CN103580734B - antenna control method and system - Google Patents
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Abstract
The invention discloses an antenna control method and system. Multiple sets of attenuation parameters and delay parameters are defined. A plurality of channel responses corresponding to a plurality of remote antenna units of a client device and a base station are obtained. A plurality of channel characteristic values corresponding to the attenuation parameters and the delay parameters are calculated according to the channel responses, and the channel characteristic values reflect the data transmission quantity between the base station and the client device. And selecting and outputting the corresponding attenuation parameter and delay parameter set according to a default channel characteristic value.
Description
Technical field
Invention is related to a kind of method of controlling antenna and system.
Background technology
With the consideration of day by day surging environmental consciousness and energy saving economy, mass transportation systems become top-priority heavy
Build.On the Communications service framework of mass transportation systems, generally adopt combine the internal network of car with car to outer network at present
Two-part service architecture providing numerous passengers complete mobile telecommunication service in single traveling compartment.
Optical fiber microwave (Radio over Fiber, RoF) technology has been widely used in the signals such as tunnel or building and has connect
Receive second-rate place.In recent years, optical fiber microwave technology more combines railroad communications systems, and microwave signal is first converted into into light letter
Number deliver to distant place destination and go back to electric signal, therefore transmittable high-frequency signal again to more at a distance without rapid decay.Moving
In communication, it is limited to base station covering scope and the situation of hand-off (Hand Over, Hand Off) can occurs.Excessively frequently
Hand-off situation may result in data transmission efficiency and decline to a great extent, or even cannot provide the situation of service, and this phenomenon is at a high speed
Affect to become apparent from mobile communication.
It is further, fixed in railroad communications systems because mass transportation systems have the characteristic of predictability movement
Base station is suggested to form distributing antenna system (Distributed Antenna with reference to the concept of optical fiber microwave technology
System, DAS), may extend away base station covering scope.Meanwhile, and mobile base station can be reached by RF control method
(moving cell) occurs to avoid hand-off situation.However, the signal that optical fiber microwave technology is transmitted in communication system is
With frequency, multi-path (multipath) effect is may result in.For mobile communcations system, the multi-path effect of time domain
The passage on frequency domain can be caused to change, affect more acute when multi-path is but also with close Energy distribution.
For example, when train is moved between two remote antenna units (Remote Antenna Unit, RAU), tool
The multi-path situation of standby close energy easily occurs, and then causes the quality of reception to decline, or even is forced to interrupt communication.There is proposition
Cross using base station combination selection service antenna multiple to reduce to reach single direct-view ripple (Line of Sight, LoS) signal
Path effects.In frequency division multi-task (frequency domain multiplexing) system is applied to, the control of base you
Device can select remote antenna unit closest to mobile station as service antenna unit and close other remote antenna units to send out
Reception signal is sent, multi-path effect is reduced.
When cloth builds distributing antenna system, have and proposed the circuit of base station to each remote antenna unit to connect
Line or plus the mode of electronic delay means compensating into the identical propagation delay time.However, the above-mentioned practice needs additionally
Optical fiber or electronic delay means.The propagation delay time includes the signal transmission between optical fiber and air in distributing antenna system,
And signal in a fiber transmission speed is slow compared between air；And the fiber lengths that use are longer, transmit in permissible pure air
Covering scope is less.If want signal extend farther out if need higher density cloth to build mode；Otherwise, it is however generally that if wanting to be lifted
Single antenna covering scope can not then use longer optical fiber, and overall covering scope is compared with cannot be lifted.
The content of the invention
It is an object of the present invention to provide a kind of method of controlling antenna and system, can effectively solve the problem that many of antenna system
Heavy-route effect problem.Further it is proposed that asymmetric antenna system, can reduce antenna system enter row of channels adjustment
When computational complexity, and save the cloth of antenna system and build up this.
Example is implemented according to the present invention one, a kind of method of controlling antenna is proposed, is comprised the following steps.Define multigroup decay ginseng
Number and delay parameter.The multiple passages corresponding to multiple remote antenna units for obtaining a client terminal device and a base station ring
Should.Multiple channel characteristics values of those group of attenuation parameter of correspondence and delay parameter, those passages are calculated according to those channel responses
Characteristic value reacts the volume of transmitted data between the base station and the client terminal device.According to a default data transmission quantity, select and defeated
Go out corresponding this group of attenuation parameter and delay parameter.
Example is implemented according to the present invention one, propose a kind of antenna control system, including a measurement module, a control module with
And one postpone and attenuation module.Measurement module obtain a client terminal device and a base station corresponding to multiple remote antenna units
Multiple channel responses.It is multiple logical with delay parameter that control module calculates the multigroup attenuation parameter of correspondence according to those channel responses
Road characteristic value, those channel characteristics values react the volume of transmitted data between the base station and the client terminal device.Control module foundation
One one default channel characteristic value, selects and exports this group of attenuation parameter of corresponding characteristic value and delay parameter.Postpone and attenuation module
This group of attenuation parameter and delay parameter that realization is exported by the control module.
Example is implemented according to the present invention one, a kind of antenna control system, including multiple remote antenna blocks, a measurement is proposed
Module, a control module and one postpone and attenuation module.Each remote antenna block includes one first remote antenna unit
With one second remote antenna unit, the distance between the first remote antenna unit and a base station more than the second remote antenna unit with
Distance between the base station.Measurement module obtains a client terminal device and rings corresponding to multiple passages of those remote antenna units
Should.Control module calculates multiple channel characteristics values of the multiple attenuation parameter groups of correspondence according to those channel responses, and those passages are special
Value indicative reacts the volume of transmitted data between the base station and the client terminal device.Control module is according to an one default channel characteristic value, choosing
Select and export corresponding attenuation parameter group.Wherein attenuation module realizes the attenuation parameter group that exported by the control module to the plurality of
First remote antenna unit of remote antenna block.
Describe the present invention below in conjunction with the drawings and specific embodiments, but it is not as a limitation of the invention.
Description of the drawings
Figure 1A illustrates a communication system, illustrates including an enforcement example of the ACU antenna control unit according to the present invention
Figure；
Figure 1B illustrates another communication system, shows including another enforcement example of the ACU antenna control unit according to the present invention
It is intended to；
Fig. 1 C illustrate another communication system, show including another enforcement example of the ACU antenna control unit according to the present invention
It is intended to；
Fig. 2 is illustrated and is implemented exemplary flowchart according to the method for controlling antenna one of the present invention；
Fig. 3 illustrates the detail flowchart for implementing example according to the method for controlling antenna one of the present invention；
Fig. 4 is illustrated and is built schematic diagram according to the simple cloth of an enforcement example of the antenna control system of the present invention；
Fig. 5 illustrates the detail flowchart of another enforcement example of the method for controlling antenna according to the present invention；
Fig. 6 is illustrated and is built schematic diagram according to the simple cloth of another enforcement example of the antenna control system of the present invention.
Element wherein, reference
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：Demultiplexer
170：Client terminal device
610、610_1、610_2：Remote antenna block
648：Attenuation module
Specific embodiment
The enforcement example of method of controlling antenna Yu device proposed by the invention, using sending out for control remote antenna unit
Penetrate power and solve multi-path effect (multipath effect) problem of antenna system with time delay.Additionally, of the invention
Further propose asymmetric antenna control system, with reduce antenna system enter row of channels adjust when computational complexity.
Figure 1A is refer to, a communication system 100 includes the client terminal device of a base station (Base Station, BS) 120,
(subscriber) 170, one head-end unit (Head End Unit, HEU) 140 and multiple remote antenna unit (Remote
Antenna Unit, RAU) 160.
Communication wherein between head-end unit 140 and remote antenna unit 160 adopts optical fiber microwave (Radio over
Fiber, RoF) technology.Wherein, head-end unit 140 is to downlink (Downlink) signal by base station 120, distribution and
It is oriented to those remote antenna units 160；Remote antenna unit 160 the is collected up-link of client terminal device 170 simultaneously
(Uplink) signal, synthesis and guiding base station 120.
Head-end unit 140 includes a uplink and downlink signals controller 152, a splitter 156, a synthesizer 152, and many electric light turn
Parallel operation (E/O) 145, many optical-electrical converters (O/E) 147.Remote antenna unit 160 includes an optical-electrical converter 162, and an electric light turns
Parallel operation 161, a power amplifier 164, a low-noise amplifier 163, a uplink and downlink signals switch 165 and an antenna 166.
The down link signal that base station 120 sends is directed to splitter 156 by uplink and downlink signals controller 152, then
Demand is built according to actual antennas cloth, corresponding those quantity of remote antenna unit 160 of downstream signal is divided into splitter 156 many
Group signal, Jing electricals to optical converter (E/O) 145 are converted into area of light signal and deliver to should remote antenna unit 160 via optical fiber.Head
End unit 140 transfers the area of light signal of base station down link signal, and optical-electrical converter 162 is converted into electrical domain signal, Jing power
After the amplifying power of amplifier 164, Jing uplink and downlink signals controller 165 is directed to antenna 166 and sends.
The uplink signal of client terminal device 170 that those Jing antennas 166 of remote antenna unit 160 are collected, Jing is upper and lower
Row signal controller 165 be directed to low-noise amplifier 163 amplify after, Jing electricals to optical converter 161 be converted into area of light signal via
Optical fiber is delivered to should head-end unit 140.Optical-electrical converter 147 be converted into area of light signal again ECDC grow up to be a useful person it is 152 long-range with other
After the uplink signal synthesis that antenna element 160 transfers, using uplink and downlink signals controller 152 base station 120 is oriented to.
Wherein, uplink and downlink signals controller 152 with circulator (Circulator) or can be controlled by the switch of base station
(Switch) implement；And uplink and downlink signals controller 165 with circulator (Circulator) or can be controlled by down link signal
The switch (Switch) of power detector is implemented.
Figure 1A includes implementing example schematic, antenna control system 146 according to the antenna control system 146 1 of the present invention
At least include a measurement module 142, multiple delays and the control module 144 of attenuation module 148 and.Postpone in Figure 1A and decline
Subtract module 148 be to be implemented in head-end unit 140 as a example by illustrate, right not limited to this.Measurement module 142 obtains client dress
Put 170 and correspond to multiple channel responses of multiple remote antenna units 160 with base station 120.Measurement module 142 can be based on by upper
Downstream signal controller 152 is with reference to a timing reference signal (timing epoch) and those remote antenna units 160 is multiple
Uplink signal obtains those channel responses, and each channel response includes a signal strength values a and a delay time T.Should
Timing reference signal can be the frame initial time of a gps signal or downlink.Multiple delays are corresponding with attenuation module 148
Multiple remote antenna units 160, realize that the output correspondence of control module 144 postpones the remote antenna unit 160 with attenuation module 148
One group of attenuation parameter and delay parameter.
Control module 144 defines multigroup attenuation parameter (attenuation candidate) A and delay parameter (delay
Candidate) Δ, each group of attenuation parameter A is made up of and is corresponded to respectively those remote antenna units 160 multiple decay element α,
Multiple decay element α numerical value can be defined by the available equipment energy characteristic of system element and obtained；In the same manner, each group of delay parameter delta by
Multiple decay element δ compositions simultaneously correspond to respectively those remote antenna units 160, and multiple decay element δ numerical value can be by system element
Available equipment energy characteristic is defined and obtained.Control module 144 according to those channel responses calculate those group of attenuation parameters of correspondence with
Multiple channel characteristics values of delay parameter.Wherein, channel characteristics value is, for example, that r.m.s. postpones extension (Root Mean Square
Delay spread), mean excess delay (Mean Excess Delay) or the passage with peak signal difference within 3dB
Response time delay related to its etc., as long as channel characteristics value energy reactive group platform 120 and client terminal device
(subscriber) volume of transmitted data (channel transfer quality state) between 170, the such as intensity of variation of frequency response.Citing
For, r.m.s. delay extension is less, and the volume of transmitted data between base station 120 and client terminal device 170 is higher, channel transfer matter
Amount state is better.Following channel characteristics value postpones explanation, right not limited to this as a example by extension using r.m.s..
Control module 144 also can be selected and export corresponding in response to system design considerations according to an one default channel characteristic value
One group of attenuation parameter A and delay parameter delta.This one default channel characteristic value is to react, for example, a preferable volume of transmitted data or
One the maximum data transmission quantity.Control module 144 may be selected and export, and for example, correspondence minimum r.m.s. postpones the group of extension
Attenuation parameter A and delay parameter delta.By postpone with attenuation module 148 reach control remote antenna unit 160 signal transmitting when
Between and size.
Additionally, postponing also to be placed in remote antenna unit with attenuation module 148, Figure 1B is refer to, it illustrates a communication
System 100 ', including another enforcement example schematic of the antenna control system 146 according to the present invention.Remote antenna unit
160 ' multiple delays and attenuation module 168 realize the remote antenna of the corresponding delay of the output of control module 144 and attenuation module 168
The attenuation parameter and delay parameter of unit 160 '.One group of decay ginseng of the output correspondence remote antenna unit 160 ' of control module 144
Number and delay parameter, it is in the amplitude-modulated signal compared with low frequency, by many to be converted to an appropriate format control signal such as centre frequency
Business device 149 is integrated with down link signal, and by electrical to optical converter 145 (E/O) photoelectricity of remote antenna unit 160 ' is transferred to
Converter 162 (O/E), mono- demultiplexers of Jing 169 separate appropriate format control signal and down link signal.This appropriate lattice
It is this group of attenuation parameter and delay parameter that mono- controller of formula control signal Jing 167 is replied, and control postpones and attenuation module 168.
Fig. 1 C are refer to, it illustrates a communication system 100 ", including the antenna control system 146 ' according to the present invention
One implements example schematic.Antenna control system 146 ' includes：One measurement module 142, a control module 144, multiple decay modes
Block 648, and multiple remote antenna blocks 610.1C figures are a kind of framework of asymmetric distribution formula antenna system.
Multiple remote antenna blocks 610, each remote antenna block 610 include one first remote antenna unit 160 with
One second remote antenna unit 160, the distance between first remote antenna unit 160 and the base station 120 is second remote more than this
Distance between journey antenna element 160 and the base station 120.Measurement module 142 is to obtain a client terminal device corresponding to those
Multiple channel responses of remote antenna unit.Control module 144, to calculate the multiple decay ginsengs of correspondence according to those channel responses
Several multiple channel characteristics values, those channel characteristics values react the volume of transmitted data between the base station and the client terminal device, and
Select and export the attenuation parameter of one one default channel characteristic value of correspondence.Multiple attenuation modules 648, to realize control module 144
First remote antenna unit 160 in corresponding those remote antenna blocks 610 of those attenuation parameters of output.Fig. 2 is refer to, its
Illustrate the method for controlling antenna flow chart for implementing example according to the present invention one.In step S200, define multigroup attenuation parameter A with
Delay parameter delta.Each group of attenuation parameter A is made up of and is corresponded to respectively those remote antenna units 160 multiple decay element α, many
Individual decay element α numerical value can be defined by the available equipment energy characteristic of system element and obtained；In the same manner, each group of delay parameter delta is by more
Individual decay element δ compositions simultaneously correspond to respectively those units of remote antenna 160, and multiple decay element δ numerical value herein can be by system
The available equipment energy characteristic of element is defined and obtained.
In step S210, measuring unit 142 obtain a client terminal device and a base station 120 corresponding to it is multiple remotely
Multiple channel responses of antenna element 160, each channel response includes a signal strength values a and a delay time T.In step
In S220, control unit 144 calculates multiple passages of those group of attenuation parameter of correspondence and delay parameter according to those channel responses
Characteristic value, volume of transmitted data (the channel transfer quality between these channel characteristics value reactive group platforms 120 and the device of client 170
State).In step S230, control unit 144 selects and exports the corresponding group decay ginseng according to an one default channel characteristic value
Number and delay parameter.
Next hereby discuss that client terminal device is located at an ad-hoc location p and base station in a covering scope C of base station 120
The situation of correspondence to M remote antenna unit 160.Fig. 3 is refer to, it is illustrated according to a method of controlling antenna for implementing example
Detail flowchart.In step S300, multigroup attenuation parameter A and delay parameter delta are defined.Each group of attenuation parameter A is declined by multiple
Subtract element αkConstitute and correspond respectively to k-th remote antenna 160, multiple decay element αkNumerical value be able to can be provided by system element
Equipment energy characteristic definition and obtain；In the same manner, each group of delay parameter delta is by multiple decay element δkConstitute and correspond respectively to k-th
Remote antenna unit 160, the plurality of decay element δkNumerical value can be defined by the available equipment energy characteristic of system element and obtained, and k is 1
The positive integer of ~ M.In step S310, when the acquisition client terminal device 170 of measurement module 142 is located at ad-hoc location p, correspond to
The channel response of k-th remote antenna unit 160, this channel response includes a signal strength values ap, k and delay time T p,
K, k are the positive integer of 1 ~ M.
In step S322, each group of attenuation parameter and delay parameter are substituted into one by one.In step S324, control module
144 calculate when client terminal device 170 is located at ad-hoc location p according to those channel responses (ap, k and τ p, k), correspondence step
S322 substitutes into the channel characteristics value σ p of this group of attenuation parameter A and delay parameter delta, such as shown in formula (1).Channel characteristics value σ p
Can react when client terminal device 170 is located at ad-hoc location p, the volume of transmitted data between base station 120 and the device of client 170
(channel transfer quality state).
In step S326, judge that channel characteristics value σ p, whether more than acquiescence threshold value (one default channel characteristic value), writes from memory
Recognize threshold value and determined by testing, for example, 2.5 μ s.
When channel characteristics σ p is not less than acquiescence threshold value, then in step S330, control module 144 selects and exports not surpassing
Cross corresponding this group of attenuation parameter of channel characteristics value of acquiescence threshold valueWith delay parameterTo delay and attenuation module 148
To realize this group of attenuation parameter and delay parameter, improve client terminal device 170 positioned at ad-hoc location p when and base station 120 between
Channel transfer quality.When channel characteristics σ p exceedes acquiescence threshold value, then in step S327, control module 144 is found out preferably logical
Corresponding this group of attenuation parameter Ap of road characteristic value and delay parameter delta p, and in step S328, judge whether each group of decay ginseng
Number has been substituted into delay parameter.If it is not, then returning to step S322 is iterated operation.If so, then subsequent steps S330, control
Module 144 selects and exports corresponding this group of attenuation parameter of a preferable channel characteristics valueWith delay parameterExtremely postpone and decline
Subtract module 148, improve client terminal device 170 positioned at ad-hoc location p when channel transfer quality.In one implement example in, this compared with
Good channel characteristics value is a smallest passage characteristic value, then step S322 ~ S330 can be represented with formula (2), wherein TσFor pre- gating
Threshold value.
Fig. 4 is refer to, it illustrates the communication system 400 for implementing example including the antenna control system one according to the present invention
The simple cloth of signal transmission path build schematic diagram.The above-mentioned day of antenna control system application in Figure 1A, Figure 1B is explained by Fig. 4
Line control method, based on client terminal device 170 viewpoint of an ad-hoc location p is located at, and is found out and preferably change multiple remote antenna units
This group of attenuation parameter and delay parameter of 160 channel characteristics value, then controls the transmission power of remote antenna unit 160 and prolongs
Slow time, improve client terminal device 170 positioned at covering scope C when channel transfer quality, therefore spaced antenna system can be solved
Because of multi-path effect, caused message transmission rate declines problem in system.In the diagram, each postpones and attenuation module
148 are for example composed in series by delay element DLY with attenuating elements ATT.
Next hereby discuss that client terminal device 170 is located at any position and base station pair in the covering scope of base station 120
Should be to the situation of M those remote antenna units 160.Fig. 5 is refer to, it is illustrated according to another antenna for implementing example of the present invention
The detail flowchart of of control method.In step S500, multigroup attenuation parameter A and delay parameter delta are defined, each group
Attenuation parameter A is by multiple decay element αkConstitute and correspond respectively to k-th remote antenna 160, the plurality of decay element αkNumerical value
Defined by the available equipment energy characteristic of system element and obtained；In the same manner, each group of delay parameter delta is by multiple decay element δkComposition
And correspond respectively to k-th remote antenna 160, the plurality of decay element δkNumerical value is determined by the available equipment energy characteristic of system element
Justice and obtain, k be 1 ~ M positive integer.In step S510, measurement module 142 obtains client terminal device 170 and is located at any position p
When, corresponding to the channel response of k-th remote antenna unit 160, channel response includes that a signal strength values ap, k and postpone
Time τ p, k, k are the positive integer of 1 ~ M.
In step S522, each group of attenuation parameter and delay parameter are substituted into one by one.In step S524, control module
144 calculate when client terminal device 170 is located at covering scope C any positions p according to those channel responses (ap, k and τ p, k), right
Step S522 is answered to substitute into the channel characteristics value σ p of this group of attenuation parameter A and delay parameter delta, such as shown in formula (1).Passage is special
Value indicative σ p can be reacted when client terminal device 170 is located at covering scope C any positions p, base station 120 and client terminal device 170
Volume of transmitted data (channel transfer quality state) between device.
In step S526, calculate client terminal device 170 and be evenly distributed in covering scope C any positions p, those passages are special
Value indicative σ p gives tacit consent to the probability P of threshold value (one default channel characteristic value) more than one, such as shown in formula (3), wherein, TσIt is to be determined by experiment
Fixed predetermined threshold level, for example, 2.5 μ s.
In step S527, control module 144 finds out corresponding this group of attenuation parameter of minimum probabilityWith delay parameter
And in step S528, judge whether that each group of attenuation parameter has been substituted into delay parameter.If it is not, then return to step S522 entering
Row iteration is operated.If so, then subsequent steps S530, control module 144 selects and exports the corresponding group decay ginseng of minimum probability
NumberWith delay parameterTo postpone with attenuation module 148, with improve client terminal device 170 positioned at covering scope C when and base
Channel transfer quality between platform 120.Step S522 ~ S530 Essential Actions can be represented with formula (4).
Above-mentioned method of controlling antenna, based on client terminal device 170 viewpoint of covering scope C is located at, and finds out preferableization visitor
Channel characteristics value declines more than the group of the probability of acquiescence threshold value and between base station 120 when family end device 170 is located at covering scope C
Subtract parameter and delay parameter, then control adjusts transmission power and the time delay of remote antenna unit 160, improve client dress
The transmission quality that 170 are put when being located at covering scope C and between base station 120, therefore can solve in distributing antenna system because multiple
Path effects and caused message transmission rate decline problem.If environment is difficult to change, in the antenna system 100 of Figure 1B, can
Delay and attenuation module 168 are directly set according to attenuation parameter and delay parameter, and omits multiplexer 149, demultiplexer
169 with controller 167.
Additionally, as shown in fig. 6, it illustrates a communication system of another enforcement example including the antenna system according to the present invention
The simple cloth of signal transmission path of system 600 builds schematic diagram.By the above-mentioned day of the antenna control system application in Fig. 6 explanation figures 1C
Line control method.Communication system 600 includes a base station 120, a multiple remote antenna blocks 6101 and 6102, measurement module
(not being illustrated in figure), a control module (not being illustrated in figure) and attenuation module 648 (being made up of multiple attenuating elements).It is each
Individual remote antenna block 610 includes a remote antenna unit and another remote antenna unit, a remote antenna unit and base station
Distance between 120 is more than the distance between another remote antenna unit and base station 120.
The effect of measurement module and control module with described in above-mentioned method of controlling antenna, according to a default channel feature
Value, the final attenuation parameter for determining the preferable channel characteristics value of correspondence.Attenuation module realizes the decay of correspondence smaller channels characteristic value
Parameter is to those the first remote antenna units, for example, remote antenna unit 2 and 3.Say by taking remote antenna block 6101 as an example
Bright, the distance between remote antenna unit 2 and base station 120 is more than the distance between remote antenna unit 3 and base station 120, namely
Signal propagation delay time of the remote antenna unit 2 between optical fiber is longer.Therefore, the decay mode to be made up of attenuating elements ATT2
Block 648 applies attenuation parameter to reduce the transmission power of remote antenna unit 2, and maintains the transmission power of remote antenna unit 3.
So, in the case where being not required to adjust delay parameter, the multi-path effect of distributed antenna system 600 is reduced.And see
Fig. 6 is examined it is known that remote antenna unit its transmission power meeting in single remote antenna block apart from base station 120 farther out
It is attenuated.
Method of controlling antenna and the enforcement example of device that the above-mentioned enforcement example of the present invention is invented, according to a default channel
Characteristic value, find out preferableization client terminal device 170 positioned at covering scope C when and base station 120 between channel characteristics value, and control according to this
The transmission power of remote antenna unit processed and time delay, can effectively solving antenna system multi-path effect problem.Additionally,
The present invention reduces antenna system and enters computational complexity when row of channels is adjusted it is further proposed that asymmetric antenna system, and
The cloth for saving antenna system builds up this.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Know those skilled in the art and work as and various corresponding changes and deformation, but these corresponding changes and change can be made according to the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (19)
1. a kind of method of controlling antenna, it is characterised in that include：
Define multigroup attenuation parameter and delay parameter；
Obtain the multiple channel responses corresponding to multiple remote antenna units of a client terminal device and a base station；
Multiple channel characteristics values of those group of attenuation parameter of correspondence and delay parameter, those passages are calculated according to those channel responses
Characteristic value reacts the volume of transmitted data between the base station and the client terminal device；And
According to an one default channel characteristic value, corresponding this group of attenuation parameter and delay parameter, the default channel are selected and exported
Characteristic value is can to react a preferable volume of transmitted data or the maximum data transmission quantity.
2. method of controlling antenna according to claim 1, it is characterised in that those channel responses are believed based on a timing reference
Number and those remote antenna units multiple uplink signals and obtain, each channel response include a signal strength values and
One time delay.
3. method of controlling antenna according to claim 1, it is characterised in that the client terminal device is located at the one of the base station
An ad-hoc location in covering scope, and the step of those channel responses of the acquisition include：Obtain and be somebody's turn to do when the client terminal device is located at
Corresponding to those channel responses of those remote antenna units during ad-hoc location.
4. method of controlling antenna according to claim 3, it is characterised in that the step of those channel characteristics values of the calculating
Including：
Calculate when the client terminal device is located at the ad-hoc location according to those channel responses, corresponding to those group of attenuation parameter with
Those channel characteristics values of delay parameter.
5. method of controlling antenna according to claim 4, it is characterised in that the one default channel characteristic value is an acquiescence threshold
Value, this selects and includes the step of output：
Judge whether those channel characteristics values exceed the acquiescence threshold value；And
When one of those channel characteristics values are not less than the acquiescence threshold value, select and export and lead to not less than this of the acquiescence threshold value
Corresponding this group of attenuation parameter of road characteristic value and delay parameter.
6. method of controlling antenna according to claim 5, it is characterised in that the selection simultaneously also includes the step of export：
When those channel characteristics values exceed the acquiescence threshold value, the passage for selecting and exporting one tentation data transmission quantity of correspondence is special
Corresponding this group of attenuation parameter of value indicative and delay parameter.
7. method of controlling antenna according to claim 1, it is characterised in that the client terminal device is located at the one of the base station
Any position in covering scope, and it is described acquisition those channel responses the step of include：Obtain and be somebody's turn to do when the client terminal device is located at
Those channel responses in covering scope during any position corresponding to those remote antenna units.
8. method of controlling antenna according to claim 7, it is characterised in that the step of those channel characteristics values of the calculating
Including：
Calculate when the client terminal device is located at any position in the covering scope according to those channel responses, correspond to those groups and decline
Subtract those channel characteristics values of parameter and delay parameter.
9. method of controlling antenna according to claim 8, it is characterised in that the one default channel characteristic value is an acquiescence threshold
Value, this selects and includes the step of output：
Calculate each group of attenuation parameter and the probability of threshold value is given tacit consent to more than one with those channel characteristics values corresponding to delay parameter；
And
Select and export corresponding this group of attenuation parameter of minimum of a value and delay parameter of those probabilities.
10. a kind of antenna control system, it is characterised in that include：
One measurement module, to obtain a client terminal device and a base station corresponding to the multiple logical of multiple remote antenna units
Road is responded；
One control module, it is special with multiple passages of delay parameter to calculate the multigroup attenuation parameter of correspondence according to those channel responses
Value indicative, those channel characteristics values react the volume of transmitted data between the base station and the client terminal device, and according to a default channel
Characteristic value, selects and exports corresponding this group of attenuation parameter and delay parameter, and the one default channel characteristic value is can to react one
Preferable volume of transmitted data or the maximum data transmission quantity；And
Multiple delays and attenuation module, to this group of attenuation parameter realizing being exported by the control module and delay parameter.
11. antenna control systems according to claim 10, it is characterised in that the measurement module is believed based on a timing reference
Number and multiple uplink signals of those remote antenna units obtain those channel responses, each channel response includes a letter
Number intensity level and a time delay.
12. antenna control systems according to claim 10, it is characterised in that the client terminal device is located at the base station
An ad-hoc location in one covering scope, and measurement module acquisition corresponds to this when the client terminal device is located at the ad-hoc location
Those channel responses of a little remote antenna units.
13. antenna control systems according to claim 12, it is characterised in that the control module is according to those channel responses
Calculate when the client terminal device is located at the ad-hoc location, it is special corresponding to those passages of those group of attenuation parameter and delay parameter
Value indicative.
14. antenna control systems according to claim 13, it is characterised in that the one default channel characteristic value is an acquiescence door
Threshold value, the control module judges whether those channel characteristics values exceed the acquiescence threshold value, when one of those channel characteristics values
Not less than the acquiescence threshold value, the control module is selected and exports corresponding not less than the channel characteristics value of the acquiescence threshold value
This group of attenuation parameter and delay parameter.
15. antenna control systems according to claim 14, it is characterised in that when those channel characteristics values are write from memory more than this
Recognize threshold value, the control module selects and export corresponding group decay ginseng of channel characteristics value of one tentation data transmission quantity of correspondence
Number and delay parameter.
16. antenna control systems according to claim 10, it is characterised in that the client terminal device is located at the base station
Any position in one covering scope, and measurement module acquisition is when the client terminal device is located at any position in the covering scope
Corresponding to those channel responses of those remote antenna units.
17. antenna control systems according to claim 16, it is characterised in that the control module is according to those channel responses
Calculate when the client terminal device is located at any position in the covering scope, corresponding to those group of attenuation parameter and delay parameter
Those channel characteristics values.
18. antenna control systems according to claim 17, it is characterised in that the one default channel characteristic value is an acquiescence door
Threshold value, the control module calculates each group of attenuation parameter and is more than the acquiescence door with those channel characteristics values corresponding to delay parameter
The probability of threshold value, and the control module selects and exports corresponding this group of attenuation parameter of minimum of a value and delay ginseng of those probabilities
Number.
19. a kind of antenna control systems, it is characterised in that include：
Multiple remote antenna blocks, each remote antenna block includes one first remote antenna unit and one second remote antenna
Unit, the distance between first remote antenna unit and a base station is more than between second remote antenna unit and the base station
Distance；
One measurement module, to obtain multiple channel responses of the client terminal device corresponding to those remote antenna units；And
One control module, to multiple channel characteristics values that the multiple attenuation parameter groups of correspondence are calculated according to those channel responses, should
A little channel characteristics values react the volume of transmitted data between the base station and the client terminal device, and according to an one default channel characteristic value,
Corresponding attenuation parameter group is selected and exports, the one default channel characteristic value is can to react a preferable volume of transmitted data or one
The maximum data transmission quantity；
Wherein the plurality of attenuation module, to the attenuation parameter group realizing being exported by the control module to the plurality of remote antenna area
First remote antenna unit of block.
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| TW101127244 | 2012-07-27 | ||
| TW101127244A TWI489838B (en) | 2012-07-27 | 2012-07-27 | Antenna control method and system thereof |
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| CN109041087A (en) * | 2018-07-31 | 2018-12-18 | 复旦大学 | WiFi signal acquisition, visualization and fault location system towards campus network |
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| CN1230311A (en) * | 1996-07-18 | 1999-09-29 | 艾利森公司 | System and method for equalizing delay time for transmission paths in distributed antenna network |
| CN101166068A (en) * | 2006-08-31 | 2008-04-23 | 三星电子株式会社 | Radio over fiber system and method for controlling transmission time |
| CN201174765Y (en) * | 2008-04-09 | 2008-12-31 | 厦门特力通信息技术有限公司 | Self-adapting base station pulling far apparatus |
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| US7072413B2 (en) * | 2001-05-17 | 2006-07-04 | Qualcomm, Incorporated | Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion |
| TWI283135B (en) * | 2004-04-07 | 2007-06-21 | Benq Corp | Communication channel characteristic estimation method |
| TW200635403A (en) * | 2005-03-17 | 2006-10-01 | Askey Computer Corp | Inpsection system of wireless communication performance |
| US20100329370A1 (en) * | 2009-04-28 | 2010-12-30 | Beceem Communications Inc. | Selection of a Subset of Antennas for Transmission |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230311A (en) * | 1996-07-18 | 1999-09-29 | 艾利森公司 | System and method for equalizing delay time for transmission paths in distributed antenna network |
| CN101166068A (en) * | 2006-08-31 | 2008-04-23 | 三星电子株式会社 | Radio over fiber system and method for controlling transmission time |
| CN201174765Y (en) * | 2008-04-09 | 2008-12-31 | 厦门特力通信息技术有限公司 | Self-adapting base station pulling far apparatus |
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| TW201406117A (en) | 2014-02-01 |
| CN103580734A (en) | 2014-02-12 |
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