Repeater having PLMN detector function and signal processing method using same

Abstract

Disclosed are a repeater having a PLMN detector function and a signal processing method using same. The signal processing method using a repeater having a PLMN detector function according to an embodiment of the present application may comprise the steps of: (a) acquiring a plurality of base station signals received from a plurality of base stations, respectively; (b) demodulating the plurality of base station signals and evaluating the signal quality of each of the plurality of base station signals; (c) selecting a target base station corresponding to a donor from among the plurality of base stations on the basis of the evaluated signal qualities; and (d) relaying and outputting a target base station signal received from the target base station.

Description

Repeater equipped with PLMN detector function and signal processing method using the same

[0001] The present invention relates to a repeater equipped with a PLMN detector function and a signal processing method using the same.

[0002] A repeater is a device that relays wireless signals between a base station and a terminal to improve communication quality in dead zones; a typical repeater operates by receiving a signal from a specific base station, amplifying it, and then retransmitting it.

[0003] These repeaters may be equipped with a modem for the purpose of monitoring and controlling the operating status of the equipment; specifically, the modem is utilized for monitoring and control purposes, such as transmitting the output status or operation status of the repeater to a server.

[0004] However, in the case of repeaters equipped with modems, there is a limitation in that the modem can only process signals from a single base station, making it impossible to simultaneously analyze signals from multiple base stations and select the optimal signal. Furthermore, since the modem is an expensive component, it is a major factor in increasing the overall manufacturing cost of the repeater.

[0005] Furthermore, modem-based repeaters face technical limitations that make it difficult to implement advanced functions, such as optimizing antenna direction in real time or eliminating unwanted base station interference signals, which acts as a constraint on improving communication quality.

[0006] The technology forming the background of the present invention is disclosed in Korean Published Patent Application No. 10-2020-0005467.

[0007] The present invention aims to solve the problems of the aforementioned conventional technology by providing a repeater equipped with a PLMN detector function that can simultaneously receive and analyze multiple base station signals and select the optimal signal without using a modem, and a signal processing method using the same.

[0008] The present invention aims to solve the problems of the aforementioned conventional technology by providing a repeater equipped with a PLMN detector function capable of minimizing interference by eliminating unnecessary base station synchronization signals, and a signal processing method using the same.

[0009] The present invention aims to solve the problems of the aforementioned conventional technology by providing a repeater equipped with a PLMN detector function that can improve communication quality by automatically controlling the tilt angle of an antenna based on the signal quality of a base station signal, and a signal processing method using the same.

[0010] However, the technical problems that the embodiments of the present invention aim to solve are not limited to the technical problems described above, and other technical problems may exist.

[0011] As a technical means for achieving the above-mentioned technical problem, a signal processing method using a repeater having a PLMN detector function according to one embodiment of the present invention may include: (a) acquiring a plurality of base station signals received from each of a plurality of base stations; (b) demodulating the plurality of base station signals and evaluating the signal quality of each of the plurality of base station signals; (c) selecting a target base station corresponding to a donor among the plurality of base stations based on the evaluated signal quality; and (d) relaying and outputting a target base station signal received from the target base station.

[0012] In addition, the above step (a) can identify the network of each of the plurality of base stations using a PLMN (Public Land Mobile Network) detector function.

[0013] Additionally, the above step (d) may include a step of controlling the tilt angle of the antenna module based on the reception quality of the target base station signal.

[0014] In addition, steps (a) to (d) above can be performed using a Field Programmable Gate Array (FPGA) mounted on the repeater.

[0015] In addition, step (b) above can calculate the signal quality for each of the plurality of base station signals using at least one of RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), and SINR (Signal to Interference plus Noise Ratio).

[0016] In addition, step (c) above may select the target base station among base stations where the evaluated signal quality exceeds a preset threshold.

[0017] Additionally, the above step (d) may include the step of removing the synchronization signal of the remaining base stations, excluding the target base station, among the plurality of base stations.

[0018] Meanwhile, a signal processing device provided in a repeater having a PLMN detector function according to one embodiment of the present invention may include a signal input unit for acquiring a plurality of base station signals received from each of a plurality of base stations, a quality measurement unit for demodulating the plurality of base station signals and evaluating the signal quality of each of the plurality of base station signals, and a relay execution unit for selecting a target base station corresponding to a donor among the plurality of base stations based on the evaluated signal quality and relaying and outputting a target base station signal received from the target base station.

[0019] In addition, the signal input unit can identify the network of each of the plurality of base stations using a PLMN (Public Land Mobile Network) detector function.

[0020] In addition, the relay execution unit may include an antenna control unit that controls the tilt angle of the antenna module based on the reception quality of the target base station signal.

[0021] In addition, the quality measurement unit can calculate the signal quality for each of the plurality of base station signals using at least one of RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), and SINR (Signal to Interference plus Noise Ratio).

[0022] In addition, the relay execution unit may select the target base station among base stations whose evaluated signal quality exceeds a preset threshold.

[0023] In addition, the relay execution unit may include an interference removal unit that removes the synchronization signals of the remaining base stations, excluding the target base station, among the plurality of base stations.

[0024] In addition, the operation of each of the signal input unit, the quality measurement unit, and the relay execution unit can be performed using a Field Programmable Gate Array (FPGA) mounted on the relay.

[0025] The means for solving the problem described above are merely exemplary and should not be interpreted as intended to limit the present invention. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and the detailed description of the invention.

[0026] According to the means for solving the problem of the present invention described above, a repeater equipped with a PLMN detector function that can simultaneously receive and analyze multiple base station signals and select the optimal signal by implementing a PLMN detector function without using a modem, and a signal processing method using the same can be provided.

[0027] According to the means for solving the problem of the present invention described above, a repeater equipped with a PLMN detector function capable of minimizing interference by removing unnecessary base station synchronization signals and a signal processing method using the same can be provided.

[0028] According to the means for solving the problem of the present invention described above, a repeater equipped with a PLMN detector function capable of improving communication quality by automatically controlling the tilt angle of an antenna based on the signal quality of a base station signal, and a signal processing method using the same can be provided.

[0029] According to the means for solving the problem of the present invention described above, the manufacturing cost of the repeater can be reduced by implementing the PLMN detector function using an FPGA, etc., without equipping it with a modem.

[0030] According to the solution to the problem of the present invention described above, market competitiveness can be secured in countries implementing a comprehensive licensing system, such as Japan, by enabling the efficient operation of repeaters without a modem.

[0031] However, the effects obtainable from this invention are not limited to those described above, and other effects may exist.

[0032] FIG. 1 is a schematic diagram of a repeater-based communication system having a repeater having a PLMN detector function according to one embodiment of the present invention.

[0033] FIG. 2 is a conceptual diagram showing the operation flow of a repeater equipped with a PLMN detector function according to one embodiment of the present invention.

[0034] FIG. 3 is a conceptual diagram showing a function performed by a Field Programmable Gate Array (FPGA) module provided in a repeater having a PLMN detector function according to one embodiment of the present invention.

[0035] FIG. 4 is a schematic diagram of a signal processing device using a repeater having a PLMN detector function according to one embodiment of the present invention.

[0036] FIG. 5 is a detailed configuration diagram of a relay execution unit of a signal processing device using a relay equipped with a PLMN detector function according to one embodiment of the present invention.

[0037] FIG. 6 is an operation flowchart of a signal processing method using a repeater equipped with a PLMN detector function according to one embodiment of the present invention.

[0038] Embodiments of the present invention are described below with reference to the attached drawings to enable those skilled in the art to easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals.

[0039] Throughout this specification, when a part is described as being "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are "electrically connected" or "indirectly connected" with other elements interposed between them.

[0040] Throughout the entire specification, when a component is described as being located "on," "on top," "on top," "under," "on bottom," or "on bottom" of another component, this includes not only cases where the component is in contact with the other component but also cases where another component exists between the two components.

[0041] Throughout this specification, when a part is described as "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0042] The present invention relates to a repeater equipped with a PLMN detector function and a signal processing method using the same.

[0043] FIG. 1 is a schematic diagram of a repeater-based communication system having a repeater having a PLMN detector function according to one embodiment of the present invention.

[0044] Referring to FIG. 1, a repeater-based communication system (10) according to one embodiment of the present invention may include a repeater (1) having a PLMN detector function according to one embodiment of the present invention (hereinafter referred to as 'repeater (1)'), a base station device (200), and a user terminal (300).

[0045] The repeater (1), base station device (200), and user terminal (300) can communicate with each other through a network (20). The network (20) refers to a connection structure that enables information exchange between each node, such as terminals and servers. Examples of such a network (20) include, but are not limited to, a 3GPP (3rd Generation Partnership Project) network, an LTE (Long Term Evolution) network, a 5G network, a WIMAX (World Interoperability for Microwave Access) network, the Internet, a LAN (Local Area Network), a Wireless LAN (Wireless Local Area Network), a WAN (Wide Area Network), a PAN (Personal Area Network), a Wi-Fi network, a Bluetooth network, a satellite broadcasting network, an analog broadcasting network, and a DMB (Digital Multimedia Broadcasting) network.

[0046] In particular, referring to FIG. 1, the network (20) may include a plurality of base stations (200A, ..., 200N) each forming a cell for transmitting a signal to a user terminal (300), and may include a user terminal (300) that receives a signal through a repeater (1) using any one of the plurality of cells formed by the plurality of base stations (200A, ..., 200N).

[0047] The user terminal (300) can be any type of wireless communication device, such as a smartphone, smartpad, tablet PC, PCS (Personal Communication System), GSM (Global System for Mobile communication), PDC (Personal Digital Cellular), PHS (Personal Handyphone System), PDA (Personal Digital Assistant), IMT (International Mobile Telecommunication)-2000, CDMA (Code Division Multiple Access)-2000, W-CDMA (W-Code Division Multiple Access), Wibro (Wireless Broadband Internet) terminal.

[0048] Meanwhile, in the description of the embodiment of the present invention, the base station device (200) is equipped with a base station antenna capable of transmitting and receiving wireless signals through a network (20), and may be arranged to form a cell corresponding to the service area of ​​the base station antenna. In particular, each base station device (200) may have a unique network code, a PLMN ID (Public Land Mobile Network Identification), and the PLMN ID may be composed of a combination of an MCC (Mobile Country Code) and an MNC (Mobile Network Code).

[0049] Additionally, the base station device (200) can operate to transmit wireless signals including PSS (Primary Synchronization Signal), SSS (Secondary Synchronization Signal), and various control signals through the repeater (1) to a user terminal (300) located within its cell area.

[0050] Below, the specific functions and operations of the repeater (1) will be described in detail with reference to FIGS. 2 and FIGS. 3.

[0051] FIG. 2 is a conceptual diagram showing the operation flow of a repeater equipped with a PLMN detector function according to one embodiment of the present invention.

[0052] Referring to FIG. 2, a repeater (1) according to one embodiment of the present invention can receive wireless signals from a plurality of base stations (200A, ..., 200N) and perform a process of detecting and processing donor information in stages. Specifically, the repeater (1) can receive base station signals and perform signal demodulation. Afterward, in the quality measurement stage, the signal quality of each base station signal, such as RSRP, RSRQ, and SINR, is evaluated, and based on the evaluated signal quality, an optimal target base station can be selected in the donor selection stage. In addition, when the donor selection is completed, the repeater (1) can optimize the reception of the selected target base station signal through antenna tilt control, and after performing synchronization signal generation and interference removal, can output a final signal.

[0053] FIG. 3 is a conceptual diagram showing a function performed by a Field Programmable Gate Array (FPGA) module provided in a repeater having a PLMN detector function according to one embodiment of the present invention.

[0054] Referring to FIG. 3, the FPGA module (11) of the repeater (1) according to one embodiment of the present invention can perform multiple stages of signal processing functions. The FPGA module (11) may include a module (sub-component) that receives a signal input through an antenna, and a module (sub-component) that demodulates the received signal and converts it into a form that can be processed.

[0055] Additionally, the FPGA module (11) may include a module (sub-component) that evaluates signal quality by calculating RSRP, RSRQ, and SINR of the demodulated signal, and a module (sub-component) that selects an optimal donor signal based on the measured quality data. Additionally, the FPGA module (11) may include a module (sub-component) that controls antenna tilt using the selected donor information, and a PN Canceller module for generating a synchronization signal and eliminating interference.

[0056] For reference, in the description of the embodiments of the present invention, the signal processing device (100) may be configured identically to the FPGA module (11), or, according to an embodiment of the present invention, may be a sub-configuration implemented within the FPGA module (11) to perform all or part of the processing functions described above.

[0057] The signal processing device (100) can acquire multiple base station signals received from each of the multiple base stations (200A, ..., 200N).

[0058] Specifically, the signal processing device (100) can identify each network of a plurality of base stations (200A, ..., 200N) using a PLMN (Public Land Mobile Network) detector function.

[0059] For reference, in the description of the embodiments of the present invention, the PLMN detector (Public Land Mobile Network Detector) function may refer to a function that searches for and identifies communication networks that a device can currently connect to. Conventionally, such PLMN detector functions have been primarily utilized to implement roaming, network selection, and handover in mobile terminals. In the case of repeaters, there have been instances where a modem equipped with a PLMN detector function was installed and utilized for monitoring and control purposes, such as transmitting the output status or operation status of the repeater to a server, but the PLMN detector function itself was not utilized.

[0060] In contrast to this, the repeater (1) disclosed herein has a unique feature in that, instead of separately equipping a modem which is expensive equipment, it is equipped with an FPGA module (11) capable of performing PLMN detector functions to directly perform operator identification and network selection, integrated analysis and evaluation of multiple base station signals, and donor selection at the repeater end.

[0061] In addition, the signal processing device (100) can demodulate a plurality of acquired base station signals and evaluate the signal quality of each of the plurality of base station signals.

[0062] Specifically, the signal processing device (100) can calculate signal quality for each of a plurality of base station signals using at least one of RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), and SINR (Signal to Interference plus Noise Ratio).

[0063] Among the parameters for evaluating signal quality, RSRP (Reference Signal Received Power) may be an indicator representing the power strength of a reference signal received from a base station. In this regard, the signal processing device (100) may measure the power of the reference signal included in the base station signal and convert it into dBm units to calculate the RSRP value.

[0064] In addition, among the parameters for evaluating signal quality, RSRQ (Reference Signal Received Quality) may be an indicator representing the quality of the reference signal relative to the total received power. In this regard, the signal processing device (100) can calculate the RSRQ value by dividing the measured RSRP value by the power of the total received bandwidth, and this can be expressed in dB units.

[0065] Additionally, among the parameters for evaluating signal quality, SINR (Signal to Interference plus Noise Ratio) may be an indicator representing the ratio of the strength of the desired signal to the interference signal and noise. In this regard, the signal processing device (100) can calculate the SINR value by dividing the power of the desired signal by the sum of the powers of the interference signals and the sum of the noise powers.

[0066] Additionally, the signal processing device (100) can select a target base station corresponding to a donor among a plurality of base stations (200A, ..., 200N) based on the evaluated signal quality. For example, the signal processing device (100) can select a target base station among base stations where the evaluated signal quality exceeds a preset threshold.

[0067] More specifically, according to one embodiment of the present invention, a signal processing device (100) can select a donor signal by comprehensively analyzing RSRP, RSRQ, and SINR values ​​calculated for each of a plurality of base station signals. Specifically, base station signals that satisfy all of the allowable ranges or threshold values ​​(e.g., RSRP > -110 dBm, RSRQ > -15 dB, SINR > 0 dB, etc.) that are pre-set for each parameter can be primarily selected. Subsequently, the device can operate to select the signal with the highest SINR value among the selected base station signals as the final donor signal, but is not limited thereto.

[0068] According to another embodiment of the present invention, the signal processing device (100) can calculate a comprehensive quality index by applying a pre-set weight to each parameter. Specifically, a comprehensive quality index according to a pre-set scoring system is calculated by applying different weights to each of RSRP, RSRQ, and SINR, and a target base station can be selected according to the ranking of the comprehensive quality index. At this time, the weight of each parameter may be adjusted according to the installation environment or purpose of use of the repeater (1), and the transformation function for calculating the quality index may be either a linear or a non-linear function.

[0069] In this case, regarding the weights set for each parameter, for example, when the repeater (1) is installed indoors, signal strength degradation due to wall attenuation, etc., may be a major consideration, so the weight of 'RSRP' is set relatively high; on the other hand, when the repeater (1) is installed in an urban area where many base stations are densely concentrated, the impact of interference may be relatively greater, so the weight of 'SINR' may be set relatively high. As another example, when the repeater (1) is installed in a moving vehicle, etc., and operates in an environment where handovers occur frequently, the weight of 'RSRQ' may be set high to prioritize overall communication quality.

[0070] However, this is not limited thereto, and it goes without saying that the weights applied to each quality evaluation element (parameter) considered for evaluating the signal quality of a base station signal can be set in various ways according to the embodiments of the present invention.

[0071] In addition, according to one embodiment of the present invention, the signal processing device (100) may select and manage N base stations (e.g., 3, etc.) with the highest signal quality among a plurality of base station signals as a candidate donor group. In addition, the signal processing device (100) may operate to continuously monitor the signal quality of the base stations included in the candidate donor group, and to re-select the optimal donor in real time as a change in signal quality occurs, thereby relaying the signal to the user terminal (300). Through this candidate donor group-based signal relay, the relay device (1) is able to provide a stable relay service even in situations where the signal quality of a specific base station is temporarily degraded.

[0072] Specifically, the signal processing device (100) can measure the signal quality of each base station within the candidate donor group at preset monitoring cycles. If the signal quality of the current donor drops below a preset quality difference threshold compared to other candidate base stations during a preset number of consecutive measurements, the donor can be switched to that candidate base station. Additionally, the signal processing device (100) can store the history whenever a donor switch occurs and analyze the switching pattern during a preset history management period to reflect it in the management of the candidate donor group.

[0073] At this time, the monitoring period of the signal quality can be dynamically set according to the operating environment of the repeater (1). Specifically, the signal processing device (100) can respond quickly to changes in signal quality by setting the monitoring period short when the rate of change in signal quality in the previous monitoring result exceeds a preset reference value. Conversely, if the signal quality is maintained stably for a certain period of time, the monitoring period can be set long to reduce the computational load of the repeater (1). In addition, the monitoring period can also be adjusted according to external factors such as changes in distance between the base station and the repeater (1) or changes in weather.

[0074] In addition, the signal processing device (100) can relay and output a target base station signal received from a selected target base station.

[0075] According to one embodiment of the present invention, a signal processing device (100) can control the tilt angle of an antenna module provided in a repeater (1) based on the reception quality of a target base station signal.

[0076] For example, the signal processing device (100) can automatically control the tilt angle of the antenna module based on the RSRP value of the selected target base station signal. Specifically, the signal processing device (100) can fine-tune the tilt angle of the antenna in the direction where the RSRP value is maximized, and the antenna tilt control can be performed not only in the vertical direction but also in the horizontal direction, thereby optimizing the reception sensitivity of the target base station signal.

[0077] In this regard, according to one embodiment of the present invention, a signal processing device (100) can monitor changes in RSRP values ​​while sequentially adjusting the tilt angle of an antenna in preset tilt adjustment units. An optimal angle can be searched by scanning within a preset upper and lower angle limit range in the vertical direction and within a preset left and right angle limit range in the horizontal direction. In particular, if the RSRP value decreases continuously by a preset number of times, the scanning direction can be reversed to efficiently search for the optimal point. At this time, the tilt angle search can be performed based on a binary search algorithm, thereby reducing the time required to search for the optimal angle.

[0078] In addition, according to one embodiment of the present invention, the signal processing device (100) can remove the synchronization signal of the remaining base stations excluding the selected target base station among the plurality of base stations (200A, ㆍㆍㆍ, 200N).

[0079] Specifically, the signal processing device (100) can use a Pseudo Noise (PN) Canceller to remove synchronization signals from base stations other than the target base station. Specifically, the synchronization signals to be removed may include a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a reference signal for RSRP measurement. By identifying and removing these synchronization signals, the PN Canceller can improve the SINR of the target base station signal and minimize interference.

[0080] In this regard, the PN Canceller can identify the unique PN sequence of each base station through correlation analysis of the received synchronization signal. Based on the identified PN sequence, the interference signal can be reconstructed and removed from the received signal according to a preset interference cancellation algorithm. At this time, the degree of interference cancellation can be performed repeatedly until a preset SINR target value is reached, and the optimal number of iterations can be determined by considering the trade-off between the amount of computation and the interference cancellation performance during this process.

[0081] Here, the PN (Pseudo Noise) sequence is a unique identification code used to distinguish each base station and can be included in the PSS / SSS synchronization signal, and the PN Canceller mounted on the FPGA module (11) of the repeater (1) disclosed herein can perform interference cancellation by utilizing the characteristics of this PN sequence.

[0082] Specifically, the signal processing device (100) can detect the PN sequence of each base station in the received signal and identify the PN sequences of other base stations excluding the target base station. The identified PN sequences are used to reconstruct the synchronization signal of the corresponding base station, and the reconstructed synchronization signals can be subtracted from the original received signal to eliminate interference. In this process, the signal processing device (100) can accurately estimate the strength and phase of the interference signal through correlation analysis between the PN sequence of each base station and the received signal, thereby enabling more precise interference elimination.

[0083] For example, in one embodiment of the present invention, the signal processing device (100) is positioned such that the repeater (1) can receive signals from three base stations (200A, 200B, 200C), and when base station A is selected as the target base station, the synchronization signals (PSS, SSS) and reference signals (signals for RSRP measurement) of base stations B and C can be selectively removed to selectively relay only the signal of the target base station A, thereby improving the quality of the relayed signal and effectively removing unnecessary interference. In particular, this synchronization signal removal process is performed in real time by a PN Canceller implemented in an FPGA module (11).

[0084] In particular, the signal processing device (100) disclosed herein and the repeater (1) equipped with the signal processing device (100) can provide market competitiveness in that they enable the repeater to be operated efficiently without a modem in countries that implement a comprehensive licensing system, such as Japan.

[0085] Specifically, under the comprehensive licensing system operated in countries such as Japan, it is not mandatory to install a modem in the repeater. Therefore, by implementing the PLMN detector function described in detail above based on the FPGA module (11), additional costs associated with installing a modem can be reduced. In particular, considering that 4G / 5G modems account for a significant portion of the manufacturing cost of the repeater, the signal processing device (100) disclosed herein can replace such expensive modems, thereby ensuring price competitiveness of the product.

[0086] In addition, the repeater (1) disclosed in this invention has the advantage of being free from modem supply issues, allowing for a stable product supply, and can also have an advantage in terms of Total Cost of Ownership as there are no modem upgrade or maintenance costs. This is expected to lead to significant cost savings, especially in projects requiring large-scale repeater installation.

[0087] FIG. 4 is a schematic diagram of a signal processing device using a repeater having a PLMN detector function according to one embodiment of the present invention.

[0088] Referring to FIG. 4, the signal processing device (100) may include a signal input unit (110), a quality measurement unit (120), and a relay execution unit (130).

[0089] The signal input unit (110) can acquire multiple base station signals received from each of the multiple base stations (200A, ..., 200N).

[0090] Specifically, the signal input unit (110) can identify each network of a plurality of base stations (200A, ..., 200N) using a PLMN (Public Land Mobile Network) detector function.

[0091] The quality measurement unit (120) can demodulate multiple base station signals obtained and evaluate the signal quality of each of the multiple base station signals.

[0092] Specifically, the quality measurement unit (120) can calculate the signal quality for each of the plurality of base station signals using at least one of RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), and SINR (Signal to Interference plus Noise Ratio).

[0093] The relay execution unit (130) can select a target base station corresponding to a donor among a plurality of base stations (200A, ..., 200N) based on the signal quality evaluated by the quality measurement unit (120).

[0094] For example, the relay execution unit (130) can select a target base station among base stations whose evaluated signal quality exceeds a preset threshold.

[0095] The relay execution unit (130) can relay and output a target base station signal received from a selected target base station.

[0096] FIG. 5 is a detailed configuration diagram of a relay execution unit of a signal processing device using a relay equipped with a PLMN detector function according to one embodiment of the present invention.

[0097] Referring to FIG. 5, the relay execution unit (130) may include an antenna control unit (131) and an interference removal unit (132).

[0098] The antenna control unit (131) can control the tilt angle of the antenna module provided in the repeater (1) based on the reception quality of the target base station signal.

[0099] The interference removal unit (132) can remove the synchronization signal of the remaining base stations, excluding the selected target base station among the plurality of base stations (200A, ㆍㆍㆍ, 200N).

[0100] Below, based on the details described above, we will briefly examine the operation flow of the present invention.

[0101] FIG. 6 is an operation flowchart of a signal processing method using a repeater equipped with a PLMN detector function according to one embodiment of the present invention.

[0102] A signal processing method using a repeater equipped with a PLMN detector function as illustrated in FIG. 6 can be performed by the signal processing device (100) described above. Therefore, even if the details are omitted below, the description of the signal processing device (100) can be applied in the same way to the description of the signal processing method using a repeater equipped with a PLMN detector function.

[0103] Referring to FIG. 6, in step S11, the signal input unit (110) can acquire a plurality of base station signals received from each of the plurality of base stations (200A, ..., 200N).

[0104] Specifically, in step S11, the signal input unit (110) can identify each network of a plurality of base stations (200A, ..., 200N) using a PLMN (Public Land Mobile Network) detector function.

[0105] Next, in step S12, the quality measurement unit (120) can demodulate the acquired multiple base station signals and evaluate the signal quality of each of the multiple base station signals.

[0106] Specifically, in step S12, the quality measurement unit (120) can calculate the signal quality for each of the plurality of base station signals using at least one of RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), and SINR (Signal to Interference plus Noise Ratio).

[0107] Next, in step S13, the relay execution unit (130) can select a target base station corresponding to the donor among a plurality of base stations (200A, ..., 200N) based on the signal quality evaluated in step S12.

[0108] For example, in step S13, the relay execution unit (130) can select a target base station among base stations whose evaluated signal quality exceeds a preset threshold.

[0109] Next, in step S14, the relay execution unit (130) can relay and output a target base station signal received from a selected target base station.

[0110] For example, in step S14, the antenna control unit (131) can control the tilt angle of the antenna module provided in the repeater (1) based on the reception quality of the target base station signal.

[0111] Additionally, in step S14, the interference removal unit (132) can remove the synchronization signal of the remaining base stations among the plurality of base stations (200A, ..., 200N), excluding the target base station selected in step S13.

[0112] Meanwhile, according to one embodiment of the present invention, steps S11 to S14 may be performed using a Field Programmable Gate Array (FPGA) module (11) mounted on a repeater (1).

[0113] In the description above, steps S11 through S14 may be further divided into additional steps or combined into fewer steps according to an embodiment of the present invention. Additionally, some steps may be omitted as necessary, and the order of the steps may be changed.

[0114] A signal processing method using a repeater equipped with a PLMN detector function according to one embodiment of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., either individually or in combination. The program instructions recorded on the medium may be those specifically designed and configured for the present invention, or may be those known and available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes; optical recording media such as CD-ROMs and DVDs; magneto-optical media such as floptical disks; and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, and flash memory. Examples of program instructions include machine code, such as that generated by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc. The above-described hardware device may be configured to operate as one or more software modules to perform the operation of the present invention, and vice versa.

[0115] In addition, the signal processing method using a repeater equipped with the aforementioned PLMN detector function can also be implemented in the form of a computer program or application executed by a computer stored on a recording medium.

[0116] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical concept or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0117] The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and the concept of equivalents thereof should be interpreted as being included within the scope of the present invention.

Claims

1. A signal processing method using a repeater equipped with a PLMN detector function, (a) A step of acquiring a plurality of base station signals received from each of a plurality of base stations; (b) a step of demodulating the plurality of base station signals and evaluating the signal quality of each of the plurality of base station signals; (c) a step of selecting a target base station corresponding to a donor among the plurality of base stations based on the signal quality evaluated above; and (d) a step of relaying and outputting a target base station signal received from the above target base station, A signal processing method including 2. In Paragraph 1, The above step (a) is, A signal processing method that identifies each of the multiple base stations using a PLMN (Public Land Mobile Network) detector function.

3. In Paragraph 1, The above step (d) is, A step of controlling the tilt angle of the antenna module based on the reception quality of the target base station signal, A signal processing method that includes 4. In Paragraph 1, A signal processing method characterized in that the above steps (a) to (d) are performed using a Field Programmable Gate Array (FPGA) mounted on the repeater.

5. In Paragraph 1, The above step (b) is, A signal processing method that calculates the signal quality for each of the plurality of base station signals using at least one of RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), and SINR (Signal to Interference plus Noise Ratio).

6. In Paragraph 1, The above step (c) is, A signal processing method comprising selecting a target base station among base stations whose evaluated signal quality exceeds a preset threshold value.

7. In Paragraph 1, The above step (d) is, A step of removing the synchronization signal of the remaining base stations excluding the target base station among the plurality of base stations, A signal processing method that includes 8. A signal processing device provided in a repeater having a PLMN detector function, A signal input unit for acquiring multiple base station signals received from each of the multiple base stations; A quality measurement unit that demodulates the plurality of base station signals and evaluates the signal quality of each of the plurality of base station signals; and A relay execution unit that selects a target base station corresponding to a donor among the plurality of base stations based on the signal quality evaluated above, and relays and outputs a target base station signal received from the target base station, A signal processing device including 9. In Paragraph 8, The above signal input unit is, A signal processing device that identifies each of the plurality of base stations using a PLMN (Public Land Mobile Network) detector function.

10. In Paragraph 8, The above relay execution unit is, An antenna control unit that controls the tilt angle of the antenna module based on the reception quality of the target base station signal, A signal processing device that includes 11. In Paragraph 8, The above quality measurement unit, A signal processing device that calculates the signal quality for each of the plurality of base station signals using at least one of RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), and SINR (Signal to Interference plus Noise Ratio).

12. In Paragraph 8, The above relay execution unit is, A signal processing device that selects a target base station among base stations whose evaluated signal quality exceeds a preset threshold.

13. In Paragraph 8, The above relay execution unit is, An interference removal unit that removes the synchronization signal of the remaining base stations excluding the target base station among the plurality of base stations, A signal processing device that includes 14. In Paragraph 8, A signal processing device characterized in that the operation of each of the signal input unit, the quality measurement unit, and the relay execution unit is performed using a Field Programmable Gate Array (FPGA) mounted on the relay.

15. A computer-readable recording medium storing a program for executing a method according to any one of paragraphs 1 through 7 on a computer.

Images