WO2012037752A1

WO2012037752A1 - Fast access close range wireless communication module for controlling communication range

Info

Publication number: WO2012037752A1
Application number: PCT/CN2010/079461
Authority: WO
Inventors: 余运波; 朱杉
Original assignee: 国民技术股份有限公司
Priority date: 2010-09-21
Filing date: 2010-12-06
Publication date: 2012-03-29
Also published as: CN102412870A

Abstract

The present invention relates to the field of communications, especially discloses a host communication module and slave communication module for efficient fast access close range wireless communication with a controllable communication range, wherein the host communication module is used for sending a first range reference signal including information of the host communication module and communication range information; and the slave communication module judges, according to the received first range reference signal, whether the communication range satisfies a preset scope, and if yes, the slave communication module establishes a fast wireless communication connection according to a preset protocol and performs data exchange. The first range reference signal can take the form of a low frequency magnetic signal or an ultrasonic signal in order to satisfy the requirement of close range access. The host communication module and slave communication module of the present invention provide a basic hardware carrier for realizing real-time, fast and efficient wireless data exchange within a specific range scope.

Description

Fast access short-range wireless communication module for controlling communication range

The present invention relates to the field of communications, and in particular, to a main communication module and a slave communication module for quickly accessing high-efficiency short-range wireless communication with controllable communication range. Background technique

High-speed wireless transmission has been widely used for data exchange on current computers or mobile devices. Wi_Fi (IEEE802. l la/b/g/n standard), Bluetooth, Zigbee (IEEE 802. 15. 4 standard) are commonly used. , UWB (Ultra tra Wideband, ultra-wideband wireless transmission) and other technologies. These high-speed wireless communication enables information exchange and function sharing between computers or mobile devices, and users can implement streaming file transfer, address book exchange, and shared access to the Internet operation in these mobile devices. These technologies are aimed at data exchange applications over long periods of time, multiple users, and over long distances (more than 10 meters); when using this technology, users need to perform more complicated configurations, such as the need for cumbersome settings for initial use, It takes a while to wait for the host to find and connect. In addition, due to factors such as the simultaneous operation of multiple users and the poor quality of radio frequency signals, these technologies generally define complex link management protocols in the communication process. These protocol overheads result in low radio channel utilization.

Currently, with the diversification and widespread use of mobile electronic devices, there is an increasing demand for applications that share data instantly between two devices. Usually the distance between two devices sharing data is very close

(such as within 1 meter), but the data exchange is required to be very fast, timely and efficient. For example, the device automatically enters and sets the data range from the device to the main device setting range, and the connection is automatically disconnected when the setting range is removed. However, the existing communication technologies cannot meet the requirements of users in this close range to exchange data in an instant, fast and efficient manner.

In the prior art, wireless communication systems capable of performing wireless communication systems within a limited range mainly include RFID radio frequency tag systems. RFID radio frequency tags are classified by frequency, 13.56MHz, 800-90幌Hz, 2. 4GHz, etc., of which 13.56M tags read and write distance is less than 10cm, while the other two can reach several meters. These RFID systems have two problems: the communication rate is too low and the communication distance cannot be flexibly controlled; and the label side adopts a passive method, which requires high power of the reader, and is not easily integrated into portable mobile electronics. In the device. Summary of the invention

The technical problem to be solved by the present invention is to provide a main communication module and a slave communication module for quickly accessing high-efficiency short-range wireless communication with controllable communication range, and implementing various high-speed wireless communication functions without relying on complicated The access process, cumbersome settings and inefficient data exchange protocol overhead enable fast access and efficient communication over a specific distance.

The technical solution of the present invention to solve the above technical problems is as follows:

A main communication module includes a reference unit, a first wireless communication unit, and a first control unit that controls operation of the reference unit and the first wireless communication unit, the reference unit is configured to wirelessly transmit a first distance reference signal, The first wireless communication unit is configured to quickly establish a wireless communication connection and perform data exchange according to a preset protocol.

The beneficial effect of the foregoing main communication module is: by transmitting the first distance reference signal, so that the corresponding receiving module or device can determine whether it is within a preset communication distance range according to the first distance reference signal, if the preset communication distance is Within the scope, instant, fast, and efficient wireless communication and data exchange within a preset distance range with the main communication module can be achieved. The main communication module provides a basic hardware carrier for fast access to high-efficiency short-range wireless communication with controllable communication range.

Further, the rate at which the first wireless communication unit establishes a wireless communication connection and performs data exchange is higher than the rate at which the reference unit transmits the first distance reference signal.

The advantage of using the above further solution is that it is possible to establish a high-speed data transmission channel in the form of distance determination using a low-speed transmission channel.

Further, the first distance reference signal includes the main communication module information and communication distance information.

An advantage of the above further aspect is that the first distance reference signal containing the primary communication module information and the communication distance information facilitates the determination of the primary communication module by the means for receiving the first distance reference signal and the distance determination.

Further, the reference unit includes a first microcontroller, a first encoding circuit, and a serial a first driving circuit and a first magnetic field emission line; the first microcontroller is configured to control the first encoding circuit and the first driving circuit; the first encoding circuit is configured to perform wireless data frame of the main communication module information Bit coding, and transmitting to the first driving circuit; the first driving circuit is configured to drive the first magnetic field emission line ;; the first magnetic field emission line is used to generate a first distance reference containing information of the main communication module The signal is transmitted as a magnetic signal.

An advantage of the above further solution is that a manner of transmitting the first distance reference signal using the magnetic signal form as a carrier is provided.

Further, the reference unit further includes a first modulation circuit disposed between the first encoding circuit and the first driving circuit; the first modulation circuit is configured to modulate the information of the main communication module after encoding the first encoding circuit, And transmitted to the first driving circuit.

A further advantage of the above further solution is that the primary communication module information can be modulated as needed.

Further, the reference unit further includes a second magnetic induction circuit, a second amplification circuit, and a second threshold determination and demodulation circuit, the second magnetic induction circuit, the second amplification circuit, the second threshold determination and demodulation circuit, and the first The second magnetic induction circuit is configured to inductively receive a second distance reference signal containing signal emission source information in the form of a magnetic signal and convert it into an electrical signal form, and transmit the same to the second amplifying circuit; The second amplifying circuit is configured to amplify and transmit the second distance reference signal to the second threshold determining and demodulating circuit; and the second threshold determining and demodulating circuit is configured to determine whether the second distance reference signal reaches a preset gate a limit value, if the preset threshold value is reached, transmitting signal source information in the second distance reference signal to the first microcontroller; the first microcontroller is configured to control the second magnetic induction circuit and the second amplification circuit And a second threshold determination and demodulation circuit, and transmitting the received signal transmission source information to the first control unit.

The advantage of using the above further solution is that a channel for verifying the communication distance between the main communication module and other signal transmission sources is provided, so that the main communication module has a function of detecting a communication distance with other signal transmission sources.

Further, the first distance reference signal is a low frequency magnetic signal.

The advantage of using the above further method is that with the magnetic signal, the magnetic induction physical quantity can be used to calculate the communication distance. The magnetic induction intensity is attenuated by R- ³ with the communication distance R, and the attenuation of the low-frequency magnetic signal when penetrating different objects is small, the anti-interference ability is strong, and the robustness of the magnetic communication is good, so that the main The security of the first distance reference signal transmitted between the communication module and the communication module is high.

Further, the frequency of the low frequency magnetic signal is 500 Ηζ, 1 ΚΗζ, 1.5 kHz, 2 kHz, 2. 5 kHz, 3 kHz, 4 kHz, 5 kHz, 10 kHz, 20 kHz, 30 kHz, or 1 Hz.

Further, the second distance reference signal is a low frequency magnetic signal.

Further, the reference unit includes at least three ultrasonic transmitters and at least one modulation and start control device, wherein the modulation and start control devices are respectively connected to the ultrasonic transmitter; the modulation and start control device is configured to use the main communication module information Modulating into a first distance reference signal and simultaneously activating the at least three ultrasonic transmitters; the at least three ultrasonic transmitters are configured to respectively transmit first distance reference signals in the form of ultrasonic waves of different frequencies.

A further advantage of the above described further solution is to provide a means of transmitting a first distance reference signal using the ultrasonic signal form as a carrier.

Further, the reference unit includes three ultrasonic transmitters and a modulation and start control device.

Further, the first distance reference signal is an ultrasonic signal.

The advantage of using the above further solution is that the ultrasonic signal can be used to achieve precise communication distance control, the communication control range can reach several meters or more, and the communication can be accurately controlled within a range of 1 meter, 0.5 meters or even 10 cm. In addition, the ultrasonic solution can adapt to the real-time, high-speed exchange of data between electronic devices on the desktop, and can also adapt to real-time, high-speed data exchange between vehicles, between vehicles and gates, and ultrasonic and first The wireless communication unit communication signals have less mutual interference.

Further, the first wireless communication unit is a Wi-F i module, a Bluetooth module or a UWB module. The beneficial effect of using the above further solution is that data exchange and communication between the main communication module and other communication devices can take many forms to meet various forms of communication requirements.

Further, the wireless communication band of the first wireless communication unit is 433 MHz, 90 Hz, 2. 4 GHz, 5. 8 GHz or 60 GHz.

The benefit of using the above further solution is to achieve high speed communication and data exchange.

Further, the reference unit transmits a first distance reference signal and the first wireless communication unit Quickly establish a wireless communication connection according to a preset protocol and perform data exchange at different times.

The advantage of using the above further solution is that the transmission of the first distance reference signal is performed separately from establishing a communication connection and performing data exchange, that is, after the communication connection is established and data exchange is performed, the transmission of the first distance reference signal is stopped, so that the first The transmission of the reference signal does not have to be performed at any time, thereby preventing signals from interfering with each other, improving transmission efficiency and measurement accuracy, and the device structure is easy to operate, and system resources can be saved.

Further, the reference unit sends the first distance reference signal to establish a wireless communication connection and exchange data according to the preset protocol before the first wireless communication unit.

The above-mentioned further solution has the beneficial effects of preventing signals from interfering with each other, improving transmission efficiency and measurement accuracy, and the device structure is easy to operate, and system resources can be saved.

Further, the reference unit intermittently transmits a first distance reference signal, and the first wireless communication unit performs fast data exchange between the transmitting the first distance reference signals.

The above-mentioned further solution has the beneficial effects of preventing signals from interfering with each other, improving transmission efficiency and measurement accuracy, and the device structure is easy to operate, and system resources can be saved. A slave communication module, comprising: a measurement unit, a second wireless communication unit, and a second control unit that controls the measurement unit and the second wireless communication unit; the measurement unit is configured to receive the first distance reference signal and according to the first The distance reference signal determines whether the communication distance between the communication module and the signal transmission source that issues the first distance reference signal satisfies a preset range, and if so, the second wireless communication unit quickly establishes a wireless communication connection according to a preset protocol and performs Data exchange.

The beneficial effect of the above-mentioned slave communication module is: determining whether the slave communication module and the signal transmission source are within a preset communication distance range according to the first distance reference signal by receiving the first distance reference signal, if the preset communication distance is Within the scope, the instant, fast and efficient wireless communication and data exchange of the slave communication module within a preset distance range can be realized. The slave communication module provides a basic hardware carrier for fast access to efficient close-range wireless communication with controllable communication range.

Further, the second wireless communication unit establishes a wireless communication connection and performs data exchange at a higher rate than the measurement unit receives the first distance reference signal.

The advantage of using the above further solution is that it is possible to establish a high-speed data transmission channel in the form of distance judgment using a low-speed transmission channel. Further, the first distance reference signal includes signal transmission source information and communication distance information. The advantage of using the above further solution is that it facilitates the determination and distance determination of the signal transmission source from the communication module.

Further, the determining unit includes a first magnetic induction circuit, a first amplifying circuit, a first threshold determining and demodulating circuit, and a second microcontroller connected in series; the first magnetic sensing circuit is configured to inductively receive a magnetic signal The first distance reference signal is converted into an electrical signal form and transmitted to the first amplifying circuit; the first amplifying circuit is configured to amplify and transmit the first distance reference signal to the first threshold determining and demodulating circuit; The first threshold determining and demodulating circuit is configured to determine whether the first distance reference signal reaches a preset threshold, and if the preset threshold is reached, the signal source information included in the first distance reference signal is included. Transmitting to the second microcontroller; the second microcontroller is configured to control the first magnetic induction circuit, the first amplification circuit, and the first threshold determination and demodulation circuit, and transmit the received signal transmission source information to the first Two control units.

An advantage of the above further solution is that a channel is provided for verifying the communication distance between the communication module and the signal transmission source.

Further, the determining unit further includes a second encoding circuit, a second driving circuit, and a second magnetic field emission line; the second microcontroller, the second encoding circuit, the second driving circuit, and the second magnetic field emission line are smooth a second serial controller; the second microcontroller is configured to control the second encoding circuit and the second driving circuit; the second encoding circuit is configured to perform bit-by-bit encoding on the wireless data frame of the communication module information, and transmit the data to the second driving The second driving circuit is configured to drive the second magnetic field emission line ;; the second magnetic field emission line is used to generate a second distance reference signal containing information from the communication module and transmit in the form of a magnetic signal.

The advantage of using the above further solution is that the communication module further provides a second distance reference signal transmission using the magnetic signal form as a carrier, so that the corresponding receiving module or device receives and judges the slave communication module. Communication distance between.

Further, the determining unit further includes a second modulation circuit disposed between the second encoding circuit and the second driving circuit; the second modulation circuit is configured to modulate the information of the slave communication module after encoding the second encoding circuit, And transmitted to the second drive circuit.

A further advantage of the above further solution is that the slave communication module information can be modulated as needed. Further, the first distance reference signal is a low frequency magnetic signal.

Further, the measuring unit comprises at least three ultrasonic receivers and at least one demodulation and time comparison device, wherein the ultrasonic receivers are respectively connected to the demodulation and time comparison devices; the at least three ultrasonic receivers are configured to receive the signals simultaneously a first distance reference signal of different ultrasonic frequencies, and transmitting the first distance reference signal to a demodulation and time comparison device; the demodulation and time comparison means for respectively demodulating the first distance reference signal of different ultrasonic frequencies And determining, according to a time difference of the first distance reference signal of the different ultrasonic frequencies reaching the measuring unit, whether the communication distance between the slave communication module and the signal transmitting source meets a preset range, and if satisfied, the first distance reference signal is The contained signal transmission source information is transmitted to the second control unit.

The advantageous effect of the above further aspect is to provide a scheme for judging the communication distance between the signal transmitting source and the slave communication module by the ultrasonic signal, thereby realizing the judgment of the communication distance.

Further, the first distance reference signal is an ultrasonic signal.

The advantage of using the above further solution is that the ultrasonic signal can be used to achieve precise communication distance control, the communication control range can reach several meters or more, and the communication can be accurately controlled within a range of 1 meter, 0.5 meters or even 10 cm. In addition, the ultrasonic solution can adapt to the real-time, high-speed exchange of data between electronic devices on the desktop, and can also adapt to real-time, high-speed data exchange between vehicles, between vehicles and gates, and ultrasonic and second The wireless communication unit communication signals have less mutual interference.

Further, the second wireless communication unit is a Wi-F i module, a Bluetooth module or a UWB module. The beneficial effect of using the above further solution is that data exchange and communication between the communication module and other communication devices can take many forms to meet various forms of communication requirements.

Further, the wireless communication band of the second wireless communication unit is 433 MHz, 90 Hz, 2. 4 GHz, 5. 8 GHz or 60 GHz.

The benefit of using the above further solution is to achieve high speed communication and data exchange. Further, the determining unit receives the first distance reference signal and the second wireless communication unit quickly establishes a wireless communication connection according to a preset protocol and performs data exchange at different times.

The advantage of using the above further solution is that the reception of the first distance reference signal is performed separately from establishing a communication connection and performing data exchange, that is, after establishing the communication connection and performing data exchange, stopping the reception of the first distance reference signal, so that the first The receiving and judging of the distance reference signal does not have to be performed at any time, thereby preventing signals from interfering with each other, improving transmission efficiency and measurement accuracy, and the device structure is easy to operate, and system resources can be saved.

Further, the determining unit receives the first distance reference signal, and the second wireless communication unit quickly establishes a wireless communication connection according to a preset protocol and performs data exchange.

Further, the measuring unit intermittently receives the first distance reference signal, and the second wireless communication unit performs fast data exchange between the receiving the first distance reference signal.

The above-mentioned further solution has the beneficial effects of preventing signals from interfering with each other, improving transmission efficiency and measurement accuracy, and the device structure is easy to operate, and system resources can be saved. DRAWINGS

1 is a schematic structural diagram of a main communication module and a slave communication module according to the present invention;

2 is a diagram showing a one-way communication between a reference unit and a measuring unit in the embodiment of the present invention;

3 is a two-way communication structure diagram between a reference unit and an assay unit of the embodiment of the present invention using a magnetic signal;

Fig. 4 is a diagram showing the communication structure between a reference unit and a measuring unit of an embodiment in which an ultrasonic signal is applied in the present invention.

In the drawings, the list of parts represented by each label is as follows:

1. The main communication module, 2. the slave communication module, 1 01, the first control unit, 1 02, the reference unit, 103, the first wireless communication unit, 201, the second control unit, 202, the measurement unit, 203, 2 wireless communication unit, 1 021, first microcontroller, 1 022, forward transmission unit, 2021, second microcontroller, 2202, forward reception judgment unit, 1 0221, first coding circuit, 1 0222, One drive Dynamic circuit, 10223, first magnetic field emission line 圏, 10224, first modulation circuit, 20221, first magnetic induction circuit, 20222, first amplification circuit, 20223, first threshold determination and demodulation circuit, 2023, reverse transmission unit , 1023, reverse reception judging unit, 20231, second encoding circuit, 20232, second driving circuit, 20233, second magnetic field emission line 圏, 20234, second modulation circuit, 10231, second magnetic induction circuit, 10232, second Amplifying circuit, 10233, second threshold determining and demodulating circuit, 1023, modulation and starting control device, 1024, first ultrasonic transmitter, 1025, second ultrasonic transmitter, 1026, third ultrasonic transmitter, 2023, demodulation And time comparison device, 2024, first ultrasonic receiver, 2025, second ultrasonic receiver, 2026, third ultrasonic receiver

The principles and features of the present invention are described in the following description with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a main communication module and a slave communication module of a fast access high-efficiency short-range wireless communication with controllable communication range in the present invention. The main communication module 1 is configured to send a first distance reference signal containing the main communication module information and the communication distance information; and the communication module 2 determines between the main communication module 1 and the slave communication module 2 according to the received first distance reference signal. Whether the distance satisfies the preset range, if satisfied, the main communication module 1 and the slave communication module 2 quickly establish a wireless communication connection and exchange data according to a preset protocol. The rate at which the main communication module 1 and the slave communication module 2 quickly establish a wireless communication connection according to a preset protocol and exchange data is higher than the rate at which the primary communication module 1 transmits the first distance reference signal.

As shown in FIG. 1, the main communication module 1 includes a reference unit 102, a first wireless communication unit 103, and a first control unit 101 that controls the reference unit 102 and the first wireless communication unit 103. The slave communication module 2 includes a measurement unit 202, The second wireless communication unit 203 and the second control unit 201 that controls the measurement unit 202 and the second wireless communication unit 203 operate. There is a forward communication channel from the reference unit 102 to the measurement unit 202 between the reference unit 102 and the measurement unit 202, and a reverse communication channel from the measurement unit 202 to the reference unit 102 may be present as needed; the first wireless communication There is a two-way high speed wireless communication channel between unit 103 and second wireless communication unit 203. The reference unit 102 is configured to send the first distance reference signal to the measuring unit 202 through the forward communication channel; the determining unit 202 can also be used to pass the reverse communication channel to the reference unit 102 as needed. Send a second distance reference signal. The determining unit 202 is configured to receive the first distance reference signal sent by the reference unit 102, determine whether the distance between the main communication module 1 and the slave communication module 2 satisfies a preset range, and if yes, include the first distance reference signal The main communication module information is transmitted to the second control unit 201. After receiving the main communication module information, the second control unit 201 quickly establishes the main communication module 1 according to the preset protocol by the first wireless communication unit 103 and the second wireless communication unit 203. And wireless communication connection from the communication module 2 and data exchange. Of course, the determining unit 202 and the reference unit 102 may also have the functions of the above-described reference unit 102 and the measuring unit 202, respectively, and the measuring unit 202 may transmit the second distance reference signal to the reference unit 102 through the reverse communication channel; The first control unit 101 and the second control unit 201 may have control functions of each other to implement distance measurement between the main communication module 1 and the slave communication module 102. The first wireless communication unit 103 and the second wireless communication unit 203 perform wireless communication under the control of the first control unit 101 and the second control unit 201, respectively.

In the present invention, the first wireless communication unit 103 and the second wireless communication unit 203 can adopt the Wi-F i module, the Bluetooth module or the UWB module of the 2.4 GHz band to implement high-speed wireless communication and data exchange between them. Other frequencies can also be used, such as 433MHz, 90幌Hz, 5. 8GHz and 60GHz.

The high-speed wireless communication unit access parameter between the first wireless communication unit 103 and the second wireless communication unit 203 mainly includes an access channel, an SS ID (Service Set Identifier) of the main communication module 1, and a physical address of the main communication module 1. , key or certificate, etc. These parameters are mainly issued by the reference unit 102 in the main communication module 1, and are received by the measuring unit 202 in the communication module 2 within an agreed range (e.g., 1 meter). These parameters are parsed from the communication module 2, and related parameters are set to be connected to the main communication module 1. The communication between the reference unit 102 and the measurement unit 202 can be performed by a magnetic signal communication method, an ultrasonic signal communication method, or the like as needed. The communication between the reference unit 102 and the measurement unit 202 will be described below by taking the magnetic signal communication method and the ultrasonic signal communication method as an example.

Magnetic signal communication embodiment

As shown in FIG. 2, the reference unit 102 is a magnetic signal reference unit, the measurement unit 202 is a magnetic signal measurement unit, and the first distance reference signal transmitted from the reference unit 102 to the measurement unit 202 is in the form of a magnetic signal. The reference unit 102 includes a first microcontroller 1 021 connected in series, and a first coded The circuit 10221, the first driving circuit 10222 and the first magnetic field emission line 10223; wherein the first microcontroller 1021 is configured to control the first encoding circuit 10221 and the first driving circuit 10222; the first encoding circuit 10221, the first driving circuit 10222 And the first magnetic field emission line 圏 10223 constitutes a forward transmitting unit 1022 for transmitting a first distance reference signal in the form of a magnetic signal. The measuring unit 202 includes a first magnetic induction circuit 20221, a first amplification circuit 20222, a first threshold determination and demodulation circuit 20223, and a second microcontroller 2021 connected in series; wherein the second microcontroller 2021 is configured to control the first magnetic induction The circuit 20221, the first amplifying circuit 20222, the first threshold determining and demodulating circuit 20223, the first magnetic sensing circuit 20221, the first amplifying circuit 20222, and the first threshold determining and demodulating circuit 20223 constitute a forward receiving determining unit 2022. The forward reception determining unit 2022 is configured to receive the magnetic signal and determine whether the distance between the main communication module 1 and the slave communication module 2 satisfies a preset range, and if yes, transmit the information of the main communication module included in the first distance reference signal to The second microcontroller 2021 transmits the main communication module information to the second control unit 201.

Specifically, the first encoding circuit 10221 in the forward sending unit 1022 is configured to perform bit-by-bit encoding on the wireless data frame of the main communication module information, and transmit the data to the first driving circuit 10222. The first driving circuit 10222 is used to The magnetic field emission line 圏 10223 is driven to generate a low frequency alternating magnetic field; the first magnetic field emission line 10223 is for generating a first distance reference signal containing information of the main communication module and transmitting it to the slave communication module 2 as a magnetic signal.

The first magnetic induction circuit 20221 in the forward reception determining unit 2022 is configured to inductively receive the first distance reference signal in the form of a magnetic signal transmitted by the main communication module 1 and convert it into an electrical signal form; the first amplifying circuit 20222 is configured to The first distance reference signal in the form of a signal is amplified; the first threshold determining and demodulating circuit 20223 is configured to determine whether the first distance reference signal in the form of the electrical signal reaches a preset threshold (eg, a threshold voltage value), if the preset is reached The threshold voltage then transmits the primary communication module information in the first distance reference signal to the second microcontroller 2021.

The forward transmitting unit 1022 may further provide a first modulating circuit 10224 between the first encoding circuit 10221 and the first driving circuit 10222 for modulating the main communication module information encoded by the first encoding circuit 10221 and transmitting the information according to the need. The first drive circuit 10222 is provided.

If necessary, expansion may be performed on the basis of one-way communication between the reference unit 102 and the measurement unit 202 shown in FIG. 2 to realize two-way communication between the reference unit 102 and the measurement unit 202, and the structure thereof is as shown in FIG. . The measuring unit 202 further includes a second encoding circuit 20231 and a second driving circuit. The road 20232 and the second magnetic field emission line 圏20233; the second controller 2021, the second encoding circuit 20231, the second driving circuit 20232 and the second magnetic field emission line 23320233 are connected in series; the second controller 2021 is used for controlling The second encoding circuit 20231 and the second driving circuit 20232; the second encoding circuit 20231, the second driving circuit 20232, and the second magnetic field emission line 20233 constitute a magnetic field for transmitting information including communication information from the communication module and the communication module. The reverse transmission unit 2023 of the second distance reference signal in the form of a signal. Correspondingly, the reference unit 102 further includes a second magnetic induction circuit 10231, a second amplification circuit 10232, and a second threshold determination and demodulation circuit 10233; a second magnetic induction circuit 10231, a second amplification circuit 10232, a second threshold determination and demodulation circuit 10233 and the first microcontroller 1021 are sequentially connected in series; the first microcontroller 1021 is configured to control the second magnetic induction circuit 10231, the second amplification circuit 10232, and the second threshold determination and demodulation circuit 10233; the second magnetic induction circuit 10231, the first The second amplifying circuit 10232 and the second threshold determining and demodulating circuit 10233 constitute a reverse reception judging unit 1023. The reverse reception determining unit 1023 is configured to receive the second distance reference signal in the form of a magnetic signal and determine whether the distance between the communication module 2 and the main communication module 1 satisfies a preset range, and if so, the second distance reference signal is included The slave communication module information is transmitted to the first microcontroller 1021; the first microcontroller 1021 transmits the communication module information to the first control unit 101; after receiving the slave communication module information, the first control unit 101 passes the first wireless The communication unit 103 and the second wireless communication unit 203 quickly establish a wireless communication connection between the main communication module 1 and the slave communication module 2 and perform data exchange according to a preset protocol.

Specifically, as shown in FIG. 3, the second encoding circuit 20231 in the reverse transmitting unit 2023 is configured to perform bit-by-bit encoding on the wireless data frame of the main communication module information, and transmit the data to the second driving circuit 20232; the second driving circuit 20232 is configured to drive the second magnetic field emission line 23320233 to generate a second low frequency alternating magnetic field; the second magnetic field emission line 23320233 is configured to generate a second distance reference signal containing information from the communication module and send the signal as a magnetic signal Main communication module 1.

The second magnetic induction circuit 10231 in the reverse reception determining unit 1023 is configured to inductively receive and convert the second distance reference signal in the form of a magnetic signal transmitted from the communication module 2 into an electrical signal form; the second amplifying circuit 10232 is configured to The second distance reference signal in the form of a signal is amplified; the second threshold determination and demodulation circuit 10233 is configured to determine whether the second distance reference signal in the form of the electrical signal reaches a preset threshold, and if so, the second distance reference signal The slave communication module information is transmitted to the first microcontroller 1021. The reverse transmitting unit 2023 may further provide a second modulation circuit 20234 between the second encoding circuit 20231 and the second driving circuit 20232 for modulating the communication module information encoded by the second encoding circuit 20231, and transmitting The second drive circuit 20232 is provided.

In the magnetic signal communication embodiment, the magnetic induction circuit is composed of a PCB (Pin in ed C i rcui t Board), an enameled wire 圏, a Hall device or other circuit components capable of sensing a magnetic field change; And the demodulation circuit judges the magnetic detection voltage signal according to a preset distance threshold, does not reach the threshold and does not demodulate and does not allow communication, and demodulates the signal when the threshold is reached, and the demodulated signal is sent to the second microcontroller.

In the magnetic signal communication embodiment, the reference unit 102 and the measuring unit 202 can adopt a low frequency magnetic induction communication circuit, and the corresponding frequency points can be selected from 500 Ηζ, 1 ΚΗζ, 1.5 kHz, 2 kHz, 2. 5 kHz, 3 kHz, 4 kHz, 5 kHz, 10 kHz, 20KHz, 30KHz or 1幌Hz, using the characteristics of low-frequency alternating magnetic field penetration performance to control the communication within the specified distance range.

The circuit of the forward reception judging unit 2022 can usually be constituted by a PCB coil, an enameled wire coil or a Hall device, a giant magnetoresistance, a magnetic induction switch, or the like. This circuit is not limited to these components. In principle, any sensor that converts a change in the magnetic field into an electrical signal can be used in the module, the only restriction being that it can be placed in the device in which the unit is used.

In the magnetic signal communication embodiment, the controllable communication distance range is realized by using the low frequency alternating magnetic field, and the high speed wireless communication channel is used in combination with the reference unit 102 and the measuring unit 202 to realize reliable and fast connection of the main communication module 1 and the slave communication module 2, and simultaneously utilize The high-speed wireless communication channel between the first wireless communication unit 103 and the second wireless communication unit 203 realizes high-speed data communication between the main communication module 1 and the slave communication module 2. It has the following characteristics: 1. The reference unit 102 of the main communication module 1 transmits a low-frequency alternating magnetic field signal, and the communication module 2 only needs to receive the magnetic field signal, so that the receiving line or other receiving circuit can be miniaturized enough to satisfy the implantation. The compact requirement of the mobile device from the communication module 2; 2. Since the received signal is weak, it is necessary to add an amplifying circuit to the mobile device that is implanted from the communication module 2. In addition, the second wireless communication unit 203 simultaneously placed in the mobile device can be a high-speed wireless wireless communication unit (Wi-F i, Bluetooth) to realize two-way high-speed communication. As previously mentioned, the antennas of the reference unit 102 on the primary communication module 1 and the measurement unit 202 on the secondary communication module 2 are small and can be easily integrated into mobile devices.

The frequency points selected according to this embodiment (500Ηζ, 1ΚΗζ, 1.5KHz, 2KHz, 2. 5KHz, 3KHz, 4KHz, 5KHz, 10KHz, 20KHz, 30KHz or 1幌Hz), the system is more accurate in the working distance range below the frequency point. As an extension, it is not absolutely impossible for the system to work above these frequencies. The possible effect is that the accuracy range of the distance control is reduced, which is only an extended application of performance change.

In this embodiment, the distance determination is implemented by setting a threshold value in advance, that is, the main communication module transmits a low frequency magnetic signal according to a preset transmission parameter, and receives the low frequency signal from the communication module 2 and converts it into a voltage signal, which is The set threshold voltage value determines whether or not a predetermined effective distance interval is entered between the communication module 2 and the main communication module 1. This threshold is the same for all slave communication modules 2 and does not need to be modified for different slave communication modules 2 (so-called calibration).

In this embodiment, the first modulation circuit 10224 or the second modulation circuit 20234 can adopt multiple modulation modes:

1) Carrier modulation mode modulation: the baseband signal generated by the first coding circuit 10221 or the second coding circuit 20231 is modulated by the first modulation circuit 10224 or the second modulation circuit 20234, and the carrier may be a sine wave, a square wave, a triangular wave, or the like. The modulation can be switched frequency shift keying (00K), phase shift keying, frequency shift keying (FSK), etc., and the modulated signal is loaded to the first magnetic field emission line through the first driving circuit 10222 or the second driving circuit 20232. 10223 or a second magnetic field emission line 圏 20233;

2) Carrierless direct baseband transmission: The baseband signal generated by the first encoding circuit 10221 or the second encoding circuit 20231 is directly loaded to the first magnetic field emission line 10223 or the second magnetic field through the first driving circuit 10222 or the second driving circuit 20232. The launch line 圏 20233;

3) Other modulation methods: Since the present invention uses the threshold value judgment method for distance control, the modulation method is not suitable for amplitude modulation, and any modulation method capable of maintaining a substantially constant amplitude of the detection signal from the communication module 2 during transmission can be used. In the present invention;

The first encoding circuit 10221 or the second encoding circuit 20231 can adopt various encoding methods:

1) Manchester encoding: Bit 1 is encoded as two symbols 01 and bit 0 is encoded as 10.

2) Differential Manchester coding: There are two sequences of bit symbols: 01 and 10, bit 1 coding In order to be different from the previous symbol sequence, bit 0 is the same, or the encoding is reversed. 3) Other coding methods: Since the present invention performs the distance control by the method of threshold judgment, the low frequency modulation signal should keep the average value stable. In a preferred embodiment, the encoded sequence does not contain a DC component, and any encoding mode with an average DC component of zero after encoding can be used in the preferred embodiment.

In the above specific implementation circuit, the first magnetic field emission line 223 10223 or the second magnetic field ray 圏 20233 may be an enameled wire 圏 or a PCB 圏. The number of turns of the first magnetic field emission line 圏 10223 or the second magnetic field emission line 圏 20233 may be greater than 10 圏, and preferably, the number of turns is 50 to 500 。. Preferably, the first magnetic field emission line 223 10223 or the second magnetic field emission line 圏 20233 is filled with a ferrite core or a core. Preferably, the cross section of the area surrounded by the first magnetic field emission line 223 10223 or the second magnetic field emission line 233 20233 includes at least a circular area of 3 cm in diameter or a square area of 3 cm X 3 cm.

Ultrasonic signal communication embodiment

As shown in FIG. 4, in the present embodiment, the reference unit 102 includes a modulation and start control device 1023, a first ultrasonic transmitter 1024, a second ultrasonic transmitter 1025, and a third ultrasonic transmitter 1026. The modulation and activation control device 1023 respectively Connected to the first ultrasonic transmitter 1024, the second ultrasonic transmitter 1025, and the third ultrasonic transmitter 1026; wherein the modulation and activation control device 1023 is configured to modulate the main communication module information to the first distance reference signal, and simultaneously activate the first An ultrasonic transmitter 1024, a second ultrasonic transmitter 1025, and a third ultrasonic transmitter 1026 to transmit a distance-based signal in the form of ultrasonic waves; a first ultrasonic transmitter 1024, a second ultrasonic transmitter 1025, and a third ultrasonic transmitter 1026 are used for Send ultrasonic signals of different frequencies separately. The measuring unit 202 includes demodulation and time comparing means 2023, a first ultrasonic receiver 2024, a second ultrasonic receiver 2025 and a third ultrasonic receiver 2026; the demodulation and time comparing means 2023 respectively and the first ultrasonic receiver 2024, The second ultrasonic receiver 2025 is connected to the third ultrasonic receiver 2026; wherein, the first ultrasonic receiver 2024, the second ultrasonic receiver 2025, and the third ultrasonic receiver 2026 are configured to simultaneously receive the first ultrasonic transmitter 1024 and the second, respectively. The ultrasonic signals of different frequencies transmitted by the ultrasonic transmitter 1025 and the third ultrasonic transmitter 1026 transmit the received ultrasonic signals of different frequencies to the demodulation and time comparing means 2023; the demodulation and time comparing means 2023 are used for respectively Demodulate ultrasonic signals of different frequencies and according to ultrasonic signals of different frequencies The time difference of the arrival number determining unit 202 determines whether the distance between the main communication module 1 and the slave communication module 2 satisfies a preset range, and if so, transmits the main communication module information contained in the first distance reference signal to the second control unit 201. .

In this embodiment, the modulation and activation control device 1023 can modulate the main communication module information to the first distance reference signal in the ultrasonic form by the 00K method; the first ultrasonic receiver 2024, the second ultrasonic receiver 2025, and the third ultrasonic receiver. 2026 can only correspond to the first distance reference signals of different ultrasonic frequencies respectively transmitted by the first ultrasonic transmitter 1024, the second ultrasonic transmitter 1025 and the third ultrasonic transmitter 1026; for example, the first ultrasonic receiver 2024 can only receive the first The signal of the ultrasonic transmitter 1024, the second ultrasonic receiver 2025 can only receive the signal of the second ultrasonic transmitter 1025, and the third ultrasonic receiver 2026 can only receive the third ultrasonic transmitter 1026.

In this embodiment, the reference unit 102 can employ multiple modulation and activation control devices and three or more ultrasonic transmitters, and the corresponding measurement unit 202 can also employ multiple demodulation and time comparison devices and three or more ultrasonic receivers. However, the optimization scheme is a modulation and start control device, three acoustic wave transmitters, one demodulation and time comparison device and three ultrasonic receivers used in the embodiment.

In the present invention, the main communication module 1 transmits the main communication module information to the slave communication module 2 through the low frequency magnetic signal or the ultrasonic signal, and the bidirectional high speed wireless communication from the communication module 2 through the second wireless communication unit 203 and the first wireless communication unit 103. The communication channel returns the main communication module information to the main communication module 1. The main communication module 1 realizes the unique binding between the communication module 2 and the main communication module 1 by identifying the correctness of the returned main communication module information. . After the binding, the two-way high-speed large data amount communication between the main communication module 1 and the slave communication module 2 is completed by the two-way high-speed wireless communication channel between the first wireless communication unit 103 and the second wireless communication unit 203.

As an embodiment, the transmission of the first distance reference signal and the rapid establishment of the wireless communication connection and data exchange may not be performed at the same time. For example, the first distance reference signal is transmitted prior to quickly establishing a wireless communication connection and performing data exchange; or the primary communication module 1 intermittently transmits the first distance reference signal, and the primary communication module 1 and the secondary communication module 2 are in the transmission Fast data exchange between a distance reference signal. After the communication module 2 determines that the distance between the main communication module 1 and the slave communication module 2 satisfies a preset range according to the received first distance reference signal, and the main communication module 1 Before the communication module 2 quickly establishes a wireless communication connection according to a preset protocol and exchanges data, the main communication module 1 and the slave communication module 2 can disconnect the transmission of the first distance reference signal therebetween to prevent signals from interfering with each other and improve Transmission efficiency and measurement accuracy, the device structure is easy to operate and saves resources. Specifically, the following two methods can be used:

1) transmitting a determination signal from the communication module 2 to the main communication module 1, the main communication module 1 stops transmitting the first distance reference signal according to the received determination signal, and the main communication module 1 and the slave communication module 2 quickly establish wireless according to the preset protocol. Communication and data exchange;

2) The communication module first stops receiving the first distance reference signal, and the main communication module 1 and the slave communication module 2 quickly establish a wireless communication connection according to a preset protocol and perform data exchange.

The main communication module 1 and the slave communication module 2 in the present invention can be respectively disposed in different hosts. In this way, the main communication module information can also be the host information, so that the fast communication of the control communication range between the hosts can be realized.

The host includes, but is not limited to, a smart terminal and/or a smart vehicle or the like. Among them, smart terminals include desktop computers, notebook computers, tablets, PDAs, mobile phones, digital cameras, digital video cameras, electronic readers, audio and video playback devices, and digital photo frames; smart vehicles include smart cars or with data provided Interactive vehicles such as cars, trains, airplanes or ships.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

Claim

A main communication module, comprising: a reference unit, a first wireless communication unit, and a first control unit that controls operation of the reference unit and the first wireless communication unit, the reference unit is configured to wirelessly transmit the first The distance reference signal, the first wireless communication unit is configured to quickly establish a wireless communication connection and perform data exchange according to a preset protocol.

2. The primary communication module according to claim 1, wherein: the rate at which the first wireless communication unit establishes a wireless communication connection and performs data exchange is higher than a rate at which the reference unit transmits the first distance reference signal.

3. The main communication module according to claim 1, wherein: said first distance reference signal contains said main communication module information and communication distance information.

4. The main communication module according to claim 1, wherein: said reference unit comprises a first microcontroller, a first encoding circuit, a first driving circuit, and a first magnetic field transmitting line in series; The first microcontroller is configured to control the first encoding circuit and the first driving circuit; the first encoding circuit is configured to perform bit-by-bit encoding on the wireless data frame of the main communication module information, and transmit the data to the first driving circuit; The first driving circuit is configured to drive the first magnetic field emission line ;; the first magnetic field emission line is used to generate a first distance reference signal containing information of the main communication module and transmit in the form of a magnetic signal.

5. The main communication module according to claim 4, wherein: the reference unit further comprises a first modulation circuit disposed between the first encoding circuit and the first driving circuit; The main communication module information encoded by the first encoding circuit is modulated and transmitted to the first driving circuit.

The main communication module according to claim 4 or 5, wherein: the reference unit further comprises a second magnetic induction circuit, a second amplification circuit, and a second threshold determination and demodulation circuit, wherein the second magnetic induction circuit The second amplifying circuit, the second threshold determining and demodulating circuit and the first micro-controller are sequentially connected in series; the second magnetic inducting circuit is configured to inductively receive the second distance reference signal containing the signal transmitting source information in the form of a magnetic signal and Convert it into an electrical signal and send it to the second An amplifying circuit; the second amplifying circuit is configured to amplify and transmit the second distance reference signal to the second threshold determining and demodulating circuit; and the second threshold determining and demodulating circuit is configured to determine whether the second distance reference signal is Reaching a preset threshold value, if the preset threshold value is reached, transmitting signal source information in the second distance reference signal to the first microcontroller; the first microcontroller is configured to control the second magnetic induction circuit, a second amplifying circuit and a second threshold determining and demodulating circuit, and transmitting the received signal transmitting source information to the first control unit.

The master communication module according to any one of claims 1 to 5, wherein the first distance reference signal is a low frequency magnetic signal.

8. The main communication module according to claim 7, wherein: the frequency of the low frequency magnetic signal is 500 Hz, 1 ΚΗζ, 1 · 5 ΚΗζ, 2 ΚΗζ, 2 · 5 ΚΗζ, 3 ΚΗζ, 4 ΚΗζ, 5 ΚΗζ, 1 0 ΚΗζ, 20 ΚΗζ. , 30ΚΗζ or 10ΜΗζ.

9. The main communication module according to claim 8, wherein: the second distance reference signal is a low frequency magnetic signal.

The main communication module according to claim 9, wherein: the frequency of the low frequency magnetic signal is 500 Hz, 1 ΚΗζ, 1 · 5 ΚΗζ, 2 ΚΗζ, 2 · 5 ΚΗζ, 3 ΚΗζ, 4 ΚΗζ, 5 ΚΗζ, 1 0 ΚΗζ, 20ΚΗζ, 30ΚΗζ or 10ΜΗζ.

1 1. The main communication module according to claim 1, wherein:

The reference unit includes at least three ultrasonic transmitters and at least one modulation and start control device, wherein the modulation and start control devices are respectively connected to the ultrasonic transmitter; the modulation and start control device is configured to modulate the main communication module information into a first distance reference signal, and simultaneously activates the at least three ultrasonic transmitters; the at least three ultrasonic transmitters are configured to respectively transmit first distance reference signals in the form of ultrasonic waves of different frequencies.

The master communication module according to claim 1, wherein: said reference unit comprises three ultrasonic transmitters and one modulation and start control device.

The main communication module according to any one of claims 1 to 3, wherein the first distance reference signal is an ultrasonic signal.

The master communication module according to any one of claims 1 to 5, wherein the first wireless communication unit is a Wi-F i module, a Bluetooth module or a UWB module.

The master communication module according to any one of claims 1 to 5, 11 or 12, wherein: the wireless communication frequency band of the first wireless communication unit is 433 MHz, 90 Hz, 2. 4 GHz, 5. 8GHz or 60GHz.

The main communication module according to any one of claims 1 to 5, 11 or 12, wherein: the reference unit transmits a first distance reference signal and the first wireless communication unit is quickly established according to a preset protocol. The wireless communication connection and data exchange are not performed at the same time.

The main communication module according to claim 16, wherein: the reference unit transmits a first distance reference signal, and the first wireless communication unit quickly establishes a wireless communication connection according to a preset protocol and performs data. exchange.

The master communication module according to claim 16, wherein: the reference unit intermittently transmits the first distance reference signal, and the first wireless communication unit performs fast data exchange between the transmitting the first distance reference signal .

A slave communication module, comprising: a measurement unit, a second wireless communication unit, and a second control unit that controls operation of the measurement unit and the second wireless communication unit; the measurement unit is configured to receive a first distance Determining, according to the first distance reference signal, whether a communication distance between the communication module and a signal transmission source that issues the first distance reference signal satisfies a preset range, and if satisfied, the second wireless communication unit is fast according to a preset protocol. Establish a wireless communication connection and exchange data.

The slave communication module according to claim 19, wherein: the rate at which the second wireless communication unit establishes a wireless communication connection and performs data exchange is higher than a rate at which the measurement unit receives the first distance reference signal.

The master communication module according to claim 19, wherein: said first distance reference signal contains signal transmission source information and communication distance information.

The slave communication module according to claim 21, wherein: the measuring unit comprises a first magnetic induction circuit, a first amplification circuit, a first threshold determination and demodulation circuit, and a second microcontroller connected in series The first magnetic induction circuit is configured to inductively receive a first distance reference signal in the form of a magnetic signal and convert it into an electrical signal form, and transmit the same to the first amplification circuit; the first amplification circuit is configured to use the first distance reference The signal is amplified and transmitted to the first threshold to determine and resolve The first threshold determining and demodulating circuit is configured to determine whether the first distance reference signal reaches a preset threshold, and if the preset threshold is reached, the signal included in the first distance reference signal Transmitting source information is transmitted to the second microcontroller; the second microcontroller is configured to control the first magnetic induction circuit, the first amplifying circuit and the first threshold determining and demodulating circuit, and transmit the received signal transmitting source information to The second control unit.

The slave communication module according to claim 22, wherein: the determining unit further comprises a second encoding circuit, a second driving circuit, and a second magnetic field emission line; the second microcontroller, the second The encoding circuit, the second driving circuit and the second magnetic field emission line are sequentially connected in series; the second microcontroller is for controlling the second encoding circuit and the second driving circuit; and the second encoding circuit is for information about the slave communication module The wireless data frame is bit-by-bit encoded and transmitted to the second driving circuit; the second driving circuit is configured to drive the second magnetic field emission line ;; and the second magnetic field emission line is used to generate the containing communication module The second distance reference signal of the information is transmitted as a magnetic signal.

The slave communication module according to claim 23, wherein: the determining unit further comprises a second modulation circuit disposed between the second encoding circuit and the second driving circuit; The slave communication module information encoded by the second encoding circuit is modulated and transmitted to the second driver circuit.

The slave communication module according to any one of claims 19 to 24, characterized in thatsaid first distance reference signal is a low frequency magnetic signal.

The slave communication module according to claim 25, wherein: the frequency of the low frequency magnetic signal is 500 Hz, 1 ΚΗζ, 1 · 5 ΚΗζ, 2 ΚΗζ, 2 · 5 ΚΗζ, 3 ΚΗζ, 4 ΚΗζ, 5 ΚΗζ, 10 ΚΗζ, 20 ΚΗζ, 30ΚΗζ or 1幌Ηζ.

The slave communication module according to claim 23 or 24, wherein the second distance reference signal is a low frequency magnetic signal.

The slave communication module according to claim 27, wherein: the frequency of the low frequency magnetic signal is 500 Hz, 1 ΚΗζ, 1 · 5 ΚΗζ, 2 ΚΗζ, 2 · 5 ΚΗζ, 3 ΚΗζ, 4 ΚΗζ, 5 ΚΗζ, 1 0 ΚΗζ, 20 ΚΗζ, 30ΚΗζ or 1幌Ηζ.

29. The slave communication module of claim 21, wherein: The measuring unit includes at least three ultrasonic receivers and at least one demodulation and time comparison device, and the ultrasonic receivers are respectively connected to the demodulation and time comparison device;

The at least three ultrasonic receivers are configured to simultaneously receive first distance reference signals of different ultrasonic frequencies, and transmit the first distance reference signals to a demodulation and time comparison device; the demodulation and time comparison device is used for Demodulating the first distance reference signals of different ultrasonic frequencies respectively, and determining whether the communication distance between the communication module and the signal transmission source satisfies a preset according to a time difference of the first distance reference signal of the different ultrasonic frequencies reaching the measuring unit The range, if satisfied, transmits the signal transmission source information contained in the first distance reference signal to the second control unit.

The slave communication module according to any one of claims 19 to 21, wherein the first distance reference signal is an ultrasonic signal.

The master communication module according to any one of claims 19 to 24, wherein the second wireless communication unit is a Wi-F i module, a Bluetooth module or a UWB module.

The main communication module according to any one of claims 19 to 24, wherein the wireless communication band of the second wireless communication unit is 433 MHz, 90 Hz, 2.4 GHz, 5. 8 GHz or 60GHz.

The main communication module according to any one of claims 19 to 24, wherein the measuring unit receives the first distance reference signal and the second wireless communication unit quickly establishes a wireless communication connection according to a preset protocol. Data exchange is not performed at the same time.

The main communication module according to claim 33, wherein: the measuring unit receives the first distance reference signal, and the second wireless communication unit quickly establishes a wireless communication connection according to a preset protocol and performs data exchange.

The main communication module according to claim 33, wherein: said measuring unit intermittently receives a first distance reference signal, and said second wireless communication unit performs fast between said receiving said first distance reference signal Data exchange.