CN102404784B - A Method for Adjusting Mobility Parameters - Google Patents
A Method for Adjusting Mobility Parameters Download PDFInfo
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- CN102404784B CN102404784B CN201110371738.5A CN201110371738A CN102404784B CN 102404784 B CN102404784 B CN 102404784B CN 201110371738 A CN201110371738 A CN 201110371738A CN 102404784 B CN102404784 B CN 102404784B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005259 measurement Methods 0.000 claims abstract description 41
- 238000012508 change request Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 10
- 230000011664 signaling Effects 0.000 abstract description 5
- 230000000977 initiatory effect Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
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Abstract
The invention discloses a method for adjusting mobility parameters. The method is characterized in that judgment is performed according to different conditions when a customer switches over possibly, and measurement configuration is only performed when in necessary. The method comprises the steps as follows: determining that whether a switching delaying state is entered or not through a current cell according to a received mobility change request message sent an adjacent cell; and in the switching delaying state, judging whether the condition of switching to the adjacent cell is met or not through the current cell when a customer in the current cell reports the measurement and a switchable target cell in the measurement report includes the adjacent cell, if so, switching the customer to the adjacent cell, however, if not, judging that whether the number of reports in the measurement report configuration is set to be infinite or not, if so, performing no processing, and if not, reconfiguring the mobility parameters of the customer and recording the information of the customer. Therefore, a great amount of measurement configuration information is avoided, and air interface signaling is saved.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of method of adjusting mobility parameters.
Background technology
In following network, due to different network coexisted, it is more complicated that network will become, and a large amount of wireless parameters and data significantly improve ，Er operator by the workload that makes network optimization personnel and wish to cut operating costs and manual intervention.So under this background, EUTRAN (Evolved Universal Terrestrial Radio Access Network, the universal land radio access web of evolution) SON of system (Self-Organized Network, self-organizing network) characteristic is used as the important research direction of 3GPP.The main thought of SON is to realize some autonomic functions of wireless network, reduces manually and participates in, and cuts operating costs.The research contents of SON comprises ANR (Auto Neighbor Relation, automatically adjacent cell relation), PCI (physical district ID) selection, MRO (mobile robustness optimization) and MLB (moving load is balanced) etc.
The object of load balancing is the load of dispersing estate, or produces a part of business from congested community.By revising mobility parameters and handoff procedure, complete.By load balancing, can improve power system capacity, also can reduce the artificial participation aspect webmaster and network optimization.For example, when adjacent cell is congested, need to carry out adjacent cell to the load balancing of current area.
Suitable adjacent cell is selected by information on load in current area, by changing its switching and reselecting parameters, initiates load balancing.
For fear of a UE, switched to behind another community because signal reason is come by switchback very soon due to cell load, a new border should be consulted with adjacent cell in current area, by mobility negotiations process, realizes.Current area is initiated mobility to adjacent cell and is changed request, to adjacent cell, provides new mobility configuration and reason (as, the request that MLB is relevant).The change of asking is indicated in difference (delta) mode, with respect to the change amount of handover trigger parameter currency.Handover trigger is that community is specific, initiates to switch the thresholding of set-up procedure corresponding to community.Adjacent cell sends response to current area, this response can be considered in current area when carrying out its mobility parameters change.
In prior art, current area is all before UE reporting measurement reports, just to adjust mobility parameters for the change request of mobility parameters, for all connected state UE or edge UE in community reconfigure mobility parameters, so just cause a large amount of measurement configuration messages and measure reporting message, being unfavorable for saving space interface signaling.
Summary of the invention
The invention provides a kind of method of adjusting mobility parameters, when need to postponing switching, community for all users or edge customer, do not revise mobility parameters, only have when user has switching demand and just modify, avoided so a large amount of measurement configuration messages, saved space interface signaling.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of method of adjusting mobility parameters, the method comprises:
When current area receives mobility that adjacent cell sends and changes request message, determine whether that a mobility parameters of initiating based on load balancing changes process, and need to postpone and switch, if first do not change the mobility parameters adjustment information of carrying in request message according to described mobility, carry out the adjustment of mobility parameters, and enter switching delay state;
In switching delay state, if the measurement report that the UE in this community reports is received in current area, and in this measurement report, comprise described adjacent cell, current area calculates the new mobility parameters after adjustment according to described mobility parameters adjustment information, according to the new mobility parameters after adjusting, judges whether described UE meets the condition that is switched to adjacent cell;
If meet, switch;
If do not met, whether the number that reports configuring in the measurement report reporting according to described UE is infinite, is not process, otherwise is new mobility parameters according to the former mobility parameters of the UE described in the adjustment of described mobility parameters adjustment information.
From above-mentioned, a kind of method ，Dang community of adjusting mobility parameters provided by the invention need to be postponed while switching and for all users or edge customer, do not revised mobility parameters, only has when user has switching demand and just modifies.Avoid so a large amount of measurement configuration messages, saved space interface signaling.
Accompanying drawing explanation
Fig. 1 is that in the embodiment of the present invention, current area receives that mobility changes the process chart of request message;
Fig. 2 is that in the embodiment of the present invention, the process chart after measurement report is received at " switching delay state " in current area.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the drawings and specific embodiments, describe the present invention.
When load balancing, current area is a kind of transition condition for the modification of mobility parameters, when load balancing is finished in current area, also mobility parameters can be reverted to original value.Suppose to receive for twice that the time difference that mobility changes request is T, so T during this period of time in, if need to switch to current area without any UE, adjacent cell not needs to revise mobility parameters.And for receiving mobility, change the community of request, what need to do is to postpone its UE to the switching of certain community, in the time of therefore can waiting until UE reporting measurement reports completely, judges again, can effectively reduce mobility parameters like this and reshuffle.Wherein, mobility parameters is for judging the relevant parameter of all measurements that meets measuring condition.
Take A3 event as example, and wherein, mobility parameters is: cell frequency biasing, community individual character deviant, hysteresis, event offset amount.The adjustment of mobility parameters is one that adjusts in cell frequency biasing, community individual character deviant, hysteresis, event offset amount, or a plurality of combination in any.The individual character skew Ocn that adjusts community of take is example, suppose that adjacent cell wishes part UE to be switched to current area, and has increased to the individual character of current area and be offset.For fear of pingpang handoff, need current area to reduce to the individual character skew of adjacent cell.
When current area receives mobility that adjacent cell sends and changes request message, determine whether that a mobility parameters of initiating based on load balancing changes process, and need to postpone and switch, if first do not change the mobility parameters adjustment information of carrying in request message according to described mobility, carry out the adjustment of mobility parameters, and enter switching delay state.Wherein adjusting is also to reconfigure mobility parameters.
Specifically, when current area, receive the mobility that adjacent cell is sent and change request message, and it is " Load Balancing " that current area receives " Cause " value that mobility that adjacent cell sends changes in request message, when " eNB2 Proposed Mobility Parameters " is positive number, judge that this is that a mobility parameters of initiating based on load balancing changes process, and need to postpone the switching that the user in current area arrives adjacent cell, determine and enter switching delay state, current area is not temporarily carried out any mobility parameters and is reshuffled.
In switching delay state, if the measurement report that the UE in this community reports is received in current area, and comprise adjacent cell in this measurement report, current area calculates the new mobility parameters after adjustment according to described mobility parameters adjustment information, according to the new mobility parameters after adjusting, judges whether this UE meets the condition that is switched to adjacent cell.
That is to say, if comprise adjacent cell at this state when certain UE measures to give the correct time, represent that this UE likely switches to adjacent cell,, when the measured value of UE meets following formula, comprises described adjacent cell in current area reporting measurement reports and this measurement report;
Mn+Ofn+Ocn-Hys＞Ms+Ofs+Ocs+Off
Wherein, Mn represents Reference Signal Received Power RSRP or the Reference Signal Received Quality RSRQ of the adjacent cell that measures, Ofn represents adjacent cell frequency offset, Ocn represents adjacent cell individual character deviant, Hys represents hysteresis, and Ms represents RSRP or the RSRQ of the current area that measures, and Ofs represents the frequency offset of current area, Ocs represents current area biasing, Off presentation of events side-play amount.
Ocn ' is the new individual character deviant after the adjustment that calculates according to mobility parameters adjustment information of current area.
When the measured value in the measurement report that described UE reports meets following formula, determine and meet the condition that is switched to described adjacent cell.
Mn+Ofn+Ocn′-Hys＞Ms+Ofs+Ocs+Off
Because there is Ocn ' < Ocn, special processing need to be carried out to this measurement report in current area: use Ocn ' to judge, see and whether still meet this measurement event.
If meet, switch;
If do not met, whether the number that reports configuring in the measurement report reporting according to this UE is infinite, is not process, otherwise with the new mobility parameters after described adjustment, upgrades the former mobility parameters of described UE.
Concrete mobility parameters method of adjustment is: first according to mobility parameters adjustment information and former mobility parameters, calculate the mobility parameters making new advances, newer mobility parameters is configured to UE.
Specifically, as met the condition that is switched to adjacent cell, switch this user to adjacent cell; If do not met the condition that is switched to adjacent cell, judgement is measured and is reported whether the number setting that reports in configuration is " infinite "; As be " infinite ", disregard; If being not " infinite ", reconfigure this user's mobility parameters, namely Ocn is revised as to Ocn ', while avoiding UE to meet measuring condition, can not again trigger and report, and record described user's information, for recovering.
After the former mobility parameters of adjusting this UE according to mobility parameters adjustment information is new mobility parameters, the mobility parameters of namely adjusting this user be Ocn ' afterwards, when this user meets following formula, measure and report;
Mn+Ofn+Ocn′-Hys＞Ms+Ofs+Ocs+Off。
Under switching delay state, when current area receives that mobility that adjacent cell sends changes request message, exit switching delay state.That is, when current area is when " switching delay state ", if receive that mobility changes request message, indication need to be revised as Ocn from Ocn ', current area by recover and adjacent cell between Ocn, and exit " switching delay state " and enter normal condition.
Exit the UE that in the ，Jiang Zhe community, current area of switching state, mobility parameters is new mobility parameters and be adjusted into former mobility parameters.
That is to say, for adjusted mobility parameters at " switching delay state " but the user who does not also switch need to be revised as mobility parameters original value, after this, for measurement, report and no longer carry out special processing.
Fig. 1 is that in the embodiment of the present invention, current area receives that mobility changes the process chart of request message, as described in Figure 1, when current area receives that mobility changes request message, is handled as follows step:
101, receive that the mobility that adjacent cell is sent changes request message;
102, judge current whether in " switching delay state "; Entering in this way step 103, is not to enter step 104.
103, enter " normal condition ", for adjusted Ocn at " switching delay state " but the UE also not switching need to be revised as Ocn original value, after this, for measurement, report and no longer carry out special processing.
104, the former of judgement mobility request message reduces individual character deviant because of load balancing and requirement;
In this way 105, enter switching delay state;
As not no 106, process according to a conventional method.
Fig. 2 is that in the embodiment of the present invention, the process chart after measurement report is received at " switching delay state " in current area, and as shown in Figure 2, under " switching delay state ", current area is received after measurement report, is handled as follows step:
201, receive measurement report;
202, according to measurement report and new mobility parameters, judge whether to meet A3 handover event; As meet A3 handover event and enter step 203, otherwise enter step 204;
203, trigger and switch;
204, judgement reports whether number of times is " infinite "; As judgement reports number of times, be " infinite ", enter step 205, otherwise enter step 206.
205, finish this program, this user is disregarded;
206, the mobility parameters that reconfigures this user is Ocn ', and records this user's information.
In sum, the invention discloses a kind of method of adjusting mobility parameters, the method is according to different situations, to judge when user has switching possibility, only just measures when being necessary configuration.By current area basis, receive the mobility change request message that adjacent cell is sent, determine whether to enter switching delay state; Under switching delay state, certain the user's measurement in current area report and measurement report in switchable Target cell while comprising adjacent cell, current area judges whether to meet the condition that is switched to adjacent cell; As met, switch this user to adjacent cell; Otherwise judgement is measured and is reported whether the number setting that reports in configuration is " infinite "; As be " infinite ", disregard; If being not " infinite ", reconfigure this user's mobility parameters, and record this user's information, avoided so a large amount of measurement configuration messages, save space interface signaling.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (8)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2988551B1 (en) * | 2013-05-10 | 2017-10-11 | Huawei Technologies Co., Ltd. | Signal transmission method and device |
| CN105682156B (en) * | 2015-12-11 | 2018-11-02 | 华信咨询设计研究院有限公司 | The adaptive LTE cell switching methods of Gaussian Profile based on load |
| CN108882306B (en) | 2017-05-11 | 2023-04-28 | 上海中兴软件有限责任公司 | Mobility parameter adjusting method and device |
| WO2020077517A1 (en) | 2018-10-16 | 2020-04-23 | 华为技术有限公司 | Cell switching method and device under high-speed mobile context |
| US11330654B2 (en) * | 2019-10-22 | 2022-05-10 | Mediatek Inc. | Methods for performing mobility procedure in NSA mode and communications apparatus utilizing the same |
| WO2022229258A1 (en) * | 2021-04-30 | 2022-11-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods for mobility setting adjustment based on predictions |
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| CN101931987A (en) * | 2009-06-25 | 2010-12-29 | 大唐移动通信设备有限公司 | Base station switching method, device and system |
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| US7657268B2 (en) * | 2006-03-29 | 2010-02-02 | Cisco Technology, Inc. | Predicting movement of a mobile node from a current access location to next access locations |
| US9271204B2 (en) * | 2008-11-17 | 2016-02-23 | Qualcomm Incorporated | Mobility management based on radio link failure reporting |
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| CN101686487A (en) * | 2008-09-22 | 2010-03-31 | 华为技术有限公司 | Measurement report reporting and target cell information sending method, mobile terminal and base station |
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