CN103763764B - Data transmission method for electric transmission line wireless communication based on automatic power increasing retransmission mechanism - Google Patents
Data transmission method for electric transmission line wireless communication based on automatic power increasing retransmission mechanism Download PDFInfo
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Abstract
A data transmission method for electric transmission line wireless communication based on an automatic power increasing retransmission mechanism comprises the following steps that firstly, initial parameters are set, sensors are set to collect data one time every other Tc minutes and upload the data to a central node, and the sensors take turns to work circularly; a power increasing coefficient alpha1, a power increasing coefficient alpha 2 and a power increasing coefficient alpha 3 are set, wherein 0<alpha1<alpha 2< alpha 3<1, and the sensor transmitting power maximum value is Pmax; secondly, the communication establishing process of the sensor S1 and the central node comprises the steps that 2.1, when the S1 uploads the data to the central node, the automatic power increasing retransmission mechanism is adopted; 2.2, the communication establishing processes of the sensor S2, the sensor S3,...and the sensor Sn and the central node is like the establishing process of the first step. According to the data transmission method, the reliability can be improved, and the fluency can be enhanced.
Description
Technical field
The present invention relates to the data transmission method of a kind of transmission line of electricity radio communication.
Background technology
The data transmission system framework of transmission line of electricity radio communication has been divided into three parts: sensor, Centroid, backstage.
Wire pole tower is arranged upper typically all based on line style in actual applications.On every power transmission line of each shaft tower
It is placed with sensor, shaft tower is also equipped with Centroid.Distance between two shaft towers is typically between 100～200 meters.No
Lose generality, it is assumed that any two shaft tower spacing are dgRice；The most continuous 5 shaft towers A, B, C, D, E are respectively at a distance of dg, as it is shown in figure 1,
Spacing d between towergFor 200m.This patent uses the wireless communication module launching power adjustable, its peak power PmaxThe most permissible
Covering radius is 2.5dgThe scope of rice；It is to say, a sensor at most can click on 5 adjacent centromeres simultaneously
Row communication.
Without loss of generality it is assumed that the Centroid C on shaft tower C and 5 sensor S1、S2、S3、S4、S5Between topology
Structure, as shown in Figure 2.In actual applications, any number of sensor can use such structure.Any one sensing
Device is only and Centroid all passes through radio communication, such as ZigBee etc., is attached, constitutes wireless Internet of Things.Thus medium access
Control method is simple, and communications protocol is the simplest, it is easy to the monitoring of network and management.Secondly, Centroid is to connection line
Can isolate one by one and carry out fault detect and location, the fault of single point of attachment only affects an equipment, does not interferes with the whole network.
Summary of the invention
In order to the reliability overcoming the data transmission method of existing transmission line of electricity radio communication is poor, fluency is poor not
Foot, the invention provides a kind of transmission line of electricity increasing retransmission mechanism based on automated power improving reliability, lifting fluency
The data transmission method of radio communication.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of data transmission method of the transmission line of electricity radio communication increasing retransmission mechanism based on automated power, described data
Transmission method comprises the following steps:
1) Initial parameter sets:
The sensor S that shaft tower C closes on1Every TcMinute gather a secondary data upload to Centroid, each sensor it
Between use the working method circulated the most in turn；
If any two shaft tower spacing are dgRice, uses the wireless communication module launching power adjustable, its peak power PmaxExtremely
Less can be with covering radius as 2.5dgThe scope of rice；It is to say, sensor at most can simultaneously and adjacent 5 centers
Node communicates；
Setting power enhancement coefficient α1、α2、α3, and 0 < α1<α2<α3<1；Sensor emission power maximum is Pmax, then,
Power α1PmaxMake sensor S1With immediate Centroid communication, but other center closed on will not be covered
Node；
Power α2PmaxMake sensor S1With apart less than 1.5dg3 Centroids of rice communicate；
Similarly, power α3PmaxMake sensor S1 and at a distance of less than 2.5dg5 Centroids of rice communicate,
But the Centroid on farther shaft tower can not receive this signal；
2) sensor S1To set up communication process as follows with Centroid:
2.1) S is worked as1When uploading the data to Centroid,
2.1.1) S1With power α1PmaxWith at a distance of nearest Centroid C, carry out trial of shaking hands；If shaking hands successfully, that
Data communication is carried out according to the time slot of reservation in the follow-up time；
2.1.2) if it fails, S1Improve and launch power to α2Pmax, with apart less than 1.5dgCentroid, enter
Capable trial of shaking hands, if shaking hands successfully with any one Centroid, then enters according to the time slot of reservation in the follow-up time
Row data communication；
2.1.3) otherwise, S1 improves transmitting power again to α3Pmax, with apart less than 2.5dgCentroid, according to
Anticollision booking-mechanism carries out three-way handshake trial, if shaking hands successfully with any one Centroid, then when follow-up
Data communication is carried out according to the time slot of reservation between；
2.1.4) if can't shake hands successfully, then this time communication is attempted unsuccessfully；
2.2) the rest may be inferred, sensor S2、S3、....SnWith the course synchronization rapid 2.1 that Centroid sets up communication connection).
Further, described step 2), if sensor is at TqAnticipated acknowledgement frame is not received, the most preliminary judgement in time
Corresponding Centroid breaks down.
Described step 2) in, when sensor is with power α2PmaxOr α3PmaxAfter sending handshake request: if receiving only one
When the confirmation of Centroid is successfully preengage, then sensor is only attached with this Centroid, row data communication of going forward side by side；If
When receiving the acknowledgement frame of multiple Centroid, then the foundation the earliest of the timestamp on acknowledgement frame is selected to connect, line number of going forward side by side
According to communication.
Further, described step 2.1) in, handshake procedure is divided into four steps:
1. sensor sends claim frame by controlling channel to Centroid, detects whether to lead to Centroid
Letter, and preengage the data slot of free time.
2. Centroid is after receiving the claim frame of sensor, sends an acknowledgement frame immediately, is distributed by data slot
Result notice sensor.
If 3. sensor has been assigned to a data slot, just sends a frame and confirm the communication with Centroid；
Otherwise, sensor just sends this of a frame end and Centroid and communicates, and after waiting a random delay, again attempts to hold
Hands.
If 4. sensor confirms to set up connection, then, after Centroid receives this acknowledgement frame, just in agreement
Good data slot starts to carry out data communication with this sensor.
In handshake procedure, if Centroid receives the request of multiple sensor at short notice, please according to receiving
Seek the priority of frame, according to arriving first the principle first obtained, free timeslot is distributed to corresponding sensor；If free timeslot distributes
Complete, then notify that remaining center sensor node is the busiest, these sensors will send request after one section of random delay again
Frame.
If sensor is at a TqTime delay after do not receive the confirmation of Centroid, the most again send request, wherein, Tq
RTT (Round Trip Time, two-way time) not less than sensor to Centroid.
The technology of the present invention is contemplated that: in whole communication process, sensor gathers data the pattern uploaded successively, not only
Sensor is allowed to have obtained sufficient rest, it is ensured that the reduction of accumulator electric-quantity loss.And, also ensure the stream of network service
Smooth property, also slow down Centroid simultaneously and processes the pressure of data, can give efficient, timely, timesaving to the work on backstage and prop up
Hold.
Beneficial effects of the present invention is mainly manifested in: 1, increases power autonomous retransmission Frame and ensure that having of Frame
Imitate, transmit reliably；2, when in network, one or several Centroid breaks down when, sensor still can be by data
Send in time.Bust this will not be caused because of one or several Centroid fault of minority, substantially increase the reliable of network
Property and fault-tolerant ability；3, first by small-power, reattempt relatively high power and carry out transmitting data frame and can reduce the loss of battery, reach
The purpose of power saving；4, the Centroid broken down can be detected, improve the ability of detection automatic to network failure, effectively drop
Low maintenance cost；5, ensure that the transmission of the data between sensor energy and Centroid does not collides；6, reasonable distribution
Data transmission channel uses, and does not abuses, the most at will takies the communication channel carrying out information transmission.Make doing between sensor
Disturb and reduce as far as possible, it is ensured that the normal work between each node, make the operation that network energy is good；7, it is not take up sensor to retransmit
The time of mechanism, make it there is more efficient channel utilization.8, the use of channel is controlled, it is ensured that communication process reliable
Property, significantly lower the possibility that each sensor collides between frame and frame in reservation process, make whole communication can have bar
Manage interference-free carrying out.
Accompanying drawing explanation
Fig. 1 is whole transmission line of electricity system architecture illustraton of model.
Fig. 2 is the attachment structure figure of Centroid and sensor.
Fig. 3 is the flow chart that automated power increases retransmission mechanism.
Fig. 4 is the communication process figure between sensor and Centroid.
Fig. 5 is that sensor sets up, with Centroid, the flow chart being connected.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
With reference to Fig. 1～Fig. 5, the data transmission of a kind of transmission line of electricity radio communication increasing retransmission mechanism based on automated power
Method, described data transmission method comprises the following steps:
1) Initial parameter sets:
Set a sensor S1Every TcMinute gather a secondary data upload to Centroid 1, each sensor 2 it
Between use the working method circulated the most in turn；
Assume that any two shaft tower spacing are dgRice, uses the wireless communication module launching power adjustable, its peak power Pmax
At least can be with covering radius as 2.5dgThe scope of rice；It is to say, sensor 2 at most can be simultaneously and in adjacent 5
Heart node communicates；
Centroid 1 is carried out by control channel and data channel with communicating of sensor 2.Wherein, control channel to be responsible for
Control the transmission of signaling, such as handshake procedure；Data channel is responsible for transmitting data.
The Centroid d apart that each two is adjacentgRice.
Setting power enhancement coefficient α1、α2、α3, and 0 < α1<α2<α3<1；Sensor emission power maximum is Pmax, then,
Power α1PmaxMake sensor S1With immediate Centroid C communication, but will not cover close on other in
Heart node；
Power α2PmaxMake sensor S1With apart less than 1.5dg3 Centroids C, B, D of rice communicate；
Similarly, power α3PmaxMake sensor S1With apart less than 2.5dg5 Centroids C, B, D, A, E of rice
Communicate, but the Centroid on farther shaft tower can not receive this signal；
2) sensor S1To set up communication process as follows with Centroid:
2.1) S is worked as1When uploading the data to Centroid,
2.1.1) S1With power α1PmaxWith at a distance of nearest Centroid, carry out trial of shaking hands；If shaking hands successfully, then
Data communication is carried out according to the time slot of reservation in the follow-up time；
2.1.2) if it fails, S1Improve and launch power to α2Pmax, with apart less than 1.5dgCentroid C, B, D,
Carry out trial of shaking hands, if shaking hands successfully with any one Centroid, then according to the time slot of reservation in the follow-up time
Carry out data communication；
2.1.3) otherwise, S1Again improve and launch power to α3Pmax, with apart less than 2.5dgCentroid C, B, D, A,
E, carries out three-way handshake trial according to anticollision booking-mechanism, if shaking hands successfully with any one Centroid, then rear
Data communication is carried out according to the time slot of reservation in the continuous time；
2.1.4) if can't shake hands successfully, then this time communication is attempted unsuccessfully；
2.2) the rest may be inferred, sensor S2、S3、....SnWith the course synchronization rapid 2.1 that Centroid sets up communication connection).
Further, described step 2), if sensor is at TqAnticipated acknowledgement frame is not received, the most preliminary judgement in time
Corresponding Centroid breaks down.
Described step 2) in, when sensor is with power α2PmaxOr α3PmaxAfter sending handshake request: if receiving only one
When the confirmation of Centroid is successfully preengage, then sensor is only attached with this Centroid, row data communication of going forward side by side；If
When receiving the acknowledgement frame of multiple Centroid, then the foundation the earliest of the timestamp on acknowledgement frame is selected to connect, line number of going forward side by side
According to communication.
Further, described step 2.1) in, handshake procedure is divided into four steps:
1. sensor sends claim frame by controlling channel to Centroid, detects whether to lead to Centroid
Letter, and preengage the data slot of free time.
2. Centroid is after receiving the claim frame of sensor, sends an acknowledgement frame immediately, is distributed by data slot
Result notice sensor.
If 3. sensor has been assigned to a data slot, just sends a frame and confirm the communication with Centroid；
Otherwise, sensor just sends this of a frame end and Centroid and communicates, and after waiting a random delay, again attempts to hold
Hands.
If 4. sensor confirms to set up connection, then, after Centroid receives this acknowledgement frame, just in agreement
Good data slot starts to carry out data communication with this sensor.
In handshake procedure, if Centroid receives the request of multiple sensor at short notice, please according to receiving
Seek the priority of frame, according to arriving first the principle first obtained, free timeslot is distributed to corresponding sensor；If free timeslot distributes
Complete, then notify that remaining center sensor node is the busiest, these sensors will send request after one section of random delay again
Frame.
If sensor is at a TqTime delay after do not receive the confirmation of Centroid, the most again send request, wherein, Tq
RTT not less than sensor to Centroid.
In the present embodiment, have separate data channel between Centroid and sensor and control channel, the most right
The information of data and control time slot processes accordingly.Control channel and receive the next claim frame of sensor transmission, acknowledgement frame etc.
Control information, sets up communicating between sensor with Centroid, sends the distribution information of data slot；Data channel provides sensing
Data transmission between device and Centroid.
Highly-reliable transmission mechanism is to increase retransmission mechanism by a set of anticollision booking-mechanism and automated power jointly to complete
's.They ensure that effectively and efficiently utilizing of wireless channel, and when certain Centroid breaks down when, sensor
Still can send data by other Centroid to backstage.This way it is secured that the Centroid of field installation and biography
Sensor can utilize part the most intact in existing network to carry out communication under conditions of bottom line is safeguarded as far as possible, and
Complete its function；Meanwhile, this mechanism can also effectively detect it may happen that the Centroid of fault, reduces system maintenance
Cost.
Representative environment sets: assume there is n bar power transmission line on a shaft tower without loss of generality, and every power transmission line only has one
Individual sensor.So, the sensor being installed on every power transmission line on shaft tower C is called S1、S2、S3、....Sn。
1) Initial parameter sets:
Set a sensor every TcMinute gather a secondary data upload to Centroid, adopt between each sensor
By the working method circulated the most in turn.
Centroid is carried out by control channel and data channel with communicating of sensor.Wherein, control channel and be responsible for control
The transmission of signaling processed, such as handshake procedure；Data channel is responsible for transmitting data.
The shaft tower d apart that any two is adjacentgRice.
Setting power enhancement coefficient α1、α2、α3, and 0 < α1<α2<α3<1；Sensor emission power maximum is Pmax.So,
Power α1PmaxMake sensor S1With immediate Centroid communication, but can will not cover other that close on
Centroid.In Fig. 1, sensor neighbouring on shaft tower C is with power α1PmaxMay only be with the Centroid communication on shaft tower C；
Centroid on adjacent shaft tower B, D cannot receive this signal.
Power α2PmaxMake the sensor on shaft tower C can with at a distance of less than 1.5dgShaft tower C, B, D on Centroid
Communicate, but the Centroid on farther shaft tower A, E can not receive this signal.
Similarly, power α3PmaxMake the sensor on shaft tower C can with at a distance of less than 2.5dgShaft tower C, B, D, A,
Centroid on E communicates, but the Centroid on farther shaft tower can not receive this signal.
2) sensor S given below1The detailed process communicated with Centroid foundation:
2.1) S is worked as1When uploading the data to Centroid,
2.1.1) S1With power α1PmaxWith nearest Centroid C, enter according to the anticollision booking-mechanism discussed in 2.1 joints
Row three-way handshake is attempted.Once shake hands successfully if any, then in the follow-up time, carry out data according to the time slot of reservation
Communication.
2.1.2) if three trials are unsuccessful, S1Improve and launch power to α2Pmax, with apart less than 1.5dgCentromere
Point C, B, D, carry out three-way handshake trial also according to the anticollision booking-mechanism discussed in 2.1 joints.If with in any one
Heart node is shaken hands successfully, then carry out data communication according to the time slot of reservation in the follow-up time.
2.1.3) otherwise, S1 improves transmitting power again to α3Pmax, with distance less than 2.5dgCentroid C, B, D,
A, E, carry out three-way handshake trial according to anticollision booking-mechanism.If shaking hands successfully with any one Centroid, then
Data communication is carried out according to the time slot of reservation in the follow-up time.
2.1.4) if can't shake hands successfully, then this time communication is attempted unsuccessfully.
2.2) the rest may be inferred, sensor S2、S3、....SnThe process of communication connection is set up ibid with Centroid.
Accompanying information is as follows: if sensor is at TqNot receiving anticipated acknowledgement frame in time, the most preliminary judgement is corresponding
Centroid break down.Such as, as sensor S1With power α2PmaxSend handshake request, it is contemplated that can receive in coming from
Three parts of confirmations of the heart node C, B, D.If lacking any one confirmation therein, it is possible to it was initially believed that this Centroid is sent out
Raw fault.
When sensor is with power α2PmaxOr α3PmaxAfter sending handshake request: if receiving only a Centroid really
Recognize when successfully preengaging, then sensor is only attached with this Centroid, row data communication of going forward side by side.If receiving multiple center
During the acknowledgement frame of node, then the foundation the earliest of the timestamp on acknowledgement frame is selected to connect, row data communication of going forward side by side.
Before transmitting data, the data transmission channel that sensor must be known by communicating with Centroid is the most occupied,
And set up connection by a handshake procedure, to reach the purpose of anticollision reservation.
Handshake procedure is divided into three steps:
1. sensor sends claim frame by controlling channel to Centroid, detects whether to lead to Centroid
Letter, and preengage the data slot of free time.
2. Centroid is after receiving the claim frame of sensor, sends an acknowledgement frame immediately, is distributed by data slot
Result notice sensor.
If 3. sensor has been assigned to a data slot, just sends a frame and confirm the communication with Centroid；
Otherwise, sensor just sends this of a frame end and Centroid and communicates, and after waiting a random delay, again attempts to hold
Hands.
If 4. sensor confirms to set up connection, then, after Centroid receives this acknowledgement frame, just in agreement
Good data slot starts to carry out data communication with this sensor.
The sensor process that communicate whole with Centroid is illustrated in fig. 3 shown below:
During shaking hands, after sensor sends claim frame to Centroid, Centroid can be according to the difference of self
Corresponding reply made by the sensor sending claim frame by situation.
Accompanying information processes: if Centroid receives the request of multiple sensor at short notice, according to receiving
The priority of claim frame, according to arriving first the principle first obtained, distributes to corresponding sensor by free timeslot.If free timeslot distributes
Complete, then notify remaining sensor " Centroid is the busiest ".These sensors will send request after one section of random delay again
Frame.
If sensor is at a TqTime delay after do not receive the confirmation of Centroid, the most again send request.Wherein, Tq
It is typically no less than the sensor RTT to Centroid.After three times unsuccessful, power is used to increase automatic retransmission mechanism.
The particular flow sheet that sensor sets up communication connection with Centroid is illustrated in fig. 4 shown below.
Claims (6)
1. increase a data transmission method for the transmission line of electricity radio communication of retransmission mechanism based on automated power, its feature exists
In: described data transmission method comprises the following steps:
1) Initial parameter sets:
Set any one sensor every TcMinute gather a secondary data upload to Centroid, use between each sensor
The working method circulated the most in turn；
Assume that any two shaft tower spacing are dgRice, uses the wireless communication module launching power adjustable, its peak power PmaxAt least
Can be with covering radius as 2.5dgThe scope of rice；It is to say, sensor at most can simultaneously and adjacent 5 centromeres
Point communicates；
Setting power enhancement coefficient α1、α2、α3, and 0 < α1<α2<α3<1；Sensor emission power maximum is Pmax, then,
Power α1PmaxMake sensor S1With immediate Centroid communication, but other centromere closed on will not be covered
Point；
Power α2PmaxMake sensor S1With apart less than 1.5dg3 Centroids of rice communicate；
Similarly, power α3PmaxMake sensor S1With apart less than 2.5dg5 Centroids of rice communicate, but
The farther Centroid on shaft tower can not receive this signal；
2) sensor S1To set up communication process as follows with Centroid:
2.1) S is worked as1When uploading the data to Centroid,
2.1.1)S1With power α1PmaxWith the Centroid on shaft tower, carry out trial of shaking hands；If shaking hands successfully, then follow-up
Time according to reservation time slot carry out data communication；
2.1.2) if it fails, S1Improve and launch power to α2Pmax, with apart less than 1.5dg3 Centroids of rice, enter
Capable trial of shaking hands, if shaking hands successfully with any one Centroid, then enters according to the time slot of reservation in the follow-up time
Row data communication；
2.1.3) otherwise, S1Again improve and launch power to α3Pmax, with apart less than 2.5dg5 Centroids of rice, according to
Anticollision booking-mechanism carries out three-way handshake trial, if shaking hands successfully with any one Centroid, then when follow-up
Data communication is carried out according to the time slot of reservation between；
2.1.4) if can't shake hands successfully, then this time communication is attempted unsuccessfully；
2.2) the rest may be inferred, sensor S2、S3、….SnWith the course synchronization rapid 2.1 that Centroid sets up communication connection).
2. the transmission side data of the transmission line of electricity radio communication of retransmission mechanism is increased as claimed in claim 1 based on automated power
Method, it is characterised in that: described step 2), if sensor is at TqAnticipated acknowledgement frame is not received, the most preliminary judgement in time
Corresponding Centroid breaks down.
3. the data of the transmission line of electricity radio communication increasing retransmission mechanism based on automated power as claimed in claim 1 or 2 pass
Transmission method, it is characterised in that: described step 2) in, when sensor is with power α2PmaxOr α3PmaxAfter sending handshake request: if only
Receive the confirmation of a Centroid when successfully preengaging, then sensor is only attached with this Centroid, line number of going forward side by side
According to communication；If receive the acknowledgement frame of multiple Centroid, then select the foundation the earliest of the timestamp on acknowledgement frame even
Connect, row data communication of going forward side by side.
4. the data of the transmission line of electricity radio communication increasing retransmission mechanism based on automated power as claimed in claim 1 or 2 pass
Transmission method, it is characterised in that: described step 2.1) in, handshake procedure is divided into four steps:
1. sensor sends claim frame by controlling channel to Centroid, detects whether to communicate with Centroid,
And preengage the data slot of free time；
2. Centroid is after receiving the claim frame of sensor, sends an acknowledgement frame, the result distributed by data slot immediately
Notice sensor；
If 3. sensor has been assigned to a data slot, just sends a frame and confirm the communication with Centroid；Otherwise,
Sensor just sends this of a frame end and Centroid and communicates, and after waiting a random delay, again attempts to shake hands；
If 4. sensor confirms to set up connection, then, after Centroid receives this acknowledgement frame, just appointing
Data slot starts to carry out data communication with this sensor.
5. the transmission side data of the transmission line of electricity radio communication of retransmission mechanism is increased as claimed in claim 4 based on automated power
Method, it is characterised in that: in handshake procedure, if Centroid receives the request of multiple sensor at short notice, according to connecing
Receive the priority of claim frame, according to arriving first the principle first obtained, free timeslot is distributed to corresponding sensor；If free timeslot
Distributing, then notify that remaining center sensor node is the busiest, these sensors will be after one section of random delay, and again sending please
Seek frame.
6. the transmission side data of the transmission line of electricity radio communication of retransmission mechanism is increased as claimed in claim 4 based on automated power
Method, it is characterised in that: in handshake procedure, if sensor is at a TqTime delay after do not receive the confirmation of Centroid, the most again
Secondary transmission is asked, wherein, and TqRTT two-way time not less than sensor to Centroid.
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| CN106060771B (en) * | 2016-08-05 | 2020-07-31 | 深圳市飞比电子科技有限公司 | Method and device for dynamically adjusting transmission power of Zigbee transmission equipment |
| CN106448123A (en) * | 2016-09-09 | 2017-02-22 | 国网吉林省电力有限公司松原供电公司 | Data transmission method for power transmission line |
| CN111132058B (en) * | 2019-11-22 | 2021-07-27 | 国网江苏省电力有限公司电力科学研究院 | Data transmission method based on transmission line sensing network and sensing network thereof |
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| CN102065510A (en) * | 2010-10-26 | 2011-05-18 | 北京邮电大学 | Wireless sensor network node adaptive power control system and method based on fuzzy logic |
| CN102833835A (en) * | 2012-08-31 | 2012-12-19 | 北京联合大学 | Node of wireless sensor network based on reinforcing type hybrid power control |
| CN103379608A (en) * | 2013-04-07 | 2013-10-30 | 东南大学 | Method for configuring multilevel transmitting power in wireless sensor network |
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