CN106102108A - A kind of intelligent switch method of High Speed Railway Trains wireless access network - Google Patents
A kind of intelligent switch method of High Speed Railway Trains wireless access network Download PDFInfo
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- CN106102108A CN106102108A CN201610683206.8A CN201610683206A CN106102108A CN 106102108 A CN106102108 A CN 106102108A CN 201610683206 A CN201610683206 A CN 201610683206A CN 106102108 A CN106102108 A CN 106102108A
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- high speed
- speed railway
- railway trains
- switching
- target cell
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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
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
Abstract
The present invention relates to the intelligent switch method of a kind of High Speed Railway Trains wireless access network, belong to wireless communication field.Present invention moving characteristic based on High Speed Railway Trains, establishes High Speed Railway Trains to be switched target cell data storehouse and handover trigger locality database；When pressure transducer and mobile network perceive train arrival handover trigger place, system is automatically extracted the Target cell of correspondence from the data base of switching target small area, and then is completed switching.Different from existing legacy user end UE auxiliary switching, the present invention measures without user side, but is switched by system complete independently intelligently, significantly reduces total handover delay, drastically increases the service quality of handover success rate and wireless access.
Description
Technical field
The present invention relates to wireless communication field, particularly to the intelligence switching side of a kind of High Speed Railway Trains wireless access network
Method.
Background technology
Cut-off will be to the end of the year 2015, and the total revenue kilometres of China Railway High-speed reach 1.9 ten thousand kilometers and (account for world's high-speed railway always to transport
More than the 60% of battalion's mileage), it is contemplated that it is up to 30,000 kilometers to the year two thousand twenty China Railway High-speed total kilometrage.By the end of 2016 7
Month, China Express Railway train the accumulative passenger of transmission measure more than 5,000,000,000 person-times, and the average daily passenger of transmission measures more than 4,000,000 person-times.
Along with the high speed development of China's economic and popularizing of smart mobile phone, increasing High Speed Railway Trains passenger wants at height
Wireless broadband access service is enjoyed on speed railroad train.But, the high-speed mobile instrument offer being up to 350km/h for speed can
By and stable broadband inserting service is always the significant challenge of global communications industry.Maximum of which challenge is exactly under high-speed mobile
Wireless access network switching problem.Tradition mobile network handoff technique uses user side (UE, User Equipment) auxiliary
Switching, this switching mode needs ustomer premises access equipment to measure the signal quality of several neighbouring neighbor cells, base station
Select the best community of signal quality as switching target small area according to measurement report.This metering system needs substantial amounts of measurement
Time, adding handover trigger time delay (TTT, Time to Trigger) and switching execution time, total handover delay is the most very
Difficulty meets the switching demand of High Speed Railway Trains passenger, and then causes the highest cutting off rate.According to the measurement data of China Mobile, right
20-30% is reached in the regional cutting off rate not having High Speed Railway Trains private network to cover, and for the high-speed railway having private network to cover
Train area cutting off rate is still up to 5.3%.
CN201010104548.2 discloses a kind of GSM-R fast handoff method towards CTCS-3 business, it
Purpose is to provide a kind of measurement eliminating handover and judging process, reduce guard time required for handoff procedure with
And network overlapped overlay area, save Internet resources, greatly improved train CTCS-3 in the case of high-speed cruising and move
The handover success rate of dynamic platform, is also greatly reduced the communication interruption probability GSM-R towards CTCS-3 business of CTCS-3 business
Fast handoff method.This technical scheme: the described GSM-R fast handoff method towards CTCS-3 business, including: step
Rapid 201, for each base station cell that railway line is along the line, according to current of traffic, for its definition two incision communities, one
For primary, one is standby；Step 202, train triggers handover when running along a direction；Step 203, determines that train is transported
Line direction is upstream or downstream；Step 204, it is judged that whether primary incision community can be cut, if yes then enter step 207,
Otherwise enter next step；Step 205, it is judged that whether standby incision community can be cut, if yes then enter step 207, otherwise
Enter next step；Step 206, uses standby traditional PBGT algorithm to implement handover；Step 207, cuts successfully.It is not enough
Part is: on the one hand, this changing method is only for the switching of Train Control signal CTCS-3 business, and is not directed in car
The data service switching of the radio bandwidth access network of passenger；Secondly, this changing method is for GSM-R system, and this system belongs to
In second generation mobile communication system, and this system cannot provide wireless broadband access service for high ferro passenger at all；Additionally, should
Changing method still belongs to traditional Mobile Assisted Handover, needs to judge whether two alternative cell can cut by mobile station
Enter.
CN 201010187154.8 discloses train-ground communication multi-vehicle mounted station cooperation cell switching under a kind of high-speed mobile environment
Method, its purpose is to provide train-ground communication multi-vehicle mounted station cooperation cell changing method under a kind of high-speed mobile environment, the method
When carrying out community switching, switching time is short and communicates in handoff procedure and does not interrupts, it is possible to meet under high-speed mobile environment
The requirement of train-ground communication.Under this high-speed mobile environment, train-ground communication multi-vehicle mounted station cooperation cell changing method, the steps include: A, row
A Vehicle mounted station, respectively front end Vehicle mounted station and rear end Vehicle mounted station are respectively installed in car front-end and back-end；B, Vehicle mounted station pass through compartment width
Band LAN is connected with vehicle-mounted control station, and the data transmit-receive of Vehicle mounted station and signalling interactive process are by vehicle-mounted control station centralized Control；
C, control station detect that Vehicle mounted station receives signal and meets switching condition, trigger Vehicle mounted station and switch over；As front end Vehicle mounted station switches
During success, rear end Vehicle mounted station not yet triggers switching, and vehicle-mounted control station is Vehicle mounted station pre-Shen in rear end by front end Vehicle mounted station to base station
Please the communication resource, when rear end Vehicle mounted station is triggered switching, directly changes duty and enter the communication resource of preliminery application and complete
Switching；If front end Vehicle mounted station is not fully complete switching, rear end Vehicle mounted station has triggered handoff procedure, then rear end Vehicle mounted station directly utilizes
The available information that front end Vehicle mounted station has obtained switches over；After D, Vehicle mounted station complete switching, then carry out data with new base station
Transmitting-receiving.Its weak point is: first, and documents still rests on traditional Mobile Assisted Handover, needs by mobile station
Switch over measurement；Second, documents is made by the double jump (base station-train, train-mobile station) that the beginning and the end vehicle microscope carrier completes and connects
Entering planar network architecture, this system architecture needs to carry two Vehicle mounted stations ON TRAINS, and affixes one's name to WLAN at interior, not only needs
The approval of railway authorities to be obtained, and need to spend the highest cost.
Summary of the invention
It is an object of the invention to provide a kind of is the switching of system complete independently by traditional UE auxiliary switch transition, it is not necessary to logical
Cross user side UE measurement to determine Target cell, but system is according to High Speed Railway Trains movement law and running route intelligently
Determine Target cell, so that the handover delay of High Speed Railway Trains wireless access network is greatly reduced, and then high-speed railway is substantially improved
The handover success rate of train mobile subscriber and the intelligent switch method of the High Speed Railway Trains wireless access network of service quality.
The technical solution of the present invention is the intelligent switch method of described High Speed Railway Trains wireless access network, and it is special
Part is, comprises the following steps:
(1) moving characteristic based on High Speed Railway Trains, sets up High Speed Railway Trains to be switched target cell data storehouse and cuts
Change triggering locality database；
(2) utilize pressure transducer and mobile network to combine the position determining High Speed Railway Trains and mobile station；
When pressure transducer and mobile network perceive High Speed Railway Trains arrive handover trigger place time, system automatically from
Switching target small area data base extracts the Target cell of correspondence, the mobile subscriber in train is switched to this community.
As preferably: (1) described step farther includes:
(1.1) characteristics of motion based on High Speed Railway Trains and running route, system is in advance for the height of each train number
Speed railroad train generates to be switched target cell list, and the to be switched cell list composition of all train number High Speed Railway Trains is at a high speed
Railroad train candidate target cells data base.
As preferably: described step (1.1) farther includes:
(1.1.1) according to the working line of High Speed Railway Trains, mobile communication system is according to High Speed Railway Trains successively warp
The community crossed, generates the data base of to be switched Target cell；
(1.1.2) along line of high-speed railway, according to measurement data or switching historical record draw all neighbor cells it
Between the equal handover trigger place M of signal quality, generate handover trigger locality database；
(1.1.3) according to the traffic direction of High Speed Railway Trains, determine that handover trigger place M is corresponding with between Target cell
Relation.
As preferably: (2) described step farther includes:
(2.1) in High Speed Railway Trains system, rail foot installs pressure transducer, is used for accurately determining the position of train
Put；Meanwhile, utilize the ability that mobile station is accurately positioned by mobile communication system, determined the position of mobile station by mobile network,
And utilize pressure transducer and mobile network to combine the position determining train and mobile station.
As preferably: (3) described step farther includes:
(3.1) according to handover trigger locality database, it is judged that whether High Speed Railway Trains arrives handover trigger place？If it is high
Speed railroad train arrives and triggers place M, and system triggers switching immediately, starts to select switching target small area；If not arriving limit, community
Edge, continues detection High Speed Railway Trains position, waits that High Speed Railway Trains arrives and triggers place；
(3.2) once High Speed Railway Trains arrives the triggering switching place M of neighbor cell, then from candidate list certainly
Dynamic this Target cell corresponding to triggering place of extraction；Afterwards, system is by all mobile subscribers in same High Speed Railway Trains
It is switched to Target cell.
As preferably: described step (3.1) farther includes:
(3.1.1) judge whether train arrives handover trigger place M1: if arriving M1, trigger switching the most immediately；Otherwise return
Return step 2, wait that High Speed Railway Trains arrives and trigger place M1；
As preferably: described step (3.2) farther includes:
(3.2.1), after triggering switching, it is right that system extracts M1 institute in handover trigger place to be switched target cell data table
The Target cell (community-2) answered；
(3.2.2) system arrives the order in handover trigger place according to the user's mobile station in same High Speed Railway Trains,
They are switched in batches community-2；
(3.2.3) after having switched, return step 2, redefine train position, wait that High Speed Railway Trains arrives next
Individual handover trigger place M2；If arriving M2, then it is switched to community-3 corresponding to M2, by that analogy, high-speed railway by above-mentioned steps
User on train is constantly switched to new Target cell.
Compared with prior art, beneficial effects of the present invention:
The present invention has great industry meaning for common carrier and railway operator.With existing legacy user's end
UE auxiliary switching difference, the present invention switches over measurement without user side UE, but is switched by system complete independently intelligently.As
This one, the present invention has just directly cut down signal quality measured time and handover trigger time delay, significantly in total handover delay
Reduce total handover delay, drastically increase the service quality of handover success rate and wireless access.
With aforementioned 201010104548.2 difference: the present invention is to utilize pressure transducer and mobile network to combine to determine at a high speed
Railroad train and the position of mobile station, arrive handover trigger place when pressure transducer and mobile network perceive High Speed Railway Trains
Time, system is automatically extracted the Target cell of correspondence from the data base of switching target small area, the mobile subscriber in train is switched to
This community.This documents is then that the more district of the CTCS-3 Train Control business carried out in the railway line that GSM-R covers cuts
Change.Thus, the technological means of employing is different, compares this documents and understands: on the one hand, this documents is only for train
The switching of control signal CTCS-3 business, and it is not directed to the data service switching of the radio bandwidth access network of passenger inside the vehicle, this
To there is provided the object of service to have significantly different with the present invention；On the other hand, this documents is for GSM-R system, and this is
Subordination is in second generation mobile communication system, and this system cannot provide wireless broadband access service for high ferro passenger at all, and
The present invention is then to provide intelligence handover scheme for high ferro radio bandwidth access network, and both provide the communication system of handoff solution
Also have significantly different.It follows that technical scheme be better than this documents have the technical effect that first, this programme
Can be that high ferro radio bandwidth access network provides the intelligence of high-speed data service to switch, this documents be then simply for GSM-R system
CTCS-3 Train Control business under Tong provides switching, rather than for data service；Second, the present invention is by system complete independently
Switching, it is not necessary to the auxiliary of mobile station, and this documents is still that traditional Mobile Assisted Handover, needs by mobile station
Judge to treat whether two alternative switching cells can be cut.
With aforementioned 201010187154.8 difference: the present invention is to utilize pressure transducer and mobile network to combine to determine at a high speed
Railroad train and the position of mobile station, arrive handover trigger place when pressure transducer and mobile network perceive High Speed Railway Trains
Time, system is automatically extracted the Target cell of correspondence from the data base of switching target small area, the mobile subscriber in train is switched to
This community.This documents is then that control station detects that Vehicle mounted station receives signal and meets switching condition, triggers Vehicle mounted station and carries out
Switching；During such as front end Vehicle mounted station handover success, rear end Vehicle mounted station not yet triggers switching, vehicle-mounted control station by front end Vehicle mounted station to
Base station is the rear end Vehicle mounted station preliminery application communication resource, when rear end Vehicle mounted station is triggered switching, directly changes duty and enters
The communication resource of preliminery application completes switching；If front end Vehicle mounted station is not fully complete switching, rear end Vehicle mounted station has triggered handoff procedure,
Then rear end Vehicle mounted station directly utilizes the available information that front end Vehicle mounted station obtained and switches over；After Vehicle mounted station completes switching, then
With the transmitting-receiving that new base station carries out data.Thus, the present invention compared with this documents, the technological means of employing and the skill reached
Art effect has a biggest difference: first, and this documents still rests on traditional Mobile Assisted Handover, needs by shifting
Dynamic platform switches over measurement, and the present invention is then by the switching of system complete independently, it is not necessary to switch over measurement；Second, this is right
Being made by, than file, double jump (base station-train, train-mobile station) the access network framework that the beginning and the end vehicle microscope carrier completes, the present invention is then
Without the high speed of train mobile station just can be completed by double jump framework and Vehicle mounted station without interrupting switching.
Accompanying drawing explanation
Fig. 1 is High Speed Railway Trains wireless access network intelligence switching flow figure.
Fig. 2 is cell edge handover trigger place schematic diagram.
Fig. 3 is that High Speed Railway Trains wireless access network intelligence switches example schematic.
Detailed description of the invention
The present invention is further detailed in conjunction with the accompanying drawings below:
In the present embodiment, traditional user side UE auxiliary switch transition has been become by the intelligence switching of system complete independently
Technology, thus significantly reduce handover delay.It follows that High Speed Railway Trains wireless access network is described with the example in Fig. 3
The detailed description of the invention of intelligence switching.Its detailed operation flow process is as follows:
(1). first according to the working line of train in Fig. 3, the community that mobile communication system sequentially passes through according to train, raw
Become to be switched target cell list: community-1, community-2, community-3, community-4, community-5；Along line of high-speed railway, according to
Measurement data or switching historical record draw the place M that between all neighbor cells, signal quality is equal, generate handover trigger ground
Point data list: M1, M2, M3, M4.According to the traffic direction of train, determine handover trigger place and to be switched Target cell it
Between corresponding relation: M1 respective cell-2, M2 respective cell-3, M3 respective cell-4, M4 respective cell-5；
(2). utilize pressure transducer and mobile network to combine the position determining train and mobile station.As it is shown on figure 3, determine
The position of train and mobile station is in community-1 at present；
(3). judge whether train arrives handover trigger place M1: if arriving M1, trigger switching the most immediately；Otherwise return step
Rapid 2, wait that train arrives and trigger place M1；
(4). after triggering switching, system is extracted corresponding to the M1 of handover trigger place to be switched target cell data table
Target cell (community-2)；
(5). system arrives the order in handover trigger place according to the user's mobile station in same train, they is cut in batches
Change to community-2；
(6). after having switched, return step 2, redefine train position, wait that train arrives next handover trigger ground
Point M2；If arriving M2, being then switched to community-3 corresponding to M2 by above-mentioned steps, by that analogy, the user on train is constantly cut
Change to new Target cell.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the invention as claimed with
Modify, all should belong to the covering scope of the claims in the present invention.
Claims (7)
1. the intelligent switch method of a High Speed Railway Trains wireless access network, it is characterised in that comprise the following steps:
(1) moving characteristic based on High Speed Railway Trains, sets up High Speed Railway Trains to be switched target cell data storehouse and switching is touched
Send out locality database；
(2) utilize pressure transducer and mobile network to combine the position determining High Speed Railway Trains and mobile station；
(3), when pressure transducer and mobile network perceive High Speed Railway Trains arrival handover trigger place, system is automatically from switching
Target cell data storehouse is extracted the Target cell of correspondence, the mobile subscriber in train is switched to this community.
The intelligent switch method of High Speed Railway Trains wireless access network the most according to claim 1, it is characterised in that described step
Suddenly (1) farther include:
(1.1) characteristics of motion based on High Speed Railway Trains and running route, system is in advance for the high-speed iron of each train number
Road train generates to be switched target cell list, the to be switched cell list composition high-speed railway of all train number High Speed Railway Trains
Train candidate's target cell data storehouse.
The intelligent switch method of High Speed Railway Trains wireless access network the most according to claim 2, it is characterised in that described step
Suddenly (1.1) farther include:
(1.1.1) according to the working line of High Speed Railway Trains, mobile communication system sequentially passes through according to High Speed Railway Trains
Community, generates the data base of to be switched Target cell；
(1.1.2) along line of high-speed railway, draw according to measurement data or switching historical record and believe between all neighbor cells
Number handover trigger place M that quality is equal, generates handover trigger locality database；
(1.1.3) according to the traffic direction of High Speed Railway Trains, determine that handover trigger place M is corresponding with between Target cell and close
System.
The intelligent switch method of High Speed Railway Trains wireless access network the most according to claim 1, it is characterised in that described step
Suddenly (2) farther include:
(2.1) in High Speed Railway Trains system, rail foot installs pressure transducer, is used for accurately determining the position of train；
Meanwhile, utilize the ability that mobile station is accurately positioned by mobile communication system, determined the position of mobile station, and profit by mobile network
The position determining train and mobile station is combined with pressure transducer and mobile network.
The intelligent switch method of High Speed Railway Trains wireless access network the most according to claim 1, it is characterised in that described step
Suddenly (3) farther include:
(3.1) according to handover trigger locality database, it is judged that whether High Speed Railway Trains arrives handover trigger place？If high-speed iron
Road train arrives and triggers place M, and system triggers switching immediately, starts to select switching target small area；If not arriving cell edge, continue
Continuous detection High Speed Railway Trains position, waits that High Speed Railway Trains arrives and triggers place；
(3.2) once High Speed Railway Trains arrives the triggering switching place M of neighbor cell, then automatically carry from candidate list
Take this Target cell corresponding to triggering place；Afterwards, all mobile subscribers in same High Speed Railway Trains are switched by system
To Target cell.
The intelligent switch method of High Speed Railway Trains wireless access network the most according to claim 5, it is characterised in that described step
Suddenly (3.1) farther include:
(3.1.1) judge whether train arrives handover trigger place M1: if arriving M1, trigger switching the most immediately；Otherwise return step
Rapid 2, wait that High Speed Railway Trains arrives and trigger place M1.
The intelligent switch method of High Speed Railway Trains wireless access network the most according to claim 5, it is characterised in that described step
Suddenly (3.2) farther include:
(3.2.1), after triggering switching, system is extracted corresponding to the M1 of handover trigger place to be switched target cell data table
Target cell (community-2)；
(3.2.2) system arrives the order in handover trigger place according to the user's mobile station in same High Speed Railway Trains, by him
Be switched to community-2 in batches；
(3.2.3) after having switched, return step 2, redefine train position, wait that High Speed Railway Trains arrives the next one and cuts
Change triggering place M2；If arriving M2, then it is switched to community-3 corresponding to M2, by that analogy, High Speed Railway Trains by above-mentioned steps
On user be constantly switched to new Target cell.
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| CN201610683206.8A CN106102108A (en) | 2016-08-18 | 2016-08-18 | A kind of intelligent switch method of High Speed Railway Trains wireless access network |
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| CN107105450A (en) * | 2017-05-18 | 2017-08-29 | 华为技术有限公司 | Signal quality on vehicle working line determines method and device |
| CN107911848A (en) * | 2017-12-26 | 2018-04-13 | 广东欧珀移动通信有限公司 | Method for switching network and device |
| CN110035409A (en) * | 2018-01-12 | 2019-07-19 | 联发科技股份有限公司 | Method and electronic device for being communicated on high-speed railway |
| CN110505665A (en) * | 2019-08-08 | 2019-11-26 | 武汉绿色网络信息服务有限责任公司 | A kind of high-speed rail mobile terminal user cell switching method and system |
| CN111567091A (en) * | 2018-10-16 | 2020-08-21 | 华为技术有限公司 | Cell switching method and device under high-speed mobile scene |
| CN111836316A (en) * | 2019-04-23 | 2020-10-27 | 中国移动通信有限公司研究院 | Switching method, switching device and communication equipment |
| CN114286410A (en) * | 2021-12-31 | 2022-04-05 | 南京国博电子股份有限公司 | Base station switching method based on train position and driving direction |
| CN114339904A (en) * | 2020-09-30 | 2022-04-12 | 北京小米移动软件有限公司 | Cell switching method, cell switching device and storage medium |
| CN114513821A (en) * | 2020-11-16 | 2022-05-17 | 深圳市万普拉斯科技有限公司 | Cell switching method and device and terminal equipment |
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| CN107105450A (en) * | 2017-05-18 | 2017-08-29 | 华为技术有限公司 | Signal quality on vehicle working line determines method and device |
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| CN114513821A (en) * | 2020-11-16 | 2022-05-17 | 深圳市万普拉斯科技有限公司 | Cell switching method and device and terminal equipment |
| CN114286410A (en) * | 2021-12-31 | 2022-04-05 | 南京国博电子股份有限公司 | Base station switching method based on train position and driving direction |
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