CN101740864A - Electric-adjusting antenna communication system and method - Google Patents
Electric-adjusting antenna communication system and method Download PDFInfo
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- CN101740864A CN101740864A CN 200810177537 CN200810177537A CN101740864A CN 101740864 A CN101740864 A CN 101740864A CN 200810177537 CN200810177537 CN 200810177537 CN 200810177537 A CN200810177537 A CN 200810177537A CN 101740864 A CN101740864 A CN 101740864A
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Abstract
The invention discloses an electric-adjusting antenna communication system and a method. The system comprises a base station side control unit and an electric-adjusting antenna remote control unit which are connected by a radio frequency cable. The base station side control unit is used for combining a direct current power supply signal, an antenna calibration radio frequency signal and a demodulated electric-adjusting antenna control signal into a first combining radio frequency signal, and sends the first combing radio frequency signal to the electric-adjusting antenna remote control unit through the radio frequency cable. Compared with the system and the traditional method, the invention overcomes the defects of multiple transmission signals, complicated connection, low reliability and the like between equipment at the base station side and equipment at the antenna side, realizes the decrease of difficulty, development cost, engineering installation complexity and the like at different degrees in design, and enhances the efficiency of the electric-adjusting antenna communication.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of electric-adjusting antenna communication system and method.
Background technology
In the present mobile radio communication of China,, therefore trend towards adopting electrical tilt antenna or dual polarized antenna to replace mechanical antenna in high traffic density district because mechanical antenna is difficult to solve user's high density area call loss height, disturbs big problem.In addition, in regular maintenance, it is convenient like that the adjustment of mechanical antenna can not show a candle to electrical tilt antenna, and do not reach the effect of monitoring in real time and adjusting, and adjusts stepping accuracy also not high (mechanical antenna stepping accuracy is 1 degree, and the electrical tilt antenna stepping accuracy is 0.1 degree).In the face of the growth requirement of electrical tilt antenna, the communication means of base station side and electrical tilt antenna side is also in continuous evolution.
In existing electrical tilt antenna communication means, adopting the RS485 bus method is to use more a kind of method.But this method exists certain limitation, the main performance in the following areas:
(1) because the needs of electrical tilt antenna, between base station and antenna, need the signal type that transmits more, comprise antenna to calibrate radio frequency RF (Radio Frequency) signal, dc power signal and electrical tilt antenna control signal, as shown in Figure 1, the RS485 method need be passed through antenna to calibrate radio frequency RF holding wire (transmit antenna calibrate radio frequency RF signal) on a multicore cable, direct current supply line (transmission dc power signal) and RS485 holding wire (RS485 is a kind of communication protocol, and what transmit on the RS485 holding wire is electrical tilt antenna control signal or electrical tilt antenna status signal) are connected to antenna side; Among Fig. 1, " RS485 " of base station side is used for indicating and needs the RS485 interface in base station side that " RF cable " expression is used for transmitting the cable of RF signal.Need in the RS485 method to use multicore cable, relatively waste the transmission cable resource;
(2) because the special relationship between antenna and base station, must carry out lightning Protection Design by between, adopt the method for RS485 bus to carry out lightning Protection Design to above-mentioned multiple signal, comprise antenna to calibrate radio frequency RF signal lighting protection, dc power signal lightning protection and the lightning protection of electrical tilt antenna control signal etc., this just means the lightning protection problem that will consider multiple signal between base station side radio frequency remote unit RRU (Radio Remote Unit) and electrical tilt antenna remote control unit RCU (Remote Control Unit), this has increased the difficulty of lightning Protection Design undoubtedly, thereby the minimizing signal reliability reduces antenna communication efficient.
In view of this, no matter communication means based on the RS485 bus method is on the problems such as reliability, development cost and project installation of the difficulty that realizes design, system works, all exist more defective, need a kind of new electrical tilt antenna communication means and system to overcome the problems referred to above.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of electric-adjusting antenna communication system and method, saves the transmission cable resource, reduces the complexity of signal lighting protection design, improves signal reliability, improves the efficient of electrical tilt antenna communication.
In order to address the above problem, the invention provides a kind of electric-adjusting antenna communication system, comprise base station side control unit and electrical tilt antenna remote control unit, described base station side control unit links to each other by radio frequency cable with described electrical tilt antenna remote control unit; Described base station side control unit is used for that the electrical tilt antenna control signal after dc power signal, antenna to calibrate radio frequency signal and the modulation is merged into first and is sent to described electrical tilt antenna remote control unit by described radio frequency cable after closing the road radiofrequency signal.
Further, described electrical tilt antenna remote control unit is used for that the electrical tilt antenna status signal after antenna to calibrate radio frequency signal and the modulation is merged into second and is sent to described base station side control unit by described radio frequency cable after closing the road radiofrequency signal.
Further, described base station side control unit comprises base station side Remote Radio Unit and electrical tilt antenna modulating and demodulating signal module; Described electrical tilt antenna modulating and demodulating signal module comprises that the transmitting-receiving selection and the modulating unit and first that link to each other successively close the road control unit; Described base station side Remote Radio Unit is used for sending electrical tilt antenna control signal and electrical tilt antenna transmitting-receiving control signal to described transmitting-receiving selection and modulating unit; Also be used for closing the road control unit and send described dc power signal and described antenna to calibrate radio frequency signal to described first; Described transmitting-receiving selection and modulating unit, the described electrical tilt antenna control signal and the described electrical tilt antenna transmitting-receiving control signal that are used for receiving are merged into a transmitting-receiving selection and a modulator control signal, the high-low level of described transmitting-receiving selection and modulator control signal switches that high level in the process is held time and low level is held time all less than time of default during thresholding, the high-low level switching state of described transmitting-receiving selection and modulator control signal is represented the transmission indication of electrical tilt antenna transmitting-receiving control signal, described transmitting-receiving selection and modulator control signal are as the electrical tilt antenna control signal, described transmitting-receiving selection and modulating unit are corresponding to the varying level state modulation output on-off keying sequence of described transmitting-receiving selection and modulator control signal, electrical tilt antenna control signal as after the modulation is sent to described first and closes the road control unit; Described first closes the road control unit, is used for that the electrical tilt antenna control signal after described dc power signal, described antenna to calibrate radio frequency signal and the modulation is merged into first and is sent to described electrical tilt antenna remote control unit after closing the road radiofrequency signal.
Further, described electrical tilt antenna remote control unit comprises second and closes the road control unit; Described electrical tilt antenna modulating and demodulating signal module also comprises the electric transfer receipts that link to each other with described transmitting-receiving selection and modulating unit and demodulating unit, the calibrating signal filter unit that links to each other with described electric transfer receipts and demodulating unit; Described second closes the road control unit, is used for the electrical tilt antenna status signal after antenna to calibrate radio frequency signal and the modulation and merges into second and close the road radiofrequency signal and close the road control unit after be sent to described first by described radio frequency cable; Described first closes the road control unit, also be used for closing road control unit reception second from described second and close the road radiofrequency signal, and the electrical tilt antenna status signal that therefrom parses after the modulation is sent to described transmitting-receiving selection and modulating unit; Therefrom parse the antenna to calibrate radio frequency signal and be sent to the calibrating signal filter unit; Described transmitting-receiving selection and modulating unit, be used for keeping high level or low level time greater than described time of default during thresholding at described transmitting-receiving selection and modulator control signal, level was kept the reception indication of state representation electrical tilt antenna transmitting-receiving control signal when this of described transmitting-receiving selection and modulator control signal was long, described transmitting-receiving selection and modulating unit be from the described first electrical tilt antenna status signal that closes after the road control unit receives modulation, and be sent to described electric transfer receipts and demodulating unit; Described electric transfer receipts and demodulating unit are used for the electrical tilt antenna status signal after the modulation is carried out demodulation, and the electrical tilt antenna status signal that obtains is sent to described base station side Remote Radio Unit; Described calibrating signal filter unit carries out being sent to the base station side Remote Radio Unit after the filtering after closing road control unit reception antenna calibrate radio frequency signal from described first.
Further, described base station side control unit comprises base station side Remote Radio Unit and electrical tilt antenna modulating and demodulating signal module; Described electrical tilt antenna modulating and demodulating signal module comprise successively the electricity that links to each other readjust the distribution penetrate modulation subunit, transmitting-receiving chooser unit and first closes the road control unit; Described base station side Remote Radio Unit is used for readjusting the distribution to described electricity and penetrates modulation subunit and send the electrical tilt antenna control signal, sends electrical tilt antenna transmitting-receiving control signal to described transmitting-receiving chooser unit; Also be used for closing the road control unit and send described dc power signal and described antenna to calibrate radio frequency signal to described first; Described electricity is readjusted the distribution and is penetrated modulation subunit, be used to receive the electrical tilt antenna control signal and it is carried out the on-off keying modulation, and the electrical tilt antenna control signal after will modulating is sent to described transmitting-receiving chooser unit; Described transmitting-receiving chooser unit is used for when described electrical tilt antenna transmitting-receiving control signal is designated as transmit status, will readjust the distribution from described electricity and penetrate modulation subunit and receive electrical tilt antenna control signal after the modulation and be sent to described first and close the road control unit; Described first closes the road control unit, is used for that the electrical tilt antenna control signal after described dc power signal, described antenna to calibrate radio frequency signal and the modulation is merged into first and is sent to described electrical tilt antenna remote control unit after closing the road radiofrequency signal.
Further, described electrical tilt antenna remote control unit comprises second and closes the road control unit; Described electrical tilt antenna modulating and demodulating signal module comprises that also electric transfer receipts and demodulating unit link to each other with described transmitting-receiving chooser unit; Described second closes the road control unit, is used for that the electrical tilt antenna status signal after the modulation and antenna to calibrate radio frequency signal are merged into second and closes the road signal and close the road control unit after be sent to described first by described radio frequency cable; Described first closes the road control unit, also is used for being sent to described transmitting-receiving chooser unit from the described second electrical tilt antenna status signal that closes after road control unit reception second is closed the road signal and therefrom parsed modulation; Described transmitting-receiving chooser unit also is used for when described electrical tilt antenna transmitting-receiving control signal is designated as accepting state, will be sent to described electric transfer receipts and demodulating unit from the described first electrical tilt antenna status signal that closes after the modulation that the road control unit receives; Described electric transfer receipts and demodulating unit are used for the electrical tilt antenna status signal after the modulation is carried out demodulation, and the electrical tilt antenna status signal that obtains is sent to described base station side Remote Radio Unit.
Further, described first close the road control unit and comprise first isolation module, second isolation module, radiofrequency signal isolation module; Described first isolation module is used to transmit electrical tilt antenna control signal after the modulation and the electrical tilt antenna status signal after the modulation; Described second isolation module is used to transmit the calibrate radio frequency signal; Described first isolation module and described second isolation module be all by electric capacity isolated DC power supply signal, and different according to the frequency of the electrical tilt antenna control signal after calibrate radio frequency signal and the modulation, adopts the filter circuit of different frequency to isolate mutually; Described radiofrequency signal isolation module is used to transmit dc power signal, the electrical tilt antenna control signal after isolating the calibrate radio frequency signal and modulate by magnetic bead and/or inductance.
In order to address the above problem, the invention provides a kind of electrical tilt antenna communication means, the electrical tilt antenna control signal of base station side control unit after with dc power signal, antenna to calibrate radio frequency signal and modulation merged into first and is sent to the electrical tilt antenna remote control unit by radio frequency cable after closing the road signal.
Further, the electrical tilt antenna status signal of electrical tilt antenna remote control unit after with antenna to calibrate radio frequency signal and modulation merged into second and is sent to described base station side control unit by described radio frequency cable after closing the road radiofrequency signal.
Further, the base station side Remote Radio Unit of described base station side control unit sends electrical tilt antenna control signal and electrical tilt antenna transmitting-receiving control signal to electrical tilt antenna modulating and demodulating signal module; The described electrical tilt antenna control signal that described electrical tilt antenna modulating and demodulating signal module will receive and described electrical tilt antenna transmitting-receiving control signal is merged into a transmitting-receiving selection and modulator control signal and is selected and modulator control signal advances half-duplex operation control according to this transmitting-receiving; Specifically comprise: the high-low level of described transmitting-receiving selection and modulator control signal switches in the process when high level is held time and low level is held time all in the time of default thresholding, the high-low level switching state of described transmitting-receiving selection and modulator control signal is represented the transmission indication of electrical tilt antenna transmitting-receiving control signal, described transmitting-receiving selection and modulator control signal are as the electrical tilt antenna control signal, described transmitting-receiving selection and modulating unit are corresponding to the varying level state modulation output on-off keying sequence of described transmitting-receiving selection and modulator control signal, as the electrical tilt antenna control signal after the modulation; Described transmitting-receiving selection and modulator control signal are kept high level or low level time greater than described time of default during thresholding, level was kept the reception indication of state representation electrical tilt antenna transmitting-receiving control signal when this of described transmitting-receiving selection and modulator control signal was long, and described transmitting-receiving selection and modulating unit receive the electrical tilt antenna status signal after the modulation.
Further, the base station side Remote Radio Unit of described base station side control unit sends electrical tilt antenna control signal and electrical tilt antenna transmitting-receiving control signal to electrical tilt antenna modulating and demodulating signal module; When described electrical tilt antenna modulating and demodulating signal module was designated as transmit status in described electrical tilt antenna transmitting-receiving control signal, the electrical tilt antenna control signal after described electrical tilt antenna control signal modulated and will modulate was merged into first together with dc power signal, antenna to calibrate radio frequency signal and is sent to described electrical tilt antenna remote control unit after closing the road radiofrequency signal; When described electrical tilt antenna transmitting-receiving control signal is designated as accepting state, receive second and close the road radiofrequency signal and therefrom parse modulation back electrical tilt antenna status signal, carry out after the demodulation electrical tilt antenna status signal being sent to the base station side Remote Radio Unit from the electrical tilt antenna remote control unit.
Compare with prior art, the present invention adopts the OOK modulation system and carry out the communication means of electric tonal signal by the RF cable methods between base station side RRU and electrical tilt antenna remote control unit RCU side, and following advantage is specifically arranged:
(1) on the transmitting physical path, reduces transmission cable to dc power signal and two kinds of signals of electrical tilt antenna control signal (the signal loading on these two lines to the RF cable);
(2) reduced the difficulty of lightning Protection Design,, only carried out lightning Protection Design, need not all will consider lightning Protection Design to multiple signal with the RS485 bus method at the RF cable interface as long as take a kind of measure for lightning Protection Design;
(3) to the antenna control signal speed and the carrier frequency of different rates, can automatically carry out self adaptation;
(4) electrically adjustable antenna interface is standardized more and be tending towards the standardization direction and develop.
In sum, communication means of the present invention is compared with existing RS485 communication mode with system, overcome this technology many in base station side with the antenna side transferring signals between devices, be connected shortcomings such as complicated, that reliability is low, realize that in design all there is reduction in various degree aspects such as difficulty, development cost, project installation complexity, improved the efficient of electrical tilt antenna communication.
Description of drawings
Fig. 1 is based on the electrical tilt antenna communication means schematic diagram of RS485 bus in the prior art;
Fig. 2 is based on the electrical tilt antenna communication means schematic diagram of RF cable among the present invention;
Fig. 3 is the signal transmission schematic diagram of the electrical tilt antenna communication among the present invention;
Fig. 4 is the composition frame chart of the electrical tilt antenna modulating and demodulating signal module of embodiment one among the present invention;
Fig. 5 receives and dispatches the schematic diagram that control signal is exported the OOK signal according to electrical tilt antenna control signal and electrical tilt antenna among the embodiment one among the present invention;
Fig. 6 is the composition frame chart of the electrical tilt antenna modulating and demodulating signal module of embodiment two among the present invention;
Fig. 7 is the concrete module composition diagram of electrical tilt antenna modulating and demodulating signal module of embodiment one among the present invention;
Fig. 8 is first structure chart that closes the road control unit among the embodiment one, two among the present invention.
Embodiment
Main thought of the present invention is, as shown in Figure 2, after the needed signal of a plurality of electrical tilt antennas that the base station side control unit is sent (comprising the electrical tilt antenna control signal, dc power signal and the antenna to calibrate radio frequency signal that are used to control angle that electrical tilt antenna need adjust etc.) closes the road, send to the electrical tilt antenna remote control unit via the radio frequency cable that originally is exclusively used in transmit antenna calibrate radio frequency signal, to save the transmission cable resource, also reduced the complexity of signal lighting protection design simultaneously.
As shown in Figure 3, electric-adjusting antenna communication system of the present invention comprises base station side control unit and the electrical tilt antenna remote control unit RCU (comprising electrical tilt antenna) 303 that links to each other by the RF cable, and the base station side control unit comprises base station side radio frequency remote unit RRU 301, electrical tilt antenna modulating and demodulating signal module 302 again.Electrical tilt antenna modulating and demodulating signal module 302 is as the intermediate connection point of base station side Remote Radio Unit 301 and electrical tilt antenna remote control unit 303, it is connected in series that the physical connection of these three parts is closed, between base station side Remote Radio Unit 301 and the electrical tilt antenna modulating and demodulating signal module 302, between electrical tilt antenna modulating and demodulating signal module 302 and the electrical tilt antenna remote control unit 303, all carry out the half-duplex operation transmission between any two, promptly signal is not is not received and dispatched simultaneously.
Each signal of transmission all transmits along separately path between base station side Remote Radio Unit 301 and the electrical tilt antenna modulating and demodulating signal module 302; The signal of transmission all transmits on the RF cable after closing the road between electrical tilt antenna modulating and demodulating signal module 302 and the electrical tilt antenna remote control unit 303.
Base station side Remote Radio Unit 301 sends electrical tilt antenna control signal, antenna calibration RF signal and dc power signal to electrical tilt antenna modulating and demodulating signal module 302; Electrical tilt antenna modulating and demodulating signal module 302 is closed the road with these three signals of electrical tilt antenna control signal, antenna calibration RF signal and dc power signal that receive and is sent to electrical tilt antenna remote control unit 303; The transmission direction of these three signals between base station side Remote Radio Unit 301 and electrical tilt antenna modulating and demodulating signal module 302 identical with the transmission direction between electrical tilt antenna modulating and demodulating signal module 302 and electrical tilt antenna remote control unit 303 (i.e. direction from the base station to the antenna or the direction from the antenna to the base station); But transmission means difference between the two, each signal edge path separately transmits separately between base station side Remote Radio Unit 301 and the electrical tilt antenna modulating and demodulating signal module 302, each signal between electrical tilt antenna modulating and demodulating signal module 302 and the electrical tilt antenna remote control unit 303 is closed the road together, all transmits in the mode of radio frequency through the RF cable.Electrical tilt antenna modulating and demodulating signal module 302 sends electrical tilt antenna status signal, antenna calibration RF signal to base station side Remote Radio Unit 301, the also transmission between electrical tilt antenna modulating and demodulating signal module 302 and electrical tilt antenna remote control unit 303 of these two signals, transmission means and above-mentioned electrical tilt antenna control signal, antenna calibration RF signal are identical with three transmission method of signal of dc power signal.
Specify the function of these three modules below:
Base station side Remote Radio Unit 301 is used for sending electrical tilt antenna control signal, dc power signal (being used to electrical tilt antenna modulating and demodulating signal module 302 and electrical tilt antenna remote control unit 303 that power supply is provided) and antenna calibration RF signal to electrical tilt antenna modulating and demodulating signal module 302; Also be used for receiving electrical tilt antenna status signal (comprising antenna condition and/or alarm signal) and antenna calibration RF signal from electrical tilt antenna modulating and demodulating signal module 302;
Electrical tilt antenna modulating and demodulating signal module 302, be used for receiving second and close the road radiofrequency signal from electrical tilt antenna remote control unit 303, and from then on second close and parse modulation back electrical tilt antenna status signal in the radiofrequency signal of road, this modulation back electrical tilt antenna status signal is separated the mediation detection, obtain the electrical tilt antenna status signal and send to base station side Remote Radio Unit 301, also be used for closing the road radiofrequency signal and parse the RF signal, carry out after the antenna calibration filtering transmitting antenna calibration RF signal and give base station side Remote Radio Unit 301 from second of electrical tilt antenna remote control unit 303; Also be used for receiving electrical tilt antenna control signal, antenna calibration RF signal, dc power signal from base station side Remote Radio Unit 301, and the electrical tilt antenna control signal modulated, close by its first electrical tilt antenna control signal, antenna calibration RF signal and dc power signal after closing the road control unit and will modulating and to form first behind the road and close the road radiofrequency signal, output to electrical tilt antenna remote control unit 303 by the RF cable; Also be used for the dc power signal of base station side Remote Radio Unit 301 is managed;
To the antenna calibration RF signal that electrical tilt antenna modulating and demodulating signal module 302 sends, is that other antennas paths transmitting RF signal is coupled to electrical tilt antenna from base station side Remote Radio Unit 301, and promptly other antennas paths sends, and electrical tilt antenna receives.From electrical tilt antenna modulating and demodulating signal module 302 to base station side Remote Radio Unit 301 to the antenna calibration RF signal that sends, be that electrical tilt antenna transmitting RF signal is coupled on other antennas paths and receives, be that electrical tilt antenna sends, other antennas paths is received, and the time delay of other antennas paths reception and the difference of gain can be judged by the RF signal in the base station.302 mutual RF signals of base station side Remote Radio Unit 301 and electrical tilt antenna modulating and demodulating signal module are identical, just the difference on the direction.
Electrical tilt antenna remote control unit 303, be used for receiving the electrical tilt antenna control signal that comprises after the modulation from electrical tilt antenna modulating and demodulating signal module 302, first of antenna calibration RF signal and dc power signal closes the road radiofrequency signal, second close road control unit (this second close first in road control unit and the electrical tilt antenna modulating and demodulating signal module 302 to close road control unit function corresponding) and close the road radiofrequency signal to first and resolve by it, therefrom extract the electrical tilt antenna control signal after the modulation, drive electrical tilt antenna according to this electrical tilt antenna control signal after the demodulation and carry out corresponding actions; And therefrom extract dc power signal RCU itself is powered; Electrical tilt antenna status signal after also being used for closing the road control unit and will modulating by second closes together with the RF signal and obtains second behind the road and close the road radiofrequency signal, is sent to electrical tilt antenna modulating and demodulating signal module 302 through the RF cable.
Electrical tilt antenna modulating and demodulating signal module 302 physically can be placed on separately between base station side RRU and the electrical tilt antenna remote control unit 303, also can be integrated in base station side RRU inside.Electrical tilt antenna modulating and demodulating signal module 302 is expanded on base station side RRU veneer when realizing, the connection between can the simplified system module improves the reliability of system, and saves cost.
The composition of electrical tilt antenna modulating and demodulating signal module 302 is described with two examples below:
As shown in Figure 4, in embodiment one, electrical tilt antenna modulating and demodulating signal module 302 comprises specifically that electricity is readjusted the distribution and penetrates carrier wave unit 401, electricity transfer receipts and demodulating unit 402, calibrating signal filter unit 403, Power Management Unit 404, first closes road control unit 405, and transmitting-receiving is selected and modulating unit 406;
Electricity is readjusted the distribution and is penetrated carrier wave unit 401, is used to produce carrier signal (being used for the modulation of electrical tilt antenna control signal) and selects and modulating unit 406 transmissions for transmitting-receiving;
Electricity transfer receipts and demodulating unit 402 are used for selecting and modulating unit 406 receives electrical tilt antenna status signal after the modulation from transmitting-receiving, and it is demodulated to digital signal (being the electrical tilt antenna status signal) sends to base station side Remote Radio Unit 301; Comprise signal amplification unit, diode envelope detection unit and three parts of comparison shaping output unit in electricity transfer receipts and the demodulating unit 402, the realization of this three part is all finished by an amplifier, and amplifier is to base station side Remote Radio Unit 301 output electrical tilt antenna status signals;
Calibrating signal filter unit 403 is to carrying out filtering from the first RF signal that closes 405 receptions of road control unit; Also be used for the signal from base station side Remote Radio Unit 301 reception antennas calibrations RF, carry out sending to first after the filtering and close the road control unit, this module is the reserve part to original antenna calibration partial function;
First closes road control unit 405, it is interface module with antenna side, be used for from the electrical tilt antenna control signal that transmitting-receiving is selected and modulating unit 406 receives after modulating, from calibrating signal filter unit 403 reception antennas calibration RF signal, receive dc power signal from Power Management Unit 404, and above-mentioned three signals are synthesized first close the road radiofrequency signal, send to electrical tilt antenna remote control unit 303 by the RF cable; Also be used for receiving second and close the road radiofrequency signal from electrical tilt antenna remote control unit 303, modulated electrical tilt antenna status signal that parses and antenna calibration RF signal are separated, send to transmitting-receiving respectively and select and modulating unit 406 and calibrating signal filter unit 403;
Transmitting-receiving is selected and modulating unit 406, is used for electric tonal signal is received and dispatched control; Be used for receiving electrical tilt antenna control signal and electrical tilt antenna transmitting-receiving control signal from base station side Remote Radio Unit 301, and when described electrical tilt antenna transmitting-receiving control signal is designated as transmit status, the electrical tilt antenna control signal is modulated, and the electrical tilt antenna control signal after will modulating is sent to first and closes road control unit 405; When described electrical tilt antenna transmitting-receiving control signal is designated as accepting state,, and be sent to described electric transfer receipts and demodulating unit 402 from the first electrical tilt antenna status signal that closes after road control unit 405 receives modulation.
Transmitting-receiving is selected and modulating unit 406 can adopt on-off keying (OOK, On-off keying) modulation system is modulated the electrical tilt antenna control signal, the method of OOK modulation technique realizes that principle is relatively simple, that promptly utilizes carrier signal opens and closes presentation logic 0 and logical one, for electrical tilt antenna communication, on realizing, it is mainly reflected in two aspects of OOK modulation of separating mediation electrical tilt antenna control signal of electrical tilt antenna OOK status signal.Transmitting-receiving select and modulating unit 406 with the electrical tilt antenna control signal that receives and the electrical tilt antenna transmitting-receiving control signal control signal A (also can be described as transmitting-receiving selects and modulator control signal) that permeates, high level is held time and low level when holding time all in the time of default thresholding (when being in the high-low level switching state) in the high-low level of control signal A switches process, the high-low level switching state of control signal A is represented the transmission indication of electrical tilt antenna transmitting-receiving control signal, and this moment, control signal A was as the electrical tilt antenna control signal, transmitting-receiving is selected and modulating unit 406 is a transmit status, modulate 0 and 1 on-off keying sequence corresponding to the varying level state of control signal A, as the electrical tilt antenna control signal after the modulation.As shown in Figure 5, when control signal A is low level (this moment, receiving/transmission selection switch was in transmit status), the OOK sequence of output is 1 (1 number is by the low level retention time decision of control signal A); When control signal is high level (though this moment receiving/transmission selection switch be in accepting state, but because the reason of half-duplex operation, electrical tilt antenna remote control unit 303 can not send the OOK signal to electrical tilt antenna modulating and demodulating signal module 302), output OOK sequence is 0 (0 number is by the high-level retention time decision of control signal A), be that control signal A is when the high-low level switching state, transmitting-receiving selection and modulating unit 406 are finished the modulation to the electrical tilt antenna control signal, and the signal of output is modulation back electrical tilt antenna control signal (being 0,1 sequence of OOK).The time that control signal A keeps high level is greater than time of default during thresholding, be that (this moment is because electrical tilt antenna remote control unit 303 has obtained the electricity regulation and control system order that base station side Remote Radio Unit 301 is sent when remaining high level (this moment, receiving/transmission selection switch was in accepting state) state for a long time for the level of control signal A, so can return to the execution result of base station side Remote Radio Unit 301 electricity regulation and control system orders), the reception indication of expression electrical tilt antenna transmitting-receiving control signal, transmitting-receiving is selected and modulating unit 406 is an accepting state, promptly closes road control unit 405 from first and receives the electrical tilt antenna status signal after modulating and be sent to electric transfer receipts and demodulating unit 402.In the present embodiment, high level is represented the reception indication of electrical tilt antenna transmitting-receiving control signal during with control signal A long, in other embodiments, also can low level represent to receive indication when long, and the present invention is not limited to this.
In actual applications, existing transmitting-receiving selection and modulation device have two control input ends, one input needs input control signal A, another input needs the incoming level state control signal B opposite with control signal A, realize transmitting-receiving selection and modulating unit 406 in order when realization is of the present invention, to use this device, can construct one with the opposite control signal B of control signal A level state, select and another input input of modulation device gets final product in transmitting-receiving.
As shown in Figure 6, embodiment two:
Different with embodiment one is, transmitting-receiving is selected and modulating unit 406 is readjusted the distribution by the electricity that links to each other and penetrated modulation subunit 607 and transmitting-receiving chooser unit 608 is formed; Electricity is readjusted the distribution and is penetrated modulation subunit 607 and electricity and readjust the distribution and penetrate carrier wave unit 401 and link to each other, and transmitting-receiving chooser unit 608 closes road control unit 405 with electric transfer receipts and demodulating unit 402 and first respectively and links to each other;
Electricity is readjusted the distribution and is penetrated modulation subunit 607, is used to receive the electrical tilt antenna control signal and it is carried out the on-off keying modulation, and the electrical tilt antenna control signal after the modulation is sent to transmitting-receiving chooser unit 608; It is on-off keying OOK modulation system (in the modulation industry standard of electrical tilt antenna, regulation is used the OOK modulation as the modulation system to electricity regulation and control system signal) that electricity is readjusted the distribution the modulation system of penetrating modulation subunit 607.
Transmitting-receiving chooser unit 608, be used for receiving electrical tilt antenna transmitting-receiving control signal from base station side Remote Radio Unit 301, when electrical tilt antenna transmitting-receiving control signal is designated as transmit status, is sent to first and closes road control unit 405 readjust the distribution the electrical tilt antenna control signal of penetrating after the modulation that modulation subunit 607 receives from electricity; Also be used for when electrical tilt antenna transmitting-receiving control signal is designated as accepting state,, and be sent to electric transfer receipts and demodulating unit 402 from the first electrical tilt antenna status signal that closes after road control unit 405 receives modulation.
Implementation is basic identical among the foregoing description one and the embodiment two, and electricity is readjusted the distribution and penetrated modulation subunit 607 and transmitting-receiving chooser unit 608 and merge into a unit and select and modulating unit 406 for transmitting-receiving among the embodiment one, can reduce device cost; Among the embodiment two, electricity is readjusted the distribution and is penetrated modulation subunit 607 and the 608 separately designs of transmitting-receiving chooser unit, makes two unit division of labor clear and definite.Two embodiment all can utilize the half-duplex operation characteristic of base station side Remote Radio Unit 301 and electrical tilt antenna remote control unit 303, guarantee the accuracy of electric tonal signal transceive data.
As shown in Figure 7, be the more detailed composition structure chart corresponding with embodiment one (Fig. 4), the composition of following concrete device is also identical in embodiment two (Fig. 6).
Electricity is readjusted the distribution and is penetrated carrier wave unit 401 and specifically comprise multichannel carrier selector switch 701 and carrier wave shaping device 702;
Multichannel carrier selector switch 701 is used for selecting output to importing different carrier frequency (as carrier wave 1 to carrier wave N); Different carrier frequencies produces (whether crystal oscillator works enables control by base station side RRU) by the crystal oscillator of different frequency;
Carrier wave shaping device 702, be used for the square-wave signal of multichannel carrier selector switch 701 outputs is converted to sine wave, and the carrier signal after the shaping is sent to transmitting-receiving selects and modulating unit 406, the purpose of shaping is because square-wave signal does not satisfy the requirement of electric transfer mouth spectrum mask.
Transmitting-receiving is selected and modulating unit 406, logic variation by electrical tilt antenna transmitting-receiving control signal and electrical tilt antenna control signal is carried out break-make control to the carrier signal that receives from carrier wave shaping device 702, the modulation signal that transmitting-receiving is selected and modulating unit 406 is exported just is equivalent to the electrical tilt antenna control signal has been carried out carrier modulation like this, be exactly electrical tilt antenna OOK control signal promptly from what receive and dispatch selection and modulating unit 406 outputs, the electrical tilt antenna control signal after promptly modulating.
Over-current detection device 711, the low resistance that is used for connecting on direct current supply line, powerful resistance carry out current sample, and current value is converted into magnitude of voltage; Because series impedance is less, so the pressure drop of Chan Shenging in the above is also very low;
Amplifier comparator spare 712, the magnitude of voltage that is used for over-current detection device 711 is detected output amplifies, and when detected magnitude of voltage during greater than comparator reference voltage, the output overcurrent alarm signal also reports base station side RRU, reaches the purpose of overcurrent alarm.Amplifier comparator spare 712 should be operated in stagnant ring status (promptly should have latch function), otherwise, when power circuit generation over current fault, can cause the frequent break-make of overcurrent control device 714 because detect the variation of size of current on the over-current detection device 711, thereby cause the ping-pong of power supply.
Selector 713, for " or " gate; Be used to import the power control signal of base station side Remote Radio Unit 301 outputs, because the control to electrical tilt antenna can be for a long time in working order not down, in order to reduce power consumption, base station side Remote Radio Unit 301 out-put supply control signals are controlled DC power supply, and selector 713 carries out OR operation with the signal of power control signal and 712 outputs of amplifier comparator spare;
Overcurrent control device 714 adopts high-power MOS (Metal-Oxide-Semiconductor) pipe to realize, can play the effect of overcurrent protection to DC power supply.
First closes the function that road control unit 405 realizes closing road control, for the control signal that makes electrical tilt antenna, the multiple signals such as status signal (containing alarm signal), electrical tilt antenna transmitting-receiving control signal and dc power signal of electrical tilt antenna can arrive electrical tilt antenna remote control unit 303 by the RF cable, the RF signal that transmits from electrical tilt antenna remote control unit 303 can be separated, and prevent that multiple signal from interfering with each other, as shown in figure 10, first closes road control unit 405 comprises first isolation module, second isolation module, the radiofrequency signal isolation module;
First isolation module is used to transmit the electrical tilt antenna control signal (being the OOK signal) after the modulation; Second isolation module is used for transmit antenna calibration RF signal; These two modules are all by electric capacity isolated DC power supply signal, and it is different with the frequency of electrical tilt antenna control signal after the modulation according to antenna calibration RF signal, the filter circuit of employing different frequency makes different paths can curb other signal by the signal of oneself, reaches to be independent of each other.
The radiofrequency signal isolation module, be used to transmit dc power signal, by the electrical tilt antenna control signal after inductance or magnetic bead isolated antennas calibrate radio frequency signal and the modulation, electrical tilt antenna control signal after preventing to modulate and antenna calibration effect of signals dc power signal itself; Because electric straightening stream power work current requirements is being higher than 2 amperes (this current value has change slightly according to the practical application meeting) realization overcurrent protection; so adopt power inductance; power inductance is fit to suppress low-frequency interference signal; adopt magnetic bead to suppress effect relatively good (facts have proved that power inductance adds circuit being suppressed at more than the 30dB 2G left and right sides signal of magnetic bead series connection) for the higher antenna calibration RF signal of frequency.
After merging into one road signal, the electrical tilt antenna control signal of base station side control unit after with dc power signal, antenna to calibrate radio frequency signal and modulation be sent to the electrical tilt antenna remote control unit by radio frequency cable.
Corresponding to the electric-adjusting antenna communication system of foregoing description, the electrical tilt antenna communication means comprises: be sent to the electrical tilt antenna remote control unit by radio frequency cable after the electrical tilt antenna control signal of base station side control unit after with dc power signal, antenna to calibrate radio frequency signal and modulation merged into one road signal.Concrete: when electrical tilt antenna modulating and demodulating signal module was designated as transmit status in described electrical tilt antenna transmitting-receiving control signal, the base station side Remote Radio Unit of described base station side control unit sent electrical tilt antenna control signal and electrical tilt antenna transmitting-receiving control signal to electrical tilt antenna modulating and demodulating signal module; Electrical tilt antenna control signal after electrical tilt antenna modulating and demodulating signal module is modulated and will be modulated described electrical tilt antenna control signal is merged into first together with dc power signal, antenna to calibrate radio frequency signal and is sent to described electrical tilt antenna remote control unit after closing the road radiofrequency signal.When described electrical tilt antenna transmitting-receiving control signal was designated as accepting state, electrical tilt antenna status signal after described electrical tilt antenna remote control unit will be modulated and antenna to calibrate radio frequency signal were merged into second and are closed the road radiofrequency signal after be sent to described electrical tilt antenna modulating and demodulating signal module by described radio frequency cable; Electrical tilt antenna modulating and demodulating signal module second is closed the electrical tilt antenna status signal that parses the radiofrequency signal of road after the modulation from what receive, and to the modulation after the electrical tilt antenna status signal carry out demodulation, the electrical tilt antenna status signal that obtains is sent to described base station side Remote Radio Unit.Concrete electrical tilt antenna communication means is corresponding with the associated description of said system, repeats no more herein.
The technical scheme that the present invention proposes can make the base station not only can communicate easily and between the antenna, reach the purpose of electrical adjustment antenna, and the base station can be managed also by this communication means concentratedly to many antennas.
The present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making various corresponding changes and distortion according to the present invention, and these change and be out of shape the protection range that all should belong to the appended claim of the present invention accordingly.
Claims (11)
1. an electric-adjusting antenna communication system comprises base station side control unit and electrical tilt antenna remote control unit, it is characterized in that, described base station side control unit links to each other by radio frequency cable with described electrical tilt antenna remote control unit;
Described base station side control unit is used for that the electrical tilt antenna control signal after dc power signal, antenna to calibrate radio frequency signal and the modulation is merged into first and is sent to described electrical tilt antenna remote control unit by described radio frequency cable after closing the road radiofrequency signal.
2. the system as claimed in claim 1 is characterized in that,
Described electrical tilt antenna remote control unit is used for that the electrical tilt antenna status signal after antenna to calibrate radio frequency signal and the modulation is merged into second and is sent to described base station side control unit by described radio frequency cable after closing the road radiofrequency signal.
3. system as claimed in claim 1 or 2 is characterized in that,
Described base station side control unit comprises base station side Remote Radio Unit and electrical tilt antenna modulating and demodulating signal module; Described electrical tilt antenna modulating and demodulating signal module comprises that the transmitting-receiving selection and the modulating unit and first that link to each other successively close the road control unit;
Described base station side Remote Radio Unit is used for sending electrical tilt antenna control signal and electrical tilt antenna transmitting-receiving control signal to described transmitting-receiving selection and modulating unit; Also be used for closing the road control unit and send described dc power signal and described antenna to calibrate radio frequency signal to described first;
Described transmitting-receiving selection and modulating unit, the described electrical tilt antenna control signal and the described electrical tilt antenna transmitting-receiving control signal that are used for receiving are merged into a transmitting-receiving selection and a modulator control signal, the high-low level of described transmitting-receiving selection and modulator control signal switches that high level in the process is held time and low level is held time all less than time of default during thresholding, the high-low level switching state of described transmitting-receiving selection and modulator control signal is represented the transmission indication of electrical tilt antenna transmitting-receiving control signal, described transmitting-receiving selection and modulator control signal are as the electrical tilt antenna control signal, described transmitting-receiving selection and modulating unit are corresponding to the varying level state modulation output on-off keying sequence of described transmitting-receiving selection and modulator control signal, electrical tilt antenna control signal as after the modulation is sent to described first and closes the road control unit;
Described first closes the road control unit, is used for that the electrical tilt antenna control signal after described dc power signal, described antenna to calibrate radio frequency signal and the modulation is merged into first and is sent to described electrical tilt antenna remote control unit after closing the road radiofrequency signal.
4. system as claimed in claim 3 is characterized in that,
Described electrical tilt antenna remote control unit comprises second and closes the road control unit; Described electrical tilt antenna modulating and demodulating signal module also comprises the electric transfer receipts that link to each other with described transmitting-receiving selection and modulating unit and demodulating unit, the calibrating signal filter unit that links to each other with described electric transfer receipts and demodulating unit;
Described second closes the road control unit, is used for the electrical tilt antenna status signal after antenna to calibrate radio frequency signal and the modulation and merges into second and close the road radiofrequency signal and close the road control unit after be sent to described first by described radio frequency cable;
Described first closes the road control unit, also be used for closing road control unit reception second from described second and close the road radiofrequency signal, and the electrical tilt antenna status signal that therefrom parses after the modulation is sent to described transmitting-receiving selection and modulating unit; Therefrom parse the antenna to calibrate radio frequency signal and be sent to the calibrating signal filter unit;
Described transmitting-receiving selection and modulating unit, be used for keeping high level or low level time greater than described time of default during thresholding at described transmitting-receiving selection and modulator control signal, level was kept the reception indication of state representation electrical tilt antenna transmitting-receiving control signal when this of described transmitting-receiving selection and modulator control signal was long, described transmitting-receiving selection and modulating unit be from the described first electrical tilt antenna status signal that closes after the road control unit receives modulation, and be sent to described electric transfer receipts and demodulating unit;
Described electric transfer receipts and demodulating unit are used for the electrical tilt antenna status signal after the modulation is carried out demodulation, and the electrical tilt antenna status signal that obtains is sent to described base station side Remote Radio Unit;
Described calibrating signal filter unit carries out being sent to the base station side Remote Radio Unit after the filtering after closing road control unit reception antenna calibrate radio frequency signal from described first.
5. system as claimed in claim 1 or 2 is characterized in that,
Described base station side control unit comprises base station side Remote Radio Unit and electrical tilt antenna modulating and demodulating signal module; Described electrical tilt antenna modulating and demodulating signal module comprise successively the electricity that links to each other readjust the distribution penetrate modulation subunit, transmitting-receiving chooser unit and first closes the road control unit;
Described base station side Remote Radio Unit is used for readjusting the distribution to described electricity and penetrates modulation subunit and send the electrical tilt antenna control signal, sends electrical tilt antenna transmitting-receiving control signal to described transmitting-receiving chooser unit; Also be used for closing the road control unit and send described dc power signal and described antenna to calibrate radio frequency signal to described first;
Described electricity is readjusted the distribution and is penetrated modulation subunit, be used to receive the electrical tilt antenna control signal and it is carried out the on-off keying modulation, and the electrical tilt antenna control signal after will modulating is sent to described transmitting-receiving chooser unit;
Described transmitting-receiving chooser unit is used for when described electrical tilt antenna transmitting-receiving control signal is designated as transmit status, will readjust the distribution from described electricity and penetrate modulation subunit and receive electrical tilt antenna control signal after the modulation and be sent to described first and close the road control unit;
Described first closes the road control unit, is used for that the electrical tilt antenna control signal after described dc power signal, described antenna to calibrate radio frequency signal and the modulation is merged into first and is sent to described electrical tilt antenna remote control unit after closing the road radiofrequency signal.
6. system as claimed in claim 5 is characterized in that,
Described electrical tilt antenna remote control unit comprises second and closes the road control unit; Described electrical tilt antenna modulating and demodulating signal module comprises that also electric transfer receipts and demodulating unit link to each other with described transmitting-receiving chooser unit;
Described second closes the road control unit, is used for that the electrical tilt antenna status signal after the modulation and antenna to calibrate radio frequency signal are merged into second and closes the road signal and close the road control unit after be sent to described first by described radio frequency cable;
Described first closes the road control unit, also is used for being sent to described transmitting-receiving chooser unit from the described second electrical tilt antenna status signal that closes after road control unit reception second is closed the road signal and therefrom parsed modulation;
Described transmitting-receiving chooser unit also is used for when described electrical tilt antenna transmitting-receiving control signal is designated as accepting state, will be sent to described electric transfer receipts and demodulating unit from the described first electrical tilt antenna status signal that closes after the modulation that the road control unit receives;
Described electric transfer receipts and demodulating unit are used for the electrical tilt antenna status signal after the modulation is carried out demodulation, and the electrical tilt antenna status signal that obtains is sent to described base station side Remote Radio Unit.
7. system as claimed in claim 3 is characterized in that,
Described first closes the road control unit comprises first isolation module, second isolation module, radiofrequency signal isolation module;
Described first isolation module is used to transmit electrical tilt antenna control signal after the modulation and the electrical tilt antenna status signal after the modulation; Described second isolation module is used to transmit the calibrate radio frequency signal; Described first isolation module and described second isolation module be all by electric capacity isolated DC power supply signal, and different according to the frequency of the electrical tilt antenna control signal after calibrate radio frequency signal and the modulation, adopts the filter circuit of different frequency to isolate mutually;
Described radiofrequency signal isolation module is used to transmit dc power signal, the electrical tilt antenna control signal after isolating the calibrate radio frequency signal and modulate by magnetic bead and/or inductance.
8. an electrical tilt antenna communication means is characterized in that,
The electrical tilt antenna control signal of base station side control unit after with dc power signal, antenna to calibrate radio frequency signal and modulation merged into first and is sent to the electrical tilt antenna remote control unit by radio frequency cable after closing the road signal.
9. method as claimed in claim 8 is characterized in that,
The electrical tilt antenna status signal of electrical tilt antenna remote control unit after with antenna to calibrate radio frequency signal and modulation merged into second and is sent to described base station side control unit by described radio frequency cable after closing the road radiofrequency signal.
10. method as claimed in claim 9 is characterized in that,
The base station side Remote Radio Unit of described base station side control unit sends electrical tilt antenna control signal and electrical tilt antenna transmitting-receiving control signal to electrical tilt antenna modulating and demodulating signal module;
The described electrical tilt antenna control signal that described electrical tilt antenna modulating and demodulating signal module will receive and described electrical tilt antenna transmitting-receiving control signal is merged into a transmitting-receiving selection and modulator control signal and is selected and modulator control signal advances half-duplex operation control according to this transmitting-receiving; Specifically comprise:
The high-low level of described transmitting-receiving selection and modulator control signal switches in the process when high level is held time and low level is held time all in the time of default thresholding, the high-low level switching state of described transmitting-receiving selection and modulator control signal is represented the transmission indication of electrical tilt antenna transmitting-receiving control signal, described transmitting-receiving selection and modulator control signal are as the electrical tilt antenna control signal, described transmitting-receiving selection and modulating unit are corresponding to the varying level state modulation output on-off keying sequence of described transmitting-receiving selection and modulator control signal, as the electrical tilt antenna control signal after the modulation; Described transmitting-receiving selection and modulator control signal are kept high level or low level time greater than described time of default during thresholding, level was kept the reception indication of state representation electrical tilt antenna transmitting-receiving control signal when this of described transmitting-receiving selection and modulator control signal was long, and described transmitting-receiving selection and modulating unit receive the electrical tilt antenna status signal after the modulation.
11. method as claimed in claim 9 is characterized in that,
The base station side Remote Radio Unit of described base station side control unit sends electrical tilt antenna control signal and electrical tilt antenna transmitting-receiving control signal to electrical tilt antenna modulating and demodulating signal module;
When described electrical tilt antenna modulating and demodulating signal module was designated as transmit status in described electrical tilt antenna transmitting-receiving control signal, the electrical tilt antenna control signal after described electrical tilt antenna control signal modulated and will modulate was merged into first together with dc power signal, antenna to calibrate radio frequency signal and is sent to described electrical tilt antenna remote control unit after closing the road radiofrequency signal; When described electrical tilt antenna transmitting-receiving control signal is designated as accepting state, receive second and close the road radiofrequency signal and therefrom parse modulation back electrical tilt antenna status signal, carry out after the demodulation electrical tilt antenna status signal being sent to the base station side Remote Radio Unit from the electrical tilt antenna remote control unit.
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