CN110831118B - Method for generating Chirp signal of wake-up code with low power consumption and communication method - Google Patents
Method for generating Chirp signal of wake-up code with low power consumption and communication method Download PDFInfo
- Publication number
- CN110831118B CN110831118B CN201810898086.2A CN201810898086A CN110831118B CN 110831118 B CN110831118 B CN 110831118B CN 201810898086 A CN201810898086 A CN 201810898086A CN 110831118 B CN110831118 B CN 110831118B
- Authority
- CN
- China
- Prior art keywords
- wake
- code
- chirp signal
- generating
- terminal equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method for generating a Chirp signal of a wake-up code with low power consumption and a communication method. The method for generating the Chirp signal of the wake-up code comprises the following steps: generating a fixed part; generating a circulating part capable of identifying different terminal devices based on the identification information of the terminal devices; and combining the fixed part and the cyclic part to form a wake-up code Chirp signal. The communication method comprises the following steps: a Chirp signal generation method of the wake-up code; the terminal equipment performs CAD detection by using the fixed part, if the detection is passed, the terminal equipment is matched with the circulating part, otherwise, the terminal equipment enters a sleep state; and the terminal equipment is matched with the circulating part, if the matching is passed, the receiving state is kept to continue receiving signals, otherwise, the terminal equipment enters a sleep state, and energy conservation is realized. The invention can only and accurately wake up the terminal equipment to be woken up, effectively reduces the times of mistaken wake-up, thereby reducing the energy consumption, and particularly can further reduce the power consumption of a wireless low-power-consumption system.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a Chirp signal generation method and a communication method for realizing low-power consumption wake-up codes.
Background
With the continuous development of the internet of things, wireless low-power-consumption communication is widely applied to various industries, such as intelligent meter reading, intelligent parking, vehicle tracking, pet tracking, smart agriculture, smart industry, smart cities, smart communities and the like. However, the power consumption of the wireless transceiver will directly determine the lifetime of the wireless end node. In the application of the wireless low-power-consumption system in the current market, the central main node and the wireless terminal sub-nodes realize energy conservation through a sleep-wake-up mechanism. The so-called sleep-wakeup mechanism is that a child node periodically and automatically wakes up, performs CAD (Channel Activity Detect) detection in a very short wake-up time, and immediately enters a sleep mode if no signal exists, otherwise enters a receiving state.
However, in the conventional shortest data packet wakeup method, after the child node completes the CAD detection, the child node still needs to receive a complete data packet, which contains information such as a preamble byte, an address, a service type, a check bit, and the like. And to ensure that the wireless terminal can be awakened within a windowing time, for example, in meter reading system engineering application, the wireless terminal needs to receive a complete data packet within the windowing time, then analyzes information in the data packet, extracts address bytes and address byte information stored by the wireless terminal to judge, and enters a waiting mode if the address bytes and the address byte information are consistent to prepare for receiving a leading character; and if the two are not consistent, immediately entering a sleep low-power mode. However, for a huge system with many child nodes, when the central master node needs to query each child node in one day, each query for the child nodes is detected by the CAD, which inevitably causes the completion of the complete reception and analysis of query frames of all child nodes, i.e., causes false wake-up.
Disclosure of Invention
The invention aims to make up for at least one defect in the prior art and provides a method for generating a Chirp signal of a wake-up code and a communication method for realizing low power consumption.
In order to solve the technical problem, the invention adopts the following technical scheme:
the method for generating the Chirp signal of the wake-up code with low power consumption comprises the following steps:
generating a fixed part;
generating a circulation part capable of identifying different terminal devices based on the identification information of the terminal devices;
and combining the fixed part and the cyclic part to form a wake-up code Chirp signal.
In some preferred embodiments, the generating of the loop part capable of identifying different terminal devices based on the identification information of the terminal device is specifically: the cyclic part is generated by cyclic shifting based on identification information of different terminal devices.
In some preferred embodiments, the generating a cyclic part capable of identifying different terminal devices based on the identification information of the terminal device is specifically: and configuring different initial frequencies and Chirp slope direction combinations for the identification information of different terminal devices, and further generating the cyclic part.
In some preferred embodiments, the generating a loop portion that can identify different terminal devices based on the identification information of the terminal devices includes: the spreading factor of the system is SF, the total number of the terminal devices required to be carried by the system is more than 2^ SF, the identification information is subjected to binary conversion, and partial binary information is extracted from the obtained binary information to generate the cyclic part.
In a further preferred embodiment, the extracting part of binary information is specifically: extracting the low SF bits of the binary number generates the loop portion.
In some preferred embodiments, the loop portion comprises a chirp signal of one slope or a plurality of slopes.
In a further preferred embodiment, the generating the cyclic part by cyclic shift is specifically: and taking a linear frequency modulation signal corresponding to certain identification information as a basic identification information linear spread spectrum signal, and taking the rest linear frequency modulation signals of the identification information as cyclic shift of the basic identification information linear spread spectrum signal.
In another aspect, the present invention provides a communication method for achieving low power consumption, including:
the method for generating the Chirp signal of the wake-up code;
the terminal equipment performs CAD detection by using the fixed part, if the detection is passed, the terminal equipment is matched with the circulating part, otherwise, the terminal equipment enters a sleep state;
and the terminal equipment is matched with the circulating part, if the matching is passed, the receiving state is kept to continue receiving signals, otherwise, the terminal equipment enters a sleep state, and energy conservation is realized.
In some preferred embodiments, the method further comprises: and the terminal equipment receives the Chirp signal of the wake-up code before the arrival of the complete command, and performs decoding, operation and judgment.
In another aspect, the invention also provides a computer-readable storage medium storing a computer program for use in conjunction with a computing device, the computer program being executable by a processor to implement the above-described method.
Compared with the prior art, the invention has the following beneficial effects:
the cycle part in the Chirp signal of the wake-up code is generated based on the identification information of the terminal equipment, different terminal equipment can be identified, the Chirp signal of the wake-up code can be used for verifying whether the terminal equipment is matched or not, the terminal equipment to be woken up can be woken up uniquely and accurately, the number of times of mistaken wake-up is effectively reduced, the energy consumption is reduced, and the power consumption of a wireless low-power-consumption system can be further reduced.
Drawings
Fig. 1 is a schematic flow chart of a method for generating a Chirp signal of a wake-up code according to the present invention;
FIG. 2 is a flow chart illustrating a communication method for achieving low power consumption according to the present invention;
fig. 3 is a schematic flow chart of a variant of the method for generating a Chirp signal of a wake-up code according to the present invention;
FIG. 4 is a flowchart of a communication method for achieving low power consumption according to the present invention;
FIG. 5 is a flowchart illustrating the wake-up mechanism without address identification wake-up code according to scheme 2;
fig. 6 is a schematic diagram of the wake-up code at address 0 when SF = 2;
fig. 7 is a diagram of the wake-up code at address 1 when SF = 2;
fig. 8 is a diagram of the wake-up code at address 2 when SF = 2;
fig. 9 is a diagram of the wake-up code at address 3 when SF = 2.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to fig. 1 to 9. It should be emphasized that the following description is merely exemplary in nature and is in no way intended to limit the scope of the invention or its applications.
The Chirp signal is a Chirp signal, and refers to a signal in which the frequency changes linearly continuously during the duration. The wake-up code Chirp signal is a Chirp signal, i.e. a wake-up code, for waking up a terminal device in the wireless communication system.
Referring to fig. 1, the method for generating a Chirp signal of a wake-up code with low power consumption according to the present invention includes steps S1 to S3.
And S1, generating a fixed part. The fixed part is a Chirp signal, which can comprise a Chirp signal with one slope or a plurality of slopes, and is used for CAD of terminal equipmentDetect (Channel Activity Detect). The fixed part is that for all the terminal equipments in the system, the wake-up code has a same Chirp signal, which is the fixed part of the wake-up code Chirp signal and has a duration T Fix . The fixed part has a start frequency and an end frequency, and the start phase and the end phase of the fixed part have no requirement on consistency, namely the start phase and the end phase can be consistent or different.
And S2, generating a circulating part capable of identifying different terminal equipment based on the identification information of the terminal equipment. The cyclic part is also a Chirp signal with duration T Cyc . The circulation part is generated according to the identification information of the terminal equipment, and is mainly used for distinguishing the identification information of different terminal equipment, such as the identification information of addresses, serial numbers or product numbers, and the like, so as to identify different terminal equipment. The loop portion may also be referred to as an identification information segment, such as an address segment.
And S3, combining the fixed part and the circulating part to form a Chirp signal of the wake-up code. A fixed part and a cyclic part are included between the initial time and the end time of the wake-up code Chirp signal. The phase at the intersection of the fixed part and the cyclic part has continuity, and the inter-symbol phase has continuity, and the ending phase of the previous chirp symbol is the starting phase of the next chirp symbol.
According to the above, by adding a cyclic part, such as an address field, to the wake-up code Chirp signal, i.e., the wake-up code, since the cyclic part is generated based on the identification information of the terminal device, different terminal devices can be identified, and the verification of whether the terminal devices are matched can be completed by using the wake-up code Chirp signal.
The Chirp signal generation method for realizing the low-power consumption wake-up code can be applied to various communication occasions, such as the communication method for realizing the low-power consumption. Referring to fig. 2, the communication method of the present invention for achieving low power consumption includes steps S100 to S300.
Step S100, the method for generating the Chirp signal of the wake-up code is included.
And S200, the terminal equipment performs CAD detection by using the fixed part, if the detection is passed, the terminal equipment is matched with the circulating part, and otherwise, the terminal equipment enters a sleep state. In a communication system, a wake-up code Chirp signal may be generated by a central node and transmitted to various sub-nodes, such as terminal devices. And after receiving the Chirp signal of the wake-up code, the terminal equipment performs CAD detection by using a fixed part in the Chirp signal of the wake-up code. If the detection is passed, step S300 is entered, otherwise, a sleep state is entered.
And step S300, the terminal equipment is matched with the circulating part, if the matching is passed, the receiving state is kept to continue receiving signals, otherwise, the terminal equipment enters a sleep state, and energy conservation is realized. And after the terminal equipment passes the CAD detection, matching with the circulating part, analyzing the identification information, entering a receiving state if the identification information is successfully matched, receiving a subsequent complete data packet, and otherwise entering a sleep state.
The invention integrates the identification information of the terminal equipment into the chirp signal of the wake-up code as the wake-up instruction, and the terminal equipment to be woken up can be woken up uniquely and accurately before the terminal equipment receives a complete data packet. That is, it is not necessary to wait until the payload data of the complete wakeup frame is received and the de-chirp and decoding of the entire frame are completed before verifying whether the identification information is matched. The times of mistaken awakening are effectively reduced, so that the energy consumption is reduced, and particularly, the power consumption of a wireless low-power-consumption system can be further reduced.
In order to shorten the windowing time as much as possible, the terminal device, such as a wireless terminal, needs to receive the wake-up command (i.e., the wake-up code Chirp signal) immediately after the start of windowing, and perform decoding, calculation and judgment, instead of waiting for the arrival of the complete command (i.e., the complete data packet) before performing the above-mentioned actions.
Step S2, generating a circulating part capable of identifying different terminal devices based on the identification information of the terminal devices specifically comprises the following steps: and configuring different initial frequencies and Chirp slope direction combinations for the identification information of different terminal devices, and further generating the cyclic part. The cyclic portion may comprise a chirp signal of one slope or multiple slopes. Different initial frequency and Chirp slope direction combinations include: the combinations with the same initial frequency but different Chirp slope directions, the combinations with different initial frequencies but the same Chirp slope directions, and the combinations with different initial frequencies and different Chirp slope directions.
Step S2 may also be: the cyclic part is generated by cyclic shifting based on the identification information of the different terminal devices. The cyclic part generated by cyclic shift is specifically: and taking a linear frequency modulation signal corresponding to certain identification information as a linear spread spectrum signal of the basic identification information, and taking the linear frequency modulation signals of the rest identification information as cyclic shift of the linear spread spectrum signal of the basic identification information, so that different initial frequencies and Chirp slope direction combinations are configured for different identification information by a cyclic part.
For cyclic part generation by cyclic shift, for Chirp system with spreading factor SF, the maximum distinguishable number of identification information is 2 SF, i.e. the maximum number of shifts of the cyclic part is 2 SF. When the total quantity of the terminal equipment required to be carried by the system is more than 2^ SF, the identification information of the terminal equipment can be subjected to binary conversion, partial binary information is extracted from the obtained binary information to generate a cyclic part, and the complete identification information can be used as Payload data to be transmitted, so that the purpose of expanding the capacity of the sub-nodes of the system is realized. Specifically, the low-SF bit generation cycle part of the binary number can be extracted, so that the number of times of false awakening can be further reduced, and the requirement of low power consumption is met. Wherein, extracting the low SF bit of the binary number means taking the SF bit from the lowest order bit to the highest order bit of the binary number.
The Chirp signal generated by the method for generating the Chirp signal of the wake-up code can be used as the wake-up code in a low-power long-distance wireless system, and the capacity of the sub-node of the system can be effectively enlarged. Meanwhile, the power consumption can be effectively reduced by combining the communication method of the invention.
The sequence of the steps of the method for generating a Chirp signal and the method for communicating in the present invention is not unique, and for example, step S2 may be executed before step S1.
In another aspect, the present invention also discloses a computer-readable storage medium storing a computer program for use in conjunction with a computing device, the computer program being executed by a processor to implement the above-described wake-up code Chirp signal generation method or the above-described communication method.
The present invention is described in detail below:
setting basic parameters of the system: bandwidth BW =125kHz, spreading factor SF =10, symbol period Tc =0.0082s, duration of the fixed part and the cyclic part T Fix ＝T cyc Where = Tc/2=0.0041s, the identification information indicates the address of the terminal device, i.e., the loop portion is a loop address segment.
Thus, the chirp signal X of the fixed part Fix (t) is:
base chirp signal X of cyclic part, i.e. cyclic address field Cyc (t) is:
wherein: a is the signal amplitude, t is the time,
to fix the initial phase of the first segment of the part,
to fix the initial phase of the second segment of the part, the spread spectrum signal slope μ = BW/T Cyc =3.0518e +007. The generation flow of spread spectrum signals for different addresses can refer to fig. 3. For the cyclic address segment, the address segment of the wake-up code of the address 0 is the basic Chirp signal of the cyclic address segment, the other addresses are the right shift cycle of the basic Chirp signal, and the time step t of the shift cycle step = Tc/2^ (SF + 1) =4 microseconds, frequency step f of cyclic shift step ＝BW/2^SF＝122.0703Hz。
Fig. 6 to 9 are schematic diagrams of wake-up codes with addresses 0, 1, 2 and 3 when SF =2, respectively.
SF＝10When the address extension enable ExAddrEn =0, txaddrwhite =128, and is smaller than 2^ SF, the address segment linear spread spectrum signal of the wake-up code will be divided into two segments, similar to the case of address 1 when SF =2, please refer to fig. 7. Wherein the starting frequency f of the first segment 01 ＝TxAddrWhole*f step =15625Hz, starting frequency f of the second segment 02 Linear spread spectrum signal of =0Hz, i.e. TxAddrWhole =128 address segment is:
wherein n is a unit time step of t step The time of day index is used to index,
the initial phase of the first segment of the cyclic address segment,
is the initial phase of the second segment of the cyclic address segment.
When the address expansion enable ExAddrEn =1, txAddrWhole =1357 and is greater than 2^ SF, the address expansion can be performed by:
determining the value of address extension enable ExAddrEn and the bit number of an extension bit ExAddrBit; when ExAddrEn =1, the address extension is valid; exAddrEn =0, it is invalid. Let exaddlen =1, exAddrBit =2Bit;
decimal conversion is carried out on the TxAddrWhole to obtain TxAddrBit = [010101001101], and SF + ExAddrBit bits are obtained in total;
extracting 0101001101 of the low SF bit of the TxAddrBit, converting the bit into a decimal system, obtaining a decimal number 333 as an address TxAddr of the wake-up code, and generating the wake-up code according to the decimal system;
and taking the TxAddrBit of the whole address as effective information, and putting the effective information into a fixed position of Payload for final full address matching.
Referring to fig. 3, the method for generating a Chirp signal of a wake-up code of the present invention may further include: after setting system parameters and generating a Chirp signal of a fixed part, judging whether address extension enabling ExAddrEn is 1 or not, namely whether address extension is effective or not; if ExAddrEn =1, further judging whether the TxAddrWhole is greater than 2^ (SF + ExAddrBit), if the TxAddrWhole is not greater than 2^ (SF + ExAddrBit), converting the TxAddrWhole into SF + ExaddrBit binary bits TxAddrBit, taking the low SF bit of the TxAddrBit and converting the low SF bit into decimal TxAdddr as address segment circulation information of the wake-up code, generating a circulation address segment of the wake-up code based on the TxAdddr, and if the TxAddrWhole is greater than 2^ (SF + ExaddrBit), sending a prompt that the address configuration exceeds the maximum value; if ExAddrEn is not 1, judging whether TxAddrWhole is larger than 2^ SF or not, if the TxAddrWhole is not larger than 2^ SF, generating a Chirp signal of the wakeup code circular address field based on the TxAddrWhole, and if the TxAddrWhole is larger than 2^ SF, sending a prompt that the address configuration exceeds the maximum value; finally, the fixed part and the cyclic address section are combined to form a complete wake-up code.
In a communication system, two situations exist in the expanded capacity C =2^ (ExAddrBit + SF) and the number of terminals actually carried by the system Nsta:
(1) If C = Nsta, the false wake-up times are both 2^ ExAddrBit-1 no matter the high SF bit or the low SF bit is taken;
(2) If C is larger than Nsta, the high SF bit is used as an address field, the low ExAddrBit does not carry out address matching, the low ExAddrBit is traversed in a terminal list of the system, and the false awakening frequency is still 2^ ExaddrBit-1; if the low-SF bit is adopted, because C > Nsta, the high-ExAddrBit bit does not satisfy traversal, that is, the number of nodes with the same low-SF bit in the address list is less, so the false wake-up frequency is less than 2^ ExAddrBit-1, for example, the address needs to be expanded by 5 times, if ExAddrBit =3, the high-SF bit is adopted to generate a cyclic address segment, the false wake-up frequency is 7, and the false wake-up frequency of the low-SF bit is 3.
According to the above, the cycle address segment generated by extracting the low SF bit is combined with the communication method of the present invention, so that the number of false awakening times caused by the extraction is relatively equal to the number of error rate times caused by extracting the high SF bit, and the number of false awakening times of the system can be effectively reduced on the basis of the increase of the system capacity, thereby realizing low power consumption.
In order to effectively explain that the address matching of the present invention can effectively reduce the power consumption problem, the present invention (hereinafter referred to as scheme 1) and the wake-up code without address identification (hereinafter referred to as scheme 2) are applied in the same communication system to compare the power consumption, and the parameters of the system are shown in table 1. Where scheme 1 employs a non-address extension mode, i.e., exadren =0.
TABLE 1 System parameters for scheme 1 and scheme 2
referring to fig. 4, a wakeup mechanism, that is, a communication method in the scheme 1: the method comprises the steps that the subnode periodically monitors a channel (channel) every 2s, namely CAD processing is carried out; in the communication process, the sub-nodes can be divided into target sub-nodes and non-target sub-nodes, when no signal exists in a channel or the performance does not meet the requirement after CAD analysis, the inquiry signal of no main node is considered to arrive, the non-target sub-nodes directly enter a sleep state, otherwise, the main node is considered to have the inquiry signal, the target sub-nodes pass the CAD detection, and the cyclic part of a plurality of wake-up codes is continuously carried out for address matching; if the address matching is passed, determining that the inquiry is the inquiry of the target child node, entering a receiving state, receiving the whole frame data sent by the main node, and sending the data to the main node, otherwise entering a sleep state, and waiting for the next monitoring event; the CAD detection of the scheme 1 only needs to utilize a fixed part of a wakeup code symbol to complete the detection, so that the subsequent power consumption statistics needs 10 wakeup codes for completing the address matching based on the detection of the scheme 1 from the CAD;
referring to fig. 5, a wakeup mechanism, i.e., a communication method, of the wakeup code without address identification in scheme 2: the child nodes periodically listen to the channel every 2s, i.e. CAD processing. When no signal exists in the channel or the performance does not meet the requirement after CAD analysis, the inquiry signal of no main node is considered to arrive, the non-target child node directly enters a sleep state, otherwise, the main node is considered to have the inquiry signal to arrive, the target child node passes the CAD detection and enters a receiving state, the whole frame data sent by the main node is received, and whether the target node is inquired or not is judged by analyzing the frame; if the query is to the target node, entering a sending state and sending data, otherwise entering a sleep state.
As can be seen from the wake-up mechanisms in the schemes 1 and 2, the child nodes of the two systems have four energy consumption operation modes: wakeUp (CAD \ Syn \ AddrMatch), data transmission (Tx), data reception (Rx), sleep (Sleep). Detailed power consumption values for case 1 and case 2 are given below, see table 2.
TABLE 2 comparison of the indices of scheme 1 and scheme 2
Description of the drawings: table 2 has two rows of values corresponding to some indexes, where the uplink is a value corresponding to 100 cell users, and the downlink is a value corresponding to 1024 cell users.
From a comparison of the power consumption of the two schemes of scheme 1 and scheme 2 in table 2, it can be seen that the following advantages exist in the present invention (scheme 1) compared to scheme 2:
from the index "number of usable days", the service life of the scheme 2 wake-up scheme is greatly affected by the number of cell users, and the larger the number of cell users, the smaller the number of usable days. Whereas scheme 1 is almost negligibly affected by the number of cell users. The main reason for this phenomenon is that the address segment is added to the wake-up code in scheme 1, and the communication method, i.e., the address matching mechanism, of the present invention is combined to reduce the number of times of false wake-up, so that under the condition that the number of users in a cell is large, power consumption (for example, total power consumption for false wake-up in one day, total power consumption for one day) is further reduced, and the service life is prolonged.
The foregoing is a further detailed description of the invention in connection with specific/preferred embodiments and it is not intended to limit the invention to the specific embodiments described. It will be apparent to those skilled in the art that numerous alterations and modifications can be made to the described embodiments without departing from the inventive concepts herein, and such alterations and modifications are to be considered as within the scope of the invention.
Claims (10)
1. The method for generating the Chirp signal of the wake-up code with low power consumption is characterized by comprising the following steps of:
generating a fixed part;
generating a circulation part capable of identifying different terminal devices based on the identification information of the terminal devices;
combining the fixed part and the cyclic part to form a Chirp signal of a wake-up code;
the terminal equipment receives a complete data packet and is awakened uniquely and accurately by integrating identification information of the terminal equipment into the wake-up code Chirp signal; the fixed part of the Chirp signal of the wake-up code is used for the terminal equipment to perform CAD detection, if the detection is passed, the terminal equipment is matched with the circulating part, otherwise, the terminal equipment enters a sleep state; if the matching is passed, the terminal equipment keeps a receiving state to continue receiving signals, otherwise, the terminal equipment enters a sleep state, and energy conservation is realized.
2. The method for generating a wake-up code Chirp signal according to claim 1, wherein the generation of the cyclic part capable of identifying different terminal devices based on the identification information of the terminal devices specifically comprises: the cyclic part is generated by cyclic shifting based on identification information of different terminal devices.
3. The method for generating a wake-up code Chirp signal according to claim 1, wherein the generation of the cyclic part capable of identifying different terminal devices based on the identification information of the terminal devices specifically comprises: and configuring different initial frequencies and Chirp slope direction combinations for the identification information of different terminal devices, and further generating the cyclic part.
4. The method for generating a wake-up code Chirp signal according to claim 1 or 2, wherein the generating of the cyclic part that can identify different terminal devices based on the identification information of the terminal devices comprises: the spreading factor of the system is SF, the total number of the terminal devices required to be carried by the system is more than 2^ SF, the identification information is subjected to binary conversion, and partial binary information is extracted from the obtained binary information to generate the cyclic part.
5. The method for generating a wake-up code Chirp signal according to claim 4, wherein the extracting part of binary information specifically comprises: extracting the low SF bits of the binary number generates the loop portion.
6. The method for generating a wake-up code Chirp signal according to claim 1, wherein: the loop portion includes a chirp signal of one slope or multiple slopes.
7. The method for generating a wake-up code Chirp signal according to claim 2, wherein the generating of the cyclic part by cyclic shift specifically comprises: and taking a linear frequency modulation signal corresponding to certain identification information as a basic identification information linear spread spectrum signal, and taking the rest linear frequency modulation signals of the identification information as cyclic shift of the basic identification information linear spread spectrum signal.
8. A communication method for achieving low power consumption, comprising:
the method for generating a Chirp signal of a wake-up code according to any one of claims 1 to 7;
the terminal equipment performs CAD detection by using the fixed part of the Chirp signal of the wake-up code, if the detection is passed, the terminal equipment is matched with the circulating part, and if the detection is not passed, the terminal equipment enters a sleep state;
and the terminal equipment is matched with the cyclic part of the Chirp signal, if the matching is passed, the receiving state is maintained to continue receiving the signal, otherwise, the terminal equipment enters a sleep state, and energy conservation is realized.
9. The communication method according to claim 8, further comprising: and the terminal equipment receives the Chirp signal of the wake-up code before the arrival of the complete command and performs decoding, operation and judgment.
10. A computer readable storage medium storing a computer program for use in conjunction with a computing device, the computer program being executable by a processor to implement the method of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898086.2A CN110831118B (en) | 2018-08-08 | 2018-08-08 | Method for generating Chirp signal of wake-up code with low power consumption and communication method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898086.2A CN110831118B (en) | 2018-08-08 | 2018-08-08 | Method for generating Chirp signal of wake-up code with low power consumption and communication method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110831118A CN110831118A (en) | 2020-02-21 |
| CN110831118B true CN110831118B (en) | 2022-11-29 |
Family
ID=69540894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810898086.2A Active CN110831118B (en) | 2018-08-08 | 2018-08-08 | Method for generating Chirp signal of wake-up code with low power consumption and communication method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110831118B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614589B (en) * | 2020-04-16 | 2023-07-18 | 上海磐启微电子有限公司 | Tri-angle FM signal modulator, demodulator and wireless communication system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101087220A (en) * | 2006-06-09 | 2007-12-12 | 中国科学院软件研究所 | Dormancy monitoring method for MAC layer of wireless sensor network |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10334519B2 (en) * | 2016-04-22 | 2019-06-25 | Qualcomm Incorporated | Chirp signal formats and techniques |
| CN107787029B (en) * | 2016-08-30 | 2020-07-21 | 华为技术有限公司 | Method and device for transmitting wake-up frame in wireless local area network |
| CN107734611A (en) * | 2017-09-28 | 2018-02-23 | 河南卓正电子科技有限公司 | One kind is based on LoRa wireless kilowatt meter reading-out system wake-up mechanisms |
| CN107682921A (en) * | 2017-10-18 | 2018-02-09 | 哈尔滨工业大学（威海） | The low-power consumption awakening method of wireless terminal |
-
2018
- 2018-08-08 CN CN201810898086.2A patent/CN110831118B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101087220A (en) * | 2006-06-09 | 2007-12-12 | 中国科学院软件研究所 | Dormancy monitoring method for MAC layer of wireless sensor network |
Non-Patent Citations (1)
| Title |
|---|
| 户用仪表数据无线集抄关键技术的研究;姜馨;《中国优秀硕士论文电子期刊网》;20170228;全文，尤其参见说明书第2页第1段至第4页最后1段 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110831118A (en) | 2020-02-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Su et al. | Idle slots skipped mechanism based tag identification algorithm with enhanced collision detection | |
| KR100932920B1 (en) | Sensor node wake-up device and method | |
| CN105472715A (en) | Low power consumption wireless network realization method based on Lora wireless modules | |
| KR101569927B1 (en) | Techniques for solving overhearing problems of body area network medium access control protocols | |
| CN105979547B (en) | A kind of communication means of wide area network, node apparatus and system | |
| CN103745181B (en) | A kind of low frequency activates the anti-collision method of active label | |
| CN111194073B (en) | Data receiving or transmitting method, device, terminal and readable storage medium | |
| CN110958676B (en) | Low-power consumption dormancy equipment awakening method and system | |
| US10050881B2 (en) | Method and apparatus for transmitting and receiving data in communication system | |
| CN110972236B (en) | Energy-saving signal transmission method, terminal and network side equipment | |
| US20190090189A1 (en) | Wake-up message generation and decoding | |
| Oller et al. | IEEE 802.11‐enabled wake‐up radio system: design and performance evaluation | |
| WO2021159876A1 (en) | Communication method and system, data sending device, and data receiving device | |
| CN111436093A (en) | Energy-saving signal transmission method, terminal and network side equipment | |
| CN110831118B (en) | Method for generating Chirp signal of wake-up code with low power consumption and communication method | |
| CN104218996A (en) | Optical module | |
| CN106953809B (en) | 485 time-sharing communication-based equipment resource acquisition method | |
| CN110581755B (en) | Downlink control channel detection method, terminal and network side equipment | |
| WO2023193508A1 (en) | Wake-up signal (wus) receiving method and sending method | |
| CN111314495A (en) | Communication method, device, equipment, storage medium and system based on LoRaWAN of Internet of things | |
| CN106508105B (en) | For RF identification read write line to label information transferring method | |
| CN101667242B (en) | Back-off method and back-off device, and method and device for detecting radio-frequency identification signal state | |
| CN116546439B (en) | Method and system for quickly waking up electronic shelf label and sending group message | |
| CN108668239B (en) | Wireless communication system with low power consumption and supporting one-to-many interaction and communication method thereof | |
| CN103605949A (en) | Large-scale RFID (radio frequency identification) anti-collision method based on CDMA (code division multiple access) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |