CN102316472A - Vehicle access method based on long term evolution (LTE) and system thereof - Google Patents
Vehicle access method based on long term evolution (LTE) and system thereof Download PDFInfo
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Abstract
The invention provides a vehicle access method based on long term evolution (LTE) and a system thereof. The system of the invention comprises: a vehicle base station, a vehicle LTE transceiver unit and a vehicle microwave transceiver unit. The method of the invention comprises an uplink access process and a downlink access process. The uplink access process is characterized in that: the vehicle base station receives a wireless signal in a compartment; the signal is converted into uplink data after being processed; and the uplink data is converted into an uplink LTE standard signal after being processed by an LTE standard; then, the uplink LTE standard signal is modulated into an uplink microwave signal and is sent out. The downlink access process is characterized in that: after receiving a downlink microwave signal, the vehicle microwave transceiver unit converts the downlink microwave signal into a downlink LTE standard signal; the downlink LTE standard signal is converted into downlink data after being processed by the LTE standard; and then the downlink data is converted into a downlink wireless signal after being processed by the vehicle base station and is sent to user equipment. In the method and system, a microwave technology is used so that interference of a frequency of the vehicle base station to cochannel cells along railway can be effectively avoided. Antennas are short, which is beneficial to traffic safety and train installation.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly a kind of vehicle-mounted cut-in method and a kind of vehicle-mounted connecting system based on LTE based on LTE.
Background technology
In the mobile communications network, no matter be 2G or 3G, under the situation that adopts traditional coverage mode, to business such as the access that is in the mobile subscriber in the high-speed motion and conversations good service can not be provided, this point is particularly evident on high ferro.The climax of building along with Chinese high ferro arrives, and the scale of high-speed railway network is increasing, and train running speed can be more and more faster.
Be accompanied by the raising of the high ferro speed of service; The seal of high ferro railway car also improves thereupon; Train adopts the totally enclosed type body construction; Glass has also adopted metal coating glass, thereby causes the car body penetration loss to increase substantially, and the signal strength signal intensity that mobile phone receives in the compartment is significantly decay thereupon also.And along with the speed of service of high ferro train from 300 kilometers/hour to 400 kilometers/hour even 500 kilometers/hour; The lifting of speed causes the user frequently to be switched, when switching, also can cause a large amount of signaling transmission at network side; Cause so-called signaling storm; Thereby the problem that the user connects, handover success rate reduces occurs, the user experiences variation.
In order to solve the problem of above-mentioned high ferro communication; Stable, broadband and communication service reliably are provided between the car ground; There is company to propose (Long Term Evolution based on LTE; Long Term Evolution) high-speed railway LTE cell on wheels scheme is to realize HRC (High-Speed Railway Communication, high-speed railway communication) end-to-end solution.Through using the state-of-the-art LTE of present industry technology, with HRC Vehicle mounted station allocating antenna in the compartment outer end, in the compartment, Vehicle mounted station converges, distributes Abis, the Iub interface data of vehicle-mounted 2G/3G base station equipment; High ferro passenger inserts the 2G/3G network through integrated access equipment in the compartment, in train travelling process, does not only have car body loss problem, does not also have the minizone to switch, and does not more exist the crowd to move the signaling storm problem that causes.
But still have a problem when adopting said method, promptly when high ferro fast through out-of-date, the frequency that the frequency of cell on wheels can be to other macro base stations, especially be near the macro base station the station, city is brought interference, increases the network planning design difficulty of high ferro networking.And because the high-speed cruising of train, also increasingly high to the requirement of the size of top antenna, antenna size is big more, and windage also can be big more during high-speed motion, causes train when high-speed motion, to have bigger potential safety hazard.
Summary of the invention
To the problem that exists in the above-mentioned prior art, the object of the present invention is to provide a kind of vehicle-mounted cut-in method and system based on LTE, the frequency that can effectively solve cell on wheels is to the interference of railway co-frequency cell on the way and the problem of traffic safety.
A kind of vehicle-mounted cut-in method based on LTE comprises up access procedure and descending access procedure;
Said up access procedure may further comprise the steps: cell on wheels receives the up-link wireless signal in the compartment; Become upstream data after the processing; After the LTE standard is handled, converting up LTE standard signal to, is up microwave signal and outwards transmission by vehicle-mounted microwave transmitting and receiving cells modulate then;
Said descending access procedure may further comprise the steps: vehicle-mounted microwave transmitting and receiving unit converts thereof into descending LTE standard signal after receiving descending microwave signal; After the LTE standard is handled, become downlink data, become downstream wireless signals and send to subscriber equipment after handling by cell on wheels then.
A kind of vehicle-mounted connecting system based on LTE comprises:
Cell on wheels is used to receive the up-link wireless signal in the compartment, becomes upstream data after the processing and sends to vehicle-mounted LTE Transmit-Receive Unit; And receive the downlink data that said vehicle-mounted LTE Transmit-Receive Unit sends over, become downstream wireless signals after the processing and send to subscriber equipment;
Vehicle-mounted LTE Transmit-Receive Unit is used to receive said upstream data, after the LTE standard is handled, converts up LTE standard signal to and sends to vehicle-mounted microwave transmitting and receiving unit; And the descending LTE standard signal behind the receiving demodulation, after the LTE standard is handled, become downlink data and send to said cell on wheels;
Vehicle-mounted microwave transmitting and receiving unit is used to receive said up LTE standard signal, is modulated to after the up microwave signal outwards to send; And receive descending microwave signal, send to said vehicle-mounted LTE Transmit-Receive Unit after being demodulated to descending LTE standard signal.
Can find out from above scheme; Vehicle-mounted cut-in method and system based on LTE of the present invention; Owing to utilized microwave as wireless signal transmission; When high ferro or other equipment that use native system during fast through the somewhere, the frequency of cell on wheels can not brought interference to the frequency of other macro base stations (near the especially macro base station the railway station), has greatly reduced the network planning design difficulty of high ferro networking; And because the frequency of microwave is high, so the antenna size than traditional LTE frequency range is little on the size design of top antenna, the windage when having reduced the train high-speed cruising, the fail safe that has improved bullet train also helps train and installs.
Description of drawings
Fig. 1 is the vehicle-mounted cut-in method schematic flow sheet that the present invention is based on LTE;
Fig. 2 is the structural representation that the present invention is based on the vehicle-mounted connecting system of LTE;
Fig. 3 is the structural representation based on the vehicle-mounted connecting system of LTE among the embodiment three;
Fig. 4 is the structural representation of the little base station access system of vehicle multi-mode among the embodiment three;
Fig. 5 is the sketch map that is connected of vehicle-mounted LTE Transmit-Receive Unit and other equipment among the embodiment three;
Fig. 6 is the structural representation of the microwave transmission subsystem among the embodiment three;
Fig. 7 is the structural representation of the roadbed receiving subsystem among the embodiment three.
Embodiment
The invention provides a kind of vehicle-mounted cut-in method and system based on LTE, the frequency interferences that causes owing to the train fast moving during the solution tradition covers and the problem of traffic safety are mainly used on the high ferro of high-speed mobile.Below set forth in detail based on the vehicle-mounted cut-in method of LTE and the specific embodiment of system to of the present invention.
Embodiment one
As shown in Figure 1, the vehicle-mounted cut-in method based on LTE of the present invention comprises up access procedure and descending access procedure;
Up access procedure may further comprise the steps: ON TRAINS; Cell on wheels receives the up-link wireless signal in the compartment; Becoming upstream data after the processing, after the LTE standard is handled, convert up LTE standard signal to, is up microwave signal and outwards transmission by vehicle-mounted microwave transmitting and receiving cells modulate then;
Descending access procedure may further comprise the steps: vehicle-mounted microwave transmitting and receiving unit converts thereof into descending LTE standard signal after receiving descending microwave signal; After the LTE standard is handled, become downlink data, become downstream wireless signals and send to subscriber equipment after handling by cell on wheels then.
In addition; In the said up access procedure; After said vehicle-mounted microwave transmitting and receiving unit is modulated to said up LTE standard signal up microwave signal and outwards sends, can also comprise step: after roadbed microwave transmitting and receiving unit received said up microwave signal, whether the intensity of judging said up microwave signal was greater than preset threshold value; If then said up microwave signal is demodulated to up LTE standard signal, after the LTE standard is handled, becomes upstream data and send to core net then; And
In the said descending access procedure; Before said vehicle-mounted microwave transmitting and receiving unit receives said descending microwave signal; Can also comprise step: receive the downlink data in the core net; After the LTE standard is handled, convert descending LTE standard signal to, become descending microwave signal by roadbed microwave transmitting and receiving cells modulate then and send to said vehicle-mounted microwave transmitting and receiving unit.
The process that above-mentioned LTE standard is handled specifically comprises: modulation, demodulation, encapsulation, decapsulation, error handling processing, re-transmission, scheduling etc.
As an embodiment preferably, when transfer of data, can above-mentioned up LTE standard signal, descending LTE standard signal be adjusted to intermediate-freuqncy signal with convenient transmission.
Of the present invention based on the wireless signal that receives and transmit in the vehicle-mounted cut-in method of LTE; Can comprise any one or combination in any in the wireless signal of wireless signal and WLAN standard of wireless signal, WCDMA standard of wireless signal, the LTE standard of wireless signal, the TD standard of GSM standard, realize that multimode truly covers.
Preferably, microwave signal frequency range of the present invention is 6GHz～23GHz.
Embodiment two
Corresponding with the vehicle-mounted cut-in method based on LTE of the present invention, the present invention also provides a kind of vehicle-mounted connecting system based on LTE, and is as shown in Figure 2, comprising:
Cell on wheels is used at up direction, receives the up-link wireless signal in the compartment, becomes upstream data after the processing and sends to vehicle-mounted LTE Transmit-Receive Unit (can send through Iub interface); And, receive the downlink data that vehicle-mounted LTE Transmit-Receive Unit sends at down direction, become downstream wireless signals after the processing and send to subscriber equipment;
Vehicle-mounted microwave transmitting and receiving unit is used to receive said up LTE standard signal, is modulated to after the up microwave signal outwards to send; And receive descending microwave signal, send to said vehicle-mounted LTE Transmit-Receive Unit after being demodulated to descending LTE standard signal.
Vehicle-mounted LTE Transmit-Receive Unit is used at up direction, receives the upstream data that said cell on wheels sends, and after the LTE standard is handled, converts up LTE standard signal to and sends to vehicle-mounted microwave transmitting and receiving unit; And, receive the descending LTE standard signal after the demodulation that vehicle-mounted microwave transmitting and receiving unit sends at down direction, after the LTE standard is handled, become downlink data and send to said cell on wheels;
Vehicle-mounted microwave transmitting and receiving unit is used at up direction, receives the up LTE standard signal that vehicle-mounted LTE Transmit-Receive Unit sends, and outwards sends after being modulated to up microwave signal; And, receive descending microwave signal at down direction, send to said vehicle-mounted LTE Transmit-Receive Unit after being demodulated to descending LTE standard signal.
As an embodiment preferably, as shown in Figure 3, the vehicle-mounted connecting system based on LTE of the present invention can also comprise:
At least one roadbed microwave transmitting and receiving unit; Be used at up direction; Receive the up microwave signal that vehicle-mounted microwave transmitting and receiving unit sends; Whether the intensity of judging said up microwave signal is greater than preset threshold value, if then said up microwave signal is demodulated to up LTE standard signal and sends to LTE ENodeB unit; Then close return path (the roadbed microwave transmitting and receiving unit that can from a plurality of roadbed microwave transmitting and receivings unit, select an optimum through the step of above-mentioned judgement carries out transfer of data, and when downlink transfer, also uses this roadbed microwave transmitting and receiving unit) if not; And, receive the descending LTE standard signal in the LTE EnodeB unit at down direction, send to said vehicle-mounted microwave transmitting and receiving unit after being modulated into descending microwave signal;
LTE EnodeB unit is used at up direction, and the up LTE standard signal after the demodulation that reception roadbed microwave transmitting and receiving unit sends over sends to LTE SAE unit after becoming upstream data after the processing of LTE standard; And, receive the downlink data that said LTE SAE unit sends at up direction, after the LTE standard is handled, convert descending LTE standard signal into and send to said roadbed microwave transmitting and receiving unit;
LTE SAE (System Architecture Evolution; System Architecture Evolution) unit; Transmit by the data destination after being used to receive the upstream data that LTE EnodeB sends over; Be specially: receive the upstream data that said LTE EnodeB unit sends, send to CN (Core Network, core net) after the processing; And receive the downlink data that core net sends to LTE EnodeB unit, send to the LTEEnodeB unit after the processing.
Embodiment three
As an embodiment preferably; Vehicle-mounted connecting system of the present invention can comprise three sub-systems (each unit among the embodiment two is included in respectively in each subsystem): roadbed receiving subsystem, microwave transmission subsystem, vehicle-mounted access subsystem; Multimode covering as shown in Figure 3, that this three sub-systems cooperatively interacts and realizes high ferro.
Wherein, Vehicle-mounted access subsystem is whole placing in the train; Mainly constitute by the little base station access system of vehicle multi-mode; The little base station access system of this vehicle multi-mode comprises cell on wheels and the vehicle-mounted LTE Transmit-Receive Unit among the embodiment two, and further, said cell on wheels can comprise any or the combination in any in gsm module, TD module, LTE module, WCDMA module, the WLAN module; With access and realization Wifi and the broadband access function that realizes GSM, TD-SCDMA, LTE, WCDMA standard cellphone subscriber; To support various wireless access ways such as GSM/EDGE/TD-SCDMA/LTE/WCDMA/Wi-Fi and various information-based service functions in the compartment are provided, realize that multimode truly covers, as shown in Figure 4.
Gsm module is equivalent to a GSM standard base station, can receive to handle GSM standard wireless signal, is responsible for GSM standard mobile phone speech and other professional accesses in the high ferro train.The concrete course of work is following: receive the GSM standard up-link wireless signal of subscriber equipment, change upstream data after the processing into and send to said vehicle-mounted LTE Transmit-Receive Unit; And receive the downlink data that said vehicle-mounted LTE Transmit-Receive Unit sends, become GSM standard downstream wireless signals after the processing and send to subscriber equipment.
The TD module is equivalent to a TD-SCDMA standard base station, can receive to handle TD-SCDMA standard wireless signal, is responsible for TD-SCDMA standard mobile phone speech and other professional accesses in the high ferro train.The concrete course of work is following: receive the TD-SCDMA standard up-link wireless signal of subscriber equipment, change upstream data after the processing into and send to said vehicle-mounted LTE Transmit-Receive Unit; And receive the downlink data that said vehicle-mounted LTE Transmit-Receive Unit sends, become TD-SCDMA standard downstream wireless signals after the processing and send to subscriber equipment.
The LTE module is equivalent to a LTE standard base station, can receive to handle LTE (TDD or FDD) standard wireless signal, is responsible for LTE standard mobile phone speech and other professional accesses in the high ferro train.The concrete course of work is following: receive the LTE standard up-link wireless signal of subscriber equipment, change upstream data after the processing into and send to said vehicle-mounted LTE Transmit-Receive Unit; And receive the downlink data that said vehicle-mounted LTE Transmit-Receive Unit sends, become LTE standard downstream wireless signals after the processing and send to subscriber equipment.
The WCDMA module is equivalent to a WCDMA standard base station, can receive to handle WCDMA standard wireless signal, is responsible for WCDMA standard mobile phone speech and other professional accesses in the high ferro train.The concrete course of work is following: receive the WCDMA standard up-link wireless signal of subscriber equipment, change upstream data after the processing into and send to said vehicle-mounted LTE Transmit-Receive Unit; And receive the downlink data that said vehicle-mounted LTE Transmit-Receive Unit sends, become WCDMA standard downstream wireless signals after the processing and send to subscriber equipment.
The WLAN module can receive the various wireless signals of handling based on 802.11 agreements, is responsible for the professional access of WLAN in the high ferro train.The concrete course of work is following: receive the various wireless signals based on the 802.1X agreement, change upstream data after the processing into and send to said vehicle-mounted LTE Transmit-Receive Unit; And receive the downlink data that said vehicle-mounted LTE Transmit-Receive Unit sends, become the WLAN data after the processing and send to subscriber equipment.
As shown in Figure 4; Gsm module, TD module, LTE module, WCDMA module, WLAN module can be connected with vehicle-mounted LTE Transmit-Receive Unit through optical fiber or Ethernet; Vehicle-mounted LTE Transmit-Receive Unit also can use optical fiber or Ethernet to be connected with equipment (vehicle-mounted microwave transmitting and receiving unit) in the microwave transmission subsystem, by vehicle-mounted LTE Transmit-Receive Unit the wireless signal of different systems in each standard module is consigned to the roadbed receiving subsystem through the microwave transmission subsystem after treatment.
Fig. 5 is vehicle-mounted LTE Transmit-Receive Unit and the sketch map that is connected of other equipment; It is thus clear that vehicle-mounted LTE Transmit-Receive Unit can also comprise interface board; Interface board provides base-station interface (Iub interface) and Ethernet interface; The base-station interface that the interface board of different size can provide is different with Ethernet interface quantity, can change interface board according to demand, realizes the base station and the Ethernet interface combination of plurality of specifications.Base-station interface can be connected with the base station equipment of other standards; Realize being connected of other base stations and base station controller or core net; Ethernet interface can support the equipment of Ethernet interface to be connected with vehicle-mounted other; Realize like vehicle-mounted monitoring equipment, functions such as video TV, wifi, promptly vehicle-mounted LTE Transmit-Receive Unit can be connected with other base station equipments of supporting base-station interface and/or be connected with other equipment of supporting Ethernet interface through this interface board.
The vehicle-mounted microwave transmitting and receiving unit of microwave transmission subsystem in comprising embodiment two, the roadbed microwave transmitting and receiving unit; Can also comprise and place antenna; This antenna can be contained in positions such as headstock or roof; Shown in the structural representation of Fig. 6 microwave transmission subsystem, the microwave transmission subsystem can be used to realize the wireless transmission between train and the ground.
Vehicle-mounted microwave transmitting and receiving unit uses Ethernet to be connected with antenna; At up direction; Vehicle-mounted microwave transmitting and receiving unit uses microwave and roadbed microwave transmitting and receiving unit interactive information through antenna, and roadbed microwave transmitting and receiving unit receives to separate after the microwave signal of antenna transmission and is transferred to intermediate-freuqncy signal and sends to the roadbed receiving subsystem.The down direction course of work of microwave transmission subsystem is opposite fully with the process of up direction, will not give unnecessary details here.
Be illustrated in figure 7 as the roadbed receiving subsystem structural representation in the present embodiment, the roadbed receiving subsystem comprises LTE ENodeB unit (being the LTE base station) and LTE SAE unit, is used for the data and the data in the core net of vehicle-mounted access subsystem are carried out alternately.
Adopt IF interface to realize connecting between LTE ENodeB unit and the roadbed microwave transmitting and receiving unit, specifically can use optical fiber or Ethernet to connect.
Preferably, LTE SAE unit can pass through being connected of realization of S1 interface and LTE ENodeB unit, specifically also can use optical fiber or Ethernet to connect.
As can beappreciated from fig. 7, a roadbed LTE base station (being LTE EnodeB unit) can connect a plurality of roadbed microwave transmitting and receivings unit, returns the quantity of optical fiber or Ethernet in the capacity that concrete number of connection depends on the LTE base station and the practice of construction.
Need to prove, the Doppler frequency deviation when the microwave high-frequency rate has increased the high ferro high-speed cruising, but this problem can come through the anti-Doppler frequency deviation algorithm that improves vehicle-mounted LTE Transmit-Receive Unit effectively to solve.
Can find out that through above several embodiment there are following advantage in vehicle-mounted cut-in method and system based on LTE of the present invention:
One, the cell on wheels among the present invention has comprised gsm module, TD module, LTE module, WCDMA module, WLAN module; Therefore can realize various wireless access ways such as GSM/EDGE/TD-SCDMA/LTE/WCDMA/WLAN and various information-based service functions in the compartment are provided, realize that multimode truly covers;
Two, owing to place train inner vehicle-mounted access subsystem, make signal, eliminated the car body penetration loss directly at the train internal communication; And, in train travelling process, do not have the minizone switching problem through the network insertions such as GSM/TD/LTE that vehicle-mounted access subsystem in the compartment provides, do not exist owing to the frequent signaling storm that causes that switches yet;
Three, owing to adopted the LTE technology; Signaling that LTE simplifies and flat networking design; Make sub-district switching time between vehicle-mounted LTE Transmit-Receive Unit and the roadbed LTE ENodeB than having improved 10 times the switching time of traditional 2G, make sub-district switched design difficulty obtain bigger simplification; And can hang a plurality of microwave upstream device under the LTE ENodeB,, reduce the frequency that switch the sub-district between vehicle-mounted LTE transmitter module and the LTE ENodeB so increased the overlay area of a LTE sub-district;
Four, most important; Because vehicle-mounted cut-in method of the present invention and system have adopted microwave technology, with microwave as wireless signal transmission, when high ferro or other equipment that use native system during fast through the somewhere; The frequency of cell on wheels can not cause interference to the frequency that railway, particularly is near other 2G/3G base stations the station, city along the line; (inside possibly have the multiple row train simultaneously AT STATION, and these trains are again the dynamic high speed operations can effectively to avoid simultaneously interfering with each other between the cell on wheels; On frequency planning, be difficult to avoid interference), greatly reduce the network planning design difficulty of high ferro networking; In addition because method and system of the present invention have been used microwave technology; Because the frequency of microwave is high; So the antenna size than traditional LTE frequency range on the size design of top antenna is little, the fail safe that reduces promptly to have improved bullet train of antenna size, undersized in addition antenna can also reduce windage; Help train and install, for traffic safety provides powerful guarantee.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection range of the present invention.
Claims (10)
1. the vehicle-mounted connecting system based on LTE is characterized in that, comprising:
Cell on wheels is used to receive the up-link wireless signal in the compartment, becomes upstream data after the processing and sends to vehicle-mounted LTE Transmit-Receive Unit; And receive the downlink data that said vehicle-mounted LTE Transmit-Receive Unit sends over, become downstream wireless signals after the processing and send to subscriber equipment;
Vehicle-mounted LTE Transmit-Receive Unit is used to receive said upstream data, after the LTE standard is handled, converts up LTE standard signal to and sends to vehicle-mounted microwave transmitting and receiving unit; And the descending LTE standard signal behind the receiving demodulation, after the LTE standard is handled, become downlink data and send to said cell on wheels;
Vehicle-mounted microwave transmitting and receiving unit is used to receive said up LTE standard signal, is modulated to after the up microwave signal outwards to send; And receive descending microwave signal, send to said vehicle-mounted LTE Transmit-Receive Unit after being demodulated to descending LTE standard signal.
2. the vehicle-mounted connecting system based on LTE according to claim 1 is characterized in that, also comprises:
At least one roadbed microwave transmitting and receiving unit; Be used to receive said up microwave signal; Whether the intensity of judging said up microwave signal is greater than preset threshold value, if then said up microwave signal is demodulated to up LTE standard signal and sends to LTE ENodeB unit; And receive the descending LTE standard signal in the said LTE EnodeB unit, send to said vehicle-mounted microwave transmitting and receiving unit after being modulated into descending microwave signal;
LTE EnodeB unit is used for the up LTE standard signal behind the receiving demodulation, sends to LTE SAE unit after after the LTE standard is handled, becoming upstream data; And receive the downlink data that said LTE SAE unit sends over, after the LTE standard is handled, convert descending LTE standard signal into and send to said roadbed microwave transmitting and receiving unit;
LTE SAE unit is used to receive the upstream data that said LTE EnodeB unit sends, and sends to core net after the processing; And receive the downlink data that core net sends to LTE EnodeB unit, send to LTE EnodeB unit after the processing.
3. the vehicle-mounted connecting system based on LTE according to claim 2 is characterized in that, said cell on wheels comprises any or the combination in any in gsm module, TD module, LTE module, WCDMA module, the WLAN module;
Said gsm module is used to receive the GSM standard up-link wireless signal of subscriber equipment, changes upstream data after the processing into and sends to said vehicle-mounted LTE Transmit-Receive Unit; And receive the downlink data that said vehicle-mounted LTE Transmit-Receive Unit sends, become GSM standard downstream wireless signals after the processing and send to subscriber equipment;
Said TD module is used to receive the TD-SCDMA standard up-link wireless signal of subscriber equipment, changes upstream data after the processing into and sends to said vehicle-mounted LTE Transmit-Receive Unit; And receive the downlink data that said vehicle-mounted LTE Transmit-Receive Unit sends, become TD-SCDMA standard downstream wireless signals after the processing and send to subscriber equipment;
Said LTE module is used to receive the LTE standard up-link wireless signal of subscriber equipment, changes upstream data after the processing into and sends to said vehicle-mounted LTE Transmit-Receive Unit; And receive the downlink data that said vehicle-mounted LTE Transmit-Receive Unit sends, become LTE standard downstream wireless signals after the processing and send to subscriber equipment;
Said WCDMA module is used to receive the WCDMA standard up-link wireless signal of subscriber equipment, changes upstream data after the processing into and sends to said vehicle-mounted LTE Transmit-Receive Unit; And receive the downlink data that said vehicle-mounted LTE Transmit-Receive Unit sends, become WCDMA standard downstream wireless signals after the processing and send to subscriber equipment;
Said WLAN module is used to receive the various wireless signals based on the 802.1X agreement, changes upstream data after the processing into and sends to said vehicle-mounted LTE Transmit-Receive Unit; And receive the downlink data that said vehicle-mounted LTE Transmit-Receive Unit sends, become the WLAN data after the processing and send to subscriber equipment.
4. the vehicle-mounted connecting system based on LTE according to claim 3 is characterized in that:
Said vehicle-mounted LTE Transmit-Receive Unit comprises interface board, and said interface board comprises one or more base-station interfaces and/or one or more Ethernet interface;
And/or
Said vehicle-mounted connecting system also comprises antenna.
5. the vehicle-mounted connecting system based on LTE according to claim 4; It is characterized in that; Between said vehicle-mounted LTE Transmit-Receive Unit and the said vehicle-mounted microwave transmitting and receiving unit, between said roadbed microwave transmitting and receiving unit and the said LTE ENodeB unit, between said LTE ENodeB unit and the said LTE SAE unit, use optical fiber or Ethernet to connect; Said vehicle-mounted microwave transmitting and receiving unit is connected through Ethernet with antenna; Said gsm module, TD module, LTE module, WLAN module are connected with said vehicle-mounted LTE Transmit-Receive Unit through optical fiber or Ethernet respectively.
6. the vehicle-mounted cut-in method based on LTE comprises up access procedure and descending access procedure, it is characterized in that:
Said up access procedure may further comprise the steps: cell on wheels receives the up-link wireless signal in the compartment; Become upstream data after the processing; After the LTE standard is handled, converting up LTE standard signal to, is up microwave signal and outwards transmission by vehicle-mounted microwave transmitting and receiving cells modulate then;
Said descending access procedure may further comprise the steps: vehicle-mounted microwave transmitting and receiving unit converts thereof into descending LTE standard signal after receiving descending microwave signal; After the LTE standard is handled, become downlink data, become downstream wireless signals and send to subscriber equipment after handling by cell on wheels then.
7. the vehicle-mounted cut-in method based on LTE according to claim 6 is characterized in that:
In the said up access procedure; After said vehicle-mounted microwave transmitting and receiving unit is modulated to said up LTE standard signal up microwave signal and outwards sends; Also comprise step: after roadbed microwave transmitting and receiving unit receives said up microwave signal; Whether the intensity of judging said up microwave signal, becomes upstream data and sends to core net after the LTE standard is handled then if then said up microwave signal is demodulated to up LTE standard signal greater than preset threshold value;
In the said descending access procedure; Before said vehicle-mounted microwave transmitting and receiving unit receives said descending microwave signal; Also comprise step: receive LTE SAE downlink data; After the LTE standard is handled, convert descending LTE standard signal to, become descending microwave signal by roadbed microwave transmitting and receiving cells modulate then and send to said vehicle-mounted microwave transmitting and receiving unit.
8. the vehicle-mounted cut-in method based on LTE according to claim 7 is characterized in that:
Wireless signal comprises any one or the combination in any in GSM standard signal, TD-SCDMA standard signal, LTE standard signal, WCDMA standard signal and the WLAN standard signal.
9. according to claim 6 or 7 or 8 described vehicle-mounted cut-in methods, it is characterized in that based on LTE:
Said up LTE standard signal, descending LTE standard signal are intermediate-freuqncy signal;
And/or
The process that said LTE standard is handled specifically comprises: modulation, demodulation, encapsulation, decapsulation, error handling processing, re-transmission, scheduling.
10. the vehicle-mounted cut-in method based on LTE according to claim 9 is characterized in that the frequency range of microwave signal is 6GHz～23GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110264728.1A CN102316472B (en) | 2011-09-08 | 2011-09-08 | Vehicle access method based on long term evolution (LTE) and system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110264728.1A CN102316472B (en) | 2011-09-08 | 2011-09-08 | Vehicle access method based on long term evolution (LTE) and system thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN102316472A true CN102316472A (en) | 2012-01-11 |
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| CN103249088A (en) * | 2012-10-26 | 2013-08-14 | 重庆华非云通讯技术有限公司 | LTE (long term evolution)-WLAN (wireless local area network) compound networking method for vehicle-ground wireless communication system |
| CN103607774A (en) * | 2013-11-28 | 2014-02-26 | 中国联合网络通信集团有限公司 | Communication method and device |
| CN103916947A (en) * | 2013-01-04 | 2014-07-09 | 中国移动通信集团公司 | Method and device for operation of public network base station |
| CN109246716A (en) * | 2018-11-30 | 2019-01-18 | 电子科技大学 | Improve the system and method for bullet train mobile communication coverage effect |
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| CN109548199A (en) * | 2018-12-17 | 2019-03-29 | 深圳市奥克多普科技有限公司 | A kind of local microcellulor signal covering micro-base station application system |
| CN110337109A (en) * | 2019-07-24 | 2019-10-15 | 上海邻里邻外信息科技有限公司 | Micro-base station control system based on community's building |
| CN115119177A (en) * | 2022-08-24 | 2022-09-27 | 广东省新一代通信与网络创新研究院 | Vehicle-mounted communication system and method for vehicle-ground communication |
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| CN109548199A (en) * | 2018-12-17 | 2019-03-29 | 深圳市奥克多普科技有限公司 | A kind of local microcellulor signal covering micro-base station application system |
| CN110337109A (en) * | 2019-07-24 | 2019-10-15 | 上海邻里邻外信息科技有限公司 | Micro-base station control system based on community's building |
| CN115119177A (en) * | 2022-08-24 | 2022-09-27 | 广东省新一代通信与网络创新研究院 | Vehicle-mounted communication system and method for vehicle-ground communication |
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