CN101478723B - Wireless communication system, wireless access method and base station - Google Patents
Wireless communication system, wireless access method and base station Download PDFInfo
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- CN101478723B CN101478723B CN200910000197A CN200910000197A CN101478723B CN 101478723 B CN101478723 B CN 101478723B CN 200910000197 A CN200910000197 A CN 200910000197A CN 200910000197 A CN200910000197 A CN 200910000197A CN 101478723 B CN101478723 B CN 101478723B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The present invention discloses a wireless communication system, a wireless accessing method and a base station, wherein, the wireless communication system comprises the following components: a base station which is used for executing wireless transmission with the mobile station in the coverage area through air interface and communicating with base station controller through cable television cable; the cable television cable which is used for transmitting cable television signal, Internet data, data transmitted between the base station and the base station controller and supplying electricity for the base station; and an antenna which is connected with the base station and is used for receiving by base station and transmitting RF signal. The existing resource of cable television operator can be fully used through the technical solution of the invention. At the state that the existing network of operation is basically not reconstructed, the coverage of wireless communication signal is realized with minimum construction quantity and lowest cost and without taking space, laying electric cable and optical cable.
Description
Technical field
The present invention relates to the communications field, and especially, relate to a kind of wireless communication system, radio switch-in method and base station.
Background technology
At present; In correlation technique, as shown in Figure 1, the network architecture of traditional wirelessmobile communication system comprises: travelling carriage (Mobile Station; Abbreviate MS as), wireless communication base station, base station controller and equipment of the core network (for example: mobile switch, WMG etc.); Wherein, portable terminal is through air interface and wireless communication base station (that is base station) communication; The base station links to each other with base station controller through dedicated transmissions cable/optical cable, and inserts core net and each gateway through base station controller.
In correlation technique; If realize the covering of wireless communication signal; Wireless communication base station and relevant auxiliary facility need be installed in the locality, and as shown in Figure 2, relevant auxiliary facility comprises: the transmission cable between base station, power converter, storage battery, antenna, the iron tower that fixes up an aerial wire and laying and the base station controller; But, mounted base station, iron tower, set up or cable laying and optical fiber must need the soil and the great amount of manpower of certain area to realize.Therefore, wireless telecommunications operator need pay the construction that high price just possibly accomplished relevant auxiliary facility.
At present, cable television operators hope business is expanded further, thereby develop into mobile communications operator or full-service operator, and therefore, cable television operators must face problems such as expropriation of land, power supply, capital construction.And the spending of this part is much larger than the expense of buying wireless telecommunications system.For cable television operators, except traditional cable television service, all carried out data service; The existing network framework is as shown in Figure 3; TV station gives family with cable TV signal through full coaxial network or hybrid fiber-coaxial (Hybrid FiberCoax abbreviates HFC as) network delivery, along with carrying out of data service; Cable television operators have installed cable modem head-end system (CableModem Termination System at central machine room; Abbreviate CMTS as), and cable modem (Cable Modem abbreviates CM as) has been installed in family; Through special debud mode, the data service signal of TV signal and wide area network is modulated into high frequency analog signals gives TV or household PC through above-mentioned network delivery.With the U.S. is example, and typical scene is as shown in Figure 4, the road both sides in rural area and suburbs; It is very perfect that cable of cable TV has been laid, and the minimum altitude that generally gets into the cable distance ground of family is that the minimum altitude on the cable distance ground between 15.5 feet, highway limit two wire bars is 18 feet, if barrier is arranged below the cable; Then the minimum altitude of cable distance barrier is 2 feet; And the network of cable television operators has also been accomplished bidirectional rebuilding, and (particularly, conventional wired television transmission network all is an one-way transmission; Promptly; Give the user by TV station's transmission signals, and the user is not transmitted data to TV station, so amplifier on former wired TV transmission network network and distributor all are unidirectional.And along with the carrying out of telephone service, cable of cable TV business of networking, the user need be transmitted data and given TV station, and bidirectional rebuilding mainly is to be replaced with these amplifiers on the transmission network and distributor two-way).As shown in Figure 5, have three types of lines between the electric pole, be power line topmost, be generally the Alternating Current Power Supply line; The bottom is a telephone wire; The centre is the load-bearing wirerope, and wherein, the load-bearing wirerope is the main resource that cable television operators have; Cable television operators have installed cable tv coax on the load-bearing wirerope; In addition, owing to need long Distance Transmission data, cable tv coax has also added alternating current through the line powering device; Be used for trunk amplifier signal is amplified, TV and data-signal pass to the user in the family the most at last.
Thereby develop into mobile communications operator or full-service operator if cable television operators further expand business, just need a kind of cut-in method of wireless communication system cheaply.
Summary of the invention
Considering in the correlation technique does not have the problem of wireless communication system cut-in method cheaply for cable television operators and proposes the present invention when developing into mobile communications operator or full-service operator; For this reason; Main purpose of the present invention is to provide a kind of wireless communication system, radio switch-in method and base station, to solve the problems referred to above that exist in the correlation technique.
To achieve these goals, according to an aspect of the present invention, a kind of wireless communication system is provided.
Wireless communication system according to the present invention comprises: the base station is used for carrying out wireless transmission through the travelling carriage in air interface and its overlay area, and communicates through cable of cable TV and base station controller; Cable of cable TV is used to transmit the data of transmitting between cable TV signal, Internet data and base station and the base station controller, and is the base station power supply; Antenna is connected with the base station, is used to the base station and receives and send radiofrequency signal.
Wherein, the base station comprises: signal distribution module, and the data separating that is used for the cable of cable TV transmission is high-frequency signal and Alternating Current Power Supply signal, and high-frequency signal is sent to the cable modem module, and the Alternating Current Power Supply signal is sent to power module; The cable modem module is used for high-frequency signal is carried out modulation, and the data after the modulation are sent to base station module, and becomes analog signal on cable of cable TV, to transmit the data-modulated of base station module output; Base station module is used for the data of cable modem module input are handled, and launches through antenna, and the wireless signal of antenna input is handled, and the data after handling are sent to the cable modem module; Power module is used for the Alternating Current Power Supply signal that receives is handled, and is the base station power supply.
Wherein, base station module comprises: primary processor is used for the data of cable modem module input and the original service signal that the radio base band modem module is exported are carried out the conversion of host-host protocol; The radio base band modem module, the baseband digital signal modulation after being used for the data after the primary processor conversion are carried out modulation and will receive the link frequency conversion is original service signal; The digital intermediate frequency circuit is used for the data after the modulation of radio base band modem module are carried out IF process; Transmitting chain is used for the data that digital intermediate-frequency circuit carries out after the IF process are carried out frequency-conversion processing, and the data after the frequency-conversion processing is outputed to power amplifier; Power amplifier is used for that the data of input are carried out power amplification and handles, and the data after will handling exports antenna to; Low noise amplifier is used for the wireless signal that antenna receives is carried out processing and amplifying; Receive link, the wireless signal frequency conversion that is used for low noise amplifier is carried out after the processing and amplifying is a baseband digital signal.
To achieve these goals, according to a further aspect in the invention, a kind of base station is provided.
Base station according to the present invention comprises: signal distribution module, and the data separating that is used for the cable of cable TV transmission is high-frequency signal and Alternating Current Power Supply signal, and high-frequency signal is sent to the cable modem module, and the Alternating Current Power Supply signal is sent to power module; The cable modem module is used for high-frequency signal is carried out modulation, and the data after the modulation are sent to base station module, and becomes analog signal on cable of cable TV, to transmit the data-modulated of base station module output; Base station module is used for the data of cable modem module input are handled, and launches through antenna, and the wireless signal of antenna input is handled, and the data after handling are sent to the cable modem module; Power module is used for the Alternating Current Power Supply signal that receives is handled, and is the base station power supply.
Wherein, base station module comprises: primary processor is used for the data of cable modem module input and the original service signal that the radio base band modem module is exported are carried out the conversion of host-host protocol; The radio base band modem module, the baseband digital signal modulation that is used for the data after the primary processor conversion are carried out modulation and will be received the link frequency conversion is original service signal; The digital intermediate frequency circuit is used for the data after the modulation of radio base band modem module are carried out IF process; Transmitting chain is used for the data that digital intermediate-frequency circuit carries out after the IF process are carried out frequency-conversion processing, and the data after the frequency-conversion processing is outputed to power amplifier; Power amplifier is used for that the data after the transmitting chain frequency conversion of input are carried out power amplification and handles, and the data after will handling exports antenna to; Low noise amplifier is used for the wireless signal that antenna receives is carried out processing and amplifying; Receive link, the wireless signal frequency conversion that is used for low noise amplifier is carried out after the processing and amplifying is a baseband digital signal.
To achieve these goals, according to a further aspect in the invention, a kind of radio switch-in method is provided.
Radio switch-in method according to the present invention comprises: cable of cable TV transmits the data between base station and the base station controller in transmission cable TV signal and Internet data, and is the base station power supply; The base station communicates through cable of cable TV and base station controller, and carries out wireless transmission through the travelling carriage in air interface and its overlay area.
Wherein, cable of cable TV is that the processing that the base station supplies power comprises: the signal of base station distribution module sends to power module with the Alternating Current Power Supply signal; The Alternating Current Power Supply signal that electric power source pair of module receives is handled, and is the base station power supply.
Wherein, the base station communicates through cable of cable TV and base station controller and comprises: the signal of base station distribution module is high-frequency signal and Alternating Current Power Supply signal with the data separating of cable of cable TV transmission, and high-frequency signal is sent to the cable modem module; The cable modem module is carried out modulation to high-frequency signal, and the data after the modulation are sent to base station module, and becomes analog signal on cable of cable TV, to transmit the data-modulated of base station module output; Base station module is handled the data of cable modem module input, launches through antenna, and the wireless signal of antenna input is handled, and the data after handling are sent to the cable modem module.
Wherein, base station module is handled the data of cable modem module input and comprised: the primary processor of base station module carries out the conversion of host-host protocol, and the data after will changing send to the radio base band modem module of base station module through internal interface; Data after the radio base band modem module is changed primary processor are carried out modulation, and the data after will modulating send to the digital intermediate frequency circuit of base station module; The digital intermediate frequency circuit carries out IF process to the data after modulating, at the transmitting chain that the data after the IF process is sent to base station module; The data of transmitting chain after to IF process are carried out frequency-conversion processing, and the data after the frequency conversion are sent to the power amplifier of base station module; The data of power amplifier after with frequency conversion are carried out power amplification and are handled, and launch via antenna.
Wherein, base station module is handled the wireless signal of antenna input and comprised: the low noise amplifier wireless signal of base station module carries out processing and amplifying, and the wireless signal after will amplifying sends to the reception link of base station module; The wireless signal frequency conversion that will receive after link will amplify is a baseband digital signal, and baseband digital signal is sent to the radio base band modem module of base station module; The radio base band modem module carries out demodulation process to baseband digital signal, obtains original service signal, and original service signal is sent to the primary processor of base station module; Primary processor is packaged as ethernet frame with original service signal, and ethernet frame is sent to the cable modem module.
By means of technical scheme of the present invention; Through using the data between cable of cable TV transmission base station and the base station controller; Can solve in the correlation technique and when developing into mobile communications operator or full-service operator, not have the problem of wireless communication system cut-in method cheaply for cable television operators; Can make full use of the existing resource of cable television operators; Basically do not transforming under the situation of operator's existing network, need not to take up an area of the space, need not cable laying and optical cable and realize the covering of wireless communication signal with few quantities and extremely low cost.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the sketch map of wireless communication system architecture in the correlation technique;
Fig. 2 is the sketch map of outdoor mobile communication base station in the correlation technique;
Fig. 3 is the sketch map of the cable television operators network architecture in the correlation technique;
Fig. 4 is a cable of cable TV configuration diagram in the correlation technique;
Fig. 5 is an electric pole construction of line sketch map in the correlation technique;
Fig. 6 is the sketch map according to the wireless communication system of the embodiment of the invention;
Fig. 7 is the network architecture sketch map according to the cable television operators of the embodiment of the invention;
Fig. 8 is the sketch map according to the base station of the embodiment of the invention;
Fig. 9 is the sketch map according to the wireless communication data of the embodiment of the invention and cable TV signal coexistence;
Figure 10 is the sketch map according to the base station module of the embodiment of the invention;
Figure 11 is the flow chart according to the radio switch-in method of the embodiment of the invention.
Embodiment
Functional overview
At present, cable television operators hope to develop into mobile communications operator or full-service operator, still, in correlation technique, do not have wireless communication system cut-in method cheaply.For this reason, the invention provides a kind of wireless communication system, radio switch-in method and base station, in technical scheme of the present invention, novel base station adopts the hanging wire mode to install and use cable of cable TV transmission data and power supply; The antenna that is connected with the base station can be hung on line or be fixed on the electric pole.In addition, the present invention also provides a kind of radio switch-in method based on above-mentioned novel base station, and cable of cable TV transmits the data between base station and the base station controller in transmission cable TV signal and Internet data, and is the base station power supply; The base station communicates through cable of cable TV and base station controller, and carries out wireless transmission through the travelling carriage in air interface and its overlay area.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
System embodiment
According to embodiments of the invention, a kind of wireless communication system is provided, Fig. 6 is the sketch map according to the wireless communication system of the embodiment of the invention, and is as shown in Figure 6, comprising: base station 60, cable of cable TV 62 and the antenna 64 that is connected with base station 60.Describe in the face of wireless communication system down according to the embodiment of the invention.
System at first need make up a kind of femto cell 60, is used for carrying out wireless transmission through the travelling carriage in air interface and its overlay area, and communicates through cable of cable TV 62 and base station controller, and this base station 60 can be directly installed on the load-bearing wirerope; In order to realize wireless communication data and existing TV signal common transmitted, cable of cable TV 62 also need transmit the data between base station 60 and the base station controller in transmission cable TV signal, Internet data, and is base station 60 power supplies; In addition, said system also comprises the antenna 64 that is connected with base station 60, and antenna 64 can receive and send radiofrequency signal for base station 60.
As shown in Figure 7; The power supply of base station 60 is through cable of cable TV 62 supplies; Data also through cable of cable TV 62 transmission, can be delivered to cable TV signal on the TV in the family through cable of cable TV 62, can also Internet data be passed in the computer in the family through the CM of family; In addition; Base station 60 and the data between the base station controller in transmission on the cable of cable TV 62 can also send to wide area network through the CMTS of operator, and send to base station controller or WMG through wide area network, thereby realize the access of mobile communication core net.
Below, in conjunction with accompanying drawing, the concrete structure of above-mentioned base station 60 is carried out detailed explanation.Fig. 8 is the sketch map according to the base station of the embodiment of the invention, and is as shown in Figure 8, comprises according to the base station 60 of the embodiment of the invention: signal distribution module 80, cable modem module 82, base station module 84, power module 86.Below, above-mentioned each module is described.
As shown in Figure 8; After cable of cable TV 62 access base stations 60; Be high-frequency signal and Alternating Current Power Supply signal with the data separating that cable of cable TV 62 transmits at first through a passive signal distribution module 80; Wherein, signal distribution module 80 sends to cable modem module 82 with high-frequency signal, and the Alternating Current Power Supply signal is sent to power module 86; The Alternating Current Power Supply signal that 86 pairs of power modules receive carries out the AC/DC conversion, produces base station 60 inner each module required voltages, is base station 60 power supplies; Cable modem module 82 down directions carry out modulation to the high-frequency signal that receives; The packing data that modulatedemodulate is accessed sends to base station module 84; And become analog signal transmission on the cable of cable TV 62 (that is, at up direction base station module being passed the packet of coming is modulated on the channel of cable of cable TV) data-modulated of base station module 84 output; Simultaneously, cable of cable TV 62 also will be received the cascade of the equipment of realizing on the output port, and cable of cable TV 62 output ports not necessarily can be realized through external distributor with being connected also of next stage equipment.
Base station module 84 is core processing module of base station 60; Be mainly used in the data of cable modem module 82 inputs are handled; Launch through antenna 64, and the wireless signal of antenna 64 inputs is handled, the data after handling are sent to cable modem module 82.
Need to prove that according to concrete needs, cable modem module 82 can be supported cable of cable TV modulation standards such as DOCSIS, European DOCSIS, with the data-modulated between base station 60 and the base station controller to cable of cable TV 62.
Be example with the DOCSIS standard, as shown in Figure 9, down direction, data-modulated is to the empty channel of 88M-860MHz; Up direction, data-modulated can be selected bandwidth according to actual needs to the frequency band of 5M-42MHz.Like this, data communication just can be accomplished through the base station controller on cable TV network and the public network under the situation that does not influence the cable TV signal transmission in base station 60.In addition, the down going channel of European DOCSIS is 108M-862MHz, and data feedback channel is 5M-65MHz, and implementation is identical with the DOCSIS standard.
Below in conjunction with accompanying drawing; Base station module 84 is carried out detailed explanation; Shown in figure 10, base station module 84 comprises: primary processor 102, radio base band modem module (Modem) 104, digital intermediate frequency circuit 106, transmitting chain (TX) 108, power amplifier (PA) 110, low noise amplifier (LNA) 112, reception link (RX) 114.In addition, need to prove that the ancillary equipment among Figure 10 comprises the equipment such as power supply, clock, internal memory that the base station is played the support effect, no longer carries out detailed explanation below.
Base station module 84 can carry out communication through air interface and portable terminal, also can pass through Ethernet and 82 communications of cable modem module, and carries out communication through cable modem module 82 and base station controller or equipment of the core network.
The major function of base station module 84 is: the modulation and demodulation of base band, the emission of RF signal and demodulation, wireless resource allocation, call treatment etc.Particularly, the primary processor 102 of base station module 84 is used for the data of cable modem module input and the original service signal that radio base band modem module 104 is exported are carried out the conversion of host-host protocol; Baseband digital signal modulation after radio base band modem module 104 is used for the data after primary processor 102 conversion are carried out modulation and will receive link 114 frequency conversions is original service signal; Digital intermediate frequency circuit 106 is used for the data after 104 modulation of radio base band modem module are carried out IF process; Transmitting chain 108 is used for the data that digital intermediate-frequency circuit carries out after the IF process are carried out frequency-conversion processing, and the data after the frequency-conversion processing are outputed to power amplifier 110; Power amplifier 110 is used for that the data of input are carried out power amplification to be handled, and the data after will handling export antenna 64 to; Low noise amplifier 112 is used for the wireless signal that antenna 64 receives is carried out processing and amplifying; Receiving the wireless signal frequency conversion that link 114 is used for low noise amplifier is carried out after the processing and amplifying is baseband digital signal.
Below, the signal processing of the forward direction in the base station module 84 (base station controller is to the direction of base station) and reverse (base station is to the direction of base station controller) is described.
Forward direction
The business datum of sending from base station controller is through cable of cable TV 62 entering base stations 60; Accomplish the conversion of host-host protocol at primary processor 102; And arriving modem module (above-mentioned radio base band modem module 104) through internal interface, radio base band modem module 104 is modulated it, and the data after will modulating send to digital intermediate frequency unit 106; After intermediate frequency unit 106 is handled accordingly; Be dealt into transmitting chain 108 again and carry out up-conversion, send to power amplifier 110 and filter at last, and launch through antenna 64.
Oppositely
The reverse wireless signal that sends from antenna 64 sends to reception link 114 after low noise amplifier 112 amplifies; Down-convert to baseband digital signal through receiving link 114; Radio base band modem module 104 carries out demodulation to it; Obtain original service signal and send to primary processor 102, be packaged into ethernet frame, send to base station controller through cable of cable TV 62 then through primary processor 102.In addition, in practical application, can dispose one or two antennas according to actual needs; For part wireless telecommunications standard, also need increase the GPS receiver module, be used to realize the clock synchronization of base station; Wherein, the gps signal reception antenna directly is fixed on the shell of base station, and gps antenna can rush at sky.
Base station weight
In practical application, for base station 60 can be installed on the load-bearing wirerope, must earlier will be with base station 60 miniaturizations.Because the main purpose of load-bearing wirerope mainly is in order between electric pole, to set up cable and optical cable; Its heavy burden ability more limited (being generally less than 15kg); Therefore, the quality that is installed in base station and antenna on the wirerope need satisfy the requirement of wirerope heavy burden ability, must be small and light as much as possible; On concrete the realization, can adopt the design and the multiple terminal chip of high integration, reduce device and connector quantity, save equipment volume.
System power dissipation
In order to let base station 60 can use cable of cable TV 62 to supply power, system power dissipation must be by strict restriction.Cable of cable TV 62 is a kind of asymmetrical coaxial cables, consider from secure context, and be not suitable for high voltage power transmission, and cable of cable TV 62 supply currents also is limited.
In practical application, charger is the alternating current that cable of cable TV 62 provides 60-90V, and maximum current is 6A, and charger need be given a plurality of trunk amplifier power supplies on this cable, and generally speaking, the power of each grade equipment can not surpass 35W.Therefore, base station 60 necessary high efficiency, low-power consumption.On concrete the realization, for saving power consumption, can use terminal chip in a large number, improve the conversion efficiency of power amplifier; In addition, on heat dissipation design, adopt the natural cooling mode to carry out, thus the power consumption of cancellation fan.
Equipment is installed
By means of technique scheme, can realize realizing the backland low-cost wireless network coverage through merging with the wireless communication base station microminiaturization and with cable TV network.But, need to prove that above-mentioned implementation can increase the supply load of existing network, the cable of cable TV of part power shortage need increase the line powering device.
Device embodiment
According to embodiments of the invention; A kind of base station is provided; Fig. 8 is the block diagram according to the base station of the embodiment of the invention, and is as shown in Figure 8, comprises according to the base station of the embodiment of the invention: signal distribution module 80, cable modem module 82, base station module 84, power module 86.In system embodiment, each module in the base station has been carried out detailed explanation, in the present embodiment, some details are repeated no more.Below, above-mentioned each module is described.
As shown in Figure 8; After the cable of cable TV access base station; Be high-frequency signal and Alternating Current Power Supply signal with the data separating that cable of cable TV transmits at first through a passive signal distribution module 80; Wherein, signal distribution module 80 sends to cable modem module 82 with high-frequency signal, and the Alternating Current Power Supply signal is sent to power module 86; The Alternating Current Power Supply signal that 86 pairs of power modules receive carries out the AC/DC conversion, produces each module required voltage of inside of base station, is the base station power supply; Cable modem module 82 down directions carry out modulation to the high-frequency signal that receives; The packing data that modulatedemodulate is accessed sends to base station module 84; And become analog signal on cable of cable TV, transmit (that is the packet of, at up direction the base station module biography being come is modulated on the channel of cable of cable TV) data-modulated of base station module 84 output; Simultaneously, cable of cable TV also will be received the cascade of the equipment of realizing on the output port, and the cable of cable TV output port not necessarily can be realized through external distributor with being connected also of next stage equipment.
Base station module 84 is core processing module of base station; Be mainly used in the data of cable modem module 82 inputs are handled; Launch through antenna, and the wireless signal of antenna input is handled, the data after handling are sent to cable modem module 82.
Below in conjunction with accompanying drawing; Base station module 84 is carried out detailed explanation; Shown in figure 10, base station module 84 comprises: primary processor 102, radio base band modem module (Modem) 104, digital intermediate frequency circuit 106, transmitting chain (TX) 108, power amplifier (PA) 110, low noise amplifier (LNA) 112, reception link (RX) 114.
Base station module 84 can carry out communication through air interface and portable terminal, also can pass through Ethernet and 82 communications of cable modem module, and carries out communication through cable modem module 82 and base station controller or equipment of the core network.
The major function of base station module 84 is: the modulation and demodulation of base band, the emission of RF signal and demodulation, wireless resource allocation, call treatment etc.Particularly, the primary processor 102 of base station module 84 is used for the data of cable modem module input and the original service signal that radio base band modem module 104 is exported are carried out the conversion of host-host protocol; Baseband digital signal modulation after radio base band modem module 104 is used for the data after primary processor 102 conversion are carried out modulation and will receive link 114 frequency conversions is original service signal; Digital intermediate frequency circuit 106 is used for the data after 104 modulation of radio base band modem module are carried out IF process; Transmitting chain 108 is used for the data that digital intermediate-frequency circuit carries out after the IF process are carried out frequency-conversion processing, and the data after the frequency-conversion processing are outputed to power amplifier 110; Power amplifier 110 is used for that the data of input are carried out power amplification to be handled, and the data after will handling export antenna to; Low noise amplifier 112 is used for the wireless signal that antenna receives is carried out processing and amplifying; Receiving the wireless signal frequency conversion that link 114 is used for low noise amplifier is carried out after the processing and amplifying is baseband digital signal.
Below, the signal processing of the forward direction in the base station module 84 (base station controller is to the direction of base station) and reverse (base station is to the direction of base station controller) is described.
Forward direction
The business datum of sending from base station controller gets into the base station through cable of cable TV; Accomplish the conversion of host-host protocol at primary processor 102; And arriving modem module (above-mentioned radio base band modem module 104) through internal interface, radio base band modem module 104 is modulated it, and the data after will modulating send to digital intermediate frequency unit 106; After intermediate frequency unit 106 is handled accordingly; Be dealt into transmitting chain 108 again and carry out up-conversion, send to power amplifier 110 and filter at last, and launch through antenna.
Oppositely
, low noise amplifier 112 sends to reception link 114 after amplifying from the reverse wireless signal of antenna transmission; Down-convert to baseband digital signal through receiving link 114; Radio base band modem module 104 carries out demodulation to it; Obtain original service signal and send to primary processor 102, be packaged into ethernet frame, send to base station controller through cable of cable TV then through primary processor 102.In addition, in practical application, can dispose one or two antennas according to actual needs; For part wireless telecommunications standard, also need increase the GPS receiver module, be used to realize the clock synchronization of base station; Wherein, the gps signal reception antenna directly is fixed on the shell of base station, and gps antenna rushes at sky.
Base station weight
In practical application, for the base station can be installed on the load-bearing wirerope, must earlier will be with the base station miniaturization.Because the main purpose of load-bearing wirerope mainly is in order between electric pole, to set up cable and optical cable; Its heavy burden ability more limited (being generally less than 15kg); Therefore, the quality that is installed in base station and antenna on the wirerope need satisfy the requirement of wirerope heavy burden ability, must be small and light as much as possible; On concrete the realization, can adopt the design and the multiple terminal chip of high integration, reduce device and connector quantity, save equipment volume.
Method embodiment
According to embodiments of the invention, a kind of radio switch-in method is provided, Figure 11 is the flow chart according to the radio switch-in method of the embodiment of the invention, and is shown in figure 11, comprises following processing (step S1102-step S1104):
Step S1102, cable of cable TV transmit the data between base station and the base station controller in transmission cable TV signal and Internet data, and are the base station power supply;
Step S1104, the base station communicates through cable of cable TV and base station controller, and carries out wireless transmission through the travelling carriage in air interface and its overlay area.
Particularly; After the cable of cable TV access base station; Be high-frequency signal and Alternating Current Power Supply signal with the data separating that cable of cable TV transmits at first through a passive signal distribution module; Wherein, signal distribution module sends to the cable modem module with high-frequency signal, and the Alternating Current Power Supply signal is sent to power module; The Alternating Current Power Supply signal that electric power source pair of module receives carries out the AC/DC conversion, produces each module required voltage of inside of base station, is the base station power supply;
Cable modem module down direction carries out demodulation to the high-frequency signal that receives; The packet that demodulates is sent to base station module; And become analog signal on cable of cable TV, transmit (that is the packet of, at up direction the base station module biography being come is modulated on the channel of cable of cable TV) data-modulated of base station module output; Simultaneously, cable of cable TV also will be received the cascade of the equipment of realizing on the output port, and the cable of cable TV output port not necessarily can be realized through external distributor with being connected also of next stage equipment.
Below, the signal processing flow of the forward direction in the base station module (base station controller is to the direction of base station) and reverse (base station is to the direction of base station controller) is described.
Forward direction: the primary processor of base station module carries out the conversion of host-host protocol, and the data after will changing send to the radio base band modem module of base station module through internal interface; Data after the radio base band modem module is changed primary processor are carried out modulation, and the data after will modulating send to the digital intermediate frequency circuit of base station module; The digital intermediate frequency circuit carries out IF process to the data after modulating, at the transmitting chain that the data after the IF process is sent to base station module; The data of transmitting chain after to IF process are carried out frequency-conversion processing, and the data after the frequency conversion are sent to the power amplifier of base station module; The data of power amplifier after with frequency conversion are carried out power amplification and are handled, and launch via antenna.
Oppositely: the low noise amplifier wireless signal of base station module carries out processing and amplifying, and the wireless signal after will amplifying sends to the reception link of base station module; The wireless signal frequency conversion that will receive after link will amplify is a baseband digital signal, and baseband digital signal is sent to the radio base band modem module; The radio base band modem module carries out demodulation process to baseband digital signal, obtains original service signal, and original service signal is sent to primary processor; Primary processor is packaged as ethernet frame with original service signal, and ethernet frame is sent to the cable modem module.
By means of technical scheme of the present invention; Through using the data between cable of cable TV transmission base station and the base station controller; Can solve in the correlation technique and when developing into mobile communications operator or full-service operator, not have the problem of wireless communication system cut-in method cheaply for cable television operators; Can make full use of the existing resource of cable television operators; Basically do not transforming under the situation of operator's existing network, need not to take up an area of the space, need not cable laying and optical cable and realize the covering of wireless communication signal with few quantities and extremely low cost.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a wireless communication system is characterized in that, comprising:
The base station is used for carrying out wireless transmission through the travelling carriage in air interface and its overlay area, and communicates through cable of cable TV and base station controller;
Said cable of cable TV is used to transmit the data of transmitting between cable TV signal, Internet data and said base station and the said base station controller, and is the power supply of said base station;
Antenna is connected with said base station, is used to said base station and receives and send radiofrequency signal;
Wherein, said base station comprises:
Signal distribution module, the data separating that is used for said cable of cable TV transmission is high-frequency signal and Alternating Current Power Supply signal, and said high-frequency signal is sent to the cable modem module, and said Alternating Current Power Supply signal is sent to power module;
Said cable modem module is used for said high-frequency signal is carried out modulation, and the data after the modulation are sent to base station module, and becomes analog signal on cable of cable TV, to transmit the data-modulated of said base station module output;
Said base station module is used for the data of said cable modem module input are handled, and launches through antenna, and the wireless signal of said antenna input is handled, and the data after handling are sent to said cable modem module;
Said power module is used for the said Alternating Current Power Supply signal that receives is handled, and is the power supply of said base station.
2. system according to claim 1 is characterized in that, said base station module comprises:
Primary processor is used for the data of said cable modem module input and the original service signal that the radio base band modem module is exported are carried out the conversion of host-host protocol;
Said radio base band modem module, the baseband digital signal modulation after being used for the data after the conversion of said primary processor are carried out modulation and will receive the link frequency conversion is said original service signal;
The digital intermediate frequency circuit is used for the data after the modulation of said radio base band modem module are carried out IF process;
Transmitting chain is used for the data that said digital intermediate frequency circuit carries out after the IF process are carried out frequency-conversion processing, and the data after the frequency-conversion processing is outputed to power amplifier;
Said power amplifier is used for that the data of input are carried out power amplification and handles, and the data after will handling exports said antenna to;
Low noise amplifier is used for the said wireless signal that said antenna receives is carried out processing and amplifying;
Said reception link, the said wireless signal frequency conversion that is used for said low noise amplifier is carried out after the processing and amplifying is said baseband digital signal.
3. a base station is characterized in that, comprising:
Signal distribution module, the data separating that is used for the cable of cable TV transmission is high-frequency signal and Alternating Current Power Supply signal, and said high-frequency signal is sent to the cable modem module, and said Alternating Current Power Supply signal is sent to power module;
Said cable modem module is used for said high-frequency signal is carried out modulation, and the data after the modulation are sent to base station module, and becomes analog signal on cable of cable TV, to transmit the data-modulated of base station module output;
Said base station module is used for the data of said cable modem module input are handled, and launches through antenna, and the wireless signal of said antenna input is handled, and the data after handling are sent to said cable modem module;
Said power module is used for the said Alternating Current Power Supply signal that receives is handled, and is the power supply of said base station.
4. base station according to claim 3 is characterized in that, said base station module comprises:
Primary processor is used for the data of said cable modem module input and the original service signal that the radio base band modem module is exported are carried out the conversion of host-host protocol;
Said radio base band modem module, the baseband digital signal modulation that is used for the data after the conversion of said primary processor are carried out modulation and will be received the link frequency conversion is said original service signal;
The digital intermediate frequency circuit is used for the data after the modulation of said radio base band modem module are carried out IF process;
Transmitting chain is used for the data that said digital intermediate frequency circuit carries out after the IF process are carried out frequency-conversion processing, and the data after the frequency-conversion processing is outputed to power amplifier;
Said power amplifier is used for that the data after the said transmitting chain frequency conversion of input are carried out power amplification and handles, and the data after will handling exports said antenna to;
Low noise amplifier is used for the said wireless signal that said antenna receives is carried out processing and amplifying;
Said reception link, the said wireless signal frequency conversion that is used for said low noise amplifier is carried out after the processing and amplifying is said baseband digital signal.
5. a radio switch-in method is characterized in that, comprising:
Cable of cable TV is in transmission cable TV signal and Internet data; Data between transmission base station and the base station controller; And be the power supply of said base station; Wherein, said cable of cable TV is that the processing that said base station supplies power comprises: said signal of base station distribution module sends to power module with the Alternating Current Power Supply signal; The said Alternating Current Power Supply signal that said electric power source pair of module receives is handled, and is the power supply of said base station;
Said base station communicates through said cable of cable TV and said base station controller, and carries out wireless transmission through the travelling carriage in air interface and its overlay area;
Wherein, said base station communicates through said cable of cable TV and said base station controller and comprises:
Said signal of base station distribution module is high-frequency signal and Alternating Current Power Supply signal with the data separating of cable of cable TV transmission, and said high-frequency signal is sent to the cable modem module;
Said cable modem module is carried out modulation to said high-frequency signal, and the data after the modulation are sent to base station module, and becomes analog signal on cable of cable TV, to transmit the data-modulated of base station module output;
Said base station module is handled the data of said cable modem module input, launches through antenna, and the wireless signal of said antenna input is handled, and the data after handling are sent to said cable modem module.
6. method according to claim 5 is characterized in that, said base station module is handled the data of said cable modem module input and comprised:
The primary processor of said base station module carries out the conversion of host-host protocol, and the data after will changing send to the radio base band modem module of said base station module through internal interface;
Data after said radio base band modem module is changed said primary processor are carried out modulation, and the data after will modulating send to the digital intermediate frequency circuit of said base station module;
The data of said digital intermediate frequency circuit after to said modulation are carried out IF process, at the transmitting chain that the data after the IF process is sent to said base station module;
The data of said transmitting chain after to said IF process are carried out frequency-conversion processing, and the data after the frequency conversion are sent to the power amplifier of said base station module;
The data of said power amplifier after with said frequency conversion are carried out power amplification and are handled, and launch via antenna.
7. method according to claim 5 is characterized in that, said base station module is handled the wireless signal of said antenna input and comprised:
The low noise amplifier of said base station module carries out processing and amplifying to said wireless signal, and the wireless signal after will amplifying sends to the reception link of said base station module;
The wireless signal frequency conversion of said reception link after with said amplification is baseband digital signal, and said baseband digital signal is sent to the radio base band modem module of said base station module;
Said radio base band modem module carries out demodulation process to said baseband digital signal, obtains original service signal, and said original service signal is sent to the primary processor of said base station module;
Said primary processor is packaged as ethernet frame with said original service signal, and said ethernet frame is sent to the cable modem module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910000197A CN101478723B (en) | 2009-01-16 | 2009-01-16 | Wireless communication system, wireless access method and base station |
| PCT/CN2009/073934 WO2010081333A1 (en) | 2009-01-16 | 2009-09-15 | Wireless communication system, wireless access method and base station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910000197A CN101478723B (en) | 2009-01-16 | 2009-01-16 | Wireless communication system, wireless access method and base station |
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| CN101478723A CN101478723A (en) | 2009-07-08 |
| CN101478723B true CN101478723B (en) | 2012-09-05 |
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| CN101478723B (en) * | 2009-01-16 | 2012-09-05 | 中兴通讯股份有限公司 | Wireless communication system, wireless access method and base station |
| CN106067956B (en) * | 2016-05-31 | 2019-04-09 | 广州视源电子科技股份有限公司 | Separate the RF signal of Mixed design and the circuit and method of power supply signal |
| CN111614850B (en) * | 2020-04-15 | 2021-03-19 | 北京瀚诺半导体科技有限公司 | Wall-in type coaxial cable modulation and demodulation device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380774A (en) * | 2002-05-21 | 2002-11-20 | 顾士平 | Fifth-genration large-unified rireless network system |
| CN1516498A (en) * | 2003-08-30 | 2004-07-28 | 王甘雨 | Wireless broadband access transmission network base station |
| CN2660657Y (en) * | 2003-11-01 | 2004-12-01 | 江苏亨通光电股份有限公司 | Self-sustaining photoelectric compound cable |
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| JP2008236185A (en) * | 2007-03-19 | 2008-10-02 | Toshiba Corp | Wireless communication system and its incommunicable area countermeasure method |
| CN101478723B (en) * | 2009-01-16 | 2012-09-05 | 中兴通讯股份有限公司 | Wireless communication system, wireless access method and base station |
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- 2009-01-16 CN CN200910000197A patent/CN101478723B/en active Active
- 2009-09-15 WO PCT/CN2009/073934 patent/WO2010081333A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380774A (en) * | 2002-05-21 | 2002-11-20 | 顾士平 | Fifth-genration large-unified rireless network system |
| CN1516498A (en) * | 2003-08-30 | 2004-07-28 | 王甘雨 | Wireless broadband access transmission network base station |
| CN2660657Y (en) * | 2003-11-01 | 2004-12-01 | 江苏亨通光电股份有限公司 | Self-sustaining photoelectric compound cable |
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| CN101478723A (en) | 2009-07-08 |
| WO2010081333A1 (en) | 2010-07-22 |
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