CN209767542U - Split type optical modem system - Google Patents

Abstract

A split optical modem system is provided, wherein a plurality of optical modem units are arranged in a corridor, connected with an optical line terminal through optical fibers and used for receiving and transmitting downlink data signals and uplink data signals; the plurality of transfer units are respectively arranged in each user family, are connected with the optical modem units in a one-to-one correspondence mode through network cables, and are used for receiving corresponding downlink data signals, wirelessly transmitting the downlink data signals to the terminal equipment, receiving uplink data signals sent by the terminal equipment, sending the uplink data signals to the corresponding optical modem units, and coupling the direct current signals into the network cables and transmitting the direct current signals to the optical modem units. The split optical modem system has the advantages that the existing network cable is used for connecting the optical modem unit and the transfer unit, so that network optical communication is realized, the operation and maintenance cost is greatly saved while the optical fiber internet service is provided for users, the transfer unit reversely supplies power to the optical modem unit through coupling of the direct current signal on the network cable, the optical modem unit does not need an external power supply, and the circuit is simplified.

Description

Split type optical modem system

Technical Field

The utility model belongs to the technical field of the optical communication, especially, relate to a split type light cat system.

Background

at present, the traditional network communication mode is to perform electric communication through a network cable. With the progress of science and technology, the traditional internet access mode of narrow-band copper cables cannot meet the communication requirement, and the optical fiber communication, as a new optical communication technology, has the advantages of large communication capacity, strong confidentiality, small attenuation, long transmission distance and the like, so that the copper light-back is an inevitable trend. However, at present, optical fiber access is not completely popularized, network cables already cover large areas in various old cities, most of the network cables are embedded in the wall channels of buildings, and if the network cables are dismantled and optical fibers are laid again, the engineering is huge, and the operation and maintenance cost is high.

Therefore, the traditional electric communication technical scheme cannot meet the communication requirement of a user, and the scheme of dismantling the network cable and re-laying the optical fiber has the problems of complex engineering and high operation and maintenance cost.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides a split type optical modem system, aim at solving traditional telecommunication technical scheme and can't satisfy user's communication demand, and the scheme of demolising the net twine and laying optic fibre again has the problem that the engineering is complicated, the operation and maintenance cost is high.

The embodiment of the utility model provides a split type optical modem system, including set up in the corridor, carry out communication connection through optic fibre and light line terminal, a plurality of optical modem units for receiving and dispatching uplink data signal and downlink data signal; and

The system comprises a plurality of optical modem units and a plurality of transfer units, wherein the optical modem units are respectively arranged in each user family, are respectively connected with the optical modem units in a one-to-one correspondence manner through network cables, and are used for receiving corresponding downlink data signals, transmitting the downlink data signals to terminal equipment in a wireless manner, receiving uplink data signals sent by the terminal equipment, transmitting the uplink data signals to the corresponding optical modem units, and coupling direct current signals to the network cables and transmitting the direct current signals to the optical modem units so as to supply power to the optical modem units.

The split optical modem system utilizes the existing network cable to connect the optical modem unit and the transfer unit, thereby realizing network optical communication, reasonably utilizing the existing network cable resource, greatly saving operation and maintenance cost while providing optical fiber internet service for users, and reversely supplying power to the optical modem unit by the transfer unit through coupling a direct current signal on the network cable, wherein the optical modem unit does not need an external power supply, and the circuit is simplified.

Drawings

in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a split optical modem system according to an embodiment of the present invention;

Fig. 2 is a schematic circuit diagram of an optical modem unit in the split optical modem system shown in fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, a schematic structural diagram of a split-type optical modem system according to an embodiment of the present invention is shown, for convenience of illustration, only the parts related to the embodiment are shown, and detailed descriptions are as follows:

A split type optical modem system comprises a plurality of optical modem units 10 and a plurality of relay units 20.

The plurality of optical modem units 10 are disposed in the corridor, are in communication connection with the optical line terminal 30 through optical fibers Fi, and are configured to receive and transmit uplink data signals and downlink data signals.

The plurality of relay units 20 are respectively disposed in each user home, are respectively connected to the plurality of optical modem units 10 in a one-to-one correspondence manner through network cables Wi, and are configured to receive corresponding downlink data signals and wirelessly transmit the downlink data signals to the terminal device, receive uplink data signals sent by the terminal device and transmit the uplink data signals to the corresponding optical modem units 10, and couple direct-current electrical signals to the network cables Wi and transmit the direct-current electrical signals to the optical modem units 10 to power the optical modem units 10.

specifically, the optical line terminal 30 outputs the downlink data signal, the downlink data signal is transmitted to the plurality of optical modem units 10 through the optical fiber Fi, each optical modem unit 10 receives the same downlink data signal, the optical modem units 10 identify and distinguish the downlink data signal belonging to themselves and the downlink data signal not belonging to themselves through Gemport ID (frame number identification verification), filter the downlink data signal not belonging to themselves, and transmit the downlink data signal belonging to themselves to the relay unit 20 through the network cable Wi.

Direct current signals are coupled into a network cable Wi, and Power is reversely supplied to the optical modem unit 10 through the network cable Wi from the transfer unit 20, so that the optical modem unit 10 is powered, the design of a Power Over Ethernet (POE) protocol between the optical modem unit 10 and the transfer unit 20 is omitted, a Power supply or a Power interface is not required to be additionally arranged in a corridor to realize the Power supply of the optical modem unit 10, and the cost is greatly saved while the circuit is simplified.

The plurality of light cat units 10 are connected with the plurality of relay units 20 in a one-to-one correspondence manner, the number of the light cat units 10 is determined according to the number of the relay units 20, and the same number of light cat units 10 are correspondingly arranged in the corridor according to the number of the relay units 20 in each family, so that waste is avoided. All the light cat units 10 in a building are placed centrally in the corridor.

According to the split type optical modem system, the existing network cable Wi is used for connecting the optical modem unit 10 and the transfer unit 20, so that network optical communication is achieved, existing network cable Wi resources are reasonably utilized, and the operation and maintenance cost is greatly saved while the optical fiber Fi internet access service is provided for users. Moreover, direct current signals are coupled to the network cable Wi, the relay unit 20 reversely supplies power to the optical modem unit 10, the optical modem unit 10 does not need an external power supply, and the circuit is simplified. The optical modem unit 10 and the transfer unit 20 are respectively arranged in a corridor and a user home and are connected through the network cable Wi, the optical modem unit 10 does not need to be installed in the user home, the project of detaching the existing network cable Wi in a building wall and re-erecting the optical fiber Fi is saved, and the operation and maintenance cost is greatly reduced.

In an alternative embodiment, the plurality of optical modem units 10 are implemented by SFUs (Single Family Unit), and fig. 1 shows the plurality of optical modem units 10 as SFU1, SFU2, SFU3, SFU4, and the like.

the SFU has only one GE interface (Gigabit Ethernet interface), and the GE interface is connected to the relay unit 20 through a network cable Wi, and is configured to transmit a downlink data signal to the relay unit 20, receive an uplink data signal transmitted by the relay unit 20, and receive a dc signal coupled to the network cable Wi. The full service power consumption P of the SFU of the single GE interface is not more than 2 w.

In an optional embodiment, the transit unit 20 is implemented by a router, and a WAN port (a network wire Wi connection port) of the router is connected to a GE interface of the SFU through a network wire Wi.

fig. 1 shows a plurality of relay units 20 as RT1, RT2, RT3, RT4, and the like, respectively, and the relay units 20 are separately provided in each user home (for example, RT1 is provided in home 1, and RT2 is provided in home 2). The router transmits the received downlink data signals to the terminal devices (for example, terminal device 1 and terminal device 2) in a wireless transmission manner, and transmits the uplink data signals sent by the terminal devices to the corresponding SFU, and the SFU transmits the uplink data signals to the optical line terminal 30 through the optical fiber Fi. Terminal devices within the service area of the router may each be wirelessly connected to the router. Terminal devices include, but are not limited to, mobile handsets, personal computers, game consoles or television set-top boxes.

In an alternative embodiment, the dc signal is a 12V dc voltage signal. By deduction, when the SFU is used in cooperation with the router through the network cable Wi, the internal resistance of the network cable Wi cannot exceed 36/P, wherein P is the full service power consumption of the SFU. The specific derivation process is as follows:

The router, the network cable Wi and the SFU form a closed power supply loop together, and the closed power supply loop meets a KVL equation (kirchhoff voltage law).

Setting P: full service power consumption of SFU, U: after the internal resistance of the network cable Wi is consumed, the actual value of the direct current voltage signal received by the SFU, r: internal resistance of the network wire Wi. According to the KVL equation, there are:

If the equation has positive solution, the internal resistance of the network cable Wi must satisfy r less than or equal to 36/P.

In an optional embodiment, the network cable Wi is implemented by any one of a category 5 network cable, a category 5 super network cable, a category 6 super network cable or a category 7 network cable, and the network cables have the advantages of small internal resistance and high transmission rate compared with other types of network cables.

In an optional embodiment, the split-type optical modem system further includes an optical modem cabinet. The light cat cabinet is installed in the corridor and is used for placing a plurality of light cat units 10. Optionally, the optical modem cabinet is usually installed in the corridor on the middle floor of the building, so that users on the lower floor of the building and users on the upper floor can conveniently connect the SFU through the network cable Wi.

Fig. 2 is a schematic circuit diagram of the optical modem unit 10 in the split optical modem system shown in fig. 1, which only shows the relevant parts related to the embodiment for convenience of description, and the detailed description is as follows:

in an alternative embodiment, the optical modem unit 10 includes an ethernet PHY chip U1, a network transformer chip U4, a rectifier chip U46, a network connector J8, a first resistor R40, a second resistor R41, a third resistor R42, a fourth resistor R43, a first capacitor C70, a second capacitor C963, a third capacitor C964, and a fourth capacitor C210.

The network transformer chip U4 includes a first intermediate tap end TCT1, a second intermediate tap end TCT2, a third intermediate tap end TCT3, a fourth intermediate tap end TCT4, a fifth intermediate tap end MCT1, a sixth intermediate tap end MCT2, a seventh intermediate tap end MCT3, an eighth intermediate tap end MCT4, a first data transmission end TD1+, a second data transmission end TD1-, a third data transmission end TD2+, a fourth data transmission end TD2-, a fifth data transmission terminal TD3+, a sixth data transmission terminal TD3-, a seventh data transmission terminal TD4+, an eighth data transmission terminal TD4-, a ninth data transmission terminal MX1+, a tenth data transmission terminal MX1-, an eleventh data transmission terminal MX2+, a twelfth data transmission terminal MX2-, a thirteenth data transmission terminal MX3+, a fourteenth data transmission terminal MX3-, a fifteenth data transmission terminal MX4+, and a sixteenth data transmission terminal MX 4-.

The network connector J8 includes a first data port a1, a second data port a2, a third data port A3, a fourth data port a4, a fifth data port a5, a sixth data port a6, a seventh data port a7, and an eighth data port A8.

The first intermediate tap end TCT1, the second intermediate tap end TCT2, the third intermediate tap end TCT3, and the fourth intermediate tap end TCT4 are connected to a first terminal of a first capacitor C70, and a second terminal of the first capacitor C70 is grounded.

The first data transmission terminal TD1+, the second data transmission terminal TD1-, the third data transmission terminal TD2+, the fourth data transmission terminal TD2-, the fifth data transmission terminal TD3+, the sixth data transmission terminal TD3-, the seventh data transmission terminal TD4+, and the eighth data transmission terminal TD 4-are connected with the ethernet PHY chip U1.

the fifth intermediate tap end MCT1 is connected to a first end of a first resistor R40, and the sixth intermediate tap end MCT2 is connected to a first end of a second resistor R41; the seventh middle tap end MCT3 is connected to the first end of the second capacitor C963, and the second end of the second capacitor C963 is connected to the first end of the third resistor R42; the eighth middle tap end MCT4 is connected to a first end of a third capacitor C964, and a second end of the third capacitor C964 is connected to a first end of a fourth resistor R43; the second end of the first resistor R40, the second end of the second resistor R41, the second end of the third resistor R42, and the second end of the fourth resistor R43 are connected to the first end of the fourth capacitor C210, and the second end of the fourth capacitor C210 is grounded.

The ninth data transmission end MX1+, the tenth data transmission end MX1-, the eleventh data transmission end MX2+, the twelfth data transmission end MX2-, the thirteenth data transmission end MX3+, the fourteenth data transmission end MX3-, the fifteenth data transmission end MX4+, and the sixteenth data transmission end MX 4-are respectively connected to the eighth data end A8, the seventh data end a7, the fifth data end a5, the fourth data end a4, the sixth data end A6, the third data end A3, the second data end a2, and the first data end a 1.

a first input end of the rectifying chip U46 is connected with an eighth intermediate tap end MCT4, and a second input end of the rectifying chip U46 is connected with a seventh intermediate tap end MCT 3; the first output end of the rectifying chip U46 and the second output end of the rectifying chip U46 are connected together to serve as a power supply port of the optical modem unit 10, and are used for outputting a direct current signal.

Optionally, the optical modem unit 10 further includes a fifth resistor R974 and a diode D1, a first end of the fifth resistor R974 is connected to the seventh middle tap MCT3, and a second end of the fifth resistor R974 is used as a power supply port of the optical modem unit 10, and is configured to output a direct current signal; the anode of the diode D1 is connected to the eighth middle tap MCT4, and the cathode of the diode D1 is used as the power supply port of the optical modem unit 10 for outputting a dc signal.

Specifically, the functions of the fifth resistor R974, the diode D1 and the rectifying chip U46 are the same, and in practical applications, only the fifth resistor R974 is inside the optical modem unit 10, and the diode D1 and the rectifying chip U46 are not included; or only the diode D1 without the fifth resistor R974 and the rectifier chip U46; or only the rectifying chip U46 without the fifth resistor R974 and the diode D1.

the network transformer chip U4 is connected between the Ethernet PHY chip U1 and the network connector J8, and can realize the transmission of data signals, namely, differential signals output by the Ethernet PHY chip U1 are coupled and filtered through differential mode coupled coils, so that the data signals are enhanced, the transmission distance of the data signals is increased, the attenuation speed is reduced, and the anti-interference capability is improved; the data signal coil coupling is filtered and coupled to the network connector J8 by conversion of the electromagnetic field. Meanwhile, the network transformer chip U4 has a lightning protection function, and other components in the circuit are protected from being influenced by static electricity or lightning stroke and cannot work normally or even be damaged.

The first data terminal a1, the second data terminal a2, the third data terminal A3 and the sixth data terminal a6 of the network connector J8 are coupled to dc signals, and power is supplied from the relay unit 20 to the optical modem unit 10 through the network cable Wi in the reverse direction. Through coupling direct current signal on net twine Wi to the Power supply of optical modem unit 10, saved the POE agreement (Power Over Ethernet, active Ethernet agreement) design between optical modem unit 10 and transfer unit 20, also need not to establish Power or Power source interface in addition in the corridor in order to realize the Power supply to optical modem unit 10, practiced thrift the cost greatly when having simplified the circuit.

The second capacitor C963 and the third capacitor C964 are respectively connected in series before the two bob-smith circuits (i.e. the circuit formed by the third resistor R42 and the second capacitor C963, and the circuit formed by the fourth resistor R43 and the third capacitor C964). Because the transformer coils in the network transformer chip U4 are communicated, a ceramic capacitor is connected in series in front of the bob-smith circuit to play a role in isolating direct current, and direct current signals are prevented from forming a loop among the transformer coils, so that communication is influenced and RE exceeds the standard.

In an alternative embodiment, the network connector J8 is implemented as an RJ45 connector.

to sum up, the embodiment of the utility model provides a split type light cat system connects light cat unit and transfer unit through utilizing current net twine to realize network optical communication, the rational utilization has current net twine resource, has also practiced thrift the fortune maintenance cost greatly when providing optic fibre internet service for the user. And through coupling the direct current signal on the net twine, the light cat unit is supplied power to by the transfer unit in reverse direction, and the light cat unit need not external power supply, has simplified the circuit. The optical modem unit and the transfer unit are respectively arranged in a corridor and a user home and are connected through the network cable, the optical modem unit does not need to be installed in the user home, the project of dismantling the network cable existing in a building stair and re-erecting the optical fiber is saved, and the operation and maintenance cost is greatly reduced.

Various embodiments are described herein for various systems. Numerous specific details are set forth in order to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. However, it will be understood by those skilled in the art that the embodiments may be practiced without such specific details. In other instances, well-known operations, components and elements have been described in detail so as not to obscure the embodiments in the description. It will be appreciated by those of ordinary skill in the art that the embodiments herein and shown are non-limiting examples, and thus, it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.

Although certain embodiments have been described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the scope of this disclosure. Joinder references (e.g., attached, coupled, connected, and the like) are to be construed broadly and may include intermediate members between a connection of elements and relative movement between elements. Thus, connection references do not necessarily imply that two elements are directly connected/coupled and in a fixed relationship to each other. The use of "for example" throughout this specification should be interpreted broadly and used to provide non-limiting examples of embodiments of the disclosure, and the disclosure is not limited to such examples. It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not limiting

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

in addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (8)

1. A split-type optical cat system, comprising:

The optical modem units are arranged in the corridor, are in communication connection with the optical line terminal through optical fibers and are used for receiving and transmitting uplink data signals and downlink data signals; and

The system comprises a plurality of optical modem units and a plurality of transfer units, wherein the optical modem units are respectively arranged in each user family, are respectively connected with the optical modem units in a one-to-one correspondence manner through network cables, and are used for receiving corresponding downlink data signals, transmitting the downlink data signals to terminal equipment in a wireless manner, receiving uplink data signals sent by the terminal equipment, transmitting the uplink data signals to the corresponding optical modem units, and coupling direct current signals to the network cables and transmitting the direct current signals to the optical modem units so as to supply power to the optical modem units.

2. The split optical modem system of claim 1, wherein a plurality of optical modem units are implemented by a single-dwelling optical network terminal;

The single-dwelling-size optical network terminal only has one gigabit Ethernet interface, and the gigabit Ethernet interface is connected with the transfer unit through the network cable.

3. The split type optical modem system of claim 1, wherein the transit unit is implemented by a router;

And the network cable connecting port of the router is connected with the optical modem unit through a network cable.

4. the split light cat system according to claim 1 further comprising:

and the light cat cabinet is arranged in the corridor and used for placing a plurality of light cat units.

5. The split light cat system of claim 1 wherein the light cat unit comprises:

The device comprises an Ethernet PHY chip, a network transformer chip, a rectifier chip, a network connector, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor;

The network transformer chip comprises a first middle tap end, a second middle tap end, a third middle tap end, a fourth middle tap end, a fifth middle tap end, a sixth middle tap end, a seventh middle tap end, an eighth middle tap end, a first data transmission end, a second data transmission end, a third data transmission end, a fourth data transmission end, a fifth data transmission end, a sixth data transmission end, a seventh data transmission end, an eighth data transmission end, a ninth data transmission end, a tenth data transmission end, an eleventh data transmission end, a twelfth data transmission end, a thirteenth data transmission end, a fourteenth data transmission end, a fifteenth data transmission end and a sixteenth data transmission end;

The network connector comprises a first data end, a second data end, a third data end, a fourth data end, a fifth data end, a sixth data end, a seventh data end and an eighth data end;

The first intermediate tap end, the second intermediate tap end, the third intermediate tap end and the fourth intermediate tap end are connected with a first end of the first capacitor, and a second end of the first capacitor is grounded;

the first data transmission end, the second data transmission end, the third data transmission end, the fourth data transmission end, the fifth data transmission end, the sixth data transmission end, the seventh data transmission end and the eighth data transmission end are connected with the ethernet PHY chip;

the fifth middle tap end is connected with the first end of the first resistor, and the sixth middle tap end is connected with the first end of the second resistor; the seventh middle tap end is connected with the first end of the second capacitor, and the second end of the second capacitor is connected with the first end of the third resistor; the eighth middle tap end is connected with the first end of the third capacitor, and the second end of the third capacitor is connected with the first end of the fourth resistor; the second end of the first resistor, the second end of the second resistor, the second end of the third resistor and the second end of the fourth resistor are connected with the first end of the fourth capacitor, and the second end of the fourth capacitor is grounded;

the ninth data transmission end, the tenth data transmission end, the eleventh data transmission end, the twelfth data transmission end, the thirteenth data transmission end, the fourteenth data transmission end, the fifteenth data transmission end, and the sixteenth data transmission end are respectively connected to the eighth data end, the seventh data end, the fifth data end, the fourth data end, the sixth data end, the third data end, the second data end, and the first data end;

A first input end of the rectifying chip is connected with the eighth intermediate tap end, and a second input end of the rectifying chip is connected with the seventh intermediate tap end; and the first output end of the rectifying chip is connected with the second output end of the rectifying chip and is used as a power supply port of the optical modem unit together for outputting the direct current signal.

6. The split-type optical modem system of claim 5, wherein the network connector is implemented as an RJ45 connector.

7. The split-type optical modem system of claim 1, wherein the dc electrical signal is a 12V dc voltage signal.

8. The split type optical modem system of claim 1, wherein the network cable is implemented by any one of a category 5 network cable, a category 5 super network cable, a category 6 super network cable, or a category 7 network cable.