CN103457655B - The information transmission system and method - Google Patents
The information transmission system and method Download PDFInfo
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- CN103457655B CN103457655B CN201210169396.3A CN201210169396A CN103457655B CN 103457655 B CN103457655 B CN 103457655B CN 201210169396 A CN201210169396 A CN 201210169396A CN 103457655 B CN103457655 B CN 103457655B
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- information transmission
- transmission subsystem
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/005—Moving wireless networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention discloses a kind of information transmission system, including the first information transmission subsystem that is installed only at station and the second message transmission subsystem ON TRAINS is installed, the first information transmission subsystem is configured to set up at least one wireless connection when the train rests in the station with second message transmission subsystem, and the first information transmission subsystem is by the wireless connection to the second message transmission subsystem transmitting data information, and the first information transmission subsystem is also configured to disconnect at least one wireless connection when the train leaves the station with second message transmission subsystem.The invention also discloses a kind of information transferring method.Handling capacity between train and track side facility can be greatly improved by the information transmission system of the invention and method, high speed data transfer business is realized.
Description
Technical field
The present invention relates to wireless communication technology, more particularly to a kind of information transmission system and method.
Background technology
Compared with cable communicating technology, WLAN (WLAN) technology has element cost low, the advantages of easy for installation,
Therefore be widely used in subway system, be used to realize train control system and train and train in passenger information system with
Information transfer between the facility of train rail side.In current subway system, generally set wireless on the train of operation
Client, and access point (AP, Access Point) is set by the track of train operation, when train is advanced in orbit
Wait, the wireless client on train can set up wireless connection with the access point for setting in orbit, carry out information exchange, realize
To Train Control and realize the application of passenger information system.
It is known to complete simultaneously little to the information content of interaction required for the control of train in train control system, therefore, it is right
The requirement of the message transmission rate between access point and wireless client is not high, but, in order to realize passenger information system
Using particularly video traffic then needs have transmission rate higher between access point and wireless client.For example, when row
Train in entering to passenger's displaying video programs when, access point needs to be transmitted to wireless client in a short time substantial amounts of
Video data, especially, if the video frequency program played is high sharpness video program, at least needs 12Mbps (megabit every
Second) transmission bandwidth could meet requirement.This requires to be needed between access point and wireless client using the nothing of high-throughput
Line transmission technology.However, existing Radio Transmission Technology is difficult to meet the requirement of above-mentioned traffic rate high, for example, using WLAN
802.11g technologies when, even if signal intensity it is sufficiently strong and not by any interference ideally, one is wirelessly connected on
The handling capacity limit of application layer can be only achieved 24Mbps, and under real applied environment, due to from other radio communications
The interference of system be inevitable and also signal intensity do not reach yet it is sufficiently strong, therefore between access point and wireless client
Handling capacity does not reach the limit of above-mentioned handling capacity much.Even if access point and wireless client are maintained static, access point and nothing
Handling capacity between line client also at most can only achieve about 10Mbps, and this handling capacity can not support high definition video
The transmission of program.And, when train is in the case of quick movement, because wireless client needs often frequency between access points
Switch numerously, then can cause the further reduction of handling capacity between access point and wireless client.
The content of the invention
In order to solve the above problems, the present invention proposes a kind of information transmission system and a kind of information transferring method, can be with
The data transmission service of high speed is provided for station and train.
The information transmission system described in one embodiment of the invention, including a plurality of first information transmission subsystems and extremely
Few second message transmission subsystem installed ON TRAINS, wherein a plurality of first information transmission subsystems are only pacified respectively
Mounted at least two for the train stop stations at and each station be provided with least one first information transmission subsystem
System, the first information transmission subsystem is configured to when the train rests in the station with second message transmission subsystem
Set up at least one wireless connection, and the first information transmission subsystem by the wireless connection to second information transfer
Subsystem transmitting data information, and the first information transmission subsystem is also configured to work as institute with second message transmission subsystem
State and at least one wireless connection is disconnected when train leaves the station.
Further, in a preferred embodiment, the information transmission system further includes control centre, is configured to really
The first information transmission subsystem of the Dingan County at each described station needs the data message of transmission and sends extremely
The corresponding first information transmission subsystem.According to first letter at the one of place installed at least two station
Cease the feedback information of transmission subsystem and adjust the first information transmission subsystem data message to be transmitted at other stations.
Further, the first information transmission subsystem includes the first control device and at least one access point, described
Second message transmission subsystem includes the second control device and at least one wireless client.Wherein, described at least one connect
Access point and at least one client are configured to when the train rests in the station one described access point with one
The client sets up the wireless connection, and at least one access point and corresponding at least one wireless client are also
It is configured to disconnect the wireless connection when the train leaves the station.
Further, the first information transmission subsystem includes at least two described access points, and first control
Equipment is configured to be divided into the message part with the access point respective amount to pass through described access point respectively by the data message
Send to the corresponding wireless client, wherein, the second message transmission subsystem includes at least two wireless clients, and
The message part that each described client is received is merged into and passed by the first information transmission subsystem by the second control device
The defeated data message.
Another aspect of the present invention, there is provided a kind of method of information transfer, between train and its station stopped
Transmission information, wherein the train stops station described at least two, the method includes：When the train stops the station
When, set up between the second message transmission subsystem in a plurality of first information transmission subsystems and on the train to
A few wireless connection, wherein a plurality of first information transmission subsystems are only separately mounted at least two station
And each station is provided with least one first information transmission subsystem；Passed from the first information by the wireless connection
Defeated subsystem is to the second message transmission subsystem transfer data information；And disconnected when the train leaves the station
At least one wireless connection.
Further, in one embodiment, it is described by the wireless connection from the first information transmission subsystem
Transfer data information includes and second message transmission subsystem between：It is determined that at station each described described
One message transmission subsystem needs the data message of transmission and sends to the corresponding first information transmission subsystem.Enter
One step, feedback information according to the first information transmission subsystem at a station installed therein and adjust other cars
The first information transmission subsystem data message to be transmitted at the place of station.
Further, it is described a plurality of first information transmission subsystems be arranged on the train on the second information transfer
At least one wireless connection is set up between subsystem to be included：The first information transmission subsystem at least one access point with
At least one wireless connection, Yi Jiqi are set up between at least one wireless client of second message transmission subsystem
Described in disconnect at least one wireless connection and include disconnecting between at least one access point and corresponding wireless client
The wireless connection set up.
Further, the first information transmission subsystem passes through two or more with second message transmission subsystem
Access point and wireless client set up the corresponding two or more wireless connections, wherein described be wirelessly connected on by described
Transfer data information includes between the first information transmission subsystem and second message transmission subsystem：By the data
Information is divided into the message part of the wireless connection respective amount to be sent to corresponding described by described access point respectively
Wireless client；And merge into by first information transmission this described the described information part that each described client is received
The data message of system transfers.
A kind of another aspect of the present invention, there is provided storage medium of machine readable, stores for performing above- mentioned information transmission
Method instruction.
A kind of another aspect of the invention, there is provided computer program, holds when the computer program is run in a machine
The method of row above- mentioned information transmission.
The present invention by train inlet parking first information transmission subsystem and the second message transmission subsystem it
Between set up at least one wireless connection, transmission rate higher can be obtained, so that for station and train provide high-speed data biography
Defeated business.
Brief description of the drawings
Fig. 1 is the internal structure schematic diagram of the information transmission system described in the embodiment of the present invention；
Fig. 2 is the structural representation of the first information transmission subsystem described in the embodiment of the present invention；
Fig. 3 is the structural representation of the second message transmission subsystem described in the embodiment of the present invention；
Fig. 4 is the flow chart of the information transferring method described in the embodiment of the present invention；
Specific embodiment
Fig. 1 shows one embodiment of the invention, a kind of information transmission system 100, is realized between train and station
High speed data transfer business.
The information transmission system 100 includes：It is a plurality of be installed only at train stop at station the first information transmission son
System 200 and installation the second message transmission subsystem 300 ON TRAINS, wherein, when train stops station, the first information
The message transmission subsystem 300 of transmission subsystem 200 and second sets up at least one wireless connection 400, first information transmission subsystem
System 200 pass through at least one set up wireless connection 400 transmitted to the second message transmission subsystem need to be sent to this second
The data message of message transmission subsystem, such as video program data or high sharpness video program data etc..Art technology
Personnel it is generally known that, although the present invention in, it is therefore an objective to sent out from first information transmission subsystem to the second message transmission subsystem
Send data, however according to data transfer the need for, the second message transmission subsystem also sends phase to first information transmission subsystem
Close data, it may for example comprise but be not limited to, response message etc..Further, when train leaves station, first information transmission subsystem
System 200 and the second message transmission subsystem 300 disconnect at least one set up wireless connection 400, stop the biography of data message
It is defeated.
A plurality of first information transmission subsystems can be arranged at two or more stations, and each station can mount to
A few first information transmission subsystem.So, above- mentioned information Transmission system 100 will also be including for controlling multiple first to transmit
The control centre 500 of subsystem 200, the number for determining to need the transmission of first information transmission subsystem 200 in each station
It is believed that breath, and the data message for needing the first information transmission subsystem 200 in each station to transmit is distributed to each station
Interior first information transmission subsystem 200.In one example, each station is provided with the first information transmission of equal number
System.In another example, the first information transmission subsystem of varying number is installed at each station.Preferably, for installing and make
With convenient consideration, a first information transmission subsystem is installed at each station.
In one embodiment, can be sent to respective data message installed in each in advance by the control centre 500
First information transmission subsystem 200 at station.When train rests in each station, the first information transmission on the station
Subsystem 200 will be by corresponding data information transfer to second message transmission subsystem 300.The deployment of control centre 500
Position can determine according to concrete application, as long as row data communication can be entered with each first information transmission subsystem.
Also, the control centre 500 can also be according to the anti-of the first information transmission subsystem at one of station
Feedforward information and adjust the first information transmission subsystem at other stations transmission data message.For example, when train is in current vehicle
Stand parking when, if all data messages waiting for transmission are not sent to the second information by first information transmission subsystem 200 passed
Defeated subsystem 300, then can notify that control centre 500, control centre 500 will adjust data message with send feedback information, from
And the part do not transmitted is transferred to the second information in train by the first transmission subsystem 200 of the next stop when the station is stopped
Transmission subsystem 300.
In order to realize wireless transmission function, the first information transmission subsystem 200 is including first control device and extremely
A few access point, wherein system 200 can correspond to each access point and be respectively equipped with a buffer memory device.The above-mentioned first information is passed
200 1 examples of defeated subsystem are as shown in Fig. 2 including the first control device 201, multiple buffer memory devices 202 and multiple accesses
Point 203, wherein, the plurality of buffer memory device 202 connects one to one with the plurality of access point 203 respectively.Or, at another
In example, buffer memory device 202 can be integrated with access point 203.
Correspondingly, second message transmission subsystem 300 includes second control device and at least one wireless visitor
Family end, the wherein system 300 can correspond to each wireless client and be respectively equipped with a buffer memory device.Above-mentioned second information transfer
One example of system 300 is as shown in figure 3, including multiple wireless clients 301, correspondence multiple buffer memory device 302 and second
Control device 303, wherein, the plurality of wireless client 301 connects one to one with the plurality of buffer memory device 302 respectively.Or,
In a further embodiment, buffer memory device 302 can be integrated with wireless client 301.
When train is stopped AT STATION, each access point 203 of first information transmission subsystem 200 respectively with the second information
The corresponding wireless client 301 of transmission subsystem 300 sets up wireless connection 400, then, each corresponding caching of access point 203
Data message in equipment is sent in the corresponding buffer memory device of respective wireless client 301 by wireless connection.And in train
When leaving the station, access point 203 disconnects set up wireless connection 400 with corresponding wireless client 301 respectively, so that
The transmission of Stop message.
Specifically, the first information transmission subsystem 200 is needed the data for sending to believe by above-mentioned first control device 201
Breath is divided into the message part with access point respective amount, and it is corresponding that these message parts are buffered in into corresponding access point respectively
In buffer memory device 202.These access points 203 can be installed near the stop position of train, for example, be arranged separately in station
Track side.After wireless connection, respective message part is sent to corresponding wireless client 301 by access point.
Accordingly, the wireless client 301 is arranged on train, for example, can be distributed along train length.As described above,
When train stops station, wireless client 301 sets up wireless connection respectively with corresponding access point 203.Wireless client 301
The message part of the correspondence access point 203 transmission is received, and the message part that will be received is cached to each self-corresponding caching and set
In standby 302.The message part that each wireless client 301 is received is merged into the first information by above-mentioned second control device 303
The data message that transmission subsystem 200 is transmitted.Then, the data message by the communication device transfers in train on train
Passenger information system.
By above- mentioned information Transmission system, substantial amounts of data (such as one section video program data more long) are segmented into many
Individual part, and when train stops each station, one or more are partially transferred in the communicator of train, then will obtain
Data is activation to the passenger information system on train, the video frequency program of caching is for example played to the passenger on train.So, no
Real-time transmission data is needed, such that it is able to use data transfer bandwidth conventional at present.
Fig. 4 shows another embodiment of the present invention, a kind of information transferring method 500, and it utilizes above- mentioned information Transmission system
100 between train and station transmission information, including：
Step 510, when train stops station, the first information transmission subsystem 200 and the second information transfer subsystem
System 300 sets up at least one wireless connection 400；
Step 520, first information transmission subsystem 200 is passed by the wireless connection 400 to the second message transmission subsystem
Transmission of data information, such as video program data or high sharpness video program data etc.；
Step 530, the wireless connection is disconnected when train leaves station, i.e. disconnected between access point and wireless client
Wireless connection.
In the above-mentioned methods, step 510 further includes that first information transmission subsystem 200 at least one is accessed by it
203 at least one wireless client 301 respectively with second message transmission subsystem 300 of point sets up at least one wireless connection
400.In one embodiment, using multiple access points multiple wireless connection corresponding with multiple wireless client foundation.
Above-mentioned steps 520 are further included：When at least two station settings first information transmission subsystem, it is determined that
First information transmission subsystem installed in each station needs the data message of transmission and is sent to corresponding first information biography
Defeated subsystem.Further, the feedback information of the first information transmission subsystem at a station installed therein and adjust
Save the first information transmission subsystem data message to be transmitted at other stations.
Step 520 also includes：When multiple access points multiple wireless connection corresponding to multiple wireless client foundation, by number
It is believed that breath is divided into the message part with the wireless connection respective amount set up, and these message parts are passed through into corresponding access point
Transmitted to wireless client via wireless connection, and the message part that each wireless client is received is merged into the data
Information, i.e., reduce the data message in second message transmission subsystem.
It should be noted that in order to reduce the interference between multiple wireless connections, can be for the distribution of each wireless connection not
Same frequency range, bandwidth is reduced by rationalizing the frequency shared by the multiple wireless connections of distribution；Or using high-gain orientation
Antenna reduces the interference between multiple wireless connections.Additionally, above-mentioned multiple wireless connections can be wirelessly transferred using identical
Technology can also use different Radio Transmission Technologys.Described buffer memory device can use existing any appropriate device,
And each buffer memory device can be with identical or different.
Data transmission system and method described in the present embodiment can be seen that due in the present embodiment, wireless connection
Only just begun setting up when Train Stopping and disconnected when launch train runs, that is, in the foundation of wireless connection
During disconnection, access point and wireless client are all fixed, therefore the wireless connection set up is more stable,
Transmission rate higher can be obtained.
Additionally, in the present embodiment, when between the message transmission subsystem 300 of first information transmission subsystem 200 and second
When setting up at least one (particularly two or more) wireless connection, can be obtained total handling capacity will be single wireless connection
The several times of handling capacity, therefore it is easily met the requirement of video program data or hdtv video data to transmission bandwidth.Also,
The Transmission system and method that the present embodiment is provided are highly susceptible to extension, can very easily meet miscellaneous service to transmission rate
Requirement.
Furthermore, in the present embodiment, first information transmission subsystem is installed and located AT STATION, rather than installed in whole train
Track on, therefore, the infrastructure of the whole information transmission system (for example access point to be mounted and to be laid
Cable etc.) cost and installation, operation and safeguard expense be also limited.Or, embodiments of the invention can also with
The equipment for train data transmission having is combined, wherein as it was previously stated, this existing equipment is arranged along train rail.This
Sample, it is possible to use existing equipment is supplemented as system of the invention.For example, being rested in train using system of the invention
During station, transmission is a large amount of, non-real-time information, while in train travelling process, being counted on a small quantity, in real time using existing system transfers
According to.
Finally, due to first information transmission subsystem 200 substantial amounts of is sent to second by need access point 203 to send
The information of message transmission subsystem is divided into multiple message parts and is buffered in respectively in multiple buffer memory devices 202, and by many
Individual wireless connection 400 is sent to the second message transmission subsystem 300；And in the second message transmission subsystem 300, by wireless visitor
Multiple message parts that family end 301 receives also are buffered in multiple buffer memory devices 302 respectively, and the mode of this parallel memorizing also can
The requirement to the read or write speed and memory capacity of single buffer memory device is substantially reduced, therefore, deposited using cheap solid-state
Storage media, such as flash memory, it is also possible.Therefore, business need can met using the system and method for the present embodiment
Under the conditions of substantially reduce the cost of system.
It is further to note that although above-described embodiment illustrates by taking subway system as an example, the present embodiment institute
The information transmission system and method for description can also be applied in other systems similar with subway system, and are not limited to subway system
System.In this case, the second information subsystem is arranged on movement physically, and first information transmission subsystem is installed
In fixed position, when on the position where mobile entity rests in first information transmission subsystem, first information transmission
Subsystem and the second message transmission subsystem set up at least one wireless connection and start data transfer；And when mobile entity from
During position where opening first information transmission subsystem, first information transmission subsystem and the second message transmission subsystem disconnect institute
At least one wireless connection set up, stops data transfer.
Present invention also offers a kind of storage medium of machine readable, store as described herein for performing a machine
The instruction of information transferring method.Specifically, system or device equipped with storage medium can be provided, is deposited on the storage medium
The software program code of the function of realizing any embodiment in above-described embodiment is stored up, and makes the computer of the system or device
(or CPU or MPU) reads and performs program code of the storage in storage medium.
In this case, from storage medium read program code in itself be capable of achieving above-described embodiment in any one reality
The function of example is applied, therefore the storage medium of program code and store program codes constitutes a part of the invention.
For provide program code storage medium embodiment include floppy disk, hard disk, magneto-optic disk, CD (such as CD-ROM,
CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), tape, Nonvolatile memory card and ROM.Selectively,
Can by communication network from server computer download program code.
Further, it should be apparent that, by performing the program code read-out by computer, and be able to can not only pass through
Instruction based on program code makes operating system of calculating hands- operation etc. to complete partly or completely practical operation, so that
Realize the function of any one embodiment in above-described embodiment.
Further, it is to be appreciated that the program code read by storage medium is write into the expansion board in insertion computer
In in set memory or write the memory set in the expanding element being connected with computer, be subsequently based on journey
The instruction of sequence code makes CPU being arranged on expansion board or expanding element etc. come executable portion and whole practical operations, so that
Realize the function of any embodiment in above-described embodiment.
Claims (9)
1. a kind of information transmission system, it is characterised in that the information transmission system includes a plurality of first information transmission subsystems
And at least one install the second message transmission subsystem ON TRAINS, wherein a plurality of first information transmission subsystems only
It is separately mounted at least two stations stopped for the train, each station is provided with least one first information transmission
System,
The first information transmission subsystem includes the first control device and at least two access points；
Second message transmission subsystem includes the second control device and at least two wireless clients；
Wherein, at least two access point is configured to rest in the station when the train with least two client
When one described access point set up the wireless connection with a client, the first information transmission subsystem passes through institute
State wireless connection to the second message transmission subsystem transmitting data information and at least two access point with it is corresponding extremely
Few two wireless clients are also configured to disconnect the wireless connection when the train leaves the station；
Wherein, first control device be configured to by the data message be divided into should number of access point message part with
Sent to the corresponding wireless client by described access point respectively, second control device is by each client
The message part for receiving merges into the data message transmitted by the first information transmission subsystem.
2. the information transmission system according to claim 1, it is characterised in that the information transmission system further includes control
Center, is configured to determine that the first information transmission subsystem at each described station needs the data of transmission
Information is simultaneously sent to the corresponding first information transmission subsystem.
3. the information transmission system according to claim 2, it is characterised in that the control centre is further configured for according to peace
Other cars are adjusted mounted in the feedback information of the first information transmission subsystem at one of place at least two station
The first information transmission subsystem data message to be transmitted at the place of station.
4. the information transmission system as claimed in claim 1, it is characterised in that also include：
The first buffer memory device connected one to one with least two access point；And
The second buffer memory device connected one to one with least two client；
Wherein, first and second buffer memory device is used to store described information part.
5. a kind of method of information transfer, for the transmission information between train and its station stopped, wherein the train stops
By station described at least two, it is characterised in that the method includes：
When the train stops each described station, in a plurality of first information transmission subsystems and on the train
The second message transmission subsystem between set up at least two wireless connections, wherein a plurality of first information transmission subsystems
Only it is separately mounted at least two station and each station is provided with least one first information transmission subsystem；
Data message is divided into the message part with the wireless connection respective amount, to meet two or two by described respectively
Wireless connection more than individual sends to second message transmission subsystem these message parts；And
Merge into and passed by first information transmission subsystem this described in the described information part that will be received through wireless connection each described
The defeated data message；And
At least two wireless connection is disconnected when the train leaves the station.
6. method according to claim 5, it is characterised in that described to be passed from the first information by the wireless connection
Defeated subsystem transmits the data message and further includes to second message transmission subsystem：It is determined that being arranged on described in each
The first information transmission subsystem at station needs the data message of transmission and sends to corresponding first letter
Breath transmission subsystem.
7. the method according to claim 5 or 6, it is characterised in that it is described a plurality of first information transmission subsystems with
Setting up at least two wireless connections between the second message transmission subsystem on the train includes：In the described first letter
Cease transmission subsystem two or more access points respectively with second message transmission subsystem two or more
Wireless client between set up at least two wireless connection, and wherein described disconnect at least two wireless connection
Including disconnecting the wireless connection set up between described two or more than two access points and corresponding wireless client.
8. method according to claim 5, it is characterised in that according at a station installed therein this first
The feedback information of message transmission subsystem and adjust the data to be transmitted of first information transmission subsystem at other stations
Information.
9. method as claimed in claim 5, it is characterised in that also include：
The multiple message parts for being sent to the second message transmission subsystem are buffered in and at least two access point one respectively
In multiple first buffer memory devices of one correspondence connection；
Multiple message parts that at least two client is received are buffered in at least two client one by one respectively
In multiple second buffer memory devices of correspondence connection.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210169396.3A CN103457655B (en) | 2012-05-28 | 2012-05-28 | The information transmission system and method |
| PCT/EP2013/059453 WO2013178440A1 (en) | 2012-05-28 | 2013-05-07 | Information transmission system and method installed on a train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210169396.3A CN103457655B (en) | 2012-05-28 | 2012-05-28 | The information transmission system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103457655A CN103457655A (en) | 2013-12-18 |
| CN103457655B true CN103457655B (en) | 2017-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210169396.3A Expired - Fee Related CN103457655B (en) | 2012-05-28 | 2012-05-28 | The information transmission system and method |
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| CN (1) | CN103457655B (en) |
| WO (1) | WO2013178440A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2519561A (en) * | 2013-10-24 | 2015-04-29 | Vodafone Ip Licensing Ltd | Increasing cellular communication data throughput |
| EP3104636B8 (en) * | 2015-06-12 | 2021-12-29 | ALSTOM Transport Technologies | Improved wifi communication system for the exchange of data between a railway vehicle and a ground terminal |
| CN108667848B (en) * | 2018-05-21 | 2020-03-31 | 南京大学 | System for caching, transcoding and transmitting video by using vehicle-mounted AP (access point) and working method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1842036A (en) * | 2005-03-28 | 2006-10-04 | 神州亿品科技有限公司 | Distributed multimedia information dissemination system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6937665B1 (en) * | 1999-04-19 | 2005-08-30 | Interuniversitaire Micron Elektronica Centrum | Method and apparatus for multi-user transmission |
| JP2006074477A (en) * | 2004-09-02 | 2006-03-16 | Pioneer Electronic Corp | Terminal device for communication, method for changing function setting of terminal device for communication and its program |
| FR2926427B1 (en) * | 2008-01-16 | 2012-12-28 | Alstom Transport Sa | IP COMMUNICATION ARCHITECTURE BETWEEN SOIL AND A VEHICLE |
| EP2129079A1 (en) * | 2008-05-29 | 2009-12-02 | Vodtec BVBA | An on-board module and associated method for delivery of content |
| US20110230197A1 (en) * | 2010-03-22 | 2011-09-22 | Shiquan Wu | System and apparatus for high speed train communication |
| CN101791989A (en) * | 2010-03-31 | 2010-08-04 | 上海磁浮交通发展有限公司 | Traffic information network architecture system of self-controlling dispersion track |
| CN102404364A (en) * | 2010-09-14 | 2012-04-04 | 深圳市思科泰技术有限公司 | Cab signal wireless transmission system and method |
| US8681839B2 (en) * | 2010-10-27 | 2014-03-25 | International Business Machines Corporation | Calibration of multiple parallel data communications lines for high skew conditions |
-
2012
- 2012-05-28 CN CN201210169396.3A patent/CN103457655B/en not_active Expired - Fee Related
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2013
- 2013-05-07 WO PCT/EP2013/059453 patent/WO2013178440A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1842036A (en) * | 2005-03-28 | 2006-10-04 | 神州亿品科技有限公司 | Distributed multimedia information dissemination system |
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| Publication number | Publication date |
|---|---|
| CN103457655A (en) | 2013-12-18 |
| WO2013178440A1 (en) | 2013-12-05 |
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