CN106347419A - Communication method and system in area connecting process in high-speed train - Google Patents
Communication method and system in area connecting process in high-speed train Download PDFInfo
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- CN106347419A CN106347419A CN201610800214.6A CN201610800214A CN106347419A CN 106347419 A CN106347419 A CN 106347419A CN 201610800214 A CN201610800214 A CN 201610800214A CN 106347419 A CN106347419 A CN 106347419A
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- control unit
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- bullet train
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
- B61L27/70—Details of trackside communication
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Abstract
The embodiment of the invention discloses a communication method and system in the area connecting process in a high-speed train. The communication method includes the steps that a first area control unit sends an area switching request to a central control unit; the central control unit and a second area control unit are coordinated to give an instruction for area switching; the first area control unit is based on are switching, and the working frequency, distributed by the second area control unit, of the high-speed train is obtained; when it is judged that the front end of a vehicle-mounted mobile radio station of the high-speed train passes through the last base station, the vehicle-mounted mobile radio station of the high-speed train conducts frequency-hopping work. The embodiment of the communication method and system in the area connecting process in the high-speed train are adopted, based on the positioning technology and the frequency-hopping working procedure, and in this way, the sufficient time response exists in the signaling procedure and the response time.
Description
Technical field
The present invention relates to communication technical field, the communication party during Local handover in more particularly, to a kind of bullet train
Method and system.
Background technology
Gsm-r (gsm for railway) Chinese full name is Railway Mobile Radio system standard, and China covers the most now
Big gsm network standard is similar, is the mobile communication railway dedicated system that first Chinese is introduced from Europe.Technology with gsm
Reach its maturity, range expands rapidly, cost is gradually reduced, and due to user is rapid extend in the case of, cluster
The problems of mobile communication solution is increasingly prominent, and the Railway Mobile Radio system in Europe is finally positioned the side of gsm
Formula, that is, the key element that some suitable high-speed mobile environments use is added on gsm standard, this technology is in the initiation of gsm
Regional Europe is praised highly, and Germany and the country such as France, Holland, Switzerland have carried out distributing telephone numbers of gsm-r along the railway.
Gsm-r is a kind of professional radio digital communication system exclusively for Railway Design, based on gsm systems technology platform,
The features such as railway communication train scheduling, Train Control, support bullet train, provide the additional function of customization for railway operation
A kind of economical and efficient integration radio communication system, and the characteristic that Railway Mobile Radio is had (grouies busy, group is exhaled, preferentially
Rank, intrusion, the function such as toll breakdown) add, constitute the solution that gsmr is used for the global system for mobile communications of railway.From collection
From the perspective of group communication, gsm-r is a kind of digital group system, is provided that train dispatch radio communication, the communication that makes up of trains, meets an urgent need
The function of voice communication such as communication, the communication of maintenance group.It is the wireless of 0-500km/ hour that gsm-r can meet train running speed
Communicating requirement, safety is good.Gsm-r can be used as the good transmission platform of signal and train control system, etcs Europe just in test
Continent train control system (also referred to as fzb) and the train control system (ffb) of another kind of low cost being used for less than 160 kilometers, all
It is as transmission platform using gsm-r.
Gsm-r system substantially can meet the big function of railway transportation information service ten: locomotive synchronous operation control system
Information transfer, the information transfer of train control system, dispatching communication, wireless running number information, the transmission of ctc traffic order,
Train tail wind pressure information transmission, locomotive comprehensive monitoring information transmission (bow condition, operating mode, axle temperature etc.), passenger vehicle run safety monitoring
System (tcds) information transmission, the information transmission of passenger's mobile information service system, large-scale marshalling yard/station comprehensive mobile information
The information transmission of service system, interval mobile communication and public affair mobile communication.
Existing railway gsm-r system, in the switching across bsc, is to need msc to assist, does not directly mutually assist between bsc
Adjust: bsc (a) first initiates ho_req to msc, msc initiates ho_req to bsc (b), b is sending Channel Activation order to bts
B (), bts (b) responds to bsc (b) in reply Channel Activation, and bsc (b) sends ho_req_ack to msc again, and msc is again to bsc
A () sends switching command, be issued to mobile phone, and mobile phone sends change detection (ho_detect), subsequent ms to bsc (b) and msc again
Handover success sends, to bsc (b) and msc, the message that switching completes, and msc receives backward bsc (a) and sends clear command, due to across
The switching of bsc needs the intervention of upper level msc, all not enough on signaling process and response time.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art, the invention provides the region in a kind of bullet train is handed over
Communication means in termination process and system, for the bullet train Local handover process under double loop network pattern, in conjunction with car ground number
According to the twin nuclei in chain overall plan, realize the handoff procedure that two Region control units directly consult vehicle-mounted mobile station, and
The control not needing upper level central control unit intervenes.
In order to solve the above problems, the present invention proposes the communication party during the Local handover in a kind of bullet train
Method, comprises the steps:
First area control unit judges that bullet train will enter the bicyclic communication associated by the control unit of first area
During latter two base station in network, first area control unit sending zone handovers request to central control unit；
Central control unit is sent instruction after being coordinated with second area control unit and carries out region switching；
First area control unit is based on region switching and obtains second area control unit is bullet train assignment
Frequency；
Whether the vehicle-mounted mobile station front end judging bullet train is by last associated by the control unit of first area
Base station, passes through last base station associated by the control unit of first area in the vehicle-mounted mobile station front end judging bullet train
When, the vehicle-mounted mobile station of bullet train carries out frequency hopping work, and the operating frequency at vehicle-mounted mobile station is adjusted to second area control
Unit is bullet train institute assignment frequency.
Send instruction after the coordination of described central control unit and second area control unit and carry out region switching and include:
Second area control unit covered by the base station that will enter associated by second area control unit under high speed
Train distributes a time slot, and issues broadcast data using tdma technology by closing on the base station of first area control unit.
Whether the described vehicle-mounted mobile station front end judging bullet train passes through last base station of first area control unit
Including:
Obtain the positional information of vehicle-mounted mobile station front end by gps alignment system or BEI-DOU position system in real time；
Compare in the position of the positional information based on described vehicle-mounted mobile station front end and last base station；
Judge by comparison result whether the vehicle-mounted mobile station front end of bullet train is last by first area control unit
One base station.
The vehicle-mounted mobile station of described bullet train carries out frequency hopping work, and the operating frequency at vehicle-mounted mobile station is adjusted to second
Region control unit includes for bullet train institute assignment frequency:
When last base station of first area control unit is passed through in the vehicle-mounted mobile station front end judging bullet train, change
The operating frequency of vehicle-mounted mobile station front end；
When the first base station associated by second area control unit is passed through in the vehicle-mounted mobile station front end judging bullet train,
Change the operating frequency of vehicle-mounted mobile station rear end, described first base station closes on last base station of first area control unit.
Methods described also includes: after the vehicle-mounted mobile station of bullet train completes frequency hopping work, central control unit sends
Order makes first area control unit be released to the tdma time interval resource that bullet train is distributed.
Accordingly, present invention also offers communication system during a kind of Local handover in bullet train, described system
System includes:
First area control unit, bicyclic associated by the control unit of first area for judging that bullet train will enter
During latter two base station in communication network, sending zone handovers request to central control unit；And obtained based on region switching
Take second area control unit to be bullet train assignment frequency, and whether judge the vehicle-mounted mobile station front end of bullet train
By last base station associated by the control unit of first area, pass through the in the vehicle-mounted mobile station front end judging bullet train
During last base station associated by one Region control unit, the vehicle-mounted mobile station of bullet train carries out frequency hopping work, will be vehicle-mounted
The operating frequency of movement station is adjusted to second area control unit for bullet train institute assignment frequency；
Central control unit, after being used for receiving region handover request, sends instruction after coordinating with second area control unit
Carry out region switching.
Described second area control unit is used for being covered by the base station that will enter associated by second area control unit
Under bullet train distribute a time slot, and using tdma technology by close on first area control unit base station issue broadcast
Data.
Described first area control unit is used for obtaining vehicle-mounted shifting in real time by gps alignment system or BEI-DOU position system
The positional information of dynamic station front end, the positional information based on described vehicle-mounted mobile station front end and the position of last base station are compared
Right；Whether control unit last base in first area is passed through by the vehicle-mounted mobile station front end that comparison result judges bullet train
Stand.
Described first area control unit is used for controlling by first area in the vehicle-mounted mobile station front end judging bullet train
During last base station of unit processed, change the operating frequency of vehicle-mounted mobile station front end；At the vehicle-mounted mobile station judging bullet train
When the first base station associated by second area control unit is passed through in front end, change the operating frequency of vehicle-mounted mobile station rear end, described
First base station closes on last base station of first area control unit.
After the vehicle-mounted mobile station of bullet train completes frequency hopping work, described central control unit is additionally operable to transmission order to be made
First area control unit is released to the tdma time interval resource that bullet train is distributed.
In embodiments of the present invention, in conjunction with the bicyclic communication network architecture in car ground Data-Link overall plan, realize Liang Ge area
Domain control unit directly consults the handoff procedure at vehicle-mounted mobile station, without the intervention of upper level central control unit, switches
Result is notified that central control unit.Occur in the bicyclic communication network of Region control unit 1 and Region control unit 2 control
The situation that only one of which ring can be communicated with train, the data only one of which base station ring that therefore Region control unit receives
Signal, now system redundancy minimizing half, the base station range of enlarged region cross-connecting area is conducive to improving radio signal quality
With the reliability of Local handover, therefore all there is on signaling process and response time the time response of abundance.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 be the Local handover in the bullet train in the embodiment of the present invention during communication means flow chart；
Fig. 2 is the Local handover schematic diagram in the embodiment of the present invention；
Fig. 3 is base station signal scattergram before Local handover in the embodiment of the present invention prepares；
Fig. 4 is base station signal scattergram during the Local handover preparation in the embodiment of the present invention；
Fig. 5 is base station signal scattergram during the start region handing-over in the embodiment of the present invention；
Fig. 6 be in the embodiment of the present invention be near completion Local handover when base station signal scattergram；
Fig. 7 is the communication system architecture schematic diagram during Local handover in bullet train in the embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
The communication means during the Local handover in bullet train in the embodiment of the present invention, it passes through: first area
Control unit judge bullet train will enter in the bicyclic communication network associated by the control unit of first area latter two
During base station, first area control unit sending zone handovers request to central control unit；Central control unit and second area
Control unit sends instruction after coordinating and carries out region switching；First area control unit is based on region switching and obtains second area control
Unit processed is bullet train assignment frequency；Judge whether the vehicle-mounted mobile station front end of bullet train is controlled by first area
Last base station associated by unit processed, passes through first area control unit in the vehicle-mounted mobile station front end judging bullet train
During last base station associated, the vehicle-mounted mobile station of bullet train carries out frequency hopping work, by the work frequency at vehicle-mounted mobile station
Rate is adjusted to second area control unit for bullet train institute assignment frequency.
Specifically, Fig. 1 shows the communication means during the Local handover in the bullet train in the embodiment of the present invention
Flow chart, specifically includes as follows:
Start；
S101, judge whether bullet train will enter in the bicyclic communication network associated by the control unit of first area
Latter two base station, if latter two base station will be entered, enters s102, otherwise continues judge process；
In specific implementation process, vehicle-mounted mobile station can be obtained in real time by gps alignment system or BEI-DOU position system
The positional information of front end, compares in the position of the positional information based on vehicle-mounted vehicle-mounted mobile station front end and finally several base stations；
Whether entered into finally in several base station sequence by the bullet train that comparison result judges bullet train.
It is also possible to pass through to judge the communications status between bullet train and base station, by which obtains in specific implementation process
Base station and bullet train, also when being in communications status, judge corresponding base station location, come anticipation whether enter into finally several
In the sequence of base station.
S102, first area control unit sending zone handover request to central control unit；
S103, central control unit and second area control unit send instruction after coordinating and carry out region switching；S104,
Bullet train under two Region control units are covered by the base station that will enter associated by second area control unit distributes one
Individual time slot；
In specific implementation process, second area control unit is the base station that will enter associated by second area control unit
Bullet train under being covered distributes a time slot, and is sent out by closing on the base station of first area control unit using tdma technology
Cloth broadcast data.
S105, first area control unit switch what acquisition second area control unit was distributed for bullet train based on region
Operating frequency；
S106, judge the vehicle-mounted mobile station front end of bullet train whether by last associated by the control unit of first area
One base station, if passing through last base station, enters s106, otherwise continues judge process；
In specific implementation process, vehicle-mounted mobile station front end is obtained in real time by gps alignment system or BEI-DOU position system
Positional information；Compare in the position of the positional information based on vehicle-mounted mobile station front end and last base station；By comparing
Result judges whether the vehicle-mounted mobile station front end of bullet train passes through last base station of first area control unit.
S107, the operating frequency of change vehicle-mounted mobile station front end；
S108, judge the vehicle-mounted mobile station front end of bullet train whether by first associated by second area control unit
Base station, if passing through first base station, enters s109, otherwise continues to judge；
In specific implementation process, vehicle-mounted mobile station front end is obtained in real time by gps alignment system or BEI-DOU position system
Positional information；The position of the first base station that the positional information based on vehicle-mounted mobile station front end and second area control unit are contacted
Put and compare；Whether first base station is passed through by the vehicle-mounted mobile station front end that comparison result judges bullet train, here the
Last base station of first area control unit is closed in one base station.
S109, the operating frequency of change vehicle-mounted mobile station rear end；
S110, central control unit send order makes first area control unit be released to the tdma that bullet train is distributed
Time interval resource；
Terminate.
Local handover is exactly that train enters adjacent area un-interrupted from the area communication of a Region control Single Component Management
The process of control unit, that is, train, by a Region control Single Component Management, seamlessly joins by another Region control unit
The process of management.Different from base station switching, base station switching is that Region control unit is independently cut according to train location information
Change, the intervention at a supreme layer-management center.And the order of Local handover is to send request by Region control unit, notify central authorities' control
Unit processed, central control unit is sent instruction after being coordinated with another Region control unit and carries out region switching.In addition, in same area
When base station in domain switches, the operating frequency at vehicle-mounted mobile station does not change, and the operating frequency of zones of different is different, car
Carry the work of movement station main frequency hopping.
Land mobile communication system adopts " soft " handing-over of radio areas.During Local handover, train first switch before mobile base station to
The operating frequency of transceiver is communicated with subsequent region, switches the work frequency to transceiver behind mobile base station after communication success again
Rate, thus " soft " handing-over in feasible region.
The Local handover of many trains is identical with the Local handover process of bicycle, and the communication of different trains is in different time-gap
Realize.Local handover process herein for bicycle is described.During Local handover, the forward direction of two vehicle-mounted mobile base stations and
Backward mobile transceiver will be communicated with the ground fixed base stations of zones of different, the data that therefore Region control unit receives
In, the data of forward and backward is by difference, and the moment that data arrives is likely to difference.
In addition, the base station of only one of which ring can be communicated with train in the bicyclic circuit in the base station of adjacent area, Gu Qu
The signal of the data only one of which base station loop that domain control unit receives, but because vehicle-mounted mobile station a and b is located at train respectively
Two ends, are divided into the wireless link of forward and backward both direction, therefore the monocyclic data of ground base station equally contains vehicle-mounted control
Unit a and the data of vehicular control unit b, the now redundancy minimizing half on circuit, Fig. 2 shows in the embodiment of the present invention
Local handover schematic diagram.
When train is forwarded between 1an the and 1bn base station of Region control unit 1, Region control unit 1 is controlled by central authorities
Unit sends the request of Local handover to Region control unit 2, when Region control unit 2 is that train on the horizon distributes one
Gap, to realize train-ground communication, issues broadcast data by the common time slot of 2an base station tdma.
When train is behind the 1bn base station of Region control unit 1, before the vehicle-mounted mobile station front end of headstock and the tailstock to
Antenna efficiency frequency is according to the order of Region control unit 1, and operating frequency is adjusted to by the table of frequency allocations recalling inside it
The operating frequency of Region control unit 2, starts to receive the signal of the 2an base station from Region control unit 2, receives this base station letter
Realize communicating with Region control 2 after number.
High ferro train behind the 2an base station of Region control 2, by the coordination of Region control 1 and Region control 2, train
Rearward-facing antenna also changes operating frequency, realizes the connection of wireless link with the base station of Region control 2, now Local handover process knot
Bundle.
Local handover process can be divided into handing-over to prepare, start to join and join to terminate three steps, implement process such as
Under:
(1) Local handover prepares
Train operation, to when between last a ring in region 1 and b ring group station, carries out the preparation before Local handover, area
The equipment in domain 2 does not form linkage with the equipment in region 1.Now, institute in the base station radio signal distributions such as Fig. 3 in region 1 and region 2
Show, Fig. 3 is base station signal scattergram before Local handover preparation.
Learn that train will enter Region control unit 2 by Region control unit 1 by the operation planning of central control unit, row
During certain position through between last a ring of Region control unit 1 and b ring group station of car, central control unit starting region is handed over
Connect, and assign preparation region handover command to Region control unit 1 and Region control unit 2, the row of Local handover will be carried out
Car id issues two Region control units.Now, the base station radio signal distributions of Region control unit 1 and Region control unit 2
In as shown in Figure 4, base station signal scattergram when Fig. 4 prepares for Local handover.
During Local handover, system preparation mainly has:
1st, whether the train that Region control unit 1 will carry out Local handover according to the instruction checking that central control unit issues
In one's respective area and its position, certain position between last a ring and b ring group station crossed by train, and Region control unit 1 notifies car
Carry the transmitting-receiving operating frequency of control unit subsequent region control unit and enter Local handover SBR, Region control unit 1
Local handover preparation is reported to complete to central control unit.
2nd, Region control unit 2 checks and reports the whether available free " RUN " train in one's respective area to central control unit
Tdma time slot can use.If it has, then send out on a ring at the edge that train will enter and b ring group station scooping out tdma signal, should
Signal sends in last common time slot of tdma, and reports Region control unit 2 to prepare region friendship to central control unit
It is connected into work(.If preparation does not complete, preparation is reported to join unsuccessfully and its reason to central control unit.
(2) start region handing-over
During certain predeterminated position in the overlapping coverage areas of Region control unit 1 and Region control unit 2 of train, central authorities
Control unit system start-up Local handover, as shown in Figure 5 in, base station signal scattergram when Fig. 5 joins for start region.
Central control unit passes through the instruction of 1 start region handing-over of Region control unit, and Region control unit 1 is according to fixed
After position data validation train have passed through predeterminated position, send start region handover command to vehicular control unit.Vehicle-mounted control list
The information sending to operating frequency the receiving area control unit 2 of transceiver before unit's switching mobile base station, extracts Region control
The broadcast message in the 16th time slot in the tdma frame structure that unit 2 sends, determines the time slot being communicated with subsequent region.This
When, Region control unit 1 is still communicated with the backward transceiver of train with last a ring and b ring group station.
Under normal circumstances, vehicular control unit can within the tdma frame period of 32ms with Region control unit 2 scoop out letter
Number it is successfully established communication link, vehicular control unit learns that train and Region control unit 2 set up meeting after good communication link
Status information is passed back Region control unit 1 and Region control unit 2, and reports central control unit.
After central control unit knows this information, follow the tracks of the position of train and the communication quality of communication link, when train leads to
After crossing first base station of Region control unit 2, send instructions down to Region control unit 1 and Region control unit 2 simultaneously simultaneously,
The backward base station switch operating frequency of train and Region control unit 2 is allowed to set up communication link, as shown in Figure 6, Fig. 6 is will
Complete base station signal scattergram during Local handover.
(3) Local handover terminates
Central control unit confirms that train, completely and after Region control unit 2 proper communication, makes Region control unit 1 release
It is the tdma time interval resource of train distribution, thus completing Local handover.
During Local handover, occur in a ring of Region control unit 1 and Region control unit 2 control and b ring group station
The situation that only one of which ring can be communicated with train, the data only one of which base station ring that therefore Region control unit receives
Signal, now system redundancy minimizing half.The base station range of enlarged region cross-connecting area is conducive to improving radio signal quality
Reliability with Local handover.
Accordingly, Fig. 7 also show the communication system during Local handover in the bullet train in the embodiment of the present invention,
Comprising: first area control unit, second area control unit, central control unit, wherein first area control unit and
Second area control unit is associated with bicyclic communication network, and each communication network has associated base station therewith, and this two lead to
Communication network is all simultaneously located on Along Railway, the base station cross-cutting distribution on different rings on falling curb line, Ji Yige area
Domain control unit is communicated by the base station that two loop networks are changed with two, and the base station on different rings is distributed across ferrum
On curb line, first area control unit is communicated by central control unit second area control unit.
In specific implementation process, first area control unit, for judging that bullet train will enter first area control
During latter two base station in the bicyclic communication network associated by unit, sending zone handovers request to central control unit；With
And second area control unit is obtained for bullet train assignment frequency based on region switching, and judge the car of bullet train
Whether carry movement station front end by last base station associated by the control unit of first area, judge the vehicle-mounted of bullet train
When last base station associated by the control unit of first area is passed through in movement station front end, the vehicle-mounted mobile station of bullet train is carried out
Frequency hopping works, and the operating frequency at vehicle-mounted mobile station is adjusted to second area control unit for bullet train institute assignment frequency
Rate；Central control unit, after being used for receiving region handover request, is sent instruction after being coordinated with second area control unit and carries out area
Domain switches.
In specific implementation process, second area control unit is used for as entering associated by second area control unit
Bullet train under base station is covered distributes a time slot, and using tdma technology by closing on the base of first area control unit
Stand and issue broadcast data.
In specific implementation process, first area control unit is used for real by gps alignment system or BEI-DOU position system
When obtain the positional information of vehicle-mounted mobile station front end, the positional information based on this vehicle-mounted mobile station front end and last base station
Compare in position；Whether first area control unit is passed through by the vehicle-mounted mobile station front end that comparison result judges bullet train
Last base station.
In specific implementation process, the vehicle-mounted mobile station front end that this first area control unit is used for judging bullet train leads to
When crossing last base station of first area control unit, change the operating frequency of vehicle-mounted mobile station front end；Judging bullet train
Vehicle-mounted mobile station front end pass through second area control unit associated by first base station when, change vehicle-mounted mobile station rear end work
Working frequency, described first base station closes on last base station of first area control unit.
In specific implementation process, after the vehicle-mounted mobile station of bullet train completes frequency hopping work, this central control unit is also
First area control unit is made to be released to the tdma time interval resource that bullet train is distributed for sending order.
To sum up, in conjunction with the bicyclic communication network architecture in car ground Data-Link overall plan, two Region control units are realized straight
Connect the handoff procedure consulting vehicle-mounted mobile station, without the intervention of upper level central control unit, during switching result is notified that
Centre control unit.Occur that only one of which ring can in the bicyclic communication network of Region control unit 1 and Region control unit 2 control
With situation about being communicated with train, the signal of the data only one of which base station ring that therefore Region control unit receives, it is now
System redundancy reduces half, and the base station range of enlarged region cross-connecting area is conducive to improving radio signal quality and Local handover
Reliability, based on combining of location technology and frequency hopping workflow, therefore all has abundance on signaling process and response time
Time response.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
Completed with the hardware instructing correlation by program, this program can be stored in a computer-readable recording medium, storage
Medium may include that read only memory (rom, read only memory), random access memory (ram, random
Access memory), disk or CD etc..
In addition, communication means during Local handover in the above bullet train that the embodiment of the present invention is provided and
System is described in detail, and specific case used herein is set forth to the principle of the present invention and embodiment, with
The explanation of upper embodiment is only intended to help and understands the method for the present invention and its core concept；General simultaneously for this area
Technical staff, according to the thought of the present invention, all will change in specific embodiments and applications, in sum,
This specification content should not be construed as limitation of the present invention.
Claims (10)
1. the communication means during the Local handover in a kind of bullet train is it is characterised in that comprise the steps:
First area control unit judges that bullet train will enter the bicyclic communication network associated by the control unit of first area
In latter two base station when, first area control unit sending zone handovers request to central control unit；
Central control unit is sent instruction after being coordinated with second area control unit and carries out region switching；
First area control unit is based on region switching and obtains second area control unit is bullet train assignment frequency；
Judge whether the vehicle-mounted mobile station front end of bullet train passes through last base station associated by the control unit of first area,
When last base station associated by the control unit of first area is passed through in the vehicle-mounted mobile station front end judging bullet train, at a high speed
The vehicle-mounted mobile station of train carries out frequency hopping work, and it is height that the operating frequency at vehicle-mounted mobile station is adjusted to second area control unit
Fast train institute assignment frequency.
2. the communication means during the Local handover in bullet train as claimed in claim 1 is it is characterised in that in described
Send instruction after the control unit and second area control unit coordination of centre and carry out region switching and include:
Second area control unit covered by the base station that will enter associated by second area control unit under bullet train
One time slot of distribution, and broadcast data is issued by closing on the base station of first area control unit using tdma technology.
3. the communication means during the Local handover in bullet train as claimed in claim 1 is it is characterised in that described sentence
Whether the vehicle-mounted mobile station front end of disconnected bullet train is included by last base station of first area control unit:
Obtain the positional information of vehicle-mounted mobile station front end by gps alignment system or BEI-DOU position system in real time；
Compare in the position of the positional information based on described vehicle-mounted mobile station front end and last base station；
By comparison result judge the vehicle-mounted mobile station front end of bullet train whether by first area control unit last
Base station.
4. the communication means during the Local handover in bullet train as claimed in claim 1 is it is characterised in that described height
The vehicle-mounted mobile station of fast train carries out frequency hopping work, the operating frequency at vehicle-mounted mobile station is adjusted to second area control unit and is
Bullet train institute assignment frequency includes:
When last base station of first area control unit is passed through in the vehicle-mounted mobile station front end judging bullet train, change vehicle-mounted
The operating frequency of movement station front end；
When the first base station associated by second area control unit is passed through in the vehicle-mounted mobile station front end judging bullet train, change
The operating frequency of vehicle-mounted mobile station rear end, described first base station closes on last base station of first area control unit.
5. the communication means during the Local handover in the bullet train as described in any one of Claims 1-4, its feature exists
In methods described also includes: after the vehicle-mounted mobile station of bullet train completes frequency hopping work, central control unit sends order and makes
First area control unit is released to the tdma time interval resource that bullet train is distributed.
6. the communication system during the Local handover in a kind of bullet train is it is characterised in that described system includes:
First area control unit, for judging that bullet train will enter the bicyclic communication associated by the control unit of first area
During latter two base station in network, sending zone handovers request to central control unit；And based on region switching acquisition the
Two Region control units are bullet train assignment frequency, and judge whether the vehicle-mounted mobile station front end of bullet train is passed through
Last base station associated by the control unit of first area, passes through the firstth area in the vehicle-mounted mobile station front end judging bullet train
During last base station associated by the control unit of domain, the vehicle-mounted mobile station of bullet train carries out frequency hopping work, by vehicle-mounted mobile
The operating frequency stood is adjusted to second area control unit for bullet train institute assignment frequency；
Central control unit, after being used for receiving region handover request, is sent instruction after being coordinated with second area control unit and carries out
Region switches.
7. the communication system during the Local handover in bullet train as claimed in claim 6 is it is characterised in that described
Bullet train under two Region control units are used for being covered by the base station that will enter associated by second area control unit divides
Join a time slot, and broadcast data is issued by closing on the base station of first area control unit using tdma technology.
8. the communication system during the Local handover in bullet train as claimed in claim 6 is it is characterised in that described
One Region control unit is used for obtaining the position of vehicle-mounted mobile station front end in real time by gps alignment system or BEI-DOU position system
Information, compares in the position of the positional information based on described vehicle-mounted mobile station front end and last base station；Tied by comparing
Fruit judges whether the vehicle-mounted mobile station front end of bullet train passes through last base station of first area control unit.
9. the communication system during the Local handover in bullet train as claimed in claim 6 is it is characterised in that described
One Region control unit be used for judge the vehicle-mounted mobile station front end of bullet train by first area control unit last
During base station, change the operating frequency of vehicle-mounted mobile station front end；Pass through the secondth area in the vehicle-mounted mobile station front end judging bullet train
During first base station associated by the control unit of domain, change the operating frequency of vehicle-mounted mobile station rear end, described first base station closes on the
One last base station of Region control unit.
10. the communication system during the Local handover in the bullet train as described in any one of claim 6 to 9, its feature
It is, after the vehicle-mounted mobile station of bullet train completes frequency hopping work, described central control unit is additionally operable to send order and makes the
One Region control unit is released to the tdma time interval resource that bullet train is distributed.
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