CN103580733A - Antenna control method and system - Google Patents
Antenna control method and system Download PDFInfo
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- CN103580733A CN103580733A CN201210270287.0A CN201210270287A CN103580733A CN 103580733 A CN103580733 A CN 103580733A CN 201210270287 A CN201210270287 A CN 201210270287A CN 103580733 A CN103580733 A CN 103580733A
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Abstract
The invention discloses an antenna control method and system. A plurality of sets of attenuation parameters and delay parameters are defined. A plurality of channel responses, corresponding to a plurality of remote antenna elements, of a client terminal device and a base station are obtained. According to the channel responses, a plurality of channel characteristic values corresponding to the attenuation parameters and the delay parameters are calculated, and the channel characteristic values reflect the data transmission amount between the base station and the client terminal device. According to one default channel characteristic value, the corresponding set of the attenuation parameter and the delay parameter are selected and output.
Description
Technical field
Invention relates to a kind of method of controlling antenna and system.
Background technology
Along with day by day surging environmental consciousness and the consideration of energy saving economy, mass transportation systems become top-priority important construction.On the Communications service framework of mass transportation systems, adopt at present conventionally in conjunction with the internal network of car and car the two-part service architecture of outer network so that numerous passengers to be provided complete mobile telecommunication service in the single compartment of advancing.
Optical fiber microwave (Radio over Fiber, RoF) technology has been widely used in the poor places of signal receiving quality such as tunnel or building.In recent years, optical fiber microwave technology is more in conjunction with track communication system, first converts microwave signal to light signal and delivers to destination, a distant place and go back to the signal of telecommunication again, therefore can transmit high-frequency signal to compared with decaying fast at a distance and not.In mobile communication, be limited to base station covering scope and the situation that can change hand (Hand Over, Hand Off).Change too frequently hand situation and may cause data transmission efficiency to decline to a great extent, the situation of service even cannot be provided, this phenomenon affects more obvious in high-speed mobile communication.
Because mass transportation systems have the characteristic that predictability moves, further, in track communication system, fixed base platform is suggested to form distributing antenna system (Distributed Antenna System in conjunction with the concept of optical fiber microwave technology, DAS), extensible base station covering scope.Meanwhile, and can reach mobile base station (moving cell) by RF control method and occur to avoid changing the situation of hand.Yet the signal that optical fiber microwave technology transmits in communication system, for frequently, may cause multi-path (multipath) effect.For mobile communcations system, the multi-path effect of time domain can cause the passage on frequency domain to change, and when multi-path possesses again close Energy distribution, impact is more acute.
For instance, when train moves between two remote antenna units (Remote Antenna Unit, RAU), the multi-path situation that possesses close energy easily occurs, and then causes the quality of reception to decline, and is even forced to communication interruption.Employing base station was proposed in conjunction with selecting service antenna to reach single direct-view ripple (Line of Sight, LoS) signal to reduce multi-path effect.In being applied to frequency division multi-task (frequencydomain multiplexing) system, the remote antenna unit that base you control device can select to approach most travelling carriage is as service antenna unit and close other remote antenna units and send and receive signal, reduces multi-path effect.
When cloth is built distributing antenna system, have and proposed base station to the circuit of each remote antenna unit with wiring or added that the mode of electronic delay means compensates into the identical propagation delay time.Yet the above-mentioned practice needs extra optical fiber or electronic delay means.In distributing antenna system, the propagation delay time comprises the signal transmission between optical fiber and air, and signal transmission speed in optical fiber is slow between air; And the fiber lengths using is longer, in permissible pure air, transmit covering scope just less.If want, signal is extended and more needs higher density cloth to build mode; Otherwise, if generally speaking want, promoting single antenna covering scope and can not use longer optical fiber, whole covering scope cannot promote.
Summary of the invention
The object of the invention is to, a kind of method of controlling antenna and system are provided, can effectively solve the multi-path effect problem of antenna system.In addition, the asymmetric antenna system that the present invention proposes, can reduce antenna system and carry out the computational complexity of passage while adjusting, and the cloth of saving antenna system builds up this.
According to the present invention, one implements example, proposes a kind of method of controlling antenna, comprises the following steps.Definition many groups attenuation parameter and delay parameter.Obtain a plurality of channel responses corresponding to a plurality of remote antenna units of a client terminal device and a base station.A plurality of channel characteristics values of calculating corresponding those group attenuation parameters and delay parameter according to those channel responses, those channel characteristics values are reacted the volume of transmitted data between this base station and this client terminal device.According to a default data transmission quantity, select and export corresponding this group attenuation parameter and delay parameter.
According to the present invention, one implements example, proposes a kind of antenna control system, comprises that a measurement module, a control module and postpone and attenuation module.Measurement module obtains a plurality of channel responses corresponding to a plurality of remote antenna units of a client terminal device and a base station.Control module is calculated a plurality of channel characteristics values of corresponding many group attenuation parameters and delay parameter according to those channel responses, those channel characteristics values are reacted the volume of transmitted data between this base station and this client terminal device.Characteristic of correspondence value this group attenuation parameter and delay parameter are selected and exported to control module, according to a default channel characteristic value.Postpone to realize with attenuation module this group attenuation parameter and delay parameter of being exported by this control module.
According to the present invention, one implements example, proposes a kind of antenna control system, comprises that a plurality of remote antenna blocks, a measurement module, a control module and postpone and attenuation module.Each remote antenna block comprises one first remote antenna unit and one second remote antenna unit, and the distance between the first remote antenna unit and a base station is greater than the distance between the second remote antenna unit and this base station.Measurement module obtains a client terminal device corresponding to a plurality of channel responses of those remote antenna units.Control module is calculated a plurality of channel characteristics values of corresponding a plurality of attenuation parameter groups according to those channel responses, those channel characteristics values are reacted the volume of transmitted data between this base station and this client terminal device.Corresponding attenuation parameter group is selected and exported to control module, according to a default channel characteristic value.The attenuation parameter group that wherein attenuation module realization is exported by this control module is to the first remote antenna unit of the plurality of remote antenna block.
Below in conjunction with the drawings and specific embodiments, describe the present invention, but not as a limitation of the invention.
Accompanying drawing explanation
Figure 1A illustrates a communication system, comprising implementing example schematic according to one of ACU antenna control unit of the present invention;
Figure 1B illustrates another communication system, comprising another enforcement example schematic according to ACU antenna control unit of the present invention;
Fig. 1 C illustrates another communication system, comprising another enforcement example schematic according to ACU antenna control unit of the present invention;
Fig. 2 illustrates according to method of controlling antenna one of the present invention and implements exemplary flowchart;
Fig. 3 illustrates the detail flowchart of implementing example according to method of controlling antenna one of the present invention;
Fig. 4 illustrates according to the simple cloth of an enforcement example of antenna control system of the present invention and builds schematic diagram;
Fig. 5 illustrates the detail flowchart according to another enforcement example of method of controlling antenna of the present invention;
Fig. 6 illustrates according to the simple cloth of another enforcement example of antenna control system of the present invention and builds schematic diagram.
Element wherein, Reference numeral
100,100 ', 100 ", 400,600: communication system
120: base station
140,140 ', 140 ": head-end unit
142: measurement module
144: control module
145,161: electrical to optical converter (E/O)
146: antenna control system
147,162: optical-electrical converter (O/E)
148,168: postpone and attenuation module
149: multiplexer
152,165: uplink and downlink signals controller
154: synthesizer
156: splitter
160,160 ': remote antenna unit
163: low noise amplifier
164: power amplifier
166: antenna
167: controller
169: separate multiplexer
170: client terminal device
610,610_1,610_2: remote antenna block
648: attenuation module
Embodiment
The enforcement example of method of controlling antenna proposed by the invention and device, can utilize the transmitting power of remote antenna unit and multi-path effect (multipath effect) problem that solves antenna system time of delay controlled.In addition, the present invention further proposes asymmetric antenna control system, the computational complexity while carrying out passage adjustment to reduce antenna system.
Please refer to Figure 1A, one communication system 100 comprises a base station (Base Station, BS) 120, one client terminal device (subscriber) 170, a head-end unit (Head End Unit, HEU) 140 and a plurality of remote antenna unit (Remote Antenna Unit, RAU) 160.
Wherein the communication between head-end unit 140 and remote antenna unit 160 adopts optical fiber microwave (Radio over Fiber, RoF) technology.Wherein, head-end unit 140, in order to by the down link of base station 120 (Downlink) signal, is distributed and those remote antenna units 160 that lead; Client terminal device 170 up links (Uplink) signal of simultaneously remote antenna unit 160 being collected, synthetic and guiding base station 120.
Head-end unit 140 comprises a uplink and downlink signals controller 152, a splitter 156, a synthesizer 152, many electricals to optical converter (E/O) 145, many optical-electrical converters (O/E) 147.Remote antenna unit 160 comprises optical-electrical converter 162, one electrical to optical converter 161, one power amplifiers 164, a low noise amplifier 163, a uplink and downlink signals switch 165 and an antenna 166.
The down link signal that uplink and downlink signals controller 152 sends base station 120 is directed to splitter 156, then according to actual antennas cloth, build demand, corresponding those remote antenna unit 160 quantity of downstream signal are divided into many group signals with splitter 156, through electrical to optical converter (E/O) 145, convert light territory signal to and deliver to should remote antenna unit 160 via optical fiber.Head-end unit 140 is passed on the light territory signal of base station down link signal, and optical-electrical converter 162 converts electric territory signal to, after power amplifier 164 amplifying powers, is directed to antenna 166 sends through uplink and downlink signals controller 165.
Wherein, uplink and downlink signals controller 152 can circulator (Circulator) or the switch (Switch) that is controlled by base station implement; And uplink and downlink signals controller 165 can circulator (Circulator) or the switch (Switch) that is controlled by downlink signal power detector implement.
Figure 1A comprises that antenna control system 146 at least comprises a measurement module 142, a plurality of delay and attenuation module 148 and a control module 144 according to antenna control system 146 1 enforcement example schematic of the present invention.In Figure 1A, postponing with attenuation module 148 is to be implemented in head-end unit 140 for example describes, and is so not limited to this.Measurement module 142 obtains client terminal device 170 and a plurality of channel responses of base station 120 corresponding to a plurality of remote antenna units 160.Measurement module 142 can obtain those channel responses by a plurality of uplink signals based on by uplink and downlink signals controller 152 reference one sequential reference signals (timing epoch) and those remote antenna units 160, and each channel response comprises a signal strength values a and a delay time T.This timing reference signal can be the frame initial time of a gps signal or down link.A plurality of delays a plurality of remote antenna units 160 corresponding to attenuation module 148, realize corresponding one group of attenuation parameter and the delay parameter postponing with the remote antenna unit 160 of attenuation module 148 of control module 144 output.
In addition, postpone also can be placed in remote antenna unit with attenuation module 148, please refer to Figure 1B, it illustrates a communication system 100 ', comprising another enforcement example schematic according to antenna control system 146 of the present invention.A plurality of delays of remote antenna unit 160 ' realize with attenuation module 168 attenuation parameter and the delay parameter that control module 144 is exported the remote antenna unit 160 ' of corresponding delay and attenuation module 168.One group of attenuation parameter of the corresponding remote antenna unit 160 ' of control module 144 output and delay parameter, be converted to an appropriate format control signal if centre frequency is in compared with the amplitude-modulated signal of low frequency, by multiplexer 149 and down link signal, integrate, by electrical to optical converter 145 (E/O), be transferred to the optical-electrical converter 162 (O/E) of remote antenna unit 160 ', through the separated appropriate format control signal of a solution multiplexer 169 and down link signal.This appropriate format control signal is replied as this group attenuation parameter and delay parameter, control lag and attenuation module 168 through a controller 167.
Please refer to Fig. 1 C, it illustrates a communication system 100 ", comprising implementing example schematic according to antenna control system 146 ' of the present invention.Antenna control system 146 ' comprising: measurement module 142, one control modules 144, a plurality of attenuation module 648, and a plurality of remote antenna block 610.1C figure is a kind of framework of asymmetric distribution formula antenna system.
A plurality of remote antenna blocks 610, each remote antenna block 610 comprises one first remote antenna unit 160 and one second remote antenna unit 160, and the distance that this first remote antenna unit 160 and this base station are 120 is greater than the distance of 120 of this second remote antenna unit 160 and this base stations.Measurement module 142 is in order to obtain a client terminal device corresponding to a plurality of channel responses of those remote antenna units.Control module 144, in order to calculate a plurality of channel characteristics values of corresponding a plurality of attenuation parameters according to those channel responses, those channel characteristics values are reacted the volume of transmitted data between this base station and this client terminal device, and select and export the attenuation parameter of a corresponding default channel characteristic value.A plurality of attenuation module 648, in order to realize this first remote antenna unit 160 in corresponding those remote antenna blocks 610 of those attenuation parameters of control module 144 output.Please refer to Fig. 2, it illustrates the method for controlling antenna flow chart of implementing example according to the present invention one.In step S200, definition many groups attenuation parameter A and delay parameter delta.Each group attenuation parameter A is comprised of a plurality of decay element α and distinguishes corresponding those remote antenna units 160, and a plurality of decay element α numerical value can be defined and be obtained by the available equipment energy characteristic of system element; In like manner, each group delay parameter delta is comprised of a plurality of decay element δ and distinguishes corresponding those remote antenna Unit 160, and a plurality of decay element δ numerical value herein can be defined and be obtained by the available equipment energy characteristic of system element.
In step S210, measuring unit 142 obtains a plurality of channel responses corresponding to a plurality of remote antenna units 160 of a client terminal device and a base station 120, and each channel response comprises a signal strength values a and a delay time T.In step S220, control unit 144 calculates a plurality of channel characteristics values of corresponding those group attenuation parameters and delay parameter according to those channel responses, the volume of transmitted data (channel transfer quality state) between these channel characteristics value reactive group platforms 120 and client 170 devices.In step S230, corresponding this group attenuation parameter and delay parameter are selected and exported to control unit 144, according to a default channel characteristic value.
Next client terminal device is hereby discussed and is positioned at a covering scope C mono-ad-hoc location p of base station 120 and the situation that base station corresponds to M remote antenna unit 160.Please refer to Fig. 3, it illustrates the detail flowchart according to the method for controlling antenna of an enforcement example.In step S300, definition many groups attenuation parameter A and delay parameter delta.Each group attenuation parameter A is by a plurality of decay element α
kform and correspond respectively to k remote antenna 160, a plurality of decay element α
knumerical value can be defined and be obtained by the available equipment energy characteristic of system element; In like manner, each group delay parameter delta is by a plurality of decay element δ
kform and correspond respectively to k remote antenna unit 160, the plurality of decay element δ
knumerical value can be defined and be obtained by the available equipment energy characteristic of system element, the positive integer that k is 1 ~ M.In step S310, when measurement module 142 obtains client terminal device 170 and is positioned at this ad-hoc location p, corresponding to the channel response of k remote antenna unit 160, this channel response comprises a signal strength values ap, k and a delay time T p, k, the positive integer that k is 1 ~ M.
In step S322, each group attenuation parameter and delay parameter of substitution one by one.In step S324, control module 144 is calculated when client terminal device 170 is positioned at ad-hoc location p according to those channel responses (ap, k and τ p, k), the channel characteristics value σ p of corresponding step S322 this group attenuation parameter A of substitution of institute and delay parameter delta, as shown in formula (1).Channel characteristics value σ p can react when client terminal device 170 is positioned at ad-hoc location p, the volume of transmitted data (channel transfer quality state) between base station 120 and client 170 devices.
In step S326, judge whether channel characteristics value σ p surpasses an acquiescence threshold value (default channel characteristic value), and acquiescence threshold value by testing decision, for example, is 2.5 μ s.
When channel characteristics σ p does not surpass acquiescence threshold value,, in step S330, this group attenuation parameter corresponding to channel characteristics value that does not surpass acquiescence threshold value selected and exported to control module 144
with delay parameter
when postponing with attenuation module 148 to realize this group attenuation parameter and delay parameter, improving client terminal device 170 to be positioned at ad-hoc location p and the channel transfer quality of 120 of base stations.When channel characteristics σ p surpasses acquiescence threshold value, in step S327, control module 144 is found out better channel characteristics value corresponding this group attenuation parameter Ap and delay parameter delta p, and in step S328, judges whether each group attenuation parameter and all substitutions of delay parameter.If not, get back to step S322 and carry out iterative operation.If so, subsequent steps S330, this group attenuation parameter corresponding to a better channel characteristics value selected and exported to control module 144
with delay parameter
channel transfer quality when postponing and attenuation module 148, improving client terminal device 170 to be positioned at ad-hoc location p.In an enforcement example, this better channel characteristics value is a smallest passage characteristic value, and step S322 ~ S330 can represent by formula (2), and wherein T σ is preset threshold value.
Please refer to Fig. 4, it illustrates and comprises that the simple cloth of signal transmission path of implementing a communication system 400 of example according to antenna control system of the present invention builds schematic diagram.By Fig. 4, explain that the antenna control system in Figure 1A, Figure 1B applies above-mentioned method of controlling antenna, based on client terminal device 170, be positioned at the viewpoint of an ad-hoc location p, find out this group attenuation parameter and delay parameter of the channel characteristics value of a plurality of remote antenna units 160 of goodization, then control transmitting power and the time of delay of remote antenna unit 160, channel transfer quality when improving client terminal device 170 and being positioned at covering scope C, therefore can solve the message transmission rate decline problem causing because of multi-path effect in distributing antenna system.In Fig. 4, each postpones for example by delay element DLY and attenuating elements ATT, to be composed in series with attenuation module 148.
Next client terminal device 170 is hereby discussed and is positioned at the arbitrary position of covering scope of base station 120 and the situation that base station corresponds to M those remote antenna units 160.Please refer to Fig. 5, it illustrates the detail flowchart according to an example of the method for controlling antenna of another enforcement example of the present invention.In step S500, definition many groups attenuation parameter A and delay parameter delta, each group attenuation parameter A is by a plurality of decay element α
kform and correspond respectively to k remote antenna 160, the plurality of decay element α
knumerical value is defined and is obtained by the available equipment energy characteristic of system element; In like manner, each group delay parameter delta is by a plurality of decay element δ
kform and correspond respectively to k remote antenna 160, the plurality of decay element δ
knumerical value is defined and is obtained by the available equipment energy characteristic of system element, the positive integer that k is 1 ~ M.In step S510, when measurement module 142 obtains client terminal device 170 and is positioned at arbitrary position p, corresponding to the channel response of k remote antenna unit 160, channel response comprises a signal strength values ap, k and a delay time T p, k, the positive integer that k is 1 ~ M.
In step S522, each group attenuation parameter and delay parameter of substitution one by one.In step S524, control module 144 is according to those channel responses (ap, k and τ p, k) calculate when client terminal device 170 is positioned at the arbitrary position p of covering scope C, the channel characteristics value σ p of corresponding step S522 this group attenuation parameter A of substitution of institute and delay parameter delta, as shown in formula (1).Channel characteristics value σ p can react when client terminal device 170 is positioned at the arbitrary position p of covering scope C, the volume of transmitted data (channel transfer quality state) between base station 120 and client terminal device 170 devices.
In step S526, computing client end device 170 is evenly distributed in the arbitrary position p of covering scope C, and those channel characteristics values σ p is greater than the probability P of an acquiescence threshold value (default channel characteristic value), as shown in formula (3), wherein, T
σthe preset threshold value that the experiment of serving as reasons determines is for example 2.5 μ s.
In step S527, control module 144 is found out this group attenuation parameter that minimum probability is corresponding
with delay parameter
and in step S528, judge whether each group attenuation parameter and all substitutions of delay parameter.If not, get back to step S522 and carry out iterative operation.If so, subsequent steps S530, this group attenuation parameter that minimum probability is corresponding is selected and exported to control module 144
with delay parameter
to postponing and attenuation module 148, while being positioned at covering scope C to improve client terminal device 170 and the channel transfer quality of 120 of base stations.Step S522 ~ S530 Essential Action can represent by formula (4).
Above-mentioned method of controlling antenna, based on client terminal device 170, be positioned at the viewpoint of covering scope C, when finding out goodization client terminal device 170 and being positioned at covering scope C and 120 channel characteristics values of base station be greater than this group attenuation parameter and delay parameter of the probability of acquiescence threshold value, then control transmitting power and the time of delay of adjusting remote antenna unit 160, when improving client terminal device 170 and being positioned at covering scope C and the transmission quality of 120 of base stations, therefore can solve the message transmission rate decline problem causing because of multi-path effect in distributing antenna system.If environment is difficult for change, in the antenna system 100 of Figure 1B, can directly set delay and attenuation module 168 according to attenuation parameter and delay parameter, and omit multiplexer 149, separate multiplexer 169 and controller 167.
In addition, as shown in Figure 6, it illustrates another the simple cloth of signal transmission path of implementing a communication system 600 of example comprising according to antenna system of the present invention and builds schematic diagram.By the antenna control system in Fig. 6 key-drawing 1C, apply above-mentioned method of controlling antenna.Communication system 600 comprises a base station 120, a plurality of remote antenna block 610_1 and 610_2, a measurement module (not being illustrated in figure), a control module (not being illustrated in figure) and attenuation module 648 (being comprised of a plurality of attenuating elements).Each remote antenna block 610 comprises a remote antenna unit and another remote antenna unit, and the distance that a remote antenna unit and base station are 120 is greater than the distance of 120 of another remote antenna unit and base stations.
The effect of measurement module and control module is with described in above-mentioned method of controlling antenna, according to a default channel characteristic value, and the attenuation parameter of the better channel characteristics value of final decision correspondence.Attenuation module realizes the attenuation parameter of corresponding smaller channels characteristic value to those the first remote antenna units, for example, be remote antenna unit 2 and 3.The remote antenna block 610_1 of take explains as example, and the distance that remote antenna unit 2 and base station are 120 is greater than the distance of 120 of remote antenna unit 3 and base stations, is also that the signal propagation delay time of remote antenna unit 2 between optical fiber is longer.Therefore, with the attenuation module 648 being formed by attenuating elements ATT2, apply attenuation parameter to reduce the transmitting power of remote antenna unit 2, and maintain the transmitting power of remote antenna unit 3.So in the situation that not needing to adjust delay parameter, the multi-path effect of distributed antenna system 600 is slowed down.And observe Fig. 6, can learn, in single remote antenna block middle distance base station 120 its transmitting power of remote antenna unit far away, can be attenuated.
The method of controlling antenna that the above-mentioned enforcement example of the present invention is invented and the enforcement example of device, according to a default channel characteristic value, when finding out goodization client terminal device 170 and being positioned at covering scope C and 120 channel characteristics values of base station, and control according to this transmitting power and the time of delay of remote antenna unit, can effectively solve the multi-path effect problem of antenna system.In addition, the present invention also further proposes asymmetric antenna system, reduce antenna system and carry out the computational complexity of passage while adjusting, and the cloth of saving antenna system builds up this.
Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (19)
1. a method of controlling antenna, is characterized in that, comprising:
Definition many groups attenuation parameter and delay parameter;
Obtain a plurality of channel responses corresponding to a plurality of remote antenna units of a client terminal device and a base station;
A plurality of channel characteristics values of calculating corresponding those group attenuation parameters and delay parameter according to those channel responses, those channel characteristics values are reacted the volume of transmitted data between this base station and this client terminal device; And
According to a default channel characteristic value, select and export corresponding this group attenuation parameter and delay parameter.
2. method of controlling antenna according to claim 1, it is characterized in that, a plurality of uplink signals of those channel responses based on a sequential reference signal and those remote antenna units and obtaining, each channel response comprises a signal strength values and a time of delay.
3. method of controlling antenna according to claim 1, it is characterized in that, this client terminal device is positioned at covering scope one ad-hoc location of this base station, and this step of obtaining those channel responses comprises: obtain when this client terminal device is positioned at this ad-hoc location those channel responses corresponding to those remote antenna units.
4. method of controlling antenna according to claim 3, is characterized in that, the step of those channel characteristics values of described calculating comprises:
According to those channel responses, calculate when this client terminal device is positioned at this ad-hoc location, corresponding to those channel characteristics values of those group attenuation parameters and delay parameter.
5. method of controlling antenna according to claim 4, is characterized in that, this default channel characteristic value is an acquiescence threshold value, and the step of this selection output comprises:
Judge that whether those channel characteristics values are all over this preset threshold value; And
When one of those channel characteristics values do not surpass this preset threshold value, select and export this corresponding group attenuation parameter and the delay parameter of this channel characteristics value that does not surpass this acquiescence threshold value.
6. method of controlling antenna according to claim 5, is characterized in that, the step of described selection output also comprises:
When those channel characteristics values are all over this acquiescence threshold value, select and export this corresponding group attenuation parameter and delay parameter of channel characteristics value that should tentation data transmission quantity.
7. method of controlling antenna according to claim 1, it is characterized in that, this client terminal device is positioned at an arbitrary position of covering scope of this base station, and described in obtain those channel responses step comprise: obtain when this client terminal device is positioned at this arbitrary position of covering scope those channel responses corresponding to those remote antenna units.
8. method of controlling antenna according to claim 7, is characterized in that, the step of those channel characteristics values of described calculating comprises:
According to those channel responses, calculate when this client terminal device is positioned at this arbitrary position of covering scope those channel characteristics values of corresponding those group attenuation parameters and delay parameter.
9. method of controlling antenna according to claim 8, is characterized in that, this default channel characteristic value is an acquiescence threshold value, and the step of this selection output comprises:
Calculate the probability that each group attenuation parameter and corresponding those channel characteristics values of delay parameter are greater than an acquiescence threshold value; And
Select and export this corresponding group attenuation parameter and delay parameter of minimum value of those probabilities.
10. an antenna control system, is characterized in that, comprising:
One measurement module, in order to obtain a plurality of channel responses corresponding to a plurality of remote antenna units of a client terminal device and a base station;
One control module, in order to calculate a plurality of channel characteristics values of corresponding many group attenuation parameters and delay parameter according to those channel responses, those channel characteristics values are reacted the volume of transmitted data between this base station and this client terminal device, and according to a default channel characteristic value, select and export corresponding this group attenuation parameter and delay parameter; And
A plurality of delays and attenuation module, in order to realize this group attenuation parameter and delay parameter of being exported by this control module.
11. antenna control systems according to claim 10, it is characterized in that, a plurality of uplink signals of this measurement module based on a sequential reference signal and those remote antenna units obtain those channel responses, and each channel response comprises a signal strength values and a time of delay.
12. antenna control systems according to claim 10, it is characterized in that, this client terminal device is positioned at covering scope one ad-hoc location of this base station, and this measurement module obtains when this client terminal device is positioned at this ad-hoc location those channel responses corresponding to those remote antenna units.
13. antenna control systems according to claim 12, is characterized in that, this control module is calculated when this client terminal device is positioned at this ad-hoc location according to those channel responses, corresponding to those channel characteristics values of those group attenuation parameters and delay parameter.
14. antenna control systems according to claim 13, it is characterized in that, this default channel characteristic value is an acquiescence threshold value, this control module judges that whether those channel characteristics values are all over this preset threshold value, when one of those channel characteristics values do not surpass this preset threshold value, this corresponding group attenuation parameter and the delay parameter of this channel characteristics value that does not surpass this acquiescence threshold value selected and exported to this control module.
15. antenna control systems according to claim 14, it is characterized in that, when those channel characteristics values are all over this acquiescence threshold value, this control module is selected and is exported this corresponding group attenuation parameter and delay parameter of channel characteristics value that should tentation data transmission quantity.
16. antenna control systems according to claim 10, it is characterized in that, this client terminal device is positioned at an arbitrary position of covering scope of this base station, and this measurement module obtains when this client terminal device is positioned at this arbitrary position of covering scope those channel responses corresponding to those remote antenna units.
17. antenna control systems according to claim 16, it is characterized in that, this control module is calculated when this client terminal device is positioned at this arbitrary position of covering scope according to those channel responses, corresponding to those channel characteristics values of those group attenuation parameters and delay parameter.
18. antenna control systems according to claim 17, it is characterized in that, this default channel characteristic value is an acquiescence threshold value, this control module is calculated the probability that each group attenuation parameter and corresponding those channel characteristics values of delay parameter are greater than this acquiescence threshold value, and this corresponding group attenuation parameter and delay parameter of minimum value of those probabilities selected and exported to this control module.
19. 1 kinds of antenna control systems, is characterized in that, comprising:
A plurality of remote antenna blocks, each remote antenna block comprises one first remote antenna unit and one second remote antenna unit, the distance between this first remote antenna unit and a base station is greater than the distance between this second remote antenna unit and this base station;
One measurement module, in order to obtain a client terminal device corresponding to a plurality of channel responses of those remote antenna units; And
One control module, in order to calculate a plurality of channel characteristics values of corresponding a plurality of attenuation parameter groups according to those channel responses, those channel characteristics values are reacted the volume of transmitted data between this base station and this client terminal device, and according to a default channel characteristic value, select and export corresponding attenuation parameter group;
The plurality of attenuation module wherein, in order to realize the attenuation parameter group exported by this control module to the first remote antenna unit of the plurality of remote antenna block.
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