A method and system for fast wake-up in the field of wireless communication

Abstract

The embodiment of the present application provides a kind of wireless communication technical field fast wake-up method and system, method includes: transmitting end transmits first wake-up signal and second wake-up signal, the time length of second wake-up signal is less than the time length of first wake-up signal, to make receiving end in first sleep state periodic awakening, detect whether first wake-up signal is received;If the first wake-up signal is detected, it enters second sleep state, in the second sleep state periodic awakening, detect whether second wake-up signal is received;If the second wake-up signal is detected, it is successfully awakened, and enters continuous wake-up state.The embodiment of the present application provides a kind of wireless communication technical field fast wake-up method and system, wake-up signal is periodic signal, interference resistance is stronger than single frequency signal, the time length of wake-up signal is shorter, so the speed of awakening will be faster.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, more particularly, to a fast wake-up method and system in the technical field of wireless communication. BACKGROUND

[0002] Low Power Wide Area Network (LPWAN) is a remote wireless network communication technology optimized for M2M (Man to Man, Man to Machine, Machine to Machine) communication scenarios in Internet of Things applications, battery-powered, low-rate, ultra-low power, low-duty-cycle, supporting a cellular convergence gateway with a maximum coverage of 100 kilometers. With the rapid development of Internet of Things applications, in the future, there will be a large number of low-power Internet of Things terminals accessing the network, and large-scale deployment of LPWAN networks needs to meet the requirements of high load, high capacity, high reliability, long coverage, low overhead, low delay and low power consumption.

[0003] In recent years, with a large number of low-power Internet of Things terminals accessing low-power wide area networks, terminal power consumption control will be particularly important. Terminals in low-power wide area networks need to support long-term battery life, so terminals must be in a sleep state most of the time to reduce power consumption. If a terminal wants to initiate communication, it must wake up the target terminal before communicating with it, and then effective communication can be carried out. There are three current wake-up methods: one is to transmit a carrier, and the terminal tests the received carrier signal strength, which exceeds the threshold to be awakened, otherwise it continues to sleep; the second is to transmit a 01010101…bit stream, and the terminal counts the number of 01 or 10 received, which exceeds the set threshold to be awakened, otherwise it continues to sleep; the third is to repeatedly transmit a data packet, and the terminal receives a complete one of the data packets to be awakened, otherwise it continues to sleep.

[0004] The disadvantages of methods one and two are that they cannot identify illegal signals, are easily disturbed to cause false wake-up, and the probability of false wake-up cannot be calculated and evaluated, thereby greatly reducing the system reliability, and the grouping of the wake-up signal is small, and the diversity of the wake-up signal cannot be achieved. The biggest disadvantage of method three is high power consumption. In order to reliably receive the frame synchronization signal of the data packet, the time of the receiving window is at least 2 times the total transmission length of the data packet, thereby increasing power consumption, and also causing the process from sleep to wake-up of the terminal to be slow.

[0005] In patent CN 114143861 A, a solution is proposed for the above methods, which can reduce the probability of false wake-up, but the wake-up efficiency is slow due to the long transmission time of the wake-up signal, and the single frequency signal is easily disturbed by other signals.

[0006] Therefore, there is an urgent need for a fast wake-up method in the field of wireless communication to solve the above problems. SUMMARY

[0007] To solve the above problems, the embodiments of the present application provide a fast wake-up method in the field of wireless communication, which overcomes the above problems or at least partially solves the above problems, comprising:

[0008] The transmitting end transmits a first wake-up signal and a second wake-up signal, the time length of the second wake-up signal being less than that of the first wake-up signal, so that the receiving end periodically wakes up in a first sleep state and detects whether the first wake-up signal is received;

[0009] If the first wake-up signal is detected, the second sleep state is entered, and the receiving end periodically wakes up in the second sleep state and detects whether the second wake-up signal is received;

[0010] If the second wake-up signal is detected, the wake-up is successful, and the receiving end enters a continuous wake-up state.

[0011] The wake-up period in the first sleep state is less than the time length of the first wake-up signal, and the wake-up period in the second sleep state is less than the time length of the second wake-up signal.

[0012] The method further comprises:

[0013] If the second wake-up signal is not detected in the second sleep state for a preset number of times, the receiving end returns to the first sleep state.

[0014] The wake-up signal comprises N periodic signals, N>2, the center frequency of the nth signal being f n , the time length being T n , T n ≤T n-1 , and the period being L n .

[0015] The embodiments of the present application also provide a fast wake-up system in the field of wireless communication, comprising:

[0016] A transmitting end for transmitting a first wake-up signal and a second wake-up signal, the time length of the second wake-up signal being less than that of the first wake-up signal;

[0017] A receiving end for periodically waking up in a first sleep state and detecting whether the first wake-up signal is received;

[0018] If the first wake-up signal is detected, the receiving end enters a second sleep state, periodically wakes up in the second sleep state, and detects whether the second wake-up signal is received;

[0019] If the second wake-up signal is detected, the wake-up is successful, and a persistent wake-up state is entered.

[0020] A third aspect of the present application provides an electronic device, comprising:

[0021] a processor, a memory, a communication interface and a bus; wherein the processor, the memory and the communication interface complete mutual communication through the bus; the memory stores program instructions which can be executed by the processor, and the processor calling the program instructions can execute the above-mentioned fast wake-up method in the field of wireless communication technology.

[0022] A fourth aspect of the present application provides a non-transitory computer readable storage medium, which stores computer instructions, and the computer instructions make the computer execute the above-mentioned fast wake-up method in the field of wireless communication technology.

[0023] The fast wake-up method and system in the field of wireless communication technology provided by the embodiments of the present application have the following advantages: the wake-up signal is a periodic signal, and the anti-interference ability is stronger than that of a single frequency signal; the length of the second wake-up signal and the wake-up period in the second sleep state are reduced, so that the time length of the wake-up signal is shorter, and therefore the wake-up speed is faster. Each segment of the wake-up signal can have different frequencies and periods, so that the wake-up signal is effectively avoided from being mistaken for an aerial interference signal or other wake-up signals. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 is a flow chart of the fast wake-up method in the field of wireless communication technology provided by the embodiments of the present application;

[0026] Figure 2 is a schematic diagram of the fast wake-up signal in the field of wireless communication technology provided by the embodiments of the present application;

[0027] Figure 3 is a sleep state transition diagram provided by the embodiments of the present application;

[0028] Figure 4 is a schematic diagram of the fast wake-up system structure in the field of wireless communication technology provided by the embodiments of the present application. DETAILED DESCRIPTION

[0029] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0030] Figure 1 is a flow chart of a fast wake-up method in the field of wireless communication technology provided by the embodiments of the present application, as shown in Figure 1 , which comprises:

[0031] 101, the transmitting end transmits the first wake-up signal and the second wake-up signal, the time length of the second wake-up signal is less than that of the first wake-up signal, so that the receiving end periodically wakes up in the first sleep state and detects whether the first wake-up signal is received;

[0032] 102, if the first wake-up signal is detected, the second sleep state is entered, and the second wake-up signal is periodically detected in the second sleep state;

[0033] 103, if the second wake-up signal is detected, the wake-up is successful, and the continuous wake-up state is entered.

[0034] Figure 2 is a schematic diagram of a fast wake-up signal in the field of wireless communication technology provided by the embodiments of the present application, as shown in Figure 2 , the present application can be divided into two stages in time sequence, the first stage is to detect the first wake-up signal in the first sleep state, and the second stage is to detect the second wake-up signal in the second sleep state.

[0035] Figure 3 is a sleep state transition diagram provided by the embodiments of the present application, and the specific transition process is shown in Figure 3 , whether to enter the continuous wake-up state is determined through twice sleep state wake-up signal detection.

[0036] It can be understood that the transmitting end transmits the wake-up signal corresponding to the receiving window of the receiving end. Specifically, the transmitting end transmits the wake-up signal, the wake-up signal contains two signals, both of which are periodic signals, wherein the center frequency of the first signal (the first wake-up signal) is f1, the time length is T1, and the period is L1; the center frequency of the second signal (the second wake-up signal) is f2, the time length is T2, and the period is L2. Wherein T2<T1.

[0037] On the basis of the above embodiment, the wake-up period in the first sleep state is less than the time length of the first wake-up signal, and the wake-up period in the second sleep state is less than the time length of the second wake-up signal.

[0038] It can be understood that the receiving of the receiving end in each state is also limited. Specifically, the receiving end periodically and briefly wakes up in the first sleep state, the wake-up period is less than T1, and after waking up, a window with a length of m1L1 is opened to receive signals (m1 is a real number not less than 1), and it is detected whether there is a first wake-up signal; in the case that the first wake-up signal is detected, the receiving end enters the second sleep state, and periodically and briefly wakes up in the second sleep state, the wake-up period is less than T2, and after waking up, a window with a length of m2L2 is opened to receive signals (m2 is a real number not less than 1), and it is detected whether there is a second wake-up signal; in the case that the second wake-up signal is detected, the receiving end enters the continuous wake-up state and starts to receive and send data.

[0039] On the basis of the above embodiment, the method further comprises:

[0040] If in the second sleep state, the second wake-up signal is not detected in the preset number of wake-ups, the receiving end returns to the first sleep state.

[0041] It can be understood that there may be a scenario in which the receiving end is not successfully woken up in the second sleep state. Therefore, if in the second sleep state, the second wake-up signal is not detected in K wake-ups, the receiving end returns to the first sleep state, periodically and briefly wakes up in the first sleep state, the wake-up period is less than T1, and after waking up, a window with a length of m1L1 is opened to receive signals, and it is detected whether there is a first wake-up signal.

[0042] On the basis of the above embodiment, the wake-up signal comprises N periodic signals, wherein the center frequency of the nth signal (wake-up signal n) is f n , the time length is T n , T n ≤T n-1 , and the period is L n .

[0043] It is expanded that the wake-up signal can be sent in a manner of more than two segments. When there are N segments, the N segments are periodic signals, N>2, wherein the center frequency of the nth signal (wake-up signal n) is f n , the time length is T n , and the period is L n . Wherein T n ≤T n-1 .

[0044] A specific example is as follows:

[0045] The transmitting end transmits a wake-up signal, the wake-up signal contains two sections of signals, both of which are periodic signals, wherein the first section of signals (the first wake-up signal) has a center frequency of f1, a time length of 1 second, and a period of 4 milliseconds (the data transmitted by the periodic signal is {1, 1, 0, 0}, which is MSK modulated, and the baud rate is 1000 Baud); the second section of signals (the second wake-up signal) has a center frequency of f2, a time length of 200 milliseconds, and a period of 4 milliseconds (the data transmitted by the periodic signal is {1, 1, 0, 0}, which is MSK modulated, and the baud rate is 1000 Baud).

[0046] The receiving end periodically and briefly wakes up in the first sleep state, the period of recovery is 900 milliseconds, a window with a length of 20 milliseconds is opened after waking up to receive signals, and the wake-up signal is sampled, and then it is detected whether the first wake-up signal is in the sampled signals of the wake-up window and the frequency is near f1, if so, it is judged that the first wake-up signal is detected, and the second sleep state is entered.

[0047] The receiving end periodically and briefly wakes up in the second sleep state, the period of recovery is 100 milliseconds, a window with a length of 20 milliseconds is opened after waking up to receive signals, and then it is detected whether the second wake-up signal is in the sampled signals of the wake-up window and the frequency is near f2, if so, it is judged that the second wake-up signal is detected.

[0048] In the case of detecting the second wake-up signal, the wake-up is successful, the continuous wake-up state is entered, and data transmission and reception are started; if the second wake-up signal is not detected in 11 times of waking up in the second sleep state, the first sleep state is returned, the receiving end periodically and briefly wakes up in the first sleep state, the period of recovery is 900 milliseconds, a window with a length of 20 milliseconds is opened after waking up to receive signals, and it is detected whether the first wake-up signal is in the window.

[0049] Figure 4 The embodiment of the application provides a kind of wireless communication technical field fast wake-up system structure schematic diagram, as shown in Figure 4 It includes: transmitting end 401 and receiving end 402, wherein:

[0050] The transmitting end 401 is used to transmit the first wake-up signal and the second wake-up signal, and the time length of the second wake-up signal is less than the time length of the first wake-up signal.

[0051] The receiving end 402 is used to periodically wake up in the first sleep state, and detect whether the first wake-up signal is received.

[0052] If the first wake-up signal is detected, the second sleep state is entered, and it is periodically woken up in the second sleep state to detect whether the second wake-up signal is received.

[0053] If the second wake-up signal is detected, the wake-up is successful, and a persistent wake-up state is entered.

[0054] Specifically, how to use the transmitting end 401 and the receiving end 402 to perform the method Figure 1 The technical scheme of the method for quickly waking up in the wireless communication technology field shown in the embodiment is similar in implementation principle and technical effect, and will not be described here.

[0055] The embodiment of the application discloses a computer program product, the computer program product comprises a computer program stored on a non-transitory computer-readable storage medium, the computer program comprises program instructions, when the program instructions are executed by a computer, the computer can execute the method provided by each method embodiment, for example, comprising: the transmitting end transmits the first wake-up signal and the second wake-up signal, the time length of the second wake-up signal is less than the time length of the first wake-up signal, so that the receiving end periodically wakes up in the first sleep state, and it is detected whether the first wake-up signal is received; if the first wake-up signal is detected, a second sleep state is entered, periodically wakes up in the second sleep state, and it is detected whether the second wake-up signal is received; if the second wake-up signal is detected, the wake-up is successful, and a persistent wake-up state is entered.

[0056] The embodiment of the application provides a non-transitory computer-readable storage medium, the non-transitory computer-readable storage medium stores computer instructions, the computer instructions make the computer execute the method provided by each method embodiment, for example, comprising: the transmitting end transmits the first wake-up signal and the second wake-up signal, the time length of the second wake-up signal is less than the time length of the first wake-up signal, so that the receiving end periodically wakes up in the first sleep state, and it is detected whether the first wake-up signal is received; if the first wake-up signal is detected, a second sleep state is entered, periodically wakes up in the second sleep state, and it is detected whether the second wake-up signal is received; if the second wake-up signal is detected, the wake-up is successful, and a persistent wake-up state is entered.

[0057] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software and the necessary general hardware platform, and of course, it can also be realized by hardware. Based on such understanding, the above technical solutions or the part of the prior art can be embodied in the form of a software product, which can be stored in a computer readable storage medium such as ROM / RAM, magnetic disk, optical disc, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the method described in each embodiment or some parts of the embodiment.

[0058] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for fast wake-up in the field of wireless communication technology, characterized in that, The method comprises the following steps: The transmitting end transmits a first wake-up signal and a second wake-up signal, the time length of the second wake-up signal is less than that of the first wake-up signal, so that the receiving end periodically wakes up in a first sleep state and detects whether the first wake-up signal is received; If the first wake-up signal is detected, the second sleep state is entered, the receiving end periodically wakes up in the second sleep state and detects whether the second wake-up signal is received; If the second wake-up signal is detected, the wake-up is successful and the receiving end enters a continuous wake-up state; the wake-up period in the first sleep state is less than the time length of the first wake-up signal, and the wake-up period in the second sleep state is less than the time length of the second wake-up signal; the method further comprises the following steps: If the second wake-up signal is not detected in the second sleep state for a preset number of times, the first sleep state is re-entered.

2. The method of Claim 1, wherein The wake-up signal comprises N periodic signals, N>2, wherein the center frequency of the nth signal is f n , the time length is T n , T n ≤T n-1 , and the period is L n .

3. A fast wake-up system in the field of wireless communication technology, characterized in that, The method comprises the following steps: The transmitting end transmits a first wake-up signal and a second wake-up signal, the time length of the second wake-up signal is less than that of the first wake-up signal; The receiving end periodically wakes up in a first sleep state and detects whether the first wake-up signal is received; If the first wake-up signal is detected, the second sleep state is entered, the receiving end periodically wakes up in the second sleep state and detects whether the second wake-up signal is received; If the second wake-up signal is detected, the wake-up is successful and the receiving end enters a continuous wake-up state; the wake-up period in the first sleep state is less than the time length of the first wake-up signal, and the wake-up period in the second sleep state is less than the time length of the second wake-up signal; if the second wake-up signal is not detected in the second sleep state for a preset number of times, the first sleep state is re-entered.

4. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the program to realize the steps of the fast wake-up method in the wireless communication field according to any one of claims 1 to 2.

5. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the steps of the fast wake-up method in the wireless communication field according to any one of claims 1 to 2.

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