interrupt.
(2) the present invention can be to being selected the UE long as communication link between selection and the source MME/UPE by migration UE; The perhaps lower UE of rank; Perhaps ask the UE of non-delay sensitive business etc., realizing load balancing, guaranteeing to avoid because the migration of MME/UPE has influence to higher-level user and important service under the unbroken prerequisite of communication as far as possible.
(3) adopt the present invention, after MME/UPE receives that request is set up in the new connection of initiating of the UE that is administered, if self load is heavier, then select a target MME/UPE, the UE of this new initiation connection request directly is registered on the selected target MME/UPE, realize access control, further effectively avoid transshipping phenomenon.
Description of drawings
Fig. 1 is a UMTS system configuration schematic diagram;
Fig. 2 is the UTRAN schematic network structure;
Fig. 3 is a PS territory schematic network structure;
A kind of evolution network structure schematic diagram of Fig. 4 for providing in the prior art;
Fig. 5 shares the S1-flex configuration schematic diagram for evolvement network;
Fig. 6 is the MME/UPE handoff procedure schematic diagram of UE under non-delay sensitive business in the prior art;
Fig. 7 is the MME/UPE handoff procedure schematic diagram of UE under the delay sensitive business in the prior art;
Fig. 8 is one of MME/UPE migration flow chart of the present invention;
Fig. 9 is two of MME/UPE migration flow chart of the present invention;
Figure 10 is three of MME/UPE migration flow chart of the present invention;
Figure 11 is MME/UPE migration and the immovable transition process schematic diagram of service LTE-RAN Entity;
Figure 12 is the transition process schematic diagram of MME/UPE migration and service LTE-RAN Entity change;
Figure 13 is illustrated in one of MME/UPE transition process schematic diagram in the same MME/UPE service area;
Figure 14 is illustrated in two of the interior MME/UPE transition process schematic diagram of same MME/UPE service area;
Figure 15 is service ACGW transition process schematic diagram.
Embodiment
The invention provides a kind of MME/UPE moving method, comprising: whether the current state of judging the source MME/UPE that serves for user equipment (UE) before moving satisfies default transition condition; When transition condition satisfies, determine a target MME/UPE after the migration; Serving MME/UPE of UE is moved to target MME/UPE (in the following description, foundation or release MME/UPE are connected with LTE-RAN Entity and other network entity, all at single UE).
Below in conjunction with accompanying drawing, the inventive method is described in detail.
Referring to Fig. 8, be one of MME/UPE moving method flow chart of the present invention, comprise following concrete steps:
Step 2, source MME/UPE send the migration request notice to target MME/UPE, wherein comprise some necessary context (context) information, sign as UE, mobile management context (MM context) is as the position of UE, the service quality (Qos) of data pack protocol context (PDP context) information such as UE communication, anchor point (Anchor) address of UE communication etc.;
Step 3, target MME/UPE receive that migration request notice back distributes necessary resource, communicate with the LTE-RAN Entity of UE current service, set up target MME/UPE and be connected (being connected of user's face and signaling plane) of serving LTE-RANEntity;
Step 4, execution source MME/UPE arrive the transition process of target MME/UPE, can take harmless or seamless migration; Concrete transition process is a prior art, does not describe in detail at this;
Step 5, set up UE to service LTE-RAN Entity being linked in sequence to target MME/UPE;
Step 6, target MME/UPE are updated to the connection (if a plurality of IAS Anchor are arranged, need send update request to each IAS Anchor) of described point between connecting system (Inter Access SystemAnchor, IAS Anchor);
Step 7, set up being linked in sequence between UE, service LTE-RAN Entity, target MME/UPE and the IAS Anchor;
The connection that step 8, source of release MME/UPE serve LTE-RAN Entity to the source of the preceding UE of migration.
In the above-mentioned flow process, step 5 and step 6 sequencing can change.
In the described flow process of Fig. 8, the MME/UPE transition process is to be initiated by source MME/UPE, and notification target MME/UPE is initiated resource allocation and is connected foundation to service LTE-RAN Entity by target MME/UPE.
In the concrete method carried out therewith, can also initiate migration by source MME/UPE, notification service LTE-RANEntity, the address information etc. of carrying the target MME/UPE of selection in notice (or does not send target MME/UPE address information, oneself come select target MME/UPE by LTE-RAN Enetiy) issue service LTE-RAN Entity, be connected to the target MME/UPE of selection by service LTE-RAN Entity.
Concrete implementation step comprises as shown in Figure 9:
Step 2, source MME/UPE send the service LTE-RAN Entity of announcing removal to UE, carry the address information etc. of the target MME/UPE of selection and issue service LTE-RAN Entity in notice;
Step 3, service LTE-RAN Entity and target MME/UPE connect (chain of command and user's face) and Resources allocation;
The migration that step 4, execution source MME/UPE arrive target MME/UPE can be taked harmless or seamless migration; Concrete transition process is a prior art, does not describe in detail at this;
Step 5, set up the connection of UE to service LTE-RAN Entity to target MME/UPE;
Step 6, target MME/UPE are updated to the connection (if a plurality of IASAnchor are arranged, need send update request to each IAS Anchor) of IAS Anchor;
Step 7, set up being linked in sequence between UE, service LTE-RAN Entity, target MME/UPE and the IAS Anchor;
The connection that step 8, source of release MME/UPE serve LTE-RAN Entity to the source of the preceding UE of migration.
In the concrete method carried out therewith, can also initiate migration by service LTE-RAN Entity and (initiatively understand source MME/UPE loading condition or link condition as service LTE-RAN Entity, perhaps source MME/UPE is notified to service LTE-RAN Entity with its present load situation or link condition), service LTE-RAN Entity is according to source MME/UPE loading condition or link condition, and the MME/UPE migration is initiated in decision.
Concrete implementation step comprises as shown in figure 10:
Step 2-7: corresponding respectively with the step 3-8 in Fig. 9 flow process, do not describe in detail.
According to MME/UPE moving method provided by the invention, move that UE can select and source MME/UPE between the UE that grows of communication link; The perhaps lower UE of rank; Perhaps ask the UE of non-delay sensitive business; Perhaps UE that traffic carrying capacity is big etc.
In addition, the present invention can also insert the UE that asks to new initiation and carry out access control, and after MME/UPE received that request is set up in the new connection of initiating of the UE that is administered, elder generation judged whether the current state of self satisfies default transition condition; If transition condition satisfies, then select a target MME/UPE, the UE of this new initiation connection request directly is registered on the selected target MME/UPE.
Illustrate various MME/UPE migration situation below.
Embodiment 1:
Referring to Figure 11, be MME/UPE migration and the immovable transition process schematic diagram of service LTE-RAN Entity.
Among Figure 11, user equipment (UE) 1 moves to MME/UPE service area 2 from MME/UPE service area 1, and when UE moves to following time of LTE-RAN Entity5 of service area 2, its serving MME/UPE still is the MME/UPE1 before moving; If this moment is because O﹠amp; Heavier or the MME/UPE1 of M reason or MME/UPE1 load takes place congested or other reasons (by the decision of RRM (RRM) strategy) to the link of LTE-RAN Entity5, according to said method of the present invention, serving MME/UPE of UE1 can be moved to MME/UPE2 or MME/UPE3 or MME/UPE4 from MME/UPE1; Concrete target MME/UPE after which selects as migration can determine according to reasons such as the position of UE and loads.For example, if according to the position of UE, preferably MME/UPE3 or MME/UPE4 are because these two MME/UPE are positioned at the service area of the current position of UE.If select according to load, can select the less MME/UPE of load as target MME/UPE, not exclusively get rid of the situation of selecting MME/UPE2, if MME/UPE1,3,4 load are very heavy, may take all factors into consideration so and select to move to MME/UPE2.Serving MME/the UPE that drawn among Figure 11 is moved to the situation of MME/UPE3, with migration back communication link, sees among Figure 11 shown in the heavy line before the UE migration.
Embodiment 2:
Referring to Figure 12, be the transition process schematic diagram that moves for MME/UPE and service LTE-RAN Entity changes simultaneously.
Among Figure 12, UE still is connected on the MME/UPE1 after moving to LTE-RAN Entity4, switch but trigger under the scope that moves to LTE-RAN Entity5, UE switches under the LTE-RAN Entity5, simultaneously, according to reasons such as loads, serving MME/UPE moves, and is moved on the MME/UPE2,3,4 by source MME/UPE1, and Figure 12 serving MME/UPE that drawn is moved to the situation of MME/UPE3, with migration back communication link, see among Figure 12 shown in the heavy line before the UE migration.
Embodiment 3:
At same service area, MME/UPE shares with resource pool, and in general, UE moves under other MME/UPE scope same resource pool under, can not initiate the MME/UPE migration, can save signaling like this, the minimizing service disconnection.But at some in particular cases, also need in same resource pool, carry out the migration of serving MME/UPE.For example: special circumstances have:
1, when needs carried out Operation and Maintenance to system, for example system upgraded or overhauls, and current serving MME/UPE can not be used in a period of time.
2, current service MME/UPE overload, for example: the most of user under the MME/UPE administration transfers state of activation to by idle condition at short notice, makes the load of this MME/UPE surpass its load that can bear.
3, link congestion between serving MME/UPE and the LTE-RAN Entity or disconnection etc.
When special circumstances take place, can be in same resource pool select target MME/UPE, carry out serving MME/UPE migration.
Figure 13 is illustrated in the same MME/UPE service area, the current service LTE-RAN Entity of UE1 does not change, the migration before and the migration after service LTE-RAN Entity all be LTE-RAN Entity3, and serving MME/UPE is moved to the situation of MME/UPE2 by MME/UPE1, with migration back communication link, see among Figure 13 shown in the heavy line before the UE migration.
Figure 14 is illustrated in the same MME/UPE service area, the current service LTE-RAN Entity of UE1 changes, service LTE-RAN Entity before the migration is LTE-RAN Entity2, service LTE-RAN Entity after the migration is LTE-RAN Entity3, and serving MME/UPE is moved to the situation of MME/UPE2 by MME/UPE1, with migration back communication link, see among Figure 14 shown in the heavy line before the UE migration.
In above description, MME/UPE is a logical functional entity, can belong to same physical node in the evolvement network, can belong to different physical nodes yet, IAS Anchore can not change in session (Session) process of UE as mobile anchor point.If the upper level node of evolvement network has only an IAD (Access GageWay, AGCW) during node, this ACGW both can be used as service (Serving) ACGW, the function that also has anchor point (Anchor) ACGW simultaneously, Serving ACGW has the function (being equivalent to logic MME/UPE) of similar SGSN of the prior art, Anchor ACGW has the function (being equivalent to logic IAS Anchor) of similar GGSN of the prior art, a UE has only a Serving ACGW at most, and a plurality of Anchor ACGW can be arranged.UE can be linked into an ACGW by LTE-RAN Entity and insert the external packet data network then (Packet Data Network, PDN), such ACGW is promptly as Serving ACGW, again as Anchor ACGW.ACGW and LTE-RAN Entity are many-to-many relationship, move to as UE under other the ACGW scope, the Serving ACGW function of UE can be transferred under the new ACGW, and keep original Anchor ACGW function still constant on the original ACGW (in the Session Time at UE, Anchor ACGW can not change all the time, and Serving ACGW can change).When the APN that session occurs (Access Point Name, Access Point Name) is on different ACGW, may a plurality of Anchor ACGW be arranged a UE.
If the evolvement network high level only has a node ACGW, MME/UPE then provided by the invention moves concrete implementation method, with following embodiment 4 explanations.
Embodiment 4:
Figure 15 is service ACGW migration transition process schematic diagram.The communication link that UE begins is to be connected to ACGW1 from LTE-RAN Entity2, and this ACGW is promptly as Serving ACGW, again as Anchor ACGW, sees among the figure shown in the bold dashed lines link; When UE moved to new LTE-RAN Entity3, Serving ACGW can upgrade also and can not upgrade according to load, link condition.When switching LTE-RAN Entity, if Serving Anchor does not change, then UE still inserts ACGW1, and its link is shown in bold dots setting-out link among Figure 15.Under the load or link reason of ACGW1, the migration of Serving ACGW also may take place, and the link after the migration is seen among Figure 15 shown in the runic solid line link, in this link, AGWG1 is as the Anchor ACGW of this UE, and ACGW2 is as the Serving ACGW of this UE.
Shown in Figure 15 is the situation that LTE-RAN Entity changes, and also possibility LTE-RAN Entity is constant, and the ACGW migration takes place.Concrete condition exemplifies no longer one by one.
The situation that also has a kind of more complicated, UE has a plurality of Anchor ACGW.In this case, during the session of UE in, these a plurality of Anchor ACGW do not change all the time.
In this embodiment 4, when the upper level node of evolvement network had only IAD ACGW node, then this ACGW was all service ACGW and anchor point ACGW; ServingACGW among the ACGW before the migration is equivalent to source MME/UPE; Serving ACGW among the ACGW after the migration is equivalent to target MME/UPE, and anchor point ACGW does not change before and after migration.
In sum, adopt the present invention, during reason such as heavier or link failure, can carry out the migration of serving MME/UPE, realize each MME/UPE load balancing in the network, guarantee that communication do not interrupt the UE that is administered when certain MME/UPE load.
The present invention is by being selected the UE long as communication link between selection and the source MME/UPE to moving UE; The perhaps lower UE of rank; Perhaps ask the UE of non-delay sensitive business etc., realizing load balancing, guaranteeing to avoid because the migration of MME/UPE has influence to higher-level user and important service under the unbroken prerequisite of communication as far as possible.
Adopt the present invention to set up the UE that asks and carry out access control, further effectively avoid transshipping phenomenon the connection of new initiation.
The present invention can realize the MME/UPE migration under the same resource pool, also can carry out the MME/UPE migration under the different resource pond; When carrying out the MME/UPE migration, the service LTE-RAN Entity of UE can change also and can not change, thereby realizes load control and load balancing flexibly.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (14)
1, a kind of mobile management entity MME/user entity UPE moving method is applied to evolvement network, it is characterized in that, comprising:
Whether the current state of the source MME/UPE that serves for user equipment (UE) before A, the judgement migration satisfies the transition condition of presetting; When transition condition satisfies, select the target MME/UPE after the migration;
B, described target MME/UPE connect with the current affiliated Long Term Evolution wireless access network LTE-RAN entity of quilt migration UE;
C, the described source MME/UPE of execution are to the migration flow process of described target MME/UPE;
D, described target MME/UPE upgrade with connecting system between being connected of anchor point IAS anchor point; Set up being linked in sequence by migration UE, described LTE-RAN entity, described target MME/UPE and IAS anchor point.
2, the method for claim 1 is characterized in that, also comprises the following steps:
E, moved UE, discharged being connected between the source service LTE-RAN entity of this UE before described source MME/UPE and the migration at this.
3, the method for claim 1 is characterized in that, judges described in the steps A whether the current state of the source MME/UPE that serves for user equipment (UE) before moving satisfies default transition condition, comprising:
Whether the current state of being judged self by described source MME/UPE satisfies default transition condition; Perhaps
Judge by service LTE-RAN entity under current by migration UE whether the current state of source serving MME/UPE satisfies default transition condition.
4, method as claimed in claim 3 is characterized in that, whether the described current state of judging source MME/UPE satisfies default transition condition, includes but not limited to:
Whether the present load of judging source MME/UPE surpasses threshold value in advance; Perhaps
Judge whether long, the congested or disconnection of link between the current affiliated service LTE-RAN entity of source MME/UPE and UE.
5, method as claimed in claim 3, it is characterized in that, in the described steps A, when described source MME/UPE judges that the current state of self satisfies default transition condition, select the target MME/UPE after the migration, and send the migration request notice to this target MME/UPE;
Among the described step B, after described target MME/UPE received migration request notice, Resources allocation was also set up and described being connected by the current affiliated LTE-RAN entity of migration UE.
6, method as claimed in claim 3, it is characterized in that, in the described steps A, when described source MME/UPE judges that the current state of self satisfies default transition condition, select the target MME/UPE after the migration, and, in this migration request notice, carry the target MME/UPE address information of selection to being sent the migration request notice by the current affiliated LTE-RAN entity of migration UE;
Among the described step B, after move the LTE-RAN entity of UE under current and receiving the migration request notice, set up and being connected of described target MME/UPE according to the target MME/UPE address information of acquisition.
7, method as claimed in claim 3, it is characterized in that, in the described steps A, when service LTE-RAN entity judges that the current state of source MME/UPE satisfies default transition condition under current by migration UE, select the target MME/UPE after the migration also to connect with it.
8, as the described method of any claim of claim 1-7, it is characterized in that, describedly included but not limited to by migration UE: and the long UE of communication link between the MME/UPE of source; Perhaps
The UE that rank is lower; Perhaps
Ask the UE of non-delay sensitive business; Perhaps
The UE that traffic carrying capacity is big.
9, method as claimed in claim 8 is characterized in that, the target MME/UPE after migration of described selection, and concrete grammar includes but not limited to:
According to by the shortest MME/UPE of choice of location link of migration UE as described target MME/UPE; And/or
Load size according to each MME/UPE in the network selects the MME/UPE of load minimum as described target MME/UPE.
10, as the described method of any claim of claim 1-7, it is characterized in that, after MME/UPE receives that request is set up in the new connection of initiating of the UE that is administered, judge whether the current state of self satisfies default transition condition; If transition condition satisfies, then select a target MME/UPE, carry out described step B-D, the UE of this new initiation connection request directly is registered on the selected target MME/UPE.
As the described method of any claim of claim 1-7, it is characterized in that 11, described source MME/UPE belongs to same service area or belongs to different service areas with described target MME/UPE.
As the described method of any claim of claim 1-7, it is characterized in that 12, it is same LTE-RAN entity that the LTE-RAN entity is served in described source of being moved current affiliated service LTE-RAN entity of UE and preceding this UE of migration, or is different LTE-RAN entities.
13, as the described method of any claim of claim 1-7, it is characterized in that described MME and UPE are logical functional entity, belong to same physical node in the evolvement network, or belong to different physical nodes.
As the described method of any claim of claim 1-7, it is characterized in that 14, when the upper level node of evolvement network had only IAD ACGW node, described ACGW was service ACGW and anchor point ACGW;
Described source MME/UPE is the preceding service ACGW of migration;
Described target MME/UPE is the service ACGW after moving;
Anchor point ACGW does not change before and after migration.
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| CN2006100598383A CN101039506B (en) | 2006-03-15 | 2006-03-15 | Method for transferring mobile management entity/user interface entity |
| PCT/CN2007/000837 WO2007107088A1 (en) | 2006-03-15 | 2007-03-15 | A handover method, arrangement and system for mobile management entity (mme)/service gateway |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006100598383A CN101039506B (en) | 2006-03-15 | 2006-03-15 | Method for transferring mobile management entity/user interface entity |
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| CN101039506A true CN101039506A (en) | 2007-09-19 |
| CN101039506B CN101039506B (en) | 2011-02-02 |
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| CN2006100598383A Expired - Fee Related CN101039506B (en) | 2006-03-15 | 2006-03-15 | Method for transferring mobile management entity/user interface entity |
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| WO (1) | WO2007107088A1 (en) |
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| WO2007107088A1 (en) | 2007-09-27 |
| CN101039506B (en) | 2011-02-02 |
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