CN102685814B - The machinery of consultation of the medium and small interval mobile reselecting parameters of LTE network - Google Patents
The machinery of consultation of the medium and small interval mobile reselecting parameters of LTE network Download PDFInfo
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- CN102685814B CN102685814B CN201110062757.XA CN201110062757A CN102685814B CN 102685814 B CN102685814 B CN 102685814B CN 201110062757 A CN201110062757 A CN 201110062757A CN 102685814 B CN102685814 B CN 102685814B
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Abstract
The invention discloses the machinery of consultation of the medium and small interval mobile reselecting parameters of a kind of LTE network, including: step one, source base station is according to own load and neighboring cell loading situation, it is judged that needs the moving parameter adjusted, and then calculates the source base station and the moving parameter knots modification of target BS needing to adjust；Step 2, source base station sends moving parameter amendment request to target BS, and this request comprises the reselecting parameters knots modification of source base station and the suggestion reselecting parameters knots modification to target BS proposition；Step 3, target BS accepts or after refusal moving parameter amendment request, sends to source base station and accepts or the signaling of refusal moving parameter amendment request；Step 4, source base station receives described signaling；If target BS receives moving parameter amendment request, then the reselecting parameters of self is all adjusted by target BS and source base station.The present invention reduces the number of times of ping-pong reselection, alleviate that switching and reselecting parameters occur when not mating switches the negative influence bringing system immediately.
Description
Technical field
The invention belongs to radio honeycomb communication technical field, relate to the medium and small interval mobile reselecting parameters of a kind of LTE network
Machinery of consultation.
Background technology
LTE (Long Term Evolution) network is by E-UTRAN (Evolved UTRAN) base station eNB (Evolved
NodeB) form with evolution packet switching center EPC (Evolved Packet Core), network flattening.Wherein E-UTRAN bag
Contain the set of the eNB connected by S1 interface with EPC, can be connected by X2 between eNB.S1, X2 are logic interfacing.One EPC
Can manage one or more eNB, an eNB and can also be controlled by multiple EPC, an eNB can manage one or more little
District.
MANET (Self-Organized Network, SON) is a kind of technology automatically carrying out network configuration and optimization.
The feature of this technology is self-configuring self-optimizing, and this technology is applied in LTE and made the LTE base station (eNB) can be according to certain survey
Amount automatically configures network parameter, and carries out Automatic Optimal according to network change, thus keeps network performance optimum, saves big simultaneously
The manpower and materials of amount.One research point of MANET is mobility load balance optimization (Mobility Load
BalancingOptimization, MLB) problem.This problem requires that solving the mobile minizone that is supported in LTE system is distributed
Unbalanced problem, and minimize the switching times reaching the mobile terminal needed for load balancing in minizone.
In current LTE standard, Intra-LTE load balancing process is next real by adjusting community switching/reselecting parameters
Existing, namely realize the adjustment to community handoff parameter by mutual moving parameter amendment signaling between the base stations.But
Current standard is not specified by the adjustment of minizone reselecting parameters and is also required to interact negotiation.When source base station eNB1 is to target base
When the eNB2 that stands initiates moving parameter amendment request to change handover between cells parameter and arrange, source base station and target BS are in order to coordinate
The amendment of handoff parameter is likely to revise the cell reselection parameters of each of which.Current LTE standard does not also define community weight
Mutual relation between the handoff parameter of Radix Ginseng selection Shuo He community, therefore base station may use different algorithms to revise respective community
Reselecting parameters.Such as, the handoff parameter of source base station amendment oneself, knots modification is 3dB, and source base station moves by sending to target BS
Dynamic parameter switching request, it is desirable to revising its handoff parameter, knots modification is also 3dB.If this moving parameter negotiations process success
Completing, then source base station and target BS can successfully revise respective handoff parameter, knots modification is all 3dB.Meanwhile, source base station
May the cell reselection parameters of each self-modifying self with target BS.But, cell reselection is joined by source base station and target BS
The knots modification of number is by each determining.Such as, the amendment amount of source base station may be 1dB, and the amendment amount that target BS realizes
For 2dB；Or two amendment amounts are respectively 3dB and 0dB.As can be seen here, unmatched amendment amount can cause cell reselection border
And not mating between handoff boundary.The most negotiated cell reselection parameters arranges and is likely to result in gravity treatment limit between neighbor cell
Boundary does not mates, and then is likely to cause the ping-pong reselection of minizone；And community handoff parameter is arranged and reselecting parameters is arranged not
Coupling can cause the gravity treatment border of community and handoff boundary not to mate, thus causes UE to have when holding state enters connection status
It may happen that switch immediately.
In sum, the reselecting parameters that shortage is consulted arranges and higher minizone ping-pong reselection and terminal can be caused from treating
Machine state occurs after becoming connection status to switch immediately, and system resource all can be caused waste by this.Therefore the gravity treatment ginseng of minizone
It is necessary that number is consulted to arrange.
Summary of the invention
The technical problem to be solved is: provide the negotiation of the medium and small interval mobile reselecting parameters of a kind of LTE network
Method, the method can reduce the number of times of minizone ping-pong reselection.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that.
The machinery of consultation of the medium and small interval mobile reselecting parameters of a kind of LTE network, comprises the following steps:
Step one, source base station is according to own load and neighboring cell loading situation, it is judged that needs the moving parameter adjusted, enters
And the source base station and the moving parameter knots modification of target BS needing to adjust is calculated according to load-balancing algorithm；Described mobile ginseng
Number comprises parameter Qoffset and parameter Qhyst；The process that realizes of described load-balancing algorithm is for receiving neighboring cell loading conduct
Algorithm inputs, and exports as algorithm by arranging community switching reselecting parameters threshold values；
Step 2, source base station sends moving parameter amendment request to target BS, and the amendment request of described moving parameter comprises
The reselecting parameters knots modification of source base station and the suggestion reselecting parameters knots modification to target BS proposition；
Step 3, target BS accepts or after refusal moving parameter amendment request, sends to source base station and accept or refuse
The signaling of moving parameter amendment request absolutely；If target BS receive moving parameter amendment request, then target BS according to
The reselecting parameters of self is adjusted correspondingly by described suggestion reselecting parameters knots modification；If if target BS have rejected shifting
Dynamic parameter modification request, then the reselecting parameters of self is not adjusted by target BS；
Step 4, source base station receives the signaling accepting or refusing moving parameter amendment request that target BS is replied；As
Really target BS receives moving parameter amendment request, then source base station is according to the gravity treatment to self of the described reselecting parameters knots modification
Parameter is adjusted correspondingly；If target BS have rejected moving parameter amendment request, then the source base station gravity treatment to self
Parameter does not adjusts.
The beneficial effects of the present invention is: the negotiation side of the medium and small interval mobile reselecting parameters of LTE network of the present invention
Method is mainly the setting to minizone reselecting parameters and holds consultation, and considers that minizone reselecting parameters does not mate the shadow brought simultaneously
Ring, decrease the number of times of ping-pong reselection, alleviate the switching immediately occurred when switching is not mated with reselecting parameters and system is brought
Negative influence.
Accompanying drawing explanation
Fig. 1 is minizone ping-pong reselection rate schematic diagram during Qhyst=3dB；
The ratio that when Fig. 2 is Qhyst/hyst=0dB, terminal switches over after holding state enters connection status immediately
Schematic diagram；
Fig. 3 is the flow chart of the machinery of consultation of the medium and small interval mobile reselecting parameters of LTE network of the present invention.
Detailed description of the invention
In current LTE standard, Intra-LTE load balancing process is next real by adjusting community switching/reselecting parameters
Existing, but adjusting of LTE standard not regulation minizone reselecting parameters needs through the mutual process consulted.The present invention is led to
Cross mutual moving parameter amendment signaling between the base stations and realize the negotiation that cell reselection parameters is adjusted, it is to avoid due to not
The problems such as ping-pong reselection that the amendment amount joined causes, switching immediately.The present invention is i.e. to lack gravity treatment in current LTE protocol
The definition that parameter negotiation is arranged, proposes solution.
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
Embodiment one
The present embodiment provides the machinery of consultation of the medium and small interval mobile reselecting parameters of a kind of LTE network, the realization of the method
Cheng Wei: during Intra-LTE load balancing, by utilizing existing moving parameter to revise signalling interactive process, amendment is existing
Some moving parameters amendment signaling, realizes the negotiation that minizone reselecting parameters adjusts.If this negotiations process is successfully completed,
So source base station (eNB1) and target BS (eNB2) can successfully revise respective reselecting parameters, it is to avoid is repaiied by unmatched
The problems such as ping-pong reselection that the amount of changing causes, switching immediately.The concrete cell format of moving parameter amendment request is as shown in table 1.
Table 1: the cell format of moving parameter amendment request
It is embodied as step as follows:
1) source base station (eNB1) is according to own load and neighboring cell loading situation, it is judged that need the moving parameter adjusted；
Described moving parameter comprises: Qoffset (differences required by two cell received signal quality) and Qhyst (Cell
Reselectionhysteresis, cell reselection lag parameter).(current LTE be it is generally acknowledged that load balancing is calculated by source base station
Method has been responsible for by base station) load-balancing algorithm calculate the source base station (eNB1) and target BS (eNB2) needing to adjust
Moving parameter knots modification (i.e. moving parameter needs the size changed, as 2dB changes to 4dB, then suggestion knots modification is+2dB)；
The process of load balancing is realized in handover between cells gravity treatment by mobile subscriber.Load-balancing algorithm receives neighbor cell
Load and input as algorithm, export as algorithm by arranging community switching reselecting parameters threshold values.
2) source base station (eNB1) sends moving parameter amendment request to target BS (eNB2), comprises source base station in this request
(eNB1) reselecting parameters knots modification and the suggestion reselecting parameters knots modification that target BS (eNB2) is proposed；Moving parameter is revised
The cell format of request is as shown in table 1；
3) target BS (eNB2) accept or refuse moving parameter amendment request, to source base station (eNB1) send accept or
Person refuses the signaling of moving parameter amendment request；
If target BS (eNB2) receives moving parameter amendment request, then target BS (eNB2) is according to suggestion weight
The reselecting parameters of self is adjusted correspondingly by Radix Ginseng selection number knots modification；Otherwise the reselecting parameters of self is not adjusted by target BS
Whole；
4) source base station (eNB1) receives acceptance or the refusal moving parameter amendment request that target BS (eNB2) is replied
Signaling；
If target BS (eNB2) receives moving parameter amendment request, then source base station (eNB1) is according to described gravity treatment
The reselecting parameters of self is adjusted correspondingly by parameter change amount；
If if target BS (eNB2) have rejected moving parameter amendment request, then source base station (eNB1) to self
Reselecting parameters does not adjusts.
Intra-LTE load balancing process realizes by adjusting community switching/reselecting parameters, i.e. by base station
Between mutual moving parameter amendment signaling realize the adjustment to community handoff parameter.The present invention proposes minizone reselecting parameters
Setting hold consultation, consider that minizone reselecting parameters does not mate the impact brought simultaneously, decrease the number of times of ping-pong reselection, subtract
What light switching and reselecting parameters occurred when not mating switches the negative influence bringing system immediately.
Fig. 1 is minizone ping-pong reselection rate schematic diagram during Qhyst=3dB, which show two the most negotiated community weights
The setting of Radix Ginseng selection number is likely to result in gravity treatment border between neighbor cell and does not mates, it may occur that the ping-pong reselection of up to more than 50%, seriously
Waste system resource.
The ratio that when Fig. 2 is Qhyst/hyst=0dB, terminal switches over after holding state enters connection status immediately
Schematic diagram, which show community handoff parameter setting and reselecting parameters is arranged when not mating, it may occur that the UE of up to more than 70%
Switched when holding state enters connection status event immediately, serious waste system resource.
Description of the invention and application are illustrative, are not wishing to limit the scope of the invention in above-described embodiment.
The deformation of embodiments disclosed herein and change are possible, embodiment for those skilled in the art
Replace and equivalence various parts be known.It should be appreciated by the person skilled in the art that in the essence without departing from the present invention
In the case of god or substitutive characteristics, the present invention can otherwise, structure, layout, ratio, and with other elements, material
Realize with parts.
Claims (2)
1. the machinery of consultation of the medium and small interval mobile reselecting parameters of LTE network, it is characterised in that comprise the following steps:
Step one, source base station is according to own load and neighboring cell loading situation, it is judged that need the moving parameter adjusted, Jin Ergen
Calculate the source base station and the moving parameter knots modification of target BS needing to adjust according to load-balancing algorithm, described load balancing is calculated
The process that realizes of method inputs as algorithm for receiving neighboring cell loading, by arranging community switching reselecting parameters threshold values as calculation
Method exports；
Step 2, source base station sends moving parameter amendment request to target BS, and the amendment request of described moving parameter comprises source base
The reselecting parameters knots modification stood and the suggestion reselecting parameters knots modification that target BS is proposed；Wherein, described source base station gravity treatment ginseng
Number knots modification is optional, and the suggestion reselecting parameters knots modification of described target BS is compulsory；
Step 3, target BS accepts or after refusal moving parameter amendment request, accepts to source base station transmission or refusal moves
The signaling of dynamic parameter modification request；
If target BS receives moving parameter amendment request, then target BS is according to described suggestion reselecting parameters knots modification
The reselecting parameters of self is adjusted correspondingly；
If target BS have rejected moving parameter amendment request, then the reselecting parameters of self is not adjusted by target BS；
Step 4, source base station receives the signaling accepting or refusing moving parameter amendment request that target BS is replied；
If target BS receive moving parameter amendment request, then source base station according to described reselecting parameters knots modification to self
Reselecting parameters be adjusted correspondingly；
If target BS have rejected moving parameter amendment request, then the reselecting parameters of self is not adjusted by source base station.
The machinery of consultation of the medium and small interval mobile reselecting parameters of LTE network the most according to claim 1, it is characterised in that: institute
State moving parameter and comprise parameter Qoffset and parameter Qhyst.
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| CN103796252B (en) * | 2012-11-02 | 2020-03-24 | 北京三星通信技术研究有限公司 | Method for automatically adjusting mobile parameters |
| WO2014101243A1 (en) * | 2012-12-31 | 2014-07-03 | 华为技术有限公司 | Load balancing method and network control node |
| CN105144780A (en) * | 2013-08-09 | 2015-12-09 | 富士通株式会社 | Move parameter negotiation method, apparatus and system |
| CN106550414B (en) * | 2015-09-22 | 2021-06-22 | 中兴通讯股份有限公司 | Load balancing method and device |
| CN106658599B (en) * | 2015-10-28 | 2021-08-06 | 中国移动通信集团公司 | Method, device and system for idle terminal to reside |
| CN107426751B (en) * | 2017-08-03 | 2020-03-31 | 微梦创科网络科技（中国）有限公司 | Hysteresis margin configuration method and device in Small Cell network |
| WO2019144401A1 (en) * | 2018-01-29 | 2019-08-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods, apparatuses, computer programs and computer program products for load balancing |
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| CN101616436A (en) * | 2009-07-08 | 2009-12-30 | 西安电子科技大学 | Based on the user selection switching method under the moving load equilibrating mechanism |
| CN101911776A (en) * | 2008-01-11 | 2010-12-08 | 株式会社Ntt都科摩 | Mobile communication method and wireless base station |
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| FR2840758B1 (en) * | 2002-06-11 | 2004-11-26 | Evolium Sas | METHOD FOR SUPPORTING REAL-TIME TRAFFIC IN A MOBILE RADIO COMMUNICATION SYSTEM |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101911776A (en) * | 2008-01-11 | 2010-12-08 | 株式会社Ntt都科摩 | Mobile communication method and wireless base station |
| CN101616436A (en) * | 2009-07-08 | 2009-12-30 | 西安电子科技大学 | Based on the user selection switching method under the moving load equilibrating mechanism |
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