CN102625423A - Wireless communication system and wake up method thereof - Google Patents
Wireless communication system and wake up method thereof Download PDFInfo
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- 238000004891 communication Methods 0.000 title claims abstract description 83
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- 238000005070 sampling Methods 0.000 claims abstract description 10
- 230000000284 resting Effects 0.000 claims description 19
- 230000002618 waking Effects 0.000 claims description 19
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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
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- 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 present invention relates to a wireless communication system and a wake up method thereof. The wake up method includes the following steps: when main equipment has a communication requirement, the main equipment converts a pseudo random sequence code into a wake up bit stream through coding transformation, modulates the wake up bit stream into a wireless modulation signal, and sends the wireless modulation signal to at least one slave equipment in a preset duration time, wherein the preset time is greater than or equal to a sum of a dormancy period and a detection period of the slave equipment; each slave equipment receives the wireless modulation signal in the detection period, demodulates the wireless modulation signal into the wake up bit stream, carries out sampling and decoding on the wake up bit stream, and determines whether to wake up the slave equipment or not according to a decoding result. Through the implementation of a technical scheme of the invention, time synchronization of a wireless communication device involving communication does not needed; anti-interference ability is strong, problems of identity identification and false wake up are solved, and reliability is raised; the detection period of the salve equipment can be shortened, a receiving window time of the salve equipment is reduced, and power consumption of a communication system is reduced.
Description
Technical field
The present invention relates to communication technical field, more particularly, relate to a kind of wireless communication system and awakening method thereof.
Background technology
Micropower (short distance) wireless communication technology began to occur in last century end; Through ten years development, fields such as Industry Control, home intelligent, wireless remote control, security alarm, environmental monitoring, intelligent meter data recording, toxic and harmful monitoring, logistics, RFID have been widely used in.In recent years, go up both at home and abroad again with Internet of Things as financial crisis after, future economy development new growth point.And short-distance wireless communication technology will obtain bigger development in Internet of Things (especially sensing net) is used.
The Internet of Things notion almost is accompanied by low-carbon economy and arrives simultaneously.As the short-distance wireless digital communication technology of one of main communication mode of Internet of Things, must comply with the trend of low-carbon (LC), low energy consumption, develop to low-power consumption, little power consumption direction.In addition, along with the mobile communication equipment application is more and more wider, battery powered product is also more and more, and is harsh more to the requirement of power consumption.
So, how to reduce the overall power consumption of Wireless Telecom Equipment? Obviously, only reduce the transmitting power of transmitter, the current drain that perhaps only reduces receiver is unpractical.The effect of this method is not only not obvious, and the ill effect that can bring communication quality to descend.Have only the mode that adopts communication equipment dormancy when idle, could reduce the average power consumption of communication equipment widely, reach the purpose of consumption reduction.Simultaneously, battery-powered equipment can several times even several useful life that prolongs battery thousandfold.
For the half-duplex wireless communication system or the network of any structure of being made up of two above wireless transmitting-receiving equipments, any agreement, the time that some equipment wherein really works in emission or reception is seldom.When communication equipment does not work in emission, do not work in when receiving yet, make it get into resting state, then can reduce average power consumption greatly.Because the current drain of resting state has only microampere order, even several microampere.And the electric current in Wireless Telecom Equipment when emission is more than tens of milliamperes, and received current is also between tens to tens of milliamperes.Therefore, introduce the communication system of dormancy mechanism, dormancy time is long more, and then average energy consumption is low more.
When certain or certain group Wireless Telecom Equipment was in resting state, it does not receive did not yet launch, and is in non operating state, and still, when other communication equipment need communicate with it, communication was that success will follow.Like this, just need a cover flow process or a method, make the Wireless Telecom Equipment that is in resting state; When miscellaneous equipment need communicate with it; Can perception and accomplish communication, the Wireless Telecom Equipment that is about to be in resting state wakes up, and is current; The method that Wireless Telecom Equipment is waken up under the resting state has multiple, will specifically describe below.
One, timing wake-up communication law
The timing wake-up communication law is all Wireless Telecom Equipments of participating in communication; According to certain timing cycle; Or the timing of the time agreement next time communication of at every turn communicating by letter; Timing arrives, and a plurality of equipment of then participating in communication get into operating state from resting state simultaneously, accomplishes the method that gets into dormancy after communicating by letter again.The work schedule of timing wake-up communication law is as shown in Figure 1.
T can be a constant among Fig. 1, also can be variable.When T is variable, each communication, all participate in the equipment of communication, the time interval T of necessary agreement communication next time.T is the operating time, and in a certain moment in this operating time, and if only if can only have an equipment to be in emission state, and miscellaneous equipment is in accepting state.Obviously, the ratio of T/t is big more, and average power consumption is just more little.
The shortcoming of timing wake-up communication law has:
1) all Wireless Telecom Equipments of participation communication must be synchronous in time, then having relatively high expectations to clock;
2) initial synchronisation needs long time and complicated flow process;
3) clock of different wireless communication equipment owing to there is error, can produce drift, needs a cover alignment mechanism to calibrate;
4) dormancy time is long more, and clock drift is big more, in case drift about excessive or other reason causes equipment to break away from synchronously, the cost that need cost a lot of money synchronously again because and break away from synchronous equipment, just broken away from system;
5) real-time communication and flexibility are not strong, if certain equipment has the communication needs of burst, and miscellaneous equipment then can not be accomplished communication at short notice still in dormancy, can only wait for that timing arrives.
Two, signal strength signal intensity arousal method
The signal strength signal intensity arousal method is the signal strength signal intensity RSSI that utilizes receiver at a time to receive; Through the thresholding of setting; The judgement system sometime the section in, whether produce communication requirement, if; Then equipment is from the method for resting state entering operating state, and this method is called the simulation arousal method again.Its sequential chart is as shown in Figure 2.
Use in the system of signal strength signal intensity arousal method, equipment has principal and subordinate's branch, and the equipment of initiating communication is main equipment (can only have one), and miscellaneous equipment is slave unit (one or more).In major applications, master-slave equipment is fixed.But in the system of some more complicated, the definition of master-slave equipment can be dynamic, and certain equipment possibly be main equipment at a time, also possibly be slave unit.
The main equipment workflow of signal strength signal intensity arousal method is following: main equipment is when having communication requirement, and at first sending duration is T
sWake-up signal, this signal can be a carrier wave, also can be modulation signal.T
s?≧?T?+?t。After main equipment had sent wake-up signal, its slave unit of supposing other was all waken up, and horse back gets into proper communication and slave unit carries out exchanges data, and the duration is T
cExchanges data finishes, and slave unit gets into dormancy.For the slave unit of communication failure, main equipment need start the mistake treatment mechanism to be handled.
The slave unit workflow of signal strength signal intensity arousal method is following: according to fixing cycle T+t, alternation is in the state of dormancy-reception-dormancy-reception.In time T, slave unit is dormancy.In time t, slave unit is in accepting state, but does not receive data, the value of a measure R SSI.T is the window of signal strength signal intensity arousal method, and different slave units is because not synchronously, the phase place of its window is different.
If the rssi measurement value is lower than the thresholding that presets, then expression has no communication request, and slave unit gets into dormancy.If the rssi measurement value is greater than or equal to the threshold value that presets, then expression has main equipment to send communication request, and slave unit does not temporarily get into dormancy, keeps accepting state, and the stand-by period is T
wThe T of different slave units
wValue is different.At T
wDuring this time, slave unit still is in accepting state, but can not proper communication, and the energy during this slatterns.
T
wThe waiting period after, slave unit is received the order or the data of main equipment and is accomplished set transmitting-receiving flow process T
aAfter, get into resting state again.If because reasons such as interference are not received order or data that main equipment is sent, then show this communication failure, slave unit is at stand-by period T
OutAfter, get into dormancy (slave unit 3 among Fig. 2) again.
The advantage of signal strength signal intensity arousal method is that t can get smaller value, and under the present technical situation, the t value is got 2 ~ 4ms.Additional advantage is that realization is fairly simple, but its shortcoming is a lot, mainly contains:
1) poor anti jamming capability, especially with being fatal with adjacent the interference its influence frequently frequently, the interference meeting that continues produces continuous false wake-up to slave unit, thereby causes the unnecessary consumption of energy;
2) can not distinguish the identity of signal sender,, cause the meaningless consumption of energy, the reliability decrease of system so can be not intended to by other system easily or malice is waken up;
3) shorten communication distance, when the RSSI signal is more weak, during the receiver test RSSI signal of slave unit; Disturb and the bigger proportion of noise energy meeting accounting; Cause the confidence level of rssi measurement value to descend, could reduce false wake-up, improve reliability so higher thresholding must be set.High threshold is set can cause communication distance to shorten.Sensitivity such as receiver is-120DBm, but thresholding must be set to-112DBm the then corresponding shortening of communication distance;
4) false wake-up that produces of bursty interference and noise is different and different with environment, and difference also different (such as the activity of sunspot) then finds relatively difficulty of a rational threshold value in time, calculates and also unusual difficulty of energy that the assessment false wake-up consumes.
Three, short packages arousal method
When certain wireless transmitting-receiving equipments has communication requirement in the system; Repeat to send several short packages earlier, receiver is when regularly surveying, as long as correctly receive wherein bag data; Just think communication request is arranged this moment; Temporarily do not get into dormancy, but wait for to get into next step communication process, this method is exactly short packages arousal method.This method also has principal and subordinate's branch, and what send short packages repeatedly is main equipment, and what waken up by short packages is slave unit.
Usually, in the RFDC, packet is generally by bit synchronization; Frame synchronization, data and end mark 4 parts are formed, and its structural representation is as shown in Figure 4; In the nrz encoding system, bit synchronization sign indicating number value is 1010101010 ... Perhaps 01010101 ..., its effect mainly is to let the bit synchronization of receiver extract circuit ability positive lock; Lean on inertia follow-up code element to be produced synchronously promptly usually said midamble code then.
The effect of frame synchronization is, lets receiver pass through relatively frame synchronization of scanning, finds the original position of data division.Receiver has one some shift register; Whenever the data of receiving a bit just displacement once, and the data that will newly receive are put into lowest order, compare with a fixing frame synchronization constant then; Equal then expression synchronously on, otherwise continue to receive next bit and compare.
Data are live parts of communications, are made up of a plurality of bytes.Also include information such as data length, CRC check in the data,, also comprise the redundancy section of FEC in the data if taked the FEC error correction algorithm.
End mark is represented the end of bag data.
Short packages is exactly under the situation that guarantees reliable communication, the packet that total length is the shortest.Wherein bit synchronous length is by the hardware decision, and different hardware circuits or different integrated circuits require the bit synchronization number of transmission also different, generally between 4 ~ 16 bytes, are assumed to be 8 bytes here.Frame synchronization is generally 16,24 or 32 bits, and longer then to miss synchronous probability low more, generally gets 32 bits.Data division can be 0 byte, also can be 1 ~ 3 byte.If there are not data (0 byte), then can't divide into groups to wake up or carry some wake up parameter or order, generally speaking, data division preferably has 1 byte.End mark can not exist in short packages, also can get 1 byte or 2 bytes.Then short packages total length is (by bit calculation):
8*8?+?32?+?2*8?=?112bits
If according to 19200bps, then the time t of transmission is:
t?=?112/19200?≈?5.8ms
Adopt the system of short packages arousal method; Workflow and signal strength signal intensity arousal method basically identical; As shown in Figure 3; Slave unit also works in the alternating state of dormancy-reception-dormancy-reception, but the duration of its reception must double one wrap short packages transmitting time, promptly more than or equal to 2t.2t is the window of short packages arousal method, if baud rate is 19200bps, then the window duration should be 12ms.At this moment, if dormancy time T is long more, then average power consumption is more little.
Short packages arousal method has overcome most of shortcoming of signal strength signal intensity arousal method.If carry certain information again in the short packages, then also can be at T
wLet slave unit be in resting state during this time, thereby further reduce power consumption.
The shortcoming of short packages arousal method is that the window duration must be more than the 2t, could guarantee that slave unit is reliably waken up.
Summary of the invention
The technical problem that the present invention will solve is; Thereby to all Wireless Telecom Equipments of the above-mentioned participation communication of prior art must be synchronously in time, poor anti jamming capability, the long big defective of power consumption that makes of receive window time; A kind of awakening method is provided, and all communication equipments are synchronous in time, antijamming capability is strong, receive window time weak point makes low in energy consumption thereby need not to make.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of awakening method, be used for when main equipment has communication requirement, waking up at least one slave unit, this awakening method comprises:
Main equipment when communication requirement is arranged with pseudo random sequence code through transcoding, coding transform for waking bit stream up; Then the said bit stream that wakes up is modulated into wireless modulated signals; And in the preset duration; Send continuously said wireless modulated signals at least one slave unit, said preset time more than or equal to rest period of said slave unit with survey the phase sum, said rest period constitutes a dormancy awakening cycle with the phase of detection sum;
Each slave unit receives said wireless modulated signals in the detection phase, and said wireless modulated signals is demodulated to wakes bit stream up, then the said bit stream that wakes up is sampled and is deciphered, and judge whether to wake up this slave unit according to decode results.
In awakening method of the present invention, said pseudo random sequence code is the M sequence.
In awakening method of the present invention, said pseudo random sequence code be store in advance or produce by pseudo-random generator.
In awakening method of the present invention,
Main equipment with pseudo random sequence code through transcoding, coding transform for waking up in the bit stream process, this method also comprises: said pseudo random sequence code or bit stream are carried out scrambling;
Slave unit to said wake that bit stream is sampled up and the process deciphered in, this method also comprises: said pseudo random sequence code is carried out descrambling.
In awakening method of the present invention, slave unit judges whether that according to decode results the step of waking this slave unit up comprises:
Number to deciphering the continuous output 0 in back is counted;
Whether the number of judging output 0 continuously surpasses preset limit value, if then wake this slave unit up; If not, then continue to keep resting state.
In awakening method of the present invention, main equipment is in the link of encoding or modulating, to pseudo random sequence code or wake the bit stream negate up;
Slave unit judges whether that according to decode results the step of waking this slave unit up comprises:
Number to deciphering the continuous output 1 in back is counted;
Whether the number of judging output 1 continuously surpasses preset limit value, if then wake this slave unit up; If not, then continue to keep resting state.
In awakening method of the present invention, slave unit after according to decoding pseudo random sequence code in the position calculation stand-by period of a pseudo random sequence in the cycle, when the stand-by period no show, continue to keep resting state; When the stand-by period arrives, then wake this slave unit up.
In awakening method of the present invention, said NRZ, NRZ or the graceful Chester coding of being encoded to.
In awakening method of the present invention, said amplitude shift keying, frequency shift keying or the phase shift keying of being modulated to.
The present invention also constructs a kind of wireless communication system, comprises main equipment and at least one slave unit, and said main equipment comprises:
Coding unit is used for when communication requirement is arranged pseudo random sequence code is encoded into and wakes bit stream up;
Modulating unit is used for the said bit stream that wakes up is modulated into wireless modulated signals;
Transmitting element; Be used in the preset duration; Send continuously said wireless modulated signals at least one slave unit, said preset time more than or equal to rest period of said slave unit with survey the phase sum, said rest period constitutes a complete dormancy awakening cycle with the phase of detection sum;
Each slave unit includes:
Receiving element is used for receiving said wireless modulated signals in the detection phase;
Demodulating unit is used for said wireless modulated signals is demodulated to and wakes bit stream up;
Decoding unit is used for the said bit stream that wakes up is sampled and deciphered;
Wake control unit up, be used for judging whether to wake up this slave unit according to decode results.
The technical scheme of embodiment of the present invention has following beneficial effect:
1. need not synchronous in time between the Wireless Telecom Equipment of participating in communicating by letter;
2. antijamming capability is strong, has solved the problem of identification and false wake-up, has improved reliability;
3. can shorten the detection phase of slave unit, reduce the slave unit receive window time, reduce the power consumption of communication system.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 is the working timing figure of first kind of awakening method of prior art;
Fig. 2 is the working timing figure of second kind of awakening method of prior art;
Fig. 3 is the working timing figure of the third awakening method of prior art;
Fig. 4 is the structure chart of packet in the third awakening method of prior art;
Fig. 5 is awakening method embodiment one flow chart of the present invention;
Fig. 6 is the structure chart of main equipment neutral line feedback shift register embodiment one of the present invention;
Fig. 7 is the structure chart of slave unit neutral line feedback shift register embodiment one of the present invention;
Fig. 8 is the working timing figure of awakening method embodiment one of the present invention;
Fig. 9 is the logic diagram of wireless communication system embodiment one of the present invention.
Embodiment
As shown in Figure 5, in awakening method embodiment one flow chart of the present invention, this awakening method is used for when main equipment has communication requirement, waking at least one slave unit up, specifically may further comprise the steps:
Step S100. main equipment when communication requirement is arranged with pseudo random sequence code through transcoding, coding transform for waking bit stream up; Then the said bit stream that wakes up is modulated into wireless modulated signals; And in the preset duration; Send continuously said wireless modulated signals at least one slave unit, said preset time more than or equal to rest period of said slave unit with survey the phase sum, said rest period constitutes a dormancy awakening cycle with the phase of detection sum;
Each slave unit of step S200. receives said wireless modulated signals in the detection phase, and said wireless modulated signals is demodulated to wakes bit stream up, then the said bit stream that wakes up is sampled and is deciphered, and judge whether to wake up this slave unit according to decode results.
The preferred M sequence of pseudo random sequence code (maximum length sequence), also optional certainly other satisfactory sequence.Select for use the M sequence can obtain a preferable performance, adopt other sequence also can realize the present invention, also belong within the category of the present invention.
In step S100, pseudo random sequence code can be stored in advance, also can be produced by pseudo-random generator, below the basic principle of explanation pseudo random sequence:
The M sequencer normally uses linear feedback shift register (LFSR) to realize; It can produce one group of the longest pseudo random sequence of cycle; Usually the structure of representing LFSR with proper polynomial; If proper polynomial is a primitive polynomial, the sequence that then produces is exactly the M sequence, and proper polynomial is represented as follows:
f(x)?=?c
0+c
1x+c
2x
2+…+?c
nx
n (2.2.1-1)
In the formula: n is the rank of LFSR, and the maximum cycle of the linear m sequence of n rank binary system is N=2
n-1.Fig. 6 is the structure chart of linear feedback shift register (n rank M sequence pseudo-random generator), a among the figure
0, a
1... A
N-1Initial value can not all be 0.The also available The Representation Equation of Fig. 6 is:
a
n?=?c
1a
n-1⊕c
2a
n-2⊕…⊕c
n-1a
1⊕c
na
0?(2.2.1-2)
⊕ representes that mould 2 adds or XOR in the formula (2.2.1-2), and this formula right-hand component is all moved on to the left side, obtains a new equation and is:
a
n⊕c
1a
n-1⊕c
2a
n-2⊕…⊕c
n-1a
1⊕c
na
0?=?0(2.2.1-3)
As shown in Figure 7, according to formula (2.2.1-3), we can obtain the linear feedback shift register of a new tape input.C in this formula and formula (2.2.1-2)
iValue when identical, this shift register can be used as the decoding circuit of pseudo-random generator, its initial value can be any value.When importing n value, after all initial values in the register were removed, its output perseverance was 0.
Below in conjunction with Fig. 8 awakening method of the present invention is described; At first explanation is, the exponent number of the LFSR in the main equipment, proper polynomial respectively with slave unit in exponent number, the proper polynomial of LFSR identical, with the coding/decoding multinomial coupling of the LFSR that guarantees master-slave equipment; Could export continuous 0; Thereby be received machine identification, from resting state, wake up, solved the identification problem.If because noise produced random code, substitution formula (2.2.1-3) is exported 0 probability continuously and is formed progression with the exponent number increase and descend.When the exponent number of LFSR is enough high, when the number of the continuous output 0 of requirement is abundant again, let the probability of the continuous output a plurality of 0 of decoder be almost 0 because of noise, so just solved the problem of noise jamming (false wake-up).
As shown in Figure 8, the workflow of main equipment and slave unit is described respectively below:
The workflow of main equipment at first is described: main equipment when communication requirement is arranged, with pseudo random sequence code through transcoding, coding transform for waking bit stream up, then the said bit stream that wakes up is modulated into wireless modulated signals, and in preset duration T
sIn, sending said wireless modulated signals continuously at least one slave unit, this pseudo random sequence code is produced by the LFSR pseudo-random generator.LFSR needs initialization before startup, but can not be 0 entirely.Continue the time T of transmission
s≧ T+t, wherein T is rest period, and t is the detection phase, and rest period constitutes a dormancy awakening cycle with the phase of detection sum.After main equipment had sent and waken bit stream up, its slave unit of supposing other was all waken up, and horse back gets into proper communication and slave unit carries out exchanges data, and the duration is T
cExchanges data finishes, and slave unit gets into dormancy.For the slave unit of communication failure, like slave unit 3, main equipment need start the mistake treatment mechanism to be handled.
The workflow of each slave unit is described below:
Step 1. slave unit is according to fixing cycle T+t, and alternation is in the state of dormancy-reception-dormancy-reception.In time T, slave unit is dormancy, does not receive any data, and quiescent current is extremely low, reaches below several microamperes;
Step 2. is in time t, and slave unit is in acquisition mode and starts decoder, whenever receives the data of a bit, then exports 1 bit.Start a counter simultaneously, when the bit of output is 1, this counter of zero clearing.When the bit of output was 0, then counter added 1.In the time t that receives, the value of counter is during all the time less than the threshold value M that sets, and wake-up signal is not received in expression, and slave unit gets into dormancy, repeating step 1;
Step 3. is in the time t that receives, and the value of counter is during more than or equal to thresholding, and then wake-up signal is received in expression, and slave unit gets into waits for the efficient communication state, and the stand-by period is T
wAt T
wDuring this time, slave unit still is in accepting state, but can not proper communication, and the energy during this slatterns.If increase an inverse operation, the position of pseudo random sequence in the cycle, can calculate stand-by period T according to the pseudo random sequence code after the decoding
wValue, then can make slave unit at stand-by period T
wAlso get into resting state during this time, send wake-up signal T at main equipment
sDuring end, slave unit can further be saved energy so again through regularly waking up;
Step 4. stand-by period T
wAfter the arrival, the proper communication that master-slave equipment can be scheduled to, behind the sign off, slave unit gets into step 1.If take place that communication makes mistakes etc. problem, then get into the fault processing flow process.
Need to specify to be that when slave unit wakes bit stream up in reception, generally require main equipment at first to send a string bit synchronization sign indicating number, slave unit is according to displacement synchronous code alignment time benchmark and clock frequency.Because among the present invention, the pseudo random sequence that main equipment sends is in a segment encode is long; 0 number and 1 number are equal basically; And long continuous 0 or continuous 1 situation can not appear, and it can be used as bit synchronization and uses, and just effect is worse than transmission clocklike 01010101010 slightly ... 0101 yard.If in the receiving circuit of slave unit, the bit synchronization split circuit requires to send the bit synchronization midamble code of better quality, then can adopt graceful Chester coding to address this problem, and makes to receive the bit synchronization that function is isolated better quality.
Illustrating this awakening method below, is example with baud rate 19200bps here, calculates and adopts in the system of the present invention, the value of window (detection phase) t.Suppose to adopt the LFSR of rank n=20, its multinomial is preferably selected primitive polynomial for use.Then main equipment is when sending wake-up signal, and at first the value of each register of initialization (can not all be 0) according to the synchronised clock of 19200bps, with the sequence code that LFSR produces, is launched after ovennodulation then successively, and the duration is T
sT
sValue comprehensively confirm according to the requirement of power consumption and other are required.Slave unit generally will be waited for the time of 8 bytes from the dormancy to the accepting state, the separated in synchronization mechanism of receiver just can be isolated stable bit synchronization.Simultaneously, begin the correct code element that receives to LFSR decoder input, behind n bit of displacement input (n=20 here), the correct data that each register of decoder all is received refreshes, and old incorrect data are moved out of.At this moment, LFSR begins to export 0, behind continuous output M individual 0 (M can equal n, also can be a bit larger tham, or be slightly smaller than n, determines in the different application, adopts M=n here), has just found wake-up signal.Then find the time of wake-up signal cost to be from waking up to:
t?=?(8*8+n+M)/19200?=?(8*8+20+20)/19200?=?5.4Ms
This time is exactly window time t of the present invention, need not double, and value is a little longer just passable, and such as 5.8Ms or 6Ms, this window time than minimum data bag arousal method is little one times.In other words, slave unit is picked up counting to the conversion that receives by dormancy constantly, if do not scan wake-up signal in the 5.8Ms, then gets into dormancy again.The synchronizing separator circuit of some receiver can be isolated bit synchronization than more efficient in 3 ~ 4 bytes, then the t value can be controlled in the 4Ms.Than the CC1100 of American TI (Texas InstruMent) company production or the family chip compatible with the radio frequency of CC1100.
Preferably, main equipment with pseudo random sequence code through transcoding, coding transform for waking up in the bit stream process, this method also comprises: said pseudo random sequence code or bit stream are carried out scrambling; Corresponding ground, slave unit to said wake that bit stream is sampled up and the process deciphered in, this method also comprises: said pseudo random sequence code is carried out descrambling.
In a replacement scheme, main equipment is in the link of encoding or modulating, to pseudo random sequence code or wake the bit stream negate up.Correspondingly, slave unit judges whether that according to decode results the step of waking this slave unit up comprises:
Number to deciphering the continuous output 1 in back is counted; Whether the number of judging output 1 continuously surpasses preset limit value, if then wake this slave unit up; If not, then continue to keep resting state.
In the above-described embodiments; Mentioned coding can be NRZ NRZ, NRZ RZ, graceful Chester coding etc.; Especially graceful Chester coding, the synchronizing separator circuit or the separated in synchronization that more help a plurality of slave units are machine-processed, isolate the synchronised clock of the bit stream that receives fast and exactly.Mentioned modulation can be adopted any binary system or multi-system modulation system; Such as amplitude shift keying ASK, frequency shift keying fsk or phase shift keying PSK etc.; Or other modulation system, will wake bit stream (baseband signal) up and be modulated to directly or indirectly on any carrier frequency.
In the logic diagram of the wireless communication system embodiment one of the present invention shown in Fig. 9; This wireless communication system comprises main equipment 100 and slave unit 200; Only show a slave unit though should be noted that present embodiment, the present invention does not limit the quantity of slave unit; The logical construction that should be appreciated that other slave unit is identical with the logical construction of slave unit 200.In this wireless communication system, main equipment 100 comprises coding unit 110, modulating unit 120 and the transmitting element 130 that links to each other successively, and slave unit 200 comprises receiving element 210, demodulating unit 220, the decoding unit 230 that links to each other successively and wakes control unit 240 up.In main equipment 100, coding unit 110 is used for when communication requirement is arranged pseudo random sequence code is encoded into and wakes bit stream up; Modulating unit 120 is used for the said bit stream that wakes up is modulated into wireless modulated signals; Transmitting element 130 was used in the preset duration; Send said wireless modulated signals continuously at least one slave unit; Said preset time more than or equal to rest period of said slave unit with survey the phase sum, said rest period constitutes a complete dormancy awakening cycle with the phase of detection sum.In slave unit 200, receiving element 210 is used for receiving said wireless modulated signals in the detection phase; Demodulating unit 220 is used for said wireless modulated signals is demodulated to and wakes bit stream up; Decoding unit 230 is used for the said bit stream that wakes up is sampled and deciphered; Waking control unit 240 up is used for judging whether to wake up this slave unit according to decode results.In this explanation is that each step in the preferred embodiment of awakening method all has corresponding functional module in wireless communication system, do not do at this and give unnecessary details.
Need to prove that in communication system of the present invention, the role of main equipment and slave unit can exchange, which equipment is initiated communication, and which equipment is exactly slave unit, and its identity is not that one deck is constant.In addition, main equipment can have receiving element, also can not have, and promptly main equipment can be single worker (only emission), half-or full-duplex equipment.Slave unit can have transmitter unit, also can not have, but receiving element must be arranged, and promptly slave unit can be single worker (only receiving), half-or full-duplex equipment.
Realization of the present invention, the method that can adopt is a lot.Such as common hardware logic electric circuit, PAL, GAL, programming devices such as CPLD, FPGA field programmable gate array also can adopt software programming or the like.When traffic rate is lower, under the enough situation of the disposal ability of single-chip microcomputer, preferentially adopt software to realize, to reduce cost and to obtain better flexibility.When traffic rate is higher, then need adopt the method for hardware circuit to realize.But no matter adopt which kind of method, all belong within the scope of the present invention's protection.The radio-frequency devices C1100E that the inventor has adopted American TI (Texas InstruMent) company to produce, the microprocessor Mega48 that cooperates American ATMEL to produce has intactly realized above-mentioned functions.
The technical scheme of embodiment of the present invention, the beneficial effect that brings has:
1. compare minimum data bag arousal method,, therefore, reduced the power consumption of communication system, make battery powered Wireless Telecom Equipment, battery lengthening service time because the window time (detection phase) has probably reduced half;
2. improved the reliability of communication system, under the low-power consumption situation of dormancy, can reliably have been waken up;
3. when waking up, can discern identity, avoid false wake-up;
4. good confidentiality needs only and adopts sufficiently high exponent number, and the multinomial of employing difficulty is reduced.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (10)
1. an awakening method is used for when main equipment has communication requirement, waking at least one slave unit up, it is characterized in that this awakening method comprises:
Main equipment when communication requirement is arranged with pseudo random sequence code through transcoding, coding transform for waking bit stream up; Then the said bit stream that wakes up is modulated into wireless modulated signals; And in the preset duration; Send continuously said wireless modulated signals at least one slave unit, said preset time more than or equal to rest period of said slave unit with survey the phase sum, said rest period constitutes a dormancy awakening cycle with the phase of detection sum;
Each slave unit receives said wireless modulated signals in the detection phase, and said wireless modulated signals is demodulated to wakes bit stream up, then the said bit stream that wakes up is sampled and is deciphered, and judge whether to wake up this slave unit according to decode results.
2. awakening method according to claim 1 is characterized in that, said pseudo random sequence code is the M sequence.
3. awakening method according to claim 1 is characterized in that, said pseudo random sequence code be store in advance or produce by pseudo-random generator.
4. awakening method according to claim 1 is characterized in that,
Main equipment with pseudo random sequence code through transcoding, coding transform for waking up in the bit stream process, this method also comprises: said pseudo random sequence code or bit stream are carried out scrambling;
Slave unit to said wake that bit stream is sampled up and the process deciphered in, this method also comprises: said pseudo random sequence code is carried out descrambling.
5. according to each described awakening method of claim 1 to 4, it is characterized in that slave unit judges whether that according to decode results the step of waking this slave unit up comprises:
Number to deciphering the continuous output 0 in back is counted;
Whether the number of judging output 0 continuously surpasses preset limit value, if then wake this slave unit up; If not, then continue to keep resting state.
6. according to each described awakening method of claim 1-4, it is characterized in that main equipment is in the link of encoding or modulating, to pseudo random sequence code or wake the bit stream negate up;
Slave unit judges whether that according to decode results the step of waking this slave unit up comprises:
Number to deciphering the continuous output 1 in back is counted;
Whether the number of judging output 1 continuously surpasses preset limit value, if then wake this slave unit up; If not, then continue to keep resting state.
7. awakening method according to claim 1 is characterized in that, slave unit after according to decoding pseudo random sequence code in the position calculation stand-by period of a pseudo random sequence in the cycle, when the stand-by period no show, continue to keep resting state; When the stand-by period arrives, then wake this slave unit up.
8. awakening method according to claim 1 is characterized in that, said NRZ, NRZ or the graceful Chester coding of being encoded to.
9. awakening method according to claim 1 is characterized in that, said amplitude shift keying, frequency shift keying or the phase shift keying of being modulated to.
10. a wireless communication system comprises main equipment and at least one slave unit, it is characterized in that said main equipment comprises:
Coding unit is used for when communication requirement is arranged pseudo random sequence code is encoded into and wakes bit stream up;
Modulating unit is used for the said bit stream that wakes up is modulated into wireless modulated signals;
Transmitting element; Be used in the preset duration; Send continuously said wireless modulated signals at least one slave unit, said preset time more than or equal to rest period of said slave unit with survey the phase sum, said rest period constitutes a complete dormancy awakening cycle with the phase of detection sum;
Each slave unit includes:
Receiving element is used for receiving said wireless modulated signals in the detection phase;
Demodulating unit is used for said wireless modulated signals is demodulated to and wakes bit stream up;
Decoding unit is used for the said bit stream that wakes up is sampled and deciphered;
Wake control unit up, be used for judging whether to wake up this slave unit according to decode results.
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112073151A (en) * | 2020-09-07 | 2020-12-11 | 中电科仪器仪表有限公司 | Telemetry PCM decoding and frame synchronization method based on FPGA |
| CN112565034A (en) * | 2019-09-10 | 2021-03-26 | 意法半导体(格勒诺布尔2)公司 | Apparatus and method for communicating over a serial bus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112866926A (en) * | 2021-01-07 | 2021-05-28 | 凯联医疗科技(上海)有限公司 | Method for improving reliability of Bluetooth connection in Bluetooth time-sharing broadcast |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080025279A1 (en) * | 2006-07-31 | 2008-01-31 | Motorola, Inc. | Synchronization of multi-system wakeup |
| CN101689891A (en) * | 2006-10-13 | 2010-03-31 | Lg电子株式会社 | Method for managing the power in the wireless network |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483908B (en) * | 2009-02-18 | 2011-05-11 | 王翥 | Wireless sensor network node |
| CN101711052B (en) * | 2009-11-03 | 2012-10-10 | 深圳和而泰智能控制股份有限公司 | Method for reducing stand-by power consumption of wireless transceiver system and system thereof |
| CN101841899A (en) * | 2010-04-29 | 2010-09-22 | 上海福宇龙汽车科技有限公司 | Power supply management method for PKE system |
-
2011
- 2011-03-10 CN CN201110057291.4A patent/CN102625423B/en active Active
- 2011-08-16 WO PCT/CN2011/078471 patent/WO2012119394A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080025279A1 (en) * | 2006-07-31 | 2008-01-31 | Motorola, Inc. | Synchronization of multi-system wakeup |
| CN101689891A (en) * | 2006-10-13 | 2010-03-31 | Lg电子株式会社 | Method for managing the power in the wireless network |
Non-Patent Citations (2)
| Title |
|---|
| JUNAID ANSARI等: "Radio-Triggered Wake-ups with Addressing Capabilities for Extremely Low Power Sensor Network Applications", 《IEEE 19TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, 2008》, 31 December 2008 (2008-12-31) * |
| MATTHEW J. MILLER等: "Minimizing Energy Consumption in Sensor Networks Using a Wakeup Radio", 《2004 IEEE ON WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE》, 31 December 2004 (2004-12-31) * |
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| WO2012119394A1 (en) | 2012-09-13 |
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