WO2017049829A1 - 一种多信源接入方法及系统 - Google Patents

一种多信源接入方法及系统 Download PDF

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Publication number
WO2017049829A1
WO2017049829A1 PCT/CN2016/073069 CN2016073069W WO2017049829A1 WO 2017049829 A1 WO2017049829 A1 WO 2017049829A1 CN 2016073069 W CN2016073069 W CN 2016073069W WO 2017049829 A1 WO2017049829 A1 WO 2017049829A1
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source
signal
external source
digital
processing
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PCT/CN2016/073069
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English (en)
French (fr)
Inventor
林洁
陈豪
付灿
李雪林
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中兴通讯股份有限公司
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Publication of WO2017049829A1 publication Critical patent/WO2017049829A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H04W16/20—Network planning tools for indoor coverage or short range network deployment

Definitions

  • the present application relates to the field of mobile communications, for example, to a multi-source access method and system.
  • FIG. 1 is a schematic diagram of a common macro station indoor coverage system provided by the related art.
  • the principle is to use antenna feeder to form an indoor antenna distribution system, that is, The room division system distributes the signals of the mobile base station in every corner of the room, thereby ensuring that the indoor area has an ideal signal coverage.
  • 2 is a schematic diagram of the indoor coverage of the micro-station provided by the related art.
  • the micro-base station mainly adopts a network cable layout, and the macro-station indoor coverage system shown in FIG.
  • the room division system of the device and the coupler reduces the hardware cost.
  • the signal attenuation of the transmission of the optical fiber and the network cable is very small, which greatly reduces the output power requirement of the base station. Therefore, the indoor signal coverage gradually starts to use the micro station.
  • the layout is complete.
  • the conventional method is to add a new type of equipment corresponding to the macro station indoor coverage system shown in FIG. 1 or the micro station macro station indoor as shown in FIG. Cover the system.
  • a set of macro station indoor distribution system includes a plurality of power splitters, couplers and room-divided antenna feeder systems, and multiple sets of macro station indoor distribution systems appear in the access coverage of multi-standard mobile devices. As the coverage increases, the indoor distribution system is repeatedly constructed and the feeder layout is confusing, and the operating costs are multiplied.
  • the existing design method of increasing the corresponding indoor distribution system for the new system mobile signal coverage will cause repeated construction of the indoor distribution system and confusion of the layout of the long-distance antenna feeder system, resulting in a substantial increase in operating costs, the system Planning and design is more difficult.
  • the embodiment of the invention provides a multi-source access method and system, which can better solve the problem that a multi-source signal simultaneously shares a set of indoor coverage systems.
  • a multi-source access method including:
  • the multi-source access unit sequentially performs photoelectric conversion and photoelectric inverse conversion processing on the optical signal of the own source baseband to realize transparent transmission of the optical signal of the own source baseband;
  • the multi-source access unit processes the external source radio frequency signal into an external source digital signal, and performs photoelectric conversion processing on the processed external source digital signal to obtain an external source optical signal;
  • the multi-source access unit transmits the own source baseband optical signal and the external source optical signal to the indoor coverage system through the same optical fiber, so that the indoor coverage system implements a multi-source compatible indoor signal cover.
  • the multi-source access unit processes the external source radio frequency signal into an external source digital signal, which may include:
  • the multi-source access unit accesses an external source radio frequency signal through a radio frequency feeder or an antenna, and transmits the signal through an external source radio frequency module;
  • the indoor signal coverage of the multi-source compatible by the indoor coverage system may include:
  • the indoor coverage system converts the received self-contained baseband optical signal into its own source baseband digital signal, and sequentially converts the converted original source baseband digital signal into digital signal processing and digital-to-analog conversion processing, and The processed signal is transmitted via its own source RF transmission channel;
  • the received external source optical signal is converted into an external source digital signal, and the converted external source digital signal is sequentially subjected to digital signal processing and digital-to-analog conversion processing, and the processed signal is transmitted via an external source RF transmission channel. transmission;
  • the indoor coverage system receives a first indoor mobile user signal (ie, a user signal corresponding to its own source) via its own source radio frequency receiving channel, and sequentially performs frequency conversion, amplification, and filtering on the first indoor mobile user signal.
  • a first indoor mobile user signal ie, a user signal corresponding to its own source
  • the indoor coverage system receives a second indoor mobile user signal (ie, a user signal corresponding to an external source) via an external source radio frequency receiving channel, and sequentially performs frequency conversion, amplification, and filtering on the second indoor mobile user signal.
  • the RF signal processing, the analog-to-digital conversion processing, the digital signal processing, and the photoelectric conversion processing obtain an optical signal corresponding to the external source and send the optical signal to the multi-source access unit.
  • the multi-source access unit sequentially performs photoelectric conversion and photoelectric inverse conversion processing on the optical signal corresponding to the self-owned source, and transmits the processed signal to the own source baseband unit;
  • the multi-source access unit sequentially performs photoelectric conversion processing, digital signal processing, and digital-to-analog conversion processing on the optical signal corresponding to the external source, and sends the processed signal to the external source via the external source RF module.
  • RF remote unit sequentially performs photoelectric conversion processing, digital signal processing, and digital-to-analog conversion processing on the optical signal corresponding to the external source, and sends the processed signal to the external source via the external source RF module.
  • a multi-source access system including:
  • the multi-source access unit is configured to sequentially perform photoelectric conversion and photoelectric inverse conversion processing on the optical signal of the own source baseband, realize transparent transmission of the optical signal of the own source baseband, and process the external source radio frequency signal into an external signal.
  • a source digital signal performing photoelectric conversion processing on the processed external source digital signal to obtain an external source optical signal, and then transmitting the own source baseband optical signal and the external source optical signal through the same optical fiber Giving indoor coverage system;
  • the indoor coverage system is configured to implement multi-source indoor signal coverage by using the self-owned source baseband optical signal and the external source optical signal that are transmitted by the same optical fiber.
  • the multiple source access unit may include:
  • a first photoelectric conversion module configured to convert an own source baseband optical signal into an own source-based charged signal
  • the external source RF module is configured to transmit an external source RF signal accessed through the RF feeder or the antenna;
  • the digital signal processing module is configured to sequentially perform analog-to-digital conversion processing and digital signal processing on the signal transmitted through the external source radio frequency module to obtain an external source digital signal;
  • the second photoelectric conversion module is configured to convert the own source-based charged signal and the external source digital signal into an own source baseband optical signal and an external source optical signal.
  • the indoor coverage system can include:
  • the photoelectric conversion unit is configured to convert the received original source baseband optical signal into an own source baseband digital signal, and convert the received external source optical signal into an external source digital signal;
  • the digital signal processing unit is configured to sequentially perform the digital signal processing and digital-to-analog conversion processing on the converted original source baseband digital signal, and transmit the processed signal through the self-owned source radio frequency transmission channel;
  • the external source digital signal is sequentially subjected to digital signal processing and digital-to-analog conversion processing, and the processed signal is transmitted via an external source RF transmission channel.
  • the digital signal processing unit of the indoor coverage system may be further configured to receive, by the own source radio frequency receiving channel, a first indoor mobile user signal that has undergone radio frequency signal processing including frequency conversion, amplification, filtering, and the received
  • the first indoor mobile user signal performs analog-to-digital conversion processing, digital signal processing, and photoelectric conversion processing to obtain an optical signal corresponding to the own source, and transmits the optical signal to the multi-source access unit.
  • the second photoelectric conversion module of the multi-source access unit may perform photoelectric conversion on the optical signal corresponding to the self-owned source from the indoor coverage system to obtain an electrical signal corresponding to the self-owned source, for providing
  • the first photoelectric conversion module performs photoelectric inverse conversion processing on the electrical signal corresponding to the own source, and transmits the processed signal to the own source baseband unit.
  • the digital signal processing unit of the indoor coverage system may be further configured to receive, by the external source radio frequency receiving channel, a second mobile user signal that has undergone radio frequency signal processing including frequency conversion, amplification, and filtering, and the received second The mobile user signal performs analog-to-digital conversion processing, digital signal processing, and photoelectric conversion processing to obtain an optical signal corresponding to the external source, and transmits the optical signal to the multi-source access unit.
  • the second photoelectric conversion module of the multi-source access unit may perform photoelectric conversion processing on the optical signal corresponding to the external source from the indoor coverage system to obtain an electrical signal corresponding to the external source for the
  • the digital signal processing module performs digital signal processing on the electrical signal corresponding to the external source, and sends the processed signal to the external source radio remote unit via the external source RF module.
  • the embodiment of the present invention can use the RF feeder or the antenna to access the RF signals of other manufacturers and other standard sources, that is, the multi-source signal can be used in the layout of the new standard signal macro station indoor coverage or the micro-station indoor coverage system.
  • the multi-source signal can be used in the layout of the new standard signal macro station indoor coverage or the micro-station indoor coverage system.
  • a set of indoor coverage system is shared, which significantly reduces the construction cost of the indoor coverage system and the difficulty of system planning and design.
  • FIG. 1 is a schematic diagram of a common macro station indoor coverage system provided by the related art
  • FIG. 2 is a schematic diagram of indoor coverage of a micro-station provided by the related art
  • FIG. 3 is a flow chart of signal transmission of a multi-source access method according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of signal reception of a multi-source access method according to an embodiment of the present invention.
  • FIG. 5 is a functional block diagram of a multi-source access unit according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a multi-source access macro station coverage system according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a multi-source access micro-station coverage system according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of signal transmission of a multi-source access method according to an embodiment of the present invention. As shown in FIG. 3, the steps include:
  • Step S101 The multi-source access unit sequentially performs photoelectric conversion and photoelectric inverse conversion processing on the optical signal of the own source baseband to realize transparent transmission of the optical signal of the own source baseband, and at the same time, the multi-source access unit is externally connected.
  • the source RF signal is processed into an external source digital signal, and the processed external digital signal is subjected to photoelectric conversion processing to obtain an external source optical signal.
  • the self-owned source baseband signal is generated by a baseband unit corresponding to its own source, which is usually placed in the communication room.
  • the self-owned source baseband optical signal is subjected to two photoelectric conversions to realize transparent transmission of the self-sourced baseband optical signal in the multi-source access unit, that is, the optical signal is converted into an electrical signal and then converted into an optical signal.
  • the external source RF signal may be an outdoor RF signal wirelessly accessed through an antenna, or an external source RF signal that is wired through the feeder.
  • the external source RF signal is transmitted through the external source RF module of the multi-source access unit, and then the signal transmitted through the external source RF module is sequentially subjected to analog-to-digital conversion processing and digital signal processing to obtain an external source digital signal. signal.
  • the signal processing such as filtering, amplifying, frequency conversion, etc., is performed on the radio frequency signal transmitted by the external source radio frequency module during transmission of the external source radio frequency signal.
  • Step S102 The multi-source access unit transmits the own source baseband optical signal and the external source optical signal to the indoor coverage system by using the same optical fiber, where the indoor coverage system includes a macro station indoor coverage system or Micro-station indoor coverage system for indoor signal coverage compatible with multiple sources.
  • Step S103 The self-owned source baseband optical signal and the external source optical signal that are transmitted by the same optical fiber in the indoor coverage system are processed correspondingly, and the processed signals are respectively transmitted through an own source RF.
  • the channel and the external source RF transmit channel are transmitted. That is, in the indoor signal coverage system, after the corresponding source baseband optical signal is processed correspondingly, the signal transmission is performed by the corresponding own source radio frequency module to realize indoor user signal transmission; After the external source optical signal is processed correspondingly, the signal transmission is performed by the corresponding external source RF module to realize the indoor user signal transmission.
  • the received self-contained baseband optical signal is converted into an own source-based charged signal, and the converted self-generated base-based charged signal is digital-to-analog converted, and
  • the processed signal is transmitted through the self-owned source radio frequency transmitting channel; the received external source optical signal is converted into an external source digital signal, and the converted external source digital signal is sequentially subjected to digital signal processing and digital-to-analog conversion.
  • the transmitted signal is transmitted to achieve indoor signal transmission compatible with multiple sources.
  • the interface conversion module converts the received self-source baseband optical signal into its own source-based charged signal, and transmits it to the micro-station device through the network cable, and converts the obtained self.
  • the signal source-based charged signal is converted into an analog signal after corresponding digital signal processing and digital-to-analog conversion, and is subjected to frequency conversion, amplification, filtering, etc. through the own source RF transmission channel; and the received external source optical signal is converted.
  • the external digital signal is externally connected, and the converted external digital signal is sequentially subjected to digital signal processing and digital-to-analog conversion processing, and the processed signal is externally connected. Transmitting the source RF transmission channel; then transmitting the signal transmitted through the own source RF transmission channel and the signal transmitted via the external source RF transmission channel through the same antenna, thereby implementing multi-source compatible Indoor coverage.
  • FIG. 4 is a flowchart of signal reception of a multi-source access method according to an embodiment of the present invention. As shown in FIG. 4, the steps include:
  • Step S201 The indoor coverage system processes the indoor signal corresponding to the external source received by the external source radio frequency receiving channel and the indoor signal corresponding to the own source received via the own source RF receiving channel as corresponding lights respectively. signal.
  • the indoor coverage system receives an indoor signal corresponding to an external source (ie, a second indoor mobile user signal/a received signal corresponding to an external source) via an external source RF receiving channel, and transmits the external source RF receiving channel and The processed signal is subjected to analog-to-digital conversion and photoelectric conversion processing to obtain an optical signal corresponding to the external source.
  • the indoor coverage system receives the indoor signal corresponding to the own source (ie, the first indoor mobile user signal/the received signal corresponding to the external source) via the own source radio frequency receiving channel, and the self-owned source
  • the signal transmitted and processed by the RF receiving channel is subjected to analog-to-digital conversion and photoelectric conversion processing to obtain an optical signal corresponding to the own source.
  • Step S202 The indoor coverage system transmits the optical signal corresponding to the self-owned source and the external source obtained by the corresponding optical fiber to the multi-source access unit.
  • Step S203 The multi-source access unit performs photoelectric conversion and digital signal processing on the optical signal corresponding to the external source, and sends the processed signal to the external source radio remote unit through the external source RF module.
  • the optical signal corresponding to the self-owned signal is sequentially subjected to photoelectric conversion and photoelectric inverse conversion processing, and the processed signal is sent to the own source baseband unit.
  • the multi-source access unit performs photoelectric conversion and digital signal processing on the optical signal corresponding to the external source, and sends the processed signal to the external source radio remote unit through the external source RF module. At the same time, the multi-source access unit sequentially performs photoelectric conversion and photoelectric inverse conversion processing on the optical signal corresponding to the self-owned source, and transmits the processed signal to the own source baseband unit.
  • the process of receiving and transmitting indoor signals is a reciprocal process.
  • the communication interaction between the base station and the mobile users is realized, thereby completing the indoor signal of the multi-source. cover.
  • FIG. 5 is a functional block diagram of a multi-source access unit according to an embodiment of the present invention, where the multi-source access list is
  • the element performs photoelectric conversion and photoelectric inverse conversion processing on the optical signal of the own source baseband in turn, realizes transparent transmission of the optical signal of the own source baseband, and processes the external source RF signal into an external source digital signal, and processes the obtained signal.
  • the external source digital signal is subjected to photoelectric conversion processing to obtain an external source optical signal, and then the self-owned source baseband optical signal and the external source optical signal are transmitted to the indoor coverage system through the same optical fiber for the
  • the indoor coverage system utilizes the self-owned source baseband optical signal and the external source optical signal transmitted from the same optical fiber to implement indoor signal coverage compatible with multiple sources.
  • the first photoelectric conversion module 10, the external source RF module 21, the digital signal processing module 22, and the second photoelectric conversion module 30 are included. among them:
  • the first photoelectric conversion module 10 converts the self-source baseband optical signal into an own source-based charged signal
  • the external source RF module 21 transmits the external source RF that is accessed through the RF feeder or the antenna.
  • the signal and digital signal processing module 22 sequentially performs analog-to-digital conversion processing and digital signal processing on the signal transmitted through the external source radio frequency module 21 to obtain an external source digital signal
  • the second photoelectric conversion module 30 transmits the self-owned signal.
  • the source base charging signal and the external source digital signal are respectively converted into an own source baseband optical signal and an external source optical signal, and are transmitted to the indoor coverage system by using the same optical fiber.
  • the second photoelectric conversion module 30 photoelectrically converts the optical signal of the corresponding frequency band of the own source from the indoor coverage system to obtain an electrical signal corresponding to the own source
  • the first photoelectric conversion module 10 Performing photoelectric inverse conversion processing on the electrical signal corresponding to the own source, and transmitting the processed signal to the own source baseband unit.
  • the second photoelectric conversion module 30 performs photoelectric conversion processing on the optical signal of the corresponding frequency band of the external source from the indoor coverage system to obtain an electrical signal corresponding to the external source
  • the digital signal processing module 22 corresponds to the external source.
  • the processed signal is sent to the external source radio remote unit via the external source radio frequency module 21.
  • the first photoelectric conversion module 10 converts the self-source baseband optical signal into an own source-based charged signal.
  • the external source RF module 21 accesses the external source RF signal through the RF feeder or the antenna, and transmits the signal through the external source RF transmission channel.
  • the radio frequency signal performs processing including filtering, amplifying, and frequency conversion;
  • the digital signal processing module 22 sequentially performs analog-to-digital conversion processing and digital signal processing on the signal transmitted through the external source radio frequency transmitting channel to obtain an external source.
  • Digital signal, the digital signal processing including shifting Frequency, digital down conversion, noise reduction and other processing.
  • the second photoelectric conversion module 30 converts the self-owned source-based charged signal and the external source digital signal into an own source baseband optical signal and an external source optical signal, and the self-owned signal is transmitted through the same optical fiber.
  • the source baseband optical signal and the external source optical signal are sent to a macro station indoor coverage system or a microstation indoor coverage system.
  • the photoelectric conversion unit of the indoor coverage system converts the received source baseband optical signal into its own source baseband digital signal, and converts the received external source optical signal into an external source digital signal; the indoor coverage system
  • the digital signal processing unit sequentially performs the digital signal processing and the digital-to-analog conversion processing on the converted original source baseband digital signal, and transmits the processed signal through the self-owned source RF transmitting channel, and converts the obtained external source digital signal.
  • the signal is sequentially subjected to digital signal processing and digital-to-analog conversion processing, and the processed signal is transmitted through a corresponding external source RF transmission channel in the overlay system, thereby realizing indoor signal transmission compatible with multiple sources.
  • the indoor coverage system receives the first indoor mobile subscriber signal via the own source radio frequency receiving channel, and performs frequency conversion, amplification, and filtering on the signal during the transmission of the first indoor mobile subscriber signal in the own source radio frequency receiving channel.
  • the signal obtained by the RF signal processing is subjected to analog-to-digital conversion processing and photoelectric conversion processing to obtain an optical signal corresponding to the own source.
  • the indoor coverage system receives the second indoor mobile subscriber signal via the external source radio frequency receiving channel, and transmits the second indoor mobile subscriber signal during the transmission of the second indoor mobile subscriber signal in the external source radio frequency receiving channel.
  • the RF signal processing such as frequency conversion, amplification, filtering, etc.
  • the indoor coverage system transmits the optical signal corresponding to the own source and the optical signal corresponding to the external source to the multi-source access unit via the same optical fiber.
  • the second photoelectric conversion module 30 converts the optical signal corresponding to the received optical signal processed by the macro station indoor coverage system or the micro-station indoor coverage system and the corresponding received optical signal into an independent source corresponding reception.
  • the electrical signal and the external source correspond to the received electrical signal.
  • the first photoelectric conversion module 10 performs electro-optical conversion on the received electrical signal obtained by the second photoelectric conversion module 30 to obtain an optical signal corresponding to the self-owned signal, and sends the obtained optical signal to its own optical signal.
  • the external source RF module 21 and the digital signal processing module 22 perform the digital signal processing including digital up-conversion and frequency shifting on the received external signal corresponding to the received external signal processed by the second photoelectric conversion module 30, and the processed signal is passed through External source RF module transmission During the transmission through the external source RF module, the signal is subjected to digital-to-analog conversion, filtering, amplification, up-conversion, RF filtering, etc., to obtain an RF signal corresponding to the external source, and the obtained RF signal is transmitted. It is processed by the remote radio unit of the external source.
  • the device is equipped with a corresponding power supply system 40, a CPU system (i.e., CPU control system) 50, and a clock system 60 to ensure that the device operates normally.
  • a CPU system i.e., CPU control system
  • a clock system 60 to ensure that the device operates normally.
  • the embodiment of the invention realizes adding a new standard mobile signal coverage while sharing a set of indoor coverage system. It can be used to cover the indoor coverage of the new standard mobile signal macro station, and use the RF feeder to access other sources of RF signals from different manufacturers and different systems for RF transmission, analog-to-digital conversion and digital signal processing, and then photoelectric conversion.
  • the optical signal it enters the radio remote unit through the optical fiber, and transmits the frequency with the original signal radio frequency transceiver, and shares a set of indoor distribution system with the new mobile source to realize multi-standard signal coverage.
  • the embodiment of the invention also realizes adding a new standard mobile signal coverage while sharing a set of indoor coverage system, and the corresponding implementation manner is similar to the multi-source access macro station indoor coverage system,
  • the micro base station uses the multi-source access unit shown in FIG. 5
  • the self-owned source signal is connected to the optical fiber output through the device fiber, and other external signals of different manufacturers and different systems are accessed through the RF feeder, and the antenna can also be used.
  • Wireless access then RF transmission, analog-to-digital conversion, digital signal processing and photoelectric conversion, using optical fiber output, and then converted to network cable transmission through the interface conversion module, enter the micro-station and complete multi-source signal coverage through the micro-station own antenna .
  • the technical solution of the embodiment of the present invention includes:
  • the external source uses RF feeder or antenna access, performs RF signal frequency conversion, analog-to-digital conversion and digital signal processing, and then performs photoelectric conversion, and shares the same optical output with its own signal.
  • the signal passes through the multi-source access unit and enters the macro station radio remote unit through the optical fiber.
  • the macro station radio remote unit not only has the radio frequency transmission module corresponding to its own source signal, but also It has a radio frequency transceiver module corresponding to the external source frequency band, so as to realize communication coverage of the external source signal.
  • the self-owned source and the external source are outputted through the multi-source access unit fiber, and then enter the interface conversion module to be converted into an electrical signal.
  • the network cable outputs and enters the micro-station.
  • the RF unit in the micro-station also needs to design a radio transceiver module corresponding to the external source frequency band to complete the indoor communication coverage of the external source.
  • the external source accessed by the multi-source access unit may be a different source than the self-owned source, or may be a source of output from a base station device of different vendors, and multiple external sources may be accessed by adding multiple sources.
  • the access unit is implemented by the number of external source RF processing modules, and has wide compatibility.
  • the external source can be accessed through the RF feeder or wirelessly using the antenna.
  • the RF signal transmitted by the RF signal is transmitted, and the digital signal is processed after the analog-to-digital conversion. It is converted into an optical signal and output through the optical fiber, and the receiving process of the external source is basically the reverse process of the above-mentioned transmission.
  • FIG. 6 is a schematic diagram of a multi-source access macro station indoor coverage system according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a multi-source access micro-station indoor coverage system according to an embodiment of the present invention.
  • the multi-source access unit and the indoor coverage system are designed for the external hardware and software, so that the external source completes the signal coverage through the multi-source access unit and the shared source indoor coverage system.
  • the indoor distribution system of 2G and 3G macro stations will be added separately. There will be two sets of macro station indoor distribution system and one set of micro station coverage system at the same time, the cost is doubled, and the feeders used in the indoor distribution of the macro station are greatly attenuated. There is a large pressure on the output power of the 2G/3G macro station.
  • the original 2G/3G signal coverage can be introduced by using the multi-source access unit, which does not increase the output power of the original 2G and 3G base stations, nor does it increase the indoor distribution of the macro station.
  • the system realizes cost control through the shared micro-station coverage system and easily completes the layout planning.
  • Multi-source access unit design corresponds to the original 2G/3G signal frequency RF link, using RF
  • the feeder or antenna is wirelessly connected to realize the transmission and reception of the original 2G/3G source RF signal and the multi-source access unit.
  • the accessed 2G/3G radio frequency transmission source enters the RF module corresponding to the original source transmission band of the multi-source access unit, and performs RF filtering, amplification, and down-conversion processing by the external source RF sub-module, and then performs The IF filtering, amplification, and analog-to-digital conversion convert the analog signal into a digital signal and enter the digital signal processing sub-module.
  • the digital signal processing sub-module performs frequency shifting (multi-carrier frequency shifting to zero frequency), digital down conversion (DDC), noise reduction processing, and then through the digital signal outputted by the external source radio frequency sub-module.
  • the second photoelectric conversion module performs photoelectric conversion, and generates an optical signal to transmit the transmission signal of the external source to the interface conversion module of the 4G micro-station system through the optical fiber.
  • the interface conversion module of the micro-station system not only completes the self-contained signal conversion function of the micro-station, but also completes the function of converting the external source optical signal into an electrical signal, so that the signal can be transmitted through the network cable.
  • the external 2G/3G transmission source is processed by the interface conversion module and then enters the 4G micro-station system from the network cable, and the digital signal is digitally up-converted (Digital Up Conversion, DUC) through the digital signal processing module in the micro-station.
  • DUC Digital Up Conversion
  • Frequency shifting moving multiple carriers to the corresponding carrier frequency
  • DPD digital pre-distortion
  • DPD digital pre-distortion
  • the generated analog signal passes through the corresponding original 2G/ in the micro-station
  • the RF module of the 3G transmission frequency band performs processing including filtering, amplification, up-conversion, RF amplification, and RF filtering, and shares the 4G micro-station antenna to complete the transmission of the 2G/3G source.
  • the external source receives the indoor mobile signal:
  • the indoor 2G/3G mobile signal is received through the micro-station antenna and the RF module corresponding to the 2G/3G receiving frequency band in the micro-station, and subjected to down-conversion, filtering, amplification transmission, and analog-to-digital conversion after radio frequency filtering and amplification processing.
  • the analog signal is converted into a digital signal, and then enters the digital signal processing module for frequency shifting, DDC, and noise reduction processing, and the processed signal is transmitted to the interface conversion module through the network cable.
  • the interface conversion module converts the received digital signal of the external source into an optical signal, and then transmits the signal to the multi-source access unit through the optical fiber.
  • the signal first converts the optical signal into a digital signal through the second photoelectric conversion module in the multi-source access unit, and then performs DUC and frequency shift on the converted digital signal (moving the multi-carrier to the corresponding carrier frequency point) Processing, and then converting the digital signal into an analog signal through a digital-to-analog converter, generating an analog signal
  • the RF module corresponding to the original 2G and 3G receiving frequency bands in the multi-source access unit is used to transmit the signal to the original 2G/3G signal by using the RF feeder or antenna.
  • the source RF receiving unit completes the reception of the 2G/3G source.
  • the self-owned 4G source only converts the optical signal into an electrical signal at the input port through the optical module interface of the multi-source access unit, and converts the electrical signal into an optical signal at the output port, after such photoelectric conversion and photoelectric inverse
  • the conversion realizes the transparent transmission of the self-owned signal, and then enters the original interface conversion and signal processing of the micro-station, and the radio frequency transceiver system to complete the coverage of the 4G signal.
  • the transmission and reception process of the external source of the multi-source access macro station indoor coverage system shown in FIG. 6 is consistent with the multi-source access micro-station indoor coverage system shown in FIG. 7 , the difference is that The signal conversion unit and the micro-station need to perform photoelectric conversion or inverse conversion on the signal by the interface conversion unit, thereby realizing signal transmission between the multi-source access unit and the micro-station.
  • the present application discloses a multi-source access method and system.
  • the method includes: a multi-source access unit sequentially performs photoelectric conversion and photoelectric inverse conversion processing on an own source baseband optical signal to realize free source baseband light. Transmitting the signal; the multi-source access unit processes the external source RF signal into an external source digital signal, and performs photoelectric conversion processing on the processed external source digital signal to obtain an external source optical signal; The multi-source access unit transmits the own source baseband optical signal and the external source optical signal to the indoor coverage system through the same optical fiber, so that the indoor coverage system implements a multi-source compatible indoor signal cover.
  • the multi-source access method and system disclosed in the present application enable multi-source signals of different manufacturers or different systems to simultaneously share a set of indoor coverage systems, thereby significantly reducing the construction cost of the indoor distribution system and the difficulty of system planning and design.

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Abstract

公开了一种多信源接入方法及系统，所述方法包括：多信源接入单元对自有信源基带光信号依次进行光电转换和光电逆转换处理，实现自由信源基带光信号透传；所述多信源接入单元将外接信源射频信号处理成外接信源数字信号，并对处理得到的所述外接信源数字信号进行光电转换处理，得到外接信源光信号；所述多信源接入单元通过同一光纤将所述自有信源基带光信号和所述外接信源光信号发送给室内覆盖系统，以便由所述室内覆盖系统实现兼容多信源的室内信号覆盖。所公开的多信源接入方法及系统使得不同厂家或不同制式的多信源信号能够同时共用一套室内覆盖系统，从而显著降低了室内分布系统的建设成本和系统规划设计难度。

Description

一种多信源接入方法及系统 技术领域
本申请涉及移动通信领域，例如涉及一种多信源接入方法及系统。
背景技术
随着通讯技术的发展，多制式用户共存的现象要求运营商提供多种通信制式设备共存的应用场景。那么，如何在保留原有的旧制式信号覆盖基础上，同时增加新制式信号的移动设备，实现共存，成为一个可探讨课题，因为这不仅可以兼顾现有多制式用户的移动通信需求，同时可以节省运营商购买成本和维护成本。
有数据显示超过80％的移动通信业务都发生在室内环境，图1是相关技术提供的常用宏站室内覆盖系统示意图，如图1所示，其原理是利用天馈形成室内天线分布系统，即，室分系统，将移动基站的信号分布在室内每个角落，从而保证室内区域拥有理想的信号覆盖。图2是相关技术提供的微站室内覆盖示意图，从图2所示的结构可以看出，微型基站主要是通过网线布局，相对图1所示的宏站室内覆盖系统，由于减少了包含功分器和耦合器的室分系统，减少了硬件成本，同时光纤和网线传输对比馈线传输的信号衰减量非常小，大大降低了对基站输出功率的要求，因此室内信号覆盖也逐步开始使用微站来布局完成。
在保留原通信设备基础上增加新制式移动通信覆盖，常规的方法就是再增加一套新制式设备对应的如图1所示的宏站室内覆盖系统或如图2所示的微站宏站室内覆盖系统。以图1所示结构为例，一套宏站室内分布系统包括多个功分器、耦合器以及室分天馈系统，多制式移动设备的接入覆盖会出现多套宏站室内分布系统，随着覆盖范围增大，导致室内分布系统重复建设以及馈线布局混乱，运营成本也会随之成倍增加。也就是说，现有的针对新制式移动信号覆盖而增加对应的室内分布系统的设计方式，会造成室内分布系统的重复建设以及长距离天馈系统的布局混乱，导致运营成本大幅度增加，系统规划设计难度增大。
发明内容
本发明实施例提供一种多信源接入方法及系统，能更好地解决多信源信号同时共用一套室内覆盖系统的问题。
根据本发明实施例的一个方面，提供了一种多信源接入方法，包括：
多信源接入单元对自有信源基带光信号依次进行光电转换和光电逆转换处理，实现自有信源基带光信号透传；
所述多信源接入单元将外接信源射频信号处理成外接信源数字信号，并对处理得到的所述外接信源数字信号进行光电转换处理，得到外接信源光信号；
所述多信源接入单元通过同一光纤将所述自有信源基带光信号和所述外接信源光信号发送给室内覆盖系统，以便由所述室内覆盖系统实现兼容多信源的室内信号覆盖。
所述的多信源接入单元将外接信源射频信号处理成外接信源数字信号，可以包括：
所述多信源接入单元通过射频馈线或天线接入外接信源射频信号，并经由外接信源射频模块传输；
对所述经由外接信源射频模块传输后的信号依次进行模数转换处理和数字信号处理，得到外接信源数字信号。
所述的由所述室内覆盖系统实现兼容多信源的室内信号覆盖，可以包括：
所述室内覆盖系统将收到的自有信源基带光信号转换成自有信源基带数字信号，将转换得到的自有信源基带数字信号依次进行数字信号处理和数模转换处理，并将处理得到的信号经由自有信源射频发射通道传输；
将收到的外接信源光信号转换成外接信源数字信号，将转换得到的外接信源数字信号依次进行数字信号处理和数模转换处理，并将处理得到的信号经由外接信源射频发射通道传输；
通过所述室内覆盖系统的天馈系统，将所述经由自有信源射频发射通道传输的信号和所述经由外接信源射频发射通道传输的信号发射出去，从而实现兼容多信源的室内覆盖。
还可以包括：
所述室内覆盖系统经由自有信源射频接收通道接收第一室内移动用户信号(即自有信源对应的用户信号)，并对所述第一室内移动用户信号依次进行包括变频、放大、滤波在内的射频信号处理、模数转换处理、数字信号处理和光电转换处理，得到自有信源对应的光信号，并发送至所述多信源接入单元；
所述室内覆盖系统经由外接信源射频接收通道接收第二室内移动用户信号(即外接信源对应的用户信号)，并对所述第二室内移动用户信号依次进行包括变频、放大、滤波在内的射频信号处理、模数转换处理、数字信号处理和光电转换处理，得到外接信源对应的光信号，并发送至所述多信源接入单元。
还可以包括：
所述多信源接入单元对所述自有信源对应的光信号依次进行光电转换和光电逆转换处理，并将处理后的信号发送至自有信源基带单元；
所述多信源接入单元对所述外接信源对应的光信号依次进行光电转换处理、数字信号处理以及数模变换处理，并将处理得到的信号经由外界信源射频模块发送至外接信源射频拉远单元。
根据本发明实施例的另一方面，提供了一种多信源接入系统，包括：
多信源接入单元，被配置为对自有信源基带光信号依次进行光电转换和光电逆转换处理，实现自有信源基带光信号透传，并将外接信源射频信号处理成外接信源数字信号，对处理得到的所述外接信源数字信号进行光电转换处理，得到外接信源光信号，然后通过同一光纤将所述自有信源基带光信号和所述外接信源光信号发送给室内覆盖系统；
所述室内覆盖系统，被配置为利用所述同一光纤传入的所述自有信源基带光信号和所述外接信源光信号实现兼容多信源的室内信号覆盖。
所述多信源接入单元可以包括：
第一光电转换模块，被配置为将自有信源基带光信号转换成自有信源基带电信号；
外接信源射频模块，被配置为传输通过射频馈线或天线接入的外接信源射频信号；
数字信号处理模块，被配置为对经由所述外接信源射频模块传输的信号依次进行模数转换处理和数字信号处理，得到外接信源数字信号；
第二光电转换模块，被配置为将所述自有信源基带电信号和所述外接信源数字信号转换为自有信源基带光信号和外接信源光信号。
所述室内覆盖系统可以包括：
光电转换单元，被配置为将收到的自有信源基带光信号转换成自有信源基带数字信号，并将收到的外接信源光信号转换成外接信源数字信号；
数字信号处理单元，被配置为将转换得到的自有信源基带数字信号依次进行数字信号处理和数模转换处理，并将处理得到的信号经由自有信源射频发射通道传输；将转换得到的外接信源数字信号依次进行数字信号处理和数模转换处理，并将处理得到的信号经由外接信源射频发射通道传输。
所述室内覆盖系统的数字信号处理单元还可以被配置为经由自有信源射频接收通道接收已进行包括变频、放大、滤波在内的射频信号处理的第一室内移动用户信号，对所接收的第一室内移动用户信号进行模数转换处理、数字信号处理和光电转换处理，得到自有信源对应的光信号，并发送至所述多信源接入单元。
所述多信源接入单元的第二光电转换模块可以对来自室内覆盖系统的所述自有信源对应的光信号进行光电转换，得到所述自有信源对应的电信号，以供所述第一光电转换模块对所述自有信源对应的电信号进行光电逆转换处理，并将处理后的信号发送至自有信源基带单元。
所述室内覆盖系统的数字信号处理单元还可以被配置为经由外接信源射频接收通道接收已进行包括变频、放大、滤波在内的射频信号处理的第二移动用户信号，对所接收的第二移动用户信号进行模数转换处理、数字信号处理和光电转换处理，得到外接信源对应的光信号，并发送至所述多信源接入单元。
所述多信源接入单元的第二光电转换模块可以对来自室内覆盖系统的所述外接信源对应的光信号进行光电转换处理，得到所述外接信源对应的电信号，以供所述数字信号处理模块对所述外接信源对应的电信号进行数字信号处理，并将处理得到的信号经由外接信源射频模块发送至外接信源射频拉远单元。
与相关技术相比较，本发明实施例的有益效果在于：
本发明实施例可以在布局新制式信号宏站室内覆盖或微站室内覆盖系统的同时，使用射频馈线或天线接入原有的其他厂家、其他制式信源的射频信号，即多信源信号能够同时共用一套室内覆盖系统，从而显著降低了室内覆盖系统的建设成本和系统规划设计难度。
附图概述
图1是相关技术提供的常用宏站室内覆盖系统示意图；
图2是相关技术提供的微站室内覆盖示意图；
图3是本发明实施例提供的多信源接入方法的信号发射流程图；
图4是本发明实施例提供的多信源接入方法的信号接收流程图；
图5是本发明实施例提供的多信源接入单元功能框图；
图6是本发明实施例提供的多信源接入宏站覆盖系统的示意图；
图7是本发明实施例提供的多信源接入微站覆盖系统的示意图。
本发明的实施方式
以下结合附图对本发明实施例进行详细说明，应当理解，以下所说明的实施例仅用于说明和解释本发明，并不用于限定本发明。
图3是本发明实施例提供的多信源接入方法的信号发射流程图，如图3所示，步骤包括：
步骤S101：多信源接入单元对自有信源基带光信号依次进行光电转换和光电逆转换处理，实现自有信源基带光信号透传，同时，所述多信源接入单元将外接信源射频信号处理成外接信源数字信号，并对处理得到的所述外接信源数字信号进行光电转换处理，得到外接信源光信号。
自有信源基带信号通过自有信源对应的基带单元产生，所述基带单元通常放置于通信机房中。
将自有信源基带光信号通过两次光电转换，实现自有信源基带光信号在多信源接入单元中的透传，也就是光信号转换为电信号然后再转换为光信号。
外接信源射频信号可以是通过天线无线接入的室外射频信号，也可以是通过馈线有线接入的外接信源射频信号。
外接信源射频信号经由多信源接入单元的外接信源射频模块传输，然后对所述经由外接信源射频模块传输后的信号依次进行模数转换处理和数字信号处理，得到外接信源数字信号。
其中，在经由外接信源射频模块传输所接入的外接信源射频信号期间，对所述射频信号进行滤波、放大、变频等信号处理。
步骤S102：所述多信源接入单元通过同一光纤将所述自有信源基带光信号和所述外接信源光信号发送给室内覆盖系统，所述室内覆盖系统包括宏站室内覆盖系统或微站室内覆盖系统，以便实现兼容多信源的室内信号覆盖。
步骤S103：所述室内覆盖系统所述同一光纤传入的所述自有信源基带光信号和所述外接信源光信号进行相应处理，并将处理得到的信号分别经由自有信源射频发射通道和外接信源射频发射通道发射出去。也就是说，在所述室内信号覆盖系统内，对所述自有信源基带光信号进行相应处理后，通过对应的自有信源射频模块进行信号传输实现对室内用户信号发射；对所述外接信源光信号进行相应处理后，通过对应的外接信源射频模块进行信号传输实现对室内用户信号发射。
对于多信源接入宏站室内覆盖系统，将收到的自有信源基带光信号转换成自有信源基带电信号，将转换得到的自有信源基带电信号进行数模转换，并将处理得到的信号经由自有信源射频发射通道传输；将收到的外接信源光信号转换成外接信源数字信号，将转换得到的外接信源数字信号依次进行数字信号处理和数模转换处理，并将处理得到的信号经由专用的外接信源射频发射通道传输；之后通过同样的天馈系统将所述经由自有信源射频发射通道传输的信号和所述经由外接信源射频发射通道传输的信号发射出去，从而实现兼容多信源的室内信号发射。对于多信源接入微站室内覆盖系统，通过接口转换模块将收到的自有信源基带光信号转换成自有信源基带电信号，并通过网线传输到微站设备，转换得到的自有信源基带电信号经过相应的数字信号处理以及数模转换后转变为模拟信号，并经由自有信源射频发射通道进行变频、放大、滤波等处理；将收到的外接信源光信号转换成外接信源数字信号，将转换得到的外接信源数字信号依次进行数字信号处理和数模转换处理，并将处理得到的信号经由外接 信源射频发射通道传输；之后通过同样的天线，将所述经由自有信源射频发射通道传输的信号和所述经由外接信源射频发射通道传输的信号发射出去，从而实现兼容多信源的室内覆盖。
图4是本发明实施例提供的多信源接入方法的信号接收流程图，如图4所示，步骤包括：
步骤S201：所述室内覆盖系统将经由外接信源射频接收通道接收的外接信源对应的室内信号和经由自有信源射频接收通道接收的自有信源对应的室内信号分别处理为相应的光信号。
所述室内覆盖系统经由外接信源射频接收通道接收外接信源对应的室内信号(即第二室内移动用户信号/外接信源对应的接收信号)，并对所述外接信源射频接收通道传输并处理后的信号进行模数转换和光电转换处理，得到外接信源对应的光信号。同时，所述室内覆盖系统经由自有信源射频接收通道接收自有信源对应的室内信号(即第一室内移动用户信号/外接信源对应的接收信号)，并对所述自有信源射频接收通道传输并处理后的信号进行模数转换和光电转换处理，得到自有信源对应的光信号。
步骤S202：所述室内覆盖系统通过同一光纤将其接收到并进行相应处理而得到的所述自有信源和所述外接信源对应的光信号传送给多信源接入单元。
步骤S203：所述多信源接入单元对所述外接信源对应的光信号进行光电转换和数字信号处理，将处理得到的信号经由外接信源射频模块发送至外接信源射频拉远单元，对所述自有信源对应的光信号依次进行光电转换和光电逆转换处理，并将处理后的信号发送至自有信源基带单元。
所述多信源接入单元对所述外接信源对应的光信号进行光电转换和数字信号处理，并将处理得到的信号经由外界信源射频模块发送至外接信源射频拉远单元。同时，所述多信源接入单元对所述自有信源对应的光信号依次进行光电转换和光电逆转换处理，并将处理后的信号发送至自有信源基带单元。
从原理上说，室内信号接收与发射的处理过程是互逆过程，通过对室内多制式移动手机设备进行信号发射以及信号接收，实现基站与移动用户的通信交互，从而完成多信源的室内信号覆盖。
图5是本发明实施例提供的多信源接入单元功能框图，所述多信源接入单 元对自有信源基带光信号依次进行光电转换和光电逆转换处理，实现自有信源基带光信号透传，并将外接信源射频信号处理成外接信源数字信号，对处理得到的所述外接信源数字信号进行光电转换处理，得到外接信源光信号，然后通过同一光纤将所述自有信源基带光信号和所述外接信源光信号发送给室内覆盖系统，以供所述室内覆盖系统利用所述同一光纤传入的所述自有信源基带光信号和所述外接信源光信号实现兼容多信源的室内信号覆盖。如图5所示，包括：第一光电转换模块10、外接信源射频模块21和数字信号处理模块22、第二光电转换模块30。其中：
在室内信号覆盖过程中，第一光电转换模块10将自有信源基带光信号转换成自有信源基带电信号，外接信源射频模块21传输通过射频馈线或天线接入的外接信源射频信号，数字信号处理模块22对经由所述外接信源射频模块21传输的信号依次进行模数转换处理和数字信号处理，得到外接信源数字信号，第二光电转换模块30将所述自有信源基带电信号和所述外接信源数字信号分别转换为自有信源基带光信号和外接信源光信号，并利用同一光纤传入室内覆盖系统。
在室内信号接收过程中，第二光电转换模块30对来自室内覆盖系统的自有信源对应频段的光信号进行光电转换，得到所述自有信源对应的电信号，第一光电转换模块10对所述自有信源对应的电信号进行光电逆转换处理，并将处理后的信号发送至自有信源基带单元。第二光电转换模块30对来自室内覆盖系统的外接信源对应频段的光信号进行光电转换处理，得到所述外接信源对应的电信号，数字信号处理模块22对所述外接信源对应的电信号进行所述多信源接入单元和数字信号处理之后，并将处理得到的信号经由外接信源射频模块21发送至外接信源射频拉远单元。
对于兼容多信源的室内信号发射过程：
第一光电转换模块10将自有信源基带光信号转换成自有信源基带电信号。外接信源射频模块21通过射频馈线或天线接入外接信源射频信号，并经由外接信源射频发射通道传输，在经由外接信源射频发射通道传输所接入的外接信源射频信号期间，对所述射频信号进行包括滤波、放大、变频在内的处理；数字信号处理模块22对所述经由外接信源射频发射通道传输后的信号依次进行模数转换处理和数字信号处理，得到外接信源数字信号，所述数字信号处理包括移 频、数字下变频、降噪等处理。第二光电转换模块30将所述自有信源基带电信号和所述外接信源数字信号转换成自有信源基带光信号和外接信源光信号，并通过同一光纤将所述自有信源基带光信号和所述外接信源光信号发送给宏站室内覆盖系统或微站室内覆盖系统。
室内覆盖系统的光电转换单元将收到的自有信源基带光信号转换成自有信源基带数字信号，并将收到的外接信源光信号转换成外接信源数字信号；室内覆盖系统的数字信号处理单元将转换得到的自有信源基带数字信号依次进行数字信号处理和数模转换处理，将处理得到的信号经由自有信源射频发射通道传输，并将转换得到的外接信源数字信号依次进行数字信号处理和数模转换处理，并将处理得到的信号经由覆盖系统内对应的外接信源射频发射通道传输，从而实现兼容多信源的室内信号发射。
对于兼容多信源的室内信号接收过程：
室内覆盖系统经由自有信源射频接收通道接收第一室内移动用户信号，并在所述自有信源射频接收通道内传输所述第一室内移动用户信号期间对该信号进行变频、放大、滤波等射频信号处理，然后对经过射频信号处理得到的信号进行模数转换处理和光电转换处理，得到自有信源对应的光信号。另外，室内覆盖系统经由外接信源射频接收通道接收第二室内移动用户信号，并在所述外接信源射频接收通道内传输所述第二室内移动用户信号期间对所述第二室内移动用户信号进行变频、放大、滤波等射频信号处理，然后对经过射频信号处理得到的信号进行模数转换处理和光电转换处理，得到外接信源对应的光信号。之后，室内覆盖系统将所述自有信源对应的光信号和所述外接信源对应的光信号经由同一光纤传送至所述多信源接入单元。
第二光电转换模块30将所述宏站室内覆盖系统或微站室内覆盖系统处理并发送的自有信源对应接收的光信号和外接信源对应接收的光信号转换成自有信源对应接收的电信号和外接信源对应接收的电信号。
第一光电转换模块10将第二光电转换模块30处理得到的自有信源对应接收的电信号进行电光转换，得到自有信源对应的光信号，并将所得到的光信号送入自有信源对应的基带单元处理。外接信源射频模块21和数字信号处理模块22将第二光电转换模块30处理得到的外接信源对应接收的电信号进行包括数字上变频、移频等数字信号处理，并将处理得到的信号经由外接信源射频模块传 输，在经由外接信源射频模块传输期间，对所述信号进行数模转换以及滤波、放大、上变频、射频滤波等处理，得到外接信源对应的射频信号，并将所得到的射频信号发送至外接信源的射频拉远单元处理。
为了完成以上功能，该装置配备有相应的供电系统40、CPU系统(即CPU控制系统)50和时钟系统60，以保证该装置正常工作。
对于多信源接入宏站室内覆盖系统，本发明实施例实现了增加新制式移动信号覆盖同时共用一套室内覆盖系统。可以在布局新制式移动信号宏站室内覆盖的同时，使用射频馈线接入相对原有的不同厂家、不同制式的其他信源射频信号，进行射频传输、模数转换及数字信号处理，再光电转换为光信号，通过光纤进入射频拉远单元，并以原信号射频收发频率传输，和新的移动信源共用一套室内分布系统实现多制式信号覆盖。
对于多信源接入微站室内覆盖系统，本发明实施例也实现了增加新制式移动信号覆盖同时共用一套室内覆盖系统，相应的实现方式与多信源接入宏站室内覆盖系统相似，微型基站在使用图5所示多信源接入单元时，自有信源信号通过该装置光纤接入光纤输出，而其他不同厂家、不同制式外接信号通过射频馈线接入，也可以利用天线进行无线接入，然后进行射频传输、模数转换、数字信号处理和光电转换后使用光纤输出，再通过接口转换模块转为网线传输，进入微站并通过微站自有天线完成多信源信号覆盖。
也就是说，本发明实施例的技术方案包括：
1、对自有信源进行光电转换以及光电逆转换，在多信源接入单元进行透传，实现光纤接入、光纤输出。
2、对外接信源利用射频馈线或天线接入，进行射频信号变频传输、模数转换以及数字信号处理，然后进行光电转换，和自有信号共用同一光纤输出。
3、对于宏站室内覆盖系统，信号经过多信源接入单元后通过光纤进入宏站射频拉远单元，该宏站射频拉远单元除了具有自有信源信号对应的射频传输模块外，还具有一个对应外接信源频段的射频收发模块，以便实现外接信源信号的通信覆盖。
4、对于微站室内覆盖系统，与宏站室内覆盖系统类似，自有信源和外接信源通过多信源接入单元光纤输出后，再进入接口转换模块转换为电信号，实现 网线输出并进入微站，微站内的射频单元同样要增加设计一个对应外接信源频段的射频收发模块，来完成外接信源的室内通信覆盖。
其中，所述多信源接入单元接入的外接信源相对自有信源可以是不同制式、也可以是不同厂商基站设备输出信源，多个外接信源接入可以通过增加多信源接入单元中对应外接信源射频处理模块数量来实现，具有较广泛的可兼容性。对外接信源可以通过射频馈线接入或者使用天线无线接入，在多信源接入单元中对接入的射频信号进行射频链路传输、模数转换后进行数字信号处理，再经过光电转换转变为光信号，通过光纤输出，而外接信源的接收过程基本就是上述发射的逆过程。
下面结合附图对技术方案实施步骤进行详细的说明。
图6是本发明实施例提供的多信源接入宏站室内覆盖系统的示意图，图7是本发明实施例提供的多信源接入微站室内覆盖系统的示意图。使用多信源接入单元接入外接信源，转成光信号进入宏站射频拉远单元或微站系统后，要完成信号覆盖，并还原为原频段射频信号，因此在宏站射频拉远系统或者微站中进行如下设计：
(1)在软件上对外接外接信源信号做相应的数字信号处理；
(2)硬件上有对应的射频收发模块，
通过所述多信源接入单元以及所述室内覆盖系统针对外接信源的软硬件设计，从而实现外接信源通过多信源接入单元与自有信源共用室内覆盖系统完成信号覆盖。
以新楼宇4G微站系统覆盖为例，在本发明实施例提供的多信源接入单元设计中，假设一栋新的建筑楼宇，附近已有2G、3G覆盖，要求进行室内覆盖2G、3G、4G信号，而4G中标合同是微站系统。按照常规操作，分别增加2G、3G宏站室内分布系统，会同时存在两套宏站室内分布系统以及一套微站覆盖系统，成本倍增，而且宏站室内分布使用的馈线衰减较大，对原有2G/3G宏站输出功率有较大压力，因此可以使用多信源接入单元引入原有2G/3G信号覆盖，既不增加原有2G、3G基站输出功率，也不增加宏站室内分布系统，通过共用微站覆盖系统实现成本控制，轻松完成布局规划。相应的技术方案如下：
1.多信源接入单元设计分别对应原2G/3G信号频率的射频链路，利用射频 馈线或者天线无线接入，实现原2G/3G信源射频信号和多信源接入单元的收发连接。
2.对于外接信源的发射：
(1)接入的2G/3G射频发射信源进入多信源接入单元的对应原信源发射频段的射频模块，经过外接信源射频子模块进行射频滤波、放大以及下变频处理，再进行中频滤波、放大以及模数转换，将模拟信号转换为数字信号后进入数字信号处理子模块。
(2)数字信号处理子模块针对外接信源射频子模块输出的数字信号进行移频(多载波移频至零频)、数字下变频(Digital Down Conversion，DDC)、降噪处理，然后通过第二光电转换模块进行光电转换，产生光信号通过光纤将外接信源的发射信号传送至4G微站系统的接口转换模块。
(3)微站系统的接口转换模块除了完成微站自有信号转换功能外，同时还完成将外接信源光信号转化成电信号的功能，使得该信号可以通过网线传输。
(4)外接2G/3G发射信源通过接口转换模块处理后从网线进入4G微站系统，通过与微站中的数字信号处理模块，将数字信号进行数字上变频(Digital Up Conversion，DUC)、移频(将多载波移到对应载波频点)以及相应的削峰、数字预失真(Digital Pre-Distortion，DPD)处理，然后进行数模转换，产生的模拟信号通过微站中对应原2G/3G发射频段的射频模块进行包括滤波、放大、上变频、射频放大、射频滤波等处理，共用4G微站天线完成2G/3G信源的发射。
外接信源对室内移动信号的接收：
(1)首先通过微站天线以及微站内对应2G/3G接收频段的射频模块对室内2G/3G移动信号进行接收，经过射频滤波、放大处理后进行下变频、滤波、放大传输以及模数转换，将模拟信号转换为数字信号，然后进入数字信号处理模块进行移频、DDC、降噪处理，处理后的信号通过网线传输至接口转换模块。
(2)在接口转换模块将外接信源的接收数字信号转化成光信号，再通过光纤将该信号传输接入多信源接入单元。
(3)该信号在多信源接入单元中首先是通过第二光电转换模块将光信号转换为数字信号，然后对转换的数字信号进行DUC、移频(将多载波移到对应载波频点)处理，再通过数模转换器将数字信号转换为模拟信号，产生的模拟信 号通过多信源接入单元中对应原2G、3G接收频段的射频模块进行滤波、放大、上变频、再放大、射频滤波等处理后，利用射频馈线或天线将信号传输至原2G/3G信源射频接收单元，完成2G/3G信源的接收。
4.而自有4G信源仅通过多信源接入单元的光模块接口在输入端口将光信号转换为电信号，在输出端口将电信号转换为光信号，经过这样的光电转换以及光电逆转换实现自有信源信号透传，再进入微站原有的接口转换和信号处理、射频收发系统，完成4G信号的覆盖。
图6所示的多信源接入宏站室内覆盖系统对外接信源的发射和接收过程与图7所示的多信源接入微站室内覆盖系统原理上是一致的，区别在于，多信源接入单元与微站之间需要由接口转换单元对信号进行光电转换或逆转换，从而实现多信源接入单元与微站的信号传递。
由于通信系统中射频链路设计、数字信号处理以及信号转换等功能实现都有比较成熟的方案，而且方案实现方式也有多种(比如射频变频有高、低中频以及零中频三种方案)，上面给出的各部分功能实现的方式包括但不限于上述方式。
尽管上文对本发明实施例进行了详细说明，但是本发明不限于此，本技术领域技术人员可以根据本发明实施例的原理进行各种修改。因此，凡按照本发明实施例原理所作的修改，都应当理解为落入本发明的保护范围。
工业实用性
本申请公开了一种多信源接入方法及系统，所述方法包括：多信源接入单元对自有信源基带光信号依次进行光电转换和光电逆转换处理，实现自由信源基带光信号透传；所述多信源接入单元将外接信源射频信号处理成外接信源数字信号，并对处理得到的所述外接信源数字信号进行光电转换处理，得到外接信源光信号；所述多信源接入单元通过同一光纤将所述自有信源基带光信号和所述外接信源光信号发送给室内覆盖系统，以便由所述室内覆盖系统实现兼容多信源的室内信号覆盖。本申请公开的多信源接入方法及系统使得不同厂家或不同制式的多信源信号能够同时共用一套室内覆盖系统，从而显著降低了室内分布系统的建设成本和系统规划设计难度。

Claims (12)

  1. 一种多信源接入方法，包括：
    多信源接入单元对自有信源基带光信号依次进行光电转换和光电逆转换处理，实现自有信源基带光信号透传；
    所述多信源接入单元将外接信源射频信号处理成外接信源数字信号，并对处理得到的所述外接信源数字信号进行光电转换处理，得到外接信源光信号；
    所述多信源接入单元通过同一光纤将所述自有信源基带光信号和所述外接信源光信号发送给室内覆盖系统，以便由所述室内覆盖系统实现兼容多信源的室内信号覆盖。
  2. 根据权利要求1所述的方法，其中，所述的多信源接入单元将外接信源射频信号处理成外接信源数字信号，包括：
    所述多信源接入单元通过射频馈线或天线接入外接信源射频信号，并经由外接信源射频模块传输；
    对所述经由外接信源射频模块传输后的信号依次进行模数转换处理和数字信号处理，得到外接信源数字信号。
  3. 根据权利要求1或2所述的方法，其中，所述的由所述室内覆盖系统实现兼容多信源的室内信号覆盖，包括：
    所述室内覆盖系统将收到的自有信源基带光信号转换成自有信源基带数字信号，将转换得到的自有信源基带数字信号依次进行数字信号处理和数模转换处理，并将处理得到的信号经由自有信源射频发射通道传输；
    将收到的外接信源光信号转换成外接信源数字信号，将转换得到的外接信源数字信号依次进行数字信号处理和数模转换处理，并将处理得到的信号经由外接信源射频发射通道传输；
    通过所述室内覆盖系统的天馈系统，将所述经由自有信源射频发射通道传 输的信号和所述经由外接信源射频发射通道传输的信号发射出去，从而实现兼容多信源的室内覆盖。
  4. 根据权利要求3所述的方法，其中，还包括：
    所述室内覆盖系统经由自有信源射频接收通道接收第一室内移动用户信号，并对所述第一室内移动用户信号依次进行包括变频、放大、滤波在内的射频信号处理、模数转换处理、数字信号处理和光电转换处理，得到自有信源对应的光信号，并发送至所述多信源接入单元；
    所述室内覆盖系统经由外接信源射频接收通道接收第二室内移动用户信号，并对所述第二室内移动用户信号依次进行包括变频、放大、滤波在内的射频信号处理、模数转换处理、数字信号处理和光电转换处理，得到外接信源对应的光信号，并发送至所述多信源接入单元。
  5. 根据权利要求4所述的方法，其中，还包括：
    所述多信源接入单元对所述自有信源对应的光信号依次进行光电转换和光电逆转换处理，并将处理后的信号发送至自有信源基带单元；
    所述多信源接入单元对所述外接信源对应的光信号依次进行光电转换处理、数字信号处理以及数模变换处理，并将处理得到的信号经由外接信源射频模块发送至外接信源射频拉远单元。
  6. 一种多信源接入系统，包括：
    多信源接入单元，被配置为对自有信源基带光信号依次进行光电转换和光电逆转换处理，实现自有信源基带光信号透传，并将外接信源射频信号处理成外接信源数字信号，对处理得到的所述外接信源数字信号进行光电转换处理，得到外接信源光信号，然后通过同一光纤将所述自有信源基带光信号和所述外接信源光信号发送给室内覆盖系统；
    所述室内覆盖系统，被配置为利用所述同一光纤传入的所述自有信源基带光信号和所述外接信源光信号实现兼容多信源的室内信号覆盖。
  7. 根据权利要求6所述的系统，其中，所述多信源接入单元包括：
    第一光电转换模块，被配置为将自有信源基带光信号转换成自有信源基带电信号；
    外接信源射频模块，被配置为传输通过射频馈线或天线接入的外接信源射频信号；
    数字信号处理模块，被配置为对经由所述外接信源射频模块传输的信号依次进行模数转换处理和数字信号处理，得到外接信源数字信号；
    第二光电转换模块，被配置为将所述自有信源基带电信号和所述外接信源数字信号转换为自有信源基带光信号和外接信源光信号。
  8. 根据权利要求6或7所述的系统，其中，所述室内覆盖系统包括：
    光电转换单元，被配置为将收到的自有信源基带光信号转换成自有信源基带数字信号，并将收到的外接信源光信号转换成外接信源数字信号；
    数字信号处理单元，被配置为将转换得到的自有信源基带数字信号依次进行数字信号处理和数模转换处理，并将处理得到的信号经由自有信源射频发射通道传输；将转换得到的外接信源数字信号依次进行数字信号处理和数模转换处理，并将处理得到的信号经由外接信源射频发射通道传输。
  9. 根据权利要求8所述的系统，其中，所述室内覆盖系统的数字信号处理单元还被配置为经由自有信源射频接收通道接收已进行包括变频、放大、滤波在内的射频信号处理的第一室内移动用户信号，对所接收的第一室内移动用户信号进行模数转换处理、数字信号处理和光电转换处理，得到自有信源对应的光信号，并发送至所述多信源接入单元。
  10. 根据权利要求9所述的系统，其中，所述多信源接入单元的第二光电转换模块被配置为对来自室内覆盖系统的所述自有信源对应的光信号进行光电转换，得到所述自有信源对应的电信号，以供所述第一光电转换模块对所述自有信源对应的电信号进行光电逆转换处理，并将处理后的信号发送至自有信源基带单元。
  11. 根据权利要求8所述的系统，其中，所述室内覆盖系统的数字信号处理单元还被配置为经由外接信源射频接收通道接收已进行包括变频、放大、滤波在内的射频信号处理的第二移动用户信号，对所接收的第二移动用户信号进行模数转换处理、数字信号处理和光电转换处理，得到外接信源对应的光信号，并发送至所述多信源接入单元。
  12. 根据权利要求11所述的系统，其中，所述多信源接入单元的第二光电转换模块被配置为对来自室内覆盖系统的所述外接信源对应的光信号进行光电转换处理，得到所述外接信源对应的电信号，以供所述数字信号处理模块对所述外接信源对应的电信号进行数字信号处理，并将处理得到的信号经由外接信源射频模块发送至外接信源射频拉远单元。
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