CN201315588Y - ONU device for realizing EPON and wireless incorporation access - Google Patents

Abstract

A user-end ONU device that realizes integrated access of various wired and wireless technologies. It includes a cabinet with multiple slots inside, an optical transceiver module fixed on the slots of the cabinet, a frequency multiplexing/demultiplexing module, and an optional pluggable EPON data processing card DSL processing card and EoC processing card , RF signal processing card and other components. For areas with existing home line resources, broadband access is mainly carried out through EPON networks, using technologies such as DSL, EoC and LAN. For areas without access line resources, complex terrain, or areas where the number of access users is too small to meet the cost of wired laying, WiMAX or WiFi wireless transmission technology is used for broadband access. Wireless access technology can also be used as an emergency communication method for wired access, and realize seamless coverage of the entire access area. The utility model makes the two broadband access modes of optical fiber and wireless complement each other in advantages, and fully utilizes the existing access line resources to achieve maximum coverage and optimal access efficiency. Users can choose various wired or wireless technologies for broadband access according to actual conditions.

Description

An ONU device realizing EPON and wireless integrated access

1. Technical field

The utility model relates to a processing method for wired and wireless integrated access, in particular to a user end ONU device for realizing integrated access of technologies such as EPON, WiMAX, and WiFi.

2. Background technology

Optical fiber access and wireless access are two cutting-edge technologies in existing broadband access technologies. The Ethernet Passive Optical Network (EPON) technology can provide 1.25Gbit/s access for users within a range of 20km bandwidth. In addition, based on different home line resources, there are different wired home technologies such as LAN, EoC (Ethernetover Cable), and DSL (Digital Subscriber Line). In terms of wireless access, WiMAX (World Interoperability for Microwave Access) is a wireless metropolitan area network access technology that can provide users within several kilometers with a wireless access bandwidth of 70Mbit/s. WiFi (Wireless Fidelity) is a wireless local area network technology that provides users with 11Mbit/s wireless access within a range of 100 meters. Existing manufacturers are all focused on one of the solutions, unable to provide users with a complete solution.

3. Contents of the invention

The utility model provides a user end ONU device which realizes wired and wireless integrated access. In order to achieve this purpose, the utility model adopts the following technical scheme, the ONU equipment includes a cabinet with a plurality of slots, an optical transceiver module fixed on the slots of the cabinet, a frequency multiplexing/demultiplexing module, and according to For specific access methods, pluggable EPON data processing cards, DSL processing cards, LAN processing cards, EoC processing cards, RF signal processing cards and other components can be selected.

In the EPON front-end OLT, the frequency division multiplexing method is used to complete the multiplexing of the 1.25Gbit/s digital baseband signal based on the EPON transmission protocol and the radio frequency signal based on WiMAX and WiFi standards, and the subcarrier modulation method is used to carry it to the OLT equipment 1550nm downstream wavelength.

In the ONU system of the utility model, the optical transceiver module completes the photoelectric conversion of the downlink electrical signal, sends the electrical signal to the frequency multiplexing/demultiplexing module for further processing, and performs the electro-optical conversion of the uplink signal, and uses the optical fiber for uplink transmission. The frequency multiplexing/demultiplexing module completes the frequency multiplexing of uplink transmission signals and the demultiplexing of downlink receiving signals. The EPON data processing card is responsible for the processing and sending of uplink/downlink Ethernet frames. The RF signal processing card is responsible for completing the data processing of two wireless access technologies, WiMAX and WiFi.

WiMAX, WiFi wireless access base stations and the ONU of the utility model can be integrated together to reduce equipment cost and complexity of network management. Select different wireless access methods according to different locations of the ONU. For areas where fiber-to-the-building (FTTB) is implemented, WiFi wireless access technology can be used. And for fiber to the curb (FTTC) or fiber to the premise network (FTTP) areas, it is suitable to use WiMAX wireless access. In addition, ONU can also adopt technologies such as DSL or EoC, and make full use of existing resources such as telephone and cable TV. At this time, wireless access methods such as WiMAX and WiFi can be used as emergency communication for wired access and seamless coverage in the access area.

The utility model can provide high-speed broadband access for all users within a range of 20km, so that EPON, WiMAX, WiFi and other broadband access methods complement each other to achieve the largest user coverage and optimal access efficiency. Users can choose various wired access based on EPON or WiMAX, WiFi and other technologies for wireless broadband access according to the actual situation.

4. Description of drawings:

Figure 1 is a schematic diagram of a user-side ONU device that realizes EPON and wireless converged access.

Fig. 2 is a schematic diagram of frequency division multiplexing based on subcarriers.

Fig. 3 is a schematic diagram of the application of the ONU device in the network to realize wired and wireless integrated access.

5. Specific implementation

As shown in Figure 1, an ONU device that realizes the integrated access of wired technology based on EPON and wireless technologies such as WiMAX and WiFi. The device is equipped with multiple slots, as well as optical transceiver modules and frequency Multiplexing/demultiplexing module, and EPON data processing card DSL processing card, LAN processing card, EoC processing card, radio frequency signal processing card and other components that can be plugged in according to the specific access mode.

In the ONU device, the optical transceiver module completes the photoelectric conversion of the downlink electrical signal, sends the electrical signal to the frequency multiplexing/demultiplexing module for further processing, and performs the electro-optical conversion of the uplink signal, and uses the optical fiber for uplink transmission. The frequency multiplexing/demultiplexing module completes the frequency multiplexing of uplink transmission signals and the demultiplexing of downlink receiving signals. The EPON data processing card is responsible for the processing and sending of uplink/downlink Ethernet frames. The RF signal processing card is responsible for completing the data processing of two wireless access technologies, WiMAX and WiFi.

WiMAX, WiFi wireless access base station and ONU can be integrated together to reduce equipment cost and complexity of network management. Select different wireless access methods according to different locations of the ONU. For areas where fiber-to-the-building (FTTB) is implemented, WiFi wireless access technology can be used. And for fiber to the curb (FTTC) or fiber to the premise network (FTTP) areas, it is suitable to use WiMAX wireless access. For the wired access mode, the ONU uses the LAN technology through the LAN processing card to complete the access of EPON data. ONU can also adopt technologies such as DSL or EOC, and make full use of existing telephone and cable TV and other home line resources. At this time, the wireless access method can be used as emergency communication for wired access and realize seamless coverage of the access area.

As shown in Figure 2, at the OLT, frequency division multiplexing of subcarriers is used to complete the multiplexing of digital baseband signals based on EPON frames and WiMAX and WiFi radio frequency signals. The OLT allocates corresponding time slots for each ONU it manages, and uses time-division multiplexing to complete the sending of EPON frames belonging to each ONU, with a total rate of 1.25Gbit/s. In addition, the OLT allocates specific frequency bands in the subcarriers for each managed WiMAX and WiFi wireless base station integrated with the ONU.

As shown in Figure 3, the OLT device is at the access point of the MAN in the entire network, and provides two access modes of EPON and wireless at the same time. For users based on wired access, at the ONU on the user side, filter the digital baseband signal in the subcarrier, that is, the EPON frame, and then use the Ethernet protocol to filter out specific EPON frames belonging to a specific ONU. Afterwards, use LAN technology to perform service access through Category 5 lines, use EoC (Ethernetover Cable) technology to perform service access through cable TV coaxial cable resources, or use DSL technology to perform service access through telephone lines.

For WiMAX and WiFi wireless access, the ONU first completes the photoelectric conversion of the signal, and then uses the frequency demultiplexer to complete the filtering of the specific radio frequency band belonging to the ONU, and then uses the frequency converter in the radio frequency processing card to convert the signal to WiMAX or The frequency for wireless transmission of WiFi base stations to complete wireless access of various services.

Claims (4)

1. An ONU device for realizing EPON and wireless fusion access, characterized in that the device includes an optical transceiver module fixed on the slot, a frequency multiplexing/demultiplexing module, an EPON data processing card, a DSL processing card, a LAN Processing card, EoC processing card, radio frequency signal processing card, the optical transceiver module completes the photoelectric conversion of the downlink optical signal, sends the electrical signal to the frequency multiplexing/demultiplexing module for further processing, and the electro-optical conversion of the uplink electrical signal, using 1310nm The wavelength is used for uplink transmission, the frequency multiplexing/demultiplexing module completes the frequency multiplexing of uplink signals and the demultiplexing of downlink received signals, the EPON data processing card is responsible for processing and sending uplink/downlink Ethernet frames, and the RF signal processing card is responsible for completing WiMAX For data processing of two wireless access technologies, EPON and WiFi, the output signal of the EPON data processing card can be selected according to the specific geographical location of the ONU and the existing home line resources, and the DSL processing card, EoC processing card and LAN processing card can be selected to complete the corresponding Service access based on telephone line, coaxial cable and local area network. 2. An ONU device for realizing EPON and wireless integrated access according to claim 1, characterized in that for downlink services, the ONU completes the photoelectric conversion of downlink signals, obtains digital baseband signals through frequency filtering, and filters out the For the EPON frame of the ONU, for WiMAX and WiFi wireless access, the frequency demultiplexing module also filters out the specific frequency band signal assigned by the OLT to the ONU, and uses the frequency converter in the RF signal processing card to obtain the WiMAX, WiFi base station and terminal connection. The frequency with which users communicate. 3. An ONU device for realizing EPON and wireless integrated access according to claim 1, characterized in that for various uplink services of wired access, the ONU encapsulates it into an EPON frame, according to the time slot allocated by the OLT It is carried in the form of baseband signal and sent on 1310nm wavelength. For the uplink signal of wireless access, the RF signal processing card in ONU converts it according to the specific frequency band allocated by OLT, and modulates the 1310nm wavelength of the optical transceiver module in the form of subcarrier. , for uplink transmission. Also, the frequency demultiplexing module filters out the specific frequency band signal assigned by the OLT to the ONU, and uses the frequency converter in the radio frequency processing card to obtain the frequency for communication between WiMAX, WiFi base stations and terminal access users. 6. An ONU device for realizing EPON and wireless integrated access according to claim 1, characterized in that for various uplink services of wired access, the ONU encapsulates it into an EPON frame, according to the time slot allocated by the OLT It is transmitted in the form of a baseband signal on a wavelength of 1310nm. For the uplink signal of wireless access, the radio frequency processing card in the ONU performs frequency conversion according to the specific frequency band allocated by the OLT, and modulates the 1310nm wavelength of the optical transceiver module in the form of a subcarrier. for uplink transmission.

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