CN101984711B - A kind of method and wireless communication terminal controlling cell reselection - Google Patents
A kind of method and wireless communication terminal controlling cell reselection Download PDFInfo
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- CN101984711B CN101984711B CN201010546489.4A CN201010546489A CN101984711B CN 101984711 B CN101984711 B CN 101984711B CN 201010546489 A CN201010546489 A CN 201010546489A CN 101984711 B CN101984711 B CN 101984711B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/00837—Determination of triggering parameters for hand-off
- H04W36/008375—Determination of triggering parameters for hand-off based on historical data
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention proposes a kind of method and the wireless communication terminal that control cell reselection; control the method for cell reselection; the number of times of being stationed by community in record unit time judges whether frequent gravity treatment occurs; if there is frequent gravity treatment, start frequent gravity treatment Preservation tactics; second priority community is recorded to and forbids re-selecting cell list, thus make terminal quarter at the higher or metastable community of signal level of service quality as far as possible.Have employed the method for above-mentioned control cell reselection, avoid mobile terminal because Target cell is prohibited or not can be accessed by and go decoding BCCH information, reduce standby energy consumption, improve the operational efficiency of protocol stack, simultaneously according to wireless environment dynamic conditioning reselecting parameters, avoiding the frequent gravity treatment problem because of occurring during Cell level frequent fluctuation, improve radio communication service quality and Consumer's Experience.
Description
Technical field
The present invention relates to moving communicating field, more specifically, relate to a kind of method and the wireless communication terminal that control cell reselection.
Background technology
Along with the development of mobile communication technology, main flow mobile communication network mostly carries out the omnibearing network coverage with the form of honeycomb, and specify according to 3GPP specification TS23.122, when first terminal can select registered public land wireless network (Registered Public Land MobileNetwork after power-up, RPLMN), RPLMN is the network of terminal last successful registration, if when not having RPLMN or RPLMN unavailable in mobile phone, terminal can find an available public land wireless network (Public Land Mobile Network according to the order specified, PLMN), after finding PLMN, terminal can initiate cell selection procedure, once terminal is chosen, the community of " suitable " is resident gets off, terminal will produce a candidate list, this list comprises the information by the community selected and neighbor cell, this information can obtain from the SIB11 message of persistent district.When mobile terminal select certain community as current Serving cell after, when Cell level signal intensity is little, mobile terminal is by a selected cell resident, after this, continue and high-quality service for ensureing to obtain, mobile device can be measured current residing network environment, comprise current service cell and the surrounding neighbours community of mobile device, and meeting under measurement parameter controlled condition, mobile device by gravity treatment to service quality or the better community of signal strength signal intensity.
Such as in GSM/WCDMA system, mobile device can by the various system messages of the broadcast of decoding BCCH (Broadcast Control Channel) channel periodicity, wherein just contain the required adjacent cell frequency configuration of cell reselection, mobile terminal can be monitored the adjacent cell frequency bcch carrier of configuration, by 6 bcch carrier information the strongest of decoding, obtain the parameter of current area gravity treatment, and in constantly measurement and decode procedure, if when finding that adjacent cell meets the condition of cell reselection, mobile device will initiate cell reselection process.
If according to this way, when mobile device is current, to be in level fluctuation frequent, when disturbing larger environment, Serving cell level fluctuation is larger, be present in that adjacent cell in monitoring collection is inevitable constantly carry out change adjustment, such as, monitor collection community number, native region priority order etc., so the thing followed is the measurement operation of community to change, simultaneous operation and decoding BCCH channel etc. operate and then can greatly strengthen, also greatly can increase the energy consumption of mobile device simultaneously, reduce stand-by time.
Secondly this way does not consider other the condition in cell reselection process, such as measure community whether to can be accessed by, measure community and whether belong to affiliated PLMN, if the Target cell of gravity treatment is arranged by operator forbid that access (or this location area cell forbids access) or this community do not belong to its home network, when terminal constantly attempts access, along with all needing to carry out cell selection procedure at every turn, carry out the operation such as frame synchronization, decoding BCCH broadcast message, synchronous decoding operation must bring larger energy ezpenditure continually; Existing implementation method faces measurement quality judge single (be Ec/No, or be RSCP), lag parameter (network side issues) inflexible problem simultaneously.
Summary of the invention
The object of the invention is to overcome shortcoming of the prior art, a kind of method and the terminal that more effectively can carry out cell reselection operation are provided, better Consumer's Experience are provided, and reduce cell reselection energy consumption.
For achieving the above object; the present invention proposes a kind of method controlling cell reselection; the number of times of being stationed by community in record unit time judges whether frequent gravity treatment occurs; if there is frequent gravity treatment, start frequent gravity treatment Preservation tactics; second priority community is recorded to and forbids re-selecting cell list, thus make terminal quarter at the higher or metastable community of signal level of service quality as far as possible.
Further, the frequent gravity treatment Preservation tactics of described startup comprises increase reselection hysteresis parameter.
Further, described just second priority community is recorded to forbids that re-selecting cell list comprises: re-selecting cell list is forbidden in the adjacent cell immigration of being stationed number of times maximum, and reorders to adjacent cell list.
Further, describedly to carry out according to Ec/No or RSCP or RSSI the adjacent cell list rule that reorders, increase priority factors Pr for 3G community, the computational methods of priority factors Pr are as follows:
Pr＝k+1/(|Ec/No*RSCP|)
K is constant, is defaulted as 1.
Further, also comprised before judging whether that frequent gravity treatment occurs: read configuration information, and re-selecting cell list and successful reselection cell list are forbidden in initialization; Described configuration information comprises gravity treatment granularity threshold values.
Further, also comprised before the frequent gravity treatment Preservation tactics of startup:
Judge whether re-selecting cell is forbidding re-selecting cell list;
If re-selecting cell list is not being forbidden in re-selecting cell, selecting and then judging that whether Target cell is at successful reselection cell list further;
If Target cell is not at successful reselection cell list, then judge whether the gravity treatment granularity thresholds of this community is greater than preset value further, if be greater than, start frequent gravity treatment Preservation tactics.
The present invention also proposes a kind of wireless communication terminal, and described wireless communication terminal comprises: measurement module, adaptation module and judging module, wherein,
Described measurement module is measured adjacent cell, obtains the network parameter of adjacent cell, and sorts to measurement community according to measurement result;
The measurement parameter that described adaptation module collection network side issues, and according to the state dynamic conditioning measurement parameter of terminal;
Described judging module performs cell reselection process according to agreement.
Further; perform cell reselection process according to agreement to comprise: if there is frequent gravity treatment, start frequent gravity treatment Preservation tactics; second priority community is recorded to and forbids re-selecting cell list, thus make terminal quarter at the higher or metastable community of signal level of service quality as far as possible.
Further, described network parameter comprise following one or more: Ec/Io or the RSCP parameter of FDD or TDD cell, the RSSI parameter of GSM community.
Further, describedly according to measurement result, measurement community is carried out sequence and comprised: the sequence of adjacent cell is sorted according to Ec/Io or RSCP for FDD or TDD cell according to 3GPP agreement TS25.304, carries out ranking cells for GSM community according to RSSI.
To sum up, adopt technical scheme of the present invention, the mobile terminal records access information of neighbor cell, make mobile terminal can just know whether Target cell belongs to before initiation cell reselection can access, avoid mobile terminal because Target cell is prohibited or not can be accessed by and go decoding BCCH information, reduce standby energy consumption, improve the operational efficiency of protocol stack, simultaneously according to wireless environment dynamic conditioning reselecting parameters, avoiding the frequent gravity treatment problem because of occurring during Cell level frequent fluctuation, improve radio communication service quality and Consumer's Experience.
Accompanying drawing explanation
Fig. 1 forbids re-selecting cell list structure in the embodiment of the present invention;
Fig. 2 is successful reselection cell list structure in the embodiment of the present invention;
Fig. 3 is the terminal module schematic diagram that the embodiment of the present invention controls cell reselection;
Fig. 4 is that the embodiment of the present invention controls residence reselecting schematic flow sheet;
To be that embodiment of the present invention intermediate frequency is heavy select Preservation tactics step schematic diagram to Fig. 5.
Embodiment
This enforcement provides a kind of method and the terminal that control cell reselection; the number of times of being stationed by community in record unit time judges whether frequent gravity treatment occurs; if there is frequent gravity treatment, start frequent gravity treatment Preservation tactics; suitable adjustment reselection hysteresis parameter; and be recorded to second priority community and forbid re-selecting cell list, thus make terminal quarter at the higher or metastable community of signal level of service quality as far as possible.
Below in conjunction with the drawings and specific embodiments, realization of the present invention is described in detail.
The invention provides a kind of terminal and the method that control cell reselection, according to network environment dynamic conditioning reselecting parameters, can effectively avoid frequent gravity treatment by the information of end side recording cell gravity treatment.
As shown in Figure 1, for forbidding re-selecting cell list structure in the embodiment of the present invention:
Field S101 is subzone main scramble.
Field S102 is PLMN belonging to community.
Field S103 is frequency belonging to community.
Field S104 is groups of frequency bands belonging to community.
Field S105 is belonging positions district, community mark.
Field S106 is that community forbids accessing reason.
Field S107 is Last modification timestamp.
As shown in Figure 2, be successful reselection cell list structure in the embodiment of the present invention:
Field S201 is subzone main scramble.
Field S202 is PLMN belonging to community.
Field S203 is frequency belonging to community.
Field S204 is groups of frequency bands belonging to community.
Field S205 is belonging positions district, community mark.
Field S206 is that cell reselection is stationed counting.
Field S207 is Last modification timestamp.
As shown in Figure 3, be the terminal module schematic diagram that the embodiment of the present invention controls cell reselection, this terminal described comprises: measurement module, adaptation module, judging module.
Described measurement module is responsible for the adjacent cell initiated monitoring is concentrated and is measured, and obtains the network parameter of adjacent cell, and sorts to measurement community according to measurement result.Described network parameter comprises Ec/Io or the RSCP parameter of FDD or TDD cell, the RSSI parameter of GSM community.
After obtaining the measurement result of adjacent cell, the sequence of adjacent cell can be sorted according to Ec/Io or RSCP for FDD or TDD cell according to 3GPP agreement TS25.304, can carry out ranking cells for GSM community according to RSSI.
Described adaptation module is responsible for the measurement parameter that collection network side issues, and according to the state dynamic conditioning measurement parameter of terminal, such as, should avoid frequent gravity treatment as far as possible.
Described judging module is responsible for performing cell reselection process according to agreement.When the frequent gravity treatment Preservation tactics of startup, second priority community is recorded to and forbids re-selecting cell list, thus make terminal quarter at the higher or metastable community of signal level of service quality as far as possible.
As shown in Figure 4, be that the embodiment of the present invention controls residence reselecting schematic flow sheet, comprise following several step:
Step S401: mobile terminal starts start, read EFS file or NV configuration information, re-selecting cell list and successful reselection cell list are forbidden in initialization;
Configuration information comprises gravity treatment granularity threshold values N, time interval T, reselection frequency N, and sluggishness increases progressively parameter RSTEP, and high-quality cell signal strength threshold values PREF_SELECTION_THRESHOLD.Empty and forbid re-selecting cell list and the list of gravity treatment successful cell.
Step S402: mobile terminal carries out proper network registration, PLMN selection, community selection, location updating, routing update operation;
Step S403: adjacent cell is measured, and according to network side configuration, adjacent cell is sorted;
The sequence of adjacent cell can be sorted according to Ec/Io or RSCP for FDD or TDD cell according to 3GPP agreement TS25.304, can carry out ranking cells for GSM community according to RSSI.When 2G and 3G being coexisted simultaneously, this enforcement is always considered with 3G community for priority cell, namely sort and priority factors Pr is added for 3G community, and not only consider cell signal or disturbed condition, can prevent terminal gravity treatment under 3G covers continuous print situation from, to 2G network, effectively can improve Consumer's Experience like this.
Step S404: judge whether re-selecting cell is forbidding re-selecting cell list;
Carrying out gravity treatment, judge whether re-selecting cell is forbidding re-selecting cell list, if forbidding re-selecting cell list, stop reselection operation, performing step S411; Otherwise perform step S405;
Step S405: judge that whether Target cell is at successful reselection cell list, if, enter step S406, otherwise perform step S407;
Step S406: check whether the gravity treatment granularity thresholds of this community is greater than preset value, if be greater than, then performs step S407, otherwise procedure performance step S408 is stationed in continuation gravity treatment;
Step S407: start gravity treatment Preservation tactics;
If enable frequent cell reselection Preservation tactics; then according to network state dynamic conditioning self adaptation reselecting parameters Qhyst1s or Qhyst2s; increase progressively RSTEP at every turn; increase reselection hysteresis; adjacent cell is resequenced; make UE remain on the community that current service quality is higher or signal level is more stable as far as possible, adding the secondary low neighbor cell of reselection frequency to forbidding re-selecting cell list simultaneously, preventing terminal frequently to the gravity treatment of second priority level.
Step S408: be normally stationed;
Step S409: whether inspection is stationed successful, if be stationed successfully, performs step S410; Otherwise row step S411.
Step S410: record this community to successful reselection cell list, recording cell information comprises main scrambler, frequency, Time To Station, and add 1 to being stationed number of times, then perform step S412;
Record gravity treatment successful cell information, comprises Time To Station, frequency point information, community ID, scrambling code information etc., and is stationed number of times and adds one; Gravity treatment unsuccessfully needs to check this community whether by bar or forbid access, whether national code is consistent with belonging network with network code, community be prohibited or network code inconsistent, add this community to forbidding re-selecting cell list, with prevent next time continue to this community initiate gravity treatment.
Step S411: be stationed unsuccessfully, then check that whether this community is retained by operator or whether community forbids that whether the national code network code accessing (have in system message and issue) and this community is identical with network code with SIM/USIM Chinese Home code, different Ze Jianggai community joins forbids re-selecting cell list, then can not initiate gravity treatment to this community next time;
Step S412: terminate.
Described configuration information: gravity treatment granularity refers to the times N of gravity treatment within unit interval T, time interval T, reselection frequency N; Auto-adaptive parameter RSTEP is a regulating parameter, is used for dynamic adjustments lag parameter, and these parameters are all kept in terminal Nonvolatile memory (NV) or EFS file, and can arrange or regulate.
The calculating of neighbor cell list priority, can sort according to Ec/Io or RSCP for FDD or TDD cell according to 3GPP agreement TS25.304, can carry out ranking cells for GSM community according to RSSI.
Target cell to refer in neighbor cell list and the R value (priority) calculated higher than the community of current service cell.
Parameter Qhyst1s or Qhyst2s is issued by network side, for the return difference value of cell reselection, adopts during Qhyst1s, CPICH EC/NO adopt Qhyst2s when cell reselection setup measures is CPICH RSCP.Sluggishness increases progressively parameter RSTEP and is kept in end side EFS file or Nonvolatile memory the incremental change being used for adjusting return difference value.
As shown in Figure 5, being that embodiment of the present invention intermediate frequency is heavy selects Preservation tactics step schematic diagram, mainly comprises the following steps:
Step S501: increase reselection hysteresis parameter, step increases RSTEP.
Reselection hysteresis parameter is the parameter being handed down to terminal by network side, it is a regulating parameter that step increases RSTEP parameter, be used for dynamic adjustments lag parameter, be kept in terminal Nonvolatile memory (NV) or EFS file, and empirical value or dynamic adjustments can be set to.Reselection hysteresis parameter is that terminal does cell reselection when sorting to neighbor cell, for the deviate that current service cell signal quality increases, neighbor cell deducts an identical deviate, object is the signal quality in order to suitably pull open current area and neighbor cell, thus can not by gravity treatment when neighbor cell level is in rational change range, effectively can suppress ping-pong like this, avoid frequent gravity treatment.
Step S502: re-selecting cell list is forbidden in the adjacent cell immigration of being stationed number of times maximum, and adjacent cell list is reordered;
Ordering rule is according to Ec/No or RSCP or RSSI, and increase priority factors Pr for 3G community, the computational methods of priority factors Pr are as follows simultaneously:
Pr＝k+1/(|Ec/No*RSCP|)
K is constant, is defaulted as 1, and when the product of Ec/No and RSCP is less, Pr is larger, and the preferred number of this community is higher.Namely signal strength signal intensity and signal quality better, then its absolute value is less, and product is less, and Ze Gai community is more preferential, also more likely gravity treatment Dao Gai 3G community.Such object is to make dual-mode terminal remain on 3G community as far as possible, even if UE also can be kept in 3G community when 2G signal is better than 3G signal as far as possible, improves Consumer's Experience.
Step S503: perform cell reselection and be stationed process.
The object of the invention is to overcome shortcoming of the prior art, a kind of method and the terminal that more effectively can carry out cell reselection operation are provided, better Consumer's Experience are provided, and reduce cell reselection energy consumption.
To sum up, have employed the method for above-mentioned control cell reselection, the mobile terminal records access information of neighbor cell, make mobile terminal can just know whether Target cell belongs to before initiation cell reselection can access, avoid mobile terminal because Target cell is prohibited or not can be accessed by and go decoding BCCH information, reduce standby energy consumption, improve the operational efficiency of protocol stack, simultaneously according to wireless environment dynamic conditioning reselecting parameters, avoid the frequent gravity treatment problem because of occurring during Cell level frequent fluctuation, improve radio communication service quality and Consumer's Experience.
Certainly; the present invention also can have numerous embodiments; do not deviating from the situation of the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change or change according to the present invention; in every case done within the spirit and principles in the present invention any amendment, equivalent replacement, improvement, all should be included within protection scope of the present invention.
Claims (7)
1. one kind controls the method for cell reselection, it is characterized in that, the number of times of being stationed by community in record unit time judges whether frequent gravity treatment occurs, if there is frequent gravity treatment, start frequent gravity treatment Preservation tactics, second priority community is recorded to and forbids re-selecting cell list, thus make terminal quarter at the higher or metastable community of signal level of service quality as far as possible; Wherein,
Also comprised before the frequent gravity treatment Preservation tactics of startup:
Judge whether re-selecting cell is forbidding re-selecting cell list;
If re-selecting cell list is not being forbidden in re-selecting cell, then judging that whether Target cell is at successful reselection cell list further;
If Target cell is not at successful reselection cell list, then judge whether the gravity treatment granularity thresholds of Target cell is greater than preset value further, if be greater than, start frequent gravity treatment Preservation tactics;
Described being recorded to second priority community forbids that re-selecting cell list comprises: re-selecting cell list is forbidden in the adjacent cell immigration of being stationed number of times maximum, and reorders to adjacent cell list.
2. method according to claim 1, is characterized in that, the frequent gravity treatment Preservation tactics of described startup comprises increase reselection hysteresis parameter.
3. method according to claim 1, is characterized in that, describedly carries out according to Ec/No or RSCP or RSSI the adjacent cell list rule that reorders, and increase priority factors Pr for 3G community, the computational methods of priority factors Pr are as follows:
Pr＝k+1/(|Ec/No*RSCP|)
K is constant, is defaulted as 1.
4. method according to claim 1, is characterized in that, also comprises before judging whether that frequent gravity treatment occurs: read configuration information, and re-selecting cell list and successful reselection cell list are forbidden in initialization; Described configuration information comprises described gravity treatment granularity threshold values.
5. a wireless communication terminal, is characterized in that, described wireless communication terminal comprises: measurement module, adaptation module and judging module, wherein,
Described measurement module is measured adjacent cell, obtains the network parameter of adjacent cell, and sorts to measurement community according to measurement result;
The measurement parameter that described adaptation module collection network side issues, and according to the state dynamic conditioning measurement parameter of terminal;
Described judging module performs cell reselection process according to agreement;
Described according to agreement perform cell reselection process comprise:
Judge whether re-selecting cell is forbidding re-selecting cell list;
If re-selecting cell list is not being forbidden in re-selecting cell, then judging that whether Target cell is at successful reselection cell list further;
If Target cell is not at successful reselection cell list, then judge whether the gravity treatment granularity thresholds of Target cell is greater than preset value further, if be greater than, start frequent gravity treatment Preservation tactics, second priority community is recorded to and forbids re-selecting cell list, thus make terminal quarter at the higher or metastable community of signal level of service quality as far as possible;
Described being recorded to second priority community forbids that re-selecting cell list comprises: re-selecting cell list is forbidden in the adjacent cell immigration of being stationed number of times maximum, and reorders to adjacent cell list.
6. terminal as claimed in claim 5, is characterized in that, described network parameter comprise following one or more: Ec/Io or the RSCP parameter of FDD or TDD cell, the RSSI parameter of GSM community.
7. terminal as claimed in claim 5, it is characterized in that, describedly according to measurement result, measurement community is carried out sequence and comprised: the sequence of adjacent cell is sorted according to Ec/Io or RSCP for FDD or TDD cell according to 3GPP agreement TS25.304, carries out ranking cells for GSM community according to RSSI.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010546489.4A CN101984711B (en) | 2010-11-16 | 2010-11-16 | A kind of method and wireless communication terminal controlling cell reselection |
| PCT/CN2011/080425 WO2012065482A2 (en) | 2010-11-16 | 2011-09-30 | Method and wireless communication terminal for controlling cell re-selection |
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| CN201010546489.4A CN101984711B (en) | 2010-11-16 | 2010-11-16 | A kind of method and wireless communication terminal controlling cell reselection |
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| CN101984711B (en) * | 2010-11-16 | 2015-08-26 | 中兴通讯股份有限公司 | A kind of method and wireless communication terminal controlling cell reselection |
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| CN102685838A (en) * | 2012-05-25 | 2012-09-19 | 华为终端有限公司 | Cell reselection method and mobile terminal |
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| CN104519510B (en) * | 2013-09-30 | 2018-02-23 | 中国移动通信集团北京有限公司 | A kind of optimization method and device of cell reselection parameters |
| CN105208609B (en) * | 2014-06-27 | 2019-01-29 | 展讯通信（上海）有限公司 | Residence reselecting and device |
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| CN107211327B (en) * | 2015-12-24 | 2020-12-15 | 华为技术有限公司 | Method for controlling cell reselection and user terminal |
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| CN101984711A (en) | 2011-03-09 |
| WO2012065482A2 (en) | 2012-05-24 |
| WO2012065482A3 (en) | 2012-11-01 |
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