KR20200102896A - An wireless communication apparatus capable of fast beam selection and a method of operation thereof - Google Patents

Abstract

The present disclosure relates to an operating method of a wireless communication device including a phased array having first and second antenna groups to form a beam for transceiving signals polarized in different directions. The operating method of the present invention comprises the steps of: sweeping a first reception beam formed in a first antenna group to have first patterns among a plurality of patterns to receive first signals polarized in a first direction; sweeping a second reception beam formed in a second antenna group to have second patterns among the patterns to receive second signals polarized in a second direction; measuring powers of the first and second signals; analyzing a relationship between a channel corresponding to the first reception beam and a channel corresponding to the second reception beam; predicting, on the basis of a result of the analysis, powers of third signals predicted to be received through the first antenna group when the first reception beam is swept to have patterns other than the first patterns among the patterns, and powers of fourth signals predicted to be received through the second group when the second reception beam is swept to have patterns other than the second patterns among the patterns; and selecting a reception beam pattern for wireless communication by using powers of the first to fourth signals.

Description

TECHNICAL FIELD An wireless communication apparatus capable of fast beam selection and a method of operation thereof

The technical idea of the present disclosure relates to a wireless communication device capable of fast beam selection.

The recent 5G communication system is a new radio access technology, and aims to provide ultra-high-speed data services of several Gbps using an ultra-wide band with a bandwidth of 100 MHz or more compared to existing LTE and LTE-A. However, since it is difficult to secure an ultra-wide band frequency of 100 MHz or higher in the frequency band of several hundred MHz or several GHz used in LTE and LTE-A, the 5G communication system uses a wide frequency band existing in the frequency band of 6 GHz or higher. A method of transmitting the is being considered. Specifically, in the 5G communication system, it is considered to increase the transmission rate by using a millimeter wave band such as a 28 GHz band or a 60 GHz band. However, since the path loss of the frequency band and the radio wave are proportional, the path loss of the radio wave has a large characteristic in such an ultra-high frequency, so that the service area is reduced.

In 5G communication systems, in order to overcome the shortcomings of such a reduction in service area, a beamforming technology that increases the reach of radio waves by generating a directional beam using a plurality of antennas is becoming important. Beamforming technology can be applied to a transmitting device (e.g., cell) and a receiving device (e.g., terminal), respectively, and in addition to expanding the service area, it reduces interference due to physical beam concentration in the target direction. It works.

In a 5G communication system, since the beamforming technology is effective only when the direction directions of the transmission beam of the transmission device and the reception beam of the reception device are synchronized with each other, a technology for selecting the optimal transmission beam and reception beam is important. In addition, a technology for quickly selecting an optimal transmission beam and a reception beam to meet the low latency scheme of 5G communication systems is also becoming important.

A problem to be solved by the technical idea of the present disclosure is to provide a wireless communication device capable of quickly selecting a pattern of a reception beam that is optimally tuned to a predetermined cell in a wireless communication system, and an operating method thereof.

In order to achieve the above object, a phased array including a first antenna group and a second antenna group to form a beam for transmitting and receiving polarized signals in different directions according to the technical idea of the present disclosure. In the operating method of a wireless communication device comprising ), a first signal polarized in a first direction by sweeping a first reception beam formed in the first antenna group to have first patterns among a plurality of patterns. Receiving second signals polarized in a second direction by sweeping a second receiving beam formed in the second antenna group to have second patterns among the plurality of patterns, and receiving second signals polarized in a second direction. Measuring powers and powers of the second signals, analyzing a relationship between a channel corresponding to the first reception beam and a channel corresponding to the second reception beam, the first reception beam When sweeping to have patterns other than the first patterns among a plurality of patterns, the powers of the third signals expected to be received through the first antenna group and the second reception beam are the ones among the plurality of patterns. Predicting powers of fourth signals expected to be received through the second antenna group when being swept to have patterns other than the second patterns based on the analysis result, and powers of the first signals, the first And selecting a reception beam pattern for wireless communication using powers of two signals, powers of the third signals, and powers of the fourth signals.

The wireless communication device according to exemplary embodiments of the present disclosure can effectively reduce the time required for beam sweeping by performing a beam sweeping operation so that reception beams having different polarization directions have different patterns according to each polarization direction. It is possible to efficiently and quickly determine an optimal reception beam pattern by compensating for a performance loss that may occur due to some patterns skipped in the sweeping operation.

The effects obtainable in the exemplary embodiments of the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned are common knowledge in the technical field to which the exemplary embodiments of the present disclosure pertain from the following description. It can be clearly derived and understood by those who have. That is, unintended effects of implementing the exemplary embodiments of the present disclosure may also be derived from the exemplary embodiments of the present disclosure by a person having ordinary skill in the art.

1 is a block diagram illustrating a wireless communication system according to an exemplary embodiment of the present disclosure.
Fig. 2 is a block diagram showing a wireless communication device according to an exemplary embodiment of the present disclosure.
3 is a block diagram illustrating a fast beam selection module according to an exemplary embodiment of the present disclosure.
FIG. 4 is a diagram illustrating a method of determining a reception beam pattern by the processor of FIG. 2 according to an exemplary embodiment of the present disclosure.
5 is a diagram illustrating a method of setting a reference pattern of the processor of FIG. 2 according to an exemplary embodiment of the present disclosure.
6 is a diagram for describing a method of resetting a reference pattern of the processor of FIG. 2 according to an exemplary embodiment of the present disclosure.
7A and 7B are diagrams for explaining a method of forming a reception beam having a reference pattern according to exemplary embodiments of the present disclosure.
8 is a diagram illustrating a method of calculating a reference ratio of the processor of FIG. 2 according to an exemplary embodiment of the present disclosure.
9 and 10 are diagrams for explaining a beam sweeping operation of the processor of FIG. 2 according to an exemplary embodiment of the present disclosure.
11 is a flowchart illustrating a cell search method of a wireless communication device according to an exemplary embodiment of the present disclosure.
12A and 12B are diagrams illustrating a method of selecting a reception beam pattern of the processor of FIG. 2 according to exemplary embodiments of the present disclosure.
FIG. 13 is a flowchart illustrating a method of selecting a reception beam pattern by the processor of FIG. 2 according to an exemplary embodiment of the present disclosure.
14 is a block diagram illustrating an electronic device according to an exemplary embodiment of the present disclosure.

A base station communicates with a wireless communication device and is an entity that allocates communication network resources to the wireless communication device, and includes a cell, a base station (BS), a NodeB (NB), eNodB (eNB), and a NG next generation radio (RAN). access network), a radio access unit, a base station controller, or a node on a network. In the following, the base station is referred to as a cell and described.

A wireless communication device is a subject that communicates with a base station or other wireless communication device, and includes a node, a user equipment (UE), a next generation UE (NG UE), a mobile station (MS), a mobile equipment (ME), It may be referred to as a device or a terminal.

In addition, wireless communication devices include smartphones, tablet PCs, mobile phones, video phones, e-book readers, desktop PCs, laptop PCs, netbook computers, PDAs, portable multimedia players (PMPs), MP3 players, medical devices, cameras, or wearables. It may include at least one of the devices. In addition, wireless communication devices include televisions, digital video disk (DVD) players, audio, refrigerators, air conditioners, vacuum cleaners, ovens, microwave ovens, washing machines, air purifiers, set-top boxes, home automation control panels, security control panels, and media boxes. (Eg, Samsung HomeSyncTM, Apple TVTM, or Google TVTM), a game console (eg, XboxTM, PlayStationTM), an electronic dictionary, an electronic key, a camcorder, or an electronic frame. In addition, wireless communication devices include various medical devices (e.g., various portable medical measuring devices (blood glucose meter, heart rate meter, blood pressure meter, or body temperature meter), magnetic resonance angiography (MRA), magnetic resonance imaging (MRI), and computed CT (CT). tomography), cameras, or ultrasound), navigation devices, global navigation satellite system (GNSS), event data recorder (EDR), flight data recorder (FDR), automobile infotainment devices, electronic equipment for ships (e.g.: Marine navigation devices, gyro compasses, etc.), avionics, security devices, vehicle head units, industrial or home robots, drones, ATMs in financial institutions, point of sales (POS) in stores , Or IoT devices (eg, light bulbs, various sensors, sprinkler devices, fire alarms, temperature controllers, street lights, toasters, exercise equipment, hot water tanks, heaters, boilers, etc.). In addition, the wireless communication device may include various types of multimedia systems capable of performing communication functions.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a wireless communication system 1 according to an exemplary embodiment of the present disclosure.

Referring to FIG. 1, a wireless communication system 1 may include a cell 10 and a wireless communication device 20. The wireless communication system 1 is illustrated as including only one cell 10 for convenience of description, but this is only an exemplary embodiment, and is not limited thereto, and includes a variety of cells. The wireless communication system 1 can be implemented so as to be. In addition, the wireless communication system 1 is described on the premise that it is a 5G communication system to which the beamforming technology is applied, but this is only an exemplary embodiment, and it is clear that the spirit of the present disclosure can be applied to various communication systems. The cell 10 may be connected to the wireless communication device 20 through a wireless channel to provide various communication services. The cell 10 may service all user traffic through a shared channel, and may collect and schedule state information such as a buffer state, an available transmit power state, and a channel state of the wireless communication device 20. . The wireless communication system 1 may support beamforming technology by using Orthogonal Frequency Division Multiplexing (OFDM) as a radio access technology. In addition, the wireless communication system 1 is an adaptive modulation & coding (AMC) method that determines a modulation scheme and a channel coding rate according to a channel state of the wireless communication device 20. Can support. The wireless communication device 20 according to an exemplary embodiment of the present disclosure may include a phased array configured to simultaneously transmit or receive signals polarized in two or more different directions.

In addition, the wireless communication system 1 can transmit and receive signals using a wide frequency band existing in a frequency band of 6 GHz or higher. For example, in the wireless communication system 1, a data transmission rate may be increased by using a millimeter wave band such as a 28 GHz band or a 60 GHz band. In this case, since the millimeter wave band has a relatively large signal attenuation per distance, the wireless communication system 1 can support transmission and reception based on a directional beam generated using multiple antennas to secure coverage. The wireless communication system 1 may be a system supporting multiple input, multiple output (MIMO), and accordingly, the cell 10 and the wireless communication device 20 may support a beamforming technology. The beam forming technology can be divided into digital beam forming, analog beam forming, hybrid beam forming, and the like, and the technical idea of the present disclosure is applicable to all beam forming technologies.

The wireless communication device 20 according to an exemplary embodiment of the present disclosure may perform a beam sweeping operation on a reception beam for directional beam-based transmission and reception. With beam sweeping, the cell 10 and the wireless communication device 20 sequentially or randomly sweep a directional beam having a predetermined pattern, respectively, to select a pattern of a transmission beam and a reception beam whose directing directions are synchronized with each other. It is a process. The pattern (or beam pattern) may be a shape of a beam determined by the width of the beam and the direction of the beam. The pattern of the transmission beam and the pattern of the reception beam whose directing directions are tuned to each other may be selected as a transmission/reception beam pattern pair. That is, when the cell 10 transmits data through a transmission beam having a selected pattern, the wireless communication device 20 may receive the data through a reception beam having the selected pattern. In addition, the wireless communication device 20 may transmit predetermined data to the cell 10 by forming a transmission beam having the same pattern as that of the selected reception beam. In FIG. 1, the wireless communication device 20 is shown to receive signals from one cell 10, but this is not limited to this as an exemplary embodiment, and the wireless communication device 20 receives signals from a plurality of cells. Can receive at the same time. Hereinafter, an operation for selecting a reception beam pattern of the wireless communication device 20 according to an embodiment of the present disclosure will be described.

The wireless communication device 20 may include a phased array including a first antenna group and a second antenna group to form a beam for transmitting and receiving signals polarized in different directions. The first antenna group includes antennas (or element antennas) for receiving first signals polarized in a first direction, and the second antenna group is an antenna for receiving second signals polarized in a second direction May include (or element antennas).

The wireless communication device 20 may receive first signals polarized in a first direction by sweeping a first reception beam formed in the first antenna group to have first patterns among a plurality of patterns. The wireless communication device 20 may receive second signals polarized in a second direction by sweeping a second reception beam formed in the second antenna group to have second patterns among a plurality of patterns. Specifically, the wireless communication device 20 may provide phase/gain control signals to the first antenna group and the second antenna group, respectively, to form a reception beam or a transmission beam each having a plurality of patterns. The plurality of patterns may be commonly formed in the first antenna group and the second antenna group. The wireless communication device 20 may select some patterns of the plurality of patterns as first patterns, and select some of the plurality of patterns as second patterns. The first patterns may include different patterns compared to the patterns included in the second patterns.

The wireless communication device 20 may measure powers of first signals received through the first antenna group and powers of second signals received through the second antenna group. The power of the signals may be referred to as the strength of the signals. In some embodiments, the wireless communication device 20 signals any one of a received signal strength indication (RSSI), a carrier to interference and noise ratio (CINR), a signal to interference ratio (SIR), and a reference signal received power (RSRP) value. It can be measured as the power of.

The wireless communication device 20 may analyze a relationship between a channel corresponding to the first reception beam and a channel corresponding to the second reception beam. Specifically, a channel corresponding to the first reception beam refers to a channel through which a first signal is polarized in a first direction and received, and a channel corresponding to the second reception beam is a second signal polarized in a second direction and received. It can mean the channel that the person experiences. A channel experienced by the first signal or the second signal may vary according to the pattern of the first reception beam or the second reception beam. However, when the patterns of the first and second reception beams are the same, there is a certain relationship between the channel experienced by the first signal received through the first reception beam and the channel experienced by the second signal received through the second reception beam. Can be established. Specifically, the relationship is due to the polarization characteristic of the first signal in the first direction and the polarization characteristic of the second signal in the second direction, and this relationship can be applied to other channels as well. For example, the relationship between the channel of the first signal and the channel of the second signal respectively received through the first and second receiving beams having the same pattern x (wherein x is an arbitrary integer) is the same pattern y ( However, y may be the same as the relationship between the channel of the first signal and the channel of the second signal respectively received through the first receiving beam and the second receiving beam having an arbitrary integer).

Based on the analysis result, the wireless communication device 20 includes the third signals expected to be received through the first antenna group when the first reception beam is swept to have patterns other than the first patterns among a plurality of patterns. Powers can be predicted. In addition, the wireless communication device 20 is expected to be received through the second antenna group when the second reception beam is swept so as to have patterns other than the second patterns among the plurality of patterns based on the analysis result. The powers of the signals can be predicted. That is, the wireless communication device 20 does not sweep the beam so that the first and second reception beams each formed in the first and second antenna groups have all possible patterns in sequence, and the first reception beam is all possible patterns. It is possible to reduce the time required for the beam sweeping operation by beam sweeping the second reception beam to have the remaining patterns among all possible patterns. In addition, the wireless communication device 20 quickly predicts the powers of signals expected to be received through patterns each of the first and second reception beams do not have, and thus received through some patterns skipped in the beam sweeping operation. Loss in which the powers of signals cannot be measured can be minimized.

The wireless communication device 20 may select a reception beam pattern for wireless communication using the measured powers of the first signals and the powers of the second signals, the predicted powers of the third signals, and the powers of the fourth signals. have. As described above, the reception beam pattern selected according to exemplary embodiments of the present disclosure may be selected as the transmission beam pattern.

The wireless communication device 20 includes a beam sweeping operation according to exemplary embodiments of the present disclosure, power measurement of received signals, analysis of channel relationships between signals having different polarization directions, and power prediction of signals expected to be received in a frequency band. It may be performed to search for a frequency of an operating carrier and search for a cell in an environment to which reception beamforming is applied in a specific frequency band.

The wireless communication device 20 according to exemplary embodiments of the present disclosure can effectively reduce the time required for beam sweeping by performing a beam sweeping operation so that reception beams having different polarization directions have different patterns according to each polarization direction. In addition, there is an effect of efficiently and quickly determining an optimal reception beam pattern by compensating for performance loss that may occur due to some patterns skipped in the beam sweeping operation.

Fig. 2 is a block diagram of a wireless communication device 100 according to an exemplary embodiment of the present disclosure.

Referring to FIG. 2, the wireless communication device 100 may include a phase array 110, a radio frequency integrated circuit (RFIC) 120, and a processor 130. In some embodiments, the processor 130 may be referred to as a cell searcher. The phased array 110 can communicate with the RFIC 120 and the RFIC 120 can communicate with the processor 130. Although the wireless communication device 100 including one phased array 110 is illustrated in the example of FIG. 2, in some embodiments, the wireless communication device 100 may include more phase arrays, and each phased array May contain more antenna groups. The phased array 110 may include a plurality of antennas. The plurality of antennas of the phased array 110 may be used to form a transmit/receive beam in some embodiments, and in some embodiments, the phased array 110 transmits a signal polarized in a predetermined direction or It may include an antenna configured to receive, or may include an antenna configured to simultaneously transmit or receive signals polarized in two or more different directions.

The RFIC 120 may be connected to a plurality of antennas of the phased array 110 and a plurality of ports. For example, the RFIC 120 may be connected to the first antenna group 112 through a first port, and may be connected to the second antenna group 114 through a second port. The RFIC 120 may generate a baseband signal by processing signals received from the phased array 110 in a reception mode. The RFIC 120 may provide the generated baseband signal to the processor 130. The RFIC 120 may provide a signal generated by processing a signal received from the processor 100 in a transmission mode to the phase array 110.

The processor 130 may generate data to be transmitted to the cell as a baseband signal and provide it to the RFIC 120, and may extract data transmitted from the cell from the baseband signal received from the RFIC 120. For example, the processor 130 may include at least one digital-to-analog converter (DAC), and at least one digital-to-analog converter (DAC) modulates data to be transmitted to the cell. The baseband signal can be output by converting the generated digital data. In addition, the processor 130 may include at least one analog-to-digital converter (ADC), and at least one analog-to-digital converter (ADC) outputs digital data by converting a baseband signal. can do. In some embodiments, processor 130 may include at least one core that executes a series of instructions, and may be referred to as a modem or baseband processor.

As described above in FIG. 1, the phased array 110 according to exemplary embodiments of the present disclosure includes a first antenna group 112 including antennas for receiving signals polarized in a first direction and a second direction. It may include a second antenna group 114 including antennas for receiving polarized signals.

The processor 130 according to example embodiments of the present disclosure may include a fast beam selection module 132. The fast beam selection module 132 provides a beam control signal B_CS to the first antenna group 112 and the second antenna group 114 so that a plurality of first reception beams formed in the first antenna group 112 The beam sweep may be performed to have first patterns among the patterns, and the second reception beam formed in the second antenna group 114 may be beam-swept to have second patterns among a plurality of patterns. The beam control signal B_CS may be for controlling a phase or a gain of each of the plurality of antennas of the phase array 110.

The fast beam selection module 132 is received through the first antenna group 112 and received through the powers of the first signals that have passed through the RFIC 120 and the second antenna group 114, and the RFIC 120 Powers of the second signals passing through may be measured. However, since this is only an exemplary embodiment, the powers of the first signals and the powers of the second signals may be measured by the RFIC 120.

The fast beam selection module 132 may analyze a relationship between a channel corresponding to the first reception beam and a channel corresponding to the second reception beam. As an exemplary embodiment, in order to analyze the relationship, the fast beam selection module 132 selects a first reception beam and a second reception beam having the same reference pattern, respectively, to the first antenna group 112 and the second antenna group ( 114), and at this time, a ratio between the power of the received first comparison signal and the power of the second comparison signal may be calculated. That is, the ratio between the power of the first comparison signal and the power of the second comparison signal is an index indicating the relationship, and the fast beam selection module 132 may perform a prediction operation based on this. Hereinafter, a ratio between the power of the first comparison signal and the power of the second comparison signal is defined as a reference ratio. However, this is an exemplary embodiment, and is not limited thereto, and the fast beam selection module 132 beam sweeps a plurality of reference patterns to have the same, so that the first receiving beam and the first receiving beam are received through the second receiving beam. By calculating ratios between the powers of the comparison signals and the powers of the second comparison signals, the reference ratio may be determined based on their average value. However, this is only an exemplary embodiment, and the present invention is not limited thereto, and a relationship between a channel corresponding to the first reception beam and a channel corresponding to the second reception beam may be analyzed in various ways.

In an exemplary embodiment, the reference pattern may be a pattern commonly included in the first patterns and the second patterns swept during the beam sweeping operation. Therefore, the fast beam selection module 132 does not separately form the first reception beam and the second reception beam having a reference pattern in the first antenna group 112 and the second antenna group 114 in order to analyze the relationship. , The power of the first signal received through the first reception beam having the reference pattern among the measured powers of the first signals is obtained as the power of the first comparison signal, and the reference pattern among the powers of the measured second signals is obtained. The relationship may be analyzed by acquiring the power of the second signal received through the second receiving beam having the second signal as the power of the second comparison signal.

In another exemplary embodiment, the first patterns and the second patterns of the beam sweeping operation do not include a common reference pattern, and the reference pattern is based on the powers of signals received through the phase array 110 as a result of the beam sweeping operation. Can be set dynamically. That is, the fast beam selection module 132 may set an optimal reference pattern among the first patterns and the second patterns based on the powers of the received signals. The fast beam selection module 132 separately forms a first reception beam or a second reception beam having a determined reference pattern, and uses the received signal power and power of a pre-measured signal corresponding to the reference pattern to determine the relationship. Can be analyzed.

As another exemplary embodiment, the reference pattern may be formed in a method different from the plurality of patterns in the beam sweeping operation through the phase array 110. For example, a plurality of patterns are formed using all of the antennas included in the first antenna group 112 or the second antenna group 114, whereas the reference pattern is the first antenna group 112 or the second antenna group. It may be formed using only some of the antennas included in (114). Accordingly, the width of the beam of the plurality of patterns and the width of the beam of the reference pattern may be different. At this time, the fast beam selection module 132 separately forms a first reception beam and a second reception beam having a reference pattern in the first antenna group 112 and the second antenna group 114 to analyze the relationship, and , The relationship may be analyzed by measuring power of signals respectively received through the first receiving beam and the second receiving beam.

The fast beam selection module 132 includes powers of third signals expected to be received through the first antenna group 112 when the first reception beam is swept to have patterns other than the first patterns among a plurality of patterns. And powers of the fourth signals expected to be received through the second antenna group 114 when the second reception beam is swept to have patterns other than the second patterns among a plurality of patterns, based on the analysis result. I can. As an example, when it is assumed that the pattern z (where z is an arbitrary integer) is not included in the first patterns in the beam sweeping operation and the pattern z is included in the second patterns, the second pattern having the pattern z By applying the reference ratio to the power of the second signal received through the receive beam, the power of the third signal expected to be received through the first receive beam having the pattern z may be predicted.

The fast beam selection module 132 is an exemplary embodiment of the present disclosure during a predetermined period (for example, a periodic period in which a plurality of cells transmit signals required for an operation carrier frequency search or cell search of the wireless communication device 100). A beam sweeping operation using the phase array 110 according to embodiments, a power measurement and prediction operation of signals may be performed multiple times, and the powers of the first signals and the powers of the second signals generated as a result of the above operation , A cell candidate group composed of cells that are likely to be selected as effective cells among a plurality of cells may be determined using the powers of the third signals and the powers of the fourth signals.

The fast beam selection module 132 may select a cell having the highest reliability among the cell candidate groups as an effective cell. Specifically, the fast beam selection module 132 may determine reliability using synchronization signals each received from the cell candidate group through the first reception beam and the second reception beam each having a pattern corresponding to the cell candidate group. The fast beam selection module 132 may select a pattern corresponding to the effective cell as a reception beam pattern for communication with the effective cell.

The fast beam selection module 132 according to example embodiments of the present disclosure may be implemented as hardware logic in the processor 130. In addition, the fast beam selection module 132 may be implemented as software logic that is stored as a plurality of instruction codes in a memory and executed by the processor 132.

3 is a block diagram illustrating a fast beam selection module 132 according to an exemplary embodiment of the present disclosure. Hereinafter, FIG. 3 is described with reference to the configuration of FIG. 2, and contents overlapping with those described in FIG. 2 are omitted.

2 and 3, the fast beam selection module 132 includes a reference beam pattern setter 132a, a beam sweeping controller 132b, a power ratio calculator 132c, a power predictor 132d, and a beam pattern selector ( 132e).

The reference beam pattern setter 132a is used to analyze a relationship between a channel corresponding to a first reception beam formed in the first antenna group 112 and a channel corresponding to a second reception beam formed in the second antenna group 114. At least one necessary reference pattern can be set. The reference beam pattern setter 132a according to an exemplary embodiment may set a reference pattern formed in the same manner as a plurality of patterns in a beam sweeping operation through the phase array 110. For example, the reference beam pattern setter 132a sets at least one of the first patterns of the first reception beam as the reference pattern during the beam sweeping operation, and the second reception beam has the second reception beam during the beam sweeping operation. 2 patterns may be set to include at least one of the reference patterns. Accordingly, the reference pattern may be formed using all of the antennas included in the first antenna group 112 or the second antenna group 114. Details of this will be described in FIG. 4.

The reference beam pattern setter 132a according to an exemplary embodiment may set a reference pattern formed in a method different from that of a plurality of patterns in a beam sweeping operation through the phase array 110. For example, the reference beam pattern setter 132a selectively uses antennas included in the first antenna group 112 or the second antenna group 114 to provide a first reception beam or a second reception beam having a reference pattern. It is possible to set a reference pattern so that this can be formed. Details about this will be described in FIGS. 7A and 7B.

The reference beam pattern setter 132a according to an exemplary embodiment may dynamically set the reference pattern based on the powers of signals received through the phase array 110 as a result of the beam sweeping operation. For example, the reference beam pattern setter 132a may select any one of the received signals from signals having a power equal to or greater than a reference value, and set a pattern corresponding to the selected signal as a reference pattern. Details about this will be described in FIG. 5.

The reference beam pattern setter 132a according to an exemplary embodiment may reset the reference pattern when the reference ratio calculated based on the set reference pattern does not satisfy a predetermined condition. Details about this will be described in FIG. 6.

The beam sweeping controller 132b according to an exemplary embodiment controls the first antenna group 112 so that the first reception beam of the first antenna group 112 has first patterns, and controls the second antenna group 114. The second antenna group 114 may be controlled so that the second reception beam has second patterns. The beam sweeping controller 132b may control beam sweeping for the first antenna group 112 and beam sweeping for the second antenna group 114 to be performed in parallel, respectively. According to some embodiments, the first patterns and the second patterns may each include a common pattern (eg, a reference pattern). Also, according to some embodiments, the first patterns and the second patterns may not include a common pattern.

The beam sweeping controller 132b according to an exemplary embodiment may control a beam sweeping operation for the first antenna group 112 and the second antenna group 114 based on a predetermined rule. That is, the beam sweeping controller 132b may control the beam sweeping operation to satisfy a predetermined rule in the process of beam sweeping the first patterns and the second patterns. A specific embodiment of this will be described with reference to FIGS. 9 and 10.

According to some embodiments, the beam sweeping controller 132b may control the phase array 110 separately from the beam sweeping operation so that a first receiving beam or a second receiving beam having a reference pattern is formed in order to calculate a reference ratio. have.

The reference ratio operator 132c according to an exemplary embodiment is configured to perform powers of the first signals received through the first receiving beam of the first antenna group 112 and the second receiving beam of the second antenna group 114. The powers of the received second signals can be measured. In addition, the reference ratio operator 132c measures or acquires the power of the comparison signal received through the first reception beam having the reference pattern and the comparison signal received through the second reception beam having the reference pattern, and uses the power of the comparison signal. Thus, the reference ratio can be calculated.

The power predictor 132d according to an exemplary embodiment is a third expected to be received through the first antenna group 112 when the first reception beam is swept to have patterns other than the first patterns among a plurality of patterns. The powers of the signals may be predicted using the measured powers of the second signals and a reference ratio. In addition, the power predictor 132d scans the second reception beam to have patterns other than the second patterns among the plurality of patterns. In this case, the powers of the fourth signals expected to be received through the second antenna group 114 may be predicted using the measured powers of the first signals and a reference ratio.

The beam pattern selector 132e according to an exemplary embodiment uses the measured powers of the first signals and the powers of the second signals, the predicted powers of the third signals, and the powers of the fourth signals. At least one of the second patterns may be selected as a reception beam pattern. A specific embodiment of selection of a reception beam pattern will be described with reference to FIGS. 12A and 12B.

FIG. 4 is a diagram illustrating a method of determining a reception beam pattern by the processor 130 of FIG. 2 according to an exemplary embodiment of the present disclosure. Hereinafter, for convenience of description, a plurality of patterns are described on the premise that they include a'P1' pattern to a'P7' pattern, but this is only an exemplary embodiment, and it is understood that the embodiments of the present disclosure are not limited thereto. Will be

2 and 4, the processor 130 may perform beam sweeping according to reception beam patterns by providing a beam control signal B_CS to the phase array 110 (S100 ). For example, the processor 130 may form a first reception beam polarized in a horizontal direction (H-pol) with first patterns using the first antenna group 112, and the second antenna group 114 ) Can be used to form a second reception beam having second patterns and polarized in a vertical direction (V-pol). Hereinafter, the first patterns include a'P1' pattern, a'P3' pattern, a'P4' pattern and a'P6' pattern, and the second patterns are a'P2' pattern, a'P4' pattern, a'P5' pattern, and P7' pattern may be included, and the'P4' pattern, which is a common pattern of the first patterns P1, P3, P4, and P6, and the second patterns P2, P4, P5, P7, is a reference pattern RX_P _REF ) May be preset.

The processor 130 measures the powers of the first signals RX_S1 and the second signals RX_S2 received through step S100, and compares the comparison signals received through the reception beams having the reference pattern RX_P _REF . The power ratio can be calculated (S110). Specifically, the processor 130 is the difference between the power of the first comparison signal received through the first reception beam having the'P4' pattern and the power of the second comparison signal received through the second reception beam having the'P4' pattern. The ratio can be calculated as a reference ratio. According to some embodiments, the processor 130 may determine the power of the first comparison signal and the second comparison signal from the powers of the first signals RX_S1 and powers of the second signals RX_S2 measured in step S110. You can get power.

The processor 130 may predict the powers of signals expected to be received through the phase array 110 using the measured powers and the reference ratio of the first signals RX_S1 and the second signals RX_S2. (S120). Specifically, the processor 130 includes the first antenna group 112 when the first reception beam is swept so as to have patterns P2, P5, and P7 other than the first patterns P1, P3, P4, and P6. The second antenna when the second reception beam is swept so as to have powers of third signals expected to be received through and patterns P1, P3, P6 other than the second patterns P2, P3, P5, and P7 Powers of the fourth signals that are expected to be received through the group 114 may be predicted.

The processor 130 may perform steps S100, S120, and S130 a plurality of times during a predetermined period, and the powers of the first signals, powers of the second signals, powers of the third signals, and A reception beam pattern may be determined using the powers of the fourth signals (S130). The processor 130 may determine a cell candidate group from a plurality of cells based on the powers of the above signals, determine an effective cell from the candidate group, and select at least one pattern corresponding to the effective cell as a reception beam pattern.

5 is a diagram for describing a method of setting a reference pattern of the processor 130 of FIG. 2 according to an exemplary embodiment of the present disclosure.

Referring to FIGS. 2 and 5, the processor 130 may perform beam sweeping according to reception beam patterns by providing a beam control signal B_CS' to the phase array 110 (S100'). For example, the processor 130 may form a first reception beam polarized in a horizontal direction (H-pol) with first patterns using the first antenna group 112, and the second antenna group 114 ) Can be used to form a second reception beam having second patterns and polarized in a vertical direction (V-pol). Hereinafter, the first patterns include a'P1' pattern, a'P3' pattern, a'P4' pattern, and a'P6' pattern, and the second patterns include a'P2' pattern, a'P5' pattern, and a'P7' pattern. A common pattern of the first patterns P1, P3, P4, and P6 and the second patterns P2, P5, and P7 may not exist.

The processor 130 may measure powers for the first signals RX_S1 and the second signals RX_S2 received through step S100' (S141).

The processor 130 may dynamically set the reference pattern RX_P _REF based on the power measurement results of the first signals RX_S1 and the second signals RX_S2 (S142 ). As an example, when the power of the first signal having the pattern'P4' satisfies a specific condition, the processor 130 may set the pattern'P4' as the reference pattern RX_P _REF . The specific condition may be variously set such that the power of a predetermined signal is equal to or greater than a reference value or corresponds to a power having the largest value among the powers of the measured signals.

The processor 130 may additionally form a reception beam (hatched area) having the reference pattern RX_P _REF (S143). Specifically, the processor 130 may provide a reference beam control signal RB_CS _dynamic to the second antenna group 114 to form a second reception beam (hatched area) having a'P4' pattern. The processor 130 may additionally receive a second signal through a second reception beam (a shaded area) having a'P4' pattern, and may measure the power of the received second signal. The processor 130 may calculate a power ratio of comparison signals received through reception beams having a reference pattern RX_P _REF (S144). For example, the processor 130 may include power of a first comparison signal received through a first reception beam having a'P4' pattern and a power of a second comparison signal received through a second reception beam having a'P4' pattern. The ratio between can be calculated as a reference ratio. Thereafter, the processor 130 may follow step S120 of FIG. 4.

In this way, the wireless communication device 100 according to an exemplary embodiment of the present disclosure dynamically sets a reference pattern based on the powers of the measured signals, thereby setting an optimal reference pattern corresponding to the channel environment to implement the present disclosure. The effect according to the examples can be further improved.

6 is a diagram for describing a method of resetting a reference pattern of the processor 130 of FIG. 2 according to an exemplary embodiment of the present disclosure.

Referring to FIGS. 2 and 6, the processor 130 may perform beam sweeping according to reception beam patterns by providing the beam control signal B_CS to the phase array 110 (S100 ). For example, the processor 130 may form a first reception beam polarized in a horizontal direction (H-pol) with first patterns using the first antenna group 112, and the second antenna group 114 ) Can be used to form a second reception beam having second patterns and polarized in a vertical direction (V-pol). Hereinafter, the first patterns include a'P1' pattern, a'P3' pattern, a'P4' pattern and a'P6' pattern, and the second patterns are a'P2' pattern, a'P4' pattern, a'P5' pattern, and P7' pattern may be included, and the'P4' pattern, which is a common pattern of the first patterns P1, P3, P4, and P6, and the second patterns P2, P4, P5, P7, is a reference pattern RX_P _REF ) May be preset.

The processor 130 measures the powers of the first signals RX_S1 and the second signals RX_S2 received through step S100, and compares the comparison signals received through the reception beams having the reference pattern RX_P _REF . The power ratio can be calculated (S110).

The processor 130 may determine whether the result of calculating the power ratio of the comparison signals is success (S151). When the calculation result of the power ratio of the comparison signals is determined to be a failure (S151, No), for example, the processor 130 calculates the power of the first comparison signal received through the first reception beam having a'P4' pattern and When the ratio (or reference ratio) between the powers of the second comparison signal received through the second reception beam having the'P4' pattern is out of the reference range, the processor 130 determines step S151 as a failure and the reference pattern ( RX_P _REF ) can be reset (S152). The reference range may be set to determine whether the operation result is reliable, and since an accurate prediction operation cannot be performed using an operation result outside the reference range, the processor 130 uses the reference pattern RX_P _REF . Can be reset. For example, the processor 130 may reset the pattern'P7' to the reference pattern RX_P _REF '.

The processor 130 may additionally form a reception beam (hatched area) having a reference pattern RX_P _REF ′. Specifically, the processor 130 may provide a reset reference beam control signal RB_CS _RESET to the first antenna group 112 in order to form a first reception beam (hatched area) having a'P7' pattern. The processor 130 may additionally receive a second signal through a first reception beam (hatched area) having a'P7' pattern, and measure the power of the received second signal to perform part of step S110 and step S151. You can follow up.

When the calculation result of the power ratio of the comparison signals is determined to be successful (S151, Yes), the processor 130, for example, the power of the first comparison signal received through the first reception beam having a'P4' pattern. When the ratio (or the reference ratio) between the powers of the second comparison signal received through the second reception beam having the pattern'P4' is within the reference range, step S120 (FIG. 4) may be followed.

In this way, the wireless communication device 100 according to the exemplary embodiment of the present disclosure may guarantee communication performance according to the exemplary embodiments of the present disclosure by resetting the reference pattern according to conditions.

7A and 7B are diagrams for explaining a method of forming a reception beam having a reference pattern according to exemplary embodiments of the present disclosure.

Referring to FIG. 7A, the phased array 210 may include a first antenna group AntG1 and a second antenna group AntG2. The first antenna group AntG1 may include a plurality of antennas 211 to 214 for receiving signals polarized in a first direction (eg, a horizontal direction). The second antenna group AntG2 may include a plurality of antennas 215 to 218 for receiving signals polarized in a second direction (eg, a vertical direction).

The first antenna group AntG1 may form a first receiving beam having first patterns using all of the antennas 211 to 214 during a beam sweeping operation, and the second antenna group AntG2 may perform a beam sweeping operation. At the time, all of the antennas 215 to 218 may be used to form a second reception beam having second patterns.

In addition, antennas 211 to 214 and 215 to 218 used to form a first or second receive beam having first patterns or second patterns to form a receive beam having a reference pattern are used. I can. A group of antennas used to form a reception beam having a reference pattern may be referred to as a reference beam antenna group RBGa. The reference beam antenna group RBGa according to an exemplary embodiment may include antennas 211 to 214 of the first antenna group AntG1 and antennas 215 to 218 of the second antenna group AntG2. .

With further reference to FIG. 7B, unlike FIG. 7A, antennas used to form first or second receive beams having first patterns or second patterns to form a receive beam having a reference pattern Only some of (211~214, 215~218) can be used. The reference beam antenna group RBGb according to an exemplary embodiment may include some antennas 211 of the first antenna group AntG1 and some antennas 215 of the second antenna group AntG2. However, this is only an exemplary embodiment, and is not limited thereto, and the reference beam antenna group RBGb includes three or less antennas and a second antenna among the antennas 211 to 214 of the first antenna group AntG1. Three or less of the antennas 215 to 218 of the group AntG2 may be included.

The number of antennas of the first antenna group AntG1 and the number of antennas of the second antenna group AntG2 shown in FIGS. 7A and 7B are only exemplary embodiments, and are not limited thereto, and the first antenna group AntG1 And the second antenna group AntG2 may include more or fewer than four antennas, respectively.

8 is a diagram illustrating a method of calculating a reference ratio of the processor 130 of FIG. 2 according to an exemplary embodiment of the present disclosure.

2 and 8, the processor 130 may form reception beams having a reference pattern (RX_P _REF ) before performing the beam sweeping operation using the phased array 110 and after performing the beam sweeping operation. Yes (S200). That is, step S200 may precede or follow the beam sweeping operation. Specifically, the processor 130 may provide the reference beam control signal RB_CS to the phase array 110 so as to form reception beams having the reference pattern RX_P _REF in the method illustrated in FIG. 7B. For example, the reference pattern RX_P _REF may be set as a'P4' pattern, and the processor 130 uses some of the antennas of the first antenna group 112 to have a'P4' pattern. A second reception beam having a'P4' pattern may be formed by using the first reception beam and some of the antennas of the second antenna group 114.

The processor 130 may receive comparison signals RCX_S1 and RCX_S2 received through reception beams having a reference pattern RX_P _REF and measure the powers of the received comparison signals RCX_S1 and RCX_S2 (S210). ). The processor 130 may calculate a power ratio of the comparison signals RCX_S1 and RCX_S2 as a reference ratio (S220). The processor 130 may perform prediction on powers of receivable signals according to exemplary embodiments of the present disclosure by using the reference ratio.

9 and 10 are diagrams for describing a beam sweeping operation of the processor 130 of FIG. 2 according to an exemplary embodiment of the present disclosure.

2 and 9, the processor 130 may perform beam sweeping using the first antenna group 112 and beam sweeping using the second antenna group 114 in parallel. The processor 130 includes a'P1' pattern, a'P2' pattern, a'P3' pattern, and a'P4' pattern in which the first patterns of the first reception beam formed in the first antenna group 112, and the second antenna The second patterns of the second reception beam formed in the group 114 may be set to include a'P5' pattern, a'P6' pattern, and a'P7' pattern.

The processor 130 according to an exemplary embodiment may control the beam sweeping in a predetermined order so that the angle θ1 between the simultaneously formed first receiving beam and the second receiving beam is equal to or greater than the first reference value. For example, by the processor 130, the phased array 110 may form a first receiving beam having a'P1' pattern, and in this case, a second receiving beam having a'P5' pattern may be formed, followed by Thus, a first receiving beam having a'P2' pattern is formed, and at this time, a second receiving beam having a'P6' pattern may be formed, followed by forming a first receiving beam having a'P3' pattern, In this case, a second reception beam having a'P7' pattern may be formed, and subsequently, a first reception beam having a'P4' pattern may be formed.

That is, the processor 130 sets the first patterns and the second patterns so that the angle θ1 between the simultaneously formed first and second reception beams is equal to or greater than the first reference value, and controls the beam sweeping operation. During the beam sweeping operation, the correlation between the first reception beam and the second reception beam may be less than or equal to a reference value. By lowering the correlation between the first reception beam and the second reception beam, the possibility of an error due to polarization leakage can be reduced, and through this, the effects according to embodiments of the present disclosure can be further improved.

With further reference to FIG. 10, the processor 130 includes a'P1' pattern, a'P3' pattern, a'P5' pattern, and a'P7' pattern of the first patterns of the first reception beam formed in the first antenna group 112. Including and, the second patterns of the second reception beam formed in the second antenna group 114 may be set to include a'P2' pattern, a'P4' pattern, and a'P6' pattern.

The processor 130 according to an exemplary embodiment may control beam sweeping in a predetermined order so that an angle θ2 between the simultaneously formed first and second receive beams is equal to or less than the second reference value. For example, by the processor 130, the phased array 110 may form a first receiving beam having a'P1' pattern, and in this case, a second receiving beam having a'P2' pattern may be formed, and then Thus, a first receiving beam having a'P3' pattern is formed, and at this time, a second receiving beam having a'P4' pattern may be formed, and a first receiving beam having a'P5' pattern is subsequently formed, In this case, a second reception beam having a'P6' pattern may be formed, and subsequently, a first receiving beam having a'P7' pattern may be formed.

That is, the processor 130 sets the first patterns and the second patterns so that the angle θ2 between the simultaneously formed first and second reception beams is less than or equal to the second reference value, and controls the beam sweeping operation. A poor channel environment experienced by a signal in a specific polarization direction may be compensated, and through this, the accuracy of the power prediction operation according to the exemplary embodiments of the present disclosure may be greater than or equal to a reference value.

11 is a flowchart illustrating a cell search method of a wireless communication device according to an exemplary embodiment of the present disclosure.

Referring to FIG. 11, the wireless communication device may select a beam pattern set from among a plurality of patterns (S210 ). The beam pattern set may include a pattern mapped to a first antenna group of a phased array and a pattern mapped to a second antenna group of a phased array among a plurality of patterns that can be formed by the wireless communication device through a phased array. For example, the i-th beam pattern set (where i is an integer greater than or equal to 1) may include the (2i-1)th pattern and the 2ith pattern. Hereinafter, it is assumed that there are N beam pattern sets (wherein N is an integer greater than or equal to 1).

The wireless communication device may map the (2i-1)th pattern to the first antenna group (S211) and the (2i)th pattern to the second antenna group (S212). The wireless communication device may measure power of signals received through reception beams formed in the first antenna group and the second antenna group (S213). The wireless communication device can determine whether'i' is'N' (S214), and when'i' is not'N' (S214, No), counts up'i' (S215), and S210 may be followed. When'i' is'N' (S214, Yes), the wireless communication device may predict power of signals expected to be received through reception beams (S216). That is, the wireless communication device is the power of signals expected to be received when the first reception beam formed in the first antenna group has the (2i) patterns in the beam sweeping operation including steps S210, S211, and S212. Can be predicted. In addition, when the second reception beam formed in the second antenna group in the beam sweeping operation has (2i-1)th patterns, power of signals expected to be received may be predicted.

In addition, step S216 further includes a relationship in which the wireless communication device analyzes a relationship between a channel corresponding to the first reception beam and a channel corresponding to the second reception beam, and the wireless communication device performs step S216 based on the analysis result. can do.

The wireless communication device determines a cell candidate group composed of cells that are likely to be selected as effective cells from among a plurality of cells by using the powers of the signals measured in step S213 and the powers of the signals predicted in step S216, and has reliability among the cell candidates. The highest cell may be selected as an effective cell (S217). Specifically, the wireless communication device may determine cells respectively corresponding to signals having powers greater than or equal to the first threshold value as a cell candidate group from the powers of the signals. The wireless communication device selects an effective cell from the cell candidate group through various methods, such as a method of measuring the correlation between signals received through optimal reception beams of each of the cells from the cells of the cell candidate group and the correlation between reference signals (or synchronization signals). You can choose. The optimal reception beams may include a first reception beam and a second reception beam having a pattern in which a signal received from a cell is measured or predicted with the largest power in the wireless communication device.

The wireless communication device may check the validity of the selected valid cell (S218). That is, since the prediction step S216 is included in the cell search operation according to the embodiments of the present disclosure, the reliability of the cell search operation may be improved by checking the validity of the selected effective cell. In an exemplary embodiment, the wireless communication device determines whether a specific value (e.g., a correlation) based on selection of a valid cell exceeds a second threshold or specific values of cells other than the valid cell of the cell candidate group. Validity can be checked by determining whether a difference between a specific value of a valid cell exceeds a third threshold value. For example, the wireless communication device determines that a valid cell is valid when a specific value of a valid cell exceeds a second threshold or a difference between a specific value of the valid cell and a specific value of other cells exceeds a third threshold. can do.

When the selected valid cell is valid (S218, Yes), the wireless communication device can decode a signal (e.g., PBCH (Physical Broadcast Channel)) received from the valid cell, and when decoding is successful, optimal reception of the valid cell By selecting patterns corresponding to the beams as reception beam patterns, wireless communication with an effective cell may be performed.

When the selected valid cell is invalid (S218, No), the wireless communication device may select the j-th beam pattern from among the plurality of patterns (S220). The wireless communication device may map the j-th beam pattern to the first antenna group and the second antenna group of the phased array, respectively (S221). The wireless communication device may measure power of signals received through reception beams formed in the first antenna group and the second antenna group (S223). The wireless communication device can determine whether'j' is'M' (S224), and when'j' is not'M' (S224, No), counts up'j' (S222), step S220 may be followed. When'j' is'M' (S224, Yes), the wireless communication device determines a cell candidate group consisting of cells that are likely to be selected as effective cells from among a plurality of cells using the powers of the signals measured in step S223, A cell having the highest reliability among the cell candidate groups may be selected as an effective cell (S225). Thereafter, the wireless communication device can decode a signal (e.g., PBCH (Physical Broadcast Channel)) received from the selected effective cell, and upon successful decoding, select patterns corresponding to the effective cell as reception beam patterns and It is possible to perform wireless communication with.

12A and 12B are diagrams for explaining a method of selecting a reception beam pattern of the processor 130 of FIG. 2 according to exemplary embodiments of the present disclosure. Hereinafter, for convenience of description, it is described on the premise that the reception beam pattern for the optimal reception beams of the effective cell is selected, and this method can also be applied to selecting the reception beam pattern for the optimal reception beams of other cells. It is clear.

2 and 12A, the processor 130 may control the first reception beam and the second reception beam to have the same reception beam pattern. As described above, the processor 130 performs a beam sweeping operation to receive first signals and second signals from an effective cell through a first receive beam and a second receive beam, respectively, and powers of the first signals and Powers of the second signals may be measured, and powers of third signals and fourth signals that can be received through the first and second receive beams may be predicted.

In an exemplary embodiment, the processor 130 adds powers corresponding to the same pattern from the measured powers of the first signals and the predicted powers of the fourth signals, respectively, and the measured powers of the second signals and the predicted powers. Powers corresponding to the same pattern may be summed from the powers of the third signals. The processor 130 may select a pattern having the largest summation power as the reception beam pattern based on the summation result. For example, the processor 130 may select the'P3' pattern as the reception beam pattern (RX_P _SEL ), and accordingly, the processor 130 may be connected to the first antenna group 112 and the second antenna group 114. The phase array 110 may be controlled to form a first receiving beam and a second receiving beam each having a'P3' pattern by providing each beam control signal B_CS. Thereafter, the wireless communication device 100 may receive a data signal from an effective cell through a first receiving beam and a second receiving beam each having a'P3' pattern, and further, the wireless communication device 100 By selecting the 'pattern as the transmission beam pattern TX_P _SEL , the data signal may be transmitted through the first transmission beam and the second transmission beam each having a'P3' pattern in an effective cell.

Referring further to FIG. 12B, unlike FIG. 12A, the processor 130 may control the first reception beam and the second reception beam to have different reception beam patterns. The processor 130 may determine a pattern corresponding to the signal having the greatest power as the reception beam pattern of the first reception beam, based on the measured powers of the first signals and the predicted powers of the fourth signals. A pattern corresponding to the signal having the greatest power may be determined as the reception beam pattern of the second reception beam based on the powers of the second signals and the predicted powers of the fourth signals. For example, the processor 130 may select the'P3' pattern as the reception beam pattern (RX_P _SEL ) of the first reception beam, and the'P2' pattern as the reception beam pattern (RX_P _SEL ) of the second reception beam. have. Accordingly, the processor 130 provides a beam control signal B_CS to the first antenna group 112 and the second antenna group 114, respectively, to provide a first receiving beam having a'P3' pattern and a'P2' pattern, respectively. And it is possible to control the phased array 110 to form a second receiving beam. Thereafter, the wireless communication device 100 may receive a data signal from an effective cell through a first receiving beam and a second receiving beam each having a'P3' pattern and a'P2' pattern, and further, the wireless communication device ( 100) selects the'P3' pattern and the'P2' pattern as the transmission beam pattern (TX_P _SEL ), and data through the first and second transmission beams each having a'P3' pattern and a'P2' pattern in an effective cell. Can transmit signals.

FIG. 13 is a flowchart illustrating a method of selecting a reception beam pattern by the processor 130 of FIG. 2 according to an exemplary embodiment of the present disclosure.

2 and 13, the processor 130 may apply a weight to each of the powers of the measured signals and the powers of the predicted signals (S300). For example, the processor 130 may apply different weights to powers of measured signals and powers of predicted signals in consideration of a communication environment between the wireless communication device 100 and cells. The weight may be obtained from a look-up table stored in a memory (not shown) of the wireless communication device 100 or from a machine learning model applied to the wireless communication device 100.

The processor 130 may select a reception beam pattern based on the weighted powers (S310). That is, the processor 130 may select a reception beam pattern according to the embodiments described in FIGS. 12A and 12B based on the weighted powers.

14 is a block diagram illustrating an electronic device 1000 according to an exemplary embodiment of the present disclosure.

Referring to FIG. 14, the electronic device 1000 includes a memory 1010, a processor unit 1020, an input/output control unit 1040, a display unit 1050, an input device 1060, and a communication processing unit 1090. Can include. Here, there may be a plurality of memories 1010. Each component is as follows.

The memory 1010 may include a program storage unit 1011 that stores a program for controlling an operation of an electronic device, and a data storage unit 1012 that stores data generated during program execution. The data storage unit 1012 may store data necessary for the operation of the application program 1013 and the reception beam selection program 1014. The program storage unit 1011 may include an application program 1013 and a fast beam selection program 1014. Here, the program included in the program storage unit 1011 is a set of instructions and may be expressed as an instruction set.

The application program 1013 includes an application program running on an electronic device. That is, the application program 1013 may include an instruction of an application driven by the processor 1022. The fast beam selection program 1014 may perform a beam sweeping operation for a selected part of a plurality of patterns using reception beams having different polarization directions according to embodiments of the present disclosure, and a channel relationship between signals having different polarization directions. A series of processes such as analysis and power prediction of signals expected to be received may be performed.

The peripheral device interface 1023 may control a connection between the input/output peripheral device of the base station and the processor 1022 and the memory interface 1021. The processor 1022 controls the base station to provide a corresponding service by using at least one software program. In this case, the processor 1022 may execute at least one program stored in the memory 1010 and provide a service corresponding to the corresponding program.

The input/output control unit 1040 may provide an interface between an input/output device such as the display unit 1050 and the input device 1060 and the peripheral device interface 1023. The display unit 1050 displays state information, input characters, moving pictures and still pictures. For example, the display unit 1050 may display application program information driven by the processor 1022.

The input device 1060 may provide input data generated by selection of an electronic device to the processor unit 1020 through the input/output control unit 1040. In this case, the input device 1060 may include a keypad including at least one hardware button and a touch pad for sensing touch information. For example, the input device 1060 may provide touch information, such as a touch, a touch movement, and a touch release, sensed through a touch pad, to the processor 1022 through the input/output controller 1040. The electronic device 1000 may include a communication processing unit 1090 that performs a communication function for voice communication and data communication. The communication processing unit 1090 may include at least one phase array, and the fast beam selection program 1014 performs an operation such as a beam sweeping operation, a reception beam selection operation, and a cell search according to embodiments of the present disclosure. The communication processing unit 1090 can be controlled.

As described above, exemplary embodiments have been disclosed in the drawings and specification. In the present specification, the embodiments have been described using specific terms, but these are only used for the purpose of describing the technical idea of the present disclosure, and are not used to limit the meaning or the scope of the present disclosure described in the claims. . Therefore, those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical scope of the present disclosure should be determined by the technical spirit of the appended claims.

Claims (20)

In the operating method of a wireless communication device comprising a phased array (Phased Array) provided with a first antenna group and a second antenna group to form a beam for transmitting and receiving polarized signals in different directions,
Receiving first signals polarized in a first direction by sweeping a first reception beam formed in the first antenna group to have first patterns among a plurality of patterns;
Receiving second signals polarized in a second direction by sweeping a second reception beam formed in the second antenna group to have second patterns among the plurality of patterns;
Measuring powers of the first signals and powers of the second signals;
Analyzing a relationship between a channel corresponding to the first reception beam and a channel corresponding to the second reception beam;
When the first reception beam is swept to have patterns other than the first patterns among the plurality of patterns, powers of third signals expected to be received through the first antenna group and the second reception beam Predicting powers of fourth signals expected to be received through the second antenna group when being swept to have patterns other than the second patterns among the plurality of patterns based on the analysis result; And
A wireless communication device comprising the step of selecting a reception beam pattern for wireless communication using powers of the first signals, powers of the second signals, powers of the third signals, and powers of the fourth signals Method of operation. The method of claim 1,
Analyzing the relationship between the channel corresponding to the first reception beam and the channel corresponding to the second reception beam,
Power of a first comparison signal received through the first reception beam having a reference pattern among the first patterns and a second comparison signal received through the second reception beam having the reference pattern among the second patterns The method of operating a wireless communication device, further comprising the step of calculating a ratio between the powers of. The method of claim 2,
Predicting the powers of the third signals and the powers of the fourth signals,
And calculating powers of the third signals and powers of the fourth signals by applying the power ratio to powers of the first signals and powers of the second signals. How the device works. The method of claim 1,
Analyzing the relationship between the channel corresponding to the first reception beam and the channel corresponding to the second reception beam,
Setting one of the first patterns and the second patterns as a reference pattern based on the measurement result;
Additionally receiving a first comparison signal by forming a reception beam having the reference pattern through the first antenna group or the second antenna group;
Measuring power of the first comparison signal; And
And calculating a ratio between the pre-measured power of the second comparison signal having the reference pattern and the power of the first comparison signal. The method of claim 1,
Analyzing the relationship between the channel corresponding to the first reception beam and the channel corresponding to the second reception beam,
Receiving a first comparison signal through a third reception beam formed on some of the antenna elements included in the first antenna group and having a reference pattern;
Receiving a second comparison signal through a fourth reception beam formed on some of the antenna elements included in the second antenna group and having the reference pattern;
Measuring power of the first comparison signal and power of the second comparison signal; And
And calculating the ratio between the power of the first comparison signal and the power of the second comparison signal. The method of claim 5,
Analyzing the relationship between the channel corresponding to the first reception beam and the channel corresponding to the second reception beam,
A method of operating a wireless communication device, characterized in that preceding or following the step of receiving the first signals and the step of receiving the second signals. The method of claim 1,
A method of operating a wireless communication device, comprising performing a sweeping operation on the first reception beam and a sweeping operation on the second reception beam in parallel. The method of claim 7,
A sweeping operation on the first reception beam and a sweeping operation on the second reception beam so that an angle between the simultaneously formed first reception beam and the second reception beam is equal to or greater than a first reference value. How to operate a wireless communication device. The method of claim 7,
A sweeping operation on the first reception beam and a sweeping operation on the second reception beam so that an angle between the simultaneously formed first reception beam and the second reception beam is less than or equal to a second reference value. How to operate a wireless communication device. The method of claim 1,
The step of selecting the reception beam pattern,
Summing powers corresponding to the same pattern from powers of the first signals and powers of the fourth signals, respectively;
Summing powers corresponding to the same pattern from powers of the second signals and powers of the third signals, respectively;
And selecting any one pattern from among the plurality of patterns based on the summation result. The method of claim 1,
The step of selecting the reception beam pattern,
Selecting one of the plurality of patterns based on powers of the first signals and powers of the fourth signals as a pattern for the first reception beam; And
The operation of the wireless communication device, further comprising selecting one of the plurality of patterns based on the powers of the second signals and the powers of the third signals as a pattern for the second reception beam. Way. The method of claim 1,
And selecting the received beam pattern selected for the wireless communication as a transmission beam pattern. In the cell search method of a wireless communication device,
Receiving first signals polarized in a first direction by sweeping the first reception beam to have first patterns among a plurality of patterns;
Receiving second signals polarized in a second direction by sweeping a second reception beam to have second patterns among the plurality of patterns;
Measuring powers of the first signals and powers of the second signals;
Calculating a ratio between the power of the first comparison signal and the power of the second comparison signal respectively corresponding to at least one reference pattern overlapping the first patterns and the second patterns;
As the first reception beam is swept to have patterns other than the first patterns among the plurality of patterns, the powers of the third signals expected to be received and the second reception beam are the plurality of patterns. Predicting powers of fourth signals expected to be received as they are swept to have patterns other than the second patterns based on the calculation result; And
Selecting a candidate cell and a reception beam pattern by using the powers of the first signals, the powers of the second signals, the powers of the third signals, and the powers of the fourth signals. Cell navigation method. The method of claim 13,
The cell search method of a wireless communication device, wherein the number of the first patterns and the number of the second patterns are the same. The method of claim 13,
The cell search method of a wireless communication device, wherein the first patterns and the second patterns are set such that a correlation between the first reception beam and the second reception beam is less than or equal to a reference value. The method of claim 13,
The cell search method of a wireless communication device, wherein the first patterns and the second patterns are set such that the accuracy of the prediction operation is equal to or greater than a reference value. The method of claim 13,
Performing a validity check on the selected candidate cell; And
And re-performing the cell search based on the result of the validity check. The method of claim 17,
Computing a ratio between the power of the first comparison signal and the power of the second comparison signal,
When the ratio between the power of the first comparison signal and the power of the second comparison signal is out of a reference range, resetting any one of the first patterns and the second patterns to a reference pattern based on the measurement result ;
Additionally receiving a third comparison signal through the first reception beam or the second reception beam having the reset reference pattern;
Measuring power of the third comparison signal; And
And calculating a ratio between the previously measured power of the fourth comparison signal having the reset reference pattern and the power of the third comparison signal. A phased array including a first antenna group and a second antenna group to form a beam for transmitting and receiving signals polarized in different directions; And
Sweeping control so that a first reception beam formed in the first antenna group has first patterns among a plurality of patterns, and a second reception beam formed in the second antenna group has second patterns among the plurality of patterns Including a processor,
The processor,
Powers of first signals polarized in a first direction received through the first receiving beam and powers of second signals polarized in a second direction received through the second receiving beam are measured, and the measurement result is Powers of third signals expected to be received through the first antenna group and the second reception when the first reception beam is swept to have patterns other than the first patterns among the plurality of patterns using When a beam is swept to have patterns other than the second patterns among the plurality of patterns, powers of fourth signals expected to be received through the second antenna group are predicted, and the measurement result and the prediction result Wireless communication device, characterized in that preparing for wireless communication based on. The method of claim 19,
The processor,
A ratio between the power of the first comparison signal and the power of the second comparison signal respectively corresponding to at least one reference pattern overlapping the first patterns and the second patterns is calculated, and the second comparison signal is A wireless communication device, characterized in that predicting powers of three signals and powers of the fourth signals.

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