CN107623544B - Intelligent repeater and communication method based on same - Google Patents
Intelligent repeater and communication method based on same Download PDFInfo
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- CN107623544B CN107623544B CN201710624090.5A CN201710624090A CN107623544B CN 107623544 B CN107623544 B CN 107623544B CN 201710624090 A CN201710624090 A CN 201710624090A CN 107623544 B CN107623544 B CN 107623544B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention is suitable for the field of mobile communication, and provides an intelligent repeater and a communication method based on the intelligent repeater, wherein the repeater comprises: an NxN MIMO external antenna, a radio frequency coupler, a control circuit, an N-path direct-amplifying circuit and an NxN MIMO internal antenna; the control circuit is used for detecting and screening out the optimal LTE channel frequency band in the coupled downlink signal in real time according to a preset rule, dynamically adjusting the amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sending a control instruction to the N paths of direct-current discharge circuits in real time; the N paths of direct amplifying circuits are used for filtering signals except for the signal of the optimal LTE channel frequency band in the downlink signal and the uplink signal according to the control instruction of the control circuit, amplifying the signal of the optimal LTE channel frequency band according to the dynamically adjusted amplifying gain and then outputting the amplified signal; the invention can effectively ensure the quality of the output signal amplified by the repeater and avoid the interference of the over-strong signal to the base station network.
Description
Technical Field
The invention belongs to the field of mobile communication, and particularly relates to an intelligent repeater and a communication method based on the intelligent repeater.
Background
The repeater is one of the wireless signal repeaters, and its main function is to amplify signals in wireless communication transmission. In the downlink, the repeater receives signals through the forward antenna, filters the received signals through the band-pass filter, and then amplifies the filtered signals through the power amplifier and transmits the amplified signals to the coverage area through the backward antenna so as to achieve signal transmission between the base station and the mobile station.
The existing repeater is designed to provide a bidirectional signal amplification function by adopting a mode of presetting a fixed frequency band and a gain, so as to solve the problem of extension coverage of a wide operator and small and medium-sized enterprises on a 4G signal coverage insufficient area. However, on one hand, since the preset amplified frequency band is fixed, and the device cannot flexibly adapt to FDD (Frequency Division Duplexing, frequency division duplex) or TDD (Time Division Duplexing, time division duplex) channel allocation of different operators, the universality and the usability of the device are affected, and the customization of the device according to the operators and the delivery areas is required; on the other hand, the fixed gain setting may cause the repeater device to generate strong signal interference to the base station in a close range, which affects the performance of network coverage of the base station; moreover, since the width of the preset amplified frequency band is generally larger than the bandwidth of the actually used frequency band, serious intermodulation interference of the amplified adjacent frequency band signals is easily caused, and the quality of the amplified signals is rapidly reduced.
Therefore, a repeater design is required to solve the problems caused by the preset fixed frequency band and gain.
Disclosure of Invention
The invention provides an intelligent repeater and a communication method based on the intelligent repeater, and aims to provide the intelligent repeater which can intelligently select an optimal LTE channel frequency band according to the current signal environment and dynamically adjust amplification gain according to the signal intensity of the selected frequency band, so that the quality of an output signal amplified by the repeater is effectively ensured, and the interference of an over-strong signal on a base station network is avoided.
The invention provides an intelligent repeater, which comprises an NxN MIMO external antenna, a radio frequency coupler, a control circuit, an N-path repeater and an NxN MIMO internal antenna;
the N paths of direct-discharge circuits are wirelessly connected between the N multiplied by N type MIMO external antenna and the N multiplied by N type MIMO internal antenna, wherein 1 path of direct-discharge circuits are wirelessly connected with the N multiplied by N type MIMO external antenna through the radio frequency coupler, one end of the control circuit is connected with the radio frequency coupler, and the other end of the control circuit is respectively connected with the N paths of direct-discharge circuits;
the radio frequency coupler is used for receiving downlink signals sent by the base station in real time by utilizing the N multiplied by N MIMO external antenna and dividing the downlink signals into 2 paths, wherein 1 path of downlink signals are input into the control circuit, and the other 1 path of downlink signals are input into the direct-amplifying circuit connected with the control circuit;
the control circuit is used for detecting and screening out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusting amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sending a control instruction to the N paths of direct-current discharge circuits in real time;
the N-path repeater is configured to filter, according to a control instruction of the control circuit, a signal except for a signal of the optimal LTE channel band from a downlink signal and an uplink signal, and amplify the signal of the optimal LTE channel band according to a dynamically adjusted amplification gain, and then output the amplified signal, where the uplink signal is a communication signal received by the n×n MIMO internal antenna and sent from a user wireless terminal to a base station.
Further, each 1 direct-current discharge circuit in the N direct-current discharge circuits includes: the multi-band down-amplifier and the multi-band up-amplifier are respectively connected between the input radio frequency front-end circuit and the output radio frequency front-end circuit;
the input radio frequency front-end circuit is used for filtering signals except the optimal LTE channel frequency band in downlink signals and uplink signals according to a control instruction of the control circuit, inputting the downlink signals of the optimal LTE channel frequency band into the multi-frequency downlink amplifier, inputting the uplink signals of the optimal LTE channel frequency band into the N multiplied by N MIMO external antenna, and outputting the uplink signals by the N multiplied by N MIMO external antenna;
the multi-band downlink amplifier is configured to amplify the downlink signal of the optimal LTE channel band according to a dynamically adjusted amplification gain according to a control instruction of the control circuit, and input the amplified downlink signal into the output radio frequency front-end circuit;
the output radio frequency front-end circuit is used for filtering signals except the optimal LTE channel frequency band in uplink signals and downlink signals according to a control instruction of the control circuit, inputting the uplink signals of the optimal LTE channel frequency band into the multi-frequency band uplink amplifier, inputting the downlink signals of the optimal LTE channel frequency band into the N multiplied by N type MIMO internal antenna, and outputting the signals by the N multiplied by N type MIMO internal antenna;
the multi-band uplink amplifier is configured to amplify the uplink signal of the optimal LTE channel band according to a dynamically adjusted amplification gain according to a control instruction of the control circuit, and input the amplified uplink signal into the input radio frequency front-end circuit.
Further, the control circuit includes: the radio frequency front-end circuit, the radio frequency modem and the LTE baseband processing unit are connected in sequence;
the radio frequency front-end circuit is used for filtering downlink signals outside a customized preset frequency band according to the instruction of the LTE baseband processing unit and providing the filtered downlink signals for the radio frequency modem;
the radio frequency modem is used for demodulating the downlink signal and outputting the demodulated downlink signal to the LTE baseband processing unit;
the LTE baseband processing unit is used for receiving the downlink signal in real time, detecting and screening out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusting amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sending a control instruction to the N paths of direct-current discharge circuits in real time.
Further, the radio frequency front end circuit, the input radio frequency front end circuit and the output radio frequency front end circuit all comprise: the RF switch, the duplexer and the filter are connected in sequence.
Further, the n×n MIMO external antenna is a 2×2 MIMO external antenna.
The invention also provides a communication method based on the intelligent repeater, which comprises the following steps:
the radio frequency coupler receives downlink signals sent by the base station in real time by utilizing an N multiplied by N MIMO external antenna and divides the downlink signals into 2 paths, wherein 1 path of downlink signals are input into the control circuit, and the other 1 path of downlink signals are input into the direct-amplifying circuit connected with the direct-amplifying circuit;
the control circuit detects and screens out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusts amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sends a control instruction to the N paths of direct-current discharge circuits in real time;
and the N paths of direct-discharge circuits filter out signals except the signals of the optimal LTE channel frequency band in downlink signals and uplink signals according to the control instruction of the control circuit, amplify the signals of the optimal LTE channel frequency band according to the dynamically adjusted amplification gain and output the amplified signals, wherein the uplink signals are communication signals which are received by utilizing the N multiplied by N type MIMO internal antenna and are sent to a base station by a user wireless terminal.
Further, the N-path direct-current discharging circuit filters signals except the signal of the optimal LTE channel frequency band in the downlink signal according to the control instruction of the control circuit, amplifies the signal of the optimal LTE channel frequency band according to the dynamically adjusted amplification gain, and outputs the amplified signal, including:
an input radio frequency front-end circuit in the N paths of direct-amplifying circuits filters signals except the signal of the optimal LTE channel frequency band in downlink signals according to a control instruction of the control circuit, and inputs the downlink signals of the optimal LTE channel frequency band into the multi-band downlink amplifier;
the multi-band downlink amplifier amplifies the downlink signal of the optimal LTE channel frequency band according to a control instruction of the control circuit and the dynamically adjusted amplification gain, and inputs the amplified downlink signal into the output radio frequency front-end circuit;
and the output radio frequency front-end circuit filters signals except the optimal LTE channel frequency band in downlink signals according to a control instruction of the control circuit, inputs the downlink signals of the optimal LTE channel frequency band into the N multiplied by N MIMO internal antenna, and outputs the signals by the N multiplied by N MIMO internal antenna.
Further, the N-path direct-current discharging circuit filters signals except the signal of the optimal LTE channel frequency band in the uplink signal according to the control instruction of the control circuit, amplifies the signal of the optimal LTE channel frequency band according to the dynamically adjusted amplification gain, and outputs the amplified signal, and further includes:
the output radio frequency front-end circuit in the N paths of direct amplifying circuits filters signals except the signal of the optimal LTE channel frequency band in the uplink signals according to the control instruction of the control circuit, and inputs the uplink signals of the optimal LTE channel frequency band into the multi-band uplink amplifier;
the multi-band uplink amplifier amplifies the uplink signal of the optimal LTE channel band according to a control instruction of the control circuit and the dynamically adjusted amplification gain, and inputs the amplified uplink signal into the input radio frequency front-end circuit;
and the input radio frequency front-end circuit filters out signals except the optimal LTE channel frequency band in uplink signals according to a control instruction of the control circuit, inputs the uplink signals of the optimal LTE channel frequency band into the N multiplied by N MIMO external antenna, and outputs the uplink signals by the N multiplied by N MIMO external antenna.
Further, the control circuit detects and screens out the optimal LTE channel frequency band in the downlink signal in real time according to a rule preset by clients, dynamically adjusts the amplification gain according to the signal strength of the optimal LTE channel frequency band, and sends out a control instruction to the N-path direct-discharge circuit in real time, including:
the radio frequency front-end circuit in the control circuit filters downlink signals outside a customized preset frequency band according to the instruction of the LTE baseband processing unit and provides the filtered downlink signals for the radio frequency modem;
the radio frequency modem in the control circuit demodulates the downlink signal and outputs the demodulated downlink signal to the LTE baseband processing unit;
and an LTE baseband processing unit in the control circuit receives the downlink signal in real time, detects and screens out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusts amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sends a control instruction to the N paths of direct-current discharge circuits in real time.
Further, the radio frequency front end circuit, the input radio frequency front end circuit and the output radio frequency front end circuit all comprise: the RF switch, the duplexer and the filter are connected in sequence.
Compared with the prior art, the invention has the beneficial effects that: the invention provides an intelligent repeater and a communication method based on the intelligent repeater.A radio frequency coupler in the intelligent repeater is used for receiving downlink signals sent by a base station in real time by utilizing the N multiplied by N MIMO external antenna and dividing the downlink signals into 2 paths, wherein 1 path of downlink signals are input into a control circuit; the control circuit in the intelligent repeater is used for detecting and screening out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusting the amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sending a control instruction to the N paths of direct-current discharge circuits in real time; the N paths of direct-discharge circuits in the intelligent direct-discharge station are used for filtering signals except the signal of the optimal LTE channel frequency band in the downlink signal and the uplink signal according to the control instruction of the control circuit, amplifying the signal of the optimal LTE channel frequency band according to the dynamically adjusted amplification gain and outputting the amplified signal; compared with the prior art, the invention can intelligently select the optimal LTE channel frequency band according to the current signal environment, dynamically adjust the amplification gain according to the signal intensity of the selected frequency band, and realize the purpose of real-time dynamic adjustment control of the amplification frequency band and the gain, thereby flexibly adapting the FDD or TDD channel allocation of different operators, avoiding the interference of the over-strong signal on the base station network and effectively improving the signal quality amplified by the repeater.
Drawings
Fig. 1 is a schematic diagram of a circuit module of an intelligent repeater according to an embodiment of the present invention;
fig. 2 is a flow chart of a communication method of an intelligent repeater according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Because the repeater provided in the prior art adopts a mode of presetting a fixed frequency band and a gain to provide a bidirectional signal amplification function, the amplified signal quality is poor, a base station network can be interfered, and the technical problems of FDD or TDD channel allocation of different operators cannot be flexibly realized.
In order to solve the above technical problems, the present invention provides an intelligent repeater and a communication method based on the intelligent repeater, as shown in fig. 1, a radio frequency coupler receives a downlink signal sent from a base station in real time by using an nxn MIMO external antenna, and divides the downlink signal into 2 paths, wherein 1 path of downlink signal is input into a control circuit; the control circuit detects and screens out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusts amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sends a control instruction to the N paths of direct-current discharge circuits in real time; and the N paths of direct-current discharge circuits filter out signals except the signal of the optimal LTE channel frequency band in the downlink signal and the uplink signal according to the control instruction of the control circuit, amplify the signal of the optimal LTE channel frequency band according to the dynamically adjusted amplification gain and then output the amplified signal.
The following specifically describes an intelligent repeater provided in an embodiment of the present invention, as shown in fig. 1, including: the device comprises an NxN MIMO external antenna, a radio frequency coupler, a control circuit, an N-path direct-amplifying circuit and an NxN MIMO internal antenna.
The N paths of direct-discharge circuits are wirelessly connected between the N×N type MIMO external antenna and the N×N type MIMO internal antenna, wherein 1 path of direct-discharge circuits are wirelessly connected with the N×N type MIMO external antenna through the radio frequency coupler, one end of the control circuit is connected with the radio frequency coupler, and the other end of the control circuit is respectively connected with the N paths of direct-discharge circuits.
Specifically, the n×n MIMO external antenna provided by the embodiment of the present invention is a 2×2 MIMO external antenna, the n×n MIMO internal antenna is a 2×2 MIMO internal antenna, and the N-path direct-amplifying circuit is a 2-path direct-amplifying circuit, as shown in fig. 1, and includes a direct-amplifying circuit 1 and a direct-amplifying circuit 2, where the direct-amplifying circuit 1 and the direct-amplifying circuit 2 are both bidirectional direct-amplifying circuits, and the radio frequency coupler provided by the embodiment of the present invention is connected with the direct-amplifying circuit 1.
Specifically, the transmission path of the downlink signal sent by the base station to the mobile station at the intelligent repeater is: and downlink signals are sent to the 2-path direct-amplifying circuit through the 2X2 MIMO external antenna and are sent to the mobile station through the N X N MIMO internal antenna. The uplink signal sent by the mobile station to the base station is transmitted by the intelligent repeater on the transmission path: and the uplink signal is sent to the 2-path direct-amplifying circuit through the 2x2 MIMO internal antenna and is sent to the mobile station through the N x N MIMO external antenna. The radio frequency coupler is used for receiving the downlink signals sent by the NxN MIMO external antenna in real time and dividing the downlink signals into 2 paths, wherein 1 path of downlink signals are input into the control circuit, and the other 1 path of downlink signals are input into the direct-amplifying circuit connected with the control circuit.
Specifically, the radio frequency coupler includes: the radio frequency coupler divides a downlink signal from a base station into 2 paths of signals according to the power proportion, wherein a large proportion of power signals are input into the direct-current circuit 1 through the direct-current end, and a small proportion of power signals are input into the control circuit through the coupling end.
The control circuit is used for detecting and screening out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusting amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sending a control instruction to the N paths of direct-current discharge circuits in real time;
specifically, the control circuit includes: the radio frequency front end circuit RF_IN FEM, the radio frequency modem RF_IC and the LTE baseband processing unit LTE BB are connected IN sequence.
The radio frequency front-end circuit is used for filtering downlink signals outside a customized preset frequency band according to the instruction of the LTE baseband processing unit and providing the filtered downlink signals for the radio frequency modem;
specifically, the customized preset frequency band refers to a frequency band preset by a client according to needs, for example, if the client only needs to screen the best LTE channel frequency band from the mobile operator, the customized preset frequency band can be set as a frequency band supported by the mobile operator; for another example, if the client needs to screen out the optimal LTE channel band in the specified interval band, the customized preset band can be set as the specified interval band; in practice, the customer can set a frequency range according to the needs of the customer, and the radio frequency front-end circuit can filter the downlink signals outside the customized preset frequency range.
Specifically, the radio frequency front-end circuit comprises a radio frequency switch, a duplexer and a filter which are sequentially connected.
Specifically, the repeater provided by the embodiment of the invention is a 4G intelligent repeater, which can be adapted to a single or a plurality of operators (supporting operators with different global standards), before the intelligent repeater is put into use, a designated operator can be preset according to the needs of a user, and when the intelligent repeater is put into use after the preset, the radio frequency front-end circuit filters downlink signals outside the frequency band of the designated operator according to the instruction of the LTE baseband processing unit, so that the LTE baseband processing unit can only screen the optimal LTE channel frequency band from the frequency band signals of the designated operator; namely, the intelligent repeater only amplifies the frequency band signals of the appointed operators, so that the benefits and benefits of equipment investment operators are well protected.
The radio frequency modem is used for demodulating the downlink signal and outputting the demodulated downlink signal to the LTE baseband processing unit;
the LTE baseband processing unit is used for receiving the downlink signal in real time, detecting and screening out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusting amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sending a control instruction to the N paths of direct-current discharge circuits in real time.
Specifically, the preset rules can be preset according to the needs of the clients, the preset rules can be flexibly set according to the needs of the clients, and the optimal LTE channel frequency band can be screened from the preset frequency bands according to the preset rules. For example, if the preset frequency band is set by the mobile operator, the LTE baseband processing unit detects and screens the optimal LTE channel frequency band in real time from the frequency band supported by the mobile operator according to the preset rule; if the preset frequency band is set to be the appointed interval frequency band, the LTE baseband processing unit detects and screens the optimal LTE channel frequency band in real time from the appointed interval frequency band according to a preset rule capable of being customized; that is, in real time, the LTE baseband processing unit may screen out the optimal LTE channel band from the customized preset band according to a rule that may be customized and preset.
Specifically, the downlink signal demodulated by the radio frequency modem is sent to the LTE baseband processing unit LTE BB, and the LTE baseband processing unit performs air interface protocol processing on the downlink signal. And the LTE baseband processing unit scans and screens the channels of each frequency band in the downlink signal, and according to the result of full-channel scanning, the LTE BB can detect and screen the optimal LTE channel frequency band in real time according to a preset rule which can be customized, and calculates the required amplification gain, so as to control the bidirectional direct amplifying circuit to carry out bidirectional amplification on the external and internal signals on the signals of the appointed optimal LTE channel frequency band. It should be noted that, the LTE BB may continuously perform scanning and screening of the base station signal around the physical location of the repeater, if the wireless environment or the network signal changes, the LTE BB may detect in real time and select a more suitable amplification frequency band to operate, so as to ensure that the user can always enjoy the coverage of the best network signal, and also can well support the dual-antenna MIMO amplification capability.
The N-path repeater is configured to filter, according to a control instruction of the control circuit, a signal except for a signal of the optimal LTE channel band from a downlink signal and an uplink signal, and amplify the signal of the optimal LTE channel band according to a dynamically adjusted amplification gain, and then output the amplified signal, where the uplink signal is a communication signal received by the n×n MIMO internal antenna and sent from a user wireless terminal to a base station.
Specifically, each 1-way direct-current discharge circuit in the N-way direct-current discharge circuits comprises: the multi-band down-conversion circuit comprises an input radio frequency front-end circuit RF_IN FEM, an output radio frequency front-end circuit RF_OUT FEM, a multi-band down-conversion amplifier (multi-band RX_PA) and a multi-band up-conversion amplifier (multi-band TX_PA), wherein the multi-band down-conversion amplifier and the multi-band up-conversion amplifier are respectively connected between the input radio frequency front-end circuit and the output radio frequency front-end circuit.
Specifically, the embodiment of the invention shows the design of the 2-channel intelligent repeater, and can support a 2x2 MIMO working mode. The RF_IN FEM and the RF_OUT FEM IN each path of direct amplifying circuit are responsible for the combined collection of amplified signals IN the external and internal directions, and form bidirectional amplification of internal and external signals together with the multi-frequency band RX_PA and the multi-frequency band TX_PA.
More specifically, the rf_in FEM and rf_out FEM IN the repeater circuit have required LTE frequency band selection and filtering functions, the specific circuit is composed of a radio frequency switch, a duplexer and a filter which are sequentially connected, and is responsible for separating or aggregating the transmitted signals and performing bandpass filtering, and the rf_in FEM and rf_out FEM designs can support FDD and TDD operation modes, and the operation frequency band selection is controlled by lte_bb. The multi-band RX_PA and the multi-band TX_PA adopt multi-channel broadband power amplification devices to realize the low-cost multi-band broadband amplification function, and the frequency band selection and the gain control of the amplifier are controlled by the LTE BB.
Specifically, the input rf front-end circuit is configured to filter, according to a control instruction of the control circuit, signals except the optimal LTE channel band from a downlink signal and an uplink signal, input the downlink signal of the optimal LTE channel band to the multi-band downlink amplifier, input the uplink signal of the optimal LTE channel band to the n×n MIMO external antenna, and output the uplink signal from the n×n MIMO external antenna.
The multi-band downlink amplifier is configured to amplify the downlink signal of the optimal LTE channel band according to a dynamically adjusted amplification gain according to a control instruction of the control circuit, and input the amplified downlink signal to the output radio frequency front-end circuit.
The output radio frequency front-end circuit is used for filtering signals except the optimal LTE channel frequency band in uplink signals and downlink signals according to a control instruction of the control circuit, inputting the uplink signals of the optimal LTE channel frequency band into the multi-frequency band uplink amplifier, inputting the downlink signals of the optimal LTE channel frequency band into the N multiplied by N type MIMO internal antenna, and outputting the signals by the N multiplied by N type MIMO internal antenna;
the multi-band uplink amplifier is configured to amplify the uplink signal of the optimal LTE channel band according to a dynamically adjusted amplification gain according to a control instruction of the control circuit, and input the amplified uplink signal into the input radio frequency front-end circuit.
According to the intelligent repeater provided by the embodiment of the invention, the optimal LTE channel frequency band of the authorized operator is intelligently selected to carry out strict bandpass filtering bidirectional amplification according to the surrounding environment of equipment and the existing 4G network signals, and the amplification gain is dynamically adjusted according to the received signal strength of the selected frequency band, so that the real-time dynamic adjustment control purpose of the amplification frequency band and the gain is realized, the allocation of FDD or TDD channels of different operators can be flexibly adapted, the interference of the excessive signals on a base station network is avoided, and the signal quality amplified by the repeater can be effectively improved; the intelligent repeater provided by the embodiment of the invention can well solve the problem of extension coverage of wide operators and small and medium-sized enterprises to areas with insufficient coverage of 4G signals, effectively ensure the quality of extension coverage signals and provide MIMO signal direct-amplifying coverage capability required by a 4G network; the intelligent repeater designed by the invention has good universality, can greatly simplify the problem of equipment installation, is automatically suitable for various applications and network environments, becomes an intelligent repeater system truly meeting the 4G requirement, and can be applied to the design application of LTE wireless MIMO repeater.
The following specifically describes a communication method of an intelligent repeater provided in an embodiment of the present invention, as shown in fig. 2, where the method includes:
step S101, a radio frequency coupler receives downlink signals sent by a base station in real time by utilizing an N multiplied by N MIMO external antenna and divides the downlink signals into 2 paths, wherein 1 path of downlink signals are input into a control circuit, and the other 1 path of downlink signals are input into a direct-amplifying circuit connected with the control circuit;
step S102, the control circuit detects and screens out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusts amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sends a control instruction to the N paths of direct-current discharge circuits in real time;
specifically, a radio frequency front-end circuit in the control circuit filters downlink signals outside a customized preset frequency band according to an instruction of the LTE baseband processing unit, and provides the filtered downlink signals to a radio frequency modem; the radio frequency modem in the control circuit demodulates the downlink signal and outputs the demodulated downlink signal to the LTE baseband processing unit; and an LTE baseband processing unit in the control circuit receives the downlink signal in real time, detects and screens out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusts amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sends a control instruction to the N paths of direct-current discharge circuits in real time.
And step S103, the N paths of direct-current discharge circuits filter out signals except the signal of the optimal LTE channel frequency band in downlink signals and uplink signals according to the control instruction of the control circuit, amplify the signal of the optimal LTE channel frequency band according to the dynamically adjusted amplification gain and output the amplified signal, wherein the uplink signals are communication signals which are received by utilizing the N multiplied by N type MIMO internal antenna and are sent to a base station by a user wireless terminal.
Specifically, a signal processing process and a signal flow direction of a downlink signal and an uplink signal in the N paths of direct amplifying circuits are specifically introduced;
regarding the downstream signal:
an input radio frequency front-end circuit in the N paths of direct-amplifying circuits filters signals except the signal of the optimal LTE channel frequency band in downlink signals according to a control instruction of the control circuit, and inputs the downlink signals of the optimal LTE channel frequency band into the multi-band downlink amplifier; the multi-band downlink amplifier amplifies the downlink signal of the optimal LTE channel frequency band according to a control instruction of the control circuit and the dynamically adjusted amplification gain, and inputs the amplified downlink signal into the output radio frequency front-end circuit; and the output radio frequency front-end circuit filters signals except the optimal LTE channel frequency band in downlink signals according to a control instruction of the control circuit, inputs the downlink signals of the optimal LTE channel frequency band into the N multiplied by N MIMO internal antenna, and outputs the signals by the N multiplied by N MIMO internal antenna.
Regarding the uplink signal:
the output radio frequency front-end circuit in the N paths of direct amplifying circuits filters signals except the signal of the optimal LTE channel frequency band in the uplink signals according to the control instruction of the control circuit, and inputs the uplink signals of the optimal LTE channel frequency band into the multi-band uplink amplifier; the multi-band uplink amplifier amplifies the uplink signal of the optimal LTE channel band according to a control instruction of the control circuit and the dynamically adjusted amplification gain, and inputs the amplified uplink signal into the input radio frequency front-end circuit; and the input radio frequency front-end circuit filters out signals except the optimal LTE channel frequency band in uplink signals according to a control instruction of the control circuit, inputs the uplink signals of the optimal LTE channel frequency band into the N multiplied by N MIMO external antenna, and outputs the uplink signals by the N multiplied by N MIMO external antenna.
Specifically, the radio frequency front end circuit, the input radio frequency front end circuit and the output radio frequency front end circuit all comprise: the RF switch, the duplexer and the filter are connected in sequence.
Specifically, the n×n MIMO external antenna is a 2×2 MIMO external antenna.
According to the communication method of the intelligent repeater, the optimal LTE channel frequency band of the authorized operator is intelligently selected to carry out strict bandpass filtering bidirectional amplification according to the surrounding environment of equipment and the existing 4G network signals, and the amplification gain is dynamically adjusted according to the received signal strength of the selected frequency band, so that the purposes of real-time dynamic adjustment control of the amplification frequency band and the gain are achieved, FDD or TDD channel allocation of different operators can be flexibly adapted, the interference of the excessive signals on a base station network is avoided, and the signal quality amplified by the repeater can be effectively improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. The intelligent repeater is characterized by comprising an NxN MIMO external antenna, a radio frequency coupler, a control circuit, an N-path repeater circuit and an NxN MIMO internal antenna, wherein N is a positive integer greater than 1;
the N paths of direct-discharge circuits are wirelessly connected between the N multiplied by N type MIMO external antenna and the N multiplied by N type MIMO internal antenna, wherein 1 path of direct-discharge circuits are wirelessly connected with the N multiplied by N type MIMO external antenna through the radio frequency coupler, one end of the control circuit is connected with the radio frequency coupler, and the other end of the control circuit is respectively connected with the N paths of direct-discharge circuits;
the radio frequency coupler is used for receiving downlink signals sent by the base station in real time by utilizing the N multiplied by N MIMO external antenna and dividing the downlink signals into 2 paths, wherein 1 path of downlink signals are input into the control circuit, and the other 1 path of downlink signals are input into the direct-amplifying circuit connected with the control circuit;
the control circuit is used for detecting and screening out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusting amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sending a control instruction to the N paths of direct-current discharge circuits in real time;
the N-path repeater is configured to filter, according to a control instruction of the control circuit, a signal except for a signal of the optimal LTE channel band from a downlink signal and an uplink signal, and amplify the signal of the optimal LTE channel band according to a dynamically adjusted amplification gain, and then output the amplified signal, where the uplink signal is a communication signal received by the n×n MIMO internal antenna and sent from a user wireless terminal to a base station; the N multiplied by N type MIMO external antenna is a 2 multiplied by 2 type MIMO external antenna;
the control circuit includes: the radio frequency front-end circuit, the radio frequency modem and the LTE baseband processing unit are connected in sequence;
the radio frequency front-end circuit is used for filtering downlink signals outside a customized preset frequency band according to the instruction of the LTE baseband processing unit and providing the filtered downlink signals for the radio frequency modem;
the radio frequency modem is used for demodulating the downlink signal and outputting the demodulated downlink signal to the LTE baseband processing unit;
the LTE baseband processing unit is used for receiving the downlink signal in real time, detecting and screening out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusting amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sending a control instruction to the N paths of direct-current discharge circuits in real time.
2. The intelligent repeater as recited in claim 1, wherein each 1 of the N repeater circuits comprises: the multi-band down-amplifier and the multi-band up-amplifier are respectively connected between the input radio frequency front-end circuit and the output radio frequency front-end circuit;
the input radio frequency front-end circuit is used for filtering signals except the optimal LTE channel frequency band in downlink signals and uplink signals according to a control instruction of the control circuit, inputting the downlink signals of the optimal LTE channel frequency band into the multi-frequency downlink amplifier, inputting the uplink signals of the optimal LTE channel frequency band into the N multiplied by N MIMO external antenna, and outputting the uplink signals by the N multiplied by N MIMO external antenna;
the multi-band downlink amplifier is configured to amplify the downlink signal of the optimal LTE channel band according to a dynamically adjusted amplification gain according to a control instruction of the control circuit, and input the amplified downlink signal into the output radio frequency front-end circuit;
the output radio frequency front-end circuit is used for filtering signals except the optimal LTE channel frequency band in uplink signals and downlink signals according to a control instruction of the control circuit, inputting the uplink signals of the optimal LTE channel frequency band into the multi-frequency band uplink amplifier, inputting the downlink signals of the optimal LTE channel frequency band into the N multiplied by N type MIMO internal antenna, and outputting the signals by the N multiplied by N type MIMO internal antenna;
the multi-band uplink amplifier is configured to amplify the uplink signal of the optimal LTE channel band according to a dynamically adjusted amplification gain according to a control instruction of the control circuit, and input the amplified uplink signal into the input radio frequency front-end circuit.
3. The intelligent repeater station of claim 2, wherein the radio frequency front end circuit, the input radio frequency front end circuit, and the output radio frequency front end circuit all comprise: the RF switch, the duplexer and the filter are connected in sequence.
4. A communication method based on the intelligent repeater station of any one of claims 1-3, said method comprising:
the radio frequency coupler receives downlink signals sent by the base station in real time by utilizing an N multiplied by N MIMO external antenna and divides the downlink signals into 2 paths, wherein 1 path of downlink signals are input into the control circuit, and the other 1 path of downlink signals are input into the direct-amplifying circuit connected with the direct-amplifying circuit;
the control circuit detects and screens out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusts amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sends a control instruction to the N paths of direct-current discharge circuits in real time;
and the N paths of direct-discharge circuits filter out signals except the signals of the optimal LTE channel frequency band in downlink signals and uplink signals according to the control instruction of the control circuit, amplify the signals of the optimal LTE channel frequency band according to the dynamically adjusted amplification gain and output the amplified signals, wherein the uplink signals are communication signals which are received by utilizing the N multiplied by N type MIMO internal antenna and are sent to a base station by a user wireless terminal.
5. The communication method as claimed in claim 4, wherein the filtering, by the N-way direct-current circuit, the signals except the signal of the optimal LTE channel band in the downlink signal according to the control instruction of the control circuit, and amplifying the signal of the optimal LTE channel band according to the dynamically adjusted amplification gain, and then outputting the amplified signal, includes:
an input radio frequency front-end circuit in the N paths of direct-amplifying circuits filters signals except the signal of the optimal LTE channel frequency band in downlink signals according to a control instruction of the control circuit, and inputs the downlink signals of the optimal LTE channel frequency band into the multi-band downlink amplifier;
the multi-band downlink amplifier amplifies the downlink signal of the optimal LTE channel frequency band according to a control instruction of the control circuit and the dynamically adjusted amplification gain, and inputs the amplified downlink signal into the output radio frequency front-end circuit;
and the output radio frequency front-end circuit filters signals except the optimal LTE channel frequency band in downlink signals according to a control instruction of the control circuit, inputs the downlink signals of the optimal LTE channel frequency band into the N multiplied by N MIMO internal antenna, and outputs the signals by the N multiplied by N MIMO internal antenna.
6. The communication method according to claim 5, wherein the N-channel direct-current circuit filters signals except the signal of the optimal LTE channel band in the uplink signal according to the control instruction of the control circuit, amplifies the signal of the optimal LTE channel band according to the dynamically adjusted amplification gain, and outputs the amplified signal, and further comprising:
the output radio frequency front-end circuit in the N paths of direct amplifying circuits filters signals except the signal of the optimal LTE channel frequency band in the uplink signals according to the control instruction of the control circuit, and inputs the uplink signals of the optimal LTE channel frequency band into the multi-band uplink amplifier;
the multi-band uplink amplifier amplifies the uplink signal of the optimal LTE channel band according to a control instruction of the control circuit and the dynamically adjusted amplification gain, and inputs the amplified uplink signal into the input radio frequency front-end circuit;
and the input radio frequency front-end circuit filters out signals except the optimal LTE channel frequency band in uplink signals according to a control instruction of the control circuit, inputs the uplink signals of the optimal LTE channel frequency band into the N multiplied by N MIMO external antenna, and outputs the uplink signals by the N multiplied by N MIMO external antenna.
7. The communication method as claimed in claim 4, wherein the control circuit detects and screens out the optimal LTE channel band in the downlink signal in real time according to a rule preset by clients, dynamically adjusts the amplification gain according to the signal strength of the optimal LTE channel band, and sends out a control command to the N-channel direct-discharge circuit in real time, and the method comprises:
the radio frequency front-end circuit in the control circuit filters downlink signals outside a customized preset frequency band according to the instruction of the LTE baseband processing unit and provides the filtered downlink signals for the radio frequency modem;
the radio frequency modem in the control circuit demodulates the downlink signal and outputs the demodulated downlink signal to the LTE baseband processing unit;
and an LTE baseband processing unit in the control circuit receives the downlink signal in real time, detects and screens out the optimal LTE channel frequency band in the downlink signal in real time according to a preset rule capable of being customized, dynamically adjusts amplification gain according to the signal intensity of the optimal LTE channel frequency band, and sends a control instruction to the N paths of direct-current discharge circuits in real time.
8. The communication method of claim 6, wherein the radio frequency front-end circuit, the input radio frequency front-end circuit, and the output radio frequency front-end circuit all comprise: the RF switch, the duplexer and the filter are connected in sequence.
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| CN108736953B (en) * | 2018-04-10 | 2022-05-06 | 京信网络系统股份有限公司 | Wireless repeater sharing method, device, system and computer equipment |
| CN110138434A (en) * | 2019-06-04 | 2019-08-16 | 深圳市豪位科技有限公司 | The working frequency points adaptive optimization method of NB-IOT wireless discharging-directly station |
| CN111769864B (en) * | 2020-07-21 | 2022-02-15 | 展讯通信（上海）有限公司 | Relay amplification method and system for wireless signal, and storage medium |
| CN114598372A (en) * | 2020-11-19 | 2022-06-07 | 中国移动通信有限公司研究院 | Relay device and method |
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