CN103369572A - Load-based automatic neighbor relation (ANR) optimizing method in long-term evolution system - Google Patents

Load-based automatic neighbor relation (ANR) optimizing method in long-term evolution system Download PDF

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CN103369572A
CN103369572A CN2013103194856A CN201310319485A CN103369572A CN 103369572 A CN103369572 A CN 103369572A CN 2013103194856 A CN2013103194856 A CN 2013103194856A CN 201310319485 A CN201310319485 A CN 201310319485A CN 103369572 A CN103369572 A CN 103369572A
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load
base station
anr
cell
neighboring
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黄联芬
李钰洁
蔡鸿祥
高志斌
张远见
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Xiamen University
Comba Telecom Systems Guangzhou Co Ltd
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Xiamen University
Comba Telecom Systems Guangzhou Co Ltd
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Abstract

The invention discloses a load-based automatic neighbor relation (ANR) optimizing method in a long-term evolution system, which relates to the technical field of wireless communication. The automatic neighbor relation optimizing method comprises the following two stages of: optimizing an ANR during initial establishment when a neighbor list does not exist in a base station; and optimizing the ANR at a maintenance stage when the neighbor list exists in the base station. A base station device in a cell of origin of the long-term evolution system is used for interacting load state information by an X2 interface and optimizing neighbor priority in a neighbor configuration and management module according to the self-load condition information of the cell of origin, the load condition information of neighbor cells and the self-cell and the surrounding neighbor reference signal receiving power (RSRP) information reported by a mobile user terminal, so that the load balance between the adjacent cells is kept, unnecessary switching is reduced and communication quality of each cell of the system is ensured. A large effective time window is allowed due to not high real-time or data synchronization requirements.

Description

A kind of Automatic Neighboring Relation optimization method based on load in the long evolving system
Technical field
The present invention relates to wireless communication technology field, especially relate to a kind of Automatic Neighboring Relation optimization method based on load in the long evolving system.
Background technology
Automatically configuring adjacent cell concerns (Automatic Neighbor Relation, ANR) refer to be in subscriber equipment (User Equipment under the connected state, UE) relevant information of subsidiary peripheral cell, report evolution base station (eNodeB, eNB) and network side, automatically finish the function of adding and optimizing Neighboring Cell List by eNB and network side.
The core of ANR function is that eNB is to the management of neighborhood region correlation chart (Neighbor Relation List, NRL).At Long Term Evolution (Long Term Evolution, LTE) in the system, the measurement residential quarter of any given frequency, UE side its ID that can decode, the automatic maintenance update Neighboring Relation Table of eNB, Neighboring Cell List is carried out updating maintenance, and its function comprises: adjacent area measuring ability, adjacent area interpolation/delete function, adjacent area modify feature and maintenance and administration center (Operation and Maintenance, O﹠amp; M) upgrade the neighboring BS information function.Wherein, the adjacent area measuring ability is mainly finished by measurement function and X2 interface config update, and adjacent area interpolation/delete function and adjacent area modify feature are mainly finished by internal information and X2 interface config update.
The LTE system adopts multiple-input and multiple-output (Multiple Input Multiple Output, MIMO), wireless relay, the advanced technologies such as coordinating district interference, in order to reduce propagation delay time, improve user data transmission speed, guarantee user's seamless switching, adopt Mesh type network configuration.ENB interconnects by X2 interface, be connected to block core evolution (Evolved Packet Core by the S1 interface, EPC), EPC comprises MME and S-GW, eNB is connected to mobile management entity (Mobility Management Entity by S1-MME interface, MME), be connected to SGW (the Serving Gateway, S-GW) by S1-U interface.Compare with conventional cellular network, cancelled the base station controller in the legacy cellular net in the LTE structure, only comprise EPC and eNB, make UE data transfer speed rapider, the control of Radio Resource is more stable, realizes low time delay, low complex degree and low cost.
The existing main emphasis of ANR technology sets up and safeguards Neighboring Relation Table under stable network condition.
Chinese patent CN102378247A discloses a kind of method and system that realize that Automatic Neighboring Relation is measured, when definite UE is in public connected state, network side issues Automatic Neighboring Relation (ANR) measuring control information to UE, the ANR that UE carries out special-purpose control according to the ANR measuring control information that obtains measures, and to network side reporting measurement result.This invention is measured by the ANR that the UE that utilizes public connected state finishes special-purpose control, realized that Automatic Neighboring Relation reports, and, because ANR measures and finishes under the public connected state of UE, saved air resource, improve the use impression to UE, can not cause the service impact to the terminal of single user state.
Chinese patent CN102761897A discloses a kind of method and system that realize that Automatic Neighboring Relation is measured, before comprising that UE carries out the ANR measurement, the ANR that network side will include dissimilar ANR measurement scheduling relevant control parameter measures the control configuration parameter, send to UE, when UE carries out the ANR measurement, according to receive dissimilar ANR measurement scheduling relevant control parameter is measured dissimilar adjacent unknown cell.In this invention, UE measures the ratio of controlling configuration parameter according to the ANR to dissimilar ANR measurement scheduling relevant control parameter that receives, and dissimilar adjacent unknown cell is measured.Like this, UE is under certain network expectation, removes more targetedly to carry out ANR measurement log, rather than pure carrying out according to Best Effort, thereby has improved the performance of ANR measurement log, has carried out the ANR that quality assurance is arranged and has measured.
Chinese patent CN102448128A discloses a kind of base station, terminal and Automatic Neighboring Relation detection, adding method and system, issue to comprise by the base station and default detect the detection instruction of frequency to terminal, then terminal is according to described detection instruction detected cells on default detection frequency, the cell information that detected signal strength signal intensity is satisfied pre-conditioned residential quarter feeds back to the base station, and the base station then judges whether to exist new adjacent area according to these cell informations.Namely should invent when detecting the adjacent area, be not to issue the base station at the cell information of all residential quarters that the detection frequency detects, but the cell information that only signal strength signal intensity is satisfied pre-conditioned residential quarter is issued the base station, therefore can effectively screen detected residential quarter, can greatly reduce the redundant information in the neighboring BS relationship layoutprocedure, simplify the process that neighboring BS relationship is safeguarded, improve the efficient that neighboring BS relationship is safeguarded, and terminal is when switching, also the adjacent area that will switch be can directly find as soon as possible, efficient and success rate that terminal is switched improved.
Summary of the invention
The object of the present invention is to provide a kind of Automatic Neighboring Relation optimization method based on load in the long evolving system.
The present invention includes two stages, the stage one is the initial optimization of setting up of ANR, and namely when not having Neighboring Cell List in the base station, the stage two is the optimization of ANR maintenance phase, namely when having Neighboring Cell List in the base station;
The described stage one may further comprise the steps:
1) exchange of load information is carried out in base station and adjacent base station, obtains the adjacent area load value;
2) base station side sends automatic configuring adjacent cell relation (ANR) to subscriber equipment (UE) side and measures indication, obtains subscriber equipment (UE) and reports Reference Signal Received Power (Reference Signal Receiving Power is abbreviated as RSRP) metrical information;
3) adjacent area load value and the step 2 step 1) obtained) subscriber equipment (UE) that obtains reports Reference Signal Received Power (RSRP) metrical information to optimize Neighboring Cell List;
4) the base station judgement adds neighboring BS relationship with detected cells, base station O﹠amp; M system management ANR Blacklist and ANR Whitelist.
In step 1), the exchange of load information is carried out in described base station and adjacent base station, and the concrete grammar that obtains the adjacent area load value can be: between base station and adjacent base station by X2 interface (X2 be a kind of base station of defining among the 3G (Third Generation) Moblie technical specification 3GPP of mechanism and the logic interfacing between the base station) exchange load information; Described adjacent area comprises all neighbor cells around this residential quarter.
In step 2) in, described base station side can be to the concrete grammar that subscriber equipment (UE) side sends automatic configuring adjacent cell relation (ANR) measurement indication:
A. base station side sends MAC(Medium Access Control, medium access control) the DRX order MAC Control Element informational message of layer, comprise that in described message at least one field is used to refer to ANR and measures;
B. base station side sends the special-purpose control message of MAC layer, measures by described specific messages indication ANR;
C. base station side sends RRC(Radio Resource Control, Radio Resource control) control message of layer, send ANR by described rrc layer message indication MAC layer and measure indication.
In step 2) in, subscriber equipment (UE) reports Reference Signal Received Power (RSRP) metrical information, and UE is by measuring RSRP at coherent reference signal (pilot signal) power that adds of the subframe of complete Measurement bandwidth, and measuring process is filtering sampling, r nThe filter measurement result who upgrades, r N-1Old filter measurement result, q nBe the most recent measurements that terminal point is received, K is the filter coefficient that network provides, and filtering sampling is expressed as:
r n = { 1 - ( 1 2 ) k / 4 } × r n - 1 + ( 1 2 ) k / 4 × q n .
In step 3), the RSRP information that described residential quarter reports load value and the UE of adjacent area is upgraded the priority of Neighboring Cell List simultaneously as weights, Neighboring Cell List obtain the detected cells that is reported by UE, the adjacent area load value L that obtains with eNB LoadJointly as weights, Neighboring Cell List is carried out the further optimization of priority, then Neighboring Cell List L LinCan be expressed as
L lin=αRSRP+βL load。
The described stage two may further comprise the steps:
5) as ANR during at maintenance phase, the load condition of the measurement self in each residential quarter cycle in the cell cluster;
6) load state information with self sends to adjacent cell, and the reception residential quarter dynamically updates the load state information of neighbor cell;
7) receive the residential quarter according to the load information L of adjacent cell LoadDynamically update Neighboring Cell List, Neighboring Cell List is carried out the further optimization of priority;
8) the base station judgement is with base station O﹠amp; M system update Neighboring Cell List;
9) NRL of base station side dynamically updates maintenance neighborlist, and when UE sent handover request to eNB, eNB will inquire about Neighboring Relation Table and determine the optimal objective cell information;
10) repeating step 5)～9);
When 11) the overweight needs of cell load carry out the load transfer, select the underloading adjacent cell to carry out load and shift.The concrete adjacent cell list for search self, the neighboring cell loading state that detects in this cell cluster is light load cell or overloaded cells, but just the underloading adjacent cell is carried out the load transfer.
Because user's rate travel is lower, and load is the statistical value of a period of time, so the present invention is not very high to the requirement to real-time or data synchronism, allows larger window effective time.
There are the following problems at least for prior art:
The at present renewal of neighboring BS relationship mainly depends in being in UE under the connected state to the measurement of the relevant information of peripheral cell, UE does not need the guidance of known Neighboring Cell List when measuring, collect physical layer information and relevant high layer information, system acquisition GCI(Global Cell Identity, whole world residential quarter ID) be long job consuming time, UE exists certain translational speed, in long Measuring Time, only might be undetected by UE, or the false retrieval residential quarter.In addition, in existing UE measures, need UE to be in DRX(Discontinuous Reception, discontinuous reception) sleep period, in case data access is arranged, UE may interrupt the measurement of ANR at any time, and the current ANR measurement data of base station and network side is measured less than assurance.On the other hand when offered load is too concentrated, the localised inter-cell load imbalance appears, cause metrical information that the UE of part residential quarter reports too much and the metrical information that part residential quarter UE reports is very few, too much the collection of information and the redundant transmission of processing complicated, a large amount of related datas of data screening that cause network side and base station are to the consumption of energy and taking for the treatment of progress; And the metrical information that obtains is very few, then so that there is larger error in statistics, makes the certainty of measurement of ANR not reach requirement.And these technology lack the guarantee to the handover success rate in the unbalanced situation of local cell load.
The present invention has the following advantages: optimize Neighboring Cell List according to the adjacent area load condition, can realize reposefully the automatic renewal of Neighboring Cell List, reduced the network interaction load, avoid selecting UE to carry out unnecessary measurement, improved the utilance of Radio Resource, thereby the load of having optimized the minizone is shifted, guarantee effective sector switch, avoided pingpang handoff, reduced cutting off rate, Neighboring Cell List and load balancing have been reached the optimization equilibrium that continues.Because user's rate travel is lower, and load is the statistical value of a period of time, so the present invention is not very high to the requirement of real-time or data synchronism, allows larger window effective time.
Description of drawings
Fig. 1 is a kind of ANR optimization method phase I schematic diagram based on load.
Fig. 2 is a kind of ANR optimization method second stage schematic diagram based on load.
Fig. 3 realizes the load transfer based on the ANR optimization method of load.
Embodiment
The present invention is further illustrated in connection with accompanying drawing for following examples.
It is a kind of based on the ANR optimization method that the embodiment of the invention provides, and the present invention includes two stages, the optimization that the phase I is applicable to ANR when initially setting up.
1) as shown in Figure 1, the exchange of load information is carried out in the base station, obtains the adjacent area load value.Between base station and neighbor base station by X2 interface (X2 be a kind of base station of defining among the 3G (Third Generation) Moblie technical specification 3GPP of mechanism and the logic interfacing between the base station) exchange load information.
At first when carrying out adjacent cell planning, between neighbor cell, can freely switch all adjacent cells around Neighboring Relation Table should comprise in order to guarantee travelling carriage.Concrete, the measurement of the load state information of self is finished in each residential quarter in the cell cluster, and the load state information with self sends to adjacent cell simultaneously, and the reception residential quarter is stored into the load state information of neighbor cell in the adjacent cell list of self.
Load value must calculate and can calculate with Resource Block and total resources piece by current in the residential quarter, supposes that the total Physical Resource Block in residential quarter is M PRE, the user applies for that service rate is D u, the speed that each Resource Block of user u can provide is R (SINR u), load value L LoadComputational methods as follows:
L load = 1 M PRE · Σ X ( u ) D u R ( SINR u )
The another kind of computational methods of load can be calculated by the capacity of overall system capacity in the residential quarter and current usefulness, suppose that the residential quarter total system capacity is C Total, the current capacity that uses in residential quarter is C Current, load value L LoadAnother kind of computational methods can for:
L load = C current C total
Receive the residential quarter according to the load information of adjacent cell, can divide into several grades with little, for example the supposing the system overload threshold is 60%, the span of the load capacity that each load condition is corresponding is: light condition 0%～30%, in carry state 30%～60%, heavy condition 60%～80%, serious overload 80%～100%, according to the cell load value, microzonation is divided into several grades.The listed cell conditions of table 1 for example.
Table 1 adjacent area loading condition
Residential quarter 1 Underloading
Residential quarter 2 In carry
Residential quarter 3 Underloading
Residential quarter 4 Serious overload
Residential quarter 5 Underloading
Residential quarter 6 Heavy duty
Residential quarter 7 In carry
2) base station side sends to subscriber equipment (UE) and carries out the indication that automatic configuring adjacent cell relation (ANR) is measured.
Described UE starts ANR and measures according to the indication of carrying out the ANR measurement that described base station side sends.Base station side sends the indication that ANR measures to described UE, comprises 3 kinds of modes:
A. base station side sends MAC(Medium Access Control, medium access control) the DRX order MAC Control Element informational message of layer, comprise that in described message at least one field is used to refer to ANR and measures;
B. base station side sends the special-purpose control message of MAC layer, measures by described specific messages indication ANR;
C. base station side sends RRC(Radio Resource Control, Radio Resource control) control message of layer, send ANR by described rrc layer message indication MAC layer and measure indication.
In step 2) in, described subscriber equipment (UE) carries out ANR to be measured, and reports RSRP(Reference Signal Receiving Power, Reference Signal Received Power to base station side) information.UE is by measuring RSRP at coherent reference signal (pilot signal) power that adds of the subframe of complete Measurement bandwidth, and measuring process is filtering sampling, r nThe filter measurement result who upgrades, r N-1Old filter measurement result, q nBe the most recent measurements that terminal point is received, K is the filter coefficient that network provides, and filtering sampling is expressed as:
r n = { 1 - ( 1 2 ) k / 4 } × r n - 1 + ( 1 2 ) k / 4 × q n
3) adjacent area load value and the step 2 step 1) obtained) subscriber equipment (UE) that obtains reports Reference Signal Received Power (RSRP) metrical information to optimize Neighboring Cell List.The RSRP information that described residential quarter reports load value and the UE of adjacent area is upgraded the priority of Neighboring Cell List simultaneously as weights.Neighboring Cell List obtain the detected cells that is reported by UE, the adjacent area load value Lload that obtains with eNB carries out the further optimization of priority jointly as weights to Neighboring Cell List.Neighboring Cell List L then LinCan be expressed as
L lin=αRSRP+βL load
4) described base station judgement adds neighboring BS relationship with detected cells, base station O﹠amp; M system management ANR Blacklist and ANRWhitelist.
When 5) described cell load is overweight, need to carries out load and shift, search for the adjacent cell list of self, the neighboring cell loading state that detects in this cell cluster is light load cell or overloaded cells, just can select the underloading adjacent cell to carry out load and shift.
The embodiment of the invention has the following advantages: behind the optimizing neighbor list based on load condition, the base station can effectively be screened the monitoring residential quarter, greatly reduce the redundant information in the neighboring BS relationship layoutprocedure, simplified the neighboring BS relationship maintenance process, improved maintenance efficiency.When the load transfer need to be carried out in the overload residential quarter, the base station preferentially selects Neighboring Cell List priority high, load is that near the UE in the adjacent area of underloading switches, can effectively carry out flexibly cell load shifts, basically reach the minizone homeostasis of load, guarantee handover success rate, optimize whole network performance.For example the residential quarter in the described figure 4 originally is serious overload, but because the adjusting in the Neighboring Relation Table, so that the user carries out when switching having finished the load transfer after the residential quarter is selected, described residential quarter 4 is transferred to described residential quarter 3 and the above residential quarter 5 in the adjacent area with load, so the serious overload situations of described residential quarter 4 can be eased, described residential quarter 6 also has been transferred to load described residential quarter 5 at this moment, the load capacity of described residential quarter 5 has increased, and the load capacity of described residential quarter 4 and residential quarter 6 has reduced, Neighboring Cell List is upgraded in variation by load capacity, this adjacent cell priority of reduction that load is heavy, this native region priority of the raising of load reduction, just can optimize in time the priority of adjacent area, when a moment, the user need to be switched instantly, can provide better signal strength signal intensity high, the switching adjacent area target that loading condition is good, assurance user's speech quality.
It is a kind of based on the ANR optimization method that the embodiment of the invention provides, and the present invention includes two stages, and second stage is applicable to the optimization of ANR maintenance phase, as shown in Figure 2.
6) as ANR during at maintenance phase, the load condition of the measurement self in each residential quarter cycle in the cell cluster;
7) load state information with self sends to adjacent cell, and the reception residential quarter dynamically updates the load state information of neighbor cell;
8) receive the residential quarter according to the load information L of adjacent cell LoadDynamically update Neighboring Cell List, Neighboring Cell List is carried out the further optimization of priority;
9) the base station judgement is with base station O﹠amp; M system update Neighboring Cell List;
10) NRL of base station side dynamically updates maintenance neighborlist, and when UE sent handover request to eNB, eNB will inquire about Neighboring Relation Table and determine the optimal objective cell information;
11) repeating step 6)～10);
When 12) the overweight needs of cell load carry out the load transfer, select the underloading adjacent cell to carry out load and shift.The concrete adjacent cell list for search self, the neighboring cell loading state that detects in this cell cluster is light load cell or overloaded cells, but just the underloading adjacent cell is carried out the load transfer.
Because user's rate travel is lower, and load is the statistical value of a period of time, so the present invention is not very high to the requirement to real-time or data synchronism, allows larger window effective time.
The embodiment of the invention illustrates in greater detail when the load imbalance by Fig. 3, based on the detailed step of load to Neighborhood Optimization embodiment.
1, step 401, described base station side be self load information of detected cells periodically;
2, step 403, described cell-of-origin and adjacent base station are by the mutual load information separately of X2 interface;
3, step 404, described cell-of-origin judges whether to trigger mobility load balance simultaneously, if the load of described residential quarter surpasses system load thresholding C(L Load＞C), then execution in step 405, if the load of described residential quarter is lower than system load thresholding C(L Load＜C), described base station is the load information of periodic detected cells self still, execution in step 401;
4, step 404, Neighboring Cell List priority is upgraded by the adjacent area load capacity in described cell-of-origin;
5, step 405, described cell-of-origin be select target mobility load balance residential quarter in Neighboring Cell List.At first determine the load capacity that needs shift according to the load information of self, secondly the priority of neighbor cell is determined the balanced residential quarter of targeted loads that load is shifted in according to Neighboring Cell List;
6, step 406, described cell-of-origin and Target cell are consulted handoff parameter.The load capacity that shifts is as required consulted change handoff parameter separately with the balanced residential quarter of targeted loads, mainly comprises handoff threshold value and hysteresis margin here;
7, step 407, described cell-of-origin select suitable user to carry out the load transfer.Corresponding resource is reserved in the load capacity request target load balancing residential quarter of shifting as required, according to handoff threshold value and the hysteresis margin after changing, selects the user who satisfies condition to switch;
8, after the user shifts and finishes, turn to step 401.
The embodiment of the invention comprises following advantage, Neighboring Cell List based on load condition can dynamically automatically carry out Continuous optimization for a long time, having reduced unnecessary UE measures, saved signaling consumption, improved the RRM utilance, the base station can effectively be screened the residential quarter of required monitoring, has reduced the redundant information in the neighboring BS relationship layoutprocedure, simplify the neighboring BS relationship maintenance process, improve maintenance efficiency.When the load transfer need to be carried out in the overload residential quarter, the base station preferentially selects Neighboring Cell List priority high, load is that the load transfer is carried out in the adjacent area of underloading, guarantee handover success rate, thereby realize that the load transfer is continual and steady, alleviated the workload of load control module or mobility load balance module, whole network performance obtains long-term automatically optimization.

Claims (5)

1. a kind of Automatic Neighboring Relation optimization method based on load in the long evolving system, it is characterized in that comprising two stages, the stage one is the initial optimization of setting up of ANR, namely when not having Neighboring Cell List in the base station, stage two is the optimization of ANR maintenance phase, namely when having Neighboring Cell List in the base station;
The described stage one may further comprise the steps:
1) exchange of load information is carried out in base station and adjacent base station, obtains the adjacent area load value;
2) base station side sends automatic configuring adjacent cell relation to user equipment side and measures indication, obtains user equipment to report Reference Signal Received Power metrical information;
3) adjacent area load value and the step 2 step 1) obtained) the user equipment to report Reference Signal Received Power metrical information that obtains optimizes Neighboring Cell List;
4) the base station judgement adds neighboring BS relationship with detected cells, base station O﹠amp; M system management ANR Blacklist and ANR Whitelist;
The described stage two may further comprise the steps:
5) as ANR during at maintenance phase, the load condition of the measurement self in each residential quarter cycle in the cell cluster;
6) load state information with self sends to adjacent cell, and the reception residential quarter dynamically updates the load state information of neighbor cell;
7) receive the residential quarter according to the load information L of adjacent cell LoadDynamically update Neighboring Cell List, Neighboring Cell List is carried out the further optimization of priority;
8) the base station judgement is with base station O﹠amp; M system update Neighboring Cell List;
9) NRL of base station side dynamically updates maintenance neighborlist, and when UE sent handover request to eNB, eNB will inquire about Neighboring Relation Table and determine the optimal objective cell information;
10) repeating step 5)～9);
When 11) the overweight needs of cell load carry out the load transfer, select the underloading adjacent cell to carry out load and shift.The concrete adjacent cell list for search self, the neighboring cell loading state that detects in this cell cluster is light load cell or overloaded cells, but just the underloading adjacent cell is carried out the load transfer.
2. a kind of Automatic Neighboring Relation optimization method based on load in the long evolving system as claimed in claim 1, it is characterized in that in stage one step 1), the exchange of load information is carried out in described base station and adjacent base station, and the concrete grammar that obtains the adjacent area load value is: exchange load information by X2 interface between base station and adjacent base station; Described adjacent area comprises all neighbor cells around this residential quarter, and described X2 is a kind of base station of defining among the 3G (Third Generation) Moblie technical specification 3GPP of mechanism and the logic interfacing between the base station.
3. a kind of Automatic Neighboring Relation optimization method based on load in the long evolving system as claimed in claim 1 is characterized in that in stage one step 2) in, described base station side sends the concrete grammar that automatic configuring adjacent cell relation measures indication to user equipment side and is:
A. base station side sends the DRX order MAC Control Element informational message of MAC layer, comprises that in described message at least one field is used to refer to ANR and measures;
B. base station side sends the special-purpose control message of MAC layer, measures by described specific messages indication ANR;
C. base station side sends the control message of rrc layer, sends ANR by described rrc layer message indication MAC layer and measures indication.
4. a kind of Automatic Neighboring Relation optimization method based on load in the long evolving system as claimed in claim 1, it is characterized in that in stage one step 2) in, user equipment to report Reference Signal Received Power metrical information, subscriber equipment is by measuring RSRP in the coherent reference signal power that adds of the subframe of complete Measurement bandwidth, measuring process is filtering sampling, r nThe filter measurement result who upgrades, r N-1Old filter measurement result, q nBe the most recent measurements that terminal point is received, K is the filter coefficient that network provides, and filtering sampling is expressed as:
r n = { 1 - ( 1 2 ) k / 4 } × r n - 1 + ( 1 2 ) k / 4 × q n .
5. a kind of Automatic Neighboring Relation optimization method based on load in the long evolving system as claimed in claim 1, it is characterized in that in stage one step 3), the RSRP information that described residential quarter reports load value and the UE of adjacent area is upgraded the priority of Neighboring Cell List simultaneously as weights, Neighboring Cell List obtain the detected cells that is reported by UE, the adjacent area load value L that obtains with eNB LoadJointly as weights, Neighboring Cell List is carried out the further optimization of priority, then Neighboring Cell List L LinBe expressed as
L lin=αRSRP+βL load。
CN2013103194856A 2013-07-26 2013-07-26 Load-based automatic neighbor relation (ANR) optimizing method in long-term evolution system Pending CN103369572A (en)

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CN106304140A (en) * 2015-06-10 2017-01-04 中兴通讯股份有限公司 The method of cutting off rate, device and base station is reduced during performing ANR
US11039340B2 (en) 2016-03-04 2021-06-15 Telefonaktiebolaget Lm Ericsson (Publ) Inter-frequency load balancing
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CN109005574B (en) * 2018-07-28 2021-08-06 努比亚技术有限公司 Cell selection method, mobile terminal and computer readable storage medium
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