CN103428709B - mixed communication method and system - Google Patents
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- CN103428709B CN103428709B CN201210159175.8A CN201210159175A CN103428709B CN 103428709 B CN103428709 B CN 103428709B CN 201210159175 A CN201210159175 A CN 201210159175A CN 103428709 B CN103428709 B CN 103428709B
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Abstract
The present invention relates to a kind of mixed communication method and system, the method realizes based on hybrid communication system, hybrid communication system comprises the Vehicular communication system be positioned on train, to be connected by power line with Vehicular communication system and to be positioned at the relaying converting system of fixed location, and with the core network system of relaying converting system by Fiber connection, the subscriber equipment on train communicates with core network system and comprises the following steps: subscriber equipment is by radiofrequency signal and Vehicular communication system interactive communication data; Vehicular communication system passes through the signal of telecommunication and the relaying converting system interactive communication data of power line transmission; Relaying converting system passes through light signal and the core network system interactive communication data of Optical Fiber Transmission.Mixed communication method and system of the present invention improves the communication quality of radio communication on train, reduces cutting off rate.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to the wireless communications method under a kind of high ferro environment and system.
Background technology
The new demand that high ferro radio communication is high ferro application and proposes in promoting, along with high ferro is in the use extensively and profoundly of China, the demand of high ferro radio communication also can be increasing.The feature of high ferro: one is that speed is fast, and current Chinese high ferro service speed has 250 kilometers/hour, reaches 380 kilometers/hour the soonest; Two is that compartment adopts enclosed construction; Three is adopt aerial high-voltage power line along the line to be high ferro train power supply.
Compare conventional wireless communication, the feature of high ferro brings a following difficult problem to radio communication:
1, car body penetration loss strengthens.Owing to being closed railroad car, car body penetration loss is up to more than 20dB, in order to overcome car body penetration loss, requiring that outdoor signal transmitter power strengthens, require that base station receiver sensitivity is higher or require UE(UserEquipment user terminal) the enhancing that transmits.
2, tunnel communication problem, tunnel is as the part of railway, and directly have influence on the index that railway covers, it is imperative to cover.Pattern and the effect length information source in tunnel are chosen, coverage mode etc.At present not for the solution that tunnel communication is unified, and most of system realizes being all it can be used as a special community to realize separately, poor with the compatibility of existing system.
3, high speed is brought and is switched frequently.Speed per hour more than 250 kilometers/hour makes user in train pass multiple signal cell within the very short time, and location updating is frequent, and signaling traffic load is large, and cutting off rate is high.
4, overlay region is difficult to the demand meeting switching and gravity treatment.UE switches between different base station at least needs 6 seconds, and the high ferro train of running at high speed often is less than 6 seconds by the time of switch area, two base stations, and UE normally cannot complete switching substantially, easily causes call drop.
5, the Doppler effect brought at a high speed is difficult to overcome.The carrier frequency of current mobile communication terminal all adopts follows the tracks of downlink space interface frequency mechanisms, in motion, terminal can transmit with the instantaneous Doppler frequency deviation of 2 times, through base station, uplink and downlink signals can produce strong variations, and Zone switched, downstream signal Doppler shift is suddenlyd change, the doppler spread caused by multipath, makes Received signal strength distort.
6, during high-speed mobile, power control action lost efficacy.The power control process of base station to UE has certain time delay, and when UE translational speed is very fast, the frequency of wireless channel decline is accelerated, channel coherency time shortens, when power controlling delay is greater than coherence time, power controls just can not effectively compensate for channel decline, and power control action lost efficacy.
Due to above 6 difficult points, the communication quality carrying out radio communication at present in high ferro is very low, and cutting off rate is high, is unfavorable for the demand that the popularization of radio communication and high ferro provide high level to serve.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of mixed communication method and system, low to solve the communication quality of radio communication on train, the problem that cutting off rate is high.
For solving above technical problem, the invention provides a kind of mixed communication method, the method realizes based on hybrid communication system, described hybrid communication system comprises the Vehicular communication system be positioned on train, to be connected by power line with described Vehicular communication system and to be positioned at the relaying converting system of fixed location, and with the core network system of described relaying converting system by Fiber connection, the subscriber equipment on train communicates with described core network system and comprises the following steps:
Described subscriber equipment is by radiofrequency signal and described Vehicular communication system interactive communication data;
Described Vehicular communication system passes through the signal of telecommunication of power line transmission and described relaying converting system interactive communication data;
Described relaying converting system passes through the light signal of Optical Fiber Transmission and described core network system interactive communication data.
For solving above technical problem, present invention also offers a kind of hybrid communication system, described hybrid communication system comprises the Vehicular communication system be positioned on train, to be connected by power line with described Vehicular communication system and to be positioned at the relaying converting system of fixed location, and with the core network system of described relaying converting system by Fiber connection, wherein:
Described Vehicular communication system, for by the subscriber equipment interactive communication data in radiofrequency signal and the vehicles, and by the signal of telecommunication of power line transmission and described relaying converting system interactive communication data;
Described relaying converting system, for passing through the signal of telecommunication of power line transmission and described Vehicular communication system interactive communication data, by light signal and the described core network system interactive communication data of Optical Fiber Transmission;
Described core network system, by light signal and the described relaying converting system interactive communication data of Optical Fiber Transmission.
Mixed communication method and system of the present invention mounted base station and remote radio unit (RRU) in railway car, by power line and the station relaying conversion equipment of Along Railway, business data transmission after being processed base station, to the core net of mobile operator, improves radio communication quality, reduces cutting off rate.
Accompanying drawing explanation
Fig. 1 is the syndeton illustraton of model of hybrid communication system of the present invention;
Fig. 2 is the concrete schematic diagram of hybrid communication system of the present invention;
Fig. 3 is the syndeton illustraton of model of ground routine wireless communication system;
Fig. 4 is the schematic flow sheet of mixed communication method of the present invention;
Fig. 5 is the idiographic flow schematic diagram of step 402 in Fig. 4;
Fig. 6 is another idiographic flow schematic diagram of step 402 in Fig. 4;
Fig. 7 is the idiographic flow schematic diagram of step 403 in Fig. 4;
Fig. 8 is another idiographic flow schematic diagram of step 403 in Fig. 4;
Fig. 9 is the UE certification register flow path based on hybrid communication system of the present invention;
Figure 10 is the UE calling flow process based on hybrid communication system of the present invention;
Figure 11 is the called call flow of UE based on hybrid communication system of the present invention.
Embodiment
Power line communication (PowerLineCommunication, being called for short PLC) technology refers to a kind of communication mode utilizing power line transmission data and media signal, this technology is that the high frequency of carrying information is loaded on electric current, then use wire transfer, the adapter receiving information is separated high frequency to realize information transmission again from electric current.Transmission rate is up to 200 mbit at present, can meet the data communication bandwidth requirement between base station and core net.
Fig. 1 shows the syndeton illustraton of model of the present invention in conjunction with the hybrid communication system of power line communication, described hybrid communication system comprises the Vehicular communication system 100 be positioned on train, to be connected by power line with described Vehicular communication system and to be positioned at the relaying converting system 200 of fixed location (such as station), and pass through the core network system 300 of Fiber connection with described relaying converting system, wherein:
Described Vehicular communication system, for by the subscriber equipment interactive communication data in radiofrequency signal and the vehicles, and by the signal of telecommunication of power line transmission and described relaying converting system interactive communication data;
Described relaying converting system, for passing through the signal of telecommunication of power line transmission and described Vehicular communication system interactive communication data, by light signal and the described core network system interactive communication data of Optical Fiber Transmission;
Described core network system, by light signal and the described relaying converting system interactive communication data of Optical Fiber Transmission.
As shown in Figure 2, described Vehicular communication system, comprise cell on wheels (BasebandUnite, BBU) 101, vehicle mounted far-end radio frequency unit (RemoteRadioUnit, RRU) 102, vehicle-mounted PLC(PowerLineCommunication, power line communication) modulating equipment 103 and vehicle-mounted PLC demodulated equipment 104, described vehicle-mounted PLC modulating equipment 103 is connected with cell on wheels 10101 communication, vehicle-mounted PLC demodulated equipment 104 is connected with cell on wheels 10101 communication, and described cell on wheels 10101 is by Fiber connection vehicle mounted far-end radio frequency unit 102.
High ferro adopts aerial high-voltage power line along the line to be the feature of high ferro train power supply, for hybrid communication system of the present invention realizes providing antecedent basis.Preferably, often row high ferro train has a BBU, and often saving compartment has a RRU, and described BBU and RRU forms vehicle-mounted access network in high ferro train.Be connected by power line between train with station, station and core net pass through Fiber connection.
Wherein:
Described vehicle mounted far-end radio frequency unit is used for radiofrequency signal mutual with subscriber equipment, baseband signal mutual with described cell on wheels, and realizes the conversion between radiofrequency signal and baseband signal;
Described cell on wheels, for with the mutual baseband signal of described vehicle mounted far-end radio frequency unit, baseband signal after described vehicle-mounted PLC modulating equipment transmission processing, and receive the baseband signal of described vehicle-mounted PLC demodulated equipment transmission, the baseband signal after described vehicle mounted far-end radio frequency unit transmission processing; Also for processing the baseband signal received;
Described vehicle-mounted PLC modulating equipment, for receiving the baseband signal that described cell on wheels sends, and the modulates baseband signals sent by described cell on wheels is that the signal of telecommunication is loaded on power line;
Described vehicle-mounted PLC demodulated equipment, for being demodulated into baseband signal by the signal of telecommunication on power line and sending to described cell on wheels.
Described station relaying converting system, comprise relaying PLC modulating equipment 201, relaying PLC demodulated equipment 202 and relaying optical transmitter and receiver 203, relaying PLC modulating equipment 201 is connected with relaying optical transmitter and receiver 203 communication, PLC demodulated equipment 202 is connected with optical transmitter and receiver 203 communication, and described station relaying converting system and Vehicular communication system pass through high ferro high-voltage power line transmitting data information along the line.
Wherein:
Described relaying PLC modulating equipment, for receiving the signal of telecommunication that described relaying optical transmitter and receiver sends, and is loaded on power line by the signal of telecommunication that described relaying optical transmitter and receiver sends;
Described relaying PLC demodulated equipment, for obtaining the signal of telecommunication from demodulation on power line and sending to described relaying optical transmitter and receiver;
Described relaying optical transmitter and receiver, with described relaying PLC modulating equipment, relaying PLC demodulated equipment and Fiber connection, for receiving the signal of telecommunication that described relaying PLC demodulated equipment sends, exports to optical fiber after being converted to light signal; And receive the light signal of optical fiber input, send to described relaying PLC modulating equipment after being converted to the signal of telecommunication.
Described Operator Core Network system is identical with the core network system of normal mobile communication, comprises equipment of the core network 6 and the optical transmitter and receiver 5 for Optical Fiber Transmission.
Fig. 3 is the syndeton illustraton of model of ground routine wireless communication system, and by Fiber connection between the Access Network be made up of BBU+RRU and core net, UE is by radiofrequency signal and RRU communication.Be characterized in that core net and Access Network are fixed, only have UE user terminal to move.
Compared to ground routine wireless communication system, in hybrid communication system of the present invention, add relaying converting system, for the conversion of electric-power wire communication signal and optical fiber communication signal.Meanwhile, the feature of hybrid communication system is that core net is fixed, and the Access Network be made up of BBU+RRU and UE user terminal are with high ferro train high-speed mobile.
In the present invention, by air interface transmission radio frequency signal between UE and RRU, by Optical Fiber Transmission baseband signal between RRU and BBU, the business datum signal after being modulated by power line transmission between BBU and station relay system, by Optical Fiber Transmission business datum signal between station relay system and core net.
The wireless area of described hybrid communication system is arranged on interior, no matter high ferro with how soon speeds, user in compartment is less than 5 kilometers/hour relative to the translational speed in compartment, and the channel circumstance therefore in high ferro railway car is the same with the channel circumstance on ground.Configure a vehicle-mounted RRU owing to often saving compartment, namely often saving compartment scope is a wireless area, and user terminal moves in same compartment, cell merge can not occur; When user terminal moves between different compartment, carrying out cell merge, because translational speed is less than 5 kilometers/hour, is the same with the handoff scenario of ground environment.Therefore described hybrid communication system can not bring because of running at high speed of high ferro frequent cell merge, overlay cells are difficult to meet and switch and gravity treatment demand, be difficult to the difficult problem that the Doppler effect that overcomes and power control action lost efficacy.
The high-iron carriage of described hybrid communication system is closed, and external interference is little on compartment impact, and the vehicle-mounted BBU therefore in high ferro train can arrange less transmitting power, makes described hybrid communication system can do to obtain environmental protection.
Described hybrid communication system can apply various radio communication standard, comprises GSM, CDMA, UMTS, LTE and Wifi etc.
Based on aforementioned hybrid communication system, present invention also offers a kind of mixed communication method, as previously mentioned, described hybrid communication system comprises the Vehicular communication system be positioned on train, to be connected by power line with described Vehicular communication system and to be positioned at the relaying converting system of fixed location, and with the core network system of described relaying converting system by Fiber connection, as shown in Figure 4, the subscriber equipment on train communicates with described core network system and comprises the following steps:
Step 401: described subscriber equipment is by radiofrequency signal and described Vehicular communication system interactive communication data;
Step 402: described Vehicular communication system passes through the signal of telecommunication of power line transmission and described relaying converting system interactive communication data;
As previously mentioned, described Vehicular communication system comprises vehicle mounted far-end radio frequency unit (RRU), cell on wheels (BBU), vehicle mounted electric line of force communication (PLC) modulating equipment and vehicle-mounted PLC demodulated equipment.
When described Vehicular communication system sends communication data to described relaying converting system, as shown in Figure 5, step 402 comprises:
Step 4021a: described vehicle mounted far-end radio frequency unit receives the radiofrequency signal that subscriber equipment sends, and sends to described cell on wheels after being converted to baseband signal;
Step 4022a: described cell on wheels receives the baseband signal that described vehicle mounted far-end radio frequency unit sends, and is after the signal of telecommunication, sends to described vehicle-mounted PLC modulating equipment by the base band signal process of reception;
Step 4023a: described vehicle-mounted PLC modulating equipment receives the signal of telecommunication that described cell on wheels sends, and the signal of telecommunication sent by described cell on wheels modulation is loaded on power line;
Step 4024a: described relaying converting system obtains the signal of telecommunication from demodulation power line.
When described relaying converting system sends communication data to described Vehicular communication system, as shown in Figure 6, step 402 comprises:
Step 4021b: the signal of telecommunication is loaded on power line by described relaying converting system;
Step 4022b: described vehicle-mounted PLC demodulated equipment obtains the signal of telecommunication from demodulation power line, and sends to cell on wheels;
Step 4023b: described cell on wheels receives the described signal of telecommunication, sends to described vehicle mounted far-end radio frequency unit after process obtains baseband signal;
Step 4024b: described vehicle mounted far-end radio frequency unit receives the baseband signal after described cell on wheels process, and sends to subscriber equipment after being converted to radiofrequency signal.
Step 403: described relaying converting system passes through the light signal of Optical Fiber Transmission and described core network system interactive communication data.
Described relaying converting system comprises the communication of repeated power line (PLC) modulating equipment, relaying PLC demodulated equipment and relaying optical transmitter and receiver, and core network system comprises equipment of the core network and core net optical transmitter and receiver.
When described relaying converting system sends communication data to described core network system, as shown in Figure 7, step 403 comprises:
Step 4031a: described relaying PLC demodulated equipment obtains the signal of telecommunication from demodulation power line and sends to described relaying optical transmitter and receiver;
Step 4032a: described relaying optical transmitter and receiver receives the signal of telecommunication that described relaying PLC demodulated equipment sends, and exports after being converted to light signal to optical fiber;
Step 4033a: described core net optical transmitter and receiver, from receiving optical signals optical fiber, sends to described equipment of the core network after being converted to the signal of telecommunication;
Step 4034a: described equipment of the core network receives the described signal of telecommunication.
When described core network system sends communication data to described relaying converting system, as shown in Figure 8, step 403 comprises:
Step 4031b: described equipment of the core network sends the signal of telecommunication;
Step 4032b: described core net optical transmitter and receiver is received the described signal of telecommunication and sent by optical fiber after being converted to light signal;
Step 4033b: described relaying optical transmitter and receiver receives the light signal of optical fiber input, sends to described relaying PLC modulating equipment after being converted to the signal of telecommunication;
Step 4034b: described relaying PLC modulating equipment receives the signal of telecommunication that described relaying optical transmitter and receiver sends, and the signal of telecommunication that described relaying optical transmitter and receiver sends is loaded on power line.
Understandably, the said communication data of the present invention comprises but is not limited to following content: described subscriber equipment completes certification registration, caller and called business datum.
Below respectively certification registration process, caller and called communication process are described in detail:
Based on described hybrid communication system certification registration process as shown in Figure 9, be specially following steps:
Step 901: when passenger enters high-iron carriage, the wireless communication user terminal equipment of passenger receives the radiofrequency signal that vehicle mounted far-end radio frequency unit 102 sends at once, and described signal indication terminal equipment has entered a new movable signal overlay area;
Step 902: terminal equipment sends certification and registration signal, this certification and log-on data to be received by remote radio unit (RRU) 102 as radiofrequency signal and are converted to baseband signal, by Optical Fiber Transmission to cell on wheels 101;
Step 903: cell on wheels 101 obtains the signal of telecommunication of business datum after described baseband signal also processes receiving, modulated by vehicle-mounted PLC modulating equipment 103 pairs of business datums, the high frequency electrical signal of carrying information is loaded on electric current, then transmits on high ferro high-voltage power line along the line;
Step 904: the relaying PLC demodulated equipment 201 at station receives high ferro power line and demodulation obtains the signal of telecommunication of business datum, and then the signal of telecommunication is changed into light signal by relaying optical transmitter and receiver 203, by the core net optical transmitter and receiver 302 of Optical Fiber Transmission to mobile operator core net machine room;
Step 905: core net optical transmitter and receiver 302 receiving optical signals of mobile operator core net machine room is also converted to the signal of telecommunication, transfers to equipment of the core network 301;
Step 906: user profile is also retained in its visiting subscribers database by the legal identity of equipment of the core network certification mobile subscriber, authentication result is returned simultaneously;
Step 907: the business datum of passback transfers light signal as the signal of telecommunication to by core net optical transmitter and receiver 302, by the relaying optical transmitter and receiver 203 of Optical Fiber Transmission to station;
Step 908: the relaying optical transmitter and receiver 203 at station receives the light signal of the business datum of core net and is converted to the signal of telecommunication, and then modulated by relaying PLC modulating equipment 202 pairs of business datums, the high frequency electrical signal of carrying information is loaded on electric current, then transmits on high ferro high-voltage power line along the line;
Step 909: the vehicle-mounted PLC demodulated equipment 104 of high ferro train receives signal on high ferro power line and demodulation obtains the signal of telecommunication of business datum, is transferred to cell on wheels 101;
Step 910: cell on wheels 101 obtains the authentication result of core net to mobile subscriber terminal after receiving this business datum, and send allow access instruction, this permission incoming instruction as baseband signal by Optical Fiber Transmission to vehicle mounted far-end radio frequency unit 102;
Step 911: vehicle mounted far-end radio frequency unit 102 receiving baseband signal is also converted to radio frequency signal propagation to high-iron carriage inner space and is moved user terminal and receives, and then the region that mobile subscriber terminal access high ferro wireless communication networks covers.
Based on described hybrid communication system caller process as shown in Figure 10, be specially following steps:
Step 1001: when high ferro passenger needs to communicate with the user on ground, passenger's operating handset (i.e. calling terminal equipment) sends the Subscriber Number of request communication and communication counterpart, this information to be received by vehicle mounted far-end radio frequency unit 102 as radiofrequency signal and transfers baseband signal to, by Optical Fiber Transmission to cell on wheels 101;
Step 1002: cell on wheels 101 receiving baseband signal is gone forward side by side and obtained the signal of telecommunication of business datum after row relax, modulate by vehicle-mounted plc communication modulating equipment 103 and load on electric current, being then transferred to the relaying PLC demodulated equipment 202 at station by the high-voltage power line that high ferro is along the line;
Step 1003: the signal of telecommunication of relaying PLC demodulated equipment 204 pairs of power lines at station carries out demodulation, reduction obtains the signal of telecommunication of business datum, then light signal is transferred to by relaying optical transmitter and receiver 203, by the core net optical transmitter and receiver 302 of Optical Fiber Transmission to mobile operator core net machine room;
Step 1004: the core net optical transmitter and receiver 302 of mobile operator core net machine room transfers the business datum of light signal to the signal of telecommunication, sends to equipment of the core network 301;
Step 1005: the legal identity of described equipment of the core network 301 authenticated user also makes a call to called subscriber;
Step 1006: when called subscriber is switched on, described equipment of the core network 301 transfers called user information to relaying optical transmitter and receiver 203 that light signal loopback is transferred to station through core net optical transmitter and receiver 302;
Step 1007: the relaying optical transmitter and receiver 203 at station receives the light signal of core network service data and is converted to the signal of telecommunication, then modulate through relaying PLC modulating equipment 201 and load on electric current, being then transferred to the vehicle-mounted PLC demodulated equipment 104 of high ferro train by the high-voltage power line that high ferro is along the line;
Step 1008: the vehicle-mounted PLC demodulated equipment 104 demodulation power line of high ferro train obtains the signal of telecommunication of business datum, is transferred to cell on wheels 101;
Step 1009: cell on wheels 101 receives the signal of telecommunication of business datum, obtains information that called subscriber connects and instruction sending goes code;
Step 1010: described in go code as baseband signal by Optical Fiber Transmission to vehicle mounted far-end radio frequency unit 102, vehicle mounted far-end radio frequency unit 102 receives and this baseband signal is converted to the inner space of radio frequency signal propagation to high-iron carriage;
Step 1011: the calling terminal equipment of passenger receives this radiofrequency signal, sets up the wireless communication between caller and called user terminal, thus set up communication, until any one party hangs up connection.
Based on described hybrid communication system called process as shown in figure 11, be specially following steps:
Step 1101: after equipment of the core network 301 receives the calling of public switched telephone network (PSTN), the log-on message of called subscriber is obtained by inquiring about described visiting subscribers database, learn that called user terminal is arranged in high ferro train, described equipment of the core network 301 sends call instruction to the station that this high ferro train is corresponding, call instruction transfers light signal as the signal of telecommunication to by core net optical transmitter and receiver 302, through the relaying optical transmitter and receiver 203 of Optical Fiber Transmission to the station of described correspondence;
Step 1102: transfer the signal of telecommunication to after relaying optical transmitter and receiver 203 reception at described corresponding station, modulated by relaying PLC modulating equipment 201 and loaded on electric current again, being then transferred to the vehicle-mounted PLC demodulated equipment 104 of corresponding high ferro train by high ferro high-voltage power line along the line;
Step 1103: vehicle-mounted PLC demodulated equipment 104 pairs of power line demodulation of described high ferro train, reduction obtains the signal of telecommunication, is transferred to cell on wheels 101;
Step 1104: cell on wheels 101 receipt of call instruction also transfers baseband signal to by Optical Fiber Transmission to vehicle mounted far-end radio frequency unit 102;
Step 1105: vehicle mounted far-end radio frequency unit 102 transfers described baseband signal the inner space of radio frequency signal propagation to high-iron carriage to, called user terminal received RF signal, set up the wireless communication between caller and called user terminal, thus set up communication, until any one party hangs up connection.
The feature that mixed communication method and system of the present invention utilizes the high speed of high ferro, high-voltage power line closed and along the line is powered, can ensure that the terminal use such as mobile phone, portable computer still can proper communication in high ferro is run, the service level promoting high ferro and the business demand that meets mobile subscriber are had very great help.
Mixed communication method and system of the present invention mounted base station and remote radio unit (RRU) in railway car, by power line and the station relaying conversion equipment of Along Railway, business data transmission after being processed base station is to the core net of mobile operator, fundamentally avoid run at high speed brought frequent switching, overlay cells of train to be difficult to meet and to switch and gravity treatment demand, Doppler effect and power control Problem of Failure, the mobile environment of high ferro inside and the mobile environment of ground routine are consistent; And because the closure of high-iron carriage is good, in compartment, user moves less, makes the radio communication quality in high ferro better than the radio communication quality of ground routine, solves compartment shielding and tunnel communication problem, reduce cutting off rate, to the great significance of high ferro radio communication.
Claims (7)
1. a mixed communication method, it is characterized in that, the method realizes based on hybrid communication system, described hybrid communication system comprises the Vehicular communication system be positioned on train, to be connected by power line with described Vehicular communication system and to be positioned at the relaying converting system of fixed location, and with the core network system of described relaying converting system by Fiber connection, the subscriber equipment on train communicates with described core network system and comprises the following steps:
Described subscriber equipment is by radiofrequency signal and described Vehicular communication system interactive communication data;
Described Vehicular communication system passes through the signal of telecommunication of power line transmission and described relaying converting system interactive communication data;
Described relaying converting system passes through the light signal of Optical Fiber Transmission and described core network system interactive communication data;
Described Vehicular communication system comprises vehicle mounted far-end radio frequency unit RRU, cell on wheels BBU, vehicle mounted electric line of force communication PLC modulating equipment and vehicle-mounted PLC demodulated equipment, when described Vehicular communication system sends communication data to described relaying converting system, described Vehicular communication system is comprised by the signal of telecommunication of power line transmission and the step of described relaying converting system interactive communication data:
Described vehicle mounted far-end radio frequency unit receives the radiofrequency signal that subscriber equipment sends, and sends to described cell on wheels after being converted to baseband signal; Described cell on wheels receives the baseband signal that described vehicle mounted far-end radio frequency unit sends, and is after the signal of telecommunication, sends to described vehicle-mounted PLC modulating equipment by the base band signal process of reception; Described vehicle-mounted PLC modulating equipment receives the signal of telecommunication that described cell on wheels sends, and the signal of telecommunication sent by described cell on wheels modulation is loaded on power line; Described relaying converting system obtains the signal of telecommunication from demodulation power line;
Or,
The signal of telecommunication is loaded on power line by described relaying converting system; Described vehicle-mounted PLC demodulated equipment obtains the signal of telecommunication from demodulation power line, and sends to cell on wheels; Described cell on wheels receives the described signal of telecommunication, sends to described vehicle mounted far-end radio frequency unit after process obtains baseband signal; Described vehicle mounted far-end radio frequency unit receives the baseband signal after described cell on wheels process, and sends to subscriber equipment after being converted to radiofrequency signal.
2. the method for claim 1, it is characterized in that: described relaying converting system comprises repeated power line communication PLC modulating equipment, relaying PLC demodulated equipment and relaying optical transmitter and receiver, core network system comprises equipment of the core network and core net optical transmitter and receiver, when described relaying converting system sends communication data to described core network system, described relaying converting system is comprised by the light signal of Optical Fiber Transmission and the step of described core network system interactive communication data:
Described relaying PLC demodulated equipment obtains the signal of telecommunication from demodulation power line and sends to described relaying optical transmitter and receiver;
Described relaying optical transmitter and receiver receives the signal of telecommunication that described relaying PLC demodulated equipment sends, and exports after being converted to light signal to optical fiber;
Described core net optical transmitter and receiver, from receiving optical signals optical fiber, sends to described equipment of the core network after being converted to the signal of telecommunication;
Described equipment of the core network receives the described signal of telecommunication.
3. the method for claim 1, it is characterized in that: described relaying converting system comprises repeated power line communication PLC modulating equipment, relaying PLC demodulated equipment and relaying optical transmitter and receiver, core network system comprises equipment of the core network and core net optical transmitter and receiver, when described core network system sends communication data to described relaying converting system, described relaying converting system is comprised by the light signal of Optical Fiber Transmission and the step of described core network system interactive communication data:
Described equipment of the core network sends the signal of telecommunication;
Described core net optical transmitter and receiver is received the described signal of telecommunication and is sent by optical fiber after being converted to light signal;
Described relaying optical transmitter and receiver receives the light signal of optical fiber input, sends after being converted to the signal of telecommunication to described relaying PLC modulating equipment;
Described relaying PLC modulating equipment receives the signal of telecommunication that described relaying optical transmitter and receiver sends, and is loaded on power line by the signal of telecommunication that described relaying optical transmitter and receiver sends.
4. the method for claim 1, is characterized in that: described communication data comprises described subscriber equipment and completes certification registration, caller and called business datum.
5. a hybrid communication system, it is characterized in that, described hybrid communication system comprises the Vehicular communication system be positioned on train, to be connected by power line with described Vehicular communication system and to be positioned at the relaying converting system of fixed location, and with the core network system of described relaying converting system by Fiber connection, wherein:
Described Vehicular communication system, for by the subscriber equipment interactive communication data in radiofrequency signal and the vehicles, and by the signal of telecommunication of power line transmission and described relaying converting system interactive communication data;
Described relaying converting system, for passing through the signal of telecommunication of power line transmission and described Vehicular communication system interactive communication data, by light signal and the described core network system interactive communication data of Optical Fiber Transmission;
Described core network system, by light signal and the described relaying converting system interactive communication data of Optical Fiber Transmission;
Described Vehicular communication system comprises vehicle mounted far-end radio frequency unit RRU, cell on wheels BBU, vehicle mounted electric line of force communication PLC modulating equipment and vehicle-mounted PLC demodulated equipment, wherein:
Described vehicle mounted far-end radio frequency unit is used for radiofrequency signal mutual with subscriber equipment, baseband signal mutual with described cell on wheels, and realizes the conversion between radiofrequency signal and baseband signal;
Described cell on wheels, for with the mutual baseband signal of described vehicle mounted far-end radio frequency unit, baseband signal after described vehicle-mounted PLC modulating equipment transmission processing, and receive the baseband signal of described vehicle-mounted PLC demodulated equipment transmission, the baseband signal after described vehicle mounted far-end radio frequency unit transmission processing; Also for processing the baseband signal received;
Described vehicle-mounted PLC modulating equipment, for receiving the baseband signal that described cell on wheels sends, and the modulates baseband signals sent by described cell on wheels is that the signal of telecommunication is loaded on power line;
Described vehicle-mounted PLC demodulated equipment, for being demodulated into baseband signal by the signal of telecommunication on power line and sending to described cell on wheels.
6. system as claimed in claim 5, is characterized in that: described relaying converting system comprises repeated power line communication PLC modulating equipment, relaying PLC demodulated equipment and relaying optical transmitter and receiver, wherein:
Described relaying PLC modulating equipment, for receiving the signal of telecommunication that described relaying optical transmitter and receiver sends, and is loaded on power line by the signal of telecommunication that described relaying optical transmitter and receiver sends;
Described relaying PLC demodulated equipment, for obtaining the signal of telecommunication from demodulation on power line and sending to described relaying optical transmitter and receiver;
Described relaying optical transmitter and receiver, with described relaying PLC modulating equipment, relaying PLC demodulated equipment and Fiber connection, for receiving the signal of telecommunication that described relaying PLC demodulated equipment sends, exports to optical fiber after being converted to light signal; And receive the light signal of optical fiber input, send to described relaying PLC modulating equipment after being converted to the signal of telecommunication.
7. system as claimed in claim 5, is characterized in that: described communication data comprises described subscriber equipment and completes certification registration, caller and called business datum.
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| CN106740988B (en) * | 2016-11-17 | 2019-02-05 | 胡佳 | A kind of train communication signal realization system |
| CN107889118B (en) * | 2017-10-19 | 2020-11-24 | 北京全路通信信号研究设计院集团有限公司 | LTE-R network system with RRU interleaving redundancy |
| CN107635075A (en) * | 2017-10-26 | 2018-01-26 | 上海爱优威软件开发有限公司 | A kind of method of adjustment and system of terminal communication |
| CN109587656A (en) * | 2018-12-31 | 2019-04-05 | 广东超讯通信技术股份有限公司 | A kind of communication means, wireless fidelity device and terminal device |
| CN111355516A (en) * | 2020-03-23 | 2020-06-30 | 深圳市大拿科技有限公司 | Short-distance communication method and system for rail transit transport vehicle |
| CN113346951A (en) * | 2021-06-01 | 2021-09-03 | 西南交通大学 | Method and system for optical wireless fusion of high-speed flying train and train in vacuum pipeline |
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