CN102932894A - Communication system and method for controlling radio frequency output power - Google Patents
Communication system and method for controlling radio frequency output power Download PDFInfo
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- CN102932894A CN102932894A CN2011102271131A CN201110227113A CN102932894A CN 102932894 A CN102932894 A CN 102932894A CN 2011102271131 A CN2011102271131 A CN 2011102271131A CN 201110227113 A CN201110227113 A CN 201110227113A CN 102932894 A CN102932894 A CN 102932894A
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Abstract
The invention discloses a communication system for controlling radio frequency output power. The communication system comprises a first radio frequency device and a second radio frequency device, wherein communication distance between the first radio frequency device and the second radio frequency device are determined according to the strength of a low-frequency signal; the radio frequency output power of radio frequency communication between the first radio frequency device and the second radio frequency device is set according to the communication distance; and the first radio frequency device and the second radio frequency device transmit radio frequency signals according to the radio frequency output power and communicate with each other. Moreover, the invention also provides a method for controlling the radio frequency output power. By adoption of the technical scheme provided by the invention, the controllability of the radio frequency output power can be realized, the size of the radio frequency output power is adjusted in real time according to the communication distance, the aims of saving energy and reducing the consumption of radio frequency power can be fulfilled, and the application efficiency of the radio frequency power can be maximized. Moreover, by controlling the switch-on and switch-off state of a radio frequency signal transceiver, the aim of reducing the consumption of the radio frequency output power is fulfilled to the greatest extent.
Description
Technical field
The present invention relates to a kind of communication system and method for controlling radio frequency power output.
Background technology
In recent years, wireless communication technique is advanced by leaps and bounds, and WLAN etc. are used more prevalent and acquisition user group more and more, such as the application of Wifi, increasing portable terminal is compatible to be used, and can say that soon each corner, the world in the future will have the network of a wireless local.These networks all are to adopt radiofrequency signal to carry out data interaction, but since radio-frequency communication easily affected by environment, communication distance be difficult in check characteristics, the user can't judge the limitation scope of application, so each radio frequency applications needs the strict application model of formulating the management of access authority or adopting the formula of opening to the outside world fully for the less demanding occasion of level security, this has increased undoubtedly the complexity of user's use and has reduced Information Security.
In addition, wireless telecommunications system such as mobile phone etc. are more to the low-power consumption trend development, and one satisfies the requirement of saving the energy, and two can reach performances such as optimizing stand-by time by reducing power consumption, and because temperature reduces the purpose that reaches the extension device aging life-span.Adjust best radio frequency power output if wireless telecommunications system can satisfy according to the distance of radio frequency transmission, then can avoid the waste of power, solve above-mentioned power problems.
Summary of the invention
Technical problem to be solved by this invention provides a kind of communication system and the method that can adjust in real time radio frequency power output according to communication distance.
As the one side of technical solution of the present invention, a kind of communication system of controlling radio frequency power output is provided, comprise the first radio-frequency unit and the second radio-frequency unit; Wherein,
Described the first radio-frequency unit and described the second radio-frequency unit are determined communication distance between described the first radio-frequency unit and described the second radio-frequency unit by the intensity of low frequency signal, and determine the radio frequency power output of described the first radio-frequency unit and described the second radio-frequency unit according to this communication distance;
Described the first radio-frequency unit and described the second radio-frequency unit communicate according to described radio frequency power output emitting radio frequency signal.
Further, described the first radio-frequency unit comprises the first controller, the first radio-frequency signal transceiver, the first low frequency signal transceiver, and described the first controller links to each other with described the first radio-frequency signal transceiver, described the first low frequency signal transceiver respectively;
Described the first radio-frequency signal transceiver is used for the instruction transmitting-receiving radiofrequency signal according to described the first controller;
Described the first low frequency signal transceiver is used for the instruction transmitting-receiving low frequency signal according to described the first controller;
Described the first controller is for the communication distance of judging according to the intensity of described low frequency signal between described the first radio-frequency unit and described the second radio-frequency unit; And set the radio frequency power output that described the first radio-frequency unit and described the second radio-frequency unit carry out radio communication according to described communication distance.
Further, described the first controller is also for the on off state of controlling described the first radio-frequency signal transceiver.
Further, preserve mapping table between described low frequency signal intensity and described communication distance and the described radio frequency power output in described the first controller;
Described mapping table is used for according to described low frequency signal intensity, determines described communication distance, and sets described radio frequency power output.
Further, described the second radio-frequency unit comprises second controller, the second radio-frequency signal transceiver, the second low frequency signal transceiver, and described second controller links to each other with described the second radio-frequency signal transceiver, described the second low frequency signal transceiver respectively;
Described the second radio-frequency signal transceiver is used for the instruction transmitting-receiving radiofrequency signal according to described second controller;
Described the second low frequency signal transceiver is used for the instruction transmitting-receiving low frequency signal according to described second controller;
Described second controller is for the communication distance of judging according to the intensity of described low frequency signal between described the second radio-frequency unit and described the first radio-frequency unit; And set the radio frequency power output that described the second radio-frequency unit and described the first radio-frequency unit carry out radio communication according to described communication distance.
Further, described second controller is also for the on off state of controlling described the second radio-frequency signal transceiver.
Further, preserve mapping table between described low frequency signal intensity and described communication distance and the described radio frequency power output in the described second controller;
Described mapping table is used for according to described low frequency signal intensity, determines described communication distance, and sets described radio frequency power output.
Further, the frequency of the low frequency signal of described the first radio-frequency unit and described the second radio-frequency unit emission is 500kHz～100MHz.
As technical solution of the present invention on the other hand, provide a kind of method of controlling radio frequency power output, finish the setting of power output according to following steps:
The second radio-frequency unit obtains the intensity of the low frequency signal of the first radio-frequency unit transmission, and judges the communication distance between described the first radio-frequency unit and described the second radio-frequency unit;
Described the second radio-frequency unit is set the radio frequency power output that communicates between described the first radio-frequency unit and described the second radio-frequency unit according to described communication distance;
Described the first radio-frequency unit and described the second radio-frequency unit communicate according to described radio frequency power output emitting radio frequency signal.
Further, described the second radio-frequency unit is regulated and control the radio frequency power output of described the first radio-frequency unit and described the second radio-frequency unit according to following steps,
Described the second radio-frequency unit is set the radio frequency power output of described the second radio-frequency unit by described communication distance;
The described radio frequency power output that described the second radio-frequency unit will be set is sent to described the first radio-frequency unit;
Described the first radio-frequency unit receives described radio frequency power output, and sets the emission of radio frequency signals power that itself and described the second radio-frequency unit communicate according to described radio frequency power output.
Further, preserve mapping table between described low frequency signal intensity and described communication distance and the described radio frequency power output in described the second radio-frequency unit;
Described the second radio-frequency unit is responded to described low frequency signal, and obtains the intensity of described low frequency signal, determines described communication distance according to described mapping table again;
Described the second radio-frequency unit is determined described communication distance, determines described radio frequency power output according to described mapping table again, and described radio frequency power output is sent to described the first radio-frequency unit.
Further, the frequency of described low frequency signal is 500kHz～100MHz.
The invention has the beneficial effects as follows:
1. adopt technical solution of the present invention just can realize the Modulatory character of radio frequency power output, adjust in real time the size of radio frequency power output according to communication distance, just can reach the purpose of saving the energy, reducing radio-frequency power consumption, also can make simultaneously the application efficiency of radio-frequency power reach maximization.
2. when technical solutions of the utility model are carried out radio communication in guaranteeing the safe decipherment distance of realization, also by the on off state of control radio-frequency signal transceiver, reach the purpose of further reduction radio frequency output power consumption.
Description of drawings
Fig. 1 is the formation schematic diagram of the present invention's communication system of controlling radio frequency power output;
Fig. 2 is the schematic flow sheet that the present invention controls the first implementation of radio frequency power output method;
Fig. 3 is the schematic flow sheet that the present invention controls the second implementation of radio frequency power output method.
Embodiment
Below in conjunction with accompanying drawing principle of the present invention and feature are described, institute gives an actual example and only is used for explaining the present invention, is not be used to limiting scope of the present invention.
As the one side of technical solution of the present invention, a kind of communication system of controlling radio frequency power output is provided, referring to Fig. 1, this communication system comprises the first radio-frequency unit 1 and the second radio-frequency unit 2.The first radio-frequency unit 1 and the second radio-frequency unit 2 are determined communication distance between the first radio-frequency unit 1 and the second radio-frequency unit 2 by the intensity of low frequency signal, and determine the radio frequency power output of the first radio-frequency unit 1 and the second radio-frequency unit 2 according to this communication distance.The first radio-frequency unit 1 and the second radio-frequency unit 2 communicate according to the radio frequency power output emitting radio frequency signal.So just realize the Modulatory character of radio frequency power output, adjusted in real time the size of radio frequency power output according to the distance of (namely between the first radio-frequency unit 1 and the second radio-frequency unit 2) between the communication terminal, reached the purpose of saving the energy, reducing radio-frequency power consumption.
Further, the first radio-frequency unit 1 is identical with the formation structure of the second radio-frequency unit 2.The below illustrates the formation structure of the two as an example of the first radio-frequency unit 1 example.
As shown in Figure 1, the first radio-frequency unit 1 comprises that the first controller 11, the first radio-frequency signal transceiver 12, the first low frequency signal transceiver 13, the first controllers 11 link to each other with the first radio-frequency signal transceiver 12, the first low frequency signal transceiver 13 respectively.Wherein, the first radio-frequency signal transceiver 12 is used for the instruction transmitting-receiving radiofrequency signal according to the first controller 11.The first low frequency signal transceiver 13 is used for the instruction transmitting-receiving low frequency signal according to the first controller 11.The first controller 11 is also for the communication distance of judging according to the intensity of low frequency signal between the first radio-frequency unit 1 and the second radio-frequency unit 2; And set the radio frequency power output that carries out radio communication between the first radio-frequency unit 1 and the second radio-frequency unit 2 according to communication distance.The technique scheme of radio-frequency unit just is to judge communication distance by low frequency signal among the present invention, and then the realization of definite radiofrequency signal power output provides technical foundation.
Further, the first controller 11 in the first radio-frequency unit 1 also is used for the on off state that control the first radiofrequency signal is received 12 hair devices, and/or the second controller 21 in the second radio-frequency unit 2 also is used for the on off state of control the second radio-frequency signal transceiver 22.Controller can be controlled radio-frequency signal transceiver and be in open mode always, also can be only when needs pass through the radio-frequency channel receiving and transmitting signal, controller is just controlled radio-frequency signal transceiver and is opened transmission channel or receive path, the power consumption that produces in the time of so just can avoiding radio-frequency signal transceiver not work further reduces radio frequency output power consumption.
Receive low frequency signal and judge the first radio-frequency unit 1 and the second radio-frequency unit 2 between communication distance after, the power output of carrying out radio communication in order to set exactly the first radio-frequency unit 1 and the second radio-frequency unit 2, the first controller 11 and the second controller 21 interior mapping tables of all preserving between low frequency signal intensity and communication distance and the radio frequency power output.After sensing low frequency signal, judge the intensity of this signal, and the relativity table, and then can determine easily communication distance and radio frequency power output.
As technical solution of the present invention on the other hand, also provide a kind of method of controlling radio frequency power output, finish the setting of power output according to following steps:
At first, the second radio-frequency unit 2 obtains the intensity of the low frequency signal of the first radio-frequency unit 1 transmission, and judges the communication distance between the first radio-frequency unit 1 and the second radio-frequency unit 2;
Secondly, the second radio-frequency unit 2 is set the radio frequency power output that communicates between the first radio-frequency unit 1 and the second radio-frequency unit 2 according to communication distance;
At last, the first radio-frequency unit 1 receives the radio frequency power output that the second radio-frequency unit 2 is set, and according to the radio frequency power output emitting radio frequency signal, communicates with the second radio-frequency unit 2.
The below simply introduces the course of work of the communication system of control radio frequency power output of the present invention, as shown in Figure 2.
Step 1, the first controller 11 controls the first low frequency signal transceiver 13 in the first radio-frequency unit 1 sends low frequency signal, and the frequency of this low frequency signal can be 500kHz～100MHz.Second controller 21 controls the second low frequency signal transceiver 23 in the second radio-frequency unit 2 is responded to the magnetic field that these low frequency signals produce, and judges the size in this magnetic field, determines communication distance.
Wherein, the mode of the first low frequency signal transceiver 13 emission low frequency magnetic fields can adopt the coil drive type, also can adopt the coil resonance type.And the low frequency magnetic field of emission can be the field signal that the preset number signal is modulated up, also can be frequency, the cycle is certain or amplitude is certain or the certain alternating magnetic field of change sequence feature (the change sequence feature is the digital signal that can embody signal frequency, cycle).
The second low frequency signal transceiver 23 is judged communication distance between the first radio-frequency unit 1 and the second radio-frequency unit 2 by the intensity of judging low frequency signal, namely determine communication distance by the size of judging low frequency magnetic field, for example, can determine communication distance with the characteristic value of variable in distance by amplitude or other meeting of obtaining magnetic field.
If the carrier of emission low frequency signal is circular low-frequency coil, then the relation between low frequency signal intensity and the communication distance (be the low frequency field intensity the magnetic field intensity on its coil central axe and the relation between the communication distance) is as follows:
H=iNa
2/ 2 (a
2+ r
2)
3/2, wherein,
H is magnetic field intensity; I is electric current, and unit is A; N is the number of turn of circular low-frequency coil; A is the radius of circular low-frequency coil, and unit is m; R is the length apart from the coil central point, i.e. communication distance, and unit is m.
Certainly, the carrier of emission low frequency signal is except being circular coil, also can be other shapes or other forms of carrier (such as giant reluctivity device), can select the magnetic field intensity of corresponding low frequency field intensity and the computing formula between the communication distance according to the carrier format of selecting.
Wherein, the relation between radio frequency power output and the communication distance is as follows:
Radio frequency power output=receiving sensitivity+Los, Los is propagation loss.
Los=32.44+20logD(km)+20logf(MHz), D is communication distance, and f is operating frequency.
So just can according to the above-mentioned low frequency magnetic field intensity of mentioning and the relation between the communication distance and the relation between radio frequency power output and the communication distance, determine the corresponding relation between low frequency signal intensity and the radio frequency power output.
Further, mobile and cause the unsettled situation of signal strength signal intensity to occur in communication process for fear of the first radio-frequency unit 1 and the second radio-frequency unit 2, second controller 21 can amplify the radio frequency power output that sets n and export to the first radio-frequency unit 1 after doubly again.Wherein, n can be for greater than 1 any number.This just can guarantee the stability that communicates between the first radio-frequency unit 1 and the second radio-frequency unit 2.
Step 3, second controller 21 is sent to the first radio-frequency unit 1 by the second low frequency signal transceiver 23 and/or the second radio-frequency signal transceiver 22 with the radio frequency power output information that sets.
Step 4, the first radio-frequency unit 1 receives the radio frequency power output information that the second radio-frequency unit 2 sends, by the power of the first controller 11 according to this information setting the first radio-frequency unit 1 emitting radio frequency signal.
If the second radio-frequency unit 2 sends the radio frequency power output information that sets by the second low frequency signal transceiver 23, then the first radio-frequency unit 1 receives by the first low frequency signal transceiver 13 of its inside, and is sent to the first controller 11.If the second radio-frequency unit 2 sends the radio frequency power output information that sets by the second radio-frequency signal transceiver 22, then the first radio-frequency unit 1 receives by the first radio-frequency signal transceiver 12 of its inside, and is sent to the first controller 11.
Step 5, the first radio-frequency unit 1 and the second radio-frequency unit 2 are communicated by letter in safe distance according to the radio-frequency power that sets, and finish the information transmission work between the two.When for example communication system of the present invention is used for transaction, the two just can be in the interior communication of the controlled distance of safety, guarantees to conclude the business normally to carry out and when concluding the business legitimacy, also by monitoring in real time the distance between the communication terminal, adjust radio frequency power output, reach the purpose that reduces radio-frequency power consumption.
In the above-mentioned course of work, the first radio-frequency signal transceiver 12 and the second radio-frequency signal transceiver 22 can be in the operating state of opening always, and namely the transmitting chain of the first radio-frequency signal transceiver 12 and the second radio-frequency signal transceiver 22 and receiver are in the state that can work all the time.And in order farthest to reduce radio-frequency power consumption, also can be by the on off state of the first controller 11 controls the first radio-frequency signal transceiver 12, by the on off state of second controller 21 controls the second radio-frequency signal transceiver 22.
As shown in Figure 3, for example, after the first low frequency signal transceiver 13 in the first radio-frequency unit 1 sent low frequency signal, the first controller 11 was controlled the first radio-frequency signal transceiver 12 again and is opened receiver, closes transmitting chain.After second controller 21 set radio frequency power output, second controller 21 was controlled the second radio-frequency signal transceiver 22 again and is opened the transmission link, closes receiver.The unnecessary power consumption of its generation in the time of so just can avoiding need not radio-frequency signal transceiver work reaches the purpose of further reduction power consumption.
Below only be preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a communication system of controlling radio frequency power output is characterized in that, comprises the first radio-frequency unit and the second radio-frequency unit; Wherein,
Described the first radio-frequency unit and described the second radio-frequency unit are determined communication distance between described the first radio-frequency unit and described the second radio-frequency unit by the intensity of low frequency signal, and determine the radio frequency power output of described the first radio-frequency unit and described the second radio-frequency unit according to this communication distance;
Described the first radio-frequency unit and described the second radio-frequency unit communicate according to described radio frequency power output emitting radio frequency signal.
2. the communication system of control radio frequency power output according to claim 1 is characterized in that,
Described the first radio-frequency unit comprises the first controller, the first radio-frequency signal transceiver, the first low frequency signal transceiver, and described the first controller links to each other with described the first radio-frequency signal transceiver, described the first low frequency signal transceiver respectively;
Described the first radio-frequency signal transceiver is used for the instruction transmitting-receiving radiofrequency signal according to described the first controller;
Described the first low frequency signal transceiver is used for the instruction transmitting-receiving low frequency signal according to described the first controller;
Described the first controller is for the communication distance of judging according to the intensity of described low frequency signal between described the first radio-frequency unit and described the second radio-frequency unit; And set the radio frequency power output that described the first radio-frequency unit and described the second radio-frequency unit carry out radio communication according to described communication distance.
3. the communication system of control radio frequency power output according to claim 2 is characterized in that,
Described the first controller is also for the on off state of controlling described the first radio-frequency signal transceiver.
4. according to claim 2 or the communication system of 3 described control radio frequency power outputs, it is characterized in that,
Preserve the mapping table between described low frequency signal intensity and described communication distance and the described radio frequency power output in described the first controller;
Described mapping table is used for according to described low frequency signal intensity, determines described communication distance, and sets described radio frequency power output.
5. the communication system of control radio frequency power output according to claim 1 is characterized in that,
Described the second radio-frequency unit comprises second controller, the second radio-frequency signal transceiver, the second low frequency signal transceiver, and described second controller links to each other with described the second radio-frequency signal transceiver, described the second low frequency signal transceiver respectively;
Described the second radio-frequency signal transceiver is used for the instruction transmitting-receiving radiofrequency signal according to described second controller;
Described the second low frequency signal transceiver is used for the instruction transmitting-receiving low frequency signal according to described second controller;
Described second controller is for the communication distance of judging according to the intensity of described low frequency signal between described the second radio-frequency unit and described the first radio-frequency unit; And set the radio frequency power output that described the second radio-frequency unit and described the first radio-frequency unit carry out radio communication according to described communication distance.
6. the communication system of control radio frequency power output according to claim 5 is characterized in that,
Described second controller is also for the on off state of controlling described the second radio-frequency signal transceiver.
7. according to claim 5 or the communication system of 6 described control radio frequency power outputs, it is characterized in that,
Preserve the mapping table between described low frequency signal intensity and described communication distance and the described radio frequency power output in the described second controller;
Described mapping table is used for according to described low frequency signal intensity, determines described communication distance, and sets described radio frequency power output.
8. a method of controlling radio frequency power output is characterized in that,
The second radio-frequency unit obtains the intensity of the low frequency signal of the first radio-frequency unit transmission, and judges the communication distance between described the first radio-frequency unit and described the second radio-frequency unit;
Described the second radio-frequency unit is set the radio frequency power output of described the first radio-frequency unit and described the second radio-frequency unit according to described communication distance;
Described the first radio-frequency unit and described the second radio-frequency unit communicate according to described radio frequency power output emitting radio frequency signal.
9. the method for control radio frequency power output according to claim 8 is characterized in that,
Described the second radio-frequency unit is regulated and control the radio frequency power output of described the first radio-frequency unit and described the second radio-frequency unit according to following steps:
Described the second radio-frequency unit is set the radio frequency power output of described the second radio-frequency unit by described communication distance;
The described radio frequency power output that described the second radio-frequency unit will be set is sent to described the first radio-frequency unit;
Described the first radio-frequency unit receives described radio frequency power output, and sets the emission of radio frequency signals power that itself and described the second radio-frequency unit communicate according to described radio frequency power output.
10. the method for control radio frequency power output according to claim 9 is characterized in that,
Preserve the mapping table between described low frequency signal intensity and described communication distance and the described radio frequency power output in described the second radio-frequency unit;
Described the second radio-frequency unit is responded to described low frequency signal, and obtains the intensity of described low frequency signal, determines described communication distance according to described mapping table again;
Described the second radio-frequency unit is determined described communication distance, determines described radio frequency power output according to described mapping table again, and described radio frequency power output is sent to described the first radio-frequency unit.
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| CN104868955A (en) * | 2015-04-09 | 2015-08-26 | 北京橙鑫数据科技有限公司 | Data transmission method and device |
| WO2017140090A1 (en) * | 2016-02-17 | 2017-08-24 | 中兴通讯股份有限公司 | Method for adjusting radio-frequency power, zigbee router, sensor and system |
| CN110087299A (en) * | 2018-01-26 | 2019-08-02 | 翔升（上海）电子技术有限公司 | Method, apparatus, equipment and the medium of adjust automatically radio-frequency power |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014166249A1 (en) * | 2013-07-19 | 2014-10-16 | 中兴通讯股份有限公司 | Adaptive and power-controllable wifi adjusting method and device |
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| CN104868955A (en) * | 2015-04-09 | 2015-08-26 | 北京橙鑫数据科技有限公司 | Data transmission method and device |
| WO2017140090A1 (en) * | 2016-02-17 | 2017-08-24 | 中兴通讯股份有限公司 | Method for adjusting radio-frequency power, zigbee router, sensor and system |
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Application publication date: 20130213 |