ELECTRONIC DEVICE, METHOD, AND COMPUTER READABLE STORAGE MEDIUM FOR OBTAINING INFORMATION RELATED TO EXTERNAL OBJECT

An electronic device includes an ultra-wide band (UWB) circuit, and at least one processor comprising a controller of UWB circuit. The at least one processor is configured to transmit, through UWB circuit operating in a first mode, a first signal for a first field in a first frame, transmit, through UWB circuit operating in the first mode, a second signal including designated information for a second field in the first frame, receive, through UWB circuit operating in the first mode, a first reflected signal related to the first signal and a second reflected signal related to the second signal, respectively, caused by an external object, according to a state of the designated information identified from the second reflected signal, obtain information on the external object based on the first reflected signal or transmit a second frame through UWB circuit operating in a second mode.

BACKGROUND

The disclosure relates to an electronic device, a method, and a computer-readable storage medium for obtaining information on an external object.

2. Description of Related Art

Ultra-wide band (UWB) communication technology may be used to obtain information on an external object through an electronic device. UWB communication technology may measure more accurate distance and angle when compared to radio access technology (RAT), which is distinct from UWB communication. In addition, the electronic device may obtain biometric information of the user of the electronic device through the UWB signal. For example, the electronic device may monitor the user's bio-signal through the UWB signal.

SUMMARY

An electronic device may transmit a signal to obtain information on an external object and receive a reflected signal. In a designated space, a plurality of electronic devices may transmit at least a plurality of signals to obtain information on an external object, and receive a plurality of reflected signals for the plurality of signals. Interference between the plurality of signals may occur.

The electronic device according to various embodiments may obtain information on an external object by avoiding interference between the plurality of signals.

The technical problems to be achieved in this document are not limited to those described above, and other technical problems not mentioned herein will be clearly understood by those having ordinary knowledge in the art to which the present disclosure belongs, from the following description.

According to an embodiment, an electronic device may comprise an ultra-wide band (UWB) circuit, at least one processor comprising a controller of UWB circuit, the at least one processor may be configured to: transmit, through the UWB circuit operating in a first mode, a first signal for a first field in a first frame; transmit, through the UWB circuit operating in the first mode, a second signal including designated information for a second field in the first frame, that is distinct from the first signal; receive, through the UWB circuit operating in the first mode, a first reflected signal related to the first signal and a second reflected signal related to the second signal, respectively, caused by an external object; according to a state of the designated information identified from the second reflected signal, obtain information on the external object based on the first reflected signal or transmit a second frame through the UWB circuit operating in a second mode switched from the first mode.

According to an embodiment, a method of an electronic device may comprise transmitting, through an UWB circuit operating in a first mode, a first signal for a first field in a first frame; transmitting, through the UWB circuit operating in the first mode, a second signal including designated information for a second field in the first frame, that is distinct from the first signal; receiving, through the UWB circuit operating in the first mode, a first reflected signal related to the first signal and a second reflected signal related to the second signal, respectively, caused by an external object; according to a state of the designated information identified from the second reflected signal, obtaining information on the external object based on the first reflected signal or transmit a second frame through the UWB circuit operating in a second mode switched from the first mode.

According to an embodiment, a computer readable storage medium may store one or more programs, the one or more programs including one or more instructions causing, when the electronic device to transmit, through an UWB circuit operating in a first mode, a first signal for a first field in a first frame, transmit, through the UWB circuit operating in the first mode, a second signal including designated information for a second field in the first frame, that is distinct from the first signal, receive, through the UWB circuit operating in the first mode, a first reflected signal related to the first signal and a second reflected signal related to the second signal, respectively, caused by an external object, according to a state of the designated information identified from the second reflected signal, obtain information on the external object based on the first reflected signal or transmit a second frame through the UWB circuit operating in a second mode switched from the first mode.

The effects that can be obtained from the present disclosure are not limited to those described above, and any other effects not mentioned herein will be clearly understood by those having ordinary knowledge in the art to which the present disclosure belongs, from the following description.

DETAILED DESCRIPTION

The electronic device according to one or more embodiments may transmit a first signal for the first field and a second signal for the second field. The electronic device may receive a first reflective signal for the first signal and a second reflective signal for the second signal. The electronic device may obtain information on an external object based on the first reflected signal according to a state of the designated information identified from the second reflected signal. The electronic device may avoid interference with the external signal transmitted from the external electronic device by identifying the state of the designated information identified from the second reflected signal.

FIG.1is a block diagram of an electronic device in a network environment according to various embodiments.

According to an embodiment, the processor (e.g., the processor120ofFIG.1) of the electronic device (e.g., the electronic device101ofFIG.1) may obtain information on an external object through a UWB signal (or frame). The processor may obtain information on an external object by transmitting a UWB signal and identifying a reflected signal for the UWB signal.

When the processor identifies a reflected signal for the UWB signal, the processor may receive another UWB signal transmitted from an external electronic device. According to an embodiment, the processor may distinguish between a reflected signal for the UWB signal transmitted by the processor and another UWB signal transmitted from an external electronic device by transmitting additional fields to the transmitted UWB signal.

An operation of a specific electronic device (or a processor of the electronic device) for the above-described embodiment may be described below. The electronic device described below may correspond to the electronic device101ofFIG.1. An external electronic device (or a plurality of external electronic devices) to be described below may correspond to the electronic device102ofFIG.1.

FIG.2is a simplified block diagram of an electronic device according to various embodiments.

Referring toFIG.2, the electronic device101ofFIG.2may correspond to the electronic device101ofFIG.1. The electronic device101may comprise a processor120, a UWB circuit210, and/or an output device220. According to an embodiment, the electronic device101may include at least one of a processor120, a UWB circuit210, and an output device220. For example, at least some of the processor120, the UWB circuit210, and the output device220may be omitted in the electronic device101.

According to an embodiment, the processor120may control the UWB circuit210and the output device220. The UWB circuit210and the output device220may be controlled by the processor120. For example, the processor120may transmit a UWB signal and receive the UWB signal through the UWB circuit210. For example, the processor120may provide a notification to the user of the electronic device101through the output device220.

The UWB circuit210may correspond to at least a part of the communication module190ofFIG.1. The UWB circuit210may be used for UWB communication. For example, the UWB circuit210may be used to transmit and/or receive a UWB signal. UWB communication may refer to a communication method that transmits information at low power by using a frequency band of a wider band than other communication methods.

According to an embodiment, the processor120may include at least a portion of the UWB circuit210. For example, the processor120may include a controller (e.g., a micro controller unit (MCU) of the UWB circuit210. The control unit of the UWB circuit210included in the processor120may operate independently of other components of the processor120. For example, the processor120may transmit and/or receive a UWB signal. The control unit of the UWB circuit in the processor120may transmit and/or receive the UWB signal.

For example, the UWB signal may be transmitted and/or received through at least one of a plurality of channels. A plurality of channels may be variously set within a designated band. For example, a designated band and/or a plurality of channels may be set differently for each country and may be switched. For example, the designated band may be set to a band of 6.25 GHz to 8.25 GHz.

For example, the designated band may be divided into three groups based on the frequency band. Each group may include at least one channel. For example, the first group may be referred to as a sub-GHz band. The second group may be referred to as a low band. The third group may be referred to as a high band. For example, the first group may include a first channel (or channel 0). The second group may include second to fifth channels (or channels 1 to 4). The third group may include sixth to sixteenth channels (or channels 5 to 15).

The UWB signal may be configured as a pulse waveform. For example, a pulse period constituting the UWB signal may be set to 2 nanoseconds (ns). For example, the bandwidth of the UWB signal may be set to 500 MHz. However, this is not limited thereto. The UWB signal may be configured in various waveforms (e.g., a sine waveform), and the period and/or bandwidth of the UWB signal may be configured differently from the above-described example.

The UWB circuit210may include at least one antenna. At least one antenna may be configured as a directional antenna or a non-directional antenna (e.g., omnidirectional antenna).

For example, at least one antenna may be set to two. The at least one antenna may include a first antenna and a second antenna. The first antenna and the second antenna may be configured as a non-directional antenna. The first antenna may be used for transmitting a UWB signal. The second antenna may be used to receive a UWB signal. Transmission of the UWB signal and reception of the UWB signal may be performed independently. For example, the processor120may transmit a UWB signal while receiving the UWB signal through the UWB circuit210. As another example, the processor120may receive the UWB signal while transmitting the UWB signal through the UWB circuit210.

According to an embodiment, the UWB circuit210may be used to obtain biometric information of a user of the electronic device101. For example, the processor120may monitor the user's non-contact biometric signal of the electronic device101through the UWB circuit210. The processor120may transmit the UWB signal through the UWB circuit and receive the UWB signal reflected from the user of the electronic device101. The processor120may obtain information on a channel impulse response (CIR) based on the reflected UWB signal. The processor120may obtain biometric information of the user of the electronic device101based on the information on the channel impulse response. For example, the biometric information may include information on breathing or heart rate. The processor120may obtain information on the movement of the user's chest of the electronic device101using the UWB signal. The processor120may obtain information on breathing or heart rate based on the movement of the user's chest of the electronic device101.

Alternatively or additionally, the output device220may be used to provide a notification to a user of the electronic device101. The output device220may be configured in various ways.

For example, the output device220may include the sound output module155ofFIG.1. The processor120may obtain information on an external object through the UWB circuit210and provide a notification to a user of the electronic device101through sound based on the obtained information on the external object.

As another example, the output device220may include the display module160ofFIG.1. The processor120may obtain information on an external object through the UWB circuit210and provide a notification to a user of the electronic device101through a screen based on the obtained information on the external object.

FIG.3Aillustrates an example of a frame constituting a UWB signal.

Referring toFIG.3A, the frame300-1may include a preamble310, a start of frame delimiter320(hereinafter, SFD320), a scrambled timestamp sequence330(hereinafter, STS330), a PHY header340(hereinafter, PHR340), and a DATA350. The frame300-1may be used to transmit and receive data through UWB communication. For example, the frame300-1may be transmitted and received through the UWB circuit210of the electronic device101.

For example, the preamble310and the SFD320may be referred to as SYNC360. For example, the SYNC360may be used for time synchronization for communication with an external electronic device. As another example, the preamble310may include information for recognizing that the signal received by the electronic device or the external electronic device is a UWB signal. The SFD320may be used to indicate the end of the SYNC360. The SFD320may include information indicating that the end of the SYNC360. The SFD320may include information for indicating an end point of the SYNC360. According to an embodiment, the SYNC360may be configured to include only the preamble310except for the SFD320.

For example, the preamble310and the SFD320may be configured based on symbols. Each of the preamble310and the SFD320may consist of a plurality of symbols. A symbol constituting a plurality of symbols may be configured based on a code sequence. The symbol may be configured based on a code sequence of one of a plurality of code sequences. According to an embodiment, a plurality of code indexes corresponding to each of a plurality of code sequences may be set. For example, the symbol may be configured based on a code sequence corresponding to the code index9.

For example, the SFD320may be configured based on a sequence related to an arrangement of a plurality of symbols. An example of the sequence may be defined as Equation 1.

Referring to Equation 1, the SFD320may consist of eight symbols. The SFD320may be configured based on a sequence defined in Equation 1. The sequence may consist of 8 bits. The SFD320configured based on the sequence defined in Equation 1 may be set to [0 S 0 −S S 0 0 −S]. S may mean one symbol. The sequence is exemplary, and SFD320may be configured based on various sequences. For example, the sequence may be configured based on a code sequence consisting of 64 bits.

For example, the STS330may be used for channel estimation, gain control, and/or security. The PHR340may include information on parameters of the physical layer of the DATA350. The DATA350may include a payload.

FIG.3Billustrates another example of a frame constituting a UWB signal.

Referring toFIG.3B, the frame300-2may be configured SYNC390. For example, the SYNC390may correspond to the SYNC360ofFIG.3A. The frame300-2may not be used to transmit and receive data. For example, the frame300-2may be transmitted to identify a reflected signal by an external object. For example, the frame300-2may be transmitted by the processor120of the electronic device101. The frame300-2may be reflected by an external object and received by the processor120.

According to an embodiment, the processor120may transmit the frame300-2through the first signal. The processor120may receive a reflected signal for the first signal reflected by the external object. The processor120may obtain information on an external object based on the reflected signal. For example, the processor120may identify information on movement of an external object by identifying a Doppler frequency of the reflected signal. For example, the processor120may receive the reflected signal through different antennas. The processor120may obtain information on a direction in which an external object is located based on a phase difference of the reflected signals received through different antennas. For example, the processor120may obtain information on a distance between the external object and the electronic device101based on a timing of transmitting the first signal and a timing of receiving a reflected signal for the first signal.

According to an embodiment, the processor120of the electronic device101may obtain information on an external object by transmitting a UWB signal and receiving a reflected signal for the UWB signal. In addition, an external electronic device (e.g., the electronic device104ofFIG.1) distinguished from the electronic device101may also obtain information on an external object by transmitting a UWB signal and receiving a reflected signal for the UWB signal. Accordingly, a collision between the UWB signal transmitted by the electronic device101and the UWB signal transmitted by the external electronic device may occur. An example in which a collision between UWB signals occurs may be described with reference toFIG.4.

FIG.4illustrates an example in which a collision occurs between UWB signals according to various embodiments.

Referring toFIG.4, the electronic device101may transmit the first UWB signal410based on the first period411. The external electronic device401may transmit the second UWB signal420based on the second period421.

For example, the first period411and the second period421may be set differently from each other. The first UWB signal410and the second UWB signal420may collide at each period corresponding to the lowest common multiple (LCM) of the first period411and the second period421.

For another example, the first period411and the second period421may be set to be the same. Transmission timings of the first UWB signal410and the second UWB signal420may be set differently from each other. When the electronic device101transmits the first UWB signal410based on the first period411, a time error may occur. In addition, even when the external electronic device401transmits the second UWB signal420based on the second period421, a time error may occur. For example, the electronic device101and the external electronic device401may use their own clock. A unique error (e.g., skew or offset) may occur in each clock. When an error occurs in the first period411and the second period421, a collision between the first UWB signal410and the second UWB signal420may occur.

As in the above examples, when the first UWB signal410and the second UWB signal420transmitted by the electronic device101are transmitted at different timings based on the same period, a collision may occur within a long time interval.

Hereinafter, a frame for preventing (or detecting) collision between UWB signals transmitted from different electronic devices and an operation of the processor120of the electronic device101transmitting the frame may be described.

FIG.5is a flowchart illustrating an operation of an electronic device according to various embodiments. This method may be executed by the electronic device101illustrated inFIG.2and the processor120of the electronic device101.

In operation510, the processor120may transmit a first signal for the first field in the first frame through a UWB circuit operating in the first mode.

The first frame may include a plurality of fields. For example, the first frame may include a first field and a second field. The first field may be used to obtain information on an external object. The second field may be used to prevent (or detect) collision of signals. For example, the first field in the first frame may correspond to SYNC390ofFIG.3B.

Alternatively or additionally, the processor120may transmit a first signal for the first field in the first frame. The processor120may transmit a first signal for the first field in the first frame to obtain information on the external object based on the first reflected signal for the first signal.

For example, the first frame may be transmitted through one signal. The first signal may refer to a part (or signal) transmitted within a first time interval among the one signal. The second signal may refer to a part (or signal) transmitted within a second time interval among the one signal. For example, the first signal may refer to a signal in a time interval in which a first field in the first frame is transmitted. The second signal may refer to a signal in a time interval in which a second field in the first frame is transmitted. As another example, the first frame may be transmitted through a plurality of signals. The first frame may be transmitted through a first signal and a second signal that are distinguished from each other.

For example, the first signal may include a UWB signal for transmitting the first field. For example, the first signal may refer to a signal transmitted by modulating the first field. For example, the first signal may be used to transmit at least one symbol for the first field.

The UWB circuit may operate in the first mode. For example, the processor120may transmit a first signal through a UWB circuit operating in the first mode. For example, the processor120may transmit the first frame based on the first period while the operation mode of the UWB circuit is the first mode. As another example, the processor120may transmit the first frame through the first channel while the operation mode of the UWB circuit is the first mode. As another example, the processor120may transmit the first frame based on the first offset while the operation mode of the UWB circuit is the first mode.

In operation520, the processor120may transmit a second signal for the second field in the first frame including the designated information through the UWB circuit operating in the first mode. For example, the processor120may transmit a first field in the first frame through a first signal, and transmit the remaining second fields in the first frame through a second signal.

The second signal for the second field in the first frame may include designated information. The designated information may include information on the electronic device101.

According to an embodiment, the designated information may include unique identification information of the electronic device101. For example, the designated information may include a unique identification number (UID).

According to an embodiment, the designated information may include information on a designated sequence. For example, the second field may be configured as a SFD field. The SFD field may be configured based on a designated sequence. At least some of the first fields may be configured based on the first sequence. The second field may be configured based on the second sequence. The second sequence for configuring the second field may be distinguished from the first sequence for configuring at least some of the first fields.

For example, the first field may include a first SFD field. The first SFD field may be configured based on the first sequence. The second field may be configured a second SFD field. The second SFD field may be configured based on the second sequence.

According to an embodiment, the processor120may bypass an operation for measuring a channel state before performing operations510and520. The processor120may skip an operation for measuring a channel state. The processor120may transmit a first signal (or a first signal and a second signal) instead of an operation for measuring a channel state. The processor120may prevent (or detect) a collision based on the second field. Accordingly, the processor120may transmit the first signal (or the first signal and the second signal) regardless of whether the channel state is a busy state or an idle state.

According to an embodiment, the processor120may transmit the second signal through the UWB circuit operating in the first mode after a designated time interval elapses from the timing at which the first signal is transmitted.

According to an embodiment, the processor120may transmit the second signal through a UWB circuit operating in the first mode immediately after the first signal is transmitted.

In operation530, the processor120may receive a first reflected signal for a first signal and a second reflected signal for a second signal caused by an external object through the UWB circuit operating in the first mode.

For example, the processor120may receive one reflected signal for the first frame transmitted through one signal. The first reflected signal may refer to a part (or signal) received within the third period among the one reflected signals. The second reflected signal may refer to a part (or signal) received within a fourth time interval among the one reflected signal. For example, the first reflected signal may refer to a signal within a time interval in which a first field of the first frame is reflected and received. The second reflected signal may refer to a signal within a time interval in which the second field of the first frame is reflected and received.

For example, the processor120may receive one reflected signal for one signal for transmitting the first frame. The processor120may divide the one reflected signal into a part received within a third time interval and a part received within a fourth time interval. The processor120may identify the part received within the third time interval as the first reflected signal. The processor120may identify the part received within the fourth time interval as the second reflected signal.

For example, the processor120may divide and transmit a signal for the first frame. The processor120may divide the first frame into a first signal and a second signal and transmit the first frame. The processor120may receive a first reflected signal for the first signal and a second reflected signal for the second signal, respectively.

The first reflected signal for the first signal and the second reflected signal for the second signal may be caused by an external object. For example, the first signal and the second signal may be reflected by an external object. The first signal and the second signal may be reflected by the external object and received by the processor120as the first reflected signal and the second reflected signal, respectively.

The first reflected signal may be configured differently from the first signal. For example, the first reflected signal may further include noise (e.g., additive white gaussian noise (AWGN)) in the first signal. The second reflected signal may be configured differently from the second signal. For example, the second reflected signal may further include noise in the second signal.

In operation540, the processor120may obtain information on the external object based on the first reflected signal or transmit the second frame through the UWB circuit operating in the second mode switched from the first mode according to the state of the designated information. For example, when the UWB circuit operates in the second mode, the processor120may transmit a second frame distinguished from the first frame. For another example, when the UWB circuit operates in the second mode, the processor120may transmit the second frame based on a period distinguished from a period in which the first frame is transmitted.

According to an embodiment, the processor120may identify a state of designated information identified from the second reflected signal.

The processor120may identify whether the designated information identified from the second reflected signal is in the same state as the designated information set when the second signal is transmitted. The processor120may identify whether the designated information identified from the second reflected signal is the same as the designated information set when the second signal is transmitted.

According to an embodiment, the processor120may identify that the state of the designated information identified from the second reflected signal is the first state. For example, the first state may be a state in which the state of the designated information set when the second signal is transmitted is the same as the state of the designated information identified from the second reflected signal. For example, the first state may be a state in which designated information set when the second signal is transmitted corresponds to designated information identified from the second reflected signal. For example, in the first state, the designated information identified from the second reflected signal may correspond to the designated information included in the second signal. The processor120may obtain information on an external object through information on a channel impulse response obtained from the first reflected signal, based on the state of the designated information identified from the second reflected signal being the first state.

For example, the processor120may identify that the designated information identified from the second reflected signal is the same state as the designated information set when the second signal is transmitted. The processor120may obtain information on a channel impulse response based on the designated information identified from the second reflected signal being in the same state as the designated information set when the second signal is transmitted. The processor120may obtain information on an external object based on the information on the channel impulse response.

According to an embodiment, the processor120may obtain information on a channel impulse response from the first reflected signal in response to receiving the first reflected signal. The processor120may identify whether information on the channel impulse response obtained from the first reflected signal is used according to the state of the designated information. The processor120may identify whether to obtain information on the external object based on the information on the channel impulse response obtained from the first reflected signal according to the state of the designated information.

According to an embodiment, the processor120may obtain information on a channel impulse response from the first reflected signal in response to receiving the first reflected signal. In addition, the processor120may obtain information on an external object based on the information on the channel impulse response obtained from the first reflected signal. The processor120may identify whether to use information on an external object according to a state of the designated information.

According to an embodiment, the processor120may store the first reflected signal in response to receiving the first reflected signal. Processor120may identify whether to obtain information on the channel impulse response from the first reflected signal according to the state of the designated information.

According to an embodiment, the processor120may transmit (or deliver) information on the channel impulse response to an upper layer (e.g., an application layer). According to an embodiment, the processor120may transmit (or deliver) information on the external object obtained based on the information on the channel impulse response to the upper layer.

For example, the information on the external object may include at least one of information on the shape of the external object, information on the location of the external object, and information on the movement of the external object. According to an embodiment, the information on the external object may include biometric information of the user of the electronic device101, which is the external object.

Alternatively or additionally, the processor120may identify that the designated information identified from the second reflected signal is different from the designated information set when the second signal is transmitted. According to an embodiment, the processor120may identify that the state of the designated information identified from the second reflected signal is the second state. For example, the second state may be a state in which the state of the designated information set when the second signal is transmitted is different from the state of the designated information identified from the second reflected signal. For example, the second state may be a state in which designated information set when the second signal is transmitted and designated information identified from the second reflected signal are distinguished. The processor120may bypass the acquisition of information on an external object based on the state of the designated information identified from the second reflected signal being the second state. The processor120may skip the acquisition of information on an external object based on the state of the designated information identified from the second reflected signal being the second state. The processor120may not acquire information on an external object based on the state of the designated information identified from the second reflected signal being the second state.

The processor120may switch the operation mode of the UWB circuit from the first mode to the second mode. The processor120may transmit the second frame through the UWB circuit operating in the second mode switched from the first mode. Instead of acquiring information on an external object, based on the state of the designated information identified from the second reflected signal being the second state, the processor120may transmit the second frame after changing the operation mode of the UWB circuit from the first mode to the second mode.

Alternatively or additionally, the processor120may receive the first reflected signal before the second reflected signal. The processor120may store information on the first reflected signal in the memory (e.g., the memory130ofFIG.1). The information on the first reflected signal may include information on a channel impulse response obtained from the first reflected signal. After storing information on the first reflected signal, the processor120may decode the second reflected signal. The processor120may identify designated information based on decoding the second reflected signal. The processor120may identify a state of the designated information. The processor120may discard information on the stored first reflected signal based on the state of the designated information being the second state.

According to an embodiment, the processor120may transmit (or deliver) information regarding that the state of the designated information is identified as the second state to an upper layer (e.g., an application layer).

Alternatively or additionally, the processor120may switch the operation mode of the UWB circuit from the first mode to the second mode. According to an embodiment, the second mode may be set to be different from the first mode in at least one of a transmission period, a transmission offset, a transmission channel, or a code sequence.

For example, in a state in which the operation mode of the UWB is the first mode, the processor120may transmit the first frame based on the first period. After changing the operation mode of the UWB circuit from the first mode to the second mode, the processor120may transmit the second frame based on the second period. The processor120may transmit the second frame based on a second period distinguished from the first period through the UWB circuit operating in the second mode switched from the first mode. The processor120may transmit the first frame and the second frame based on different periods.

For another example, the processor120may transmit the first frame every first period based on the first offset in a state in which the operation mode of the UWB circuit is the first mode. After switching the operation mode of the UWB circuit from the first mode to the second mode, the processor120may transmit the second frame every first period based on the second offset distinguished from the first offset. The processor120may transmit the second frame every first period based on the second offset distinguished from the first offset through the UWB circuit operating in the second mode switched from the first mode.

As another example, the processor120may transmit the first frame through the first channel while the operation mode of the UWB is the first mode. After switching the operation mode of the UWB circuit from the first mode to the second mode, the processor120may transmit the second frame through a second channel distinguished from the first channel. The processor120may transmit the second frame through a second channel distinguished from the first channel through the UWB circuit operating in the second mode changed from the first mode.

As another example, in a state in which the operation mode of the UWB circuit is the first mode, the processor120may configure the first field based on a plurality of symbols. Each of the plurality of symbols may be configured based on a first code sequence. When the operation mode of the UWB circuit is in the second mode, the processor120may configure the second frame as a third field and a fourth field. The third field may be configured based on a plurality of symbols. Each of a plurality of symbols for configuring the third field may be configured based on a second code sequence.

According to an embodiment, the second frame may include a first field and a third field. For example, the third field may be configured based on a fourth sequence distinguished from a second sequence for configuring the second field. Both the first frame and the second frame may include a first field. The second field in the first frame and the third field in the second frame may be configured differently from each other.

FIG.6Aillustrates an example of a frame according to various embodiments.

Referring toFIG.6A, the frame610may be transmitted and received by the processor120of the electronic device101. The frame610may include a radar frame611and a conflict frame612(hereinafter, CDF612). The radar frame611may be an example of the first field ofFIG.5. The CDF612may be an example of the second field ofFIG.5.

For example, the processor120may transmit the frame610through one signal. The one signal may be divided into a first signal and a second signal according to a time interval. The one signal may be divided according to each time interval for transmitting each of the radar frame611and the CDF612of the frame610. For example, the one signal may be divided into a first signal for the radio frame611and a second signal for the CDF612. The first signal may be transmitted within the first time interval. The second signal may be transmitted within the second time interval. The processor120may receive one reflected signal for one signal for transmitting the frame610. The one reflected signal may be divided into a first reflected signal and a second reflected signal according to a time interval. For example, the processor120may distinguish the one reflective signal into a first reflective signal and a second reflective signal for a second reflected signal.

For example, the radar frame611may be used to obtain information on an external object. The processor120may transmit a first signal for the radar frame611. The processor120may obtain information on an external object based on the first reflected signal for the first signal.

The CDF612may include designated information. The processor120may transmit a second signal for the CDF612. The processor120may identify a state of the designated information based on the second reflected signal for the second signal. The processor120may identify that the second signal transmitted from the electronic device101is reflected and received based on the CDF612. The processor120may identify that the second signal transmitted from the electronic device101is reflected and received based on the CDF612.

FIG.6Billustrates another example of a frame according to various embodiments.

Referring toFIG.6B, the frame620may be transmitted and received by the processor120of the electronic device101. The frame620may include a SYNC621and an SFD622. The SYNC621may be an example of the first field ofFIG.5. The SYNC621may be an example of the radar frame611ofFIG.6A. The SFD622may be an example of the second field ofFIG.5. The SYNC621may correspond to the SYNC390illustrated inFIG.3B. The SFD622may be an example of the CDF612ofFIG.6A.

The processor120may transmit a first signal to the SYNC621and receive a first reflected signal to the first signal. The processor120may transmit a second signal to the SFD622and receive a second reflected signal to the second signal.

Although not shown, the SYNC621may include an SFD (or SFD field) distinguished from the SFD622. The SFD included in the SYNC621may be configured based on the first sequence. The SFD622may be configured based on the second sequence. The first sequence and the second sequence may be configured independently. The processor120may independently configure the first sequence and the second sequence. For example, the processor120may configure the first sequence and the second sequence differently from each other. For another example, the processor120may configure the first sequence and the second sequence to be identical. For example, the first sequence may be set based on a standard (e.g., 802.15.4 standard). The second sequence may be set by the processor120regardless of the standard.

For example, each of the first sequence and the second sequence may be set to one of 4 bits, 8 bits, 16 bits, 32 bits, or 64 bits. For example, the first sequence may be set to 8 bits and the second sequence may be set to 8 bits. As another example, the first sequence may be set to 8 bits and the second sequence may be set to 64 bits. As another example, the first sequence may be set to 64 bits and the second sequence may be set to 8 bits. As another example, the first sequence may be set to 64 bits and the second sequence may be set to 64 bits.

Alternatively or additionally, the SFD622may include designated information. The SFD622may include information on the second sequence. The processor120may receive a second reflected signal of the second signal for the SFD622. The processor120may identify the third sequence based on the second reflected signal. The processor120may identify a state of designated information identified from the second reflected signal based on the second sequence and the third sequence. For example, the processor120may identify whether the identified third sequence is the same as the second sequence based on the second reflected signal. For example, the processor120may identify the state of the designated information as the first state based on the third sequence identified based on the second reflected signal being the same as the second sequence. As another example, the processor120may identify the state of the designated information as the second state based on the third sequence identified based on the second reflected signal being different from the second sequence.

FIG.6Cillustrates another example of a frame according to various embodiments.

Referring toFIG.6C, the frame630may be transmitted and received by the processor120of the electronic device101. The frame630may include a SYNC631and a UID632. The SYNC631may be an example of the first field ofFIG.5. The SYNC631may be an example of the radar frame611ofFIG.6A. The UID632may be an example of the second field ofFIG.5. The SYNC631may correspond to the SYNC390illustrated inFIG.3B. The UID632may be an example of the CDF612ofFIG.6A.

The processor120may transmit a first signal to the SYNC631and receive a first reflected signal to the first signal. The processor120may transmit a second signal to the UID632and receive a second reflected signal to the second signal.

For example, the UID632may include unique identification information for the electronic device101. The processor120may identify a state of the designated information based on unique identification information for the electronic device101set at the time of transmitting the second signal and unique identification information identified through the second reflected signal. For example, the processor120may identify the state of the designated information as the first state based on the unique identification information for the electronic device101set when the second signal is transmitted and the unique identification information identified through the second reflected signal being the same. As another example, the processor120may identify the state of the designated information as the second state based on the unique identification information for the electronic device101set when the second signal is transmitted and the unique identification information identified through the second reflected signal being different from each other.

FIG.7Aillustrates another example of a frame according to various embodiments.

FIG.7Billustrates another example of a frame according to various embodiments.

FIG.7Cillustrates another example of a frame according to various embodiments.

FIG.7Dillustrates another example of a frame according to various embodiments.

The frames710,720,730, and740shown inFIGS.7A,7B,7C,7D, respectively, may be transmitted and/or received by the processor120of the electronic device101.

Referring toFIG.7B, the frame720may include a radar frame701and a CDF702. The processor120may transmit the radar frame701. The processor120may transmit the CDF702after a designated time interval elapses from the timing at which the radar frame701is transmitted. For example, the designated time interval may be set to 1 microsecond (μs).

Referring toFIG.7C, the frame730may include a radar frame701and a CDF702. The processor120may transmit the CDF702. The processor120may transmit the radio frame701immediately after transmitting the CDF702. The radar frame701may be followed by the CDF702. The radar frame701may be transmitted after the CDF702is transmitted.

Referring toFIG.7D, the frame740may include a radar frame701and a CDF702. The processor120may transmit the CDF702. The processor120may transmit the radio frame701after a designated time interval elapses from the timing at which the CDF702is transmitted. For example, the designated time interval may be set to 1 is.

FIG.8Aillustrates an example of a reflected signal received by an electronic device according to various embodiments.

FIG.8Billustrates an example of a reflected signal received by an electronic device according to various embodiments.

FIG.8Cillustrates an example of a reflected signal received by an electronic device according to various embodiments.

Referring toFIGS.8A to8C, an example of a reflected signal received from the processor120of the electronic device101is illustrated. The horizontal axis of the graphs ofFIGS.8A to8Crepresents time. A vertical axis of the graphs ofFIGS.8A to8Crepresents a magnitude.

The processor120may transmit the first frame through one signal. One signal for transmitting the first frame may be divided into a first signal for the first field and a second signal for the second field. For example, the processor120may transmit a first signal for a first field in the first frame and a second signal for a second field in the first frame.

The processor120may receive one reflected signal for the one signal. The one reflected signal may be divided into a first reflected signal for a first signal and a second reflected signal for a second signal. For example, the processor120may receive a first reflected signal for the first signal and a second reflected signal for the second signal. Graphs ofFIGS.8A to8Cmay be examples of the first reflected signal and the second reflected signal received by the processor120.

Referring toFIG.8A, the processor120may transmit a first signal for a first field in the first frame and a second signal for a second field in the first frame. The processor120may set the second field as SFD. The processor120may configure the SFD based on a designated sequence. The processor120may set the designated sequence to [0, 1, 0, −1, 1, 0, 0, −1]. The processor120may sequentially receive a first reflected signal for the first signal and a second reflected signal for the second signal. The processor120may receive noise (e.g., AWGN) together with the first reflected signal and the second reflected signal. The processor120may receive the first reflected signal and the second reflected signal in a state in which interference from an external signal transmitted from another electronic device does not exist.

The processor120may receive the first reflected signal in the time interval811. The processor120may receive the second reflected signal in the time interval812. The processor120may identify a sequence based on the second reflected signal. For example, the processor120may identify the sequence based on the magnitude of the second reflected signal received within the time interval812. In a state in which interference of an external signal transmitted from another electronic device does not exist, the processor120may identify a sequence identified based on the magnitude of the second reflected signal as [0, 1, 0, 0, 0]. The processor120may identify that the identified sequence is the same based on the magnitude of the second reflected signal as the designated sequence for configuring the second signal. The processor120may identify that the state of the designated information identified from the second reflected signal is the first state. The processor120may obtain information on an external object based on the state of the designated information identified from the second reflected signal being the first state.

Referring toFIG.8B, the processor120may transmit a first signal for a first field in the first frame and a second signal for a second field in the first frame. The processor120may set the first field to SYNC. The processor120may set the second field as SFD. The processor120may configure the SYNC and the SFD based on a designated code sequence. The processor120may configure an arrangement of a plurality of symbols constituting the SFD based on a designated sequence. For example, the code sequence and the designated sequence may be distinguished. The code sequence may refer to a sequence for configuring each of a plurality of symbols constituting SYNC and SFD. The designated sequence may refer to a sequence for configuring an arrangement of a plurality of symbols constituting the SFD.

The processor120may set the designated sequence to [0, 1, 0, −1, 1, 0, 0, −1]. The processor120may receive the first reflected signal and the second reflected signal in a state where interference from an external signal transmitted from another electronic device exists. The external signal may include a third signal for the third field and a fourth signal for the fourth field. The third field and the fourth field may be configured based on the same code sequence as a designated code sequence for configuring the first field (e.g., SYNC) and the second field (e.g., SFD).

The processor120may receive the first reflected signal in the time interval821. The processor120may receive the second reflected signal in the time interval822. The processor120may identify a sequence based on the second reflected signal. For example, the processor120may identify the sequence based on the magnitude of the second reflected signal received within the time interval822. In a state in which interference of an external signal transmitted from another electronic device exists, the processor120may identify the identified sequence as [1, 1, 1, −1, 1, 1, 1, −1] based on the magnitude of the second reflected signal. The processor120may identify that the designated sequence for configuring the second signal and the identified sequence based on the magnitude of the second reflected signal are different from each other. The processor120may identify that the state of the designated information identified from the second reflected signal is the second state. Based on the state of the designated information identified from the second reflected signal being the second state and the interference of external signals, the processor120may switch the operation mode of the UWB circuit from the first mode to the second mode. The processor120may transmit the second frame through the UWB circuit operating in the second mode.

Referring toFIG.8C, the processor120may set the designated sequence to [0, 1, 0, −1, 1, 0, 0, −1]. The processor120may receive the first reflected signal and the second reflected signal in a state in which interference from an external signal transmitted from another electronic device exists. The external signal may include a third signal for the third field and a fourth signal for the fourth field. The third field and the fourth field may be configured based on a code sequence distinct from a designated code sequence for configuring the first field (e.g., SYNC) and the second field (e.g., SFD).

The processor120may receive the first reflected signal in the time interval831. The processor120may receive the second reflected signal in the time interval832. The processor120may identify a sequence based on the second reflected signal. For example, the processor120may identify the sequence based on the magnitude of the second reflected signal received within the time interval832. In a state in which interference of an external signal transmitted from another electronic device exists, the processor120may identify the identified sequence based on the magnitude of the second reflected signal as [0, 1, 0, −1, 1, 0, 0]. The processor120may identify that the identified sequence is the same as the designated sequence for configuring the second signal and the designated sequence based on the magnitude of the second reflected signal. The processor120may identify that the state of the designated information identified from the second reflected signal is the first state. The processor120may obtain information on the external object based on the first state as the state of the designated information identified from the second reflected signal.

Referring back toFIGS.6A to6C, when the processor120uses a code sequence distinguished from a code sequence used by the external electronic device to configure an external signal (or frame), the processor120may identify the state of the designated information identified from the second reflected signal as the first state, even with the interference of the external signal. Accordingly, the processor120may configure the first frame based on a code sequence distinguished from a code sequence used by the external electronic device to configure an external signal (or frame) in order to avoid interference with the external signal.

FIG.9is another flowchart illustrating an operation of an electronic device according to various embodiments. This method may be executed by the electronic device101illustrated inFIG.2and/or the processor120of the electronic device101.

Referring toFIG.9, operations910to920may be related to operation540ofFIG.5. In operation910, the processor120may identify information on a channel impulse response obtained from the first reflected signal based on the state of the designated information identified from the second reflected signal being the first state. The processor120may identify that the designated information identified from the second reflected signal is the same as the designated information set when the first signal is transmitted. The processor120may identify the state of the designated information identified from the second reflected signal as the first state based on the designated information identified from the second reflected signal being the same as the designated information set at the time of transmitting the first signal. The processor120may identify the state of the designated information identified from the second reflected signal as the first state based on the designated information identified from the second reflected signal corresponding to the designated information set at the time of transmitting the first signal. In the first state, the designated information identified from the second reflected signal may correspond to the designated information included in the second signal.

For example, the designated information may include information on a sequence. The processor120may identify the state of the designated information identified from the second reflected signal as the first state based on the sequence identified from the second reflected signal and the sequence established at the time of transmitting the first signal being the same (and/or corresponding).

According to an embodiment, the processor120may receive one reflected signal for the first frame. One reflected signal may be divided into a first reflected signal and a second reflected signal according to a time interval (or a field in the first frame). The processor120may divide one reflected signal for the first frame into a first reflected signal and a second reflected signal. For example, after receiving the first reflected signal, the processor120may receive the second reflected signal. The processor120may store the first reflected signal (or information on the first reflected signal) in the memory. The processor120may identify a state of the designated information based on the second reflected signal. The processor120may identify the stored first reflected signal based on the state of the information identified from the second reflected signal being the first state. The processor120may identify information on the stored first reflected signal based on the state of the information identified from the second reflected signal being the first state. The information on the first reflected signal may include information on a channel impulse response obtained from the first reflected signal.

In operation920, the processor120may obtain information on an external object. The processor120may obtain information on an external object based on the information on the channel impulse response. For example, the processor120may obtain information on the shape of the external object based on the information on the channel impulse response. For another example, the processor120may obtain information on the location of the external object based on the information on the channel impulse response. As another example, the processor120may obtain information on the movement (or state) of the external object based on the information on the channel impulse response. According to an embodiment, the processor120may obtain biometric information of a user of the electronic device101, which is an external object, based on the information on the channel impulse response.

FIG.10is another flowchart illustrating an operation of an electronic device according to various embodiments. This method may be executed by the electronic device101illustrated inFIG.2and/or the processor120of the electronic device101.

Referring toFIG.10, operations1010to1020may be related to operation920. In operation1010, biometric information of the external object may be obtained as information on the external object. The processor120may obtain biometric information of the user of the electronic device101as external object information on the external object. For example, the processor120may transmit one signal for the first frame. The one signal may be divided into a first signal and a second signal according to time (or field). For example, the processor120may transmit a first signal and a second signal.

The one transmitted signal may be reflected from the user's chest. For example, the first signal and the second signal may be reflected from the user's chest. The processor120may receive one reflected signal for one signal. The one reflected signal may be divided into a first reflected signal and a second reflected signal according to time (or field). The processor120may receive a first reflected signal for the first signal and a second reflected signal for the second signal. The processor120may acquire biometric information of the user through information on the channel impulse response obtained from the first reflected signal based on the second reflected signal. For example, the processor120may obtain information on the movement of the user's chest based on the information on the channel impulse response. The processor120may obtain information on the user's heart rate or breathing cycle based on information on the user's chest movement. As another example, the processor120may obtain information on a user's vital signs based on the information on the channel impulse response.

In operation1020, the processor120may output a notification through the output device220based on whether the biometric information of the external object satisfies a designated condition. The processor120may output a notification through the output device220based on the biometric information of the user of the electronic device101satisfying a designated condition.

For example, the processor120may identify that the breathing cycle of the user of the electronic device101is greater than or equal to a designated cycle. The processor120may output a notification through the output device220based on the user's breathing cycle of the electronic device101being greater than or equal to a designated cycle.

As another example, the processor120may obtain information on the vital signs of the user of the electronic device101. The processor120may identify that the vital signs of the user have rapidly (or suddenly) changed. The processor120may output a notification through the output device220based on identifying that the user's vital signs have changed rapidly.

According to an embodiment, the processor120may store (and/or record) the user's biometric information that is changed over time based on the user's biometric information of the electronic device101satisfying a designated condition.

For example, the processor120may identify that the user's breathing cycle of the electronic device101is maintained at a constant cycle. The processor120may store (and/or record) information on a breathing cycle that changes over time based on the fact that the user's breathing cycle of the electronic device101is maintained at a constant cycle.

FIG.11illustrates an example of an operation of outputting a notification in an electronic device according to various embodiments.

Referring toFIG.11, the output device220of the electronic device101may include a display module (e.g., the display module160ofFIG.1). The processor120may identify that the user's biometric information of the electronic device101satisfies a designated condition. The processor120may output a notification1110based on identifying that the user's biometric information of the electronic device101satisfies a designated condition.

For example, the processor120may identify that the vital signs of the user of the electronic device101have changed rapidly. The processor120may display the screen1100through the display module based on identifying that the user's vital signs have changed rapidly. The processor120may output a screen1100including a notification1110indicating that the vital signs of the user have changed rapidly.

FIG.11illustrates an example of outputting a notification through a display module, but is not limited thereto. The notification may be output in various ways.

For example, the output device220may include a sound output module (e.g., the sound output module155ofFIG.1). The processor120may provide a notification to the user of the electronic device101through sound based on identifying that the biometric information of the user of the electronic device101satisfies a designated condition.

According to an embodiment, the processor120may transmit the user's biometric information to an external electronic device or server based on identifying that the user's biometric information satisfies a designated condition. For example, the processor120may transmit a request signal for providing a notification through the external electronic device to the external electronic device based on identifying that the user's biometric information satisfies a designated condition.

FIG.12is another flowchart illustrating an operation of an electronic device according to various embodiments. This method may be executed by the electronic device101and the processor120of the electronic device101illustrated inFIG.2.

Referring toFIG.12, operations1210to1230may be related to operation540ofFIG.5. In operation1210, the processor120may identify whether the first reflected signal is received less than a designated intensity.

The processor120may transmit the first frame through one signal. The one signal may be divided into a first signal and a second signal according to time (or field). The processor120may receive one reflected signal for one signal for transmitting the first frame. The one reflected signal may be divided into a first reflected signal and a second reflected signal according to time (or field).

For example, the processor120may transmit a first signal for a first field in the first frame and a second signal for a second field in the first frame. The processor120may receive a first reflected signal for the first signal. The processor120may receive a second reflected signal for the second signal.

The processor120may receive a first reflected signal for the first signal and a second reflected signal for the second signal. The processor120may identify that the state of the designated information identified from the second reflected signal is the first state. Based on identifying that the state of the designated information identified from the second reflected signal is the first state, the processor120may identify whether the first reflected signal for the first signal is received less than a designated intensity.

In operation1220, when the first reflected signal is received with less than the designated intensity, the processor120may switch the operation mode of the UWB circuit from the first mode to the second mode. The processor120may switch the operation mode of the UWB circuit from the first mode to the second mode based on the first reflected signal being received with less than a designated intensity. The processor120may transmit the second frame through the UWB circuit operating in the second mode.

In operation1230, when the first reflected signal is not received with less than the designated intensity, the processor120may obtain information on the external object through information on the channel impulse response obtained from the first reflected signal. When the first reflected signal is received at a designated intensity or more, the processor120may obtain information on an external object through information on a channel impulse response obtained from the first reflected signal.

According to operations1210to1230, even when the state of the designated information identified from the second reflected signal is the first state, based on the first reflected signal being received with less than the designated intensity, the processor120may change the operation mode of the UWB circuit from the first mode to the second mode.

According to an embodiment, the processor120may identify whether the first reflected signal is received less than a designated intensity while receiving the first reflected signal. The processor120may not receive the second reflected signal based on the reception of the first reflected signal being less than the designated intensity. The processor120may omit an operation of receiving the second reflected signal based on the reception of the first reflected signal less than a designated intensity. The processor120may switch the operation mode of the UWB circuit from the first mode to the second mode instead of receiving the second reflected signal based on the reception of the first reflected signal less than a designated intensity.

FIG.13is another flowchart illustrating an operation of an electronic device according to various embodiments. This method may be executed by the electronic device101and/or the processor120of the electronic device101illustrated inFIG.2.

Referring toFIG.13, operations1310to1320may be related to operation540ofFIG.5. In operation1310, the processor120may bypass the acquisition of information on an external object based on the state of the designated information identified from the second reflected signal is the second state.

The processor120may identify that the designated information identified from the second reflected signal is different from the designated information set when the second signal is transmitted. The processor120may identify that the state of the designated information identified from the second reflected signal is the second state based on identifying that the designated information identified from the second reflected signal is different from the designated information set when the second signal is transmitted. The processor120may identify the state of the designated information identified from the second reflected signal as the second state, based on distinguishing the designated information identified from the second reflected signal from the designated information set when the first signal is transmitted. In the second state, the designated information identified from the second reflected signal may be distinguished from the designated information included in the second signal.

For example, the designated information may include information on a sequence. The processor120may identify the state of the designated information identified from the second reflected signal as the second state based on the distinction between the sequence identified from the second reflected signal and the sequence set at the time of transmission of the first reflected signal.

The processor120may bypass the acquisition of information on an external object based on the state of the designated information identified from the second reflected signal being the second state. The processor120may omit the acquisition of information on an external object based on the state of the designated information identified from the second reflected signal being the second state. The processor120may switch the operation mode of the UWB circuit from the first mode to the second mode instead of obtaining information on the external object based on the state of the designated information identified from the second reflected signal is the second state.

In operation1320, the processor120may transmit the second frame through the UWB circuit operating in the second mode switched from the first mode.

InFIGS.14and15below, an example of an operation of the processor120for transmitting the second frame through the UWB circuit operating in the second mode switched from the first mode may be described.

FIG.14illustrates another example of an operation of an electronic device according to various embodiments.

Referring toFIG.14, the processor120may transmit a frame1401and a frame1402based on a period1411. The processor120may transmit the frame1401and transmit the frame1402after a time period corresponding to the period1411has elapsed. The processor120may transmit the frame1401and the frame1402based on a first offset (not shown). For example, the first offset may be set to a first value (e.g., 0).

The processor120may transmit a first signal for the first field of the frame1402and a second signal for the second field of the frame1402. The processor120may receive a first reflected signal for the first signal and a second reflected signal for the second signal. The processor120may identify a state of designated information identified from the second reflected signal. The processor120may identify that the state of the designated information identified from the second reflected signal is the second state. The processor120may switch the operation mode of the UWB circuit from the first mode to the second mode based on identifying that the state of the designated information identified from the second reflected signal is the second state. The processor120may transmit the frame1403through the UWB circuit operating in the second mode. The processor120may transmit the frame1403based on the second offset1412. The processor120may transmit the frame1403and at least one frame transmitted after the frame1403based on the period1411.

For example, the processor120may perform a random back-off based on identifying that the state of the designated information identified from the second reflected signal is the second state. For example, the processor120may switch a transmission timing of a frame (e.g., frame1403) transmitted at a designated period. The processor120may set a back-off counter as a random value. The processor120may reduce the set back-off counter value based on a designated time. The processor120may identify that the set back-off counter value is 0. The processor120may transmit the frame1403in response to the set back-off counter value being 0. A time interval until the back-off counter value is reduced to 0 may be referred to as a second offset1412.

According to an embodiment, the processor120may set the first offset (not shown) and the second offset1412to be the same. For example, the first offset (not shown) and the second offset1412may be set to a first value (e.g., 0). The processor120may transmit the frame1403and at least one frame transmitted after the frame1403through a period distinguished from the period1411through the UWB circuit operating in the second mode.

FIG.15illustrates another example of an operation of an electronic device according to various embodiments.

Referring toFIG.15, the processor120may transmit a frame1501and a frame1502through a first channel1510based on a period1511. The processor120may transmit the frame1501within the first channel1510, and transmit the frame1502after a time period corresponding to the period1511has elapsed.

The processor120may transmit a first signal for the first field of the frame1502and a second signal for the second field of the frame1502. The processor120may receive a first reflected signal for the first signal and a second reflected signal for the second signal. The processor120may identify a state of designated information identified from the second reflected signal. The processor120may identify that the state of the designated information identified from the second reflected signal is the second state. The processor120may change the operation mode of the UWB circuit from the first mode to the second mode based on identifying that the state of the designated information identified from the second reflected signal is the second state.

According to an embodiment, the processor120may transmit a signal (or frame) through the first channel1510through the UWB circuit operating in the first mode. The processor120may transmit a signal (or frame) through the second channel1520through the UWB circuit operating in the second mode.

For example, the processor120may transmit the frame1503through a UWB circuit operating in the second mode. The processor120may change the channel through which the frame (e.g., the frame1503) is transmitted from the first channel1510to the second channel1520. The processor120may transmit the frame1503within the second channel1520. The processor120may transmit the frame1503based on the period1511.

FIG.16is another flowchart illustrating an operation of an electronic device according to various embodiments. This method may be executed by the electronic device101and the processor120of the electronic device101illustrated inFIG.2.

Referring toFIG.16, the processor120may receive a first external signal for a first external field in an external frame and a second external signal for a second external field in the external frame from an external electronic device. The first external signal transmitted from the external electronic device may be related to the first signal. The second external signal transmitted from the external electronic device may be related to the second signal.

For example, in order to obtain information on the first external object, the processor120may transmit a first signal for the first field in the first frame and a second signal for the second field in the first frame. Similarly, an external electronic device (e.g., a processor of an external device) may transmit a first external signal to a first external field in an external frame and a second external signal to a second external field in the external frame in order to obtain information on the second external object. According to an embodiment, the first external object and the second external object may refer to the same external object.

The processor120may receive the first external signal. The processor120may not distinguish the first external signal from the first signal transmitted from the processor120. After receiving the first external signal, the processor120may receive the second external signal. The processor120may identify information on the first external signal.

In operation1620, the processor120may discard information on the first external signal based on the second external signal of the first external signal and the second external signal.

For example, the processor120may identify designated information from the second external signal. The processor120may identify that the designated information identified from the second external signal is different from the set designated information when the second signal is transmitted. The processor120may identify that the first external signal and the second external signal are distinguished from the first signal and the second signal transmitted from the processor120based on identifying that the designated information identified from the second external signal is different from the set designated information when the second signal is transmitted. The processor120may discard information on the first external signal.

According to an embodiment, instead of obtaining information on the first external object based on the first external signal, the processor120may wait to receive the first reflected signal for the first signal and the second reflected signal for the second signal. According to an embodiment, the processor120may transmit a second frame instead of obtaining information on the first external object based on the first external signal.

According to various embodiments, an electronic device (for example, the electronic device101ofFIG.2) may comprise an ultra-wide band (UWB) circuit (for example, the UWB circuit210ofFIG.2), at least one processor comprising a controller of UWB circuit, the at least one processor may be configured to: transmit, through the UWB circuit operating in a first mode, a first signal for a first field in a first frame; transmit, through the UWB circuit operating in the first mode, a second signal including designated information for a second field in the first frame, that is distinct from the first signal; receive, through the UWB circuit operating in the first mode, a first reflected signal related to the first signal and a second reflected signal related to the second signal, respectively, caused by an external object; according to a state of the designated information identified from the second reflected signal, obtain information on the external object based on the first reflected signal or transmit a second frame through the UWB circuit operating in a second mode switched from the first mode.

According to an embodiment, the at least one processor may be configured to transmit the second signal, through the UWB circuit operating in the first mode after a designated time interval has elapsed from the timing at which the first signal was transmitted.

According to an embodiment, the at least one processor may be configured to obtain the information on the external object through information on channel impulse response obtained from the first reflected signal based on the state of the designated information identified from the second reflected signal being a first state and the designated information identified from the second reflected signal may correspond to the designated information included in the second signal in the first state.

According to an embodiment, the electronic device (for example, the output device220ofFIG.2) may further comprise an output device, and the at least one processor may be configured to: obtain biometric information of the external object as the information on the external object, and output, through output device, a notification based on the biometric information that satisfies a designated condition.

According to an embodiment, the information on the external object may comprise at least one of information on shape of the external object, information on location of the external object, and information on movement of the external object.

According to an embodiment, the at least one processor may be configured to: bypass obtaining the information on the external object based on the state of the designated information identified from the second reflected signal being a second state, and transmit, through the UWB circuit operating in the second mode switched from the first mode, the second frame, and; the designated information identified from the second reflected signal may be distinct from the designated information included in the second signal in the second state.

According to an embodiment, at least part of the first field may be configured based on a first sequence, and the designated information may comprise information on a second sequence for configuring the second field, and the second sequence for configuring the second field may be distinct from the first sequence configuring at least part of the first field.

According to an embodiment, the at least one processor may be configured to: identify third sequence based on the second reflected signal, and identify the state of the designated information identified from the second reflected signal based on the second sequence and the third sequence identified.

According to an embodiment, the second frame may comprise the first field and third field, and the third filed may be configured based on fourth sequence distinct from second sequence configuring the second field.

According to an embodiment, the at least one processor may be configured to: identify that the third sequence identified based on the second reflected signal corresponds to the second sequence, and based on identifying that the third sequence corresponds to the second sequence, identify the state of the designated information as the first state.

According to an embodiment, the at least one processor may be configured to: identify whether the first reflected signal has been received with less than a designated intensity, and switch an operation mode of the UWB circuit from the first mode to the second mode based on the first reflected signal being received with less than a designated intensity.

According to an embodiment, the at least one processor may be configured to: bypass an operation for measuring a channel condition for transmitting the first signal and the second signal, and transmit, through the UWB circuit operating in the first mode, the first signal.

According to an embodiment, the designated information may comprise unique identification information for the electronic device.

According to an embodiment, the at least one processor may be configured to transmit, through the UWB circuit operating in the first mode, the first frame based on first period.

According to an embodiment, the first frame may be transmitted according to the first period based on first offset, and the second frame may be transmitted according to the second period based on second offset distinct from the first offset.

According to an embodiment, the at least one processor may be set to transmit the second frame based on a second period distinguished from the first period through the UWB circuit operating in the second mode switched from the first mode.

According to an embodiment, the first frame may be transmitted in first channel through the UWB circuit (for example, the UWB circuit210ofFIG.2) operating in the first mode, and the second frame may be transmitted in second channel distinct from the first channel through the UWB circuit operating in the second mode.

According to an embodiment, a method of an electronic device (for example, the electronic device101ofFIG.2) may comprise transmitting, through an UWB circuit operating in a first mode, a first signal for a first field in a first frame; transmitting, through the UWB circuit operating in the first mode, a second signal including designated information for a second field in the first frame, that is distinct from the first signal; receiving, through the UWB circuit operating in the first mode, a first reflected signal related to the first signal and a second reflected signal related to the second signal, respectively, caused by an external object; according to a state of the designated information identified from the second reflected signal, obtaining information on the external object based on the first reflected signal or transmit a second frame through the UWB circuit operating in a second mode switched from the first mode.

According to an embodiment, the method may further comprise obtaining the information on the external object through information on channel impulse response obtained from the first reflected signal based on the state of the designated information identified from the second reflected signal being a first state, and the designated information identified from the second reflected signal may correspond to the designated information included in the second signal in the first state.

According to an embodiment, the method may further comprise bypassing obtaining the information on the external object based on the state of the designated information identified from the second reflected signal being a second state, and transmitting, through the UWB circuit operating in the second mode switched from the first mode, the second frame, and; the designated information identified from the second reflected signal may be distinct from the designated information included in the second signal in the second state.

According to an embodiment, computer readable storage medium may store one or more programs, the one or more programs including one or more instructions causing, when the electronic device to transmit, through an UWB circuit (for example, the UWB circuit210ofFIG.2) operating in a first mode, a first signal for a first field in a first frame; transmit, through the UWB circuit operating in the first mode, a second signal including designated information for a second field in the first frame, that is distinct from the first signal; receive, through the UWB circuit operating in the first mode, a first reflected signal related to the first signal and a second reflected signal related to the second signal, respectively, caused by an external object; according to a state of the designated information identified from the second reflected signal, obtain information on the external object based on the first reflected signal or transmit a second frame through the UWB circuit operating in a second mode switched from the first mode.