Wireless transceiver and method for transmitting bi-directional auxiliary signals thereof

Abstract

A wireless transceiver device for wirelessly transmitting a bidirectional auxiliary signal between a host and a client using a time division duplex (TDD) method according to the present invention comprises: a signal strength measuring unit for measuring the strength of a wired input signal or a wirelessly transmitted signal; an operation state determining unit for determining a current operation state as a transmission state or a reception state based on the measured signal strength; a transmitter that wirelessly transmits data corresponding to the input signal in an ON state when the operation state is determined to be a transmission state, and switches to an OFF state when the operation state is determined to be a reception state; and a receiver that switches to an OFF state when the operation state is determined to be a transmission state, and receives the wirelessly transmitted signal in an ON state when the operation state is determined to be a reception state.

Description

Technology Field

[0001] The present invention relates to a wireless transceiver and a method for transmitting a bidirectional auxiliary signal therefrom, and more specifically, to a device and method for wirelessly transmitting a bidirectional auxiliary signal between a host and a client using a time division duplex (TDD) method. Background Technology

[0002] Figure 1 is a diagram illustrating the structure of data transmission and reception between a host and a client.

[0003] Conventionally, in order to transmit data generated by a host (10) to a client (20) or to transmit response data generated by a client (0) to a host (11), a digital modem circuit (11, 21) is installed inside each device, and a communication protocol based thereon is necessarily applied. In this structure, data transmission control performed between the host (10) and the client (20) is dependent on the packet processing and protocol of the digital modem (11, 21), and a digital signal processing circuit and its auxiliary circuit are necessarily required.

[0004] Figure 2 is a diagram illustrating a conventional time division duplex (TDD) based bidirectional data transmission method.

[0005] In the conventional TDD method, for example, when a host (Source) generates data and intends to transmit it, it switches to Request mode at time t1; at this time, the client enters a Wait state and receives the data after detecting it. Subsequently, at time t2, the operating mode is reversed by switching logic, and the client (Sink) side switches to Response mode to transmit response data; the host then receives the response data after detecting it while in a Wait state. As such, the TDD communication method has a structure in which transmission and reception operations alternate depending on the time interval.

[0006] However, in conventional methods, since all such operational control is performed via digital logic and digital modems, the original signal must be converted into a packet format for transmission rather than transmitted as is. In other words, the transmitted data must include packet control information such as a preamble and header; consequently, this leads to increased unnecessary overhead compared to analog raw data and a decrease in overall data throughput. Furthermore, the addition of digital modems and protocol processing circuits increases the hardware complexity of the device and presents limitations in terms of power consumption and chip area. Prior art literature

[0007] Published Patent Application No. 10-2012-0010665 (February 6, 2012) The problem to be solved

[0008] Embodiments of the present invention aim to provide a wireless transceiver and a bidirectional auxiliary signal transmission method thereof, which can implement efficient analog TDD bidirectional communication without digital logic by automatically controlling transceiver operation based on transmission and reception signal strengths.

[0009] However, the technical problem that this embodiment aims to solve is not limited to the technical problem described above, and other technical problems may exist. means of solving the problem

[0010] As a technical means for achieving the aforementioned technical problem, a wireless transceiver device for wirelessly transmitting a bidirectional auxiliary signal between a host and a client in a time division duplex (TDD) manner according to the first aspect of the present invention comprises: a signal strength measuring unit for measuring the strength of a wired input signal or a wirelessly transmitted signal; an operation state determining unit for determining a current operation state as a transmission state or a reception state based on the measured signal strength; a transmitter that wirelessly transmits data corresponding to the input signal in an ON state when the operation state is determined to be a transmission state, and switches to an OFF state when the operation state is determined to be a reception state; and a receiver that switches to an OFF state when the operation state is determined to be a transmission state, and receives the wirelessly transmitted signal in an ON state when the operation state is determined to be a reception state.

[0011] In some embodiments of the present invention, the transmitter and the receiver may each be connected to the host and the client by a single wired data line.

[0012] In some embodiments of the present invention, the transmitter and receiver are integrated on a single chip and can perform transmission and reception of input signals by sharing the single data line.

[0013] In some embodiments of the present invention, the transmitter transmits the wireless signal in an analog form without packetizing the input data, and the receiver can transmit the wireless signal directly to a host or client without packet decoding.

[0014] In some embodiments of the present invention, the signal strength measuring unit measures the strength of the input signal through TSSI as the input signal is transmitted from the source side to the sink side during the request period, and the operation state determining unit determines whether the transmission state is based on the measured signal strength, and when the transmission state is determined, the transmitter maintains an ON state to wirelessly transmit data corresponding to the input signal according to the control of the operation state determining unit, and the receiver may be controlled to an OFF state during the request period so as not to perform a receiving function.

[0015] In some embodiments of the present invention, the signal strength measuring unit measures the strength of the wireless signal via RSSI at the sink side receiving the wireless signal transmitted during the request period, and the operation state determining unit determines whether a reception state exists based on the measured signal strength, and when a reception state is determined, the receiver maintains an ON state to receive data corresponding to the wireless signal according to the control of the operation state determining unit, and the transmitter may be controlled to an OFF state during the request period.

[0016] In some embodiments of the present invention, the signal strength measuring unit measures the strength of the input signal through TSSI as the input signal is transmitted from the sink side to the source side in the response section after the request section, and the operation state determining unit determines whether the transmission state is based on the measured signal strength, and when the transmission state is determined, the transmitter maintains an ON state to wirelessly transmit data corresponding to the input signal according to the control of the operation state determining unit, and the receiver may be controlled to an OFF state during the response section so as not to perform a receiving function.

[0017] In some embodiments of the present invention, the signal strength measuring unit measures the strength of the wireless signal through RSSI at the source side receiving the wireless signal transmitted during the response interval, and the operation state determining unit determines whether a reception state is present based on the measured signal strength, and when a reception state is determined, the receiver maintains an ON state to receive data corresponding to the wireless signal according to the control of the operation state determining unit, and the transmitter may be controlled to an OFF state during the response interval.

[0018] Additionally, a method for wirelessly transmitting a bidirectional auxiliary signal between a host and a client using a time division duplex (TDD) method according to the second aspect of the present invention comprises: a step of measuring the current signal strength using TSSI or RSSI at a wireless transceiver; a step of determining the current operation as a transmission state or a reception state based on the measured signal strength; a step of wirelessly transmitting input data by controlling the transmitter to an ON state and the receiver to an OFF state when the transmission state is determined; a step of receiving input data by controlling the transmitter to an OFF state and the receiver to an ON state when the reception state is determined; and a step of transmitting the transmitted or received data to a host or client through a single data line.

[0019] In addition to this, other methods for implementing the present invention, other systems, and computer-readable recording media for recording a computer program for executing said method may be further provided. Effects of the invention

[0020] According to one embodiment of the present invention described above, TDD communication can be performed without the need for a digital modem or complex control logic that was previously required, and there are advantages such as simplified device design and stable data transmission and reception.

[0021] Furthermore, since the present invention does not require additional digital logic or modem circuits, the circuit area of ​​the transmitting and receiving device can be minimized, thereby reducing operating power. In addition, by transmitting pure analog raw data without undergoing a packetization process during data transmission, the problem of reduced data throughput that occurred in existing digital modem-based methods can be resolved. This enables efficient data transmission even in high-speed communication environments.

[0022] Furthermore, the present invention can be applied directly to existing wired bidirectional communication applications and can be efficiently utilized in various standard environments using TDD-based bidirectional AUX signals, such as Display Port, RS-485, and USB 3.x.

[0023] Therefore, by realizing low-power and high-efficiency simplified analog TDD communication, the present invention can provide the effect of simultaneously improving the hardware complexity and data processing efficiency problems associated with existing digital modem-based communication methods.

[0024] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by a person skilled in the art from the description below. Brief explanation of the drawing

[0025] Figure 1 is a diagram illustrating the structure of data transmission and reception between a host and a client. Figure 2 is a diagram illustrating a conventional time division duplex (TDD) based bidirectional data transmission method. Figure 3 is a diagram illustrating the data path in a typical wireless transceiver. Figure 4 is a diagram illustrating the problems of a wireless transceiver on a single line. Figure 5 is a diagram illustrating the concept of wirelessly transmitting and receiving bidirectional auxiliary signals in a 4-Lane DP (DisplayPort) environment. FIG. 6 is a drawing for explaining a wireless transceiver device according to an embodiment of the present invention. FIG. 7 is a diagram illustrating a time table for bidirectional auxiliary signal transmission in one embodiment of the present invention. FIG. 8 is a flowchart of a bidirectional auxiliary signal transmission method according to one embodiment of the present invention. Specific details for implementing the invention

[0026] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the present invention, and the present invention is defined only by the scope of the claims.

[0027] The terms used in this specification are for describing embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. The terms "comprises" and / or "comprising" used in this specification do not exclude the presence or addition of one or more other components in addition to the components mentioned. Throughout the specification, the same reference numerals refer to the same components, and "and / or" includes each of the mentioned components and all combinations of one or more. Although terms such as "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical scope of the invention.

[0028] Unless otherwise defined, all terms used herein (including technical and scientific terms) may be used in a meaning commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0029] FIG. 3 is a diagram illustrating the data path in a typical wireless transceiver (31, 32).

[0030] A typical wireless transceiver (31, 32) is connected to a host (30) and a client (33), respectively, and each wireless transceiver (31, 32) includes a transmitter (TX) and a receiver (RX). At this time, the transmitter and the receiver each have independent paths (path, a1, b1), and on the host (30) side, the path for the transmitter and the path for the receiver are configured separately (a1, b1), and on the client (33) side, independent paths (a1, b1) are also provided for the transmitter and the receiver, respectively. That is, the conventional wireless transceiver (31, 32) separately provides dedicated lines and circuits so that the transmission and reception signals do not interfere with each other.

[0031] In this structure, when the host (30) transmits an auxiliary signal to the client (33), the transmitter of the host (30) transmits data through a transmitter path (a1), and the receiver on the client (33) side detects the transmission signal through an independent reception path (a1) and transmits the received data into the client (33). Similarly, when the client (33) transmits a response signal to the host (30), the transmitter of the client (33) and the receiver of the host (30) exchange data through independent paths (b1).

[0032] As such, in a conventional structure based on the premise that the transmission path and the reception path are performed through independent lines (a1, b1) that are physically separated from each other, multiple transmission and reception circuits and lines (a1, b1) are necessarily required within each device (31, 32). While this structure is easy to implement because the transmission and reception paths are already separated when wireless, it has some disadvantages in terms of circuit area and miniaturization because multiple wired lines (a1, b1) are required. In contrast, one embodiment of the present invention is characterized by the fact that the host and the client have a single bidirectional line for transmission and reception in a wired connection environment, and is clearly distinguished from the embodiment having independent transmission and reception channels in terms of the scope of application.

[0033] FIG. 4 is a diagram illustrating the problems of wireless transceivers (41, 42) in a single line (a2).

[0034] If you intend to transmit pure analog raw data without going through a packet processing process without digital logic or modem circuits, a loop error may occur if the transmitter (TX) and receiver (RX) are configured to share a single data line (a2) as shown in Fig. 4.

[0035] In other words, since the transmitter and receiver use the same data path, the transmission mode (TX Mode) and reception mode (RX Mode) must be properly controlled according to the time division method. If the transmitter and receiver are active without such mode control, a loop may occur, potentially leading to data errors.

[0036] For example, data generated at the host (40) is transmitted to the transmitter of the wireless transceiver (41) via a single line (a2) and received wirelessly by the receiver of the client (43). The received data is transmitted into the client (43) for processing, and the response data resulting from the processing is transmitted back to the host (40) via the transmitter on the client (43) side.

[0037] However, since a single line (a2) is used at this time, data received by the receiver (RX) of the client (43) can be transmitted to the transmitter (TX) of the client (43) through the same line, and as a result, the host (40) receives the data it transmitted again. Such a data loop can cause unexpected errors and reduce communication reliability. Therefore, mode control of the transmitter and receiver is essential in single-line (a2) based TDD communication.

[0038] To resolve these problems, a wireless transceiver device and a bidirectional auxiliary signal transmission method according to one embodiment of the present invention can implement bidirectional communication in a time division duplex (TDD) manner by checking the strength of a signal input or output to a transceiver chip using a transmit signal strength indicator (TSSI) and a receive signal strength indicator (RSSI), and controlling the operation of a transmitter (TX) and a receiver (RX) according to the situation based on this.

[0039] Hereinafter, a wireless transceiver device (100, 200) according to an embodiment of the present invention will be described with reference to FIGS. 5 to 7.

[0040] Figure 5 is a diagram illustrating the concept of wirelessly transmitting and receiving bidirectional auxiliary signals in a 4-Lane DP (DisplayPort) environment.

[0041] A display device (1) to which an embodiment of the present invention can be applied utilizes a 60 GHz band and can wirelessly transmit and receive 4-pair video signals and 1-pair AUX signals, respectively. The four video signal lanes (2) perform unidirectional communication, and each lane (2) is equipped with a transceiver chip including a transmitter and a receiver. Accordingly, each transceiver lane (2) can transmit video data at a speed of, for example, 8 Gbps.

[0042] On the other hand, since the auxiliary (AUX) signal requires bidirectional communication, transmission and reception must be performed using the time division duplex (TDD) method (2). The wireless transceiver of the present invention can stably implement bidirectional communication by targeting such auxiliary signals, sharing the transmitter (TX) and receiver (RX) as a single data path, and controlling the transmission mode and reception mode appropriately according to the signal strength.

[0043] In addition, the wireless transceiver device (100, 200) of the present invention can transmit a pure analog signal (raw data) without a digital modem or packetization process, thereby preventing the problem of reduced data throughput that may occur in existing digital modem-based methods. For example, an auxiliary signal can be transmitted at a speed of 1 Mbps, and by controlling transmission and reception using the TDD method, data loops can be prevented and stable bidirectional communication can be realized.

[0044] Meanwhile, in general wireless communication systems, complex digital modem circuits and digital logic for error correction are essential to compensate for errors caused by noise, interference, and signal attenuation during long-distance transmission. These digital modems play a role in ensuring communication reliability by performing not only modulation and demodulation functions but also error detection and correction.

[0045] In contrast, the wireless transceiver device (100, 200) in one embodiment of the present invention is preferably configured to operate in an ultra-short-range communication environment using the 60 GHz band. In particular, one embodiment of the present invention is based on an environment in which there are almost no physical obstacles between the wireless transmission devices (100, 200) at a very short transmission distance of several centimeters (cm).

[0046] In other words, since one embodiment of the present invention is defined to operate in an ultra-short distance and low interference environment, the errors that may occur during the transmission process are extremely limited. In such an environment, a sufficient signal-to-noise ratio (SNR) can be secured without high-power amplification or complex error correction functions, and accordingly, data can be stably transmitted without errors using only an analog circuit-based transmission and reception structure.

[0047] Depending on the operating environment, in one embodiment of the present invention, it is possible to adopt a low-dimensional simple modulation method such as ASK (Amplitude Shift Keying) or OOK (On-Off Keying) as a modulation and demodulation method for wireless signals.

[0048] Generally, higher-order modulation schemes such as QPSK, 16QAM, 64QAM, and PAM4 have the advantage of improving transmission efficiency, but implementing them requires complex modem circuits including ADC / DAC, Serializer / Deserializer, and digital signal processing.

[0049] On the other hand, the ASK or OOK modulation method applied in one embodiment of the present invention has the advantage that modulation and demodulation are possible using only analog circuits without a digital modem, as it represents data using only the presence or absence of a signal or changes in amplitude. In particular, in an ultra-short-range communication environment in the 60GHz band, the ASK or OOK method alone can sufficiently satisfy the high-speed data transmission requirements to which the present invention is applied, even without using a higher-order modulation method. FIG. 6 is a drawing for explaining a wireless transceiver device (100, 200) according to one embodiment of the present invention.

[0050] A wireless transceiver device (100, 200) according to one embodiment of the present invention is a device for transmitting and receiving bidirectional auxiliary signals between a host (300) and a client (400) in a time division duplex (TDD) manner. In particular, one embodiment of the present invention enables stable TDD communication without a digital modem or complex control logic, and for this purpose includes a signal strength measuring unit (111, 112, 211, 212), an operation state determining unit (121, 122, 221, 222), a transmitter (130, 230), and a receiver (140, 240).

[0051] Meanwhile, in one embodiment of the present invention, the concepts of Source and Sink are defined as terms to distinguish the transmitting and receiving sides of a data flow during a bidirectional auxiliary signal transmission process. The Source refers to the entity that generates and transmits data, and, for example, a host device (300) can be set as the Source. Conversely, the Sink is defined as the entity that receives and processes data transmitted from the Source and, if necessary, transmits response data, and, for example, a client device (400) can be set as the Sink.

[0052] The signal strength measuring unit (111, 112, 211, 212) measures the strength of a wired input signal or a wirelessly transmitted signal.

[0053] In one embodiment, when an input signal transmitted from a source occurs, the signal strength measuring unit (111) detects the strength of the signal in real time via TSSI (111) and transmits the measured value to the operation state determining unit ( / EN_RX, 122). In response, the sink side checks the strength of the signal received wirelessly via RSSI (211) and provides the measured value to the operation state determining unit ( / EN_TX, 222).

[0054] Likewise, the sink side detects the response data to be wirelessly transmitted in real time via TSSI (212) and transmits the measurement value to the operation state determination unit ( / EN_RX, 221). The source side detects the response data to be wirelessly transmitted in real time via RSSI (112), and the measurement value is provided to the operation state determination unit ( / EN_TX, 121).

[0055] Each operation state determination unit (121, 122, 221, 222) determines the current operation state of the wireless transceiver device (100, 200) as a transmission state (TX mode) or a reception state (RX mode) based on the measurement value transmitted from the correspondingly connected signal strength measurement unit (111, 112, 211, 212).

[0056] In one embodiment, when a transmission state is determined, the transmitter (130, 230) remains on to wirelessly transmit data corresponding to the input signal. At the same time, the receiver (140, 240) is controlled to be off to prevent unnecessary data reception or loop phenomena.

[0057] Conversely, when it is determined that the receiving state is active, the receiver (140, 240) remains in the ON state to receive and process the wirelessly received signal, and the transmitter (130, 230) is controlled to the OFF state.

[0058] A wireless transceiver device (100, 200) according to one embodiment of the present invention having such a structure is configured such that a transmitter (130, 230) and a receiver (140, 240) share a single data path, and in this case, the transmission and reception functions are integrated and implemented into a single chip. Since the transmission and reception of input signals are performed through a single line, the circuit area can be minimized and the power consumption of the wireless transceiver device (100, 200) can be reduced. In addition, by transmitting the input signal in a raw analog form (raw data) without packetizing it, the problem of reduced data throughput that may occur in existing digital modem-based communication can be resolved.

[0059] In particular, a wireless transceiver device (100, 200) according to one embodiment of the present invention is configured to efficiently implement bidirectional communication based on TDD, and control is possible through clear time division between transceiver modes. Through this, even if a single data line is used, a loop phenomenon does not occur, and the problem of data transmitted from the source returning to the source's receiver can be prevented.

[0060] FIG. 7 is a diagram illustrating a time table for bidirectional auxiliary signal transmission in one embodiment of the present invention. With reference to FIG. 7, the step-by-step operation of the transmission and reception process will be explained in detail by distinguishing between the request section and the response section.

[0061] First, during the request period (t=t1), the source-side wireless transceiver (100) transmits data. In the initial state, both the transmitter (130) and the receiver (140) of the source-side wireless transceiver (100) remain in the ON state. In this state, when an input signal output from the source occurs, the signal strength measuring unit (111, 112) measures the strength of the corresponding signal in real time through the TSSI (111). When a signal is detected, the TSSI (111) is activated, and the operation state detection unit ( / EN_RX, 122) prevents unnecessary reception by controlling the receiver (140) from the ON state to the OFF state upon receiving the TSSI value. On the other hand, since the RSSI (112) of the signal strength measuring unit (111, 112) is in a deactivated state, the transmitter (130) remains in the ON state, which is the initial state.

[0062] Likewise, in the initial state, both the transmitter (230) and the receiver (240) of the sink-side wireless transceiver (200) remain in the ON state. Subsequently, during the wireless transmission process, data transmitted from the source-side transmitter (130) reaches the sink-side wireless transceiver (200). On the sink side, the signal strength measuring unit (211, 212) measures the strength of the received wireless signal through the RSSI (211), and upon signal detection, the RSSI (211) is activated, and the operation state determining unit ( / EN_TX, 222) can determine the operation state of the transmitter (230) based on this. If the determination result indicates a reception state, the transmitter (230) is controlled from the ON state to the OFF state to prevent data retransmission or the occurrence of loop phenomena. On the other hand, since the TSSI (212) of the signal strength measuring unit (211, 212) is in a deactivated state, the receiver (240) maintains the initial ON state and transmits data to the sink.

[0063] Subsequently, during the time between t=t1 and t2, the sink processes the received data and prepares a response. During this process, the source side waits in a ready-to-receive state and prepares for the response period (t=t2). In the response period, the sink-side wireless transceiver (200) transmits response data and the source-side wireless transceiver (100) receives it.

[0064] Next, in the response section, response data is first output from the sink. At this time, in the initial state, both the transmitter (230) and the receiver (240) of the sink-side wireless transceiver (200) are kept in the ON state. The signal strength measuring unit (211, 212) measures the strength of the input signal as TSSI (212), and when a signal is detected, TSSI (212) is activated, and the operation state detection unit ( / EN_RX, 221) controls the receiver (240) from the ON state to the OFF state upon receiving the TSSI value. On the other hand, since the RSSI (212) of the signal strength measuring unit (211, 212) is in a deactivated state, the transmitter (230) remains in the ON state, which is the initial state.

[0065] Subsequently, the source-side wireless transceiver (100) receives the transmitted response data. At this time, in the initial state, both the transmitter (130) and the receiver (140) of the source-side wireless transceiver (100) remain in the ON state. When the transmitted response data reaches the source-side wireless transceiver (100), the source-side signal strength measuring unit (111, 112) measures the wireless signal strength through the RSSI (112). When the operation state determining unit ( / EN_TX, 121) determines the reception state, it controls the transmitter (130) from the ON state to the OFF state. On the other hand, since the TSSI (111) of the signal strength measuring unit (111, 112) is in a deactivated state, the receiver (140) maintains the ON state, which is the initial state, to receive the data and transmit it to the host (300).

[0066] In this way, one embodiment of the present invention clearly divides the time between the request and response sections to control the transmission and reception modes, thereby preventing data loop phenomena even in an environment where a single data line is shared and enabling stable bidirectional auxiliary signal transmission.

[0067] In addition, since communication is based on analog raw data without a packetization process, it offers higher data processing efficiency, lower circuit complexity, and low-power operation compared to digital modem-based methods. As such, one embodiment of the present invention can implement efficient and stable bidirectional auxiliary signal transmission in existing wired and wireless TDD communication environments.

[0068] Hereinafter, a bidirectional auxiliary signal transmission method performed by a wireless transceiver device (100, 200) according to an embodiment of the present invention will be described with reference to FIG. 8.

[0069] FIG. 8 is a flowchart of a bidirectional auxiliary signal transmission method according to one embodiment of the present invention.

[0070] First, the wireless transceiver (100, 200) maintains an initial state (S110). In the initial state, the signal strength measuring unit (111, 112, 211, 212) is all maintained in an inactive state with '0', and the operation state determining unit (121, 122, 221, 222) is all maintained with '1' so that the transmitter (130, 230) and receiver (140, 240) are both maintained in an ON state.

[0071] Next, depending on the transmission or reception status of the data (S120), the wireless transceiver (100, 200) performs an operation corresponding to the transmission or reception status.

[0072] Specifically, in the case of a transmission state, the wireless transceiver (100, 200) activates the TSSI (111, 212) of the signal strength measuring unit (111, 112, 211, 212) to '1' and maintains the RSSI (112, 211) in the '0' state. In accordance with this operation, ' / EN_RX (122, 221)' among the operation state determining unit (121, 122, 221, 222) is switched to '0' to control the receiver (140, 240) from the ON state to the OFF state. On the other hand, since ' / EN_TX (121, 222)' remains in the '1' state, the transmitter (130, 230) can transmit data while maintaining the previous ON state (S130, S140).

[0073] In contrast, in the case of a receiving state, the wireless transceiver (100, 200) maintains the TSSI (111, 212) of the signal strength measuring unit (111, 112, 211, 212) in the '0' state and activates the RSSI (112, 211) to '1'. In accordance with this operation, ' / EN_TX (121, 222)' among the operation state determining unit (121, 122, 221, 222) is switched to '0' to control the transmitter (130, 230) from the ON state to the OFF state. On the other hand, since ' / EN_RX (122, 221)' remains in the '1' state, the receiver (140, 240) can receive data by maintaining the previous ON state (S150, S160). The received data is delivered to a host or client depending on the transmission target.

[0074] Next, when there is no data transmission or reception state, the activated signal strength measuring unit (111, 112, 211, 212) is switched back to an inactive state, and accordingly, the operation state determining unit (121, 122, 221, 222) is also maintained at '1' so that the transmitter (130, 230) and receiver (140, 240) are both maintained in the initial ON state (S110).

[0075] In addition, one embodiment of the present invention can automatically correct the threshold values ​​of TSSI and RSSI to improve the operational reliability of the wireless transceiver device (100, 200). That is, in a situation where the quality of the wireless link may change in real time depending on the usage environment, and the signal strength distribution based on RSSI and TSSI continuously fluctuates due to various external factors such as changes in distance, attenuation due to obstacles, and surrounding interference, it may be difficult to determine the optimal transceiver mode using only fixed threshold values.

[0076] To resolve these issues, one embodiment of the present invention calculates statistical values ​​based on signal strength measurements accumulated over a certain period of time and can dynamically adjust threshold values ​​based on the calculated statistical values. For example, RSSIs over a specific period can be aggregated to calculate statistical values ​​such as the average and median, and threshold values ​​can be adjusted to distinguish transmission / reception modes in a manner suitable for the current environment based on the statistical values.

[0077] Automatic adjustment of the threshold of such wireless transceiver devices (100, 200) may be implemented in the wireless transceiver devices (100, 200), but preferably in the host (300) or client (400). That is, since it is preferable for the wireless transceiver devices (100, 200) to be implemented to include only the minimum functions for wireless transmission and reception, the host (300) or client (400) can utilize higher processing performance to analyze signal strength history data over a certain period, and additionally, perform learning of noise patterns or calculation of thresholds based on prediction of environmental change trends, and transmit the calculated dynamic threshold to the wireless transceiver devices (100, 200) to be reflected in real-time operation.

[0078] In addition, one embodiment of the present invention can perform loop detection and blocking operations in conjunction with controlling the transceivers (130, 140, 230, 240) of the wireless transceiver device (100, 200) to resolve loop problems occurring in a single line structure. Specifically, for a certain period after wireless transmission, the host (300) or client (400) can detect whether its transmission signal is being received in reverse. For example, the possibility of a self-loop can be determined by comparing the pattern (e.g., waveform, etc.) of the signal entering the receiver (140, 240) immediately after transmission. Subsequently, when a loop is detected, the receiver (140, 240) can be immediately turned off or the transmission operation of the transmitter (130, 230) can be stopped to block the loop path. Alternatively, if the signal strength received appears in a specific pattern abnormally quickly immediately after transmission, that is, faster than the time taken to receive response data after transmission, or if a repetitive self-inflow pattern is detected within a specific time interval, the host (300) or client (400) may determine this as a loop occurrence condition and preemptively block the receiver (140, 240).

[0079] In addition, one embodiment of the present invention allows a host (300) or a client (400) to control the transceivers (130, 140, 230, 240) of a wireless transceiver device (100, 200) by analyzing the pattern of auxiliary signals exchanged over a certain period of time to predict the future transmission direction in advance. This can be primarily applied to an embodiment that performs mode switching operations based on real-time signal strength (TSSI / RSSI). Specifically, the host (300) or the client (400) can learn a prediction model by collecting data flows exchanged over a plurality of past unit periods, namely the request period and response period, data occurrence frequency, effective signal transmission rate, and directionality pattern. After learning and applying the prediction model, the prediction model can predict in advance whether the next section will be a transmission section or a reception section. And if the predicted direction satisfies a certain reliability standard, the wireless transceiver (100, 200) can control the transmitter (130, 230) or receiver (140, 240) to an OFF state even before actual signal detection (TSSI / RSSI). That is, if the transmission direction is predicted, the receiver (140, 240) is blocked first to prevent the inflow of incorrect magnetic signals, and conversely, if the reception direction is predicted, the transmitter (130, 230) is deactivated early to prevent unnecessary wireless output.

[0080] These embodiments of the present invention enable preemptive mode switching based on prediction rather than real-time measurement, thereby further preventing the possibility of unnecessary loops. In addition, by collecting and comparing prediction results and real-time measurement results and reflecting them in the learning data, there is an advantage of preventing loops through intelligent transmission direction setting based on prediction, going beyond simple transceiver (130, 140, 230, 240) control.

[0081] Meanwhile, in the above description, steps S110 to S70 may be further divided into additional steps or combined into fewer steps according to an embodiment of the present invention. Also, some steps may be omitted as necessary, and the order between steps may be changed. Furthermore, even if other omitted details are included, the contents of FIGS. 5 to 7 and the bidirectional auxiliary signal transmission method of FIG. 8 may be mutually applied.

[0082] 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 spirit 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.

[0083] 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 equivalent concepts thereof should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0084] 100, 200: Wireless transceiver 111, 112, 211, 212: Signal strength measuring unit 121, 122, 221, 222: Operation signal determining unit 130, 230: Transmitter 140, 240: Receiver 300: Host 400: Client

Claims

Claim 1 A wireless transceiver that wirelessly transmits a bidirectional auxiliary signal between a host and a client using a time division duplex (TDD) method, comprising: a signal strength measuring unit connected to the host or client via a single wired data line to measure the strength of an input signal input via wire or a signal wirelessly transmitted from another wireless transceiver; an operation state determining unit that determines the current operation state as a transmission state or a reception state to prevent loop errors based on the measured signal strength; a transmitter that wirelessly transmits data corresponding to the input signal in an analog form without packetizing it while in the ON state when the operation state is determined to be a transmission state, and switches to an OFF state when the operation state is determined to be a reception state; and a receiver that switches to an OFF state when the operation state is determined to be a transmission state, and receives the wirelessly transmitted signal while in the ON state when the operation state is determined to be a reception state, and directly transmits the wireless signal to the host or client without packet decoding, wherein the host or client detects whether its transmission signal is being received in reverse, and upon detecting a loop, immediately turns off the receiver or temporarily suspends the transmission operation of the transmitter to block the loop path. Claim 2 delete Claim 3 A wireless transceiver according to claim 1, wherein the transmitter and receiver are integrated on a single chip and share a single data line to perform the transmission and reception of an input signal. Claim 4 delete Claim 5 A wireless transceiver according to claim 1, wherein the signal strength measuring unit measures the strength of the input signal through TSSI as an input signal is transmitted from the source side to the sink side during the request period, the operation state determining unit determines whether a transmission state exists based on the measured signal strength, and when a transmission state is determined, the transmitter maintains an ON state to wirelessly transmit data corresponding to the input signal under the control of the operation state determining unit, and the receiver is controlled to an OFF state during the request period so as not to perform a receiving function. Claim 6 A wireless transceiver according to claim 5, wherein the signal strength measuring unit measures the strength of the wireless signal via RSSI at the sink side receiving the wireless signal transmitted during the request interval, the operation state determining unit determines whether a reception state exists based on the measured signal strength, and when a reception state is determined, the receiver maintains an ON state to receive data corresponding to the wireless signal according to the control of the operation state determining unit, and the transmitter is controlled to an OFF state during the request interval. Claim 7 A wireless transceiver according to claim 1, wherein the signal strength measuring unit measures the strength of the input signal through TSSI as the input signal is transmitted from the sink side to the source side in the response section after the request section, the operation state determining unit determines whether a transmission state exists based on the measured signal strength, and when a transmission state is determined, the transmitter maintains an ON state to wirelessly transmit data corresponding to the input signal according to the control of the operation state determining unit, and the receiver is controlled to an OFF state during the response section so as not to perform a receiving function. Claim 8 A wireless transceiver according to claim 7, wherein the signal strength measuring unit measures the strength of the wireless signal via RSSI at the source side receiving the wireless signal transmitted during the response interval, the operation state determining unit determines whether a reception state exists based on the measured signal strength, and when a reception state is determined, the receiver maintains an ON state to receive data corresponding to the wireless signal according to the control of the operation state determining unit, and the transmitter is controlled to an OFF state during the response interval. Claim 9 A method for wirelessly transmitting a bidirectional auxiliary signal between a host and a client using a time division duplex (TDD) method, comprising: a step of measuring the strength of an input signal input via a wired connection to a host or client connected by a single wired data line or a signal wirelessly transmitted from another wireless transceiver; a step of determining the current operation as a transmission state or a reception state to prevent loop errors based on the measured signal strength; a step of, when the transmission state is determined, controlling the transmitter to an ON state and the receiver to an OFF state to wirelessly transmit the input data in an analog form without packetizing; a step of, when the reception state is determined, controlling the transmitter to an OFF state and the receiver to an ON state to receive the wirelessly input data and transmit it directly to the host or client without packet decoding; and a step of delivering the transmitted or received data to the host or client through a single data line, wherein the host or client detects whether its transmission signal is being received in reverse, and upon detecting a loop, immediately turns off the receiver or temporarily suspends the transmission operation of the transmitter to block the loop path.

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