CN113938214A

CN113938214A - Fiber optic network methods and related apparatus

Info

Publication number: CN113938214A
Application number: CN202010667198.4A
Authority: CN
Inventors: 林鸿文; 许木荣
Original assignee: Realtek Semiconductor Corp
Current assignee: Realtek Semiconductor Corp
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2022-01-14

Abstract

The present application provides a fiber optic network method and related apparatus. The method comprises the following steps: receiving uplink burst time configuration information from an opposite terminal; and enabling or disabling the laser module at the local end according to the uplink burst time configuration information.

Description

Fiber optic network methods and related apparatus

Technical Field

The present disclosure relates to a fiber network method, and more particularly, to a fiber network method for controlling a laser module and a related apparatus.

Background

An uplink transmission of a Passive Optical Network (PON) system adopts a time-division multiplexing mechanism, and an Optical Line Terminal (OLT) assigns different Optical Network Units (ONUs) to occupy optical fibers at different time periods to transmit uplink data, and at this time, other ONUs cannot transmit signals, or interference is caused. In the current PON system, the OLT can only control whether the transmitting end of the ONU enters the power saving mode, and if the OLT does not support this function, the power consumption of the ONU cannot be reduced.

Disclosure of Invention

The application discloses an optical fiber network method, comprising: receiving uplink burst time configuration information from an opposite terminal; and enabling or disabling the laser module at the local end according to the uplink burst time configuration information.

The application discloses optical network device for control the laser module of this end, this optical network device includes: a storage unit, configured to temporarily store uplink burst time configuration information received from an opposite end; and a control unit for enabling or disabling the laser module according to the upstream burst time configuration information.

The method and the device can reduce the power consumption of the laser module of the ONU under the condition of not influencing the efficiency.

Drawings

Fig. 1 is a schematic diagram of a PON system according to the present application.

FIG. 2 is a flowchart embodiment of a fiber optic network device of the present application controlling the activation or deactivation of a laser module.

Fig. 3 is a first example of signals BEN and TXDS generated in response to performing the method of fig. 2.

Fig. 4 shows a second example of signals BEN and TXDS generated in response to performing the method of fig. 2.

Detailed Description

The application discloses a method and a related system, which can enable an Optical Network Unit (ONU) in a Passive Optical Network (PON) to actively judge whether to close a laser module when uplink transmission is not performed no matter whether an Optical Line Terminal (OLT) supports a power saving mode. Therefore, power consumption of the ONU can be reduced.

Fig. 1 is a schematic diagram of a PON system according to the present application. The plurality of ONUs 110a, 110b, 110c, etc. in fig. 1 are connected to the OLT 140 through optical fibers and splitters 130. The OLT 140 actively broadcasts the plurality of ONUs 110a, 110b, 110c, etc. to communicate burst (burst) time configuration information, so that the plurality of ONUs 110a, 110b, 110c, etc. perform upstream transmission in a time division multiplexing scheme. For example, in a Gigabit Passive Optical Network (GPON) system, the upstream burst time configuration information is located in a bandwidth map field (bwmap); in an Ethernet Passive Optical Network (EPON), the upstream burst time configuration information is located in a grant field (grant).

The plurality of ONUs 110a, 110b, and 110c have the same function and structure, and the ONU110a is taken as an example to illustrate, which includes the optical fiber network device 100 and the laser module 112. When the ONU110a receives the upstream burst time allocation information and stores the upstream burst time allocation information in the storage unit 104, the control unit 102 may generate a signal BEN to control the shielding of the laser module 112 to be turned on or off according to the upstream burst time allocation information; and generates signal TXDS to enable or disable laser module 112. Specifically, when the shielding of the laser module 112 is closed, the optical signal emitted by the laser module 112 is shielded and cannot be received by the OLT 140, and the power consumption of the laser module 112 when it is deactivated is much smaller than that when the laser module 112 is activated.

Specifically, the upstream burst time allocation information records a time point when the OLT 140 allocates upstream burst transmission to the ONUs 110a, 110b, 110c, etc., so that, when the ONU110a receives the upstream burst time allocation information, the start time and the end time of the upstream bursts allocated to the ONU110a, such as the start time and the end time of the first burst, the start time and the end time of the second burst, and the start time and the end time of the third burst, are stored in the storage unit 104. The control unit 102 reads the start time and the end time of two bursts to be transmitted at the latest time point, wherein the start time of the burst to be transmitted first is set to ST1, and the end time is set to ET 1; the start time of the burst to be transmitted later is set to ST2, and the end time is set to ET 2.

The signal BEN of the control unit 102 controls the shielding of the laser module 112 to be opened between ST1 and ET1, closed between ET1 and ST2, and opened between ST2 and ET2 so that the upstream burst can be seen by the OLT 140, and at this time, the shielding of the laser modules of the

ONUs

110b, 110c, etc. other than the ONU110a is closed according to the upstream burst time configuration information to avoid the upstream burst interfering with the ONU110a after passing through the splitter 130.

However, since a switch-on time (switch-on time) is required to enter normal operation after the laser module 112 is enabled from the disabled state, the signal TXDS of the control unit 102 cannot enable or disable the laser module 112 in the same manner as the signal BEN. In this embodiment, the optical fiber network device 100 further includes another storage unit 106 for recording a specific time TS, and the user can preset the specific time TS according to the characteristics of the laser module 112 controlled by the optical fiber network device 100, for example, the specific time TS is set as the on time of the laser module 112 controlled by the optical fiber network device 100. For example, when the laser module 112 in the ONU110a is replaced with a laser module of a different brand, it should be confirmed whether the specific time TS recorded by the storage unit 106 is to be reset. The user may also periodically confirm whether to reset the specific time TS recorded by the storage unit 106 according to the aging condition of the laser module 112.

Referring to fig. 2 and 3 together, fig. 2 is a flowchart illustrating an embodiment of a method for controlling activation or deactivation of a laser module by using a fiber optic network device according to the present application, and fig. 3 is a first example of signals BEN and TXDS generated by performing the method of fig. 2. In step 202, ST1, ET1, ST2 and ET2 in the local control unit 102 are time points T1, T2, T3 and T4, respectively, and when the current time CT has exceeded ST1, it indicates that the current upstream burst is being sent to the opposite end, i.e. OLT 140, and the process proceeds to step 204. In step 204, the control unit 102 determines whether ST2-ET1 is greater than the specific time TS, that is, whether the time duration from the end of the current burst to the start of the next burst is greater than the specific time TS, since T3-T2 in fig. 3 is greater than TS, step 206 is performed, and after the current time CT reaches ET1, that is, when the current burst is over, step 208 is performed and the control unit 102 sets the signal TXDS to 1 to disable the laser module 112, and then step 210 is performed.

Waiting for the current time CT to arrive at ST2-TS, since only a specific time TS remains from the next burst start time, requiring the laser module 112 to be enabled, the process proceeds to step 212 to set TXDS to 0 to enable the laser module 112, and then to step 214, and when waiting for the current time CT to arrive at ST2, the process proceeds to step 216 to update ST1, ET1, ST2, and ET2 of the control unit 102, i.e., to set T3 to ST1, set T4 to ET1, and read the storage unit 104 for the start time and end time of the next burst to be set to ST2 and ET2, respectively, and then back to step 202.

Fig. 4 shows a second example of signals BEN and TXDS generated in response to performing the method of fig. 2. The difference with fig. 3 is that the interval of the two bursts in the second example is less than a certain time TS, so the laser module 112 has no time to disable re-activation in this interval. Referring to fig. 2 and 4, in step 204, the control unit 102 determines that ST2-ET1 is not greater than the specific time TS, so the process proceeds directly to step 214, waits for the current time CT to arrive at ST2, proceeds to step 216 to update ST1, ET1, ST2 and ET2 of the control unit 102, and then returns to step 202 without deactivating the laser module 112.

Table 1 shows the time rate (TXDS time rate) that the laser module 112 enters the deactivated state under the control of the fiber network device 100 in the PON system according to the present application at different upstream transmission rates. It should be noted that the data of table 1 is obtained without the OLT 140 performing power saving control on the laser module 112, and it can be seen from table 1 that the lower the amount of uplink transmission, the more time the laser module 112 can be deactivated.

TABLE 1

Therefore, when the ONUs 110a, 110b, 110c, etc. of the present application are configured in the OLT 140 that does not support or turn on the power saving function, the laser module 112 can be actively enabled or disabled to reduce power consumption. If the OLT 140 supports and turns on the power saving function, the ONUs 110a, 110b, and 110c of the present application may further reduce power consumption.

The previous description briefly presents features of certain embodiments of the application so that those skilled in the art may more fully understand the various embodiments of the disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. It should be understood that the steps mentioned in the method flow chart of the present application, except the sequence specifically described, can be performed simultaneously or partially simultaneously according to the actual requirement. In addition, the above modules or method steps may be implemented by hardware, software or firmware according to the requirements of designers. Those skilled in the art should understand that they can still apply the present disclosure, and that they can make various changes, substitutions and alterations herein without departing from the spirit and scope of the present disclosure.

[ notation ] to show

110a、110b、110c：ONU

100: optical fiber network device

102: control unit

104, 106: storage unit

112: laser module

130: flow divider

140：OLT

ST1, ST 2: starting time

ET1, ET 2: end time

BEN, TXDS: signal

CT: current time of day

TS: at a specific time

202-216: step (ii) of

T1, T2, T3, T4: the time point.

Claims

1. A fiber optic network method, comprising:

receiving uplink burst time configuration information from an opposite terminal; and

and enabling or disabling the laser module at the local end according to the uplink burst time configuration information.

2. The method of claim 1, further comprising:

and controlling the shielding of the laser module to be opened or closed according to the uplink burst time configuration information.

3. A fiber optic network device for controlling a local laser module, comprising:

a storage unit, configured to temporarily store uplink burst time configuration information received from an opposite end; and

and the control unit is used for enabling or disabling the laser module according to the uplink burst time configuration information.

4. The apparatus of claim 3, wherein the control unit is further configured to control the laser module to be shielded on or off according to the upstream burst time configuration information.

5. The apparatus of claim 4, wherein the upstream burst time allocation information records a first start time and a first end time of a first burst and a second start time and a second end time of a second burst.

6. The apparatus of claim 5, wherein the control unit enables or disables the laser module to transmit the first burst and the second burst according to the upstream burst time configuration information.

7. The apparatus of claim 6, wherein the control unit deactivates the laser module from the first end time, wherein a time difference between the second start time and the first end time is greater than a specified time.

8. The apparatus of claim 7, wherein the specific time is a time taken for the laser module to operate normally after being activated from a deactivated state.

9. The apparatus of claim 8, wherein the control unit enables the laser module at a second pre-start time, wherein the second pre-start time is later than the first end time and earlier than the second start time, and a time difference between the second pre-start time and the second start time is not less than the specific time.

10. The apparatus of claim 5, wherein the control unit controls the shield of the laser module to be opened between the first start time and the first end time, and between the second start time and the second end time; controlling the shielding of the laser module to be closed between the first end time and the second start time.