CN108337724A - A method of sending energy consumption for being reduced in passive reflective communication - Google Patents
A method of sending energy consumption for being reduced in passive reflective communication Download PDFInfo
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- CN108337724A CN108337724A CN201810212489.7A CN201810212489A CN108337724A CN 108337724 A CN108337724 A CN 108337724A CN 201810212489 A CN201810212489 A CN 201810212489A CN 108337724 A CN108337724 A CN 108337724A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses reduce the method for sending energy consumption in a kind of communication for passive reflective.The present invention is before sending each data packet, count the total number of bit " 0 " in byte to be sent, it is bit " 0 " or bit " 1 " in combination with energy consumption position, decide whether to invert the binary digit in data to be sent, and increase corresponding label in data link layer, recipient is then sent to by physical layer；After recipient receives data, the binary data that inverted receiver arrives is decided whether to according to the label of data link layer, recovers data to be sent.This method is easy to operate, by tabling look-up, adding up, XOR operation can complete paired data processing, be very suitable for power consumption requirements are higher and computing capability is weak occasion and use.
Description
Technical field
The present invention relates to low-power consumption passive reflective field of communication technology, it is particularly suitable for sending per bit " 0 " and sends
Per bit " 1 " consumes the different occasion of energy；The each side for participating in communication obtains energy from external environment, wireless by reflecting
Electric wave is communicated.
Background technology
For a long time, people have been devoted to the extensive interconnection of object and object, although Internet of Things is unanimously had an optimistic view of, always not
There is the extensive Internet of Things application of explosion type.Critically important reason is energy problem, and the replacement of battery is a big bottleneck.Closely
Nian Lai, passive reflective communication is had an optimistic view of by industry, and under the scene, communication party is not necessarily to battery, and whole energy both are from external environment,
Such as thermal energy, luminous energy, movement energy, electromagnetic wave etc..
Critically important problem is how to reduce energy expenditure, and most energy expenditure comes from channel radio under the scene
Letter.Communication side under the scene is generally in suspend mode and work two states, and the power consumption of dormant state is well below working condition.
FM0 codings are very suitable for above-mentioned occasion.FM0 codings indicate logic level using level change in the window of position, such as
Fruit level is only overturn from the section start of position window, then it represents that bit " 1 ".If all turned among the section start and position window of level window in place
Turn, then it represents that bit " 0 ".Twice, level overturning is primary when sending bit " 1 ", every time for level overturning when due to sending bit " 0 "
Level overturning will wake up sender and execute corresponding program, and bring the consumption of energy, so the average power consumption for sending " 0 " is remote
More than the average power consumption of transmission " 1 ".I.e. on average, bit " 0 " is sent when encoding using FM0 more to consume energy.
Under Miller codings, bit " 1 " position window section start not transition, there is transition to indicate in center；Then to bit " 0 "
It is divided into single " 0 " or continuous " 0 " and gives different disposal；Individually when " 0 ", keep the level before " 0 " constant, i.e., window boundary in place
Locate level not transition, window intermediate level also not transition in place；For continuous " 0 ", then the boundary in continuous two " 0 " generates electricity
Flat transition.So the average power consumption for sending " 0 " is less than or equal to send the average power consumption of " 1 ".I.e. on average, it is compiled using Miller
Bit " 1 " is sent when code more to consume energy.
Before making the present invention, relevant invention has：
On November 1st, 2007, ZTE Co., Ltd have applied for patent " the information transmission side in radio-frequency recognition system
Method ".On November 3rd, 2009, ZTE Co., Ltd have applied for patent " a kind of coding/decoding method and dress of FM0 and FM1 codes
It sets ".On December 8th, 2011, Beijing Watch Data System Co., Ltd have applied for a kind of patent " decoding side of FM0 coded datas
Method and device ".On November 15th, 2013, GCI Science ＆ Technology Co., Ltd have applied for a kind of patent " passive communication side
Method ".On October 31st, 2014, Shanghai answer sub-micro Electronics Co., Ltd. and have applied for a kind of patent " ultrahigh frequency radio frequency identification (RFID) reader FM0 volumes
The coding/decoding method of code ".On December 5th, 2014, Liaoning Technical University have applied for Ningwu a kind of patent " improved passive communicator
Part ".Above-mentioned patent relates generally to decoding method, is all not involved with the communication energy consumption problem for reducing sender.
Invention content
In view of the deficiencies of the prior art, the present invention provides the side for sending energy consumption is reduced in a kind of communication for passive reflective
Method.
The present invention is suitable for sending the occasion different with the consumption energy of per bit 1 is sent of per bit 0, and the present invention is being sent out
Before sending each data packet, the total number of bit " 0 " in byte to be sent is counted, is bit " 0 " or ratio in combination with energy consumption position
Special " 1 " decides whether to invert the binary digit in data to be sent, and increases corresponding label in data link layer, then logical
It crosses physical layer and is sent to recipient；After recipient receives data, reversion is decided whether to according to the label of data link layer and is connect
The binary data received recovers data to be sent.
Beneficial effects of the present invention：
(1) per bit " 0 " occasion different with per bit " 1 " consumption energy is sent is being sent, the present invention can reduce hair
The transmission energy consumption for the side of sending extends sender's working life；
(2) method is simple, only use table look-up, addition and XOR operation, arithmetic speed is fast, be very suitable for power consumption requirements it is higher and
The weak occasion of computing capability uses；
(3) length is constant after data processing, is handled convenient for recipient.
Specific implementation mode
The present invention is suitable for sending per bit " 0 " occasion different with per bit " 1 " consumption energy is sent.No matter adopt
With which kind of coding mode, it is E0 that note, which sends the average energy that per bit " 0 " consumes, and what transmission per bit " 1 " consumed is averaged
Energy is E1, and above-mentioned energy includes mainly two parts：It wakes up the energy of consumption and executes the energy for sending consumption in operation.If E0
>E1, then bit " 0 " is referred to as energy consumption position；If E0<E1, then bit " 1 " is referred to as energy consumption position.
Technical solution provided by the invention is as follows, including " pre-processing simultaneously transmission process " of sender and " connecing for recipient
It receives and obtains data procedures ".
" pre-processing simultaneously transmission process " of sender：
Step 1. sender usually suspend mode, wakes up when needing transmission data from suspend mode；Remember n byte to be sent successively
For B1, B2 ..., Bn.
Step 2. sender uses B1, and the decimal value of B2 ..., Bn are as subscript, in array arryNum [256]
It tables look-up successively, obtains the number of bit " 0 " contained in the binary coding of each byte, be denoted as O1, O2 ... successively,
On remembers that O=O1+O2+ ...+On, i.e. O are B1, the total number of bit " 0 " contained by each byte in B2 ..., Bn；
If O>4*n and bit " 0 " are energy consumption position, jump to step 3；
If O<4*n and bit " 1 " are energy consumption position, jump to step 3；
Otherwise, step 4 is jumped to.
Each byte in step 3. byte B1 to be sent a to n, B2 ..., Bn, step-by-step exclusive or 0xFF, obtains successively
The byte N 1, N2 ... new to n, Nn, byte N 1, N2 ..., Nn is filled into the data portion of data frame, according to reality
The data link layer protocol on border sets the fields such as header data and the verification of data frame, and position is arranged in data frame header field
Overturning label, goes to step 5.
Byte B1, B2 ..., Bn are filled into the data portion of data frame by step 4., according to actual data link
Layer protocol sets the fields such as header data and the verification of data frame, it is not necessary to be marked in data frame header field setting bit flipping.
Step 5. gives bottom software data frame, and is sent to reciever by sender by radio communication, terminates.
" receive and obtain data procedures " of recipient：
Step 1. recipient is usually in suspend mode, and signal is waken up when jumping to next, receives each ratio of data frame one by one
Spy repeats the process of dormant and awakening in receive process, until a data frame receives.When verifying and confirm that the frame is errorless
Afterwards, it obtains the data portion in the data frame and is followed successively by byte R1, R2 ..., Rn.
If step 2. data frame header field is marked provided with bit flipping, step 3 is gone to, step 4 is otherwise gone to.
Step 3. is to byte R1, and each byte in R2 ..., Rn, step-by-step exclusive or 0xFF, obtains byte P1 successively,
P2 ..., Pn, using byte P1, P2 ..., Pn replace the data field received in data frame successively, and replaced
Data frame gives the processing of upper-layer protocol software；Go to step 5.
Step 4. directly gives the processing of upper-layer protocol software the data frame received.
Step 5. terminates.
Embodiment：By experiment before system deployment, the magnitude relationship of E0 and E1 are determined by means of instrument and equipment, such as can be with
The energy for being sent by sensor measurement sender and recipient and being consumed when receiving bit 0 and bit 1, and to sender and
Recipient uses, and FM0 is encoded, E0>E1, bit " 0 " are energy consumption position；Miller is encoded, E0<E1, bit " 1 " are consumption
It can position.
Sender's data frame maximum is no more than 127 bytes, and data frame generally comprises：Start field, preamble field, class type-word
Section, destination address, source address, data length, header check, data, CRC check.It can be by means of " the class of sender's data frame
Some particular value of type-word section " is used as " bit flipping label ", is determined according to the data link layer protocol of actual use, cannot and assist
Used value repeats in view.
ArryNum [256] array that sender uses is used for quickly calculating bit " 0 " number in different bytes, the number
Group element be followed successively by 8,7,7,6,7,6,6,5,7,6,6,5,6,5,5,4,7,6,6,5,6,
5, 5, 4, 6, 5, 5, 4, 5, 4, 4, 3, 7, 6, 6, 5, 6, 5, 5, 4, 6, 5, 5, 4, 5, 4, 4,
3, 6, 5, 5, 4, 5, 4, 4, 3, 5, 4, 4, 3, 4, 3, 3, 2, 7, 6, 6, 5, 6, 5, 5, 4, 6,
5, 5, 4, 5, 4, 4, 3, 6, 5, 5, 4, 5, 4, 4, 3, 5, 4, 4, 3, 4, 3, 3, 2, 6, 5, 5,
4, 5, 4, 4, 3, 5, 4, 4, 3, 4, 3, 3, 2, 5, 4, 4, 3, 4, 3, 3, 2, 4, 3, 3, 2, 3,
2, 2, 1, 7, 6, 6, 5, 6, 5, 5, 4, 6, 5, 5, 4, 5, 4, 4, 3, 6, 5, 5, 4, 5, 4, 4,
3, 5, 4, 4, 3, 4, 3, 3, 2, 6, 5, 5, 4, 5, 4, 4, 3, 5, 4, 4, 3, 4, 3, 3, 2, 5,
4, 4, 3, 4, 3, 3, 2, 4, 3, 3, 2, 3, 2, 2, 1, 6, 5, 5, 4, 5, 4, 4, 3, 5, 4, 4,
3, 4, 3, 3, 2, 5, 4, 4, 3, 4, 3, 3, 2, 4, 3, 3, 2, 3, 2, 2, 1, 5, 4, 4, 3, 4,
3, 3, 2, 4, 3, 3, 2, 3, 2, 2, 1, 4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1,
0 }, such as arryNum [0] be 8, arryNum [255] is 0.
Recipient receives data according to the data frame format appointed with sender and is checked after receiving a data frame
Whether head " type field " is " bit flipping label ", if it is data portion is needed to be converted, otherwise need not converted.
The method of the present invention is easy to operate, by tabling look-up, adding up, XOR operation can complete paired data processing, very
It is suitable for the occasion that power consumption requirements are higher and computing capability is weak to use.
It is above the right model rather than limiting the invention in order to illustrate purpose for the specific implementation mode explanation of the present invention
It encloses.
Claims (3)
1. reducing the method for sending energy consumption in a kind of communication for passive reflective, being suitable for sending per bit 0 and sending unit
Bit 1 consumes the different occasion of energy, it is characterised in that：
Before sending each data packet, the total number of bit 0 in byte to be sent is counted, is bit 0 in combination with energy consumption position
Or bit 1, decide whether to invert the binary digit in data to be sent, and increase corresponding label in data link layer, then
It is sent to recipient by physical layer；
After recipient receives data, the binary data that inverted receiver arrives is decided whether to according to the label of data link layer,
Recover data to be sent.
2. reducing the method for sending energy consumption in a kind of communication for passive reflective according to claim 1, it is characterised in that：
The pretreatment of the sender and process for sending data packet is specially：
Step 1. sender usually suspend mode, wakes up when needing transmission data from suspend mode；Remember n byte to be sent successively
For B1, B2 ..., Bn；
Step 2. sender uses B1, and the decimal value of B2 ..., Bn are as subscript, in array arryNum [256] successively
It tables look-up, obtains the number of bit 0 contained in the binary coding of each byte, be denoted as O1, O2 ..., On successively, remember O
=O1+O2+ ...+On, i.e. O are B1, the total number of bit 0 contained by each byte in B2 ..., Bn；
If O>4*n and bit 0 are energy consumption position, jump to step 3；
If O<4*n and bit 1 are energy consumption position, jump to step 3；
Otherwise, step 4 is jumped to；
Each byte in step 3. byte B1 to be sent a to n, B2 ..., Bn, step-by-step exclusive or 0xFF, obtains n successively
New byte N 1, N2 ..., Nn, byte N 1, N2 ..., Nn is filled into the data portion of data frame, according to actual
Data link layer protocol sets the header data and check field of data frame, and bit flipping mark is arranged in data frame header field
Note, goes to step 5；
Byte B1, B2 ..., Bn are filled into the data portion of data frame by step 4., are assisted according to actual data link layer
View sets the header data and check field of data frame, it is not necessary to be marked in data frame header field setting bit flipping；
Step 5. gives bottom software data frame, and is sent to reciever by sender by radio communication, terminates.
3. reducing the method for sending energy consumption in a kind of communication for passive reflective according to claim 1, it is characterised in that：
The process that recipient received and obtained data is specially：
Step 1. recipient is usually in suspend mode, and signal is waken up when jumping to next, receives each ratio of data frame one by one
Spy repeats the process of dormant and awakening in receive process, until a data frame receives；When verifying and confirm that the frame is errorless
Afterwards, it obtains the data portion in the data frame and is followed successively by byte R1, R2 ..., Rn；
If step 2. data frame header field is marked provided with bit flipping, step 3 is gone to, step 4 is otherwise gone to；
Step 3. is to byte R1, and each byte in R2 ..., Rn, step-by-step exclusive or 0xFF, obtains byte P1, P2 successively,
..., Pn, using byte P1, P2 ..., Pn replace the data field received in data frame successively, and replaced data
Frame gives the processing of upper-layer protocol software；Go to step 5；
Step 4. directly gives the processing of upper-layer protocol software the data frame received；
Step 5. terminates.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112929302A (en) * | 2021-01-12 | 2021-06-08 | 浙江大学 | Semi-passive reflector assisted channel estimation method for intelligent reflector system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112929302A (en) * | 2021-01-12 | 2021-06-08 | 浙江大学 | Semi-passive reflector assisted channel estimation method for intelligent reflector system |
| CN112929302B (en) * | 2021-01-12 | 2022-03-15 | 浙江大学 | Semi-passive reflector assisted channel estimation method for intelligent reflector system |
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Application publication date: 20180727 |