CN101944937B - Power carrier communication system and method - Google Patents
Power carrier communication system and method Download PDFInfo
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- CN101944937B CN101944937B CN 200910151279 CN200910151279A CN101944937B CN 101944937 B CN101944937 B CN 101944937B CN 200910151279 CN200910151279 CN 200910151279 CN 200910151279 A CN200910151279 A CN 200910151279A CN 101944937 B CN101944937 B CN 101944937B
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Abstract
The invention relates to a power carrier communication system and a method. The system comprises a concentrator and at least one terminal which are connected through a power line and used for carrying out carrier communication, wherein the concentrator and the terminals all comprise a microcontroller, a clock, a memory and a carrier communication module; each carrier communication module comprises at least two switchable modulation frequencies; the memories on the concentrator and the terminals all save a time interval modulation frequency configuration table; and the microcontrollers on the concentrator and the terminals select the modulation frequencies of the carrier communication modules through reading the information of the time interval modulation frequency configuration table. Thecommunication system usually requires that all the terminals at least can successfully communicate once within a specific communication period, and the unsuccessfully communicated terminals carry outcomplementary communication in subsequent time. If different modulation frequencies can be changed within a communication period for communication, noise interference on some modulation frequencies can be effectively avoided so as to effectively improve the communication success rate.
Description
Technical field
The present invention relates to a kind of communication system and method, especially adopt the system and method for power line communication.
Background technology
In the kilowatt meter reading-out systems such as water meter, ammeter and/or gas meter that adopt power line communication to realize, owing to there is the use of nonstandard electric equipment, can have noise jamming on the channel of carrier communication, these noises have very big influence to the communication efficiency of power line carrier communication.
Power line carrier communication equipment can be supported a plurality of modulating frequencies usually, but synchronization can only select a frequency to communicate, and the both sides of communication must adopt just possibility success communication of identical modulating frequency.
Existing kilowatt meter reading-out system has just been selected a modulating frequency when normally designing in system artificially, and equipment is installed to after the scene, can not change communication frequency.Wherein, the power carrier concentrator adopts polling mode and each power carrier terminal regularly to carry out communication usually, in case there is a fixing noise source interference erecting bed to selecting modulating frequency, then the communication of whole system may be paralysed fully.
As seen, existing systems is difficult to adapt to site environment complicated and changeable.
Summary of the invention
One object of the present invention is, a kind of power-line carrier communication system is provided, and this system is the statistical analysis communication quality periodically, and strategically carries out the Dynamic Selection of carrier modulation frequency accordingly, effectively to evade the noise jamming on some modulating frequency, significantly improve the communication success rate.
In order to realize above-mentioned purpose, the invention provides a kind of power-line carrier communication system, comprise the concentrator and at least one terminal that link together and carry out carrier communication by power line, include microcontroller on concentrator and the terminal, clock, memory and carrier communication module, this carrier communication module comprises at least two kinds, switchable modulating frequency, all preserve period modulating frequency allocation list in the memory on concentrator and the terminal, microcontroller on concentrator and the terminal is selected the modulating frequency of carrier communication module by reading the information of period modulating frequency allocation list.
Further, in order to realize above-mentioned purpose, the present invention proposes a kind of power line carrier communication method, concentrator and at least one terminal are linked together and carry out carrier communication by power line, be provided with microcontroller at concentrator and terminal, clock, memory and carrier communication module, make this carrier communication module have at least two kinds, switchable modulating frequency, all preserve period modulating frequency allocation list in the memory on concentrator and terminal, make microcontroller on concentrator and the terminal by reading the information of period modulating frequency allocation list, come the modulating frequency of carrier communication module is selected.
Wherein, period modulating frequency allocation list comprises a plurality of records, and each record comprises the modulating frequency that beginning and ending time of period and this period adopt.
All modulating frequencies of carrier communication module occur once in period modulating frequency allocation list at least.
Concentrator is periodically added up the overall system communication success rate of each period, when the overall communication success rate that has at least one period is lower than the threshold values of setting, upgrade period modulating frequency allocation list, and the period modulating frequency after will upgrading sends to all terminals with its communication.
Microcontroller on concentrator and the terminal is selected the modulating frequency of carrier communication module by reading the information of the period modulating frequency allocation list after the renewal.
When concentrator is lower than the threshold values of setting in the overall communication success rate of a period, the modulating frequency that this period selects for use is adjusted according to strategy.
The strategy that concentrator is adjusted is, if there is previous original modulating frequency in the period, select a previous original modulating frequency to rewrite modulating frequency content in this period corresponding record, otherwise, with the modulating frequency content of in history should the highest modulating frequency of period overall communication success rate rewriting in concentrator and all terminals in the following period modulating frequency allocation list in should the period corresponding record, and they are set enable new period modulating frequency allocation list in the moment of following appointment.
Concentrator periodically to all terminals of its communication on clock carry out synchronously.
Compared with prior art, the present invention has following beneficial effect:
This communication system usually required a particular communication in the cycle, all terminals at least success communication once, the terminal of success communication will not mended communication in follow-up time.If can communicate a different modulating frequency of communication cycle inner conversion, then can effectively evade the noise jamming on some modulating frequency, significantly improve the communication success rate.
Description of drawings
Fig. 1 is the structured flowchart of power carrier communication system of the present invention.
Fig. 2 is the period modulating frequency allocation list example in the power carrier communication system of the present invention.
Fig. 3 carries out the flow chart that modulating frequency is selected according to period modulating frequency allocation list in the power carrier communication system of the present invention.
Fig. 4 is the flow chart of in the power carrier communication system of the present invention period modulating frequency allocation list regularly being optimized.
Embodiment
In order to further specify principle of the present invention and structure, existing by reference to the accompanying drawings to a preferred embodiment of the present invention will be described in detail.
The structure of power carrier communication system of the present invention as shown in Figure 1, comprises power carrier concentrator 1, a plurality of power carrier terminals 2 that link together with it and carry out carrier communication by power line, and the administrative center 3 that communicates to connect with concentrator 2.
The internal structure of concentrator 1 comprises microcontroller, clock, memory and carrier communication module etc., this carrier communication module comprises a plurality of switchable modulating frequencies, and preserve period modulating frequency allocation list in the memory, this period modulating frequency allocation list as shown in Figure 2, comprises a plurality of records, each record comprises the modulating frequency that beginning and ending time of period and this period adopt, wherein, this carrier communication module is supported F1, F2, three kinds of modulating frequencies of F3, is divided into seven periods in one day.
Similarly, the internal structure of terminal 2 also comprises microcontroller, clock, memory and carrier communication module etc., and this carrier communication module comprises a plurality of switchable modulating frequencies, and preserves period modulating frequency allocation list as shown in Figure 2 in the memory.
The distribution principle of period modulating frequency of the present invention: for each period distributes this period to disturb minimum modulating frequency.Maximum modulating frequency numbers that the time hop count of every day is supported more than or equal to carrier communication module.Each modulating frequency is distributed a period at least, disturbs relatively little modulating frequency to distribute the relatively long period.
Described communication success rate refers to that in a communication cycle success communication terminal 2 numbers once account for the percentage of total terminal 2 numbers at least.
So, a communication cycle is divided into the different time periods, and in the different time periods, adopting different communication modulating frequencies, communicating pair adopts identical modulating frequency in the same period, with the method for the overall communication success rate of raising system in one-period.
Described communication cycle refers to the time period of a regular length, such as: one day.
The concentrator 1 of described communication system and all terminals 2 can be managed the clock/calendar of oneself, and concentrator 1 clock of synchronous all terminals 2 automatically.
The period modulating frequency disposes two kinds of schemes in the power carrier communication system of the present invention:
Scheme one
Set unified period modulating frequency allocation list when 1) concentrator 1 and all terminals 2 are dispatched from the factory;
2) clock of concentrator synchronous all terminals 21 every day once;
When 3) scene was moved, the concentrator 1 in the system and all terminals 2 unified algorithms of following as shown in Figure 3 were to determine the carrier communication modulating frequency of current time employing.Wherein,
N represents one day period sum;
I: period sequence number, span: 0≤i＜N;
The concluding time of T (i) expression period i;
The carrier communication modulating frequency that F (i) expression period i adopts;
Fdef represents the carrier communication modulating frequency of system default;
T represents the current time in system;
F represents the modulating frequency of the current employing of system communication.
This mode, software algorithm is simple, can satisfy the requirement of most The field.
Scheme two
Set unified period modulating frequency allocation list when 1) concentrator 1 and all terminals 2 are dispatched from the factory;
2) clock of concentrator synchronous all terminals 21 every day once;
When 3) scene was moved, the concentrator 1 in the system and all terminals 2 unified algorithms of following in above-described embodiment one were determined the carrier communication modulating frequency that current time adopts;
4) the period modulating frequency allocation list of regular optimization system simultaneously.
This period modulating frequency is optimized algorithm, as shown in Figure 4, comprising:
1, the communication success rate of each current modulating frequency of period is added up and recorded to concentrator 1;
2, concentrator 1 and all terminals 2 check self time, in case reach modulating frequency allocation list switching time effective following period, then period in future modulating frequency allocation list is covered current period modulating frequency allocation list, and enable new period modulating frequency allocation list immediately.
If 3 since switching period modulating frequency allocation list time swt last time, spent three days, enter next step; Otherwise, return step 1;
4, for the communication minimum period of success rate, be designated as T (k), if the threshold values that its communication success rate is lower than setting (for example: 70%), then carry out next step; Otherwise, return step 1;
If 5 should also have original modulating frequency the period, for this period is selected an original modulating frequency, be designated as F (j); Otherwise, for this period is selected the highest modulating frequency of historical communication success rate in this period, be designated as F (x);
6, concentrator 1 upgrades the following period modulating frequency allocation list of self and the following period modulating frequency allocation list of all terminals 2, and the modulating frequency of only upgrading period T (k) is F (j) or F (x) (result who depends on step 5);
7, concentrator 1 self and all terminals 2 are set switching time of following period modulating frequency allocation list for a certain moment in the future, be designated as swt, return step 1.
This mode, all carrier equipments (concentrator 1 and all terminals 2) are supported current period modulating frequency allocation list and following period modulating frequency allocation list, and can constantly period in future modulating frequency allocation list be switched to current period modulating frequency allocation list in appointment.Set unified current and following period modulating frequency allocation list when equipment dispatches from the factory, the following period modulating frequency allocation list in the back of dispatching from the factory allows change, and can enable following period modulating frequency allocation list constantly in appointment.When the communication success rate of system does not reach when requiring, concentrator 1 study is automatically adjusted period modulating frequency allocative decision, and enables new modulating frequency allocative decision by said method, in the hope of improving the system communication success rate gradually.
The above only is preferable possible embodiments of the present invention, and unrestricted protection scope of the present invention, so the equivalent structure that all utilizations specification of the present invention and accompanying drawing content have been done changes, all is included in protection scope of the present invention.
Claims (1)
1. power-line carrier communication system, comprise the concentrator and at least one terminal that link together and carry out carrier communication by power line, include microcontroller on described concentrator and the terminal, clock, memory and carrier communication module, this carrier communication module comprises at least two kinds, switchable modulating frequency, it is characterized in that, all preserve period modulating frequency allocation list in the memory on described concentrator and the terminal, microcontroller on described concentrator and the terminal is by reading the information of described period modulating frequency allocation list, modulating frequency to described carrier communication module is selected, described period modulating frequency allocation list comprises a plurality of records, each record comprises the modulating frequency that beginning and ending time of period and this period adopt, all modulating frequencies of described carrier communication module occur once in described period modulating frequency allocation list at least, described concentrator is periodically added up the overall system communication success rate of each period, when the overall communication success rate that has at least one period is lower than the threshold values of setting, upgrade the following period modulating frequency allocation list of concentrator and all terminals, and require all terminals and concentrator from enabling new period modulating frequency allocation list in the moment of following appointment.
2
.Power-line carrier communication system as claimed in claim 1, it is characterized in that, when the microcontroller on described concentrator and the terminal arrives at following period modulating frequency allocation list switching instant, enabling following period modulating frequency allocation list is current period modulating frequency allocation list, and by reading the information of the period modulating frequency allocation list after the described renewal, the modulating frequency of described carrier communication module is selected.
3. power-line carrier communication system as claimed in claim 1 is characterized in that, when described concentrator is lower than the threshold values of setting in the overall communication success rate of a period, the modulating frequency that this period selects for use is adjusted according to strategy.
4. power-line carrier communication system as claimed in claim 3, it is characterized in that, the strategy that described concentrator is adjusted is, if there is previous original modulating frequency in the described period, select a previous original modulating frequency to rewrite modulating frequency content in the described period corresponding record of following period modulating frequency allocation list, otherwise, rewrite modulating frequency content in the described period corresponding record of period modulating frequency allocation list with the highest modulating frequency of described period overall communication success rate in history.
5. power-line carrier communication system as claimed in claim 4 is characterized in that, described concentrator periodically to all terminals of its communication on clock carry out synchronously.
6. power line carrier communication method, concentrator and at least one terminal are linked together and carry out carrier communication by power line, be provided with microcontroller at described concentrator and terminal, clock, memory and carrier communication module, make this carrier communication module have at least two kinds, switchable modulating frequency, it is characterized in that, all preserve period modulating frequency allocation list in the memory on described concentrator and terminal, make microcontroller on described concentrator and the terminal by reading the information of described period modulating frequency allocation list, come the modulating frequency of described carrier communication module is selected, described period modulating frequency allocation list comprises a plurality of records, each record comprises the modulating frequency that beginning and ending time of period and this period adopt, all modulating frequencies of described carrier communication module occur once in described period modulating frequency allocation list at least, described concentrator is periodically added up the overall system communication success rate of each period, when the overall communication success rate that has at least one period is lower than the threshold values of setting, upgrade the following period modulating frequency allocation list of concentrator and all terminals, and require all terminals and concentrator from enabling new period modulating frequency allocation list in the moment of following appointment.
7. power line carrier communication method as claimed in claim 6, it is characterized in that, when the microcontroller on described concentrator and the terminal arrives at following period modulating frequency allocation list switching instant, enabling following period modulating frequency allocation list is current period modulating frequency allocation list, and by reading the information of the period modulating frequency allocation list after the described renewal, the modulating frequency of described carrier communication module is selected.
8. power line carrier communication method as claimed in claim 6 is characterized in that, when described concentrator is lower than the threshold values of setting in the overall communication success rate of a period, the modulating frequency that this period selects for use is adjusted according to strategy.
9. power line carrier communication method as claimed in claim 8, it is characterized in that, the strategy that described concentrator is adjusted is, if there is previous original modulating frequency in the described period, select a previous original modulating frequency to rewrite modulating frequency content in the described period corresponding record of following period modulating frequency allocation list, otherwise, rewrite modulating frequency content in the described period corresponding record of period modulating frequency allocation list with the highest modulating frequency of described period overall communication success rate in history.
10. power line carrier communication method as claimed in claim 9 is characterized in that, described concentrator periodically to all terminals of its communication on clock carry out synchronously.
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| CN 200910151279 CN101944937B (en) | 2009-07-01 | 2009-07-01 | Power carrier communication system and method |
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| CN 200910151279 CN101944937B (en) | 2009-07-01 | 2009-07-01 | Power carrier communication system and method |
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| CN103607224B (en) * | 2013-12-02 | 2015-09-23 | 国家电网公司 | Set up the method for power-line carrier communication system two-way link |
| CN105490768B (en) * | 2015-11-18 | 2018-11-30 | 积成电子股份有限公司 | A kind of automatic calibrating method of concentrator clock chip |
| CN106781391A (en) * | 2016-12-29 | 2017-05-31 | 天津铁研智能技术有限公司 | A kind of remote wireless meter recording and transmission method |
| CN110400452A (en) * | 2019-08-07 | 2019-11-01 | 广州物道水务科技有限公司 | A kind of communication means, device and equipment |
| CN111490850B (en) * | 2020-03-09 | 2023-05-16 | 上海联虹技术有限公司 | Communication device data transmission control method, system, device and storage medium |
| CN114071253B (en) * | 2021-09-30 | 2023-11-07 | 宁波三星智能电气有限公司 | Method suitable for rapid networking pairing during networking module production |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006096987A1 (en) * | 2005-03-16 | 2006-09-21 | Domosys Corporation | System and method for power line communications |
| CN101217772A (en) * | 2008-01-02 | 2008-07-09 | 江苏省电力公司 | An optimization method for special network resources of 230MHz |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006096987A1 (en) * | 2005-03-16 | 2006-09-21 | Domosys Corporation | System and method for power line communications |
| CN101217772A (en) * | 2008-01-02 | 2008-07-09 | 江苏省电力公司 | An optimization method for special network resources of 230MHz |
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