CN102523569A - Updating method of Tracking Area list TA List and Mobility Management Entity MME - Google Patents
Updating method of Tracking Area list TA List and Mobility Management Entity MME Download PDFInfo
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- CN102523569A CN102523569A CN2011104093726A CN201110409372A CN102523569A CN 102523569 A CN102523569 A CN 102523569A CN 2011104093726 A CN2011104093726 A CN 2011104093726A CN 201110409372 A CN201110409372 A CN 201110409372A CN 102523569 A CN102523569 A CN 102523569A
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Abstract
The invention discloses an updating method of a Tracking Area list TA List and a Mobility Management Entity MME, the method comprises the steps of: distributing a TA List to User Equipment UE, wherein the TA List comprises a TA mark where the UE enters during an adhesion process and records the TA entry time of the UE; recording the entry time if determining the UE enters a new TA during the mobile management process after the adhesion procedure, judging whether the mark of the newly entered TA exists in the TA List, if so, updating the new entry time of TA, if not, updating the TA List by the following manner and distributing the TA List to the UE: adding the mark of the newly entered TA in the primarily distributed TA List, and deleting the mark of at least one TA from the primarily distributed TA List if satisfying a set condition. The method disclosed by the invention has the advantages of specifically distributing the TA List to each UE so as to effectively reduce the position updating frequency and reduce the cost of the core network nodes.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of tracking area tabulation TA List update method and MME.
Background technology
In LTE (Long Term Evolution, Long Term Evolution) network, whole network's coverage area is divided into some TA (TrackArea, tracking area).The coverage of these TA is changeable, is a notion in logic, can cover the zone of several eNB (Evolved NodeB, evolution base station), and the zone that can overlap between TA.A TA can comprise the area of wireless network coverage territory of a plurality of eNB, and the area of wireless network coverage territory of an eNB also can comprise a plurality of TA, that is, an eNB also can belong in a plurality of TA.
UE (User Equipment; Subscriber equipment) adhere to, in the process such as position renewal; MME (Mobility Management Entity; Mobility Management Entity) be responsible for UE and distribute or redistribute tracking area tabulation TA List, UE moves in this TA list scope, does not initiate position updating process (except the periodic location update).The effect of TA List is to help core net can under the network overhead that can bear, find UE rapidly.TA List has determined the size of the paging range that MME initiates.In the paging, in all eNB scopes that MME comprises, initiate paging in the TA List that distributes for UE.
The distribution of TA List, excessive or too small, all can impact network.TA List scope is too small, then causes UE to initiate the position continually and upgrades; TA List scope is excessive, then causes the eNB paging load overweight.Therefore, need optimisation strategy to control the distribution of TAList.
Prior art has proposed the dynamic generating algorithm of TA List based on TA viscosity notion, and the dynamic generating algorithm of TA List is based on the notion of " two TA viscosities ".Suppose two neighbor tracking district TA1 and TA2, TA1 is meant at certain hour that to the viscosity of TA2 in the cycle, the number of times summation of incidence relation takes place for all from TA1 to TA2.MME can carry out the number of times statistics through the relevant signaling of the state of connecting.
Particularly, MME can store the tabulation of viscosity to each TA, writes down this MME and covers the viscosity between this TA down and all TA adjacent with it.When UE moved between two TA, MME can be triggered by related news according to the definition of viscosity and upgrade the viscosity tabulation.
The dynamic generating algorithm sketch map of TA List is as shown in Figure 1:
1) UE moves to TA1 from TA List_A, can send tracing section updating TAU Request message to MME;
2) after MME receives message, can inquire about the corresponding viscosity tabulation of TA1, the number N (N=4) of the TA that comprises according to the TA List that requires in the network planning selects at that time and three maximum TA of TA1 viscosity, is respectively TA2, TA3, TA7, constitutes new TAList;
3) MME accepts to carry in the TAU accept message new TA List relevant parameter at tracing section updating and sends to UE.
According to the dynamic generating algorithm of existing TA List, a MME has 1024 TA at most, and a TA has 8 adjacent TA at most.Like this; Each MME need safeguard the viscosity tabulation of a 1024*8; In the mobility management process of UE; Such as MME intra Intra-MME Handover process, TAU process, services request Service Request process, this TA viscosity tabulation of the subsystem real-time update among the MME.
And the viscosity gauge of MME all is suitable for to all UE of this MME management, does not consider the mobility characteristics of each UE self.
Summary of the invention
The present invention provides a kind of tracking area tabulation TA List update method and MME, in order to reach balanced effectively between the frequency that upgrades in the position and paging load.
The present invention provides a kind of tracking area tabulation TA List update method, comprising:
In the attaching process of UE, be UE distribution T A List, comprise the sign of the tracking area TA that UE gets among the said TA List in attaching process, and the entry time of the TA that in attaching process, gets into of record UE;
In the mobility management process after adhering to, when confirming TA of the new entering of UE, the record entry time; The sign of judging the new TA that gets into whether in TA List, if, upgrade the entry time of the new TA of entering; If do not exist, upgrade TA List and distribute to UE: in the TA of last sub-distribution List, add the sign of the new TA that gets into, the entry time that gets into each TA according to the UE of record through following mode; Satisfy when imposing a condition the sign of at least one TA of deletion from the TA List of last sub-distribution.
The present invention also provides a kind of Mobility Management Entity MME, comprising:
The original allocation unit is used for the attaching process at UE, is UE distribution T A List, and said TA List comprises the sign of the tracking area TA that UE gets in attaching process, and the entry time of the TA that in attaching process, gets into of record UE;
Upgrade allocation units, in the mobility management process after adhering to, when confirming TA of the new entering of UE; Record entry time, the sign of judging the new TA that gets into whether in TA List, if; Upgrade the entry time of the new TA of entering; If do not exist, upgrade TA List and distribute to UE: in the TA of last sub-distribution List, add the sign of the new TA that gets into, the entry time that gets into each TA according to the UE of record through following mode; Satisfy when imposing a condition the sign of at least one TA of deletion from the TA List of last sub-distribution.
Utilize tracking area tabulation TA List update method provided by the invention and MME; Has following beneficial effect: in the use of reality; The moving area of each UE is to have certain rules governed in the overwhelming majority time; With the entry time automatic distribution T A List of information as a reference, to each UE distribution T AI List targetedly, the frequency that can dip effectively and upgrade; Because concurrent conditionally deleting mechanism in the TA sign in increasing TA List, therefore, can paging range be controlled in the scope that core net can bear; Need not safeguard the TA viscosity gauge of 1024*8, save the expense of MME.
Description of drawings
Fig. 1 is existing tracking area tabulation TA List generation method sketch map;
Fig. 2 is a tracking area tabulation TA List update method flow chart in the embodiment of the invention;
Fig. 3 is a Mobility Management Entity MME structure chart in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment tracking area tabulation TA List update method provided by the invention and MME are illustrated in greater detail.
In the LTE network, whole network's coverage area is divided into several tracking areas TA, and several TA form a TA List.The effect of TA List is to help core net can under the network overhead that can bear, find UE rapidly.Because the position of UE is indefinite, and is transportable.If TA List is too small, when UE at the edge of two TA List during move left and right, the position of carrying out that inappropriate TA List can let network not stop is upgraded, TA List scope is excessive, then causes the eNB paging load overweight.So improve the efficient that Track Area List distributes, that reduces as far as possible that Track Area do not stop to redistribute maybe and reduce paging load.
Prior art has proposed the dynamic generating algorithm of TA List based on " two TA viscosities " notion, but realizes more complicated, needs to safeguard the viscosity gauge of a 1024*8, and does not consider the mobility characteristic of each UE.And the present invention has provided a kind of tracking area tabulation TA List update method, when reducing the MME expense, realizes the efficient balance between position update frequency and paging range effectively, and as shown in Figure 2, this method comprises:
UE can send attach request attach request message to network side in attaching process, carried tracking area TAI in this message; This TAI has identified the tracking area that UE gets in attaching process; Therefore, in the attaching process, comprise this TAI among the TA List for the UE distribution; Particularly, through TA List is accepted attach accept message the TA List that distributes is sent to UE through adhering to.
Owing to be not assigned with TA List before the UE; The TA List that distribute this moment can only comprise above-mentioned TAI; Also can in TA List, increase the adjacent area of the TA of at least one this TAI sign at random; For the entry time of this adjacent area, can be set to more forward than the entry time that gets into the TA that gets in the attaching process.
Step 202, in the mobility management process after adhering to, when confirming the new TA of entering of UE, record entry time, the sign of judging the new TA that gets into whether in TA List, if, execution in step 203, otherwise execution in step 204;
That is, a TA who identifies in by TAI List as UE enters into another one TA, needs to upgrade the entry time of the new TA of entering, and does not need to be again MME distribution T AI List.
Promptly; When UE gets into a new and TA not sign of the TAI in existing TAI List; The TAI that MME is new with this joins and forms new TAI List among the existing TAI List, and new TAI List is distributed to UE, and the record entry time; Preferably, can also entry time be also contained among the TAI List and send to UE.
The method that the embodiment of the invention provides need not safeguarded the TA viscosity gauge of 1024*8, saves the expense of MME; Owing to consider the mobility rule of each UE; Only need write down the entry time of each TA, can distribute an optimum relatively TAI List, promptly with the entry time automatic distribution T A List of information as a reference to each user; To each UE distribution T AI List targetedly, the frequency that can dip effectively and upgrade; Because concurrent conditionally deleting mechanism in the TA sign in increasing TA List, therefore, can paging range be controlled in the scope that core net can bear.
The method that the embodiment of the invention provides need not the engineering staff and participates in, core net just can be for each user distributes an optimum relatively TAI List, has reduced frequency that upgrades the position and the expense that has reduced MME as far as possible.Even the position renewal rear section user who reaches through several times need not redistribute TAI List in considerable time.
Preferably, the above-mentioned concurrent conditionally deleting mechanism that takes into account the angle of incidence can be specially:
After the sign of definite TA that will newly get into joins TA List; The sign of TA among the TA List surpasses sets quantity; Be that TAI List is when having expired; According to the entry time that the UE of record gets into each TA that identifies among the TA List, the sign of at least one TA of deletion from the TA List of last sub-distribution.Above-mentioned setting quantity can also can be disposed by MME by the size configure of UE according to self-ability.
When TAI List has expired; Deleting mechanism particularly can be according to priority order from low to high, the sign of at least one TA of deletion from the TA List of last sub-distribution; Wherein the entry time of UE entering TA is forward more, and the sign priority of this TA is low more.
Further preferably, when TAI List has expired, from the TA List of last sub-distribution, delete the sign of a most forward TA of entry time.
Preferably; Satisfying when imposing a condition in the embodiment of the invention; The sign of at least one TA of deletion from the TA List of last sub-distribution specifically comprises: confirm that entry time that UE gets into TA surpassed when setting duration apart from the current time, deleted the sign of this TA from the TA List of last sub-distribution.At this moment, also can be provided with and lowest threshold, do not establish lowest threshold if surpass, no longer deletion then, the lowest threshold here is lower than the setting quantity of the situation that above-mentioned TAI List expired.
Preferably, the mobility management process after above-mentioned adhering to specifically comprises: switch Intra-MMEHandover process, tracing section updating TAU process, services request Service Request process between MME.
Preferably, in the embodiment of the invention, when confirming to initiate paging to said UE, the evolution base station eNB in said TA List in the TA zone that sign identified of all TA is initiated paging.
Preferably, in the embodiment of the invention, UE moves in the TA list scope of being distributed, and except that periodic location update, does not initiate position updating process.
Based on same inventive concept; A kind of Mobility Management Entity MME also is provided in the embodiment of the invention; Because the principle that this MME deals with problems is similar with a kind of tracking area tabulation TA List update method, so the enforcement of these devices can repeat part and repeat no more referring to the enforcement of method.
As shown in Figure 3, the embodiment of the invention provides a kind of Mobility Management Entity MME, comprising:
Upgrade allocation units 302, in the mobility management process after adhering to, when confirming TA of the new entering of UE; Record entry time, the sign of judging the new TA that gets into whether in TA List, if; Upgrade the entry time of the new TA of entering; If do not exist, upgrade TAList and distribute to UE: in the TA of last sub-distribution List, add the sign of the new TA that gets into, the entry time that gets into each TA according to the UE of record through following mode; Satisfy when imposing a condition the sign of at least one TA of deletion from the TA List of last sub-distribution.
Preferably, upgrade allocation units 302 when satisfied imposing a condition, the sign of at least one TA of deletion from the TA List of last sub-distribution specifically comprises:
After the sign of definite TA that will newly get into joined TA List, the sign of the TA among the TA List surpassed when setting quantity, the sign of at least one TA of deletion from the TA List of last sub-distribution.
Preferably; Upgrade allocation units 302 are deleted at least one TA from the TA List of last sub-distribution sign; Specifically comprise: according to priority order from low to high; The sign of at least one TA of deletion from the TA List of last sub-distribution, wherein the entry time of UE entering TA is forward more, and the sign priority of this TA is low more.
Preferably, upgrade allocation units 302 are deleted at least one TA from the TA List of last sub-distribution sign, specifically comprise: the sign of from the TAList of last sub-distribution, deleting a most forward TA of entry time.
Perhaps; Upgrading allocation units 302 satisfies when imposing a condition; The sign of at least one TA of deletion from the TA List of last sub-distribution specifically comprises: confirm that entry time that UE gets into TA surpassed when setting duration apart from the current time, deleted the sign of this TA from the TA List of last sub-distribution.
Preferably, this MME also comprises:
Paging unit 303, when being used for confirming initiating paging to said UE, the evolution base station eNB in said TA List in the TA zone that sign identified of all TA is initiated paging.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the present invention can be employed in the form that one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code go up the computer program of implementing.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out through the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in ability vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work; Make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device; Make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of on computer or other programmable devices, carrying out is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic inventive concept could of cicada, then can make other change and modification to these embodiment.So accompanying claims is intended to be interpreted as all changes and the modification that comprises preferred embodiment and fall into the scope of the invention.
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, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1. a tracking area tabulation TA List update method is characterized in that, comprising:
In the attaching process of UE, be UE distribution T A List, comprise the sign of the tracking area TA that UE gets among the said TA List in attaching process, and the entry time of the TA that in attaching process, gets into of record UE;
In the mobility management process after adhering to, when confirming TA of the new entering of UE, the record entry time; The sign of judging the new TA that gets into whether in TA List, if, upgrade the entry time of the new TA of entering; If do not exist, upgrade TA List and distribute to UE: in the TA of last sub-distribution List, add the sign of the new TA that gets into, the entry time that gets into each TA according to the UE of record through following mode; Satisfy when imposing a condition the sign of at least one TA of deletion from the TA List of last sub-distribution.
2. the method for claim 1 is characterized in that, satisfies when imposing a condition, and the sign of at least one TA of deletion from the TA List of last sub-distribution specifically comprises:
After the sign of definite TA that will newly get into joined TA List, the sign of the TA among the TA List surpassed when setting quantity, the sign of at least one TA of deletion from the TA List of last sub-distribution.
3. method as claimed in claim 2 is characterized in that, the sign of at least one TA of deletion from the TA List of last sub-distribution specifically comprises:
According to priority order from low to high, the sign of at least one TA of deletion from the TA List of last sub-distribution, wherein the entry time of UE entering TA is forward more, and the sign priority of this TA is low more.
4. method as claimed in claim 3 is characterized in that, the sign of at least one TA of deletion from the TA List of last sub-distribution specifically comprises:
From the TA List of last sub-distribution, delete the sign of a most forward TA of entry time.
5. the method for claim 1 is characterized in that, satisfies when imposing a condition, and the sign of at least one TA of deletion from the TA List of last sub-distribution specifically comprises:
Confirm that entry time that UE gets into TA surpassed when setting duration apart from the current time, deleted the sign of this TA from the TA List of last sub-distribution.
6. the method for claim 1 is characterized in that, the mobility management process after said adhering to specifically comprises: handoff procedure, tracing section updating TAU process, service request procedure between MME.
7. the method for claim 1 is characterized in that, further comprises:
When confirming to initiate paging to said UE, the evolution base station eNB in said TA List in the TA zone that sign identified of all TA is initiated paging.
8. a Mobility Management Entity MME is characterized in that, comprising:
The original allocation unit is used for the attaching process at UE, is UE distribution T A List, and said TA List comprises the sign of the tracking area TA that UE gets in attaching process, and the entry time of the TA that in attaching process, gets into of record UE;
Upgrade allocation units, in the mobility management process after adhering to, when confirming TA of the new entering of UE; Record entry time, the sign of judging the new TA that gets into whether in TA List, if; Upgrade the entry time of the new TA of entering; If do not exist, upgrade TA List and distribute to UE: in the TA of last sub-distribution List, add the sign of the new TA that gets into, the entry time that gets into each TA according to the UE of record through following mode; Satisfy when imposing a condition the sign of at least one TA of deletion from the TA List of last sub-distribution.
9. MME as claimed in claim 8 is characterized in that, upgrades allocation units and satisfies when imposing a condition, and the sign of at least one TA of deletion from the TA List of last sub-distribution specifically comprises:
After the sign of definite TA that will newly get into joined TA List, the sign of the TA among the TA List surpassed when setting quantity, the sign of at least one TA of deletion from the TA List of last sub-distribution.
10. MME as claimed in claim 9 is characterized in that, upgrades allocation units are deleted at least one TA from the TA List of last sub-distribution sign, specifically comprises:
According to priority order from low to high, the sign of at least one TA of deletion from the TA List of last sub-distribution, wherein the entry time of UE entering TA is forward more, and the sign priority of this TA is low more.
11. MME as claimed in claim 10 is characterized in that, upgrades allocation units are deleted at least one TA from TA List sign, specifically comprises:
From the TA List of last sub-distribution, delete the sign of a most forward TA of entry time.
12. MME as claimed in claim 8 is characterized in that, upgrades allocation units and satisfies when imposing a condition, the sign of at least one TA of deletion from the TA List of last sub-distribution specifically comprises:
Confirm that entry time that UE gets into TA surpassed when setting duration apart from the current time, deleted the sign of this TA from the TA List of last sub-distribution.
13. MME as claimed in claim 8 is characterized in that, also comprises:
Paging unit, when being used for confirming initiating paging to said UE, the evolution base station eNB in said TA List in the TA zone that sign identified of all TA is initiated paging.
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| CN102843711A (en) * | 2012-08-20 | 2012-12-26 | 大唐移动通信设备有限公司 | Method and device for maintaining tracking area list of user equipment in LTE system |
| WO2014067049A1 (en) * | 2012-10-29 | 2014-05-08 | Empire Technology Development Llc | Mobility management for lte network for high-speed railway |
| CN104768196A (en) * | 2015-04-21 | 2015-07-08 | 四川西结微波科技发展有限责任公司 | Cluster group seamless switching method |
| CN105657685A (en) * | 2014-11-14 | 2016-06-08 | 上海贝尔股份有限公司 | Method and device for obtaining TAI (Tracking Area Identify) information |
| CN111247847A (en) * | 2017-08-28 | 2020-06-05 | Oppo广东移动通信有限公司 | Method for paging, access network equipment and terminal equipment |
| CN111757267A (en) * | 2019-03-29 | 2020-10-09 | 华为技术有限公司 | Satellite tracking area updating method and related device |
| CN113141575A (en) * | 2021-04-26 | 2021-07-20 | Tcl通讯（宁波）有限公司 | Method, device and equipment for updating tracking area list and storage medium |
| CN113950000A (en) * | 2020-07-16 | 2022-01-18 | 大唐移动通信设备有限公司 | Tracking area management method and network side equipment |
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| CN102843711A (en) * | 2012-08-20 | 2012-12-26 | 大唐移动通信设备有限公司 | Method and device for maintaining tracking area list of user equipment in LTE system |
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| CN111247847A (en) * | 2017-08-28 | 2020-06-05 | Oppo广东移动通信有限公司 | Method for paging, access network equipment and terminal equipment |
| CN111757267A (en) * | 2019-03-29 | 2020-10-09 | 华为技术有限公司 | Satellite tracking area updating method and related device |
| CN111757267B (en) * | 2019-03-29 | 2022-01-11 | 华为技术有限公司 | Satellite tracking area updating method and related device |
| CN113950000A (en) * | 2020-07-16 | 2022-01-18 | 大唐移动通信设备有限公司 | Tracking area management method and network side equipment |
| CN113141575A (en) * | 2021-04-26 | 2021-07-20 | Tcl通讯（宁波）有限公司 | Method, device and equipment for updating tracking area list and storage medium |
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Application publication date: 20120627 |