Indoor distribution system, near-end machine and far-end machine

Abstract

The invention discloses an indoor distribution system, a near-end machine and a far-end machine. The near-end machine is used for determining a first effective working frequency band of the first network type base station based on the received radio frequency signal of the first network type base station and determining a second effective working frequency band of the second network type base station based on the received radio frequency signal of the second network type base station; carrying out fusion processing on the radio frequency signal of the first effective working frequency band and the radio frequency signal of the second effective working frequency band, and sending the fused signal to the far-end machine through an optical fiber; and the far-end machine is used for receiving and processing the fused signal through each effective working frequency band and then transmitting the signal to an indoor area through a radio frequency feeder line.

Description

Technical Field

[0001] The present application relates to the field of indoor distributed communication technology, and in particular to an indoor distributed system and a near-end unit and a far-end unit. Background Art

[0002] Mobile communication technology has evolved from 1G to the large-scale application of 4G, and has rapidly developed to the gradual popularization of 5G, and the subsequent 5.5G & 6G, which has led to the explosive growth of broadband data services such as mobile Internet and Internet of Things. Indoors are the main area where data services occur, and it is particularly urgent to achieve high-quality indoor signal coverage. However, due to the coexistence of existing multi-band and multi-standard signals, such as 2G, 3G, 4G and 5G, it brings great challenges to traditional indoor signal coverage and optimization.

[0003] At present, indoor distribution systems usually adopt the BBU+RRU solution. The BBU (baseband processing unit) and RRU (radio remote unit, i.e. near-end and far-end) are transmitted through optical fiber, and the baseband digital signal is transmitted between BBU and RRU. To cover the RF signal of the working frequency band of a base station to the indoor area, an RRU needs to be configured accordingly. For indoor coverage of RF signals of different working frequency bands of different operators, multiple RRUs need to be configured accordingly.

[0004] One BBU can support multiple RRUs. RRUs centrally place large-capacity macrocell base stations in available central computer rooms, centrally process the baseband part, and use optical fiber to pull the RF module in the base station to the remote RF unit, which is placed at the site determined by the network planning, thus saving a large number of computer rooms required for conventional solutions; at the same time, by using large-capacity macro base stations to support a large number of optical fiber extensions, the conversion between capacity and coverage can be achieved. However, RRUs only support single frequency and cannot meet the needs of multiple frequencies. In order to achieve multi-frequency coverage, multiple RRUs need to be set up, which takes up a lot of space, consumes a lot of power, and is costly.

[0005] In addition, the above solution also requires the operator to provide the information source of the RRU. Often due to network planning reasons, the operator is unable to provide the information source. This has brought certain difficulties to the implementation of the project and affected the promotion and application of the product. Summary of the invention

[0006] The purpose of the embodiments of the present application is to provide an indoor distribution system and a near-end machine and a far-end machine, so as to solve the problems of high cost and small application scope when the existing indoor distribution system meets multi-frequency coverage.

[0007] In order to solve the above technical problems, this specification is implemented as follows: In a first aspect, an indoor distribution system is provided, comprising a near-end unit and a far-end unit. The near-end machine determines a first effective working frequency band of the first network standard base station based on the received radio frequency signal of the first network standard base station and determines a second effective working frequency band of the second network standard base station based on the received radio frequency signal of the second network standard base station; fuses the radio frequency signal of the first effective working frequency band and the radio frequency signal of the second effective working frequency band and sends them to the far-end machine through an optical fiber; The remote device is used to receive and process the fused signal through each effective working frequency band and then transmit it to the indoor area through the radio frequency feeder.

[0008] Optionally, the proximal machine includes: a first signal conversion module, configured to convert a radio frequency signal of a first target frequency band in a radio frequency signal transmitted by the first network standard base station into a digital signal, and to convert a radio frequency signal of a second target frequency band in a radio frequency signal transmitted by the second network standard base station into a digital signal; A first signal processing module, connected to the first signal conversion module, is used to determine the power of the radio frequency signal of the first target frequency band and the power of the radio frequency signal of the second target frequency band based on the corresponding digital signal, and determine the first target frequency band with a power greater than a first preset power threshold as the first effective working frequency band of the first network standard base station, and determine the second target frequency band with a power greater than a second preset power threshold as the second effective working frequency band of the second network standard base station; fuse the digital signal corresponding to the radio frequency signal of the first effective working frequency band and the second effective working frequency band and the information of the first effective working frequency band and the second effective working frequency band to obtain the fused signal; The electro-optical conversion module is connected to the first signal processing module and is used to convert the fused signal into an optical signal and send it to the remote machine through the optical fiber.

[0009] Optionally, a network standard of the first network standard base station is different from a network standard of the second network standard base station, the first target frequency band is different from the second target frequency band, and the first signal conversion module includes: a first filter, configured to filter a first target frequency band in the radio frequency signal transmitted by the base station of the first network standard, so as to allow the radio frequency signal of the first target frequency band to pass; a second filter, configured to filter a second target frequency band in the radio frequency signal transmitted by the base station of the second network standard, so as to allow the radio frequency signal in the second target frequency band to pass; A first radio frequency transceiver, connected to the first filter, and configured to convert the radio frequency signal of the first target frequency band into a first digital signal; a second radio frequency transceiver, connected to the second filter, and configured to convert the radio frequency signal of the second target frequency band into a second digital signal; a first transceiver, disposed between the first filter and the first RF transceiver, configured to amplify the RF signal of the first target frequency band output by the first filter to a first preset power and then provide the amplified power to the first RF transceiver; The second transceiver is arranged between the second filter and the second RF transceiver, and is used for amplifying the RF signal of the second target frequency band output by the second filter to a second preset power and providing the amplified power to the first RF transceiver.

[0010] Optionally, the network standard of the first network standard base station is the same as the network standard of the second network standard base station, the first target frequency band is the same as the second target frequency band, and the first signal conversion module includes: a first filter, configured to filter a first target frequency band or a second target frequency band in radio frequency signals respectively transmitted by the first network standard base station and the second network standard base station, so as to allow radio frequency signals in the first target frequency band or the second target frequency band to pass; A first radio frequency transceiver, connected to the first filter, and configured to convert a radio frequency signal in the first target frequency band or the second target frequency band into a first digital signal; The first transceiver is arranged between the first filter and the first RF transceiver, and is used for amplifying the RF signal of the first target frequency band output by the first filter to a first preset power and providing the amplified power to the first RF transceiver.

[0011] Optionally, the first signal processing module obtains the fused signal, specifically including: Performing filtering processing on the digital signal converted corresponding to the radio frequency signal based on the first effective working frequency band and the digital signal converted corresponding to the radio frequency signal based on the second effective working frequency band respectively; Carrier synthesis of each digital signal after filtering; The carrier-synthesized digital signal is fused with the information of the first effective working frequency band and the information of the second effective working frequency band to obtain the fused signal.

[0012] Optionally, the first signal processing module is further used to: If the power of the radio frequency signal in the first target frequency band is not greater than the first preset power threshold, control the first filter to filter the third target frequency band in the radio frequency signal transmitted by the base station of the corresponding network standard, and control the first radio frequency transceiver to convert the radio frequency signal in the third target frequency band into a third digital signal; Determining the power of the radio frequency signal in the third target frequency band based on the third digital signal; Determine the third target frequency band having a power greater than the first preset power threshold as a valid working frequency band of a base station of a corresponding network standard; The third target frequency band is different from the first target frequency band.

[0013] Optionally, the first filter comprises: a first sub-filter and a second sub-filter, which are applied one by one to filter the first target frequency band and the third target frequency band; The first RF transceiver is a multi-channel RF transceiver, including multiple channels connected to the first sub-filter and the second sub-filter in a one-to-one correspondence, and is used to use the corresponding channels to receive the filtered RF signal of the first target frequency band and convert it into the first digital signal, and to receive the filtered RF signal of the third target frequency band and convert it into the third digital signal.

[0014] Optionally, the proximal machine further includes: A switching switch, a first end of which is connected to the RF signal input end of the proximal machine, and a second end of which is connected to the first sub-filter or the second sub-filter, for providing the RF signal of the target network standard base station received through the RF signal input end of the proximal machine to the first sub-filter or to the second sub-filter; The first signal processing module is further used for: If the power of the radio frequency signal in the first target frequency band is not greater than the first preset power threshold, the second end of the switch is controlled to be connected to the second sub-filter so that the second sub-filter filters the third target frequency band.

[0015] Optionally, the remote machine includes: An optoelectronic conversion module, connected to the optical fiber, and used to convert the fused signal sent by the optical fiber into a digital signal; A second signal processing module is connected to the photoelectric conversion module and is used to obtain corresponding digital signals, information about the first effective working frequency band, and information about the second effective working frequency band by analyzing the fused signal; The second signal conversion module is connected to the second signal processing module, and is used to convert each digital signal into a radio frequency signal of the first effective working frequency band and a radio frequency signal of the second effective working frequency band respectively.

[0016] Optionally, when the network standard of the first network standard base station is different from the network standard of the second network standard base station and the first target frequency band is different from the second target frequency band, the second signal conversion module includes: A third radio frequency transceiver, connected to the second signal processing module, and configured to convert the corresponding digital signal into a radio frequency signal in the first effective working frequency band; a fourth radio frequency transceiver, connected to the second signal processing module, and configured to convert the corresponding digital signal into a radio frequency signal in the second effective working frequency band; a first power amplifier, connected to the third RF transceiver, and configured to amplify the power of the RF signal in the first effective working frequency band; a second power amplifier, connected to the fourth RF transceiver, and configured to amplify the power of the RF signal in the second effective working frequency band; The remote machine also includes: A multi-band combiner is connected to the first power amplifier and the second power amplifier respectively, and is used to combine the radio frequency signal of the first effective working frequency band and the radio frequency signal of the second effective working frequency band output by the first power amplifier and the second power amplifier, and transmit them to the indoor area via a single radio frequency feeder.

[0017] Optionally, when the network standard of the first network standard base station is the same as the network standard of the second network standard base station and the first target frequency band is the same as the second target frequency band, the second signal conversion module includes: A third RF transceiver, connected to the second signal processing module, and configured to convert the corresponding digital signal into a RF signal of the first effective working frequency band and a RF signal of the second effective working frequency band; The first power amplifier is connected to the third RF transceiver and is used to amplify the power of the RF signal in the first effective working frequency band.

[0018] Optionally, the third radio frequency transceiver is a multi-channel radio frequency transceiver, including a plurality of channels corresponding to different effective working frequency bands, each channel is used to receive a digital signal corresponding to the effective working frequency band and convert it into a radio frequency signal; The second signal processing module is further used for: Determining whether the first valid working frequency band obtained by analysis is a preset frequency band; If yes, the channel of the third radio frequency transceiver corresponding to the first effective working frequency band is opened, and the channel not corresponding to the first effective working frequency band is closed.

[0019] In a second aspect, a near-end machine is provided, comprising: a first signal conversion module, configured to convert a radio frequency signal of a first target frequency band in a radio frequency signal transmitted by a base station of a first network standard into a digital signal, and to convert a radio frequency signal of a second target frequency band in a radio frequency signal transmitted by a base station of a second network standard into a digital signal; A first signal processing module, connected to the first signal conversion module, is used to determine the power of the radio frequency signal of the first target frequency band and the power of the radio frequency signal of the second target frequency band based on the corresponding digital signal, and determine the first target frequency band with a power greater than a first preset power threshold as the first effective working frequency band of the first network standard base station, and determine the second target frequency band with a power greater than a second preset power threshold as the second effective working frequency band of the second network standard base station; fuse the digital signal corresponding to the radio frequency signal of the first effective working frequency band and the second effective working frequency band and the information of the first effective working frequency band and the second effective working frequency band to obtain a fused signal; The electro-optical conversion module is connected to the first signal processing module and is used to convert the fused signal into an optical signal and send it to a remote machine through an optical fiber.

[0020] In a third aspect, a remote device is provided, comprising: An optoelectronic conversion module, connected to the first end of the optical fiber, is used to convert the fused signal sent by the optical fiber into a digital signal, wherein the fused signal is obtained by fusing various radio frequency signals corresponding to effective working frequency bands of base stations of different network standards based on a proximal machine connected to the second end of the optical fiber; A second signal processing module is connected to the photoelectric conversion module and is used to obtain digital signals corresponding to radio frequency signals of effective working frequency bands of base stations of different network standards by analyzing the fused signal; The second signal conversion module is connected to the second signal processing module and is used to convert each digital signal into a radio frequency signal of a corresponding effective working frequency band.

[0021] In an embodiment of the present application, an indoor distribution system includes a proximal machine and a distal machine, wherein the proximal machine determines a first effective working frequency band of a base station of a first network standard based on a received radio frequency signal of the base station of the first network standard, and determines a second effective working frequency band of a base station of the second network standard based on a received radio frequency signal of the base station of the second network standard; the radio frequency signal of the first effective working frequency band and the radio frequency signal of the second effective working frequency band are fused and processed and sent to the distal machine via optical fiber; the distal machine is used to receive and process the fused signal through each effective working frequency band and then transmit it to an indoor area via a radio frequency feeder, thereby configuring a set of proximal machines and distal machines for multiple frequency bands of different operators and different network standards, fusing the effective working frequency bands of multiple base stations, and achieving indoor coverage of high-power radio frequency signals of the effective working frequency bands of multiple base stations of different operators, thereby providing a low-cost, high-quality and widely applicable indoor distribution system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic diagram of an application scenario of the indoor distribution system of an embodiment of the present application.

[0023] Figure 2 It is a structural block diagram of a specific example of a proximal machine of the indoor distribution system of an embodiment of the present application.

[0024] Figure 3 This is one of the working principle flow charts of the proximal machine of the indoor distribution system of the embodiment of the present application.

[0025] Figure 4 This is the second flowchart of the working principle of the proximal machine of the indoor distribution system of the embodiment of the present application.

[0026] Figure 5 It is a structural block diagram of a specific example of a remote unit of the indoor distribution system of an embodiment of the present application.

[0027] Figure 6 It is a flow chart of the working principle of the remote unit of the indoor distribution system of the embodiment of the present application.

[0028] Figure 7 This is a flow chart of effective frequency band selection for the indoor distribution system of an embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. The figure numbers in this application are only used to distinguish the various steps in the scheme, and are not used to limit the execution order of the various steps. The specific execution order is subject to the description in the specification.

[0030] In order to solve the problems existing in the prior art, the embodiment of the present application provides an indoor distribution system and a near-end machine and a far-end machine.

[0031] Figure 1 is a schematic diagram of an application scenario of the indoor distribution system of an embodiment of the present application, such as Figure 1 As shown, the indoor distribution system includes a near-end unit 1000 and a far-end unit 2000.

[0032] The near-end machine 1000 determines the first effective working frequency band of the first network standard base station based on the received RF signal of the first network standard base station and determines the second effective working frequency band of the second network standard base station based on the received RF signal of the second network standard base station; and fuses the RF signal of the first effective working frequency band and the RF signal of the second effective working frequency band and sends them to the far-end machine 2000 through the optical fiber 500.

[0033] The remote device 2000 is used to receive and process the fused signal through each effective working frequency band and then transmit it to the indoor area through the radio frequency feeder 600.

[0034] The proximal machine 1000 can simultaneously receive the radio frequency signal of the first network standard base station and the radio frequency signal of the second network standard base station, and the types of network standards include 2G, 3G, 4G and 5G, as well as 5.5G, 6G, etc. that may appear in subsequent development. The first network standard base station and the second network standard base station are different base stations, and the network standards corresponding to the first network standard base station and the second network standard base station may be different or the same. The proximal machine 1000 of the embodiment of the present application can receive and process radio frequency signals transmitted by base stations of various network standards. A base station usually only supports one valid working frequency band that can work normally. For example, a 4G base station supports transmitting radio frequency signals for normal operation in the 1800MHz frequency band, and another 4G base station supports transmitting radio frequency signals for normal operation in the 2100MHz frequency band. Alternatively, a 5G base station supports transmitting radio frequency signals for normal operation in the 2600MHz frequency band, and another 5G base station supports transmitting radio frequency signals for normal operation in the 3500MHz frequency band.

[0035] The same near-end machine 1000 can determine the effective working frequency band supported by each base station for normal operation based on the received RF signals corresponding to the transmission of multiple base stations when the operator does not provide the signal source of the RRU. The received RF signals of the effective working frequency bands of each base station are fused and processed, and then sent to the remote machine 2000 through the optical fiber 500. The near-end machine 1000 of the embodiment of the present application can support multiple effective working frequency bands of different network standards of different operators.

[0036] The same remote machine 2000 can receive the signal after fusion processing by the near-end machine 1000, and after processing based on the fusion processed signal, obtain the corresponding RF signal of the effective working frequency band of each base station, and transmit it to each indoor antenna 700 in the indoor area through the RF feeder 700, thereby completing the coverage of the RF signal of the effective working frequency band of each base station in the indoor area.

[0037] The near-end machine 1000 and the far-end machine 2000 are connected via a digital optical fiber 500 for signal transmission. The far-end machine 2000 receives the effective working frequency band information from the near-end machine 1000 and sets the far-end machine 2000 to work in the corresponding frequency band. The output power of each frequency band is, for example, not less than 43dBm, and each frequency band is single-transmit and single-receive (1T1R).

[0038] by Figure 1 For example, the near-end machine 1000 receives the RF signal transmitted by the first network standard base station 320 through the RF feeder 420 and the outdoor antenna, and receives the RF signal transmitted by the second network standard base station 340 through the RF feeder 440 and the outdoor antenna. Then, the first effective working frequency band of the first network standard base station 320 is determined based on the received RF signal of the first network standard base station 320, and the second effective working frequency band of the second network standard base station 340 is determined based on the received RF signal of the second network standard base station 340, and the RF signal of the first effective working frequency band and the RF signal of the second effective working frequency band are fused and processed, and then sent to the remote machine 2000 through the optical fiber 500.

[0039] The remote machine 2000 receives the fused signal transmitted by the optical fiber 500, and based on the effective working frequency bands corresponding to the fused signal, processes the RF signal of the first effective working frequency band and the RF signal of the second effective working frequency band, and then transmits them to the indoor antennas 700 in the indoor area through the RF feeder 600, so as to achieve the coverage of the RF signal transmitted by the first network standard base station 320 and the RF signal transmitted by the second network standard base station 340 in the indoor area.

[0040] The indoor antenna 700 is a broadband antenna and needs to support different effective operating frequencies of each base station at the same time. For example, it needs to support at least the 1700MHz-3600MHz operating frequency band, and can simultaneously support the four frequency bands of 1800MHz, 2100MHz, 2600MHz, and 3500MHz.

[0041] In an embodiment of the present application, a set of near-end and far-end machines can be configured for the multiple frequency bands of different operators and different network standards, integrating the effective working frequency bands of multiple base stations to achieve indoor coverage of high-power RF signals in the effective working frequency bands of multiple base stations of different operators, thereby providing a low-cost, high-quality and widely applicable indoor distribution system.

[0042] Combination Figure 2Specifically, the near-end machine 1000 includes: a first signal conversion module, which is used to convert the radio frequency signal of the first target frequency band in the radio frequency signal transmitted by the first network standard base station into a digital signal, and convert the radio frequency signal of the second target frequency band in the radio frequency signal transmitted by the second network standard base station into a digital signal; a first signal processing module 1200, which is connected to the first signal conversion module, is used to determine the power of the radio frequency signal of the first target frequency band and the power of the radio frequency signal of the second target frequency band based on the corresponding digital signal, and determine the first target frequency band with a power greater than a first preset power threshold as the first effective working frequency band of the first network standard base station, and determine the second target frequency band with a power greater than a second preset power threshold as the second effective working frequency band of the second network standard base station; the digital signal corresponding to the radio frequency signal of the first effective working frequency band and the second effective working frequency band and the information of the first effective working frequency band and the second effective working frequency band are fused to obtain the fused signal; an electro-optical conversion module 1400, which is connected to the first signal processing module 1200, is used to convert the fused signal into an optical signal and send it to the remote machine 2000 through the optical fiber 500.

[0043] The near-end machine 1000 receives the RF signal of the base station through the RF feeder. The received RF signal includes RF signals of the full frequency band, but the RF signals of some frequency bands are not the frequency bands that can support the normal operation of the corresponding base station. Therefore, it is necessary to first determine the effective working frequency band of the corresponding base station based on the received full-frequency band RF signals. For example, the first network standard base station is a 4G base station supporting the 1800MHz frequency band, and the RF signal received by the near-end machine is a full-frequency band RF signal. It is necessary to determine the effective working frequency band of the first network standard base station from the full-frequency band RF signal.

[0044] The power of the RF signal of the effective working frequency band transmitted by the base station will exceed the preset power threshold, that is, the RF signal of the effective working frequency band is relatively strong. If the power of the RF signal of a certain frequency band does not exceed the preset power threshold, that is, the RF signal of the frequency band is relatively weak, then the frequency band cannot be the effective working frequency band for the normal operation of the base station.

[0045] When determining the effective working frequency band of a base station, it is necessary to filter the RF signals based on the effective working frequency bands that the base station may support. For example, the effective working frequency bands of different network standards of different operators are usually 1800MHz, 2100MHz, 2600MHz, and 3500MHz, of which 1800MHz and 2100MHz are 4G bands, and 2600MHz and 3500MHz are 5G bands.

[0046] The specific selection of which frequency band commonly used by the operator as the target frequency band for determining the effective working frequency band of the base station can be determined according to a pre-configuration.

[0047] If the network standard of the first network standard base station is different from the network standard of the second network standard base station, the first target frequency band selected for determining the effective working frequency band of the first network standard base station must be different from the second target frequency band selected for determining the effective working frequency band of the second network standard base station. For example, if the first network standard base station is 4G and the second network standard base station is 5G, the first target frequency band used to determine the effective working frequency band of the first network standard base station is one of 1800MHz and 2100MHz, and the second target frequency band used to determine the effective working frequency band of the second network standard base station is one of 2600MHz and 3500MHz.

[0048] If the network standard of the first network standard base station is the same as the network standard of the second network standard base station, the first target frequency band selected for determining the effective working frequency band of the first network standard base station must be the same as the second target frequency band selected for determining the effective working frequency band of the second network standard base station. For example, if the first network standard base station and the second network standard base station are both 4G, the first target frequency band used to determine the effective working frequency band of the first network standard base station and the second target frequency band used to determine the effective working frequency band of the second network standard base station are the same, which is one of 1800MHz and 2100MHz.

[0049] The first signal conversion module first converts the radio frequency signal of the first target frequency band in the radio frequency signal transmitted by the first network standard base station into a digital signal, and converts the radio frequency signal of the second target frequency band in the radio frequency signal transmitted by the second network standard base station into a digital signal. The first target frequency band and the second target frequency band are one of the effective working frequency bands commonly used by the operator, for example, the first target frequency band is the 1800 MHz frequency band, and the second target frequency band is the 2600 MHz frequency band.

[0050] The first signal processing module further counts the power of the RF signals corresponding to the first target frequency band and the second target frequency band according to the digital signals converted from the RF signals of the first target frequency band and the second target frequency band, and determines whether the first target frequency band is the first valid working frequency band of the first network standard base station according to the power, and determines whether the second target frequency band is the second valid working frequency band of the second network standard base station.

[0051] For example, for example, the first network standard base station is 4G, and the second network standard base station is 5G. The first target frequency band used to determine the effective working frequency band of the first network standard base station is 1800MHz, and the second target frequency band used to determine the effective working frequency band of the second network standard base station is 2600MHz. If the first signal processing module determines that the power is less than the first preset power threshold based on the power of the digital signal corresponding to the 1800MHz radio frequency signal, it is considered that the 1800MHz frequency band is not a valid working frequency band that supports the normal operation of the first network standard base station. If the first signal processing module determines that the power is not less than the first preset power threshold based on the power of the digital signal corresponding to the 1800MHz radio frequency signal, it is considered that the 1800MHz frequency band is a valid working frequency band that supports the normal operation of the first network standard base station.

[0052] Similarly, it can also be determined whether the frequency band of 2600 MHz is a valid working frequency band that supports normal operation of the base station of the second network standard.

[0053] If it is determined that the first target frequency band can be the first effective working frequency band of the first network standard base station, and the second target frequency band is determined to be the second effective working frequency band of the second network standard base station, the first signal conversion module 1200 further fuses the digital signal corresponding to the converted radio frequency signals of the first effective working frequency band and the second effective working frequency band and the information of the first effective working frequency band and the second effective working frequency band to obtain a fused signal. And further combined with the electro-optical conversion module 1400, the fused signal is converted into an optical signal and sent to the remote machine 500 through the optical fiber 500.

[0054] The first signal processing module 1200 may be implemented by a digital signal processor (DSP) or a field programmable gate array (FPGA). The electro-optical conversion module 1400 may be implemented by a common digital optical module, with a rate of, for example, 10 Gbps.

[0055] The specific structure of the first signal conversion module is described below in conjunction with different embodiments.

[0056] In one embodiment, the network standard of the first network standard base station is different from that of the second network standard base station, and the first target frequency band is different from the second target frequency band. The first signal conversion module includes: a first filter, used to filter the first target frequency band in the radio frequency signal transmitted by the first network standard base station so that the radio frequency signal of the first target frequency band passes; a second filter, used to filter the second target frequency band in the radio frequency signal transmitted by the second network standard base station so that the radio frequency signal of the second target frequency band passes; a first radio frequency transceiver, connected to the first filter, used to convert the radio frequency signal of the first target frequency band into a first digital signal; a second radio frequency transceiver, connected to the second filter, used to convert the radio frequency signal of the second target frequency band into a second digital signal; a first transceiver, arranged between the first filter and the first radio frequency transceiver, used to amplify the radio frequency signal of the first target frequency band output by the first filter to a first preset power and provide it to the first radio frequency transceiver; a second transceiver, arranged between the second filter and the second radio frequency transceiver, used to amplify the radio frequency signal of the second target frequency band output by the second filter to a second preset power and provide it to the first radio frequency transceiver.

[0057] For base stations with different network standards, the first target frequency band and the second target frequency band are different, and the near-end machine supports processing different frequency bands of different network standards. Correspondingly, different filters are required to filter the full-band RF signal transmitted by the base station in the first target frequency band and the second target frequency band.

[0058] Combination Figure 2 For example, the first network standard base station is a 4G base station, the second network standard base station is a 5G base station, the frequency band of the 4G base station supported by the proximal machine is 1800MHz / 2100MHz, and the frequency band of the 5G base station supported by the proximal machine is 2600MHz / 3500MHz. The selected first target frequency band is, for example, 1800MHz, and the second target frequency band is, for example, 2600MHz.

[0059] The first filter is Figure 2 The 1800 MHz duplexer is used to filter the 1800 MHz frequency band of the radio frequency signal transmitted by the first network standard base station so that the radio frequency signal in the 1800 MHz frequency band passes. The second filter is Figure 2 The 2600 MHz filter is used to filter the 2600 MHz frequency band in the radio frequency signal transmitted by the second network standard base station to allow the radio frequency signal in the 2600 MHz frequency band to pass.

[0060] The first RF transceiver is Figure 2The dual-channel RF transceiver 1 is used to convert the RF signal in the 1800 MHz frequency band into a first digital signal; the second RF transceiver is Figure 2 The dual-channel radio frequency transceiver 2 is used to convert the radio frequency signal in the 2600 MHz frequency band into a second digital signal.

[0061] The first transceiver is Figure 2 The 1800 MHz transceiver module is arranged between the 1800 MHz duplexer and the dual-channel RF transceiver 1, and is used to amplify the RF signal of the 1800 MHz frequency band output by the 1800 MHz duplexer to a first preset power and provide it to the dual-channel RF transceiver 1; the second transceiver is Figure 2 The 2600 MHz transceiver module is arranged between the 2600 MHz filter and the dual-channel RF transceiver 2, and is used to amplify the RF signal of the 2600 MHz frequency band output by the 2600 MHz filter to a second preset power and provide it to the dual-channel RF transceiver 2. In order to ensure the signal quality, for example, the preset power of 4G is ≥-50dBm, corresponding to RSRP (reference signal received power) ≥-80dBm; the preset power of 5G is ≥-50dBm, corresponding to RSRP (reference signal received power) ≥-85dBm.

[0062] In another embodiment, the network standard of the first network standard base station is the same as the network standard of the second network standard base station, the first target frequency band is the same as the second target frequency band, and the first signal conversion module includes: a first filter, used to filter the first target frequency band or the second target frequency band in the radio frequency signals respectively transmitted by the first network standard base station and the second network standard base station, so that the radio frequency signal of the first target frequency band or the second target frequency band passes; a first radio frequency transceiver, connected to the first filter, used to convert the radio frequency signal of the first target frequency band or the second target frequency band into a first digital signal; a first transceiver, arranged between the first filter and the first radio frequency transceiver, used to amplify the radio frequency signal of the first target frequency band output by the first filter to a first preset power, and then provide it to the first radio frequency transceiver.

[0063] For base stations with the same network standard, the first target frequency band and the second target frequency band selected are the same, and the near-end machine supports processing the same frequency band of the same network standard. Correspondingly, the same filter needs to be used to filter the full-band RF signal transmitted by the base station in the first target frequency band or the second target frequency band.

[0064] Combination Figure 2For example, the first network standard base station is a 4G base station, the second network standard base station is a 4G base station, the frequency band of the 4G base station supported by the proximal machine is 1800MHz / 2100MHz, and the selected first target frequency band and second target frequency band are, for example, 1800MHz.

[0065] The first filter is Figure 2 The 1800 MHz duplexer is used to simultaneously filter the 1800 MHz frequency band in the radio frequency signals respectively transmitted by the first network standard base station and the second network standard base station, so as to allow the radio frequency signals in the 1800 MHz frequency band to pass.

[0066] The first RF transceiver is Figure 2 The dual-channel radio frequency transceiver 1 is used to convert the radio frequency signal in the 1800 MHz frequency band into a first digital signal. The first transceiver is Figure 2 The 1800 MHz transceiver module is arranged between the 1800 MHz duplexer and the dual-channel RF transceiver 1, and is used to amplify the RF signal of the 1800 MHz frequency band output by the 1800 MHz duplexer to a first preset power and then provide it to the dual-channel RF transceiver 1. To ensure the signal quality, for example, the preset power of 4G is ≥-50dBm, corresponding to RSRP (reference signal received power) ≥-80dBm.

[0067] For any of the above embodiments, correspondingly, the first signal processing module 1200 obtains the fused signal, specifically including: filtering the digital signal converted corresponding to the radio frequency signal based on the first effective working frequency band, and the digital signal converted corresponding to the radio frequency signal based on the second effective working frequency band, respectively; performing carrier synthesis on each digital signal after filtering; fusing the digital signal after carrier synthesis with the information of the first effective working frequency band and the information of the second effective working frequency band to obtain the fused signal.

[0068] The digital signal corresponding to the first effective working frequency band and the digital signal corresponding to the second effective working frequency band are subjected to carrier synthesis after digital filtering in the first signal processing module 1200. The information of the currently determined first effective working frequency band and the second effective working frequency band are added to the carrier synthesis signal after digital filtering, and the optical fiber protocol data of the common public radio interface (CPRI) is framed to obtain a fused signal.

[0069] As described above, if the power of the radio frequency signal in the first target frequency band is greater than the first preset power threshold, the effective working frequency band of the corresponding base station can be determined.

[0070] In one embodiment, the first signal processing module 1200 is further used to: if the power of the RF signal of the first target frequency band is not greater than the first preset power threshold, control the first filter to filter the third target frequency band in the RF signal transmitted by the corresponding network standard base station, and control the first RF transceiver to convert the RF signal of the third target frequency band into a third digital signal; determine the power of the RF signal of the third target frequency band based on the third digital signal; determine the third target frequency band whose power is greater than the first preset power threshold as the effective working frequency band of the corresponding network standard base station; wherein the third target frequency band is different from the first target frequency band.

[0071] In this embodiment, if the power of the radio frequency signal of the first target frequency band is not greater than the first preset power threshold, it means that the selected first target frequency band cannot correctly determine the effective working frequency band of the corresponding base station, and then other frequency bands different from the first target frequency band under the network standard corresponding to the base station can be selected as the target frequency band for determining the effective working frequency band of the base station. Similarly, the first signal processing module 1200 is also applicable to the case where the power of the radio frequency signal of the second target frequency band is not greater than the second preset power threshold.

[0072] For example, for base stations of different network standards, the selected first target frequency band and second target frequency band are different, and the first target frequency band is, for example, 1800 MHz, the second target frequency band is, for example, 2600 MHz, and the third target frequency band is, for example, 2100 MHz.

[0073] If the power of the radio frequency signal in the first target frequency band is not greater than the first preset power threshold, the first signal processing module 1200 controls the duplexer 1800 to filter the 2100MHz frequency band in the radio frequency signal transmitted by the first network standard base station, and controls the dual-channel radio frequency transceiver 1 to convert the radio frequency signal in the 2100MHz frequency band into a third digital signal. And based on the power of the radio frequency signal determined by the third digital signal, if it is determined that the power is greater than the first preset power threshold, the 2100MHz frequency band is determined as the effective working frequency band of the first network standard base station.

[0074] For example, for base stations with the same network standard, the selected first target frequency band and the second target frequency band are the same, and the first target frequency band and the second target frequency band are, for example, 1800 MHz, and the third target frequency band is, for example, 2100 MHz.

[0075] If the power of the RF signal in the first target frequency band is not greater than the first preset power threshold, the first signal processing module 1200 controls the duplexer 1800 to filter the 2100MHz frequency band in the RF signals transmitted by the first network standard base station and the second network standard base station, and controls the dual-channel RF transceiver 1 to convert the RF signal in the 2100MHz frequency band into a third digital signal. And based on the power of the RF signal determined by the third digital signal, if it is determined that the power is greater than the first preset power threshold, the 2100MHz frequency band is determined as the effective working frequency band of the first network standard base station and the second network standard base station.

[0076] Similarly, the above processing method of the first signal processing module 1200 is also applicable to the case where the power of the radio frequency signal in the second target frequency band is not greater than the second preset power threshold.

[0077] In the case where the proximal machine supports different effective working frequency bands of the same network standard, different filters need to be used to process the RF signals of the corresponding effective working frequency bands respectively.

[0078] In one embodiment, the first filter includes: a first sub-filter and a second sub-filter, which are used one by one to filter the first target frequency band and the third target frequency band; the first RF transceiver is a multi-channel RF transceiver, including a plurality of channels connected to the first sub-filter and the second sub-filter in a one-to-one correspondence, and is used to use corresponding channels to receive the filtered RF signal of the first target frequency band and convert it into the first digital signal, and receive the filtered RF signal of the third target frequency band and convert it into the third digital signal.

[0079] Taking the above-mentioned proximal machine 1000 supporting effective operating frequencies of 4G as 1800MHz and 2100MHz as an example, when determining the effective operating frequency of 4G based on the first target frequency band and the third target frequency band, the first target frequency band of 1800MHz is filtered by the first sub-filter, and the third target frequency band of 2100MHz is filtered by the second sub-filter.

[0080] Combination Figure 2 , the first sub-filter is Figure 2 The second sub-filter of the 1800MHz duplexer is Figure 2 2100MHz duplexer.

[0081] Correspondingly, the multi-channel radio frequency transceiver of the first radio frequency transceiver is Figure 2 The dual-channel RF transceiver 1 includes two channels connected to the 1800 MHz duplexer and the 2100 MHz duplexer in a one-to-one correspondence, and is used to receive and convert the filtered RF signal into a corresponding digital signal using independent channels.

[0082] To achieve the switching of the above-mentioned third target frequency band, correspondingly, the proximal machine also includes: a switching switch, a first end of which is connected to the RF signal input end of the proximal machine, and a second end of which is connected to the first sub-filter or the second sub-filter, and is used to provide the RF signal of the target network standard base station received through the RF signal input end of the proximal machine to the first sub-filter or to the second sub-filter.

[0083] The first signal processing module is also used to: if the power of the RF signal in the first target frequency band is not greater than the first preset power threshold, control the second end of the switching switch to be connected to the second sub-filter so that the second sub-filter filters the third target frequency band.

[0084] Continuing with the example that the first target frequency band is 1800MHz and the third target frequency band is 2100MHz, combined with Figure 2 A switching switch 1 is provided between the RF signal input end of the proximal machine and the 1800 MHz duplexer and the 2100 MHz duplexer. The first end of the switching switch 1 is connected to the RF signal input end of the proximal machine, and the second end can be connected to the 1800 MHz duplexer or the 2100 MHz duplexer, and is used to provide the RF signal of the corresponding network standard base station received through the RF signal input end of the proximal machine to the 1800 MHz duplexer or the 2100 MHz duplexer.

[0085] Whether the second end of the switch 1 is connected to the 1800 MHz duplexer or the 2100 MHz duplexer is controlled by the first signal processing module 1200. In a default state, the second end of the switch 1 is connected to the 1800 MHz duplexer so that the 1800 MHz duplexer filters the 1800 MHz frequency band.

[0086] If the first signal processing module 1200 determines that the power of the RF signal in the first target frequency band of 1800 MHz is not greater than the first preset power threshold, the second end of the switch 1 is controlled to be connected to the 2100 MHz duplexer so that the 2100 MHz duplexer filters the 2100 MHz frequency band.

[0087] Similarly, the above processing method of the first filter is also applicable to the second filter, and the above processing method of the first signal processing module 1200 is also applicable to the switch 2, which will not be repeated here.

[0088] Combine the following Figure 3 to Figure 4, the working principles of the proximal units of the indoor distribution system are described respectively. It is assumed that the first group of outdoor base stations are 4G base stations, and the effective working frequency bands supported by the proximal units are 1800MHz / 2100MHz; the second group of outdoor base stations are 5G base stations, and the effective working frequency bands supported by the proximal units are 2600MHz / 35100MHz. The structure of the proximal units is Figure 2 .

[0089] For the RF signals of the first group of outdoor base stations, such as Figure 3 As shown, the following steps are included: Step 102, placing an outdoor antenna in a certain orientation, and receiving radio frequency signals of a first group of outdoor base stations through a radio frequency feeder; Step 104, switch 1 is placed to the 1800 MHz RF channel; Step 106, the adaptive frequency selection digital signal processing unit (i.e. Figure 2 The first signal processing module 1200) configures the dual-channel transceiver 1 to work at a frequency band of 1800 MHz; Step 108, determine whether the power of the filtered 1800 MHz radio frequency signal is greater than the power setting threshold (i.e., the first preset power threshold)? If so, proceed to step 110, otherwise proceed to step 112; Step 110, the first effective working frequency band is 1800 MHz; Step 112, switch 1 is placed to the 2100 MHz RF channel; Step 114, the adaptive frequency selection digital signal processing unit configures the dual-channel transceiver 1 to work at a frequency band of 2100 MHz; Step 116, determine whether the power of the filtered 2100 MHz radio frequency signal is greater than the power setting threshold? If so, proceed to step 118, otherwise proceed to step 102; Step 118, the first effective working frequency band is 2100 MHz.

[0090] Thus, the effective operating frequency band of the radio frequency signal of the first group of outdoor base stations when working normally can be determined.

[0091] After passing through the switching switch 1, the RF signal received by the near-end machine enters the RF channel 1 composed of a 1800MHz duplexer and a 1800MHz transceiver module or the RF channel 2 composed of a 2100MHz duplexer and a 2100MHz transceiver module. After filtering the signals of other frequency bands and amplifying the signals of its own frequency band, it enters the dual-channel RF transceiver 1, becomes a high-speed serial digital signal, and enters the first signal processing module 1200.

[0092] The hardware design of the two channels of the dual-channel RF transceiver 1 matches 1800MHz and 2100MHz respectively. The 1800MHz duplexer and the 2100MHz duplexer can be dielectric duplexers, the 1800MHz transceiver module and the 2100MHz transceiver module include a low noise amplifier and a medium power amplifier, and the switch 1 is a single-pole double-throw, and the power level is ≥30dBm.

[0093] For the RF signals of the second group of outdoor base stations, such as Figure 4 As shown, the following steps are included: Step 202, placing an outdoor antenna in a certain orientation, and receiving radio frequency signals of a second group of outdoor base stations through a radio frequency feeder; Step 204, switch 2 is placed to the 2600 MHz RF channel; Step 206, the adaptive frequency selection digital signal processing unit (ie Figure 2 The first signal processing module 1200) configures the dual-channel transceiver 2 to work at a frequency band of 2600 MHz; Step 108, determine whether the power of the filtered 2600 MHz radio frequency signal is greater than the power setting threshold (i.e., the second preset power threshold)? If so, proceed to step 210, otherwise proceed to step 212; Step 210, the second effective operating frequency band is 2600 MHz; Step 212, switch 2 is placed to the 3500 MHz RF channel; Step 214, the adaptive frequency selection digital signal processing unit configures the dual-channel transceiver 2 to work at a frequency band of 3500 MHz; Step 216, determine whether the power of the filtered 3500 MHz radio frequency signal is greater than the power setting threshold? If so, proceed to step 218, otherwise proceed to step 202; Step 218: the second effective operating frequency band is 3500 MHz.

[0094] Thus, the effective operating frequency band of the radio frequency signal of the second group of outdoor base stations when working normally can be determined.

[0095] The 2600 / 3500MHz RF signal, after passing through the switching switch 2, enters the RF channel 1 composed of a 2600MHz filter and a 2600MHz transceiver module or the RF channel 2 composed of a 3500MHz filter and a 3500MHz transceiver module, and after filtering other frequency band signals and amplifying its own frequency band signals, enters the dual-channel RF transceiver 2, becomes a high-speed serial digital signal, and enters the first signal processing module 1200.

[0096] The hardware design of the two channels of the dual-channel RF transceiver 2 matches 2600MHz and 3500MHz respectively. The 2600MHz filter and 3500MHz filter are dielectric filters, the 2600MHz and 3500MHz transceiver modules include low noise amplifiers and medium power amplifiers, and the switch 2 is a single-pole double-throw with a power level ≥33dBm.

[0097] Specifically, for the remote machine, combined with Figure 5 The remote device 2000 includes: an optoelectronic conversion module 2400, connected to the optical fiber 500, and used to convert the fused signal sent by the optical fiber 500 into a digital signal; a second signal processing module 2200, connected to the optoelectronic conversion module 2400, and used to obtain corresponding digital signals, information of the first effective working frequency band, and information of the second effective working frequency band by analyzing the fused signal; a second signal conversion module, connected to the second signal processing module 2200, and used to convert each digital signal into a radio frequency signal of the first effective working frequency band and a radio frequency signal of the second effective working frequency band, respectively.

[0098] The optoelectronic conversion module 2400 can be a common digital optical module, with a rate of, for example, 10 Gbps, and is used to convert the fused signal sent by the optical fiber 500 into a corresponding digital signal.

[0099] The fused signal entering the remote machine 2000 through the optical fiber 500 includes the first and second effective working frequency band information and the carrier synthesis signal, which is converted into a digital signal by the photoelectric conversion module 2400 and then enters the second signal processing module 2200. The second signal processing module 2200 obtains the carrier synthesis signal and the information of the first effective working frequency band and the second effective working frequency band after deframing based on the CPRI protocol data, and then separates the carrier synthesis signal to extract the digital signal corresponding to the radio frequency signal of the first effective working frequency band and the digital signal corresponding to the radio frequency signal of the second effective working frequency band.

[0100] The digital signal of the first effective working frequency band and the digital signal of the second effective working frequency band enter the second signal conversion module, and the second signal conversion module converts each digital signal into the original RF signal of the first effective working frequency band and the RF signal of the second effective working frequency band respectively.

[0101] When the network standard of the first network standard base station is different from the network standard of the second network standard base station and the first target frequency band is different from the second target frequency band, the second signal conversion module includes: a third RF transceiver, connected to the second signal processing module, for converting the corresponding digital signal into a RF signal of the first effective working frequency band; a fourth RF transceiver, connected to the second signal processing module, for converting the corresponding digital signal into a RF signal of the second effective working frequency band; a first power amplifier, connected to the third RF transceiver, for amplifying the power of the RF signal of the first effective working frequency band; and a second power amplifier, connected to the fourth RF transceiver, for amplifying the power of the RF signal of the second effective working frequency band.

[0102] The remote device also includes: a multi-band combiner, which is connected to the first power amplifier and the second power amplifier respectively, and is used to combine the radio frequency signals of the first effective working frequency band and the radio frequency signals of the second effective working frequency band output by the first power amplifier and the second power amplifier, and transmit them to the indoor area via a single radio frequency feeder.

[0103] like Figure 5 As shown, the third RF transceiver is a dual-channel RF transceiver 3, and the fourth RF transceiver is a dual-channel RF transceiver 4. The third RF transceiver and the fourth RF transceiver are respectively used to process different effective working frequency bands of base stations of different network standards.

[0104] The digital signal of the first effective working frequency band and the digital signal of the second effective working frequency band enter the dual-channel RF transceiver 3 and the dual-channel RF transceiver 4 respectively, and become low-power RF signals, and then pass through the power amplifier of the channel corresponding to the effective working frequency band to become a high-power RF signal, such as a 1800MHz power amplifier, a 2100MHz power amplifier, a 2600MHz power amplifier or a 3500MHz power amplifier. The digital signal of the first effective working frequency band of 1800MHz enters the 1800MHz power amplifier, and the digital signal of the first effective working frequency band of 2100MHz enters the 2100MHz power amplifier.

[0105] For radio frequency signals of base stations of different network standards, it is necessary to combine the frequency bands using a multi-band combiner 2600 and transmit them to the indoor area via a single radio frequency feeder 600.

[0106] When the network standard of the first network standard base station is the same as the network standard of the second network standard base station and the first target frequency band is the same as the second target frequency band, the second signal conversion module includes: a third RF transceiver, connected to the second signal processing module, and used to convert the corresponding digital signal into a RF signal of the first effective working frequency band and a RF signal of the second effective working frequency band.

[0107] For the same effective working frequency band of the base station of the same network standard, it can be processed by the same RF transceiver, such as Figure 5 The dual-channel RF transceiver 3 shown can simultaneously process RF signals of the 1800MHz frequency band transmitted by different 4G base stations. Digital signals with the same effective working frequency band from different 4G base stations enter the dual-channel RF transceiver 3 at the same time, become low-power RF signals, and then pass through the power amplifier of the channel corresponding to the effective working frequency band to become high-power RF signals. For example, a digital signal with the first and second effective working frequency bands of 1800MHz enters the 1800MHz power amplifier, and a digital signal with the first and second effective working frequency bands of 2100MHz enters the 2100MHz power amplifier.

[0108] For the RF signals of base stations of the same network standard, there is no need to combine the multi-band combiner 2600 for frequency band combining. After the power amplifier of the corresponding effective working frequency band outputs, it is directly transmitted to the indoor area through a single RF feeder 600.

[0109] In one embodiment, the third RF transceiver is a multi-channel RF transceiver, including multiple channels corresponding to different effective working frequency bands, each channel is used to receive a digital signal corresponding to the effective working frequency band and convert it into a RF signal; the second signal processing module is also used to: determine whether the first effective working frequency band obtained by analysis is a preset frequency band; if so, open the channel of the third RF transceiver corresponding to the first effective working frequency band, and close the channel not corresponding to the first effective working frequency band.

[0110] Combination Figure 5 The third RF transceiver is a dual-channel RF transceiver 3, including channel 1 and channel 2, wherein channel 1 receives a digital signal in an effective working frequency band of 1800 MHz and converts it into a RF signal, and then outputs it to a 1800 MHz power amplifier. Channel 2 receives a digital signal in an effective working frequency band of 2100 MHz and converts it into a RF signal, and then outputs it to a 2100 MHz power amplifier.

[0111] The dual-channel RF transceiver 3 only supports one valid working frequency band at the same time. After analyzing the fused signal, the second signal processing module 2200 determines whether the corresponding first valid working frequency band is a preset frequency band, and the preset frequency band is, for example, 1800 MHz.

[0112] If yes, the second signal processing module 2200 opens the channel of the dual-channel RF transceiver 3 corresponding to the effective working frequency band of 1800 MHz, and closes the channel not corresponding to the effective working frequency band of 1800 MHz, for example, the channel of 2100 MHz.

[0113] Similarly, the dual-channel RF transceiver 4 only supports one valid working frequency band at the same time. After analyzing the fused signal, the second signal processing module 2200 determines whether the corresponding second valid working frequency band is a preset frequency band, such as 2600 MHz.

[0114] If yes, the second signal processing module 2200 opens the channel of the dual-channel RF transceiver 4 corresponding to the effective working frequency band of 2600 MHz, and closes the channel not corresponding to the effective working frequency band of 2600 MHz, for example, the channel of 3500 MHz.

[0115] The remote device 2000 also includes a low noise amplifier, which is used for the mobile phone in the indoor area to transmit signals back to the outdoor base station. The low noise amplifier can include, for example, an 1800MHz low noise amplifier, a 2100MHz low noise amplifier, a 2600MHz low noise amplifier or a 3500MHz low noise amplifier, and is used in groups with a power amplifier of the corresponding effective working frequency band.

[0116] Combine the following Figure 6 , the working principle of the remote unit of the indoor distribution system is described, assuming that the effective working frequency band supported by the remote unit is 1800MHz / 2100MHz / 2600MHz / 35100MHz, and the structure of the remote unit is Figure 5 .

[0117] like Figure 6 As shown, the following steps are included: Step 302: a multi-frequency digital signal processing unit (i.e. Figure 5 The second signal processing module 2200) deframes the data information of the signal after the fusion processing to obtain the first effective working frequency band information and the digital signal, the second effective working frequency band information and the digital signal; Step 304, determining whether the first effective operating frequency is 1800 MHz, if so, proceeding to step 308, otherwise proceeding to step 310; Step 306, determining whether the second effective operating frequency is 2600 MHz, if so, proceeding to step 312, otherwise proceeding to step 314; Step 308, setting the dual-channel RF transceiver 3 to 1800 MHz, and turning off the 2100 MHz power amplifier and the 2100 MHz low noise amplifier; Step 310, setting the dual-channel RF transceiver 3 to 2100 MHz, and turning off the 1800 MHz power amplifier and the 1800 MHz low noise amplifier; Step 312, setting the dual-channel RF transceiver 4 to 2600 MHz, and turning off the 3500 MHz power amplifier and the 3500 MHz low noise amplifier; Step 314, setting the dual-channel RF transceiver 4 to 3500 MHz, and turning off the 2600 MHz power amplifier and the 2600 MHz low noise amplifier.

[0118] The digital signal of the first effective working frequency band and the digital signal of the second effective working frequency band enter the dual-channel RF transceiver 3 and the dual-channel RF transceiver 4 respectively, and are converted into low-power RF signals of analog signals, and then pass through the power amplifiers of the corresponding channels, such as 1800MHz power amplifier, 2100MHz power amplifier, 2600MHz power amplifier, and 3500MHz power amplifier, to be converted into high-power RF signals required for the covered indoor area. The 1800MHz low noise amplifier, 2100MHz low noise amplifier, 2600MHz low noise amplifier, and 3500MHz low noise amplifier are used for reverse reception signals.

[0119] For example, the output power of the power amplifier of each frequency band is ≥44dBm, the hardware design of the two channels of the dual-channel RF transceiver 3 is matched at 1800MHz and 2100MHz respectively, and the hardware design of the two channels of the dual-channel RF transceiver 4 is matched at 2600MHz and 3500MHz respectively. The control algorithm of the dual-channel RF transceiver 3 and the dual-channel RF transceiver 4, the power amplifier of each frequency band and the low noise amplifier is completed by the second signal processing module 2200.

[0120] In the embodiment of the present application, the effective working frequency band supported by the indoor distribution system is taken as 1800MHz / 2100MHz / 2600MHz / 35100MHz as an example, but it is not limited to the above specific embodiment. It can support more effective working frequencies currently or developed in the future based on different network standards and frequency bands of different operators. The working principle is the same and will not be repeated here.

[0121] In order to better achieve simultaneous coverage of multiple operators' signals, Figure 7An embodiment of the effective frequency band selection method of the indoor distribution system of the embodiment of the present application is given. In this embodiment, the indoor distribution system simultaneously receives the radio frequency signals of the effective working frequency bands of 1800MHz / 2100MHz / 2600MHz / 35100MHz transmitted by 4G and 5G base stations as an example.

[0122] like Figure 7 As shown, the following steps are included: Step 402, the adaptive frequency selection near-end machine (i.e., the near-end machine 1000) determines a first effective working frequency band and a second effective working frequency band; Step 404, determine whether the second effective working frequency band is 3500 MHz? If yes, proceed to step 406, otherwise proceed to step 408; Step 406, setting the first effective working frequency band to 1800 MHz; Step 408, determine whether the first valid working frequency band is 2100 MHz? If so, proceed to step 410, otherwise proceed to step 412; Step 410, setting the first effective working frequency band to 2100 MHz; Step 412, setting the first effective working frequency band to 1800 MHz.

[0123] Here, through the above-mentioned method of selecting effective working frequency bands, more effective working frequency bands of more operators can be covered to a greater extent, the cost and applicability of the indoor distribution system can be improved, and the minimum number of working frequency bands that can meet the scene application requirements can be automatically configured for high-power signal coverage.

[0124] The following describes a specific example of the overall workflow of the indoor distribution system. For example, the 1800 / 2100MHz frequency band signal transmitted by a base station enters the near-end machine after being received by the outdoor antenna. After the adaptive frequency selection algorithm is passed internally, an effective working frequency band in the 1800MHz or 2100MHz frequency band is determined. The 2600 / 3500MHz frequency band signal transmitted by another base station enters the near-end machine after being received by the outdoor antenna. After the adaptive frequency selection algorithm is passed internally, an effective working frequency band in the 2600MHz or 3500MHz frequency band is determined. The near-end machine processes the signals of the two effective working frequency bands, merges the determined frequency band information, and transmits it to the remote machine through optical fiber. The remote machine sets the corresponding effective working frequency band based on the obtained frequency band information and turns off other frequency bands at the same time. After the RF signal of the effective working frequency band is synthesized in the multi-band combiner, it is transmitted to the indoor area through the RF feeder, and then the multi-band 4G or 5G signal of the effective working frequency band is transmitted to the area to be covered through the indoor antenna connected to the RF feeder. At the same time, after the reverse signal is received by the indoor antenna, it is transmitted back to the external base station through the above reverse process, thereby completing the two-way communication process between the outdoor base station and the indoor coverage area.

[0125] In an embodiment of the present application, an indoor distribution system includes a proximal machine and a distal machine, wherein the proximal machine determines a first effective working frequency band of a base station of a first network standard based on a received radio frequency signal of the base station of the first network standard, and determines a second effective working frequency band of a base station of the second network standard based on a received radio frequency signal of the base station of the second network standard; the radio frequency signal of the first effective working frequency band and the radio frequency signal of the second effective working frequency band are fused and processed and sent to the distal machine via optical fiber; the distal machine is used to receive and process the fused signal through each effective working frequency band and then transmit it to an indoor area via a radio frequency feeder, thereby configuring a set of proximal machines and distal machines for multiple frequency bands of different operators and different network standards, fusing the effective working frequency bands of multiple base stations, and achieving indoor coverage of high-power radio frequency signals of the effective working frequency bands of multiple base stations of different operators, thereby providing a low-cost, high-quality and widely applicable indoor distribution system.

[0126] Optionally, the embodiment of the present application further provides a proximal machine, including: A first signal conversion module, used to convert a radio frequency signal of a first target frequency band in a radio frequency signal transmitted by a base station of a first network standard into a digital signal, and to convert a radio frequency signal of a second target frequency band in a radio frequency signal transmitted by a base station of a second network standard into a digital signal; A first signal processing module, connected to the first signal conversion module, is used to determine the power of the radio frequency signal of the first target frequency band and the power of the radio frequency signal of the second target frequency band based on the corresponding digital signal, and determine the first target frequency band with a power greater than a first preset power threshold as the first effective working frequency band of the first network standard base station, and determine the second target frequency band with a power greater than a second preset power threshold as the second effective working frequency band of the second network standard base station; fuse the digital signal corresponding to the radio frequency signal of the first effective working frequency band and the second effective working frequency band and the information of the first effective working frequency band and the second effective working frequency band to obtain a fused signal; The electro-optical conversion module is connected to the first signal processing module and is used to convert the fused signal into an optical signal and send it to a remote machine through an optical fiber.

[0127] The near-end machine provided in the embodiments of this specification can achieve Figures 1 to 4 To avoid repetition, the various processes implemented by the proximal machine 1000 in the embodiment will not be described again here.

[0128] Optionally, the embodiment of the present application further provides a remote machine, including: An optoelectronic conversion module, connected to the first end of the optical fiber, is used to convert the fused signal sent by the optical fiber into a digital signal, wherein the fused signal is obtained by fusing various radio frequency signals corresponding to effective working frequency bands of base stations of different network standards based on a proximal machine connected to the second end of the optical fiber; A second signal processing module is connected to the photoelectric conversion module and is used to obtain digital signals corresponding to radio frequency signals of effective working frequency bands of base stations of different network standards by analyzing the fused signal; The second signal conversion module is connected to the second signal processing module and is used to convert each digital signal into a radio frequency signal of a corresponding effective working frequency band.

[0129] The remote machine provided in the embodiments of this specification can realize Figure 5 to Figure 6 To avoid repetition, the various processes implemented by the remote machine 2000 in the embodiment will not be described again here.

[0130] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0131] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0132] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An indoor distribution system, characterized in that: Including near-end and far-end machines, The near-end machine determines a first effective working frequency band of the first network standard base station based on the received radio frequency signal of the first network standard base station and determines a second effective working frequency band of the second network standard base station based on the received radio frequency signal of the second network standard base station; fuses the radio frequency signal of the first effective working frequency band and the radio frequency signal of the second effective working frequency band and sends them to the far-end machine through an optical fiber; The remote device is used to receive and process the fused signal through each effective working frequency band and then transmit it to the indoor area through the radio frequency feeder.

2. The system according to claim 1, characterized in that The near-end machine comprises: a first signal conversion module, configured to convert a radio frequency signal of a first target frequency band in a radio frequency signal transmitted by the first network standard base station into a digital signal, and to convert a radio frequency signal of a second target frequency band in a radio frequency signal transmitted by the second network standard base station into a digital signal; A first signal processing module, connected to the first signal conversion module, is used to determine the power of the radio frequency signal of the first target frequency band and the power of the radio frequency signal of the second target frequency band based on the corresponding digital signal, and determine the first target frequency band with a power greater than a first preset power threshold as the first effective working frequency band of the first network standard base station, and determine the second target frequency band with a power greater than a second preset power threshold as the second effective working frequency band of the second network standard base station; fuse the digital signal corresponding to the radio frequency signal of the first effective working frequency band and the second effective working frequency band and the information of the first effective working frequency band and the second effective working frequency band to obtain the fused signal; The electro-optical conversion module is connected to the first signal processing module and is used to convert the fused signal into an optical signal and send it to the remote machine through the optical fiber.

3. The system according to claim 2, characterized in that The network standard of the first network standard base station is different from the network standard of the second network standard base station, the first target frequency band is different from the second target frequency band, and the first signal conversion module includes: a first filter, configured to filter a first target frequency band in the radio frequency signal transmitted by the base station of the first network standard, so as to allow the radio frequency signal of the first target frequency band to pass; a second filter, configured to filter a second target frequency band in the radio frequency signal transmitted by the base station of the second network standard, so as to allow the radio frequency signal in the second target frequency band to pass; A first radio frequency transceiver, connected to the first filter, and configured to convert the radio frequency signal of the first target frequency band into a first digital signal; a second radio frequency transceiver, connected to the second filter, and configured to convert the radio frequency signal of the second target frequency band into a second digital signal; a first transceiver, disposed between the first filter and the first RF transceiver, configured to amplify the RF signal of the first target frequency band output by the first filter to a first preset power and then provide the amplified power to the first RF transceiver; The second transceiver is arranged between the second filter and the second RF transceiver, and is used for amplifying the RF signal of the second target frequency band output by the second filter to a second preset power and providing the amplified power to the first RF transceiver.

4. The system according to claim 2, characterized in that The network standard of the first network standard base station is the same as the network standard of the second network standard base station, the first target frequency band is the same as the second target frequency band, and the first signal conversion module includes: a first filter, configured to filter a first target frequency band or a second target frequency band in radio frequency signals respectively transmitted by the first network standard base station and the second network standard base station, so as to allow radio frequency signals in the first target frequency band or the second target frequency band to pass; A first radio frequency transceiver, connected to the first filter, and configured to convert a radio frequency signal in the first target frequency band or the second target frequency band into a first digital signal; The first transceiver is arranged between the first filter and the first RF transceiver, and is used for amplifying the RF signal of the first target frequency band output by the first filter to a first preset power and providing the amplified power to the first RF transceiver.

5. The system according to claim 3 or 4, characterized in that: The first signal processing module obtains the fused signal, specifically including: Performing filtering processing on the digital signal converted corresponding to the radio frequency signal based on the first effective working frequency band and the digital signal converted corresponding to the radio frequency signal based on the second effective working frequency band respectively; Carrier synthesis of each digital signal after filtering; The carrier-synthesized digital signal is fused with the information of the first effective working frequency band and the information of the second effective working frequency band to obtain the fused signal.

6. The system according to claim 5, characterized in that The first signal processing module is further used for: If the power of the radio frequency signal in the first target frequency band is not greater than the first preset power threshold, control the first filter to filter the third target frequency band in the radio frequency signal transmitted by the base station of the corresponding network standard, and control the first radio frequency transceiver to convert the radio frequency signal in the third target frequency band into a third digital signal; Determining the power of the radio frequency signal in the third target frequency band based on the third digital signal; Determine the third target frequency band having a power greater than the first preset power threshold as a valid working frequency band of a base station of a corresponding network standard; The third target frequency band is different from the first target frequency band.

7. The system according to claim 6, characterized in that The first filter includes: a first sub-filter and a second sub-filter, which are applied one by one to filter the first target frequency band and the third target frequency band; The first RF transceiver is a multi-channel RF transceiver, including multiple channels connected to the first sub-filter and the second sub-filter in a one-to-one correspondence, and is used to use the corresponding channels to receive the filtered RF signal of the first target frequency band and convert it into the first digital signal, and to receive the filtered RF signal of the third target frequency band and convert it into the third digital signal.

8. The system according to claim 7, characterized in that The near-end machine also includes: A switching switch, a first end of which is connected to the RF signal input end of the proximal machine, and a second end of which is connected to the first sub-filter or the second sub-filter, for providing the RF signal of the target network standard base station received through the RF signal input end of the proximal machine to the first sub-filter or to the second sub-filter; The first signal processing module is further used for: If the power of the radio frequency signal in the first target frequency band is not greater than the first preset power threshold, the second end of the switch is controlled to be connected to the second sub-filter so that the second sub-filter filters the third target frequency band.

9. The system according to claim 5, characterized in that The remote machine comprises: An optoelectronic conversion module, connected to the optical fiber, and used to convert the fused signal sent by the optical fiber into a digital signal; A second signal processing module is connected to the photoelectric conversion module and is used to obtain corresponding digital signals, information about the first effective working frequency band, and information about the second effective working frequency band by analyzing the fused signal; The second signal conversion module is connected to the second signal processing module, and is used to convert each digital signal into a radio frequency signal of the first effective working frequency band and a radio frequency signal of the second effective working frequency band respectively.

10. The system according to claim 9, characterized in that In the case where the network standard of the first network standard base station is different from the network standard of the second network standard base station and the first target frequency band is different from the second target frequency band, the second signal conversion module includes: A third radio frequency transceiver, connected to the second signal processing module, and configured to convert the corresponding digital signal into a radio frequency signal in the first effective working frequency band; a fourth radio frequency transceiver, connected to the second signal processing module, and configured to convert the corresponding digital signal into a radio frequency signal in the second effective working frequency band; a first power amplifier, connected to the third RF transceiver, and configured to amplify the power of the RF signal in the first effective working frequency band; a second power amplifier, connected to the fourth RF transceiver, and configured to amplify the power of the RF signal in the second effective working frequency band; The remote machine also includes: A multi-band combiner is connected to the first power amplifier and the second power amplifier respectively, and is used to combine the radio frequency signal of the first effective working frequency band and the radio frequency signal of the second effective working frequency band output by the first power amplifier and the second power amplifier, and transmit them to the indoor area via a single radio frequency feeder.

11. The system according to claim 9, characterized in that In the case where the network standard of the first network standard base station is the same as the network standard of the second network standard base station and the first target frequency band is the same as the second target frequency band, the second signal conversion module includes: A third RF transceiver, connected to the second signal processing module, and configured to convert the corresponding digital signal into a RF signal of the first effective working frequency band and a RF signal of the second effective working frequency band; The first power amplifier is connected to the third RF transceiver and is used to amplify the power of the RF signal in the first effective working frequency band.

12. The system according to claim 10 or 11, characterized in that The third radio frequency transceiver is a multi-channel radio frequency transceiver, including a plurality of channels corresponding to different effective working frequency bands, each channel is used to receive a digital signal corresponding to the effective working frequency band and convert it into a radio frequency signal; The second signal processing module is further used for: Determining whether the first valid working frequency band obtained by analysis is a preset frequency band; If yes, the channel of the third radio frequency transceiver corresponding to the first effective working frequency band is opened, and the channel not corresponding to the first effective working frequency band is closed.

13. A near-end machine, characterized in that: include: A first signal conversion module, used to convert a radio frequency signal of a first target frequency band in a radio frequency signal transmitted by a base station of a first network standard into a digital signal, and to convert a radio frequency signal of a second target frequency band in a radio frequency signal transmitted by a base station of a second network standard into a digital signal; A first signal processing module, connected to the first signal conversion module, is used to determine the power of the radio frequency signal of the first target frequency band and the power of the radio frequency signal of the second target frequency band based on the corresponding digital signal, and determine the first target frequency band with a power greater than a first preset power threshold as the first effective working frequency band of the first network standard base station, and determine the second target frequency band with a power greater than a second preset power threshold as the second effective working frequency band of the second network standard base station; fuse the digital signal corresponding to the radio frequency signal of the first effective working frequency band and the second effective working frequency band and the information of the first effective working frequency band and the second effective working frequency band to obtain a fused signal; The electro-optical conversion module is connected to the first signal processing module and is used to convert the fused signal into an optical signal and send it to a remote machine through an optical fiber.

14. A remote device, characterized in that: include: an optoelectronic conversion module connected to the first end of the optical fiber, and used for converting the fused signal sent by the optical fiber into a digital signal, wherein the fused signal is obtained by fusing various radio frequency signals corresponding to effective working frequency bands of base stations of different network standards based on a proximal machine connected to the second end of the optical fiber; A second signal processing module is connected to the photoelectric conversion module and is used to obtain digital signals corresponding to radio frequency signals of effective working frequency bands of base stations of different network standards by analyzing the fused signal; The second signal conversion module is connected to the second signal processing module and is used to convert each digital signal into a radio frequency signal of a corresponding effective working frequency band.

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