CN104168614A - High-speed railway LTE system cell reselection system and method based on geographical location information - Google Patents
High-speed railway LTE system cell reselection system and method based on geographical location information Download PDFInfo
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- CN104168614A CN104168614A CN201410441103.1A CN201410441103A CN104168614A CN 104168614 A CN104168614 A CN 104168614A CN 201410441103 A CN201410441103 A CN 201410441103A CN 104168614 A CN104168614 A CN 104168614A
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Abstract
The invention provides a high-speed railway LTE system cell reselection system and method based on geographical location information and relates to the technical field of mobile communication. The system comprises a base station arranged along a running track of a train and a vehicle-mounted device installed on the train, wherein a base station device comprises a receiving unit, a base station storage unit and a triggering judgment unit, and the vehicle-mounted device comprises a measurement unit, a sending unit, a vehicle-mounted storage unit and a control unit. According to the cell reselection method, a speed measurement result, lower than a preset threshold value, reported by the vehicle-mounted device is received on a source base station, a cell reselection process follows an R criterion, and if the speed measurement result is higher than the preset threshold value and the longitude and latitude information is consistent with data stored by the base station storage unit, the cell geographical location reselection process is started at the moment. On a high-speed moving scene, UE can fast reselect a reasonable target cell, and meanwhile it can be prevented that because of over-high running speed of a train, users can not surf the Internet.
Description
Technical field
The present invention relates to mobile communication technology field, be specifically related to a kind of high-speed railway communication system cell gravity treatment system and utilize the residence reselecting of this system.
Background technology
As UE(User Equipment, be called for short UE, i.e. user terminal) in idle condition, after community is selected, it need to carry out cell reselection constantly, to reside in the higher or better community of channel quality of priority.Network, by the priority of different frequent points is set, can reaches and control the resident object of UE.Meanwhile, UE will select top-quality community at certain frequency, so that better for it provides service.Cell reselection be mainly to solve wireless coverage problem.
Under idle pulley, the monitoring by Serving cell and measurements of neighboring cells value, carrys out triggering cell gravity treatment.The core content of gravity treatment trigger condition is: have than better community, Serving cell, and better community all keeps best within a period of time.UE tries one's best gravity treatment to better community so on the one hand, has guaranteed again on the other hand certain stability, avoids gravity treatment frequently.
For high-speed railway, generally adopt identical networking, its cell re-selection procedure is followed R criterion, that is:
Wherein
the RSRP value of measuring community,
defined the deviant of Target cell.
The object of cell reselection can be adjacent cell list Zhong community, can be also the community detecting in reuse adoption process.In queuing and selection course, need to meet following constraints:
1, new cell quality is not shorter than than the measured duration of current area matter in sequence
;
If 2 UE in non-common mobile status, need to consider parameter
with
carry out convergent-divergent;
3, the resident former community time of UE surpasses 1s.
Because the penetration loss of high ferro train is large, less for meeting coverage goal list RRU coverage, during train high-speed mobile, will pass through at short notice the coverage of a plurality of RRU, cause cell reselection frequently.If the in the situation that of merging in Wu Duo RRU community, suppose that train moves with 300km/h, train will carry out a minizone gravity treatment in every about 12 seconds, and cell reselection will greatly reduce the performance of network frequently.
High ferro adopts community folding more at present, by becoming cooperation in station between part RRU, has effectively reduced cell reselection number of times, has improved network performance.In actual enforcement, generally each physical site is configured to two two passage RRU, connecting respectively high-gain dual-channel antenna covers, between a plurality of physical site, carry out community merging, typical cell combining capabilities is that every three physical site (6 binary channels RRU) are merged into a logic district.Now cell coverage area can reach 3 kilometers, and about 30 ~ 40s carries out cell reselection one time, has reduced cell reselection number of times.Part producer equipment can be supported 12 GeRRUGong communities.
Because railway line strip distributes, so the distribution of base station is different from the plane covering feature of general cellular communication, generally can pass through high ferro base station distribution situation along the line, and the train operation circuit in earlier stage obtaining, the position of train, train passes through the time of community etc. information, the equipment performance of these useful informations and base station side is mutually combined, just can improve by rational design the performance of system, and can contribute to reduce the complexity of some algorithms, thereby obtain than general cellular communication higher spectrum efficiency and transmission quality under equal conditions, improve the flatness of cell reselection.
High ferro LTE adopts private network form construction substantially at present, so base station has continuity and succession, adjacent cell relation is fixed.In addition, more than high ferro speed per hour can reach 300km/h.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of high-speed railway LTE system cell gravity treatment system based on geographical location information, to simplify cell re-selection procedure, reduces the quantity that UE measures.
The present invention has also proposed to utilize the residence reselecting of this system simultaneously.
System of the present invention comprises that the base station of setting up along train operation track and the mobile unit of installing ON TRAINS form;
Base station equipment provided by the invention comprises receiving element, base station stored unit and judgement trigger element;
Receiving element, the train running speed information and the geographical location information that for receiving mobile unit, report, also can receive the signal quality information of car-mounted terminal simultaneously;
Base station stored unit, for storing the geographical location information of predefined speed decision threshold and high ferro cell reselection band along the line;
Judgement trigger element, for the information that obtains according to described receiving element and the pre-stored information of memory cell, compare, if train running speed is higher than predefined threshold value, and both latitude and longitude information are also consistent, start the cell reselection procedures based on geographical location information;
Mobile unit comprises measuring unit, transmitting element, vehicle-mounted memory cell and control unit, wherein;
Measuring unit, for measuring the speed of service and the geographical location information of train, the signal strength signal intensity that simultaneously can send base station side is measured;
Transmitting element, for when train running speed meets report condition, reports the geographical location information of train;
Control unit, for the control information receiving from base station, and carries out reselection operation;
Vehicle-mounted memory cell, for storing the positional information of adjacent base station.
Residence reselecting provided by the invention, comprising:
After subway base station construction along the line completes, according to concrete base station position information and train operation track, by simulation software, generate a Neighboring Cell List, and according to simulation result, obtain the positional information of each gravity treatment band, be i.e. longitude and latitude positional information;
By aforementionedly obtaining neighbor cell list, latitude and longitude information is pre-stored in corresponding base station memory cell;
The measuring unit of mobile unit is measured the latitude and longitude information in train running speed and train operation, and reports source base station; Control unit, by the cell shielding in train operation rear, only reports that adjacent cell only comprises unique adjacent cell frequency point information, i.e. train operation ahead community in source cell base station;
Source base station receives mobile unit report speed measurement result lower than the threshold value setting in advance, and cell re-selection procedure is followed R criterion, that is:
Wherein
the RSRP value of measuring community,
defined the deviant of Target cell;
Source base station receives mobile unit report speed measurement result higher than the threshold value setting in advance, and the data consistent of latitude and longitude information and the storage of base station stored unit, so now starts geographical position, community reuse adoption process;
The method of geographical position, community reuse adoption process is as follows:
When train enters the gravity treatment band of neighbor cell, start to measure the reference signal power (RSRP) of source cell base station and target cell base station, and report source cell base station together with speed now of train, positional information, the metrical information that source cell base station reports according to mobile unit, extract cell-of-origin that train receives and the reference signal power value (RSRP) of Target cell, and calculate train for the reference power difference of Target cell reference power and cell-of-origin;
Cell re-selection procedure is followed R criterion, that is:
Wherein
the RSRP value of measuring community,
defined the deviant of Target cell;
When the signal quality of Target cell is during higher than the signal quality of cell-of-origin, while meeting R criterion, just carry out cell reselection, and this position is the candidate point of best gravity treatment reference point;
Pass through each time the overlapping cover tape of gravity treatment, train all can access satisfactory best gravity treatment reference point candidate point along the line according to said method, and system log (SYSLOG) Train is through the positional information of all points that meet the demands in the process of these gravity treatment bands;
For accurate gravity treatment information definite along the line, need to adopt and repeatedly measure the method for analyzing, account form is as follows:
Because rail track is one dimension variable, therefore can set initial interchange of position coordinate, be 0, on railway, arbitrarily position coordinates is x, x ∈ [0, S] wherein, S is railway overall length;
Train once passes through the overlapping cover tape of gravity treatment, and can determine best gravity treatment reference point candidate point is discrete function (x
1, x
2, x
3x
n), train repeatedly repeats to pass through from the overlapping cover tape of gravity treatment, can obtain multi-group data (x
11, x
12, x
13x
1a) (x
21, x
22, x
23x
2b) ... (x
n1, x
n2, x
n3x
nm);
By data are carried out to statistical analysis, each gravity treatment band all has a best gravity treatment reference point x who calculates
a, x
b, x
cx
n, the position of recording these best gravity treatment reference points, filters out the reference point differing greatly with mean value, again remaining reference point measured value is averaged afterwards, using this position coordinates as optimal reference point, the 5-15% that the reference point wherein filtering out is whole reference points, measures number of times and is no less than 50.
Cell reselection algorithm provided by the invention and relevant device, under high-speed mobile scene, UE gravity treatment fast, to rational Target cell, to simplify cell re-selection procedure, reduces the quantity that UE measures.Meanwhile, this method also can prevent because train running speed is fast, and UE gravity treatment not in time, may cause user's off-grid phenomenon.For owing to there is no timely gravity treatment success, as produced during this period call, likely also can produce switching not in time and the call drop phenomenon of generation, also can reduce to greatest extent.
Accompanying drawing explanation:
Fig. 1 is high ferro scene LTE cell reselection schematic diagram;
Fig. 2 is base station equipment block diagram;
Fig. 3 is mobile unit block diagram;
Fig. 4 is the quick reselection algorithm flow chart of the LTE based on geographical location information;
Fig. 5 is best gravity treatment reference point choosing method flow chart;
Embodiment:
Below in conjunction with accompanying drawing, the present invention is described in detail.
Fig. 1 is high ferro scene LTE cell reselection schematic diagram in the present invention, according to the wire of high-speed railway, distribute, the mobile communications network of line of high-speed railway adopts chain dedicated cell to cover, in order to reduce the number of times of gravity treatment, adopt the deployment way of Base Band Unit+distributed Remote Radio Unit of BBU+RRU.Be generally 3 physical site communities altogether, therefore generally every three physical site, will carry out cell reselection process one time.According to the distribution form of high-speed railway, and vehicle heading, in high ferro, signal need carry out repeatedly cell reselection.
As shown in Figure 2, the base station equipment 1 that the embodiment of the present invention provides, comprising:
Receiving element 3, reports train running speed information and geographical location information for receiving mobile unit, also can receive the signal quality information of car-mounted terminal simultaneously;
Base station stored unit 4, for storing the geographical location information of predefined speed decision threshold and high ferro cell reselection band along the line;
Judgement trigger element 5, for the information that obtains according to described receiving element and the pre-stored information of memory cell, compare, if train running speed is higher than predefined threshold value, and both latitude and longitude information are also consistent, start the cell reselection procedures based on geographical location information.
Accordingly, the present invention also provides a kind of mobile unit 2, as shown in Figure 3, comprises measuring unit 6, transmitting element 7, vehicle-mounted memory cell 9 and control unit 8, wherein:
Measuring unit 6, for measuring the speed of service and the geographical location information of train, the signal strength signal intensity that simultaneously also can send base station side is measured;
Transmitting element 7, for when train running speed meets report condition, reports the geographical location information of train;
Control unit 8, for the control information receiving from base station, and carries out reselection operation.
Vehicle-mounted memory cell 9, for storing the positional information of adjacent base station.
Wherein, transmitting element, measuring unit be connection control unit respectively, measuring unit is for receiving the broadcast of this community, obtain adjacent cell information, transmitting element is for the cell information receiving is sent to UE, and control unit is for according to a upper cell information of memory cell, and the adjacent cell information of receiving element, determine next cell information, and carry out the gravity treatment of community according to described definite next cell information.
As shown in Figure 4, be embodiments of the present invention.When the speed of car-mounted terminal is greater than the speed threshold value of 300km/h, source base station will trigger quick gravity treatment program, start the residence reselecting based on geographical location information that the present invention proposes.When the longitude and latitude position coordinates of longitude and latitude position coordinates that user terminal UE uploads and default gravity treatment point in source base station is consistent, meet reselection criterion requirement, base station initiated quick gravity treatment signaling, by user terminal UE gravity treatment to Target cell.If the speed that the user terminal UE that source base station obtains reports is less than 300km/h speed threshold value, adopt conventional gravity treatment judgement R criterion to carry out gravity treatment.
Fig. 5 is the acquisition methods of best gravity treatment point geographical location information, specific as follows:
After the line of high-speed railway network planning, by emulation, can obtain the position of the plot planning table of a line of high-speed railway and the Overlapping Areas of each community, to method described in the gravity treatment band utilization foregoing invention content of each neighbor cell, obtain the best gravity treatment reference point of the fixed point reselection algorithm of neighbor cell gravity treatment band, finally generate the best gravity treatment reference point list of the fixed point reselection algorithm of a the whole network, and base station, respective cell is preserved and the gravity treatment band position and the best gravity treatment reference point locations that oneself are associated.
According to the best gravity treatment point list of locations of resulting the whole network, can utilize above-mentioned mobile unit in train travelling process, constantly to utilize measurement report information to source base station report position information, when the scope of train operation to best gravity treatment point, mobile unit just sends reselection request to source cell base station, source cell base station response reselection request starts to start fixed point gravity treatment signaling process, until train gravity treatment is to Target cell.
Situation about not conforming to the actual conditions for eliminating simulation result, after high ferro formally puts into effect, generally need to carry out suitable correction to the best gravity treatment reference point list of line of high-speed railway the whole network.For accurate gravity treatment information definite along the line, need to adopt and repeatedly measure the method for analyzing, each gravity treatment band all has a best gravity treatment reference point calculating, and the position of recording these best gravity treatment reference points, for analysis and the improvement of network quality provides Data support.
When concrete definite best gravity treatment reference point, can be by data are carried out to statistical analysis, each gravity treatment band all has a best gravity treatment reference point x who calculates
a, x
b, x
cx
n, the position of recording these best gravity treatment reference points, for analysis and the improvement of network quality provides Data support.In practical operation, can record each at Train run duration and normally according to R criterion, carry out the position of gravity treatment, can record 100 times, then mean value is obtained in the position of each gravity treatment point, can obtain the coordinate of one group of gravity treatment reference point locations along the line like this, afterwards each measurement result of each point and this initial coordinate are compared, each reference point filters out with the original mean value obtaining and differs larger 10 location points, again the measured value of 90 times of remainder is averaged afterwards, using this position coordinates as optimal reference point.
Claims (3)
1. the high-speed railway LTE system cell gravity treatment system based on geographical location information, is characterized in that: comprise receiving element, base station stored unit and judgement trigger element;
Receiving element, the train running speed information and the geographical location information that for receiving mobile unit, report, also can receive the signal quality information of car-mounted terminal simultaneously;
Base station stored unit, for storing the geographical location information of predefined speed decision threshold and high ferro cell reselection band along the line;
Judgement trigger element, for the information that obtains according to described receiving element and the pre-stored information of memory cell, compare, if train running speed is higher than predefined threshold value, and both latitude and longitude information are also consistent, start the cell reselection procedures based on geographical location information;
Mobile unit comprises measuring unit, transmitting element, vehicle-mounted memory cell and control unit, wherein;
Measuring unit, for measuring the speed of service and the geographical location information of train, the signal strength signal intensity that simultaneously can send base station side is measured;
Transmitting element, for when train running speed meets report condition, reports the geographical location information of train;
Control unit, for the control information receiving from base station, and carries out reselection operation;
Vehicle-mounted memory cell, for storing the positional information of adjacent base station.
2. according to the residence reselecting of the high-speed railway LTE system cell gravity treatment system based on geographical location information, its feature comprises:
After subway base station construction along the line completes, according to concrete base station position information and train operation track, generate a neighbor cell list, and according to result, obtain the positional information of each gravity treatment band, be i.e. longitude and latitude positional information;
By aforementionedly obtaining neighbor cell list, latitude and longitude information is pre-stored in corresponding base station memory cell;
The measuring unit of mobile unit is measured the latitude and longitude information in train running speed and train operation, and reports source base station; Control unit, by the cell shielding in train operation rear, only reports that adjacent cell only comprises unique adjacent cell frequency point information, i.e. train operation ahead community in source cell base station;
Source base station receives mobile unit report speed measurement result lower than the threshold value setting in advance, and cell re-selection procedure is followed R criterion;
Source base station receives mobile unit report speed measurement result higher than the threshold value setting in advance, and the data consistent of latitude and longitude information and the storage of base station stored unit, so now starts geographical position, community reuse adoption process;
The method of geographical position, community reuse adoption process is as follows:
When train enters the gravity treatment band of neighbor cell, start to measure the reference signal power of source cell base station and target cell base station, and report source cell base station together with speed now of train, positional information, the metrical information that source cell base station reports according to mobile unit, extract cell-of-origin that train receives and the reference signal power value of Target cell, and calculate train for the reference power difference of Target cell reference power and cell-of-origin;
Cell re-selection procedure is followed R criterion, that is:
Wherein
the RSRP value of measuring community,
defined the deviant of Target cell;
When the signal quality of Target cell is during higher than the signal quality of cell-of-origin, while meeting R criterion, just carry out cell reselection, and this position is the candidate point of best gravity treatment reference point;
Pass through each time the overlapping cover tape of gravity treatment, train all can access satisfactory best gravity treatment reference point candidate point along the line according to said method, and system log (SYSLOG) Train is through the positional information of all points that meet the demands in the process of these gravity treatment bands;
Filter out the reference point differing greatly with mean value, more remaining reference point measured value is averaged afterwards, using this position coordinates as optimal reference point.
3. according to the method for claim 2, it is characterized in that: be accurate gravity treatment information definite along the line, need to adopt and repeatedly measure the method for analyzing, account form is as follows:
Because rail track is one dimension variable, therefore can set initial interchange of position coordinate, be 0, on railway, arbitrarily position coordinates is x, x ∈ [0, S] wherein, S is railway overall length;
Train once passes through the overlapping cover tape of gravity treatment, and can determine best gravity treatment reference point candidate point is discrete function (x
1, x
2, x
3x
n), train repeatedly repeats to pass through from the overlapping cover tape of gravity treatment, can obtain multi-group data (x
11, x
12, x
13x
1a) (x
21, x
22, x
23x
2b) ... (x
n1, x
n2, x
n3x
nm);
By data are carried out to statistical analysis, each gravity treatment band all has a best gravity treatment reference point x who calculates
a, x
b, x
cx
n, the position of recording these best gravity treatment reference points, filters out the reference point differing greatly with mean value, again remaining reference point measured value is averaged afterwards, using this position coordinates as optimal reference point, the 5-15% that the reference point wherein filtering out is whole reference points, measures number of times and is no less than 50.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105828402A (en) * | 2015-01-06 | 2016-08-03 | 中国移动通信集团江苏有限公司 | Blind redirection method, core network and base station |
| CN107454642A (en) * | 2016-06-01 | 2017-12-08 | 通用汽车有限责任公司 | Use the cell selection and gravity treatment of vehicle antenna |
| CN107623592A (en) * | 2017-08-31 | 2018-01-23 | 交控科技股份有限公司 | A kind of detecting system and method for rail vehicle earth communication system |
| WO2018094771A1 (en) * | 2016-11-23 | 2018-05-31 | 广东新岸线计算机系统芯片有限公司 | Wireless communication method and terminal for rail transit |
| CN108551662A (en) * | 2018-04-11 | 2018-09-18 | 四川瑞云信通科技有限公司 | Rail traffic wireless communication calls method |
| CN108601053A (en) * | 2018-07-23 | 2018-09-28 | 华东交通大学 | Wireless network switching optimization method under a kind of high-speed railway scene |
| CN109246591A (en) * | 2017-06-15 | 2019-01-18 | 中国移动通信集团浙江有限公司 | A kind of high-speed rail user off-grid localization method and device |
| CN110753377A (en) * | 2018-07-24 | 2020-02-04 | 普天信息技术有限公司 | Cell switching method based on position, terminal and base station |
| WO2020192454A1 (en) * | 2019-03-28 | 2020-10-01 | 电信科学技术研究院有限公司 | Cell selection method and device |
| WO2022151037A1 (en) * | 2021-01-13 | 2022-07-21 | Apple Inc. | Cell reselection and measurement in a high-speed mode in wireless communications |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873566A (en) * | 2009-04-24 | 2010-10-27 | 中兴通讯股份有限公司 | Mobility management method and system of user terminal along given line |
| CN102300274A (en) * | 2011-09-14 | 2011-12-28 | 北京邮电大学 | Geographical-position-information-based fast handover method for time-division duplex long term evolution (TD-LTE) system |
| WO2013097063A1 (en) * | 2011-12-31 | 2013-07-04 | Telefonaktiebolaget L M Ericsson (Publ) | Mobility management method and apparatus in high speed railway |
| CN103491581A (en) * | 2013-09-27 | 2014-01-01 | 北京邮电大学 | Optimum switching reference point selecting method based on high speed railway fixed-point switching algorithm |
-
2014
- 2014-09-02 CN CN201410441103.1A patent/CN104168614A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873566A (en) * | 2009-04-24 | 2010-10-27 | 中兴通讯股份有限公司 | Mobility management method and system of user terminal along given line |
| CN102300274A (en) * | 2011-09-14 | 2011-12-28 | 北京邮电大学 | Geographical-position-information-based fast handover method for time-division duplex long term evolution (TD-LTE) system |
| WO2013097063A1 (en) * | 2011-12-31 | 2013-07-04 | Telefonaktiebolaget L M Ericsson (Publ) | Mobility management method and apparatus in high speed railway |
| CN103491581A (en) * | 2013-09-27 | 2014-01-01 | 北京邮电大学 | Optimum switching reference point selecting method based on high speed railway fixed-point switching algorithm |
Non-Patent Citations (1)
| Title |
|---|
| 齐天阳等，: ""简论LTE小区重选相关准则"", 《电信快报》 * |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105828402A (en) * | 2015-01-06 | 2016-08-03 | 中国移动通信集团江苏有限公司 | Blind redirection method, core network and base station |
| CN105828402B (en) * | 2015-01-06 | 2019-10-29 | 中国移动通信集团江苏有限公司 | A kind of blind reorientation method and core net, base station |
| CN107454642B (en) * | 2016-06-01 | 2020-08-11 | 通用汽车有限责任公司 | Cell selection and reselection using vehicle antennas |
| CN107454642A (en) * | 2016-06-01 | 2017-12-08 | 通用汽车有限责任公司 | Use the cell selection and gravity treatment of vehicle antenna |
| WO2018094771A1 (en) * | 2016-11-23 | 2018-05-31 | 广东新岸线计算机系统芯片有限公司 | Wireless communication method and terminal for rail transit |
| US10841855B2 (en) | 2016-11-23 | 2020-11-17 | Guangdong Nufront Computer System Chip Co., Ltd. | Wireless communication method and terminal for rail transit |
| CN109246591A (en) * | 2017-06-15 | 2019-01-18 | 中国移动通信集团浙江有限公司 | A kind of high-speed rail user off-grid localization method and device |
| CN109246591B (en) * | 2017-06-15 | 2020-09-04 | 中国移动通信集团浙江有限公司 | High-speed rail user off-line positioning method and device |
| CN107623592A (en) * | 2017-08-31 | 2018-01-23 | 交控科技股份有限公司 | A kind of detecting system and method for rail vehicle earth communication system |
| CN107623592B (en) * | 2017-08-31 | 2020-09-01 | 交控科技股份有限公司 | Detection system and method for rail transit vehicle-ground communication system |
| CN108551662A (en) * | 2018-04-11 | 2018-09-18 | 四川瑞云信通科技有限公司 | Rail traffic wireless communication calls method |
| CN108551662B (en) * | 2018-04-11 | 2020-10-20 | 四川瑞云信通科技有限公司 | Rail transit wireless communication calling method |
| CN108601053B (en) * | 2018-07-23 | 2020-07-24 | 华东交通大学 | Wireless network switching optimization method in high-speed railway scene |
| CN108601053A (en) * | 2018-07-23 | 2018-09-28 | 华东交通大学 | Wireless network switching optimization method under a kind of high-speed railway scene |
| CN110753377A (en) * | 2018-07-24 | 2020-02-04 | 普天信息技术有限公司 | Cell switching method based on position, terminal and base station |
| WO2020192454A1 (en) * | 2019-03-28 | 2020-10-01 | 电信科学技术研究院有限公司 | Cell selection method and device |
| CN111757411A (en) * | 2019-03-28 | 2020-10-09 | 电信科学技术研究院有限公司 | Cell selection method and device |
| CN111757411B (en) * | 2019-03-28 | 2022-08-09 | 大唐移动通信设备有限公司 | Cell selection method and device |
| WO2022151037A1 (en) * | 2021-01-13 | 2022-07-21 | Apple Inc. | Cell reselection and measurement in a high-speed mode in wireless communications |
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Application publication date: 20141126 |