CN117641543A

CN117641543A - A signal generation method and device

Info

Publication number: CN117641543A
Application number: CN202410108459.7A
Authority: CN
Inventors: 曹永照
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2024-01-26
Filing date: 2024-01-26
Publication date: 2024-03-01
Anticipated expiration: 2044-01-26
Also published as: CN117641543B

Abstract

The embodiment of the present application discloses a signal generation method and device. The method includes: obtaining the bit information of the switch keying OOK signal corresponding to the wake-up signal, which is used to wake up the terminal device to establish a communication connection; according to the OOK signal bit information, and generates a modulated carrier signal based on the Fourier series expansion. By adopting the embodiments of the present application, power consumption can be reduced and interference can be avoided.

Description

Signal generation method and device

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a signal generating method and apparatus.

Background

An important challenge for internet of things terminal devices is device power consumption. Since Rel-16, the third Generation partnership project (3rd Generation Partnership Project,3GPP) has been researching the energy saving technology of fifth Generation mobile communication technology (5 th-Generation, 5G) terminal devices. Although the power consumption of the 5G terminal equipment can be greatly reduced in the prior art, the power consumption requirement of the terminal equipment distant from the Internet of things, such as the standby time requirement of the industrial sensor terminal for more than 1 year and the wearable terminal for more than 2 weeks, has a larger gap. If the terminal is always in an idle standby state, no uplink and downlink service exists, and the energy-saving effect can be achieved, but the standby time is shorter in a practical scene by considering the service receiving and transmitting requirements. Therefore, it is necessary to continue to explore a technical solution capable of doubling the standby time of the terminal device in 5G evolution (5G-Advanced). To meet this requirement, a Wake-Up Signal (WUS) technique with Low Power consumption is proposed, and how to generate Low Power consumption (LP) WUS is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a signal generation method and device, which can realize the awakening of terminal equipment, reduce the power consumption and avoid interference.

In a first aspect, an embodiment of the present application provides a signal generating method, where the method is applied to a network device, or a chip or a circuit configured in the network device, and includes:

acquiring bit information of an on-off keying OOK signal corresponding to a wake-up signal, wherein the wake-up signal is used for waking up terminal equipment to establish communication connection; and generating a modulated carrier signal based on a Fourier series expansion according to the bit information of the OOK signal.

And generating a modulated carrier signal based on the Fourier series expansion according to the bit information of the OOK signal by converting the wake-up signal into the bit information of the on-off keying OOK signal. The terminal equipment only needs to simply detect one bit of information, realizes the wake-up of the terminal equipment, establishes communication connection with the network equipment, reduces the power consumption of signal detection, is compatible with the existing waveform, and avoids interference. And when the terminal equipment does not need to communicate with the network equipment, the main communication unit can be closed by the terminal equipment, so that the power consumption of the terminal equipment is further reduced.

In one possible design, the modulation is performed by selecting a plurality of subcarriers in the bandwidth allocated to the wake-up signal at intervals. Thereby avoiding interference between subcarriers.

In one possible design, the modulation factor for each subcarrier in the plurality of subcarriers is a factor in the fourier series expansion.

In one possible design, the coefficients in the fourier series expansion are real coefficients of the modulation coefficients or imaginary coefficients of the modulation coefficients, or the coefficients in the fourier series expansion are modulation coefficients of the first path signal or modulation coefficients of the second path signal.

The coefficients in the fourier series expansion are real coefficients in the modulation coefficients or imaginary coefficients in the modulation coefficients.

In one possible design, the fourier series expansion is a fourier series expansion of a square wave or a fourier series expansion of a trapezoidal wave.

In one possible design, when the bit information of the OOK signal is 1, the fourier series expansion of the square wave adopted satisfies:the method comprises the steps of carrying out a first treatment on the surface of the When the bit information of the OOK signal is 0, the fourier series expansion of the square wave adopted satisfies: / >Wherein the saidIs a Fourier series, said->For the amplitude, M is an integer greater than or equal to 1, n is an integer greater than or equal to 1 and less than or equal to M, t is time, and w= = -is>And T is a period. Through the two different high-low level changes, the terminal equipment can identify the bit information of the OOK signal, so that the terminal equipment is awakened, and the power consumption of the terminal equipment is reduced.

In one possible design, when the bit information of the OOK signal is 1, the fourier series expansion of the trapezoidal wave adopted satisfies:the method comprises the steps of carrying out a first treatment on the surface of the When the bit information of the OOK signal is 0, the fourier series expansion of the trapezoidal wave adopted satisfies:wherein, said->Is a Fourier series, said->For the rising edge duration or the falling edge duration, said +.>For the amplitude, M is an integer greater than or equal to 1, n is an integer greater than or equal to 1 and less than or equal to M, and w= =>And T is a period. Through the two different high-low level changes, the terminal equipment can identify the bit information of the OOK signal, so that the terminal equipment is awakened, and the power consumption of the terminal equipment is reduced.

In one possible design, the T is the width of the carrier signal, and the T is determined according to the signal quality reported by the terminal device.

In one possible design, the carrier signal has a first width when the signal quality is greater than a first threshold and a second width when the signal quality is less than or equal to the first threshold, wherein the first width is less than the second width. That is, when the signal quality reported by the terminal device is better, a narrower carrier signal can be selected, so that the signal transmission efficiency is improved, and when the signal quality reported by the terminal device is poorer, a wider carrier signal can be selected, so that the signal transmission quality is ensured.

In one possible design, the T is a sample level, a symbol level, a slot level, or a time domain resource unit.

In one possible design, M is the number of selected subcarriers.

In one possible design, when the bit information of the OOK signal is 1, a windowing process is used to intercept the carrier waveform of T/2; when the bit information of the OOK signal is 0, the carrier is not modulated, and the T is a period. The terminal equipment is enabled to wake up the terminal equipment based on whether the carrier signal is windowed or not to identify the bit information of the OOK signal, and the power consumption of the terminal equipment is reduced.

In one possible design, the carrier signal is transmitted to the terminal device, which is used to wake up the terminal device to establish the communication connection.

In a second aspect, an embodiment of the present application provides a signal generating apparatus, including:

the acquisition module is used for acquiring bit information of an on-off keying OOK signal corresponding to a wake-up signal, wherein the wake-up signal is used for waking up the terminal equipment to establish communication connection;

and the generating module is used for generating a modulated carrier signal based on the Fourier series expansion according to the bit information of the OOK signal.

In one possible design, the generating module is further configured to modulate by selecting a plurality of subcarriers in a bandwidth allocated to the wake-up signal at intervals.

In one possible design, when the bit information of the OOK signal is 1, the fourier series expansion of the square wave adopted satisfies:the method comprises the steps of carrying out a first treatment on the surface of the When the bit information of the OOK signal is 0, the method is adoptedThe fourier series expansion of the square wave satisfies: />Wherein, said->Is a Fourier series, said->For the amplitude, M is an integer greater than or equal to 1, n is an integer greater than or equal to 1 and less than or equal to M, t is time, and w= = -is>And T is a period.

In one possible design, when the bit information of the OOK signal is 1, the fourier series expansion of the trapezoidal wave adopted satisfies:the method comprises the steps of carrying out a first treatment on the surface of the When the bit information of the OOK signal is 0, the fourier series expansion of the trapezoidal wave adopted satisfies:wherein, said->Is a Fourier series, said->For the rising edge duration or the falling edge duration, said +. >For the amplitude, M is an integer greater than or equal to 1, n is an integer greater than or equal to 1 and less than or equal to M, and w= =>And T is a period.

In one possible design, the carrier signal has a first width when the signal quality is greater than a first threshold and a second width when the signal quality is less than or equal to the first threshold, wherein the first width is less than the second width.

In one possible design, M is the number of selected subcarriers.

In one possible design, when the bit information of the OOK signal is 1, a windowing process is used to intercept the carrier waveform of T/2; when the bit information of the OOK signal is 0, the carrier is not modulated, and the T is a period.

In one possible design, the transmitting module is configured to transmit the carrier signal to the terminal device, where the carrier signal is used to wake up the terminal device to establish the communication connection.

The operations and advantages performed by the signal generating device may be referred to the methods and advantages described in the first aspect, and the repetition is not repeated.

In a third aspect, the present application provides a signal generating apparatus comprising a processor and a memory for storing a computer program; the processor is configured to execute the computer program stored in the memory, to cause the signal generating device to perform the method according to any one of the first aspects.

In a fourth aspect, the present application provides a signal generating apparatus, which may be a network device, or an apparatus in a network device, or an apparatus that can be used in a matching manner with a network device. The signal generating device may also be a chip system. The signal generating means may perform the method of the first aspect. The function of the signal generating device can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above. The module may be software and/or hardware. The operations and advantages performed by the signal generating device may be referred to the methods and advantages described in the first aspect, and the repetition is not repeated.

In a fifth aspect, the present application provides a computer readable storage medium for storing a computer program which, when executed, causes the method of any one of the first aspects to be implemented.

In a sixth aspect, the present application provides a computer program product comprising a computer program which, when executed, causes the method according to any one of the first aspects to be carried out.

In a seventh aspect, embodiments of the present application provide a communication system, which includes at least one network device and at least one terminal device, where the network device is configured to perform the steps in the first aspect.

In an eighth aspect, a chip is provided, the chip comprising a processor for communicating with an external device or an internal device, and a communication interface for implementing the methods of the above aspects.

In one possible design, the chip may further include a memory having stored therein a computer program or instructions, the processor for executing the computer program or instructions stored in the memory, or derived from other programs or instructions. The computer program or instructions, when executed, is operable to perform the methods of the various aspects described above.

In one possible design, the chip may be integrated on a network device.

Drawings

In order to more clearly describe the technical solutions in the embodiments or the background of the present application, the following description will describe the drawings that are required to be used in the embodiments or the background of the present application.

Fig. 1 is a schematic diagram of a communication system provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of a low power wake-up mechanism;

FIG. 3 is a schematic diagram of a manner of WUS generation;

FIG. 4 is a waveform diagram of an on-off keying modulation method;

fig. 5 is a schematic flow chart of a signal generating method according to an embodiment of the present application;

fig. 6A is a schematic diagram of an OFDM modulation process;

fig. 6B is a schematic diagram of another OFDM modulation process;

FIG. 7A is a schematic representation of a Fourier series expansion of a square wave;

FIG. 7B is a schematic representation of a Fourier series expansion of a trapezoidal wave;

FIG. 8 is a schematic diagram of a signal processing provided by an embodiment of the present application;

fig. 9 is a schematic structural diagram of a signal generating device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

As shown in fig. 1, fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application. The communication system includes a network device and a terminal device.

A network device is an apparatus deployed in a radio access network to provide wireless communication functionality for terminal devices. The network devices may include various forms of macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like. In systems employing different radio access technologies, the names of network devices may vary, such as base transceiver stations (Base Transceiver Station, BTS) in Global System for Mobile communications (Global System for Mobile Communication, GSM) or code division multiple Access (Code Division Multiple Access, CDMA) networks, node Bs (NodeBs, NB) in wideband code division multiple Access (Wideband Code Division Multiple Access, WCDMA), evolved Node Bs (eNBs) in long term evolution (Long Term Evolution, LTE). The network device may also be a wireless controller in the context of a cloud wireless access network (Cloud Radio Access Network, CRAN). The network device may also be a base station device in a fifth generation mobile communication system (the fifth Generation, 5G) network or in next generation wireless communication, or a network device in a future evolved public land mobile network (PublicLandMobileNetwork, PLMN) network. The network device may also be a wearable device or an in-vehicle device. The network device may also transmit a receiving node (Transmission and Reception Point, TRP).

The terminal device may be an environmental internet of things device, and may include various handheld devices, vehicle mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem with wireless communication capabilities. The terminal device may be a Mobile Station (MS), a Subscriber Unit (Subscriber Unit), a Cellular Phone (Cellular Phone), a Smart Phone (Smart Phone), a wireless data card, a personal digital assistant (Personal Digital Assistant, PDA) Computer, a tablet, a wireless Modem (Modem), a handheld device (Handset), a Laptop (Laptop Computer), a machine type communication (Machine Type Communication, MTC) terminal, etc.

The communication system may be applicable to a long term evolution (Long Term Evolution, LTE) system, a universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS) system, a code division multiple access (Code Division Multiple Access, CDMA) system, a wireless local area network (Wireless Local Area Network, WLAN) or a fifth generation mobile telecommunications system (the fifth Generation, 5G) or a next generation wireless telecommunications system, etc.

Since Rel-16, the third Generation partnership project (3rd Generation Partnership Project,3GPP) has been researching the energy saving technology of fifth Generation mobile communication technology (5 th-Generation, 5G) terminal devices. As shown in table 1, table 1 is the energy saving characteristics of the standardized terminal equipment. The existing energy-saving technology of the terminal equipment can greatly reduce the power consumption of the 5G terminal, but has a larger gap from the power consumption requirement of the terminal of the Internet of things, such as the standby time requirement of the industrial sensor terminal for more than 1 year and the wearable terminal for more than 2 weeks.

TABLE 1

Smart watches are typically equipped with small capacity (200-600 mAh) batteries, limited by the size of the device. As shown in table 2, table 2 is an idle state power consumption and standby time duration analysis of the smart watch. Wherein the discontinuous reception (discontinuous reception, DRX) cycle is 1.28s. The standby time length of the 5G smart watch under the conditions of different DRX periods (0.64 s, 1.28s and 2.56 s) is different, and the standby time length of the 5G smart watch is larger than the target of 2 weeks. It should be noted that, if the terminal device is always in idle standby state, there is no uplink and downlink service, and the standby time is shorter in the actual scenario in consideration of the requirement of service transmission/reception. Therefore, it is necessary to continue to explore a technical solution capable of doubly increasing the standby duration of the terminal in 5G-Advanced. To address this need, low power wake-up receivers and wake-up signal techniques are proposed.

TABLE 2

The 5G mobile terminal is based on the existing communication unit, and a low-power consumption wake-up receiver is introduced to process the wake-up signal, so that the power consumption is reduced and the time delay is kept low. As shown in fig. 2, fig. 2 is a schematic diagram of a low power wake-up mechanism. The terminal device comprises a main communication unit and a wake-up receiver unit. When no service is required, the terminal device closes the main communication unit and only opens the wake-up receiver unit. When the network equipment needs to communicate with the terminal equipment, the network equipment can send a low-power consumption wake-up signal to the terminal equipment, the terminal equipment wakes up the receiver unit to detect the wake-up signal, after the wake-up signal is successfully received, the main communication unit is triggered to be opened, communication connection with the network side is established, and the service is received and transmitted through the established communication connection.

In a wireless fidelity (Wireless Fidelity, wiFi) system, an on-off keying (OOK) signal is independently generated in a time division manner, and then a data signal is generated to transmit, so that the method cannot be applied to a 5G system. Therefore, a new signal needs to be introduced, on one hand, the detection needs to be simple, and the purpose of reducing the successful consumption is achieved; on the other hand, compatibility with existing waveforms is required to avoid interfering with existing 5G users. As shown in fig. 3, fig. 3 is a schematic diagram of a WUS generation manner, in which bandwidths between OFDM data streams are allocated to WUS, modulated by selecting subcarriers in the bandwidths allocated to WUS, and a modulated carrier signal is sent to a terminal device, so as to meet the above requirements.

The embodiment of the application relates to OOK modulation, and the OOK modulation is described below. As shown in fig. 4, fig. 4 is a waveform diagram of an on-off keying modulation method. OOK is a special case of shift keying (Amplitude Shift Keying, ASK) modulation. If one amplitude is 0 and the other amplitude is not zero, OOK. Binary on-off keying, also known as binary amplitude keying (2 ASK), uses a unipolar non-return zero code sequence to control the switching on and off of a sinusoidal carrier. Vm (t) is a digital signal to be transmitted, acos (2pi fct) is an unmodulated carrier, and Vam (t) is an OOK modulated carrier signal. The modulation principle of OOK is used to control one amplitude to 0 and the other amplitude to non-zero.

As shown in fig. 5, fig. 5 is a schematic flow chart of a signal generating method according to an embodiment of the present application. The method mainly comprises the following steps:

s501, acquiring bit information of an on-off keying OOK signal corresponding to a wake-up signal, wherein the wake-up signal is used for waking up terminal equipment to establish communication connection.

Specifically, the network device may convert the wake-up signal into bit information of the OOK signal by performing processes such as encoding and scrambling on the wake-up signal. The bit information of the OOK signal may be 1 or more bits, and the embodiment of the present application is illustrated with 1 bit. The bit information of the on-off keying OOK signal corresponding to the wake-up signal may be 1 or 0. For example, when the network device needs to communicate with the terminal device, the bit information of the OOK signal is 1, and when the network device does not need to communicate with the terminal device, the bit information of the OOK signal is 0.

S502, generating a modulated carrier signal based on a Fourier series expansion according to the bit information of the OOK signal.

In particular, the network device may modulate by selecting a plurality of sub-carriers in the bandwidth allocated to the wake-up signal. Further, the network device may modulate by selecting a plurality of subcarriers in the bandwidth allocated to the wake-up signal at intervals. For example, even-numbered subcarriers or odd-numbered subcarriers in the bandwidth of the wake-up signal may be selected.

Wherein the modulation factor of each subcarrier in the plurality of subcarriers is a factor in a fourier series expansion. Further, the coefficient in the fourier series expansion is a real coefficient in the modulation coefficient or an imaginary coefficient in the modulation coefficient, or the coefficient in the fourier series expansion is a modulation coefficient of the first path signal or a modulation coefficient of the second path signal. The first path of signals can be I paths of signals, the second path of signals can be Q paths of signals, or the first path of signals can be Q paths of signals, and the second path of signals can be I paths of signals.

As shown in fig. 6A, fig. 6A is a schematic diagram of an OFDM modulation process. The modulation process is shown in the following formula, where a + bj is the modulation factor, The ∈red is obtained after modulation and sampling>. The coefficients in the fourier series expansion may be the real coefficients a in the modulation coefficients or the imaginary coefficients b in the modulation coefficients. The imaginary coefficient b is 0 if the coefficient in the fourier series expansion is the real coefficient a, and the real coefficient a is 0 if the coefficient in the fourier series expansion is the imaginary coefficient b.

As shown in fig. 6B, fig. 6B is another OFDM modulationSchematic of the process.、/>、……、/>For the modulation factor of the I-path signal, +.>、/>、……、/>For the modulation coefficients of the Q paths of signals, n I paths of signals and n Q paths of signals are modulated respectively and then transmitted to a receiving end through a channel. Wherein (1)>、/>、……、/>Or->、/>、……、/>May be coefficients in a fourier series expansion.

The fourier series expansion is a fourier series expansion of a square wave or a fourier series expansion of a trapezoid wave, or may be a fourier series expansion of other waveforms.

In one implementation, the modulated carrier signal may be generated based on a fourier series expansion of a square wave based on bit information of the OOK signal.

For example, as shown in fig. 7A, fig. 7A is a schematic diagram of a fourier series expansion of a square wave. Square wave in interval [0, T ]The fourier series expansion of (a) is:said->Is a Fourier series, theFor amplitude, n is an integer greater than or equal to 1, t is time, and w= = ->And T is a period.

From the above formula, it can be seen that the fourier series expansion of the square wave is formed by superimposing an infinite number of sinusoidal signals, and the square wave can be theoretically expanded into an infinite number of carriers. The present embodiment selects M carriers, and thus the above fourier series expansion becomes the fourier series expansion as follows:。

wherein M is the number of selected subcarriers, M is an integer greater than or equal to 1, and n is an integer greater than or equal to 1 and less than or equal to M. As can be seen from 2n-1 in the above formula, M subcarriers in the bandwidth allocated to the wake-up signal are selected for modulation by the interval.

Wherein the modulation factor of each subcarrier is*/>。

And the T is the width of the carrier signal, is determined according to the signal quality reported by the terminal equipment, and is configured to the terminal equipment. Further, when the signal quality is greater than a first threshold, the width of the carrier signal is a first width, and when the signal quality is less than or equal to the first threshold, the width of the carrier signal is a second width, wherein the first width is less than the second width. That is, when the signal quality reported by the terminal device is better, a narrower carrier signal can be selected, so that the signal transmission efficiency is improved, and when the signal quality reported by the terminal device is poorer, a wider carrier signal can be selected, so that the signal transmission quality is ensured. The signal quality may include a channel quality indicator (Channel Quality Indicator, CQI) reference signal received power (Reference Signal Receiving Power, RSRP), signal to noise ratio (Signal to Interference plus Noise Ratio, SINR).

Wherein, T is a sampling (Sample) level, a symbol (symbol) level, a Time Slot (Ts) level, or a Time domain resource unit.

Specifically, when the bit information of the OOK signal is 1, the fourier series expansion of the square wave adopted satisfies:. As can be seen from FIG. 7A, the Fourier series expansion is in the interval [0, T]The internal is switched from a high level to a low level. When the bit information of the OOK signal is 0, the fourier series expansion of the square wave adopted satisfies:the Fourier series expansion is in the interval [0, T ]]The internal switch is from low to low. By the above level change, the terminal device can recognize the bit information of the OOK signal.

In another implementation, the modulated carrier signal may be generated based on a fourier series expansion of the trapezoidal wave according to the bit information of the OOK signal.

For example, as shown in fig. 7B, fig. 7B is a schematic diagram of a fourier series expansion of a trapezoidal wave. Trapezoidal wave in interval [0, T]The fourier series expansion of (a) is:said->Is a Fourier series, said->For the rising edge duration or the falling edge duration, said +.>For amplitude, n is an integer greater than or equal to 1, t is time, and w= = - >And T is a period.

From the above formula, the fourier series expansion of the trapezoidal wave is formed by multiplying and superposing an infinite number of sine signals, and the trapezoidal wave can be theoretically expanded into an infinite number of carrier waves. The present embodiment selects only M carriers, and thus the above fourier series expansion becomes the fourier series expansion as follows:。

Wherein the modulation factor of each subcarrier is*/>。

And the T is the width of the carrier signal, is determined according to the signal quality reported by the terminal equipment, and is configured to the terminal equipment. Further, when the signal quality is greater than a first threshold, the width of the carrier signal is a first width, and when the signal quality is less than or equal to the first threshold, the width of the carrier signal is a second width, wherein the first width is less than the second width. That is, when the signal quality reported by the terminal device is better, a narrower carrier signal can be selected, so that the signal transmission efficiency is improved, and when the signal quality reported by the terminal device is poorer, a wider carrier signal can be selected, so that the signal transmission quality is ensured.

Specifically, when the bit information of the OOK signal is 1, the fourier series expansion of the adopted trapezoidal wave satisfies:. As can be seen from FIG. 7B, the Fourier series expansion is in the interval [0, T]The internal is switched from a high level to a low level. When the bit information of the OOK signal is 0, the fourier series expansion of the adopted trapezoidal wave satisfies: />The Fourier series expansion is in the interval [0, T ]]The internal switch is from low to low. Through the above level change, the terminal device can be made to recognize the bit information of the OOK signal.

In another implementation manner, a windowing processing manner may be adopted to generate the modulated carrier signal according to the bit information of the OOK signal.

Specifically, when the bit information of the OOK signal is 1, a windowing process is adopted to intercept the carrier waveform of T/2; when the bit information of the OOK signal is 0, the carrier is not modulated, and the T is a period. That is, the width of the modulated carrier signal is T/2, and the time domain windowing is adopted to remove the carrier waveform of other T/2. The terminal equipment wakes up the terminal equipment based on whether the carrier signal is windowed or not and identifying bit information, so that the power consumption is reduced.

Optionally, the network device sends a modulated carrier signal to the terminal device, where the modulated carrier signal is used to wake up the terminal device to establish a communication connection. For example, as shown in fig. 8, fig. 8 is a schematic diagram of signal processing provided in an embodiment of the present application. Firstly, the network equipment generates a wake-up signal, encodes the wake-up signal, scrambles the wake-up signal, and converts the wake-up signal into bit information of an OOK signal. Then, based on fourier series expansion of square wave or fourier series expansion of trapezoidal wave, m=8 subcarriers in bandwidth allocated to wake-up signal are selected at intervals to modulate, bit information of OOK signal is converted into modulated signals of M carriers, and finally, after fast fourier transform (Inverse Fast Fourier Transform, IFFT) and orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) processing, the modulated signals are sent to terminal equipment.

In the embodiment of the application, the wake-up signal is converted into the bit information of the on-off keying OOK signal, and the modulated carrier signal is generated based on the fourier series expansion according to the bit information of the OOK signal. The terminal equipment only needs to simply detect one bit of information, realizes the wake-up of the terminal equipment, establishes communication connection with the network equipment, reduces the power consumption of signal detection, is compatible with the existing waveform, and avoids interference. And when the terminal equipment does not need to communicate with the network equipment, the main communication unit can be closed by the terminal equipment, so that the power consumption is further reduced.

It will be appreciated that in the various method embodiments described above, the methods and operations implemented by the network device may also be implemented by components (e.g., chips or circuits) available to the network device.

The embodiment of the application may divide the functional modules of the network device according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules described above may be implemented either in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation. The following description will be given by taking an example of dividing each function module into corresponding functions.

The method provided in the embodiment of the present application is described in detail above with reference to fig. 5. The signal generating device provided in the embodiment of the present application is described in detail below with reference to fig. 9. It should be understood that the descriptions of the apparatus embodiments and the descriptions of the method embodiments correspond to each other, and thus, descriptions of details not described may be referred to the above method embodiments, which are not repeated herein for brevity.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a signal generating device according to an embodiment of the present application. The signal generating means may comprise an acquisition module 901, a generation module 902 and a transmission module 903.

The signal generating means may implement steps or procedures performed by the network device in the above method embodiments, for example, may be a terminal device, or a chip or a circuit configured in the network device. The sending module 903 is configured to perform a transceiver-related operation on the network device side in the above method embodiment, and the acquiring module 901 and the generating module 902 are configured to perform a processing-related operation on the network device in the above method embodiment.

The acquiring module 901 is configured to acquire bit information of an on-off keying OOK signal corresponding to a wake-up signal, where the wake-up signal is used to wake-up a terminal device to establish a communication connection;

a generating module 902, configured to generate a modulated carrier signal based on a fourier series expansion according to the bit information of the OOK signal.

Optionally, the generating module 902 is further configured to modulate by selecting a plurality of subcarriers in a bandwidth allocated to the wake-up signal at intervals.

Optionally, the modulation factor of each subcarrier in the plurality of subcarriers is a factor in the fourier series expansion.

Optionally, the fourier series expansion is a fourier series expansion of a square wave or a fourier series expansion of a trapezoidal wave.

Optionally, the coefficient in the fourier series expansion is a real coefficient in the modulation coefficient or an imaginary coefficient in the modulation coefficient, or the coefficient in the fourier series expansion is a modulation coefficient of the first path signal or a modulation coefficient of the second path signal.

Optionally, when the bit information of the OOK signal is 1, the fourier series expansion of the square wave adopted satisfies:the method comprises the steps of carrying out a first treatment on the surface of the When the bit information of the OOK signal is 0, the fourier series expansion of the square wave adopted satisfies: />Wherein, said->Is a Fourier series, said->For the amplitude, M is an integer greater than or equal to 1, n is an integer greater than or equal to 1 and less than or equal to M, t is time, and w= = -is>And T is a period.

Optionally, when the bit information of the OOK signal is 1, the fourier series expansion of the trapezoidal wave adopted satisfies:the method comprises the steps of carrying out a first treatment on the surface of the When the bit information of the OOK signal is 0, the fourier series expansion of the trapezoidal wave adopted satisfies: />Wherein, said- >Is a Fourier series, said->For the rising edge duration or the falling edge duration, said +.>Is the amplitude valueThe M is an integer greater than or equal to 1, the n is an integer greater than or equal to 1 and less than or equal to M, and the w= =>And T is a period.

Optionally, the T is the width of the carrier signal, and the T is determined according to the signal quality reported by the terminal device.

Optionally, when the signal quality is greater than a first threshold, the width of the carrier signal is a first width, and when the signal quality is less than or equal to the first threshold, the width of the carrier signal is a second width, where the first width is less than the second width.

Optionally, the T is a sampling level, a symbol level, a slot level, or a time domain resource unit.

Optionally, the M is the number of selected subcarriers.

Optionally, when the bit information of the OOK signal is 1, a windowing process is adopted to intercept the carrier waveform of T/2; when the bit information of the OOK signal is 0, the carrier is not modulated, and the T is a period.

Optionally, the sending module 903 is configured to send the carrier signal to a terminal device, where the carrier signal is used to wake up the terminal device to establish a communication connection.

It should be noted that, the implementation of each module may also correspond to the corresponding description of the method embodiment shown in fig. 5, and perform the method and the function performed by the network device in the foregoing embodiment.

Fig. 10 is a schematic structural diagram of a network device according to an embodiment of the present application. The network device may be applied to the system shown in fig. 1, to perform the functions of the network device in the above method embodiment, or to implement the steps or flows performed by the network device in the above method embodiment.

As shown in fig. 10, the network device includes a processor 1001 and a transceiver 1002. Optionally, the network device further comprises a memory 1003. Wherein the processor 1001, the transceiver 1002 and the memory 1003 can communicate with each other via an internal connection path, control and/or data signals are transferred, the memory 1003 is used for storing a computer program, and the processor 1001 is used for calling and running the computer program from the memory 1003 to control the transceiver 1002 to transmit and receive signals. Optionally, the network device may further include an antenna, for sending uplink data or uplink control signaling output by the transceiver 1002 through a wireless signal.

The processor 1001 and the memory 1003 may be combined into one processing device, and the processor 1001 is configured to execute program codes stored in the memory 1003 to realize the functions. In particular implementations, the memory 1003 may also be integrated within the processor 1001 or separate from the processor 1001. The processor 1001 may correspond to the processing module in fig. 9.

The transceiver 1002 may correspond to the transmission module in fig. 9, and may also be referred to as a transceiver unit or a transceiver module. The transceiver 1002 may include a receiver (or receiver, receiving circuitry) and a transmitter (or transmitter, transmitting circuitry). Wherein the receiver is for receiving signals and the transmitter is for transmitting signals.

It should be understood that the network device shown in fig. 10 is capable of implementing the various processes involving the network device in the method embodiment shown in fig. 5. The operations and/or functions of the respective modules in the network device are respectively for implementing the corresponding flows in the above-mentioned method embodiments. Reference is specifically made to the description of the above method embodiments, and detailed descriptions are omitted here as appropriate to avoid redundancy.

The above-described processor 1001 may be used to perform the actions described in the previous method embodiments as being implemented internally by the network device, and the transceiver 1002 may be used to perform the actions described in the previous method embodiments as being transmitted to or received from the terminal device by the network device. Please refer to the description of the foregoing method embodiments, and details are not repeated herein.

The processor 1001 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules, and circuits described in connection with this disclosure. The processor 1001 may also be a combination that implements computing functionality, such as a combination comprising one or more microprocessors, a combination of digital signal processors and microprocessors, and so forth. The communication bus 1004 may be a peripheral component interconnect standard PCI bus or an extended industry standard architecture EISA bus or the like. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 10, but not only one bus or one type of bus. Communication bus 1004 is used to enable connected communication between these components. The transceiver 1002 in the embodiment of the present application is configured to perform signaling or data communication with other node devices. The memory 1003 may include volatile memory such as nonvolatile dynamic random access memory (nonvolatile random access memory, NVRAM), phase change RAM (PRAM), magnetoresistive RAM (MRAM), etc., and may also include nonvolatile memory such as at least one magnetic disk storage device, electrically erasable programmable read only memory (electrically erasable programmable read-only memory, EEPROM), flash memory device such as flash memory (NOR flash memory) or flash memory (NAND flash memory), semiconductor device such as Solid State Disk (SSD), etc. The memory 1003 may also optionally be at least one storage device located remotely from the processor 1001. Optionally, a set of computer program code or configuration information may also be stored in memory 1003. Optionally, the processor 1001 may also execute a program stored in the memory 1003. The processor may cooperate with the memory and the transceiver to perform any of the methods and functions of the network device in the embodiments of the application described above.

Embodiments of the present application also provide a chip system, which includes a processor for supporting a network device to implement the functions involved in any of the above embodiments, for example, generating or processing the first message involved in the above method.

In one possible design, the chip system may further include a memory for computer programs and data necessary for the network device. The chip system can be composed of chips, and can also comprise chips and other discrete devices. The input and the output of the chip system correspond to the receiving and sending operations of the network equipment in the method embodiment respectively.

According to the method provided by the embodiment of the application, the application further provides a computer program product, which comprises: a computer program which, when run on a computer, causes the computer to perform the method of any of the embodiments shown in fig. 5.

According to the method provided in the embodiments of the present application, there is further provided a computer readable medium storing a computer program, which when run on a computer causes the computer to perform the method of any one of the embodiments shown in fig. 5.

According to the method provided by the embodiment of the application, the application further provides a communication system, which comprises the one or more terminal devices and the one or more network devices.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of generating a signal, the method comprising:

acquiring bit information of an on-off keying OOK signal corresponding to a wake-up signal, wherein the wake-up signal is used for waking up terminal equipment to establish communication connection;

and generating a modulated carrier signal based on a Fourier series expansion according to the bit information of the OOK signal.

2. The method of claim 1, wherein the method further comprises:

and selecting a plurality of subcarriers in the bandwidth allocated to the wake-up signal through intervals to modulate.

3. The method of claim 2, wherein the modulation factor for each of the plurality of subcarriers is a factor in the fourier series expansion.

4. The method of claim 3, wherein the coefficients in the fourier series expansion are real coefficients in the modulation coefficients or imaginary coefficients in the modulation coefficients, or wherein the coefficients in the fourier series expansion are modulation coefficients of a first path signal or modulation coefficients of a second path signal.

5. The method of any of claims 1-4, wherein the fourier series expansion is a fourier series expansion of a square wave or a fourier series expansion of a trapezoidal wave.

6. The method of claim 5, wherein when the bit information of the OOK signal is 1, a fourier series expansion of the square wave is employed to satisfy:the method comprises the steps of carrying out a first treatment on the surface of the When the bit information of the OOK signal is 0, the fourier series expansion of the square wave adopted satisfies: />Wherein, said->Is a Fourier series, said->For the amplitude, M is an integer greater than or equal to 1, n is an integer greater than or equal to 1 and less than or equal to M, t is time, and w= = -is>And T is a period.

7. The method of claim 5, wherein when bit information of the OOK signal is 1, a fourier series expansion of the trapezoidal wave is employed to satisfy:the method comprises the steps of carrying out a first treatment on the surface of the When (when)When the bit information of the OOK signal is 0, the fourier series expansion of the trapezoidal wave adopted satisfies:wherein, said->Is a Fourier series, said->For the rising edge duration or the falling edge duration, said +.>For the amplitude, M is an integer greater than or equal to 1, n is an integer greater than or equal to 1 and less than or equal to M, and w= = >And T is a period.

8. The method according to claim 6 or 7, wherein T is the width of the carrier signal, and T is determined according to the signal quality reported by the terminal device.

9. The method of claim 8, wherein the carrier signal has a first width when the signal quality is greater than a first threshold and a second width when the signal quality is less than or equal to the first threshold, wherein the first width is less than the second width.

10. The method of claim 8, wherein T is a sample level, a symbol level, a slot level, or a time domain resource unit.

11. The method of claim 6 or 7, wherein M is the number of selected subcarriers.

12. The method of any one of claims 1-4, wherein when the bit information of the OOK signal is 1, a windowing process is used to intercept a carrier waveform of T/2; when the bit information of the OOK signal is 0, the carrier is not modulated, and the T is a period.

13. The method of any one of claims 1-4, wherein the method further comprises:

And sending the carrier signal to the terminal equipment, wherein the carrier signal is used for waking up the terminal equipment to establish communication connection.

14. A signal generating apparatus, the method comprising:

15. The apparatus of claim 14, wherein the device comprises a plurality of sensors,

the generating module is further configured to modulate by selecting a plurality of subcarriers in a bandwidth allocated to the wake-up signal at intervals.

16. The apparatus of claim 15, wherein a modulation coefficient for each of the plurality of subcarriers is a coefficient in the fourier series expansion.

17. The apparatus of claim 16, wherein the coefficients in the fourier series expansion are real coefficients in the modulation coefficients or imaginary coefficients in the modulation coefficients, or wherein the coefficients in the fourier series expansion are modulation coefficients of a first path signal or modulation coefficients of a second path signal.

18. The apparatus of any of claims 14-17, wherein the fourier series expansion is a fourier series expansion of a square wave or a fourier series expansion of a trapezoidal wave.

19. The apparatus of claim 18, wherein a fourier series expansion of the square wave employed satisfies, when bit information of the OOK signal is 1:the method comprises the steps of carrying out a first treatment on the surface of the When the bit information of the OOK signal is 0, the fourier series expansion of the square wave adopted satisfies:wherein, said->Is a Fourier series, said->For the amplitude, M is an integer greater than or equal to 1, n is an integer greater than or equal to 1 and less than or equal to M, t is time, and w= = -is>And T is a period.

20. The apparatus of claim 18, wherein a fourier series expansion of the trapezoidal wave employed satisfies, when bit information of the OOK signal is 1:the method comprises the steps of carrying out a first treatment on the surface of the When the bit information of the OOK signal is 0, the fourier series expansion of the trapezoidal wave adopted satisfies:wherein, said->Is a Fourier series, said->For the rising edge duration or the falling edge duration, said +.>For the amplitude, M is an integer greater than or equal to 1, n is an integer greater than or equal to 1 and less than or equal to M, and w= = >And T is a period.

21. The apparatus according to claim 19 or 20, wherein T is the width of the carrier signal, and T is determined according to the signal quality reported by the terminal device.

22. The apparatus of claim 21, wherein the carrier signal has a first width when the signal quality is greater than a first threshold and a second width when the signal quality is less than or equal to the first threshold, wherein the first width is less than the second width.

23. The apparatus of claim 21, wherein T is a sampling level, a symbol level, a slot level, or a time domain resource unit.

24. The apparatus of claim 19 or 20, wherein M is the number of selected subcarriers.

25. The apparatus of any one of claims 14-17, wherein when the OOK signal has bit information of 1, a windowing process is used to intercept a carrier waveform of T/2; when the bit information of the OOK signal is 0, the carrier is not modulated, and the T is a period.

26. The apparatus of any one of claims 14 to 17,

And the sending module is used for sending the carrier signal to the terminal equipment, wherein the carrier signal is used for waking up the terminal equipment to establish communication connection.

27. A signal generating device comprising a memory for storing a computer program and a processor that runs the computer program to cause the signal generating device to perform the method of any of claims 1-13.

28. A computer readable storage medium, characterized in that the computer readable storage medium comprises a computer program which, when run by a processor, causes the method according to any one of claims 1-13 to be implemented.

29. A chip comprising a processor for communicating with an external device or an internal device and a communication interface for implementing the method of any of claims 1-13.