CN103607224A - Method for building two-way link of power-line carrier communication system - Google Patents
Method for building two-way link of power-line carrier communication system Download PDFInfo
- Publication number
- CN103607224A CN103607224A CN201310632592.4A CN201310632592A CN103607224A CN 103607224 A CN103607224 A CN 103607224A CN 201310632592 A CN201310632592 A CN 201310632592A CN 103607224 A CN103607224 A CN 103607224A
- Authority
- CN
- China
- Prior art keywords
- frequency
- plc
- power
- signal
- way link
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention provides a method for building a two-way link of a power-line carrier communication system. The method comprises the following steps that I, the transmission information of PLC equipment is determined; II, time synchronization is built; III, candidate frequency is estimated; IV, the two-way link is built. The method is used for building the two-way link based on a frequency cognition technology, the work frequency selection range of a PLC system is expanded into thirty MHz from thirty KHz, both sides in communication can select the optimal communication frequency in a self-adaption mode according to respective channel conditions, and therefore the reliability of a PLC technology used for a smart power grid is enhanced.
Description
Technical field
The present invention relates to the method in a kind of power communication field, be specifically related to a kind of method of setting up power-line carrier communication system two-way link.
Background technology
Power line communication technology is that a kind of electric power cable that utilizes carrys out the communication mode of transmitting data information as communication medium.Conventional power line communication technology is on existing power circuit, and the high-frequency carrier signal loading through ovennodulation communicates, and therefore, power line communication is referred to as power line carrier communication (Power Line Communications, PLC) conventionally.According to the electric pressure of carrier communication circuit, PLC technology generally comprises: the high-tension electricity line carrier communication using the ultra-high-tension power transmission line of 35kV and above as communication medium, medium voltage electricity line carrier communication using the middle pressure transmission line of 10kV electric pressure as communication medium, and the low-voltage powerline carrier communication using the low-voltage electricity transmission line of 380/220V electric pressure as communication medium.
At present, conventional PLC technology is set up two-way link and is all adopted fixedly frequency communication mode between point-to-point, its operating frequency is just determined conventionally before carrier module dispatches from the factory, cannot carry out self adaptation adjustment according to actual power line carrier channel situation and variation thereof, thereby caused to a certain extent frequency adaptability poor, reliability cannot meet the communication requirement of business.
Therefore, the method for building up of the power-line carrier communication system two-way link that a kind of reliability is high, flexibility is high need to be provided.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the invention provides a kind of method of setting up power-line carrier communication system two-way link based on frequency cognitive techniques, the method is set up two-way link based on frequency cognitive techniques, the operating frequency range of choice of PLC system can be expanded to from 30 KHz to three ten megahertzes, the both sides that participation is communicated by letter can be according to channel conditions separately, select adaptively best communication frequency, thereby strengthen the reliability for the PLC technology of intelligent grid.
In order to realize foregoing invention object, the present invention takes following technical scheme:
Based on frequency cognitive techniques, set up a method for power-line carrier communication system two-way link, its improvements are: said method comprising the steps of:
I, determine the transmission information of PLC equipment; II, time synchronized are set up; III, Candidate Frequency are estimated; IV, two-way link are set up.
Further, described method is the power-line carrier communication system two-way link method for building up for 30 KHz to three ten mhz frequencies scopes;
Under point to point half duplex communication pattern, PLC equipment sent, received signal bandwidth, modulation system at corresponding Candidate Frequency place are consistent, according to the operating frequency of the adaptively selected the best of power line channel situation.
Further, described step I comprises: the side signal transmission of determining PLC equipment sends, receives the basic slot length T of signal to, Candidate Frequency set and PLC equipment.
Further, described Candidate Frequency set comprises N frequency, 1 < N≤5.
Further, described Step II comprises: the PLC device A of described carrier telecommunication, according to time slot T, is carried out in Candidate Frequency cocycle and sent, receives signal;
The PLC equipment B of described carrier telecommunication receives signal, 1 < N≤5 according to the time interval (2N+1) T in Candidate Frequency cocycle.
Further, described Step II I comprises:
After PLC device A and PLC equipment B synchronized relation settling time, described PLC device A continues circulation and carries out transmission, receives signal;
PLC equipment B is carried out and is sent, receives signal according to time slot T circulation contrary to described PLC device A.
Further, described step IV comprises the following steps:
S401, process Candidate Frequency estimation stages, PLC equipment B is sent to PLC device A by the signal that carries forward link communication frequency;
S402, next time slot T, described PLC device A switching frequency, is sent to PLC equipment B with forward link communication frequency by the signal that carries reverse link communication frequency;
S403, described PLC equipment B obtain reverse link communication frequency;
S405, at next time slot T, described PLC equipment B sends confirmation signal to described PLC device A with reverse link communication frequency, described PLC device A is with reverse link communication frequency confirmation of receipt signal;
S406, the link establishment of PLC system bidirectional.
Further, use two PLC equipment of described method to select in 30 KHz to three hundred kilohertz range in the bandwidth of the transmission of corresponding Candidate Frequency place, reception signal;
Use two PLC equipment of described method within the scope of 90 milliseconds, to select at one millisecond at the basic slot length of the transmission of corresponding Candidate Frequency place, reception signal.
Further, in described method, the modulation system of selecting comprises one or more in narrowband modulation, spread spectrum or OFDM.
Further, the assessment of described Candidate Frequency is adopted repeatedly and received, and according to the statistical analysis technique of each snr computation average received signal to noise ratio receiving, the frequency of average received signal to noise ratio maximum is defined as to the optimum traffic frequency of link, and average time is no more than 5 times.
Compared with prior art, beneficial effect of the present invention is:
1, method of the present invention is set up the two-way link of power-line carrier communication system based on frequency cognitive techniques, break through conventional powerline carrier communication system and depended on the fixedly communication pattern of frequency, the range of choice of PLC operating frequency is expanded to from 30 KHz to three ten megahertzes, make the variation that PLC system can adaptive electro line of force carrier channel environment, improved flexibility that carrier communication frequency selects and the reliability of system.
2, method of the present invention is by a Candidate Frequency set of certain scale of agreement in advance between the Correspondent Node of point-to-point, can avoid artificially the responsive frequency ranges such as radio broadcasting, aviation radio, the interference of avoiding PLC system to cause radio traffic.
3, method of the present invention in advance Candidate Frequency set of agreement between the Correspondent Node of point-to-point can be selected frequency targetedly according to the concrete scene (as line voltage distribution grade, communication distance, business demand etc.) of PLC technology application, gives full play to arrowband, broadband frequency range advantage separately in plc communication.
4, the Candidate Frequency estimation stages of method of the present invention can be according to the average received signal to noise ratio on each frequency, from the statistical significance system, obtain all sidedly the channel condition information of point-to-point two-way link, for PLC system self-adaption is selected good working frequency range, the reliability that improves communication lays the foundation.
5, method of the present invention can expand under PLC network environment, makes every section of link all can adaptively selected frequency optimum traffic, meets the requirement of intelligent grid business to communication reliability.
Accompanying drawing explanation
Fig. 1 is the power-line carrier communication system schematic diagram of point-to-point;
Fig. 2 is the time synchronized establishment stage schematic diagram in the cognitive implementing procedure of frequency;
Fig. 3 is the Candidate Frequency estimation stages schematic diagram in the cognitive implementing procedure of frequency;
Fig. 4 is the two-way link establishment stage schematic diagram in the cognitive implementing procedure of frequency;
Fig. 5 is the PLC system bidirectional link establishment flow chart based on frequency cognitive techniques.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the power-line carrier communication system schematic diagram that Fig. 1 is point-to-point; Power-line carrier communication system is comprised of carrier telecommunication (carrier transreceiver) and power line channel two parts.Carrier telecommunication is responsible for coupling and the extraction of high-frequency carrier signal on power line, and power line channel is by the electric power networks that comprises many power circuits and various electric power facility, power consumption equipment and form.Although actual PLC network configuration is comparatively complicated, two adjacent carrier communication equipments all can be regarded the topological structure of point-to-point as, and wherein a carrier communication equipment is PLC device A, and an other carrier communication equipment is PLC equipment B.Two PLC carrier communication equipments connect by power line channel.
A kind of method of setting up power-line carrier communication system two-way link provided by the invention, comprises the following steps:
Step 1, determine the transmission information of PLC equipment.
The method adopts point to point half duplex communication pattern; PLC equipment wherein sent, received signal bandwidth, modulation system at corresponding Candidate Frequency place are consistent, and have realized PLC equipment according to the operating frequency of the adaptively selected the best of power line channel situation.The method is applicable to the power-line carrier communication system two-way link method for building up of 30 KHz to three ten mhz frequencies scopes.The side signal transmission of determining PLC equipment sends, receives the basic slot length T of signal to, Candidate Frequency set and PLC equipment.
Candidate Frequency set comprises N frequency, 1 < N≤5.
Step 2, the synchronous establishment stage of entry time.
Carrier telecommunication comprises PLC device A and PLC equipment B.PLC device A, according to time slot T, is carried out in Candidate Frequency cocycle and is sent, receives signal; PLC equipment B receives signal, 1 < N≤5 according to the time interval (2N+1) T in Candidate Frequency cocycle.
Step 3, enter Candidate Frequency estimation stages.
After PLC device A and PLC equipment B synchronized relation settling time, PLC device A continues circulation and carries out transmission, receives signal;
PLC equipment B is carried out and is sent, receives signal according to time slot T circulation contrary to PLC device A;
PLC device A and PLC equipment B are determined the optimum traffic frequency of two-way link according to the average received signal to noise ratio on each comfortable each frequency.
Step 4, enter two-way link establishment stage.
Through Candidate Frequency estimation stages, PLC equipment B is sent to PLC device A by the signal that carries forward link communication frequency; Next time slot T, PLC device A switching frequency, is sent to PLC equipment B with forward link communication frequency by the signal that carries reverse link communication frequency; PLC equipment B obtains reverse link communication frequency; At next time slot T, PLC equipment B sends confirmation signal to PLC device A with reverse link communication frequency, and PLC device A is with reverse link communication frequency confirmation of receipt signal; The link establishment of PLC system bidirectional.
Use said method of the present invention, two PLC equipment are selected in tens KHz in the bandwidth of the transmission of corresponding Candidate Frequency place, reception signal in hundreds of kilohertz range, are specifically as follows 30 KHz to three hundred KHz; Two PLC equipment are selected at several milliseconds at the basic slot length of the transmission of corresponding Candidate Frequency place, reception signal within a few tens of milliseconds, are specifically as follows one millisecond to 90 milliseconds.
In conjunction with specific embodiments and accompanying drawing describe, method of the present invention comprises the following steps:
Step 1, determine the transmission information of PLC equipment.
In the present embodiment, set PLC device A to the side signal transmission of PLC equipment B to being forward, otherwise be reverse; Two carrier communication equipments all use half-duplex mode to communicate; 3 frequencies of Candidate Frequency set-inclusion of two carrier communication equipments, are respectively f
1, f
2and f
3; Two carrier communication equipments send, receive the bandwidth of signal at corresponding Candidate Frequency place, and modulation system etc. must be consistent; The basic slot length that two carrier communication equipments sent, received signal is T.
Step 2, the synchronous establishment stage of entry time.
PLC device A is at the linked network initial stage, first according to time slot T, in order one by one at f
1, f
2and f
3in frequency, carry out the operation that sends, receives signal, the time through 6T completes once traversal.This process will loop, and be called " 6T " mode of operation.
PLC equipment B is at the linked network initial stage, first according to time interval 7T, in order one by one at f
1, f
2and f
3in frequency, carry out the operation that receives signal, the time through 21T completes once traversal.This process will loop, and be called " 21T " mode of operation.
As shown in Figure 2, Fig. 2 is the time synchronized establishment stage schematic diagram in the cognitive implementing procedure of frequency; Because the cycle period of two carrier communication equipments is inconsistent, and the time of reception 7T of PLC equipment B in 1 frequency is greater than transmission, the reception cycle period 6T of PLC device A in 3 frequencies, therefore guaranteed through the regular hour, PLC equipment B can receive the signal that PLC device A sends.Once receive signal, two carrier communication equipments set up time synchronizing relation.Suppose that in the present embodiment first PLC equipment B is in frequency f
1on receive the signal that PLC device A sends.
Step 3, enter Candidate Frequency estimation stages.
Two carrier communication equipments are set up after time synchronizing relation, and PLC device A still keeps its " 6T " mode of operation constant, and PLC equipment B is switched to " 6T " mode of operation from " 21T " mode of operation.Difference is, the transmission of PLC equipment B, receives the just in time contrary of signal slot order and PLC device A.
For guaranteeing Candidate Frequency estimation stages, can carry out system, comprehensively assessment to selectable Candidate Frequency, the selection of stipulating in the present embodiment forward and reverse link frequencies all adopts affirmation mechanism 3 times, i.e. two carrier communication equipments reception that all has three tries on 3 Candidate Frequencies, pass through again the time of " 17T ", PLC device A and PLC equipment B are determined the optimum traffic frequency of two-way link according to the average received signal to noise ratio (Signal to Noise Ratio, SNR) on each comfortable each frequency.As shown in Figure 3, Fig. 3 is the Candidate Frequency estimation stages schematic diagram in the cognitive implementing procedure of frequency.
Step 4, two-way link establishment stage.
As shown in Figure 4, Fig. 4 is the two-way link establishment stage schematic diagram in the cognitive implementing procedure of frequency; Through Candidate Frequency estimation stages, enter two-way link establishment stage.When PLC equipment B is determined forward link communication frequency f
justafter, this frequency information is fed back to PLC device A; When PLC device A is determined reverse link communication frequency f
insteadafter, this frequency information is fed back to PLC equipment B.
Two-way link establishment stage, by PLC equipment B by f
justfeed back to PLC device A, PLC device A is in frequency f
insteadupper reception signal, does not still know reverse link communication frequency due to PLC equipment B now, and it still continues to use frequency polling mode, from next time slot T, from frequency f
1start to attempt sending to carry forward link frequency information f
justsignal to PLC device A, interting therebetween with time slot T in frequency f
justupper reception signal.
Suppose in the present embodiment f
instead=f
2, when PLC equipment B is carried out with frequency f
2forward link frequency information f is carried in transmission
justsignal during to PLC device A, the latter can obtain forward link frequency information.At next time slot T, PLC device A is switched to frequency f
justreverse link frequencies information f is carried in transmission
insteadsignal to PLC equipment B, latter is just in time in frequency f
juston receive, thereby obtain reverse link communication frequency.
PLC equipment B knows after reverse link communication frequency, at next time slot T with frequency f
insteadsend confirmation signal ACK to PLC device A, latter is with frequency f
insteadconfirmation of receipt signal.Based on frequency cognitive techniques, the link establishment of PLC system bidirectional.
As shown in Figure 5, Fig. 5 is the PLC system bidirectional link establishment flow chart based on frequency cognitive techniques; According to the order of time synchronized establishment stage, Candidate Frequency estimation stages, two-way link establishment stage, PLC device A and PLC equipment B are determined respectively best forward, reverse link communication frequency within the scope of Candidate Frequency, and set up reliable connection.Meanwhile, this frequency cognitive process can start according to the period of change of voltage Power Line Carrier Channel characteristic, with the optimum traffic frequency of the two-way link that upgrades in time, improve PLC technology reliability and to time become the adaptability of carrier channel.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present invention, and do not depart from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. a method of setting up power-line carrier communication system two-way link, is characterized in that: said method comprising the steps of:
I, determine the transmission information of PLC equipment; II, time synchronized are set up; III, Candidate Frequency are estimated; IV, two-way link are set up.
2. a kind of method of setting up power-line carrier communication system two-way link as claimed in claim 1, is characterized in that: described method is the power-line carrier communication system two-way link method for building up for 30 KHz to three ten mhz frequencies scopes;
Under point to point half duplex communication pattern, PLC equipment sent, received signal bandwidth, modulation system at corresponding Candidate Frequency place are consistent, according to the operating frequency of the adaptively selected the best of power line channel situation.
3. a kind of method of setting up power-line carrier communication system two-way link as claimed in claim 1, is characterized in that: described step I comprises: the side signal transmission of determining PLC equipment sends, receives the basic slot length T of signal to, Candidate Frequency set and PLC equipment.
4. a kind of method of setting up power-line carrier communication system two-way link as claimed in claim 3, is characterized in that: described Candidate Frequency set comprises N frequency 1 < N≤5.
5. a kind of method of setting up power-line carrier communication system two-way link as claimed in claim 1, it is characterized in that: described Step II comprises: the PLC device A of described carrier telecommunication, according to time slot T, is carried out in Candidate Frequency cocycle and sent, receives signal;
The PLC equipment B of described carrier telecommunication receives signal, 1 < N≤5 according to the time interval (2N+1) T in Candidate Frequency cocycle.
6. a kind of method of setting up power-line carrier communication system two-way link as claimed in claim 1, is characterized in that: described Step II I comprises:
After PLC device A and PLC equipment B synchronized relation settling time, described PLC device A continues circulation and carries out transmission, receives signal;
PLC equipment B is carried out and is sent, receives signal according to time slot T circulation contrary to described PLC device A.
7. a kind of method of setting up power-line carrier communication system two-way link as claimed in claim 1, is characterized in that: described step IV comprises the following steps:
S401, process Candidate Frequency estimation stages, PLC equipment B is sent to PLC device A by the signal that carries forward link communication frequency;
S402, next time slot T, described PLC device A switching frequency, is sent to PLC equipment B with forward link communication frequency by the signal that carries reverse link communication frequency;
S403, described PLC equipment B obtain reverse link communication frequency;
S404, at next time slot T, described PLC equipment B sends confirmation signal to described PLC device A with reverse link communication frequency, described PLC device A is with reverse link communication frequency confirmation of receipt signal;
S405, the link establishment of PLC system bidirectional.
8. a kind of method of setting up power-line carrier communication system two-way link as claimed in claim 1, is characterized in that: use two PLC equipment of described method to select in three KHz to three hundred kilohertz range in the bandwidth of the transmission of corresponding Candidate Frequency place, reception signal;
Use two PLC equipment of described method within the scope of 90 milliseconds, to select at one millisecond at the basic slot length of the transmission of corresponding Candidate Frequency place, reception signal.
9. a kind of method of setting up power-line carrier communication system two-way link as claimed in claim 1, is characterized in that: in described method, the modulation system of selecting comprises one or more in narrowband modulation, spread spectrum or OFDM.
10. a kind of method of setting up power-line carrier communication system two-way link as claimed in claim 4, it is characterized in that: the assessment of described Candidate Frequency is adopted repeatedly and received, and the statistical analysis technique of the each snr computation average received signal to noise ratio receiving of foundation, the frequency of average received signal to noise ratio maximum is defined as to the optimum traffic frequency of link, and average time is no more than 5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310632592.4A CN103607224B (en) | 2013-12-02 | 2013-12-02 | Set up the method for power-line carrier communication system two-way link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310632592.4A CN103607224B (en) | 2013-12-02 | 2013-12-02 | Set up the method for power-line carrier communication system two-way link |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103607224A true CN103607224A (en) | 2014-02-26 |
| CN103607224B CN103607224B (en) | 2015-09-23 |
Family
ID=50125427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310632592.4A Active CN103607224B (en) | 2013-12-02 | 2013-12-02 | Set up the method for power-line carrier communication system two-way link |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103607224B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104144002A (en) * | 2014-08-18 | 2014-11-12 | 国家电网公司 | Multi-frequency flooding power line carrier communication method |
| WO2017000708A1 (en) * | 2015-06-29 | 2017-01-05 | 全球能源互联网研究院 | Cross-band power line frequency recognition method based on fine frequency granularity |
| CN108696296A (en) * | 2017-04-10 | 2018-10-23 | 华为技术有限公司 | The method and point of termination station of Frequency Band Selection |
| CN108880619A (en) * | 2018-07-26 | 2018-11-23 | 航天亮丽电气有限责任公司 | A kind of automatic meter reading method using bandwidth carrier communication module |
| CN109818780A (en) * | 2018-12-28 | 2019-05-28 | 江苏驷源电力有限公司 | A kind of low pressure broadband power line carrier communication unit and network-building method |
| CN112787688A (en) * | 2020-12-31 | 2021-05-11 | 广东电网有限责任公司电力调度控制中心 | Multicast tree node communication method and device |
| CN115412128A (en) * | 2022-08-23 | 2022-11-29 | 青岛鼎信通讯股份有限公司 | Medium-voltage carrier networking communication scheme based on signal-to-noise ratio |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007026413A1 (en) * | 2005-08-31 | 2007-03-08 | Mitsubishi Denki Kabushiki Kaisha | Power line carrier communication modem |
| CN201435729Y (en) * | 2009-04-08 | 2010-03-31 | 南京信息职业技术学院 | Modem for carrier communication of low-voltage power line |
| CN101944937A (en) * | 2009-07-01 | 2011-01-12 | 深圳长城开发科技股份有限公司 | Power carrier communication system and method |
| CN102427376A (en) * | 2011-12-09 | 2012-04-25 | 上海翊昊微电子有限公司 | Power line carrier communication system and method |
| CN102571654A (en) * | 2011-12-31 | 2012-07-11 | 上海贝岭股份有限公司 | Multi-carrier frequency self-adaptive power line communication system and method |
| CN103384964A (en) * | 2012-02-17 | 2013-11-06 | 三菱电机株式会社 | Power conversion device, and power conversion system |
| CN103607222A (en) * | 2013-11-27 | 2014-02-26 | 国家电网公司 | Self-learning method for cross-frequency-band power line communication frequency |
-
2013
- 2013-12-02 CN CN201310632592.4A patent/CN103607224B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007026413A1 (en) * | 2005-08-31 | 2007-03-08 | Mitsubishi Denki Kabushiki Kaisha | Power line carrier communication modem |
| CN201435729Y (en) * | 2009-04-08 | 2010-03-31 | 南京信息职业技术学院 | Modem for carrier communication of low-voltage power line |
| CN101944937A (en) * | 2009-07-01 | 2011-01-12 | 深圳长城开发科技股份有限公司 | Power carrier communication system and method |
| CN102427376A (en) * | 2011-12-09 | 2012-04-25 | 上海翊昊微电子有限公司 | Power line carrier communication system and method |
| CN102571654A (en) * | 2011-12-31 | 2012-07-11 | 上海贝岭股份有限公司 | Multi-carrier frequency self-adaptive power line communication system and method |
| CN103384964A (en) * | 2012-02-17 | 2013-11-06 | 三菱电机株式会社 | Power conversion device, and power conversion system |
| CN103607222A (en) * | 2013-11-27 | 2014-02-26 | 国家电网公司 | Self-learning method for cross-frequency-band power line communication frequency |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104144002A (en) * | 2014-08-18 | 2014-11-12 | 国家电网公司 | Multi-frequency flooding power line carrier communication method |
| WO2017000708A1 (en) * | 2015-06-29 | 2017-01-05 | 全球能源互联网研究院 | Cross-band power line frequency recognition method based on fine frequency granularity |
| CN108696296A (en) * | 2017-04-10 | 2018-10-23 | 华为技术有限公司 | The method and point of termination station of Frequency Band Selection |
| CN112332888A (en) * | 2017-04-10 | 2021-02-05 | 华为技术有限公司 | Frequency band selection method and terminal station |
| CN112332888B (en) * | 2017-04-10 | 2021-10-26 | 华为技术有限公司 | Frequency band selection method and terminal station |
| CN108880619A (en) * | 2018-07-26 | 2018-11-23 | 航天亮丽电气有限责任公司 | A kind of automatic meter reading method using bandwidth carrier communication module |
| CN109818780A (en) * | 2018-12-28 | 2019-05-28 | 江苏驷源电力有限公司 | A kind of low pressure broadband power line carrier communication unit and network-building method |
| CN109818780B (en) * | 2018-12-28 | 2022-02-11 | 江苏驷源电力有限公司 | Low-voltage broadband power line carrier communication unit and networking method |
| CN112787688A (en) * | 2020-12-31 | 2021-05-11 | 广东电网有限责任公司电力调度控制中心 | Multicast tree node communication method and device |
| CN115412128A (en) * | 2022-08-23 | 2022-11-29 | 青岛鼎信通讯股份有限公司 | Medium-voltage carrier networking communication scheme based on signal-to-noise ratio |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103607224B (en) | 2015-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103607224B (en) | Set up the method for power-line carrier communication system two-way link | |
| CN109687891B (en) | Carrier region identification method based on broadband power line | |
| US9219526B2 (en) | Channel selection in power line communications | |
| CN103457636B (en) | Method and system for cross-frequency band power line carrier communication based on frequency recognition technology | |
| US8861485B2 (en) | Self-organizing communications network and method for the operation thereof | |
| CN104301984A (en) | Power control method based on time domain half-duplex relay in D2D cellular network | |
| CN103607222B (en) | A kind of self-learning method across frequency band power line communication frequency | |
| CN104486012A (en) | Environment frequency detection and automatic frequency hopping system and method | |
| US20130070790A1 (en) | Superframe format for mv-lv communication in multi tone-mask plc networks | |
| CN116782304B (en) | Multi-channel communication equipment and method | |
| CN103731249B (en) | Digital communication method and device for improving intelligent power grid communication reliability | |
| CN103078402B (en) | High-voltage cable partial-discharge quantity-of-state networking measurement time precise synchronizing method | |
| CN107682047B (en) | Channel-aware medium-voltage power line communication data transmission method | |
| CN103096447B (en) | Mobile device, base station, Direct Communication system and Poewr control method thereof | |
| CN108696300B (en) | Power line communication device and method | |
| US9866273B2 (en) | Apparatus and method for accessing network | |
| CN105636022A (en) | RSSI-based low-power consumption passive wireless node networking method | |
| CN108667536B (en) | Test method and device for analog signal communication system | |
| CN111163292A (en) | Monitoring information processing method based on ad hoc network communication | |
| CN111565402A (en) | Communication training system and training method for wireless communication | |
| CN113316137A (en) | Multi-frequency redundancy wireless transmission method and device based on TDMA | |
| CN101771461A (en) | Method, device and system for keeping signal synchronization in TD-SCDMA system | |
| CN217769506U (en) | Quasi-synchronization grid-connected system of generator set | |
| CN101282172A (en) | Method for automatically generating frequency library of shortwave frequency hopping | |
| CN214479630U (en) | Centralized voltage control device of active power distribution network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160429 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Patentee after: State Grid Smart Grid Institute Patentee after: State Grid Hebei Electric Power Company Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee before: State Grid Corporation of China Patentee before: China Electric Power Research Institute Patentee before: State Grid Hebei Electric Power Company |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Patentee after: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE Patentee after: State Grid Hebei Electric Power Company Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee before: State Grid Corporation of China Patentee before: China Electric Power Research Institute Patentee before: State Grid Smart Grid Institute Patentee before: State Grid Hebei Electric Power Company |