Apparatus and method for counting connection events using random access signal detection based on correlation in mobile communication repeater

Abstract

A connection event counting device according to an embodiment of the present disclosure is applied to a mobile communication relay device coupled with a base station in a mobile communication network and comprises: a signal branching unit that branches a portion of the uplink signal from the path of the uplink signal; and a digital integrated signal processing unit that converts the branched uplink signal into a digital signal, detects a random connection signal based on a correlation operation from the uplink signal, and determines a connection event of a mobile communication terminal using the detected random connection signal. The digital integrated signal processing unit comprises: an analog-to-digital conversion unit that generates a first digital uplink data by digitally converting the branched uplink signal; a digital preprocessing unit that generates a second digital uplink data by filtering the generated first digital uplink data into a frequency band including the random connection signal and performing decimation to convert the sampling rate; and a correlation-based random connection signal detection unit that detects the random connection signal by performing a correlation operation with a reference sequence on the second digital uplink data. and may include a connection event determination unit that determines a connection event by accumulating the number of detections of the random connection signal detected by the random connection signal detection unit over time.

Description

Technology Field

[0001] The disclosed content relates to a connection event counting device and method applicable to wireless communication systems, particularly mobile communication relay devices such as RF repeaters and distributed antenna systems, which reliably determine and count actual connection attempts of a mobile communication terminal through the analysis of uplink signals including uplink random connection signals. Background Technology

[0003] Unless otherwise indicated in this specification, the contents described in this section are not prior art for the claims of this application, and are not to be recognized as prior art simply because they are included in this section.

[0004] In environments operating RF repeaters or Distributed Antenna Systems (DAS), quantitatively determining the frequency and scale of actual network connection attempts by mobile terminals within the device's service area is critical for network operation, equipment optimization, and quality control. However, conventional technologies have primarily relied on methods that indirectly estimate the presence of mobile terminals or traffic levels based on simple power indicators such as the Radio Signal Strength Indicator (RSSI). This approach has limitations, as it is sensitive to changes in noise and interference environments, and it is difficult to reliably determine connection events because a rise in RSSI does not necessarily signify an actual connection attempt by a mobile terminal.

[0005] Meanwhile, a technique has been proposed to control the operating state of a device by referencing the fact that an uplink random connection signal exists in an RF repeater or distributed antenna system. In some techniques, cases have been reported where the characteristic of the uplink signal power momentarily increasing at the time of transmission of the random connection signal is utilized to release the output muting state of the repeater or as a control trigger to ensure stability in an ICS (On-Channel Interference Cancellation System) environment. However, such techniques utilize the random connection signal merely at the level of "presence" and do not perform the function of precisely detecting the reference sequence of the random connection signal based on correlation calculations or reliably counting terminal connection events by statistically analyzing it.

[0006] In addition, 3GPP standards define a structure in which a network-controlled repeater (NCR) or relay device transmits a random connection signal on its own to connect with a base station, but this applies to cases where the repeater or relay device acts as a terminal and is essentially different from the function of detecting and analyzing the random connection signal transmitted by a general mobile communication terminal at the RF repeater or distributed antenna system level to quantify connection attempts.

[0007] Therefore, in conventional RF repeater or distributed antenna systems, no technology has been disclosed that accurately detects random connection signals based on correlation calculations and reliably determines and counts them as connection events through temporal repeatability and statistical structures (such as K-in-W).

[0008] Accordingly, there is a need for a technology that can reliably detect random connection signals at the RF repeater or distributed antenna system level without a separate demodulation function, and based on this, reliably determine the connection attempts of actual mobile communication terminals and provide them as quantitative indicators. Prior art literature

[0010] Republic of Korea Published Patent Application No. 10-2005-0024135 (March 10, 2005) The problem to be solved

[0011] The present disclosure aims to provide a connection event counting device and method capable of providing quantitative data for network optimization (such as expansion, relocation, removal of devices, and power saving through power control) in the coverage area of ​​an RF repeater or distributed antenna system by counting connection events to solve the aforementioned problems. means of solving the problem

[0013] A connection event counting device according to an embodiment of the present disclosure is applied to a mobile communication relay device coupled with a base station in a mobile communication network and comprises: a signal branching unit that branches a portion of the uplink signal from the path of the uplink signal; and a digital integrated signal processing unit that converts the branched uplink signal into a digital signal, detects a random connection signal based on a correlation operation from the uplink signal, and determines a connection event of a mobile communication terminal using the detected random connection signal. The digital integrated signal processing unit comprises: an analog-to-digital conversion unit that generates a first digital uplink data by digitally converting the branched uplink signal; a digital preprocessing unit that generates a second digital uplink data by filtering the generated first digital uplink data into a frequency band including the random connection signal and performing decimation to convert the sampling rate; and a correlation-based random connection signal detection unit that detects the random connection signal by performing a correlation operation with a reference sequence on the second digital uplink data. and may include a connection event determination unit that determines a connection event by accumulating the number of detections of the random connection signal detected by the random connection signal detection unit over time.

[0014] In one embodiment, the digital integrated signal processing unit further includes a buffering unit that stores the second digital uplink data, which is digitally preprocessed and output by the digital preprocessing unit, for a certain period of time; and the random connection signal detection unit may be characterized by detecting the random connection signal by performing a correlation operation on the second digital uplink data stored in the buffering unit.

[0015] In one embodiment, the digital integrated signal processing unit further includes an energy-based detection unit that selects as a candidate region a section in which the energy level among the second digital uplink data stored in the buffering unit increases by more than a predetermined value relative to the reference noise level; and the random connection signal detection unit may be characterized by detecting the random connection signal by performing a correlation operation only on the second digital uplink data corresponding to the candidate region. Effects of the invention

[0017] A connection event counting device according to an embodiment of the present disclosure can reliably secure a random connection signal of the uplink without a separate external receiving device by directly branching and acquiring an uplink signal through a signal branching unit installed in the uplink path of a mobile communication device, and can provide an implementation structure applicable to actual commercial environments.

[0018] In addition, the digital integrated signal processing unit performs analog-to-digital conversion and digital preprocessing, and by including a buffer unit that stores the signal for a certain period of time, precise detection based on correlation operations can be performed by referencing the corresponding signal segment even after signals existing in the form of instantaneous bursts, such as random connection signals, have already passed. Accordingly, the possibility of missed detections due to the limitations of simple real-time processing is reduced, and stable detection reliability can be secured through a buffering-based parallel processing structure.

[0019] In addition, by combining energy-based (RSSI-based) primary detection with correlation-based precision detection, computational efficiency can be improved by reducing unnecessary correlation operations, while simultaneously reducing false positives that may occur in noisy and interference environments. In particular, lightweighting and improved reliability can be achieved simultaneously through a configuration in which energy-based detection selects candidate regions and correlation-based detection precisely verifies random connection signals.

[0020] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description of the invention or the claims. Brief explanation of the drawing

[0022] FIG. 1 is a configuration diagram of a connection event counting device according to an embodiment of the present disclosure. FIG. 2 is a configuration diagram of a digital integrated signal processing unit of a connection event counting device according to an embodiment of the present disclosure. FIG. 3 is a conceptual diagram of a portion of the reference sequence of a connection event counting device according to an embodiment of the present disclosure. FIG. 4 is a flowchart of the K-in-W determination logic of a connection event counting device in another embodiment of the present disclosure. FIG. 5 is a flowchart of a connection event counting method in another embodiment of the present disclosure. Specific details for implementing the invention

[0023] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols will be assigned the same reference number, and redundant descriptions thereof will be omitted. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably solely for the ease of drafting the specification and do not inherently possess distinct meanings or roles. Furthermore, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in this specification, such detailed description will be omitted. Additionally, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification; the technical concept disclosed in this specification is not limited by the attached drawings, and it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the invention.

[0024] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0025] In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0027] Hereinafter, a connection event counting device and method according to an embodiment of the present disclosure will be described in detail with reference to the drawings.

[0028] FIG. 1 is a configuration diagram of a connection event counting device according to an embodiment of the present disclosure, FIG. 2 is a configuration diagram of a digital integrated signal processing unit (200) of a connection event counting device according to an embodiment of the present disclosure, FIG. 3 is a conceptual diagram of a portion of a reference sequence of a connection event counting device according to an embodiment of the present disclosure, and FIG. 4 is a flowchart of a K-in-W determination logic of a connection event counting device according to another embodiment of the present disclosure. Referring to FIG. 1, a connection event counting device according to an embodiment of the present disclosure may include a signal branching unit (100) and a digital integrated signal processing unit (200).

[0029] The signal branching unit (100) can function to branch off a portion of the uplink signal from the path of the uplink signal transmitted from a mobile communication terminal to a base station in a mobile communication network. In this specification, “uplink signal” refers to a wireless signal transmitted from a mobile communication terminal toward a base station and may include various physical channel signals such as a random access signal. In this specification, “random access signal” refers to a signal transmitted when a mobile communication terminal attempts to connect to a base station for the first time and may include PRACH (Physical Random Access Channel) defined in the 3GPP standard for LTE or NR systems.

[0030] The signal branching unit (100) may be a coupler or tap that branches an RF signal at a certain ratio. The signal branching unit (100) may branch an uplink signal input in the form of an RF signal through the service antenna of a mobile communication relay device, transmit a portion of it to the digital integrated signal processing unit (200) described later, and transmit the remainder to the amplifier unit of the mobile communication relay device. The signal branching unit (100) may be configured to have an appropriate coupling ratio so that sufficient signal quality can be secured for the detection of a random connection signal thereafter, without affecting the original relay function and amplification operation of the mobile communication relay device. The coupling ratio may be set by considering the system noise figure, the gain of the subsequent amplifier, the number of bits of the analog-to-digital converter (210), and the target SNR. As an example, the coupling ratio may be set in the range of 10 dB to 30 dB, but is not limited thereto.

[0031] In one embodiment, the signal branching unit (100) may include an RF front-end unit capable of performing signal level adjustment, frequency conversion, and noise suppression processes on a portion of the branched uplink signal. The RF front-end unit may be implemented as a Zero-IF structure or a Low-IF structure as needed; if a Zero-IF structure is used, DC component correction and I / Q imbalance correction may be performed, and if a Low-IF structure is used, image removal and channel filtering may be performed.

[0032] Additionally, the RF front-end section may include a variable gain amplifier (VGA) and, if necessary, an automatic gain control (AGC) function to correct for fluctuations in the received signal level and enable stable digital conversion within the full-scale range of the analog-to-digital converter (210) described later. This prevents the saturation of the analog-to-digital converter (210) caused by the input of the uplink signal, and conversely, suppresses the increase in quantization noise caused by excessively low input power of the uplink signal. This can be advantageous for stably maintaining the signal-to-noise ratio (SNR) for detecting random connection signals.

[0033] In addition, a band-limiting filter or a low-pass filter (LPF) may be included to remove unnecessary spectrum components and noise outside the frequency band of the random connection signal, and this can reduce the load of the digital preprocessing unit (220) described later and improve the detection performance of the random connection signal.

[0034] In this manner, the uplink signal, with its SNR, signal level, and band appropriately controlled at the RF front-end, is transmitted to the digital integrated signal processing unit (200). The digital integrated signal processing unit (200) then converts the uplink signal into a digital signal to detect a random connection signal based on correlation operations from the uplink signal, determines a connection event of a mobile communication terminal using the detected random connection signal, and performs a statistical processing function for the connection event. In this specification, a “connection event” refers to the act of a mobile communication terminal attempting to connect to a base station by transmitting a random connection signal, and can be determined based on the number of occurrences and temporal distribution of the detected random connection signal.

[0035] Referring to FIG. 2, the digital integrated signal processing unit (200) may include an analog-to-digital conversion unit (210), a digital preprocessing unit (220), a random connection signal detection unit (230), and a connection event determination unit (240).

[0036] The analog-to-digital converter (210) can perform the function of generating first digital uplink data by digitally converting the branched uplink signal. The analog-to-digital converter (210) may be a type of ADC (Analog Digital Converter) capable of generating digital data by digitally converting an analog signal. The sampling rate may use a base station reference sampling rate (e.g., 30.72 Msps, 61.44 Msps).

[0037] The digital preprocessing unit (220) can perform the function of generating second digital uplink data by filtering the first digital uplink data generated by the analog-to-digital conversion unit (210) into a frequency band including a random connection signal and performing decimation to convert the sampling rate. In this specification, “decimation” refers to a processing process that lowers the sampling rate of a digital signal, and is performed after limiting the frequency band to improve computational efficiency without information loss. The generated second digital uplink data has a narrower frequency band and a lower sampling rate compared to the first digital uplink data, so the amount of data can be significantly reduced. As a result, unnecessary correlation operations can be reduced, thereby reducing the amount of computation and improving computational efficiency, and allowing the use of low-resource components, which can reduce the cost of the digital integrated signal processing unit (200).

[0038] The digital preprocessing unit (220) can filter the random connection signal through a digital low-pass filter or band-pass filter having a pass bandwidth of 1.2 to 2 times the band, taking into account that the effective bandwidth of the random connection signal is approximately 1 MHz to several MHz. Through this, the frequency band containing the random connection signal can be sufficiently preserved while effectively suppressing adjacent band noise and interference components.

[0039] As an example, the digital preprocessing unit (220) can reduce the sampling rate to 3.84 Msps or 1.92 Msps by setting the decimation ratio to 8 or 16 when the input sampling rate is 30.72 Msps, and can convert to the same level of sampling rate by setting the decimation ratio to 16 or 32 when the input sampling rate is 61.44 Msps. This can reduce the amount of computation and memory usage while maintaining the time resolution required for the detection of random connection signals. The aforementioned decimation ratio is merely an example and is not limited thereto.

[0040] The random connection signal detection unit (230) can perform the function of detecting a random connection signal by performing a correlation operation with a reference sequence on the second digital uplink data generated by the digital preprocessing unit (220). In this specification, “correlation operation” refers to an operation that calculates the similarity between the second digital uplink data generated from the uplink signal and the reference sequence (the reference sequence of the random connection signal), and can be implemented using a complex inner product or convolution method.

[0041] The random connection signal detection unit (230) may be configured to detect random connection signals using a partial correlation method that performs correlation operations only on a part of the reference sequence, rather than on the entire section.

[0042] Referring to FIG. 3, some sections of the reference sequence may be set as sections with relatively high energy levels, sections where autocorrelation characteristics are distinct, or sections corresponding to periodic patterns. The reference sequence is generally composed of a structured sequence of a certain length, and since the sequence possesses sufficient correlation characteristics for each section, effective detection performance can be secured by selecting a length of at least a certain length and performing correlation operations, even without using the entire sequence.

[0043] In one embodiment, the partial correlation method may be implemented by dividing a reference sequence into a plurality of segments and then selecting only some of the segments to perform a correlation operation with the second uplink data. The length of the selected segment may be set to a portion of the total sequence length (e.g., in the range of 30% to 70%), which may be determined by considering the balance between computational load and detection performance. Even in this case, if a valid random connection signal exists, a sufficiently distinct correlation peak is formed in the selected section, while noise or unrelated signals show a random distribution.

[0044] In another embodiment, the partial correlation method may be implemented in the form of a sliding window, and correlation operations may be performed by sequentially moving an analysis window having the same or similar length as the reference sequence over the signal interval. In this case, the window length and the movement interval may be set according to system performance requirements and computational resources, and if a peak greater than a predetermined threshold is detected among the results of the correlation operations calculated at regular intervals, the corresponding point in time may be determined as when a random connection signal has been detected.

[0045] The partial correlation method can significantly reduce computational load and memory access compared to full-segment correlation, offering the advantage of lowering system power consumption and alleviating the burden of real-time processing. In particular, it can be applied very advantageously in equipment environments requiring limited computational resources or low-power operation, such as mobile communication relay devices.

[0046] The connection event counting device according to the embodiment of the present disclosure may be implemented as a two-stage hybrid structure in which a full-length correlation method and a partial correlation method are selectively applied depending on the operating environment and system performance requirements, or in which a partial correlation method is used in the initial detection stage and a full-length correlation method is applied in the final verification stage. Through this, optimal operation that simultaneously satisfies reliability and computational efficiency for the detection of random connection signals may be possible.

[0047] The connection event determination unit (240) can perform the function of determining a connection event by accumulating the number of detections of random connection signals detected by the random connection signal detection unit (230) over time. As can be seen in FIG. 4, the connection event determination unit accumulates and manages the detection results of random connection signals by the random connection signal detection unit (230) on the time axis based on correlation operation, and can determine whether there is a connection event by determining whether the number of detections within a pre-set time window (Window, W) is greater than or equal to a predetermined number of detections (K).

[0048] In one embodiment, the connection event determination unit (240) uses a sliding window method and continuously updates the number of times a random connection signal is detected during the past W time based on the current time. For example, if W is set to 50 ms and K is set to 2, it can be determined that there is a connection event if a random connection signal is detected two or more times during the last 50 ms. This configuration is intended to increase reliability by reflecting environmental characteristics where a single random connection signal is detected multiple times due to delays caused by multipath and mobile communication relay devices.

[0049] In another embodiment, by setting W to a level of several hundred ms to 1 second and K to 2 to 3, the retransmission random connection signal of the mobile communication terminal can be reflected to determine whether a connection attempt is made with higher reliability. The sliding window can be implemented as an overlapping structure, and the window update cycle can be set to match the detection cycle or sample processing cycle of the random connection signal based on correlation operations.

[0050] The time window (Window, W) and the predetermined number of detections (K) can be adjusted according to the operating environment, the scale of the mobile communication relay device, multipath characteristics, and operator policy, and are not limited to the aforementioned values.

[0051] This K-in-W judgment logic does not rely on a single instantaneous detection result; instead, it confirms a connection event only when the detection of a correlation-based random connection signal occurs repeatedly at least a predetermined number of times (K) within a preset time window. By doing so, it effectively suppresses false detections caused by transient interference, accidental noise, or one-off signals, and enables statistically reliable determination of connection events. In particular, this disclosure takes into account the physical characteristics of a mobile communication relay device environment, where a single random connection signal may be detected multiple times with different time delays due to multipath and distribution delays. Accordingly, unlike conventional methods that rely on the detection of a single random connection signal, by using random connection signals repeatedly confirmed within a specific time window as the basis for determining a connection event, false positives caused by simple interference or transient noise are reduced, and only meaningful signals can be reliably extracted in a real-world environment.

[0052] Referring to FIG. 2, the digital integrated signal processing unit (200) of the connection event counting device according to an embodiment of the present disclosure may further include a buffering unit (250) and an energy-based detection unit (260).

[0053] The buffering unit (250) can function to store the second digital uplink data, which is digitally preprocessed and output by the digital preprocessing unit (220), for a certain period of time. The random connection signal detection unit (230) can detect a random connection signal by performing a correlation operation on the second digital uplink data stored in the buffering unit (250). Through this, even after the detection of the random connection signal, a backward analysis is possible by referencing past data of the corresponding section to perform detection based on a correlation operation, which has the effect of structurally reducing the possibility of missed detection due to momentary processing delays or system scheduling influences.

[0054] In one embodiment, the buffering unit (250) may be configured to store a number of second digital uplink data corresponding to 10 ms to 100 ms. For example, when the sampling rate is 1.92 Msps, about 19,200 second digital uplink data correspond to 10 ms, and about 192,000 second digital uplink data correspond to 100 ms. This capacity sufficiently includes the preamble of the random access signal (about 1 ms level) and can even cover time variations caused by multipath and distribution network delays by mobile communication relay devices.

[0055] The energy-based detection unit (260) can perform the function of selecting a section of the second digital uplink data stored in the buffering unit (250) where the energy level increases by more than a predetermined value compared to the reference noise level as a candidate region. The random connection signal detection unit (230) can detect a random connection signal by performing a correlation operation only on the second digital uplink data corresponding to the candidate region.

[0056] The reference noise energy can be set based on the average energy or variance value measured in a section where no random connection signal exists or in an initial learning section. In one embodiment, the energy of the detection section This reference noise energy Cases where the relative increase is approximately 3 dB to 10 dB or more can be identified as candidate regions. This can be expressed by the following formula.

[0058]

[0059] Here, α is approximately 2( 3 dB) to 10 ( It can be set to a coefficient in the range of 10 dB, and the α value can be adjusted according to the operating environment, target false alarm rate, and miss detection rate. In addition, in some embodiments, it can be implemented in a way that dynamically adjusts the threshold value by reflecting real-time fluctuations in noise statistics, such as the CFAR (Constant False Alarm Rate) method.

[0060] In one embodiment, the connection event counting device of the present disclosure may transmit statistical information regarding the time and detection count of a connection event determined by the connection event determination unit (240) to an external server. Here, the external server may be a network management system of a mobile communication operator, but is not limited thereto. By storing and aggregating the determined connection events and providing them as statistical information, the level of actual connection attempts by mobile communication terminals within the service area of ​​the mobile communication relay device can be quantified, and this can be utilized as basic data for network operation optimization, traffic analysis, quality evaluation, and various operational decision-making.

[0061] Referring to FIG. 5, as another embodiment of the present disclosure, a connection event counting method may be performed using a connection event counting device applied to a mobile communication relay device coupled with a base station in a mobile communication network, and comprises the following:

[0062] (A) A step of branching a portion of the uplink signal from the path of the uplink signal;

[0063] (B) A step of generating first digital uplink data by digitally converting the branched uplink signal;

[0064] (C) A step of generating second digital uplink data by performing digital preprocessing to convert the sampling rate by filtering the generated first digital uplink data into a frequency band including a random access signal and performing decimation;

[0065] (D) A step of detecting a random connection signal by performing a correlation operation with a reference sequence on the second digital uplink data; and

[0066] (E) A step of determining a connection event by accumulating the number of detections of a detected random connection signal over time.

[0067] The connection event counting method of the present disclosure may further include (F) a step of storing the second digital uplink data for a certain period of time; and may detect a random connection signal by performing a correlation operation on the second digital uplink data stored in the aforementioned step (D).

[0068] The connection event counting method of the present disclosure may further include (G) a step of selecting a section in which the energy level of the second digital uplink data increases by more than a predetermined value relative to the reference noise level as a candidate region; and may detect a random connection signal by performing a correlation operation only on the second digital uplink data corresponding to the candidate region in the aforementioned step (D).

[0069] In the aforementioned step (D), the random connection signal may be detected using a partial correlation method in which correlation is performed only on a part of the reference sequence, rather than on the entire section.

[0070] The above-described step (E) may be characterized by being performed by a K-in-W determination logic that confirms a connection event only when the number of detections of a random connection signal within a preset time window (Window) occurs repeatedly more than a predetermined number (K).

[0071] The connection event counting method of the present disclosure may further include the step of (H) transmitting statistical information regarding the time and detection count of a confirmed connection event to an external server.

[0073] The disclosed content is merely illustrative and can be modified and implemented in various ways by a person skilled in the art without departing from the gist of the claim in the patent claims; therefore, the scope of protection of the disclosed content is not limited to the specific embodiments described above. Explanation of the symbols

[0075] 100: Signal branch 200: Digital Integrated Signal Processing Unit 210: Analog-to-Digital Converter 220: Digital Preprocessing Unit 230: Random connection signal detection unit 240: Connection Event Judgment Unit 250: Buffering section 260: Energy-based detection unit

Claims

Claim 1 A connection event counting device applied to a mobile communication relay device coupled with a base station in a mobile communication network, comprising: a signal branching unit that branches off a portion of the uplink signal from the path of the uplink signal; A digital integrated signal processing unit that converts the branched uplink signal into a digital signal, detects a random connection signal based on a correlation operation from the uplink signal, and determines a connection event of a mobile communication terminal using the detected random connection signal; wherein the digital integrated signal processing unit includes: an analog-to-digital conversion unit that generates first digital uplink data by digitally converting the branched uplink signal; a digital preprocessing unit that generates second digital uplink data by filtering the generated first digital uplink data into a frequency band including the random connection signal and performing decimation to convert the sampling rate; a buffering unit that stores the second digital uplink data, which is digitally preprocessed and output by the digital preprocessing unit, for a certain period of time; an energy-based detection unit that selects a section among the second digital uplink data stored in the buffering unit where the energy level increases by more than a predetermined value compared to a reference noise level as a candidate region; and a unit that performs a correlation operation with a reference sequence on the second digital uplink data corresponding to the candidate region to determine the random connection signal A connection event counting device comprising: a random connection signal detection unit based on a correlation operation for detection; and a connection event determination unit that determines a connection event by accumulating the number of detections of the random connection signal detected by the random connection signal detection unit over time. Claim 2 delete Claim 3 delete Claim 4 A connection event counting device according to claim 1, wherein the random connection signal detection unit is configured to detect the random connection signal using a partial correlation method that performs correlation operations only on a part of a reference sequence rather than on the entire section. Claim 5 A connection event counting device according to claim 1, wherein the connection event determination unit includes a K-in-W determination logic that determines a connection event only when the number of detections of the random connection signal within a preset time window (Window) occurs repeatedly more than a predetermined number (K). Claim 6 A connection event counting device according to claim 5, characterized by transmitting statistical information regarding the time and detection count of the connection event determined by the connection event determination unit to an external server. Claim 7 A method for counting connection events using a connection event counting device applied to a mobile communication relay device coupled with a base station in a mobile communication network, comprising: (A) a step of branching a portion of the uplink signal from the path of the uplink signal; (B) a step of generating a first digital uplink data by digitally converting the branched uplink signal; (C) a step of generating a second digital uplink data by filtering the generated first digital uplink data into a frequency band including a random connection signal and performing digital preprocessing to convert the sampling rate by performing decimation; (F) a step of storing the second digital uplink data for a certain period of time; (G) a step of selecting a section among the second digital uplink data in which the energy level increases by more than a predetermined value compared to a reference noise level as a candidate region; (D) a step of detecting the random connection signal by performing a correlation operation with a reference sequence on the second digital uplink data corresponding to the candidate region; and (E) a step of determining a connection event by accumulating the number of detections of the detected random connection signal over time; a connection event counting method comprising. Claim 8 delete Claim 9 delete Claim 10 A connection event counting method according to claim 7, characterized in that the random connection signal is detected in the step (D) using a partial correlation method in which the correlation operation is performed only on a part of the reference sequence, rather than on the entire section. Claim 11 A connection event counting method according to claim 7, characterized by being performed by a K-in-W determination logic that determines a connection event only when the number of detections of the random connection signal within a preset time window (Window) in step (E) occurs repeatedly more than a predetermined number (K). Claim 12 A connection event counting method according to claim 11, further comprising the step of (H) transmitting statistical information regarding the time and detection count of the confirmed connection event to an external server.

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