TW201349799A - VDSL network system and a VDSL repeater thereof - Google Patents

Abstract

The present invention is related to a VDSL network system and a VDSL repeater thereof. The VDSL network system has at least one pair of VDSL network devices and at least one VDSL repeater linking to one of the at least one pair of VDSL network devices. The VDSL repeater has a VDSL signal repeating unit and a power repeating unit. When the VDSL repeater links to one of the pair of the VDSL network devices, the power repeating unit thereof obtains DC power source from the VDSL network device linked to the VDSL repeater. Then the power repeating unit converts the DC power source to a local power source so that the VDSL repeater does not require an external local power source and successfully dual-transmits VDSL signals between the pair of the VDSL network devices. Therefore, an effective transmitting distance between the two VDSL network devices is increased by linking the VDSL repeater.

Description

VDSL network system and its VDSL repeater

The present invention relates to a VDSL network system, and more particularly to an extended pair of the present invention, a VDSL network system and a VDSL repeater thereof, wherein

The Ultra High Speed Digital Subscriber Loop (VDSL) is an asymmetric DSL that, like ADSL, is a member of the xDSL broadband solution family of copper transmissions. VDSL can effectively transmit uplink/downlink data: 50Mb/s to 100Mb/s data within a certain service range via a pair of traditional user twisted pairs, providing greater bandwidth and high transmission speed than ADSL.

Although VDSL has the above advantages, the priority must be established within a limited transmission distance. That is to say, the transmission speed of VDSL is inversely proportional to the transmission distance. Unless optical fiber digital circuits are used for transmission, most of the general wiring cannot be achieved. Its transmission quality requirements. Due to the use of fiber optic digital circuits in conjunction with fiber optic transmission lines, overall overall cost is not the best solution.

Please refer to FIG. 5, the VDSL network system is composed of a plurality of VDSL network devices 80 and 90. Since each pair of VDSL network devices 80 and 90 has a certain transmission distance limit to ensure the transmission quality, generally Said that if the transmission speed is not considered, the longest transmission distance of a pair of VDSL network devices 80, 90 can reach 2 kilometers; in fact, to ensure that the transmission speed of each pair of VDSL network devices 80, 90 can be maintained at 50Mb / For data information of s to 100 Mb/s, the transmission distance is about 500 meters, so constructing an available VDSL network requires a large number of VDSL network devices.

Furthermore, since the VDSL network system includes at least one pair of VDSL network devices 80, 90, and each requires the use of an external power source, in addition to considering the VDSL network devices 80, 90 between the VDSL network devices. In addition to setting the distance not too far away, it is necessary to take into account that each installation location must have a separate power line to provide the working power for each VDSL network device 80, 90. Therefore, the design of the VDSL network device is still constructed when the VDSL area network is constructed. The inconvenience caused the VDSL network to be completely inaccessible.

In addition, as shown in FIG. 6, when the VDSL signals of a pair of VDSL network devices 80 and 90 in the VDSL network become weak and cannot improve the VDSL signal of any VDSL network device, they must be connected in series. The VDSL network devices 80, 90 have to communicate smoothly, which also causes the overall VDSL network construction cost to increase; in addition, since each VDSL network device requires an external power supply, it is necessary to provide two sets of external power supplies to operate normally. .

In view of the above-mentioned technical shortcomings of the existing VDSL network system, the main purpose of the present invention is to provide a VDSL network system and a VDSL repeater thereof to solve the VDSL of the paired VDSL network device due to the transmission distance and the limitation of installing the power supply. The inconvenience of network construction.

The main technical means used for the above purposes is that the VDSL network system includes: at least one pair of VDSL network devices, each VDSL network device having a first port and at least one network port, wherein the A connection system transmits DC power and transmits and receives VDSL signals simultaneously, and each network is used to transmit and receive VDSL signals; At least one VDSL repeater, each VDSL repeater is connected in series between one pair of VDSL network devices, and includes a VDSL signal relay unit, a power relay unit, and two connected to the corresponding first port a second port, wherein the VDSL signal relay unit respectively transmits and receives the VDSL signal transmitted by the pair of VDSL network devices from the two second ports, and the power relay unit obtains the VDSL network device from one of the VDSL network devices. After the connection, the DC power is obtained from the first port connected to the VDSL network device in the connection.

The above invention mainly provides a VDSL repeater serially connected to a pair of VDSL network devices of the VDSL network system, and the first connection port of the VDSL network device outputs DC power, and cooperates with the VDSL. The relay includes a power relay unit, so the VDSL repeater can obtain the DC power of one of the VDSL network devices, and convert the DC power to be used as the working power; therefore, the VDSL repeater does not have to The local power supply is additionally required for connection, and the VDSL repeater is disposed between the two VDSL network devices, and can be conveniently set to lengthen the transmission distance of the two VDSL network devices to facilitate the VDSL network construction.

Moreover, the VDSL repeater is disposed between the two VDSL network devices, so that any VDSL network device is closer to the VDSL network device, so the VDSL signal relay unit can receive the two VDSL network devices respectively. After the VDSL signal is transmitted to the relatively VDSL network device, the two VDSL network devices transmit VDSL signal strength to each other. Since the VDSL network system of the present invention can connect the VDSL network device to the VDSL repeater for transmission. The distance is longer, so the overall cost of construction is effectively reduced compared to the extended transmission distance of another pair of VDSL network devices.

Referring to FIG. 1 and FIG. 2, a VDSL network system architecture diagram of the present invention includes: at least one pair of VDSL network devices 10, 10a, each VDSL network device 10, 10a includes a first VDSL. The module 20, a power supply unit 30, a first connection port 201 (such as RJ-11埠, RJ-45埠, electric axis cable connection port) and at least one network port 202, wherein the first VDSL module 20 is The VDSL signal processing unit 21 and an Ethernet physical layer unit 22 (Ethernet PHY) are connected to the first port 201 through an analog front end unit (AFE). And connecting to the network 202 (such as RJ-11埠, RJ-45埠) through the Ethernet physical layer unit 22; and the VDSL module 21 transmits the DC power by the first connection 201 Transmitting and receiving a VDSL signal, and the power unit 30 generates a local power source and a remote power source, and has a power supply detection program built therein to determine whether to output the remote power source and can be coupled to the first port by a transformer 24; At least one VDSL repeater 40 is respectively connected in series between a pair of VDSL network devices 10, 10a. The VDSL repeater 40 includes: two second ports 53 connected to the first port 201 of the corresponding VDSL network device 10, 10a by transmission lines respectively; wherein the transmission line may be a twisted pair such as RJ11 , a RJ45 twisted pair cable, a cable line or a CAT 5e network route, etc.; a VDSL signal relay unit 50 is connected to the two second ports 53 for transmitting and receiving VDSL signals of the two VDSL network devices 10, 10a The VDSL signal relay unit 50 includes two connected to the two a second VDSL module 51 connected to the second port 53 and an Ethernet physical layer module 52 bridging the second VDSL module 51; and a power relay unit 60 coupled to the two The second port 53 is used to obtain a DC power source from one of the second ports 53.

The VDSL repeater 40 is connected in series between the two VDSL network devices 10, 10a. Since the VDSL repeater 40 may not have local power, one of the VDSL network devices 10 is first connected to the VDSL repeater 40 by a transmission line. After that, a power supply detection procedure is executed to confirm whether the VDSL repeater 40 has a local power source. If it is confirmed that the VDSL repeater 40 does not have a local power source, the remote power source is output and coupled to the first port 201. Thus, the power relay unit of the VDSL repeater obtains the working power from the second port 53.

The detailed circuit of the power supply unit 30 of each VDSL network device 10, 10a and the steps of executing the power supply detection procedure are further described below.

The power supply unit 30 of each of the VDSL network devices 10 and 10a includes: a power supply circuit 31 for converting an external power source into at least two DC power sources as a local power source and a remote power source, and executing the power supply detection program. The power supply circuit 31 can be an AC/DC conversion circuit or a DC-DC conversion circuit; a power protection circuit 32 is connected to the power supply circuit of the power supply circuit. The current monitoring and protection circuit 321 and an overvoltage protection circuit 322 are configured to detect the current of the power circuit and determine that the current exceeds the limited current value (4 mA to 6 mA). The power circuit is interrupted; in addition, the overcurrent monitoring and protection circuit 321 can further detect the voltage of the power circuit, calculate the total power by current and voltage, and determine whether the total power exceeds a maximum safe power, and if so, interrupt the The power supply circuit of the power supply circuit; and the overvoltage protection circuit 322 can use, for example, a lightning arrester, the lightning arrester is connected to the overcurrent monitoring protection circuit, when the power supply circuit voltage is equal to the trigger voltage (such as 280V~420V), the lightning arrester Short-circuiting to drive the over-current monitoring protection circuit 321 to interrupt the power supply circuit; that is, the power protection circuit 32 can perform open-circuit protection for over-current or over-voltage; a local power output 埠33 is connected to the power supply circuit 31, To output a set of direct current (local power) to the first VDSL module 20; and a remote power output 埠34, connected to the power supply circuit of the power supply circuit 31 to output another set of direct current (far The terminal power source is coupled to the first port 201.

Referring to FIG. 3, the power supply circuit 31 performs the power supply detection process. The method includes the following steps: outputting an impedance detection signal to the first port 201, wherein the impedance detection signal is a voltage signal S10. Receiving a return impedance detection signal to calculate the impedance value S11 of the VDSL repeater; determining whether the impedance value is correct, and if correct, outputting a set of DC power to the remote power output 埠, so that the first connection 201 outputs The DC power source S12; and continuously performs the above steps.

Since the power supply circuit 31 continuously performs the power supply detection process, after the second PoE connector 53 of the VDSL repeater 40 is docked, if the VDSL repeater 40 does not have a local power source, the correct impedance is obtained. The value, and a set of DC power is output to the first PoE connector 201 of the VDSL repeater 40, and the VDSL repeater 40 obtains the operating power.

Since the VDSL repeater 40 will interface with the two VDSL network devices 10, 10a, when one of the VDSL network devices 10 first outputs DC power to the VDSL repeater 40, the impedance of the VDSL repeater 40 changes. Therefore, another VDSL network device 10a that executes the power supply detection procedure does not detect the correct impedance value, and does not output the DC power from its first port 201; therefore, the present invention uses the VDSL relay. The device 40 does not need to require a local power supply to operate, and the problem of inconvenience of the local power supply of the VDSL network system is eliminated.

As shown in FIG. 4, the power relay unit 60a of the VDSL repeater 40a further includes a power conversion circuit 61 for connecting an AC or DC local power source and converting it into at least one DC power source, wherein One set is output to a local power port 62.

Moreover, in order to facilitate the network installation personnel to conveniently view the connection status of each VDSL network device 10, 10a, as shown in FIG. 4, the VDSL repeater of the present invention further includes a processing unit 55, the processing unit 55 is connected between the second VDSL module 51, that is, each of the second VDSL modules 51 includes at least one VDSL signal processor 511 and an analog front end unit 512, and the processing unit 55 is connected to the two VDSL signal processing. 511. Since the VDSL signal processor 511 is connected to the second port 53 through its corresponding analog front end unit 512, it can receive the VDSL connected thereto. The VDSL signal of the network device 10, 10a is such that the VDSL signal processor 511 can obtain the connection state of the VDSL network device 10, 10a connected thereto, so the processing unit 55 can read the two VDSL signal processor 511. When the connection status of the two VDSL network devices 10, 10a is obtained, and the connection status request is transmitted from any of the VDSL network devices 10, the processing unit 55 reads the VDSL signal processor 511 to Reporting the connection status of the other VDSL network device 10a to the VDSL network device 10 that issued the connection status request, so that the network administrator of the VDSL network device 10 that issued the connection status request can The connection state of another VDSL network device 10a at the remote end is obtained locally, and the repair time of the VDSL network system disconnection is effectively reduced.

Furthermore, since the second VDSL module 51 of the VDSL repeater 40 can transmit and receive the VDSL signals of the two VDSL network devices 10 and 10a, and the Ethernet physical layer unit 52 is connected thereto, the two VDSL modules can communicate with each other. The VDSL signals transmitted by the two VDSL network devices 10 and 10a are smoothly transmitted.

As shown in FIG. 1, the present invention mainly connects a VDSL repeater 40 in series between a pair of VDSL network devices 10, 10a, so that the VDSL repeater 40 is separated from any VDSL network device 10, 10a. The two VDSL network devices 10 and 10a are close to each other, and can respectively transmit the VDSL signals transmitted from the two VDSL network devices 10 and 10a to the VDSL network devices 10a and 10 to ensure the two VDSL network devices. 10, 10a mutually transmit VDSL signal strength; thus, only a single VDSL repeater 40 is required to be placed in a pair of VDSL network devices 10, 10a, thereby lengthening the relationship between the pair of VDSL network devices 10, 10a Transmission distance. In order to limit the transmission distance of 2 kilometers, the VDSL repeater 40 is added to the VDSL network device. After 10, 10a, it can be extended by at least 4 kilometers.

In summary, the VDSL repeater of the present invention does not require a local power supply to extend the two VDSL network devices, and does not have to use a pair of VDSL network devices to extend the transmission distance, thereby effectively saving network system construction time and saving. The cost is built, and the VDSL repeater has the function of returning the connection status of each VDSL network device. The network administrator can know the connection status of the remote VDSL network device in one of the VDSL network devices, thereby shortening the VDSL. The abnormality of the signal interruption or the abnormal connection time is eliminated. Therefore, the VDSL network system of the present invention can use the VDSL repeater to transmit the power and signal distance more than twice that of the existing VDSL environment.

10, 10a‧‧‧VDSL network device

20‧‧‧First VDSL module

201‧‧‧First connection埠

202‧‧‧Network Information

21‧‧‧VDSL signal processing unit

22‧‧‧Ethernet entity layer unit

23‧‧‧ analog front-end unit

24‧‧‧Transformers

30‧‧‧Power unit

31‧‧‧Power supply circuit

32‧‧‧Power protection circuit

321‧‧‧Overcurrent monitoring and protection circuit

322‧‧‧Overvoltage protection circuit

40, 40a‧‧‧VDSL repeater

50‧‧‧VDSL signal relay unit

51‧‧‧Second VDSL module

52‧‧‧Ethernet physical layer module

53‧‧‧Second connection埠

54‧‧‧Transformers

60, 60a‧‧‧Power relay unit

61‧‧‧Power Conversion Unit

62‧‧‧Local power supply埠

80, 90‧‧‧VDSL network device

Figure 1 is a block diagram of the VDSL network system of the present invention.

2 is a circuit block diagram of a VDSL repeater and a pair of VDSL network devices of the present invention.

Figure 3 is a flow chart showing the power supply detection procedure of the present invention.

Figure 4: Block diagram of another VDSL repeater.

Figure 5: Architecture diagram of an existing VDSL network system.

Figure 6: Part of the architecture of the existing VDSL network system.

10, 10a‧‧‧VDSL network device

40‧‧‧VDSL Repeater

Claims (16)

A VDSL network system includes: at least one pair of VDSL network devices, each VDSL network device having a first port and at least one network port, wherein the first port is configured to transmit DC power and transmit and receive VDSL. Signals, and each network 埠 sends and receives VDSL signals; and at least one VDSL repeater, each VDSL repeater is connected in series between one pair of VDSL network devices, and includes a VDSL signal relay unit, a power relay a unit and two second ports respectively connected to the first port, wherein the VDSL signal relay unit respectively transmits and receives the VDSL signals transmitted by the pair of VDSL network devices from the two second ports, and the power relay unit After one of the VDSL network devices is first connected, the first port connected to the VDSL network device in the connection obtains DC power. The VDSL network system as claimed in claim 1, each VDSL network device includes: a first VDSL module that transmits and receives a VDSL signal by using a VDSL communication protocol; and a power supply unit that generates a local power source and a far distance. The power supply has a power supply detection program built in to determine whether to output the remote power and couple to the first port. The VDSL network system of claim 2, wherein the power supply unit of each VDSL network device comprises: a power supply circuit that converts an external power source into the local power source and the remote power source, and executes the power supply. a detection program; a local power output port is connected to the power supply circuit to lose And outputting the local power source to the first VDSL module; and a remote power output port, serially connected to the power supply circuit of the power supply circuit to output the remote power source, and coupling the remote power source to the first A connection. The VDSL network system of claim 3, wherein the power supply unit of each VDSL network device performs the power supply detection process, including: outputting an impedance detection signal to the first port, wherein the impedance detection signal is a voltage signal; receiving a return impedance detection signal to calculate an impedance value of the VDSL repeater; determining whether the impedance value is correct, and if correct, outputting a set of DC power to the remote power output 埠, so that the first connection 埠 output The DC power supply; and continuously performing the above steps. The VDSL network system of claim 4, the power supply unit of each VDSL network device further includes a power protection circuit serially connected to the power supply circuit of the power supply circuit, and includes: an overcurrent monitoring protection The circuit detects the current of the power circuit and determines that the current exceeds the limit current value, thereby interrupting the power circuit; and an overvoltage protection circuit detects the power circuit voltage, and when the detected voltage is greater than a trigger voltage, Driving the overcurrent monitoring protection circuit interrupts the power supply loop. The VDSL network system according to claim 5, wherein the overcurrent monitoring and protection circuit further detects the voltage of the power circuit, calculates the total power by current and voltage, and determines whether the total power exceeds the maximum safe power, and if Then interrupt the power supply circuit of the power supply circuit. The VDSL network system as claimed in claim 6, wherein the overvoltage protection circuit comprises a lightning arrester, and the short circuit is when the power supply circuit voltage is greater than its trigger voltage. The VDSL network system according to any one of claims 2 to 7, wherein the first VDSL module of each VDSL network device comprises: a VDSL signal processing unit; and an Ethernet physical layer unit. Connected between the VDSL signal processing unit and the at least one network port; an analog front end unit is connected between the first port and the VDSL signal processing unit; the VDSL signal of the VDSL repeater is The successor unit includes: two sets of second VDSL modules connected to the two second ports respectively; and an Ethernet physical layer module bridged between the two second VDSL modules. The VDSL network relay unit of the VDSL repeater further includes a processing unit, the processing unit is connected between the two VDSL modules to read the connection of the VDSL module. Line status. In the VDSL network system of claim 9, the power supply unit of each VDSL network device is coupled to the first port via a transformer. In the VDSL network system of claim 1, the power relay unit of each VDSL repeater further includes: a power conversion circuit converts an external power source into at least two DC power sources and outputs the same; a local power source output port is connected to the power conversion circuit to output one of the DC currents to the VDSL signal relay unit; The remote power output port is connected to the power circuit of the power conversion circuit to output another set of DC current, and the DC current is coupled to the two second ports. The VDSL network system of claim 10, wherein the power relay unit of each VDSL repeater further comprises: a power conversion circuit that converts an external power source into at least two DC power sources and outputs; and a local power output 埠And connected to the power conversion circuit to output one of the DC currents to the VDSL signal relay unit. A VDSL repeater includes: a two-connected port; a VDSL signal relay unit connected to the two ports for transmitting and receiving VDSL signals; and a power relay unit coupled to the two ports One of the ports connects to the DC power supply. For example, the VDSL relay unit of claim 13 includes: two VDSL modules connected to the two second ports respectively; and an Ethernet physical layer module, which is bridged Between the two sets of second VDSL modules. The VDSL repeater as claimed in claim 14 further includes There is a processing unit, the processing unit is connected between the two VDSL modules to read the connection state of the VDSL module. The VDSL repeater according to any one of claims 13 to 15, wherein the power relay unit further comprises: a power conversion circuit that converts an external power source into at least two DC power sources and outputs the same; The output port is connected to the power conversion circuit to output a set of direct current to the VDSL signal relay unit.