WO2015024453A1 - 基于ftth网络的光纤和无线混合接入系统及混合接入方法 - Google Patents

基于ftth网络的光纤和无线混合接入系统及混合接入方法 Download PDF

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Publication number
WO2015024453A1
WO2015024453A1 PCT/CN2014/083900 CN2014083900W WO2015024453A1 WO 2015024453 A1 WO2015024453 A1 WO 2015024453A1 CN 2014083900 W CN2014083900 W CN 2014083900W WO 2015024453 A1 WO2015024453 A1 WO 2015024453A1
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WIPO (PCT)
Prior art keywords
unit
optical
signal
central office
remote
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PCT/CN2014/083900
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English (en)
French (fr)
Inventor
李军成
刘永飘
穆罕默德·夏瑞扎尔阿里亚思
索非伊恩·穆萨米塔里
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烽火通信科技股份有限公司
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Publication of WO2015024453A1 publication Critical patent/WO2015024453A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H04B10/25752—Optical arrangements for wireless networks
    • H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
    • H04B10/25754—Star network topology

Definitions

  • the present invention relates to the field of optical fiber access, and in particular to an optical fiber and wireless hybrid access system and a hybrid access method based on a FTTH (Fiber to the Home) network.
  • FTTH Fiber to the Home
  • FTTH has become the preferred access method for newly-built cells.
  • This access mode which is endowed as the ultimate solution, inherits the characteristics of large optical fiber transmission communication capacity, low loss, strong anti-electromagnetic interference capability, and because of its entire optical chain.
  • the roads are all passive components and have the characteristics of simple deployment and convenient maintenance. However, this type of access still has some coverage areas for areas where mountains, lakes, and important infrastructure-induced fiber optic deployments are difficult.
  • Wireless communication is also developing rapidly. From the initial macro base station to the later micro base station (Microcell), to the picocell (Picocell) and the femto base station (Femtocell), the wireless access is also constantly Extend to the customer premises.
  • the business driving force of wireless communication shifts rapidly from the initial voice call to the data and video services.
  • This change in service demand leads to an increase in the number of base station constructions and a tendency to approach the users.
  • Fiber access is based on passive optical network devices and fiber-optic arming. Wireless access uses fiber-optic connected base stations and backhaul equipment. Currently, fiber access and wireless access have problems of redundant construction and waste of fiber resources. Summary of the invention
  • the object of the present invention is to overcome the deficiencies of the above background art, and provide an optical fiber and wireless hybrid access system and a hybrid access method based on an FTTH network, which can not only multiplex optical fiber resources in a passive optical network, but also simplify the far
  • the design of the RF module reduces the size of the remote RF module, reduces the power consumption of the remote RF module, and greatly reduces the construction cost of the operator. It is a large number of pico bases close to the user. Station arming creates conditions, and on this basis, through microwave relay transmission, solves the problem of fiber access mode for areas with complex terrain such as mountains and lakes, and access blind spots in difficult places where optical fibers are deployed due to important infrastructure. .
  • the present invention provides an optical fiber and wireless hybrid access system based on an FTTH network, including a GPON central office OLT device and an optical distribution unit, and the central office OLT device is connected to the optical distribution unit through a fiber link, and the optical fiber link simultaneously transmits the digital Baseband signal and analog wireless signal, GPON central office OLT equipment includes 16 slots for PON interface disk and central office optical RF unit.
  • GPON central office OLT equipment includes 16 slots for PON interface disk and central office optical RF unit.
  • N wireless access channels in a fiber link direction KN 7.
  • the central office OLT device uses N central office optical radio units, one of which serves as the main office optical radio unit, and the remaining N-1 are used as the cascading optical radio unit, and the main office optical unit.
  • a PON port in the cascading PON interface disk, the main office optical transceiver radio unit is connected to the optical wiring unit through the optical fiber link, and the cascading optical RF unit is connected to the main office optical transceiver by the optical jumper.
  • the optical wiring unit includes an ODN and a combiner in the FTTH network, and the ODN is connected to the PON ONU through the optical fiber; the combiner connects up to seven remote optical RF units through the optical fiber;
  • the interface on the backplane side of the radio frequency unit is mainly a high-speed Ethernet interface, and the external interface of the optical transceiver unit of the main office is a wavelength division multiplexing optical interface, and the wavelength division multiplexing optical interface passes through the optical distribution unit.
  • each remote optical RF unit Connected to the remote optical transceiver unit; the external interface of the cascaded optical transceiver unit is cascaded to the panel of the main office optical unit by the optical jumper; the number of the remote optical unit and the optical unit The number of optical transceiver units is the same.
  • Different remote optical RF units use different uplink and downlink wavelengths for RF optical carrier transmission.
  • Each remote optical RF unit is connected to a microwave terminal through a wireless microwave channel.
  • Each microwave terminal Connected to the home network via an Ethernet cable, where:
  • the cascading end-office optical radio unit is used to: convert high-speed Ethernet data on the backplane side of the FTTH OLT device into a radio frequency signal transmitted on the optical fiber, without a central-end multiplexer unit, and the radio frequency through the optical jumper
  • the signal is cascaded to the main office optical transceiver unit;
  • the main office optical transceiver unit is used to: convert high-speed Ethernet data on the backplane side of the FTTH OLT device into a radio frequency signal transmitted on the optical fiber, and have a central-end multiplexer unit, and the central-end multiplexer unit is used for the level
  • the optical signal of the PON port and the optical signal of the multiplexed optical unit of the central office are multiplexed into a fiber link to be sent out;
  • ODN used to: complete the connection assignment of the fiber link
  • a combiner for: converting a multi-wavelength fiber link to a plurality of single-wavelength optical links; and a remote optical-borne radio unit for: passing the RF signal carried in the fiber link through the process
  • the internal antenna is sent out and receives wireless signals from its internal antenna, which is processed and sent to the fiber link;
  • Microwave terminal used to: complete conversion of wireless signals and Ethernet data
  • This link completes fiber access, for application scenarios that allow fiber arming; cascading with central office optical RF Unit 1 main office optical transceiver RF unit-fiber link-combiner-distal optical-borne radio unit-microwave terminal
  • This link completes wireless access, for applications not suitable for fiber-optic arming, forming optical fiber and wireless Hybrid access system.
  • the main office optical transceiver unit includes an interface processing unit, a digital modulation unit, a central office upconversion unit, a main control unit, a central office frequency shift keying FSK modulation unit, and a central office FSK.
  • the main control unit is connected to the central office FSK modulation unit and the central office FSK demodulation unit, the central office FSK modulation unit is connected to the central office unit, the central office FSK demodulation unit is connected to the central office branch unit, and the interface processing unit is connected.
  • the digital modulation unit is connected, and the digital modulation unit, the central office up-conversion unit, the central-end combining unit, the signal adjustment unit, the central-end laser/photodetector component, and the central-end multiplexer unit are sequentially connected, and the central-end laser/photodetector is simultaneously connected.
  • the component, the compensation amplifying unit, the central office branching unit, the central office down-conversion unit and the digital demodulation unit are sequentially connected, and the digital demodulation unit is also connected to the interface Unit is connected, wherein:
  • a main control unit configured to: generate central office monitoring data
  • the central office FSK modulation unit is configured to: complete FSK modulation of the central office monitoring data;
  • the central office FSK demodulation unit is configured to: complete FSK demodulation of the central office monitoring signal;
  • An interface processing unit configured to: complete a central office signal backplane interface processing
  • a digital modulation unit configured to: perform orthogonal modulation of the digital signal
  • the central office up-conversion unit is configured to: adjust the frequency of the central office signal upward;
  • the central office unit is configured to: complete the combination of the central office service signal and the central office monitoring signal; the signal adjusting unit is configured to: adjust the downlink signal to the linear region of the central office optical modulation unit; the central office laser/photodetector The laser in the component completes the electrical/optical conversion of the central office signal, and the optical detector in the component completes the optical/electrical conversion of the central office signal;
  • a compensation amplifying unit configured to: perform adjustment, adaptation, and compensation of the uplink signal
  • the central office branching unit is configured to: complete separation of the central office service signal from the central office monitoring signal;
  • the central office down-conversion unit is configured to: adjust the frequency of the central office signal downward;
  • a digital demodulation unit configured to: perform demodulation of the digital signal
  • the central office multiplexer unit is configured to: combine the PON optical signal, the optical signal of the main office optical transceiver unit, and the optical signals of at least six cascading optical transceiver units;
  • the cascading central office optical radio unit reduces the local multiplex unit on the basis of the main office optical unit, and the functions and connection relationships of the remaining units are unchanged.
  • the remote optical radio unit includes a remote antenna, a duplexer, a controlled unit, a remote FSK modulation unit, a remote FSK demodulation unit, a low noise amplifier, and a remote down conversion.
  • the FSK demodulation unit is connected, the remote FSK modulation unit is connected to the remote combining unit, the remote FSK demodulation unit is connected to the remote branch unit, the remote antenna is connected to the duplexer, and the duplexer and the low noise amplifier are connected.
  • a remote antenna configured to: receive and transmit microwave signals
  • a duplexer configured to: receive and transmit signals, and perform transmission and reception through an antenna
  • a controlled unit configured to: manage remote monitoring data
  • a remote FSK modulation unit configured to: complete FSK modulation of remote monitoring data
  • a remote FSK demodulation unit configured to: perform FSK demodulation of the remote monitoring signal
  • a low noise amplifier for: low noise amplification of the signal received from the antenna
  • a remote down-conversion unit configured to: adjust a frequency of the far-end signal downward;
  • the remote combining unit is configured to: complete the combination of the remote service signal and the remote monitoring signal; the laser in the remote laser/photodetector component completes the electrical/optical conversion of the far-end signal, and the photodetector in the component Completing the optical/electrical conversion of the far-end signal;
  • the remote branching unit is configured to: complete separation of the remote service signal from the remote monitoring signal; and the remote up-conversion unit is configured to: adjust the frequency of the far-end signal upward;
  • the microwave terminal includes a microwave terminal antenna, an outdoor unit, and an indoor unit that are sequentially connected, and the outdoor unit side transmits the wireless channel and the remote light through the microwave terminal antenna.
  • the frequency unit is connected, and the other side of the outdoor unit is connected to the indoor unit through a coaxial cable, and the indoor unit is connected to the home network through an Ethernet line, wherein:
  • a microwave terminal antenna for: transmitting and receiving microwave signals
  • An outdoor unit configured to: perform conversion of a microwave signal and an intermediate frequency signal
  • the present invention also provides an FTTH network-based optical fiber and wireless hybrid access method using the above optical fiber and wireless hybrid access system, comprising the following steps:
  • the signal processing in the downstream direction is as follows:
  • the baseband data signal on the backplane of the OLT device of the GPON central office is level buffered by the interface processing unit, and processed by the main and standby switching. After digital compression, code modulation, digital-to-analog conversion and filtering processing by the digital modulation unit, the frequency becomes 350MHz.
  • the analog carrier signal is up-regulated by the central-end up-conversion unit to become a radio frequency signal with a frequency of 2 GHz; the central office monitoring data of the main control unit is FSK-modulated by the central-end FSK modulation unit to obtain a central office with a frequency of 433 MHz.
  • the monitoring signal the central office unit combines the RF signal outputted by the central end up-conversion unit with a frequency of 2 GHz and the central-end monitoring signal of the local-end FSK modulation unit with a frequency of 433 MHz, and the signal adjustment unit will be combined.
  • the signal is adjusted to the working linear region of the laser in the central laser/photodetector assembly, and the laser in the central laser/photodetector assembly performs electrical/optical conversion on the adjusted signal to be converted into an optical RF signal;
  • the central office multiplexer unit in the main office optical transceiver unit combines the signal with the optical signal output by the original PON interface disk, and multiplexes optical signals of different wavelengths into one optical fiber for transmission to the optical distribution.
  • the line unit, the combiner in the optical wiring unit separates the PON optical signal from the optical RF signal, wherein the PON optical signal is transmitted to the PON ONU device via the ODN, and the optical RF signal is transmitted to the remote optical RF unit. ;
  • the photodetector in the remote laser/photodetector assembly in the remote optical RF unit receives the optical RF signal from the combiner in the optical distribution unit, and optically/electrically converts the signal to obtain An electrical signal comprising a radio frequency signal having a frequency of 2 GHz and a remote monitoring signal having a frequency of 433 MHz; the remote branching unit separating the radio frequency signal having a frequency of 2 GHz from the remote monitoring signal having a frequency of 433 MHz.
  • the RF signal with a frequency of 2 GHz is adjusted to a frequency of 15 GHz by the remote up-conversion unit, and the RF signal of the frequency of 15 GHz is subjected to RF filtering, power amplification processing of the power amplifier, and then through the duplexer.
  • the remote monitoring signal with a frequency of 433 MHz is demodulated by the FSK of the remote FSK demodulation unit.
  • Remote monitoring data the remote FSK demodulation unit sends the obtained remote monitoring data to the controlled unit;
  • the microwave terminal antenna in the microwave terminal receives the RF signal with a frequency of 15 GHz from the remote optical-borne radio unit, and the outdoor unit
  • the signal is down-converted to obtain an intermediate frequency signal with a frequency of 140 MHz.
  • the microwave terminal monitoring data in the outdoor unit is modulated by amplitude-keyed ASK to a microwave terminal monitoring signal with a frequency of 5.5 MHz, and the outdoor unit has an intermediate frequency signal with a frequency of 140 MHz.
  • the microwave terminal monitoring signal with the frequency of 5.5MHz is transmitted to the indoor unit through the intermediate frequency cable, and the indoor unit converts the intermediate frequency signal with the frequency of 140MHz into the original Ethernet data frame through frequency conversion, analog-to-digital conversion, demodulation and decoding; Performing ASK demodulation on the microwave terminal monitoring signal with a frequency of 5.5 MHz, obtaining microwave terminal monitoring data, and transmitting the obtained microwave terminal monitoring data to the monitoring unit inside the indoor unit;
  • the signal processing in the upstream direction is as follows:
  • the indoor unit in the microwave terminal modulates the original Ethernet data into a carrier signal with a frequency of 350 MHz, and the indoor unit also performs ASK modulation on the microwave terminal monitoring data to obtain a microwave terminal monitoring signal with a frequency of 10 MHz, and a carrier signal with a frequency of 350 MHz.
  • the microwave terminal monitoring signal with the frequency of 10MHz is transmitted to the outdoor unit through the intermediate frequency cable, and the outdoor unit performs up-conversion processing to obtain a microwave signal with a frequency of 15 GHz, and the outdoor unit power-amplifies the microwave signal with a frequency of 15 GHz, and then passes the microwave.
  • the terminal antenna is transmitted;
  • the remote antenna in the remote optical transceiver unit receives the signal from the microwave terminal antenna, and is isolated by the transceiver channel inside the duplexer, and then amplified by the low noise amplifier, and the remote down conversion unit changes the frequency into frequency.
  • the remote monitoring data of the controlled unit is modulated by the remote FSK modulation unit to become a remote monitoring signal with a frequency of 433 MHz; the RF signal with a frequency of 2 GHz and the remote monitoring signal with a frequency of 433 MHz pass.
  • the laser in the remote laser/photodetector assembly is electrically/optically converted to obtain an optical RF signal and sent to the combiner in the optical wiring unit, and the combiner will
  • the optical RF signal is combined with the PON optical signal sent by the PON ONU device via the ODN, and transmitted to the main office optical transceiver unit;
  • the central-end multiplexer unit in the main-purpose optical transceiver unit receives the optical signal from the multiplexer in the optical distribution unit, and decomposes the signal into optical signals of multiple wavelengths, and respectively sends them to the PON interface disk.
  • the PON port and the cascade use the optical transceiver unit of the central office; the photodetector in the central laser/photodetector component performs optical/electrical conversion on the optical signal to obtain an electrical signal, and the compensation amplifying unit compensates the electrical signal,
  • the amplification process is performed to obtain a mixed signal of a radio frequency signal having a frequency of 2 GHz and a central monitoring signal having a frequency of 433 MHz; the radio frequency signal having a frequency of 2 GHz and a frequency of 433 MHz in the mixed signal of the central branch unit
  • the central office monitoring signal is separated, and the separated radio frequency signal is down-regulated by the central end down-conversion unit to become an analog carrier signal with a frequency of 140 MHz.
  • the central office FSK demodulation unit After the analog carrier signal is subjected to analog-to-digital conversion, code demodulation by the digital demodulation unit, It becomes the baseband data signal, and finally enters the system backplane after the level buffer protection of the interface processing unit and the active/standby switching process; the central office FSK demodulation unit performs the local terminal monitoring signal with the frequency of 433 MHz separated by the central office branching unit. The FSK demodulation obtains the uplink central office monitoring data, and then outputs the central office monitoring data to the main control unit.
  • the invention perfectly combines the optical network and the wireless network, fully utilizes the respective advantages, converts the baseband signal into the radio frequency signal at the central office, can not only multiplex the optical fiber resources in the passive optical network, but also can simplify the design of the remote radio frequency module. , reducing the size of the remote radio module, reducing the power consumption of the remote radio module, greatly reducing the operator's construction cost, creating conditions for a large number of pico base stations close to the user, and transmitting on the basis of wireless relay To solve the problem of fiber access mode for areas with complex terrain such as mountains and lakes, and access blind spots where there are important infrastructures for fiber deployment difficulties, and finally integrate wireless systems into OLT (Optical Line Terminal) ), unified management of optical networks and wireless networks.
  • OLT Optical Line Terminal
  • Figure 1 is a block diagram showing the structure of an optical fiber and wireless hybrid access system based on an FTTH network in an embodiment of the present invention.
  • FIG. 2 is a block diagram showing the structure of an active optical transceiver unit of a central office in a GPON central office OLT device according to an embodiment of the present invention.
  • FIG. 3 is a structural block diagram of a cascaded optical transceiver unit at a GPON central office OLT device according to an embodiment of the present invention.
  • FIG. 4 is a structural block diagram of a remote optical radio unit in the embodiment of the present invention.
  • FIG. 5 is a structural block diagram of a microwave terminal in an embodiment of the present invention. detailed description
  • an embodiment of the present invention provides a fiber-optic and wireless hybrid access system based on an FTTH network, including a Gigabit-Capable Passive Optical Network (GPON).
  • the central office OLT device and the optical distribution unit, the central office OLT device is connected to the optical distribution unit through a fiber link, and the optical fiber link simultaneously transmits the digital baseband signal and the analog wireless signal.
  • the GPON central office OLT device consists of 16 slots for PON (Passive Optical Network) interface disk and central office optical RF unit.
  • the central office OLT device needs to use N central office optical radio units, one of which serves as the primary office optical radio unit, and the remaining N-1 serve as the cascaded optical radio unit.
  • the primary office optical transceiver unit can also cascade one PON port in the PON interface disk. In Figure 1, only two central-end optical RF units and one PON interface in the PON interface disk are shown.
  • the first office-side optical-borne radio unit is used as the main office optical transceiver unit and is connected to the optical fiber link through the fiber link.
  • the optical wiring unit, the second office optical transceiver unit is used as a cascading optical radio unit, which is connected to the panel of the main office optical transceiver unit through an optical jumper.
  • the optical distribution unit includes an ODN (Optical Distribution Network) and a combiner in the FTTH network, and the 0DN is connected to the PON ONU (Optical Network Unit) through the optical fiber; the combiner can be connected up to 7 through the optical fiber.
  • the remote-side radio frequency unit of the central office is mainly a high-speed Ethernet interface, and the external interface of the optical transceiver unit of the main office is a wavelength division multiplexing optical interface.
  • the wavelength division multiplexing optical interface is connected to the remote optical RF unit through the optical wiring unit; the external interface of the cascaded optical transceiver unit is cascaded to the panel of the main office optical unit by the optical jumper. .
  • the number of remote optical radio units is the same as the number of optical transceiver units at the local end. Different remote optical radio units use different uplink and downlink wavelengths for RF optical transmission.
  • Each remote optical radio unit is connected to a microwave terminal through a wireless microwave channel, and each microwave terminal is connected to the home network through an Ethernet line, wherein:
  • the cascading end-end optical radio unit is used to: convert high-speed Ethernet data on the backplane side of the FTTH 0LT device into a radio frequency signal transmitted on the optical fiber, without a central-end multiplexer unit, and the radio frequency through the optical jumper
  • the signal is cascaded to the main office optical transceiver unit;
  • the main office optical transceiver radio unit is used to: convert high-speed Ethernet data on the backplane side of the FTTH 0LT device into a radio frequency signal transmitted on the optical fiber, and have a central-end multiplexer unit, and the central-end multiplexer unit is used for the level
  • the optical signal of the PON port and the optical signal of the multiplexed optical unit of the central office are multiplexed into a fiber link to be sent out;
  • ODN used to: complete the connection assignment of the fiber link
  • a combiner for: converting a multi-wavelength fiber link to a plurality of single-wavelength optical links; and a remote optical-borne radio unit for: passing the RF signal carried in the fiber link through the process
  • the internal antenna is sent out and receives wireless signals from its internal antenna, which is processed and sent to the fiber link;
  • Microwave terminal used to: Complete the conversion of wireless signals and Ethernet data.
  • the light-borne radio frequency unit, the main central office, the optical RF unit, the optical fiber link, the multiplexer, the remote optical unit, the microwave unit, the microwave terminal, and the wireless access terminal which is suitable for applications that are not suitable for fiber arming.
  • a fiber optic and wireless hybrid access system is formed.
  • the main office optical transceiver unit includes an interface processing unit, a digital modulation unit, a central office upconversion unit, a main control unit, and a central office FSK (Frequency Shift Keying) modulation unit.
  • End FSK demodulation unit central office combining unit, signal adjustment unit, central office laser/photodetector component, central office multiplexer unit, compensation amplification unit, central office branch unit, central office down conversion unit, and digital demodulation
  • the main control unit is connected to the central office FSK modulation unit and the central office FSK demodulation unit, the central office FSK modulation unit is connected to the central office unit, and the central office FSK demodulation unit is connected to the central office branch unit.
  • the unit is connected to the digital modulation unit, and the digital modulation unit, the central office up-conversion unit, the central-end combining unit, the signal adjustment unit, the central-end laser/photodetector component, and the central-end multiplexer unit are sequentially connected, and the central office laser/light is simultaneously connected.
  • the detector component, the compensation amplification unit, the central office branching unit, the central office down conversion unit and the digital demodulation unit are sequentially connected, and the digital demodulation unit Connected with the interface processing unit, wherein:
  • a main control unit configured to: generate central office monitoring data
  • the central office FSK modulation unit is configured to: complete FSK modulation of the central office monitoring data;
  • the central office FSK demodulation unit is configured to: complete FSK demodulation of the central office monitoring signal;
  • An interface processing unit configured to: complete a central office signal backplane interface processing
  • a digital modulation unit configured to: perform orthogonal modulation of the digital signal
  • the central office up-conversion unit is configured to: adjust the frequency of the central office signal upward;
  • the central office unit is configured to: complete the combination of the central office service signal and the central office monitoring signal; the signal adjusting unit is configured to: adjust the downlink signal to the linear region of the central office optical modulation unit; the central office laser/photodetector The laser in the component completes the electrical/optical conversion of the central office signal, and the optical detector in the component completes the optical/electrical conversion of the central office signal;
  • a compensation amplifying unit configured to: perform adjustment, adaptation, and compensation of the uplink signal
  • the central office branching unit is configured to: complete separation of the central office service signal from the central office monitoring signal;
  • the central office down-conversion unit is configured to: adjust the frequency of the central office signal downward;
  • a digital demodulation unit for: performing demodulation of the digital signal.
  • the central office multiplexing unit is configured to: combine the PON optical signal, the optical signal of the main office optical transceiver unit, and the optical signals of up to six cascaded optical transceiver units.
  • the cascading central-side optical-carrier radio unit reduces the central-end multiplexer unit on the basis of the main-office optical-borne radio unit, and the functions and connection relationships of the remaining units are unchanged.
  • the remote optical radio unit includes a remote antenna, a duplexer, a controlled unit, a remote FSK modulation unit, a remote FSK demodulation unit, a low noise amplifier, a remote downconversion unit, and a remote end.
  • Combining unit remote optical modulation unit, remote laser/photodetector component, remote branching unit, remote upconversion unit, power amplifier, controlled unit and remote FSK modulation unit, remote FSK demodulation
  • the unit is connected, the remote FSK modulation unit is connected to the remote combining unit, the remote FSK demodulation unit is connected to the remote branch unit, the remote antenna is connected to the duplexer, and the duplexer is connected to the low noise amplifier, low noise
  • the amplifier, the remote down-conversion unit, the remote combining unit, and the remote laser/light detecting unit are sequentially connected, and the remote laser/light detecting unit assembly is further connected with the remote branching unit, the remote up-converting unit, and the power amplifier. Connected, the power amplifier is connected to the duplexer, where:
  • a remote antenna configured to: receive and transmit microwave signals
  • a duplexer configured to: receive and transmit signals, and perform transmission and reception through an antenna
  • a controlled unit configured to: manage remote monitoring data
  • a remote FSK modulation unit configured to: complete FSK modulation of remote monitoring data
  • a remote FSK demodulation unit configured to: perform FSK demodulation of the remote monitoring signal
  • a low noise amplifier for: low noise amplification of the signal received from the antenna
  • a remote down-conversion unit configured to: adjust a frequency of the far-end signal downward;
  • the remote combining unit is configured to: complete the combination of the remote service signal and the remote monitoring signal; the laser in the remote laser/photodetector component completes the electrical/optical conversion of the far-end signal, and the photodetector in the component Completing the optical/electrical conversion of the far-end signal;
  • the remote branching unit is configured to: complete separation of the remote service signal from the remote monitoring signal; and the remote up-conversion unit is configured to: adjust the frequency of the far-end signal upward;
  • the microwave terminal includes a microwave terminal antenna, an ODU (Outdoor Unit), and an IDU (Indoor Unit) connected in sequence, and the outdoor unit side passes through the microwave terminal antenna.
  • the wireless channel is connected to the remote optical RF unit, and the other side of the outdoor unit is connected to the indoor unit through a coaxial cable, and the indoor unit is connected to the home network through an Ethernet cable, wherein:
  • a microwave terminal antenna for: transmitting and receiving microwave signals
  • An outdoor unit configured to: perform conversion of a microwave signal and an intermediate frequency signal
  • an embodiment of the present invention provides an optical fiber and wireless hybrid access method based on an FTTH network, including the following steps:
  • the signal processing in the downstream direction is as follows:
  • the baseband data signal on the backplane of the OLT device of the GPON central office is subjected to level buffer protection, active/standby switching processing of the interface processing unit, digital compression, code modulation, digital-to-analog conversion, and filtering by the digital modulation unit.
  • the central-end up-conversion unit After processing, it becomes an analog carrier signal with a frequency of 350MHz, and the signal is up-regulated by the central-end up-conversion unit to become a radio frequency signal with a frequency of 2 GHz; the central office monitoring data of the main control unit is FSK modulated by the central-end FSK modulation unit, The central end monitoring signal with a frequency of 433 MHz, the central end combining unit combines the RF signal outputted by the central end up-conversion unit with a frequency of 2 GHz and the central end monitoring signal of the local end FSK modulation unit with a frequency of 433 MHz, and the signal is combined.
  • the adjusting unit adjusts the combined signal to the working linear region of the laser in the central laser/photodetector assembly, and the laser in the central laser/photodetector assembly performs electrical/optical conversion on the adjusted signal to be converted into Optical RF signal.
  • the cascaded optical transceiver unit of the central office cascades the signal to the optical transceiver unit of the main office through the optical jumper; the central multiplexing unit in the main office optical transceiver unit transmits the signal to the original PON
  • the optical signals outputted by the interface board are multiplexed, and the optical signals of different wavelengths are multiplexed into one optical fiber and sent to the optical wiring unit.
  • the multiplexer in the optical wiring unit separates the PON optical signal from the optical RF signal.
  • the PON optical signal is transmitted to the PON ONU device via the ODN, and the optical RF signal is transmitted to the remote optical RF unit.
  • the photodetector in the remote laser/photodetector assembly in the remote optical transceiver unit receives the optical RF signal from the combiner in the optical distribution unit, and performs the signal on the signal.
  • the optical/electrical conversion obtains an electrical signal containing a radio frequency signal having a frequency of 2 GHz and a remote monitoring signal having a frequency of 433 MHz;
  • the remote branching unit is a radio frequency signal having a frequency of 2 GHz and a frequency of 433 MHz.
  • the remote monitoring signal is separated.
  • the RF signal with a frequency of 2 GHz is frequency-adjusted by the remote up-conversion unit, and becomes a radio frequency signal with a frequency of 15 GHz.
  • the RF signal of the frequency of 15 GHz is subjected to RF filtering and power amplification processing of the power amplifier. After being isolated by the transceiver channel inside the duplexer, it is sent out from the remote antenna; the remote monitoring signal with a frequency of 433MHz passes through the remote FSK demodulation unit. The FSK demodulation obtains the remote monitoring data, and the remote FSK demodulation unit sends the obtained remote monitoring data to the controlled unit.
  • the microwave terminal antenna in the microwave terminal receives a radio frequency signal with a frequency of 15 GHz sent from a remote optical unit, and the outdoor unit down-converts the signal to obtain an intermediate frequency signal with a frequency of 140 MHz.
  • the microwave terminal monitoring data is modulated by ASK (Amplitude Shift Keying) into a microwave terminal monitoring signal with a frequency of 5.5 MHz, and the outdoor unit passes the intermediate frequency signal with a frequency of 140 MHz and the microwave terminal monitoring signal with a frequency of 5.5 MHz through the intermediate frequency.
  • ASK Amplitude Shift Keying
  • the cable is transported to the indoor unit, and the indoor unit converts the intermediate frequency signal with a frequency of 140 MHz into a original Ethernet data frame by frequency conversion, analog-to-digital conversion, demodulation and decoding; the indoor unit simultaneously performs ASK on the microwave terminal monitoring signal with a frequency of 5.5 MHz. Demodulation, obtaining microwave terminal monitoring data, and transmitting the obtained microwave terminal monitoring data to the monitoring unit inside the indoor unit.
  • the signal processing in the upstream direction is as follows:
  • the indoor unit in the microwave terminal modulates the original Ethernet data into a carrier signal with a frequency of 350 MHz, and the indoor unit also performs ASK modulation on the local microwave terminal monitoring data to obtain a microwave terminal monitoring signal with a frequency of 10 MHz.
  • the carrier signal with a frequency of 350 MHz is transmitted to the outdoor unit through the intermediate frequency cable together with the microwave terminal monitoring signal with a frequency of 10 MHz, and the outdoor unit performs up-conversion processing to obtain a microwave signal with a frequency of 15 GHz, and the outdoor unit transmits the microwave signal with a frequency of 15 GHz. After power amplification, it is transmitted through the microwave terminal antenna.
  • the remote antenna in the remote optical transceiver unit receives the signal from the microwave terminal antenna, and is isolated by the transceiver channel inside the duplexer, and then amplified by the low noise amplifier.
  • the unit converts it into a radio frequency signal with a frequency of 2 GHz, and the remote monitoring data of the controlled unit is modulated by a remote FSK modulation unit to become a remote monitoring signal with a frequency of 433 MHz; the RF signal with a frequency of 2 GHz and a frequency of 433 MHz
  • the laser in the remote laser/photodetector assembly is electrically/optically converted to obtain the optical signal of the optical carrier and transmitted to the optical wiring unit.
  • the combiner combines the optical RF signal with the PON optical signal sent by the PON ONU device via the ODN, and transmits it to the main office optical transceiver unit.
  • the central office multiplexer unit in the main office optical transceiver unit receives the optical signal from the combiner in the optical distribution unit, and decomposes the signal into optical signals of multiple wavelengths.
  • the PON port of the PON interface disk and the multiplexed optical transceiver unit of the central office are respectively sent to; the optical detector in the central laser/photodetector component performs optical/electrical conversion on the optical signal to obtain an electrical signal, and the compensation amplification unit pairs
  • the electrical signal is supplemented Compensating and amplifying processing, obtaining a mixed signal of a radio frequency signal with a frequency of 2 GHz and a central monitoring signal with a frequency of 433 MHz; a radio frequency signal with a frequency of 2 GHz and a central end monitoring with a frequency of 433 MHz in the mixed signal of the central office branching unit
  • the signal is separated, and the separated RF signal is down-regulated by the central end down-conversion unit to become an analog carrier signal with a frequency of 140 MHz
  • the analog carrier signal is converted into a baseband data by analog-to-digital conversion, code demodulation by a digital demodulation unit.
  • the signal is finally buffered by the level processing of the interface processing unit, and then enters the system backplane after the active/standby switching process; the FSK demodulation unit performs the FSK demodulation of the central office monitoring signal with the frequency of 433 MHz separated by the central office branching unit.
  • the uplink terminal monitoring data is obtained, and the central office monitoring data is output to the main control unit.

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Abstract

本发明公开了一种基于FTTH网络的光纤和无线混合接入系统及混合接入方法，涉及光纤接入领域，该混合接入系统包括GPON局端OLT设备和光配线单元，局端OLT设备通过光纤链路与光配线单元相连，该光纤链路同时传送数字基带信号和模拟无线信号，GPON局端OLT设备包括16个槽位，用于插PON接口盘和局端光载射频单元，当一个光纤链路方向有N个无线接入通道时，1≤N≤7，局端OLT设备使用N个局端光载射频单元，其中一个作为主用局端光载射频单元，其余N-1个作为级联用局端光载射频单元。本发明能复用PON的光纤资源，简化远端射频模块的设计，减小体积，降低功耗和成本，通过无线中继传送，使无线接入融入FTTH网络。

Description

说 明 书
基于 FTTH网络的光纤和无线混合接入系统及混合接入方法 技术领域
本发明涉及光纤接入领域，特别是涉及一种基于 FTTH (Fiber To The Home, 光纤到户） 网络的光纤和无线混合接入系统及混合接入方法。 背景技术
光纤接入从 FTTC (Fiber To The Curb, 光纤到路边）到 FTTB (Fiber To The Building, 光纤到楼）， 再到 FTTH (Fiber To The Home, 光纤到户）， 不断在向 用户驻地靠近。 FTTH基本成为新建小区的首选接入方式， 这种被赋予为终极解 决方案的接入方式， 既继承了光纤传输通信容量大、损耗小、抗电磁干扰能力强 的特点， 又因为其全程光链路都采用无源器件而兼具有布放简单、维护方便的特 点。 但是， 这种接入方式对于山地、 湖泊、 以及重要基础设施导致的光纤布防困 难的地方， 仍然存在一些覆盖盲区。
随着社会的发展， 无线通信也在快速发展， 无线接入从最初的宏基站、 到后 来的微基站 （Microcell), 再到微微基站 （Picocell) 和毫微微基站 （Femtocell) 等， 也是不断在向用户驻地延伸。无线通信的业务驱动重心从最初的语音通话正 向数据、 视频业务快速转移， 这种业务需求的变化导致基站建设呈现数量增加、 逐渐向用户靠近的趋势。由于无线传送技术与生俱来的大气和无线信号的衰减问 题， 要进一步提升用户业务数据速率， 就要求无线接入点离用户更近。
光纤接入是采用无源光网络器件及光纤布防，无线接入采用的是光纤连接的 基站及回传设备， 目前的光纤接入与无线接入存在重复建设、浪费光纤资源的问 题。 发明内容
本发明的目的是为了克服上述背景技术的不足， 提供一种基于 FTTH 网络 的光纤和无线混合接入系统及混合接入方法，不仅能够复用无源光网络中的光纤 资源， 而且能够简化远端射频模块的设计， 减小远端射频模块的体积， 降低远端 射频模块的功耗， 大幅降低运营商的建设成本， 为数量巨大且靠近用户的微微基 站布防创造条件，并在此基础上通过微波中继传送，解决光纤接入方式对于山地、 湖泊等地形复杂的地区、以及有既有重要基础设施导致的光纤布放困难地方的接 入盲区问题。
本发明提供一种基于 FTTH网络的光纤和无线混合接入系统，包括 GPON 局端 OLT设备和光配线单元， 局端 OLT设备通过光纤链路与光配线单元相连， 该光纤链路同时传送数字基带信号和模拟无线信号， GPON局端 OLT设备包括 16个槽位， 用于插 PON接口盘和局端光载射频单元， 当一个光纤链路方向有 N 个无线接入通道时， KN 7， 局端 OLT设备使用 N个局端光载射频单元， 其 中一个作为主用局端光载射频单元， 其余 N-1个作为级联用局端光载射频单元， 主用局端光载射频单元级联 PON接口盘中的一个 PON口，主用局端光载射频单 元通过光纤链路连接到光配线单元，级联用光载射频单元通过光跳线连接到主用 局端光载射频单元的面板上； 光配线单元包括 FTTH网络中的 ODN及合波器， ODN通过光纤与 PON ONU相连； 合波器通过光纤连接最多 7个远端光载射频 单元； 局端光载射频单元对子框内的背板侧接口主要是高速以太网接口， 主用局 端光载射频单元的外部接口是波分复用光接口，该波分复用光接口通过光配线单 元与远端光载射频单元相连；级联用局端光载射频单元的外部接口通过光跳线级 联到主用局端光载射频单元的面板上；远端光载射频单元的数量与局端光载射频 单元的数量相同，不同的远端光载射频单元使用不同的上下行波长进行射频光载 传送，每个远端光载射频单元通过无线微波信道连接一个微波终端，每个微波终 端通过以太网线与家庭网络相连， 其中：
级联用局端光载射频单元，用于：将 FTTH OLT设备背板侧的高速以太网数 据变换为在光纤上传输的射频信号， 不带局端合波单元，通过光跳线将该射频信 号级联到主用局端光载射频单元；
主用局端光载射频单元，用于：将 FTTH OLT设备背板侧的高速以太网数据 变换为在光纤上传输的射频信号， 带有局端合波单元， 局端合波单元用于级联 PON 口的光信号和级联用局端光载射频单元的光信号， 将多波长光信号复用到 一根光纤链路上送出；
ODN, 用于： 完成光纤链路的连接分配；
合波器， 用于： 完成多波长光纤链路与多个单波长光链路的转换； 远端光载射频单元，用于： 将光纤链路中承载的射频信号经过处理后通过其 内部的天线发送出去， 以及从其内部的天线接受无线信号， 经处理后送到光纤链 路上；
微波终端， 用于： 完成无线信号与以太网数据的转换；
PON 接口盘一主用局端光载射频单元一光纤链路一合波器一 ODN— PON 0NU这条链路完成光纤接入， 针对允许光纤布防的应用场景； 级联用局端光载 射频单元一主用局端光载射频单元一光纤链路一合波器一远端光载射频单元一 微波终端这条链路完成无线接入，针对不适合光纤布防的应用场合， 形成光纤和 无线混合接入系统。
在上述技术方案的基础上， 所述主用局端光载射频单元包括接口处理单 元、 数字调制单元、 局端上变频单元、 主控单元、 局端频移键控 FSK调制单元、 局端 FSK解调单元、局端合路单元、信号调整单元、局端激光器 /光探测器组件、 局端合波单元、补偿放大单元、局端分路单元、局端下变频单元和数字解调单元， 主控单元分别与局端 FSK调制单元、局端 FSK解调单元相连，局端 FSK调制单 元与局端合路单元相连， 局端 FSK解调单元与局端分路单元相连， 接口处理单 元与数字调制单元相连， 数字调制单元、 局端上变频单元、 局端合路单元、 信号 调整单元、 局端激光器 /光探测器组件、 局端合波单元依次相连， 同时局端激光 器 /光探测器组件、 补偿放大单元、 局端分路单元、 局端下变频单元和数字解调 单元依次相连， 数字解调单元还与接口处理单元相连， 其中：
主控单元， 用于： 产生局端监控数据；
局端 FSK调制单元， 用于： 完成局端监控数据的 FSK调制；
局端 FSK解调单元， 用于： 完成局端监控信号的 FSK解调；
接口处理单元， 用于： 完成局端信号背板接口处理；
数字调制单元， 用于： 完成数字信号的正交调制；
局端上变频单元， 用于： 向上调整局端信号的频率；
局端合路单元， 用于： 完成局端业务信号与局端监控信号的合并； 信号调整单元， 用于： 将下行信号调整到局端光调制单元的线性区域； 局端激光器 /光探测器组件中的激光器完成局端信号的电 /光变换， 该组件中 的光探测器完成局端信号的光 /电变换；
补偿放大单元， 用于： 完成上行信号的调整、 适配、 补偿；
局端分路单元， 用于： 完成局端业务信号与局端监控信号的分离； 局端下变频单元， 用于： 向下调整局端信号的频率；
数字解调单元， 用于： 完成数字信号的解调；
局端合波单元用于： 将 PON口光信号、 主用局端光载射频单元光信号、 以 及最多 6个级联用局端光载射频单元光信号进行合波处理；
所述级联用局端光载射频单元在主用局端光载射频单元的基础上减少了局 端合波单元， 其余各单元的作用及连接关系不变。
在上述技术方案的基础上，所述远端光载射频单元包括远端天线、双工器、 受控单元、 远端 FSK调制单元、 远端 FSK解调单元、 低噪声放大器、 远端下变 频单元、 远端合路单元、 远端光调制单元、 远端激光器 /光探测器组件、 远端分 路单元、 远端上变频单元、 功率放大器， 受控单元分别与远端 FSK调制单元、 远端 FSK解调单元相连，远端 FSK调制单元与远端合路单元相连，远端 FSK解 调单元与远端分路单元相连，远端天线与双工器相连，双工器与低噪声放大器相 连， 低噪声放大器、 远端下变频单元、 远端合路单元、 远端激光器 /光探测单元 组件依次相连， 远端激光器 /光探测单元组件还与远端分路单元、 远端上变频单 元、 功率放大器依次相连， 功率放大器与双工器相连， 其中：
远端天线， 用于： 完成微波信号的接收和发送；
双工器， 用于： 接收及发送信号， 通过一个天线完成收发；
受控单元， 用于： 管理远端监控数据；
远端 FSK调制单元， 用于： 完成远端监控数据的 FSK调制；
远端 FSK解调单元， 用于： 完成远端监控信号的 FSK解调；
低噪声放大器， 用于： 将从天线接收的信号进行低噪声放大；
远端下变频单元， 用于： 向下调整远端信号的频率；
远端合路单元， 用于： 完成远端业务信号与远端监控信号的合并； 远端激光器 /光探测器组件中的激光器完成远端信号的电 /光变换， 该组件中 的光探测器完成远端信号的光 /电变换；
远端分路单元， 用于： 完成远端业务信号与远端监控信号的分离； 远端上变频单元， 用于： 向上调整远端信号的频率；
功率放大器， 用于： 将微波信号进行功率放大。
在上述技术方案的基础上， 所述微波终端包括依次相连的微波终端天线、 室外单元和室内单元，室外单元一侧通过微波终端天线的无线信道与远端光载射 频单元相连， 室外单元另外一侧通过同轴电缆与室内单元相连， 室内单元通过以 太网线与家庭网络相连， 其中：
微波终端天线， 用于： 发送和接收微波信号；
室外单元， 用于： 完成微波信号与中频信号的转换；
室内单元， 用于： 完成中频信号与以太网数据的转换。
本发明还提供一种应用上述光纤和无线混合接入系统的基于 FTTH网络的 光纤和无线混合接入方法， 包括以下步骤：
下行方向的信号处理过程如下：
GPON局端 OLT设备背板上的基带数据信号经接口处理单元的电平缓冲保 护、 主备倒换处理后， 经过数字调制单元的数字压缩、 编码调制、 数模转换、 滤 波处理后成为频率为 350MHz的模拟载波信号，该信号经局端上变频单元上调频 率， 变成频率为 2GHz的射频信号； 主控单元的局端监控数据通过局端 FSK调 制单元进行 FSK调制， 得到频率为 433MHz的局端监控信号， 局端合路单元将 局端上变频单元输出的频率为 2GHz的射频信号和局端 FSK调制单元输出的频 率为 433MHz的局端监控信号进行合路处理，信号调整单元将合路后的信号调整 到局端激光器 /光探测器组件中的激光器的工作线性区域， 局端激光器 /光探测器 组件中的激光器对调整后的信号进行电 /光转换， 转换为光载射频信号； 级联用 局端光载射频单元通过光跳线将该信号级联到主用局端光载射频单元；主用局端 光载射频单元中的局端合波单元对该信号与原有 PON接口盘输出的光信号进行 合波，将不同波长的光信号复用到一根光纤上传送到光配线单元，光配线单元中 的合波器将 PON口光信号与光载射频信号分离， 其中 PON口光信号经 ODN传 送到 PON ONU设备， 而光载射频信号传送到远端光载射频单元；
远端光载射频单元中的远端激光器 /光探测器组件中的光探测器接收光配线 单元中的合波器发来的光载射频信号， 并对该信号进行光 /电变换， 得到电信号， 该电信号中含有频率为 2GHz的射频信号和频率为 433MHz的远端监控信号；远 端分路单元将该电信号中频率为 2GHz的射频信号与频率为 433MHz的远端监控 信号分离， 频率为 2GHz的射频信号经远端上变频单元上调频率后， 变成频率为 15GHz的射频信号， 该频率为 15GHz的射频信号经过功率放大器的射频滤波、 功率放大处理， 再经过双工器内部的收发通道的隔离处理后， 从远端天线发送出 去； 频率为 433MHz的远端监控信号经过远端 FSK解调单元的 FSK解调后得到 远端监控数据， 远端 FSK解调单元将得到的远端监控数据发送到受控单元； 微波终端中的微波终端天线接收远端光载射频单元发来的频率为 15GHz的 射频信号，室外单元对该信号进行下变频处理，得到频率为 140MHz的中频信号， 室外单元中的微波终端监控数据经过振幅键控 ASK调制为频率为 5.5MHz的微 波终端监控信号，室外单元将频率为 140MHz的中频信号和频率为 5.5MHz的微 波终端监控信号通过中频电缆输送到室内单元中， 室内单元再将频率为 140MHz 的中频信号经过变频、模数转换、解调解码变为原始以太网数据帧； 室内单元同 时对频率为 5.5MHz的微波终端监控信号进行 ASK解调， 得到微波终端监控数 据， 将得到的微波终端监控数据发送到室内单元内部的监控单元；
上行方向的信号处理过程如下：
微波终端中的室内单元将原始以太网数据调制为频率为 350MHz 的载波信 号， 室内单元同时还对微波终端监控数据进行 ASK调制， 得到频率为 10MHz 的微波终端监控信号， 将频率为 350MHz的载波信号与频率为 10MHz的微波终 端监控信号一起经过中频电缆传给室外单元， 室外单元进行上变频处理，得到频 率为 15GHz的微波信号， 室外单元对该频率为 15GHz的微波信号进行功率放大 后， 通过微波终端天线发射出去；
远端光载射频单元中的远端天线接收微波终端天线发来的信号，经过双工器 内部的收发通道的隔离处理后， 再经低噪声放大器放大，远端下变频单元将其变 为频率为 2GHz的射频信号， 同时受控单元的远端监控数据经过远端 FSK调制 单元调制， 变成频率为 433MHz的远端监控信号； 频率为 2GHz的射频信号和频 率为 433MHz的远端监控信号经过远端合路单元合并处理后， 再由远端激光器 / 光探测器组件中的激光器进行电 /光变换， 得到光载射频信号并发送到光配线单 元中的合波器，合波器将光载射频信号与 PON ONU设备经 ODN发来的 PON口 光信号进行合波， 传送到主用局端光载射频单元；
主用局端光载射频单元中的局端合波单元接收光配线单元中的合波器发来 的光信号， 并将该信号分解为多个波长的光信号， 分别送到 PON接口盘的 PON 口和级联用局端光载射频单元； 局端激光器 /光探测器组件中的光探测器对光信 号进行光 /电变换， 得到电信号， 补偿放大单元对该电信号进行补偿、 放大处理， 得到含有频率为 2GHz的射频信号和频率为 433MHz的局端监控信号的混合信 号；局端分路单元对混合信号中的频率为 2GHz的射频信号和频率为 433MHz的 局端监控信号进行分离， 分离出的射频信号经局端下变频单元下调频率，变成频 率为 140MHz的模拟载波信号， 该模拟载波信号经过数字解调单元的模数转换、 编码解调后， 成为基带数据信号， 最后经接口处理单元的电平缓冲保护、 主备倒 换处理后进入系统背板； 局端 FSK 解调单元对局端分路单元分离出的频率为 433MHz的局端监控信号进行 FSK解调， 得到上行的局端监控数据， 再将局端 监控数据输出到主控单元。
与现有技术相比， 本发明的优点如下：
本发明将光网络和无线网络完美结合， 充分利用各自的优点，在局端将基带 信号转换为射频信号， 不仅能够复用无源光网络中的光纤资源， 而且能够简化远 端射频模块的设计， 减小远端射频模块的体积， 降低远端射频模块的功耗， 大幅 降低运营商的建设成本， 为数量巨大且靠近用户的微微基站布防创造条件， 并在 此基础上通过无线中继传送，解决光纤接入方式对于山地、湖泊等地形复杂的地 区、 以及有既有重要基础设施导致的光纤布放困难地方的接入盲区问题，最终使 无线系统融入 OLT (Optical Line Terminal, 光线路终端） 中， 对光网络和无线网 络进行统一管理。 附图说明
图 1是本发明实施例中基于 FTTH网络的光纤和无线混合接入系统的结构框 图。
图 2是本发明实施例中 GPON局端 OLT设备中主用局端光载射频单元的结 构框图。
图 3是本发明实施例中 GPON局端 OLT设备中级联用局端光载射频单元的 结构框图。
图 4是本发明实施例中远端光载射频单元的结构框图。
图 5是本发明实施例中微波终端的结构框图。 具体实施方式
下面结合附图及具体实施例对本发明作进一步的详细描述。
参见图 1所示，本发明实施例提供一种基于 FTTH网络的光纤和无线混合接 入系统， 包括 GPON (Gigabit-Capable Passive Optical Network, 吉比特无源光网 络）局端 OLT设备和光配线单元， 局端 OLT设备通过光纤链路与光配线单元相 连， 该光纤链路同时传送数字基带信号和模拟无线信号。 GPON局端 OLT设备 包括 16个槽位， 用于插 PON (Passive Optical Network, 无源光网络） 接口盘和 局端光载射频单元， 当一个光纤链路方向有 N ( 1^N^7) 个无线接入通道时， 局端 OLT设备就需要使用 N个局端光载射频单元， 其中一个作为主用局端光载 射频单元，其余 N-1个作为级联用局端光载射频单元。主用局端光载射频单元还 可以级联 PON接口盘中的一个 PON口。图 1中仅画出了 2个局端光载射频单元 和 PON接口盘中的 1个 PON口，第一局端光载射频单元作为主用局端光载射频 单元，通过光纤链路连接到光配线单元，第二局端光载射频单元作为级联用光载 射频单元， 它通过光跳线连接到主用局端光载射频单元的面板上。
光配线单元包括 FTTH网络中的 ODN (Optical Distribution Network, 光分 配网）及合波器， 0DN通过光纤与 PON ONU (Optical Network Unit, 光网络单 元）相连； 合波器通过光纤可以连接最多 7个远端光载射频单元； 局端光载射频 单元对子框内的背板侧接口主要是高速以太网接口，主用局端光载射频单元的外 部接口是波分复用光接口，该波分复用光接口通过光配线单元与远端光载射频单 元相连；级联用局端光载射频单元的外部接口通过光跳线级联到主用局端光载射 频单元的面板上。远端光载射频单元的数量与局端光载射频单元的数量相同， 不 同的远端光载射频单元使用不同的上下行波长进行射频光载传送。每个远端光载 射频单元通过无线微波信道连接一个微波终端，每个微波终端通过以太网线与家 庭网络相连， 其中：
级联用局端光载射频单元，用于：将 FTTH 0LT设备背板侧的高速以太网数 据变换为在光纤上传输的射频信号， 不带局端合波单元，通过光跳线将该射频信 号级联到主用局端光载射频单元；
主用局端光载射频单元，用于：将 FTTH 0LT设备背板侧的高速以太网数据 变换为在光纤上传输的射频信号， 带有局端合波单元， 局端合波单元用于级联 PON 口的光信号和级联用局端光载射频单元的光信号， 将多波长光信号复用到 一根光纤链路上送出；
ODN, 用于： 完成光纤链路的连接分配；
合波器， 用于： 完成多波长光纤链路与多个单波长光链路的转换； 远端光载射频单元，用于： 将光纤链路中承载的射频信号经过处理后通过其 内部的天线发送出去， 以及从其内部的天线接受无线信号， 经处理后送到光纤链 路上；
微波终端， 用于： 完成无线信号与以太网数据的转换。
图 1中 PON接口盘一主用局端光载射频单元一光纤链路一合波器一 ODN— P0N 0NU这条链路完成光纤接入， 针对允许光纤布防的应用场景； 级联用局端 光载射频单元一主用局端光载射频单元一光纤链路一合波器一远端光载射频单 元一微波终端这条链路完成无线接入，针对不适合光纤布防的应用场合，这样就 形成了一种光纤和无线混合接入系统。
参见图 2所示， 主用局端光载射频单元包括接口处理单元、 数字调制单元、 局端上变频单元、 主控单元、 局端 FSK (Frequency Shift Keying, 频移键控） 调 制单元、 局端 FSK解调单元、 局端合路单元、 信号调整单元、 局端激光器 /光探 测器组件、 局端合波单元、 补偿放大单元、 局端分路单元、 局端下变频单元和数 字解调单元， 主控单元分别与局端 FSK调制单元、 局端 FSK解调单元相连， 局 端 FSK调制单元与局端合路单元相连，局端 FSK解调单元与局端分路单元相连， 接口处理单元与数字调制单元相连， 数字调制单元、局端上变频单元、局端合路 单元、 信号调整单元、 局端激光器 /光探测器组件、 局端合波单元依次相连， 同 时局端激光器 /光探测器组件、 补偿放大单元、 局端分路单元、 局端下变频单元 和数字解调单元依次相连， 数字解调单元还与接口处理单元相连， 其中：
主控单元， 用于： 产生局端监控数据；
局端 FSK调制单元， 用于： 完成局端监控数据的 FSK调制；
局端 FSK解调单元， 用于： 完成局端监控信号的 FSK解调；
接口处理单元， 用于： 完成局端信号背板接口处理；
数字调制单元， 用于： 完成数字信号的正交调制；
局端上变频单元， 用于： 向上调整局端信号的频率；
局端合路单元， 用于： 完成局端业务信号与局端监控信号的合并； 信号调整单元， 用于： 将下行信号调整到局端光调制单元的线性区域； 局端激光器 /光探测器组件中的激光器完成局端信号的电 /光变换， 该组件中 的光探测器完成局端信号的光 /电变换；
补偿放大单元， 用于： 完成上行信号的调整、 适配、 补偿；
局端分路单元， 用于： 完成局端业务信号与局端监控信号的分离； 局端下变频单元， 用于： 向下调整局端信号的频率；
数字解调单元， 用于： 完成数字信号的解调。
局端合波单元用于： 将 PON口光信号、 主用局端光载射频单元光信号、 以 及最多 6个级联用局端光载射频单元光信号进行合波处理。
参见图 3所示，级联用局端光载射频单元在主用局端光载射频单元的基础上 减少了局端合波单元， 其余各单元的作用及连接关系不变。
参见图 4所示， 远端光载射频单元包括远端天线、 双工器、 受控单元、远端 FSK调制单元、 远端 FSK解调单元、 低噪声放大器、 远端下变频单元、 远端合 路单元、 远端光调制单元、 远端激光器 /光探测器组件、 远端分路单元、 远端上 变频单元、 功率放大器， 受控单元分别与远端 FSK调制单元、 远端 FSK解调单 元相连， 远端 FSK调制单元与远端合路单元相连， 远端 FSK解调单元与远端分 路单元相连， 远端天线与双工器相连， 双工器与低噪声放大器相连， 低噪声放大 器、 远端下变频单元、 远端合路单元、 远端激光器 /光探测单元组件依次相连， 远端激光器 /光探测单元组件还与远端分路单元、 远端上变频单元、 功率放大器 依次相连， 功率放大器与双工器相连， 其中：
远端天线， 用于： 完成微波信号的接收和发送；
双工器， 用于： 接收及发送信号， 通过一个天线完成收发；
受控单元， 用于： 管理远端监控数据；
远端 FSK调制单元， 用于： 完成远端监控数据的 FSK调制；
远端 FSK解调单元， 用于： 完成远端监控信号的 FSK解调；
低噪声放大器， 用于： 将从天线接收的信号进行低噪声放大；
远端下变频单元， 用于： 向下调整远端信号的频率；
远端合路单元， 用于： 完成远端业务信号与远端监控信号的合并； 远端激光器 /光探测器组件中的激光器完成远端信号的电 /光变换， 该组件中 的光探测器完成远端信号的光 /电变换；
远端分路单元， 用于： 完成远端业务信号与远端监控信号的分离； 远端上变频单元， 用于： 向上调整远端信号的频率；
功率放大器， 用于： 将微波信号进行功率放大。
参见图 5所示，微波终端包括依次相连的微波终端天线、 ODU( Outdoor Unit, 室外单元） 和 IDU (Indoor Unit, 室内单元）， 室外单元一侧通过微波终端天线 的无线信道与远端光载射频单元相连，室外单元另外一侧通过同轴电缆与室内单 元相连， 室内单元通过以太网线与家庭网络相连， 其中：
微波终端天线， 用于： 发送和接收微波信号；
室外单元， 用于： 完成微波信号与中频信号的转换；
室内单元， 用于： 完成中频信号与以太网数据的转换。
在上述光纤和无线混合接入系统的基础上， 本发明实施例提供一种基于 FTTH网络的光纤和无线混合接入方法， 包括以下步骤：
下行方向的信号处理过程如下：
参见图 2所示， GPON局端 OLT设备背板上的基带数据信号经接口处理单 元的电平缓冲保护、主备倒换处理后，经过数字调制单元的数字压缩、编码调制、 数模转换、滤波处理后成为频率为 350MHz的模拟载波信号，该信号经局端上变 频单元上调频率， 变成频率为 2GHz的射频信号； 主控单元的局端监控数据通过 局端 FSK调制单元进行 FSK调制， 得到频率为 433MHz的局端监控信号， 局端 合路单元将局端上变频单元输出的频率为 2GHz的射频信号和局端 FSK调制单 元输出的频率为 433MHz的局端监控信号进行合路处理，信号调整单元将合路后 的信号调整到局端激光器 /光探测器组件中的激光器的工作线性区域， 局端激光 器 /光探测器组件中的激光器对调整后的信号进行电 /光转换， 转换为光载射频信 号。 级联用局端光载射频单元通过光跳线将该信号级联到主用局端光载射频单 元； 主用局端光载射频单元中的局端合波单元对该信号与原有 PON接口盘输出 的光信号进行合波， 将不同波长的光信号复用到一根光纤上传送到光配线单元， 光配线单元中的合波器将 PON口光信号与光载射频信号分离，其中 PON口光信 号经 ODN传送到 PON ONU设备， 而光载射频信号传送到远端光载射频单元。
参见图 4所示， 远端光载射频单元中的远端激光器 /光探测器组件中的光探 测器接收光配线单元中的合波器发来的光载射频信号， 并对该信号进行光 /电变 换， 得到电信号， 该电信号中含有频率为 2GHz的射频信号和频率为 433MHz的 远端监控信号； 远端分路单元将该电信号中频率为 2GHz 的射频信号与频率为 433MHz的远端监控信号分离， 频率为 2GHz的射频信号经远端上变频单元上调 频率后， 变成频率为 15GHz的射频信号， 该频率为 15GHz的射频信号经过功率 放大器的射频滤波、功率放大处理，再经过双工器内部的收发通道的隔离处理后， 从远端天线发送出去； 频率为 433MHz的远端监控信号经过远端 FSK解调单元 的 FSK解调后得到远端监控数据， 远端 FSK解调单元将得到的远端监控数据发 送到受控单元。
参见图 5所示，微波终端中的微波终端天线接收远端光载射频单元发来的频 率为 15GHz 的射频信号， 室外单元对该信号进行下变频处理， 得到频率为 140MHz的中频信号，室外单元中的微波终端监控数据经过 ASK( Amplitude Shift Keying, 振幅键控）调制为频率为 5.5MHz的微波终端监控信号， 室外单元将频 率为 140MHz的中频信号和频率为 5.5MHz的微波终端监控信号通过中频电缆输 送到室内单元中，室内单元再将频率为 140MHz的中频信号经过变频、模数转换、 解调解码变为原始以太网数据帧； 室内单元同时对频率为 5.5MHz的微波终端监 控信号进行 ASK解调， 得到微波终端监控数据， 将得到的微波终端监控数据发 送到室内单元内部的监控单元。
上行方向的信号处理过程如下：
参见图 5 所示， 微波终端中的室内单元将原始以太网数据调制为频率为 350MHz的载波信号， 室内单元同时还对本地微波终端监控数据进行 ASK调制， 得到频率为 10MHz的微波终端监控信号， 将频率为 350MHz的载波信号与频率 为 10MHz的微波终端监控信号一起经过中频电缆传给室外单元， 室外单元进行 上变频处理， 得到频率为 15GHz的微波信号， 室外单元对该频率为 15GHz的微 波信号进行功率放大后， 通过微波终端天线发射出去。
参见图 4所示，远端光载射频单元中的远端天线接收微波终端天线发来的信 号， 经过双工器内部的收发通道的隔离处理后， 再经低噪声放大器放大， 远端下 变频单元将其变为频率为 2GHz的射频信号， 同时受控单元的远端监控数据经过 远端 FSK调制单元调制， 变成频率为 433MHz的远端监控信号； 频率为 2GHz 的射频信号和频率为 433MHz的远端监控信号经过远端合路单元合并处理后，再 由远端激光器 /光探测器组件中的激光器进行电 /光变换， 得到光载射频信号并发 送到光配线单元中的合波器， 合波器将光载射频信号与 PON ONU设备经 ODN 发来的 PON口光信号进行合波， 传送到主用局端光载射频单元。
参见图 2所示，主用局端光载射频单元中的局端合波单元接收光配线单元中 的合波器发来的光信号， 并将该信号分解为多个波长的光信号， 分别送到 PON 接口盘的 PON口和级联用局端光载射频单元； 局端激光器 /光探测器组件中的光 探测器对光信号进行光 /电变换， 得到电信号， 补偿放大单元对该电信号进行补 偿、放大处理， 得到含有频率为 2GHz的射频信号和频率为 433MHz的局端监控 信号的混合信号；局端分路单元对混合信号中的频率为 2GHz的射频信号和频率 为 433MHz的局端监控信号进行分离，分离出的射频信号经局端下变频单元下调 频率，变成频率为 140MHz的模拟载波信号，该模拟载波信号经过数字解调单元 的模数转换、编码解调后， 成为基带数据信号， 最后经接口处理单元的电平缓冲 保护、 主备倒换处理后进入系统背板； 局端 FSK解调单元对局端分路单元分离 出的频率为 433MHz的局端监控信号进行 FSK解调，得到上行的局端监控数据， 再将局端监控数据输出到主控单元。
本领域的技术人员可以对本发明实施例进行各种修改和变型，倘若这些修改 和变型属在本发明权利要求及其等同技术的范围之内，则这些修改和变型也在本 发明的保护范围之内。
说明书中未详细描述的内容为本领域技术人员公知的现有技术。

Claims

权 利 要 求 书
1、 一种基于 FTTH网络的光纤和无线混合接入系统， 包括 GPON局端 OLT 设备和光配线单元， 其特征在于： 所述局端 OLT设备通过光纤链路与光配线单 元相连， 该光纤链路同时传送数字基带信号和模拟无线信号， GPON局端 OLT 设备包括 16个槽位，用于插 PON接口盘和局端光载射频单元， 当一个光纤链路 方向有 N个无线接入通道时， KN 7， 局端 OLT设备使用 N个局端光载射频 单元，其中一个作为主用局端光载射频单元，其余 N-1个作为级联用局端光载射 频单元， 主用局端光载射频单元级联 PON接口盘中的一个 PON口， 主用局端光 载射频单元通过光纤链路连接到光配线单元，级联用光载射频单元通过光跳线连 接到主用局端光载射频单元的面板上； 光配线单元包括 FTTH网络中的 ODN及 合波器， ODN通过光纤与 PON ONU相连； 合波器通过光纤连接最多 7个远端 光载射频单元； 局端光载射频单元对子框内的背板侧接口主要是高速以太网接 口， 主用局端光载射频单元的外部接口是波分复用光接口， 该波分复用光接口通 过光配线单元与远端光载射频单元相连；级联用局端光载射频单元的外部接口通 过光跳线级联到主用局端光载射频单元的面板上；远端光载射频单元的数量与局 端光载射频单元的数量相同，不同的远端光载射频单元使用不同的上下行波长进 行射频光载传送， 每个远端光载射频单元通过无线微波信道连接一个微波终端， 每个微波终端通过以太网线与家庭网络相连， 其中：
级联用局端光载射频单元，用于：将 FTTH OLT设备背板侧的高速以太网数 据变换为在光纤上传输的射频信号， 不带局端合波单元，通过光跳线将该射频信 号级联到主用局端光载射频单元；
主用局端光载射频单元，用于：将 FTTH OLT设备背板侧的高速以太网数据 变换为在光纤上传输的射频信号， 带有局端合波单元， 局端合波单元用于级联 PON 口的光信号和级联用局端光载射频单元的光信号， 将多波长光信号复用到 一根光纤链路上送出；
ODN, 用于： 完成光纤链路的连接分配；
合波器， 用于： 完成多波长光纤链路与多个单波长光链路的转换； 远端光载射频单元，用于： 将光纤链路中承载的射频信号经过处理后通过其 内部的天线发送出去， 以及从其内部的天线接受无线信号， 经处理后送到光纤链 路上；
微波终端， 用于： 完成无线信号与以太网数据的转换；
PON 接口盘一主用局端光载射频单元一光纤链路一合波器一 ODN— PON 0NU这条链路完成光纤接入， 针对允许光纤布防的应用场景； 级联用局端光载 射频单元一主用局端光载射频单元一光纤链路一合波器一远端光载射频单元一 微波终端这条链路完成无线接入，针对不适合光纤布防的应用场合， 形成光纤和 无线混合接入系统。
2、 如权利要求 1所述的基于 FTTH网络的光纤和无线混合接入系统， 其特 征在于： 所述主用局端光载射频单元包括接口处理单元、数字调制单元、局端上 变频单元、 主控单元、 局端频移键控 FSK调制单元、 局端 FSK解调单元、 局端 合路单元、 信号调整单元、 局端激光器 /光探测器组件、 局端合波单元、 补偿放 大单元、局端分路单元、局端下变频单元和数字解调单元， 主控单元分别与局端 FSK调制单元、 局端 FSK解调单元相连， 局端 FSK调制单元与局端合路单元相 连， 局端 FSK解调单元与局端分路单元相连， 接口处理单元与数字调制单元相 连， 数字调制单元、 局端上变频单元、 局端合路单元、 信号调整单元、 局端激光 器 /光探测器组件、 局端合波单元依次相连， 同时局端激光器 /光探测器组件、 补 偿放大单元、局端分路单元、局端下变频单元和数字解调单元依次相连， 数字解 调单元还与接口处理单元相连， 其中：
主控单元， 用于： 产生局端监控数据信号；
局端 FSK调制单元， 用于： 完成局端监控数据的 FSK调制；
局端 FSK解调单元， 用于： 完成局端监控信号的 FSK解调；
接口处理单元， 用于： 完成局端信号背板接口处理；
数字调制单元， 用于： 完成数字信号的正交调制；
局端上变频单元， 用于： 向上调整局端信号的频率；
局端合路单元， 用于： 完成局端业务信号与局端监控信号的合并； 信号调整单元， 用于： 将下行信号调整到局端光调制单元的线性区域； 局端激光器 /光探测器组件中的激光器完成局端信号的电 /光变换， 该组件中 的光探测器完成局端信号的光 /电变换；
补偿放大单元， 用于： 完成上行信号的调整、 适配、 补偿；
局端分路单元， 用于： 完成局端业务信号与局端监控信号的分离； 局端下变频单元， 用于： 向下调整局端信号的频率；
数字解调单元， 用于： 完成数字信号的解调；
局端合波单元用于： 将 PON口光信号、 主用局端光载射频单元光信号、 以 及最多 6个级联用局端光载射频单元光信号进行合波处理；
所述级联用局端光载射频单元在主用局端光载射频单元的基础上减少了局 端合波单元， 其余各单元的作用及连接关系不变。
3、 如权利要求 2所述的基于 FTTH网络的光纤和无线混合接入系统， 其特 征在于： 所述远端光载射频单元包括远端天线、 双工器、 受控单元、 远端 FSK 调制单元、 远端 FSK解调单元、 低噪声放大器、 远端下变频单元、 远端合路单 元、 远端光调制单元、 远端激光器 /光探测器组件、 远端分路单元、 远端上变频 单元、 功率放大器， 受控单元分别与远端 FSK调制单元、 远端 FSK解调单元相 连， 远端 FSK调制单元与远端合路单元相连， 远端 FSK解调单元与远端分路单 元相连， 远端天线与双工器相连， 双工器与低噪声放大器相连， 低噪声放大器、 远端下变频单元、 远端合路单元、 远端激光器 /光探测单元组件依次相连， 远端 激光器 /光探测单元组件还与远端分路单元、 远端上变频单元、 功率放大器依次 相连， 功率放大器与双工器相连， 其中：
远端天线， 用于： 完成微波信号的接收和发送；
双工器， 用于： 接收及发送信号， 通过一个天线完成收发；
受控单元， 用于： 管理远端监控数据；
远端 FSK调制单元， 用于： 完成远端监控数据的 FSK调制；
远端 FSK解调单元， 用于： 完成远端监控信号的 FSK解调；
低噪声放大器， 用于： 将从天线接收的信号进行低噪声放大；
远端下变频单元， 用于： 向下调整远端信号的频率；
远端合路单元， 用于： 完成远端业务信号与远端监控信号的合并； 远端激光器 /光探测器组件中的激光器完成远端信号的电 /光变换， 该组件中 的光探测器完成远端信号的光 /电变换；
远端分路单元， 用于： 完成远端业务信号与远端监控信号的分离； 远端上变频单元， 用于： 向上调整远端信号的频率；
功率放大器， 用于： 将微波信号进行功率放大。
4、 如权利要求 3所述的基于 FTTH网络的光纤和无线混合接入系统， 其特 征在于： 所述微波终端包括依次相连的微波终端天线、室外单元和室内单元， 室 外单元一侧通过微波终端天线的无线信道与远端光载射频单元相连，室外单元另 外一侧通过同轴电缆与室内单元相连， 室内单元通过以太网线与家庭网络相连， 其中：
微波终端天线， 用于： 发送和接收微波信号；
室外单元， 用于： 完成微波信号与中频信号的转换；
室内单元， 用于： 完成中频信号与以太网数据的转换。
5、 应用权利要求 4所述光纤和无线混合接入系统的基于 FTTH网络的光 纤和无线混合接入方法， 其特征在于， 包括以下步骤：
下行方向的信号处理过程如下：
GPON局端 OLT设备背板上的基带数据信号经接口处理单元的电平缓冲保 护、 主备倒换处理后， 经过数字调制单元的数字压缩、 编码调制、 数模转换、 滤 波处理后成为频率为 350MHz的模拟载波信号，该信号经局端上变频单元上调频 率， 变成频率为 2GHz的射频信号； 主控单元的局端监控数据通过局端 FSK调 制单元进行 FSK调制， 得到频率为 433MHz的局端监控信号， 局端合路单元将 局端上变频单元输出的频率为 2GHz的射频信号和局端 FSK调制单元输出的频 率为 433MHz的局端监控信号进行合路处理，信号调整单元将合路后的信号调整 到局端激光器 /光探测器组件中的激光器的工作线性区域， 局端激光器 /光探测器 组件中的激光器对调整后的信号进行电 /光转换， 转换为光载射频信号； 级联用 局端光载射频单元通过光跳线将该信号级联到主用局端光载射频单元；主用局端 光载射频单元中的局端合波单元对该信号与原有 PON接口盘输出的光信号进行 合波，将不同波长的光信号复用到一根光纤上传送到光配线单元，光配线单元中 的合波器将 PON口光信号与光载射频信号分离， 其中 PON口光信号经 ODN传 送到 PON ONU设备， 而光载射频信号传送到远端光载射频单元；
远端光载射频单元中的远端激光器 /光探测器组件中的光探测器接收光配线 单元中的合波器发来的光载射频信号， 并对该信号进行光 /电变换， 得到电信号， 该电信号中含有频率为 2GHz的射频信号和频率为 433MHz的远端监控信号；远 端分路单元将该电信号中频率为 2GHz的射频信号与频率为 433MHz的远端监控 信号分离， 频率为 2GHz的射频信号经远端上变频单元上调频率后， 变成频率为 15GHz的射频信号， 该频率为 15GHz的射频信号经过功率放大器的射频滤波、 功率放大处理， 再经过双工器内部的收发通道的隔离处理后， 从远端天线发送出 去； 频率为 433MHz的远端监控信号经过远端 FSK解调单元的 FSK解调后得到 远端监控数据， 远端 FSK解调单元将得到的远端监控数据发送到受控单元； 微波终端中的微波终端天线接收远端光载射频单元发来的频率为 15GHz的 射频信号，室外单元对该信号进行下变频处理，得到频率为 140MHz的中频信号， 室外单元中的微波终端监控数据经过振幅键控 ASK调制为频率为 5.5MHz的微 波终端监控信号，室外单元将频率为 140MHz的中频信号和频率为 5.5MHz的微 波终端监控信号通过中频电缆输送到室内单元中， 室内单元再将频率为 140MHz 的中频信号经过变频、模数转换、解调解码变为原始以太网数据帧； 室内单元同 时对频率为 5.5MHz的微波终端监控信号进行 ASK解调， 得到微波终端监控数 据， 将得到的微波终端监控数据发送到室内单元内部的监控单元；
上行方向的信号处理过程如下：
微波终端中的室内单元将原始以太网数据调制为频率为 350MHz 的载波信 号， 室内单元同时还对微波终端监控数据进行 ASK调制， 得到频率为 10MHz 的微波终端监控信号， 将频率为 350MHz的载波信号与频率为 10MHz的微波终 端监控信号一起经过中频电缆传给室外单元， 室外单元进行上变频处理，得到频 率为 15GHz的微波信号， 室外单元对该频率为 15GHz的微波信号进行功率放大 后， 通过微波终端天线发射出去；
远端光载射频单元中的远端天线接收微波终端天线发来的信号，经过双工器 内部的收发通道的隔离处理后， 再经低噪声放大器放大，远端下变频单元将其变 为频率为 2GHz的射频信号， 同时受控单元的远端监控数据经过远端 FSK调制 单元调制， 变成频率为 433MHz的远端监控信号； 频率为 2GHz的射频信号和频 率为 433MHz的远端监控信号经过远端合路单元合并处理后， 再由远端激光器 / 光探测器组件中的激光器进行电 /光变换， 得到光载射频信号并发送到光配线单 元中的合波器，合波器将光载射频信号与 PON ONU设备经 ODN发来的 PON口 光信号进行合波， 传送到主用局端光载射频单元；
主用局端光载射频单元中的局端合波单元接收光配线单元中的合波器发来 的光信号， 并将该信号分解为多个波长的光信号， 分别送到 PON接口盘的 PON 口和级联用局端光载射频单元； 局端激光器 /光探测器组件中的光探测器对光信 号进行光 /电变换， 得到电信号， 补偿放大单元对该电信号进行补偿、 放大处理， 得到含有频率为 2GHz的射频信号和频率为 433MHz的局端监控信号的混合信 号；局端分路单元对混合信号中的频率为 2GHz的射频信号和频率为 433MHz的 局端监控信号进行分离， 分离出的射频信号经局端下变频单元下调频率，变成频 率为 140MHz的模拟载波信号， 该模拟载波信号经过数字解调单元的模数转换、 编码解调后， 成为基带数据信号， 最后经接口处理单元的电平缓冲保护、 主备倒 换处理后进入系统背板； 局端 FSK 解调单元对局端分路单元分离出的频率为 433MHz的局端监控信号进行 FSK解调， 得到上行的局端监控数据， 再将局端 监控数据输出到主控单元。
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