CN201118594Y - Optical network terminal and optical line terminal - Google Patents

Abstract

The utility model discloses an optical network terminal, which comprises: a power measuring unit used to measure the power of an optical signal from an optical line terminal OLT; a receiving unit used to receive transmission optical power information issued by the optical line terminal OLT; The power measuring unit is connected to the receiving unit, and is used to determine the optical power of the optical path according to the optical signal power of the optical line terminal OLT measured by the power measuring unit and the transmitted optical power information received by the receiving unit A calculation unit for loss; and an indication unit for indicating optical power information. The utility model also discloses an optical line terminal, comprising: an acquisition unit for acquiring transmission optical power information and time synchronization information corresponding to the transmission optical power; and a transmission unit connected with the acquisition unit. By implementing the utility model, the efficiency of ONT installation can be improved, the installation time of ONT can be shortened, and the deployment and maintenance costs of operators can be reduced.

Description

Optical network terminal and optical line terminal

technical field

The utility model relates to the communication field, in particular to an optical network terminal and an optical line terminal with an optical power information indicating function.

Background technique

The PON system is composed of local equipment OLT, remote equipment ONT, and ODN (including optical splitter). Both OLT and ONT contain devices (optical Transceiver) that can perform optical transceivers. OLT and ONT communicate with each other through ODN optical fibers. ; When the optical signal is transmitted in the ODN, the intensity will be attenuated due to various reasons, such as different fiber lengths, excessive bending of the fiber, compression of the fiber, loose optical connectors, environmental temperature changes, etc., will affect the optical attenuation, so the light from the OLT to the ONT Power levels will vary frequently.

Due to the influence of various factors such as the environment, the transmitted optical power of the ONT will also change frequently.

In the PON system, there are generally standards that define the allowable attenuation range of the ODN and the optical power range received by the ONT. In actual engineering, when the construction of the ODN network is completed, or when new users apply for access services, it is necessary for the professional and technical personnel of the operator to bring special test equipment to test the actual optical power attenuation of the ODN, so as to ensure the received optical power of the ONT in operation. within the normal range.

After the user service is activated, the received optical power of the ONT will be too low due to various reasons, which will cause the user's service to be abnormal. This is often caused by the user's improper fiber placement or loose optical connectors. However, the user cannot obtain the judgment information by himself, and can only report the fault to the network operator. The network operator arranges technicians to bring special instruments to locate the problem. For operators, this is a very time-consuming and cost-intensive process.

Utility model content

The technical problem to be solved by the embodiment of the utility model is to provide an optical network terminal (ONT), which solves the problem that users cannot easily and quickly learn information such as optical power intensity, so that they cannot conveniently and quickly install and determine the cause of a fault.

In order to solve the above technical problems, an embodiment of the present invention provides an optical network terminal device, including:

a power measurement unit for measuring the power of an optical signal from an optical line terminal OLT;

A receiving unit for receiving transmitted optical power information from an optical line terminal OLT;

respectively connected to the power measuring unit and the receiving unit, and used to determine the power of the optical path according to the optical signal power of the optical line terminal OLT measured by the power measuring unit and the transmitted optical power information received by the receiving unit Calculation unit of optical power loss;

An indication unit connected to the calculation unit for indicating optical power information, where the optical power information includes: optical power loss information of an optical path and/or optical power information of an ONT.

The embodiment of the utility model also provides an optical line terminal OLT, which is characterized in that it includes:

An acquisition unit for acquiring transmit optical power information and time synchronization information corresponding to the transmit optical power;

A sending unit connected to the acquiring unit, configured to send the transmitted optical power information obtained by the acquiring unit and the time synchronization information corresponding to the transmitted optical power to the optical network terminal ONT, so that the ONT transmits the information according to the transmitted optical power The power information and time synchronization information determine the optical power consumption of the optical path.

The embodiment of the utility model solves the problem that the existing ONT cannot indicate the optical path loss or the received optical power and the transmitted optical power information, which can improve the efficiency of ONT installation, greatly shorten the installation time of ONT, and make the installation of ONT friendly Simple and convenient, ordinary users can install ONT by themselves, reducing the deployment cost of operators; during the process of installing and using ONT, it is convenient to determine the cause of failure and reduce maintenance costs of operators.

Description of drawings

FIG. 1 is a schematic diagram of the composition of an optical network terminal according to Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of the composition of the indicating unit of the optical network terminal according to Embodiment 1 of the present invention;

3 is a schematic diagram of the appearance of the indicating unit of the optical network terminal according to Embodiment 1 of the present invention;

Fig. 4 is a schematic diagram of the indication unit of the optical network terminal according to Embodiment 1 of the present invention displayed in the form of a percentage;

FIG. 5 is a schematic diagram of the composition of the optical network terminal in Embodiment 2 of the present invention;

Fig. 6 is a schematic diagram of the composition of the optical line terminal according to the third embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

Embodiment one

FIG. 1 is a schematic diagram of the composition of an optical network terminal ONT according to an embodiment of the present invention. As shown in the figure, the ONT of this embodiment includes:

A power measurement unit 102 for measuring the power of the optical signal from the optical line terminal OLT, the measured optical power value is recorded as _{PRX_ONT} ;

A receiving unit 104 for receiving transmitted optical power information issued by the OLT, where the optical power information includes an optical power value P _{TX_OLT} ;

respectively connected to the power measuring unit and the receiving unit, and used to calculate the optical power of the optical path according to the optical signal power of the optical line terminal OLT measured by the power measuring unit and the transmitted optical power information received by the receiving unit A loss calculation unit 106; specifically, the calculation unit can calculate the optical power loss of the optical path according to the difference between P _{TX_OLT} and _{PRX_ONT} —specifically, it can be the optical power loss OL _OND of the ODN;

An indication unit 108 connected to the calculation unit for indicating optical power information, the optical power information includes: optical power loss information of the optical path, ONT optical power information and other information.

Further, the ONT may further include: a storage unit 110 connected to the calculation unit and used for storing calculation results of the calculation unit. The storage unit is used to record and store historical record information such as optical power loss information of the optical path, ONT optical power information, etc., for routine maintenance and monitoring.

As shown in Figure 2, the indicating unit 108 may specifically have a visual prompt function, including a display circuit 202 and an information display panel 204, the display circuit and the information display panel are connected, wherein the information display panel is used to display optical power information, and the optical power The information at least includes: optical power loss information of the optical path, and optical power information of the ONT (for example, information about transmitted optical power and/or received optical power).

The value of the measured downlink received optical power and/or uplink transmitted optical power may be displayed on the ONT in a percentage manner, or the measured value may be directly displayed. When displayed as a percentage, it can be displayed in the form of a progress bar, as shown in Figure 3, or directly displayed in the form of a digital percentage.

When displayed as a percentage, it is relative to the receiving and sending optical power range defined by the standard. If the received optical power range defined by the standard is -10dBm～-30dBm, the range is 20dB, if the measured received optical power is -20dBm, the displayed percentage can be (-20-(-30))/20=50% .

The percentage can also be converted according to the upper and lower thresholds of the set optical power/optical power loss.

The ONT of this embodiment can be either a GPON ONT, an EPON ONT, or other types of PON ONTs.

The data calculated by the computing unit 106 can be indicated (displayed) output on the ONT by the indicating unit 108 in a variety of ways. Use LED or LCD display screens to directly display optical power/optical power loss data or percentage values. The alarm threshold can be set, and the ONT will send alarm information such as sound and indicator light according to the setting of the alarm threshold. For example, the indication unit may be an audio unit, connected to the calculation unit, and configured to output optical power information in audio form, and the optical power information at least includes: optical path optical power loss information and ONT optical power information.

As an extension of the ONT information output, the ONT can output the measured or calculated optical power/optical power loss and other data to other external display devices for display through the communication interface.

Embodiment two

When the OLT sends/broadcasts the optical power information, due to the data transmission delay, the ONT will have an error when calculating the ODN loss. In order to eliminate this error, the following methods can be used:

1. The ONT measures its received optical power P _{RX_ONT} sequence, and marks the time synchronization information;

2. The OLT records the corresponding time synchronization information while measuring the transmission optical power, and sends the transmission optical power and time synchronization information to the ONT together;

3. After receiving the transmission optical power and time synchronization information sent by the OLT, the ONT calculates the ODN optical power loss according to the same time synchronization information, so that the optical power loss information of the optical path can be calculated more accurately;

4. The ONT displays the optical power loss information.

The above-mentioned time synchronization information includes: GPON super-frame counting can be used in GPON, or a time synchronization data broadcasted by OLT to ONT in some fields or OLT.

The specific implementation is shown in Figure 5, the ONT provided by this embodiment further includes on the basis of Embodiment 1:

A time recording unit 112 connected to the power measurement unit for recording the corresponding time information of the optical signal measured by the power measurement unit; the "time information" here may specifically be time synchronization information;

A time receiving unit 114 connected to the receiving unit and configured to receive time synchronization information sent by the optical line terminal OLT and corresponding to the transmitted optical power received by the receiving unit.

Embodiment Three

This embodiment provides an OLT, which can be matched with the ONTs of Embodiments 1 and 2. The OLT includes:

An acquisition unit for acquiring transmit optical power information and time synchronization information corresponding to the transmit optical power;

The sending unit connected with the acquisition unit is used to send the transmitted optical power information and the time synchronization information corresponding to the transmitted optical power to the optical network terminal ONT, so as to provide the ONT to make the ONT transmit optical power information based on the transmitted optical power information. and time synchronization information to determine the optical power loss of the optical path. The sending unit specifically includes: a first sending unit and a second sending unit, the first sending unit is connected to the second sending unit, wherein,

The first sending unit is used to send the sending optical power information to the optical network terminal ONT;

The second sending unit is configured to send the time synchronization information corresponding to the sending optical power to the optical network terminal ONT.

As shown in FIG. 6 , the first sending unit is specifically an optical power information sending unit 604 , and the second sending unit is specifically a time synchronization information sending unit 606 .

The OLT in this embodiment may further include: a storage unit 608 connected to the sending unit for storing the sending optical power information sent by the sending unit and the time synchronization information corresponding to the optical power. The storage unit is used to record and store historical record information such as the above-mentioned optical power information, so as to facilitate daily maintenance and monitoring.

By implementing the utility model embodiment, the following beneficial effects are arranged:

(1) It can improve the efficiency of ONT installation and greatly shorten the installation time of ONT;

(2) Make the installation of ONT friendly and simple, and ordinary users can install ONT by themselves, reducing the deployment cost of operators;

(3) In the process of installing and using ONT, it is convenient to judge the cause of the failure, and know whether it is an optical path problem or other (such as configuration) problems;

(4) Ordinary users can know whether it is an optical path problem or other problems, so that they can solve some problems by themselves and reduce the maintenance cost of operators. For example, if they find that the light attenuation indicator is large, their own optical fiber may be excessively bent, and they will try to solve it by themselves;

(5) Before the ONT is installed and certified, the optical path problem can be solved in advance according to the information displayed by the ONT.

What is disclosed above is only a preferred embodiment of the utility model, and of course it cannot limit the scope of rights of the utility model. Therefore, equivalent changes made according to the claims of the utility model still fall within the scope of the utility model.

Claims (10)

1. An optical network terminal equipment ONT, characterized in that it comprises: a power measurement unit for measuring the power of an optical signal from an optical line terminal OLT; A receiving unit for receiving transmitted optical power information from an optical line terminal OLT; respectively connected to the power measuring unit and the receiving unit, and used to determine the power of the optical path according to the optical signal power of the optical line terminal OLT measured by the power measuring unit and the transmitted optical power information received by the receiving unit Calculation unit of optical power loss; An indication unit connected to the calculation unit for indicating optical power information, where the optical power information includes: optical power loss information of an optical path and/or optical power information of an ONT. 2. The ONT according to claim 1, wherein the indication unit comprises a display circuit and an information display panel, the display circuit is connected to the information display panel, wherein the information display panel is used to display optical power information, The optical power information includes: optical power loss information of the optical path and/or optical power information of the ONT. 3. The ONT according to claim 2, wherein the type of the information display panel includes: a light emitting diode (LED) or a liquid crystal display (LCD). 4. The ONT according to claim 1, wherein the indication unit includes an audio unit, which is used to output the optical power information by audio, and the optical power information includes: optical power loss information of the optical path and /or ONT optical power information. 5. The ONT according to claim 1, further comprising: a time recording unit connected to the power measurement unit and used for recording corresponding time information of the optical signal measured by the power measurement unit. 6. The ONT according to claim 1, further comprising: a time receiving unit for receiving time synchronization information sent by the OLT and corresponding to the transmitted optical power received by the receiving unit. 7. The ONT according to claim 1, further comprising: a storage unit connected to the calculation unit for storing calculation results of the calculation unit. 8. An optical line terminal OLT, characterized in that it comprises: An acquisition unit for acquiring transmit optical power information and time synchronization information corresponding to the transmit optical power; A sending unit connected to the acquiring unit, configured to send the transmitted optical power information obtained by the acquiring unit and the time synchronization information corresponding to the transmitted optical power to the optical network terminal ONT, so that the ONT transmits the information according to the transmitted optical power The power information and time synchronization information determine the optical power consumption of the optical path. 9. The OLT according to claim 8, wherein the sending unit comprises: a first sending unit and a second sending unit, the first sending unit is connected to the second sending unit, wherein, The first sending unit is used to send the sending optical power information to the optical network terminal ONT; The second sending unit is configured to send the time synchronization information corresponding to the sending optical power to the optical network terminal ONT. 10. The OLT according to claim 8, further comprising: connected to the sending unit, used for storing the sending optical power information sent by the sending unit and the time synchronization corresponding to the sending optical power A storage unit for information.

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