CN112771796B - A method and device for allocating uplink light-emitting time slots to optical network equipment - Google Patents

Abstract

A method and a device for allocating an uplink light-emitting time slot of optical network equipment are used for solving the problems of high adjustment complexity and high cost of adjusting the emission power of an optical network unit in the prior art. In this embodiment of the present application, the order in which each ONT sends the uplink optical signal is determined by comparing the optical power of the uplink optical signal sent by each ONT reaching the OLT, so that the time when the ONT with the higher optical power sends the optical signal is later than the time when the OTN with the lower optical power sends the optical signal.

Description

A method and device for allocating uplink light-emitting time slots to optical network equipment

technical field

The present application relates to the technical field of optical communication, and in particular, to a method and apparatus for allocating uplink light-emitting time slots to optical network equipment.

Background technique

In a time division multiplexing (TDM) passive optical network (PON) system, different optical network devices, such as an optical network termination (ONT) or an optical network unit (ONU) ), under the control of an optical line termination (OLT), the uplink optical signals are sent in different time slots.

The order in which each ONT sends the upstream optical signal is usually determined by the online sequence of each ONT in the system or the order in which the ONT sends the upstream optical signal manually set.

Usually, the difference in the optical power transmitted by each ONT itself is relatively small, but due to the difference in transmission links between different ONTs and OLTs, due to differences in distance, connector, connection quality, etc., the optical signals sent by different ONTs reach the OLT. The optical attenuation is also different, and thus the optical power of the upstream optical signal sent by each ONT to the OLT will also be different.

However, when the optical signals sent by two adjacent ONTs in the order of sending optical signals reach the OLT, if the optical power P1 of the optical signal sent by the previous ONT reaching the OLT is much greater than the optical power P2 of the optical signal sent by the later ONT reaching the OLT, that is, If P1 is much larger than P2, the optical signal received by the OLT and sent by the previous ONT will affect the received optical signal sent by the later ONT, which may cause bit errors or packet loss.

At present, a method of dynamically adjusting the optical power transmitted by each ONT is generally adopted, so that the optical power of the uplink optical signal sent by each ONT reaching the OLT has a small difference in magnitude. This method of dynamically adjusting the transmit optical power of each ONT needs to be adjusted for the optical power of each ONT, and the adjustment is complicated and the cost is high.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a method and apparatus for allocating uplink light-emitting time slots to optical network equipment, which are used to solve the existing problems of high adjustment complexity and high cost when adjusting the transmit optical power of each ONT.

In a first aspect, an embodiment of the present application provides a method for allocating uplink light-emitting time slots to optical network equipment, including:

The optical line terminal OLT obtains the respective optical powers of the multiple optical network devices. The optical power corresponding to the first optical network device is the power at which the OLT receives the optical signal sent by the first optical network device, or the power at which the first optical network device receives the optical signal sent by the OLT, The first optical network device is one of the multiple optical network devices. The optical network device may be an optical network terminal ONT or an optical network unit ONU. The OLT acquires the power at which the first optical network device receives the optical signal sent by the OLT, which may be that the first optical network device notifies the OLT of the power after determining the power of the optical signal sent by the OLT.

After the OLT obtains the optical powers corresponding to the multiple optical network devices, the OLT allocates the optical powers corresponding to the multiple optical network devices to the multiple optical network devices in the dynamic bandwidth allocation DBA cycle for use in the dynamic bandwidth allocation DBA cycle. The uplink light-emitting time slot for sending the uplink optical signal;

Among the plurality of optical network devices, the uplink light-emitting time slot of the jth optical network device for sending the uplink optical signal is earlier than the uplink light-emitting time slot of the j+1th optical network device to send the uplink optical signal, and the jth optical network device transmits the uplink light-emitting time slot of the uplink optical signal earlier. The optical power corresponding to the network device is less than the optical power corresponding to the j+1th optical network device, where j is an integer less than n, where n is equal to the number of optical network devices communicating with the OLT. Alternatively, the multiple optical network devices may also be divided into M groups, one group includes at least one optical network device, and the uplink light-emitting time slot of any optical network device included in the i-th group to send the uplink optical signal is earlier than the i+th light-emitting time slot. Any optical network device included in group 1 sends an uplink light-emitting time slot of an uplink optical signal, and the optical power corresponding to any optical network device included in the i-th group is less than the optical power corresponding to any optical network device included in the i+1-th group, and M is greater than 1 is an integer, i is an integer less than M.

In the embodiment of the present application, the order in which each ONT sends the uplink optical signal is determined by comparing the optical power of the uplink optical signal sent by each ONT to the OLT, so that the ONT with higher optical power sends the optical signal later than the lower optical power. The time when the OTN sends the optical signal. In this way, it is avoided that the ONT with larger optical power transmits before the OTN with smaller optical power, which affects the reception of the optical signal sent by the OTN with smaller optical power. Or group each ONT so that the optical powers in the same group differ little, and the optical signals between the ONTs in the same group will not be affected. The order in which each group sends uplink optical signals is determined based on the grouping result. , so that the ONT with higher optical power sends the optical signal later than the OTN with lower optical power sends the optical signal, which can also prevent the ONT with higher optical power from sending the optical signal before the OTN with lower optical power. The reception of the optical signal sent by the small OTN has an impact.

In a possible design, the DBA period includes a guard time interval, and the guard time interval is located after the upstream light-emitting time slot allocated for the last optical network device that sends the upstream optical signal, or after the first upstream light-emitting time slot that sends the upstream optical signal Before the upstream light-emitting time slot allocated by the optical network equipment of the optical signal. Through the above design, it can be avoided that at the junction of the two DBA uplink periods before and after, the optical signal with higher optical power in the front affects the optical signal with lower optical power in the rear, thereby improving the receiving quality of the optical signal.

In the second aspect, an embodiment of the present application provides a device, which may be an OLT, or other devices that can support the OLT to implement the method, such as a device that can be used in the OLT, and the device includes an acquisition module and an adjustment module, These modules may perform the corresponding functions of the OLT in the first aspect or any one of the design examples of the first aspect, and the OLT may communicate with a plurality of optical network devices. The optical network device is an optical network terminal ONT or an optical network unit ONU, specifically:

an acquisition module, configured to acquire the optical powers corresponding to the multiple optical network devices respectively, wherein the optical power corresponding to the first optical network device is the power of the optical signal sent by the OLT to receive the first optical network device, or receiving the power of the optical signal sent by the OLT for the first optical network device, where the first optical network device is one of the multiple optical network devices;

The adjustment module is configured to allocate, according to the respective optical powers of the plurality of optical network devices, an uplink light-emitting time slot for sending the uplink optical signal in the dynamic bandwidth allocation DBA period to the plurality of optical network devices.

In a possible design, the time when the jth optical network device among the multiple optical network devices sends the uplink optical signal is earlier than the time when the j+1th optical network device sends the uplink optical signal, and the jth optical network device sends the uplink optical signal earlier than the j+1th optical network device. The optical power corresponding to the network device is less than the optical power corresponding to the j+1th optical network device, where j is an integer less than n, where n is equal to the number of optical network devices communicating with the OLT.

In another possible design, the multiple optical network devices are divided into M groups, one group includes at least one optical network device, and any optical network device included in the i-th group sends an uplink optical signal earlier than the i-th optical network device The time when any optical network device included in the +1 group sends the uplink optical signal, and the optical power corresponding to any optical network device included in the i-th group is smaller than the optical power corresponding to any optical network device included in the i+1-th group, M is an integer greater than 1 , i is an integer less than M.

Exemplarily, the DBA period may include a guard time interval, and the guard time interval may be located after the uplink light-emitting time slot allocated for the last optical network device that sends the uplink optical signal, or may be located after the first uplink optical network device that sends the uplink optical signal. Signal before the upstream light-emitting time slot allocated by the optical network equipment.

In a third aspect, an embodiment of the present application further provides a device, which may be an OLT, for implementing the method described in the first aspect; the device may also be another device capable of supporting the OLT to implement the method described in the first aspect, For example, a device that can be provided in an OLT. Wherein, it may be a chip system, a module or a circuit etc. provided in the OLT, which is not specifically limited in this application. The apparatus includes a processor for implementing the function of the OLT in the method described in the first aspect above. The apparatus may also include a memory for storing program instructions and data. The memory is coupled to the processor, and the processor invokes and executes program instructions stored in the memory, so as to implement the function of the OLT in the method described in the first aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices. Exemplarily, the other device is an ONT or an ONU. In this embodiment of the present application, the communication interface may include a circuit, a bus, an interface, a communication interface, or any other device capable of implementing a communication function.

In a fourth aspect, the embodiments of the present application further provide a computer storage medium, where a software program is stored in the storage medium, and the software program can implement the first aspect or the first aspect when read and executed by one or more processors The method of any design of the aspect.

In a fifth aspect, embodiments of the present application provide a computer program product containing instructions, which, when run on a computer, cause the computer to execute the method described in the first aspect or any design of the first aspect.

In a sixth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor, and may also include a memory, for implementing the function of the OLT in the above method. The chip system can be composed of chips, and can also include chips and other discrete devices.

In a seventh aspect, an embodiment of the present application provides a system, where the system includes an OLT and a plurality of ONTs (or ONUs). In one aspect, the ONT is configured to send an optical signal to the OLT, and the OLT is configured to receive the optical signal, and perform the method described in the first aspect or any design of the first aspect based on the optical signal. On the other hand, the OLT sends optical signals to multiple ONTs respectively, and each ONT determines the optical power of the received optical signal and notifies the OLT, so that the OLT performs the first aspect or any one of the first aspect based on the optical power of each ONT Design the method described.

Description of drawings

FIG. 1 is a schematic diagram of an optical communication system architecture provided by an embodiment of the present application;

2 is a schematic flowchart of a method for allocating uplink light-emitting time slots to optical network equipment according to an embodiment of the present application;

3 is a schematic diagram of a sequence of sending uplink optical signals corresponding to different ONT optical powers in a DBA cycle provided by an embodiment of the present application;

4A and 4B are schematic diagrams of a guard time interval provided by an embodiment of the present application;

5 is a schematic diagram of the sequence of sending uplink optical signals corresponding to different ONT optical powers in another DBA cycle provided by an embodiment of the present application;

6A and 6B are schematic diagrams of a guard time interval provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of an apparatus 700 provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of an OLT800 provided by an embodiment of the present application.

Detailed ways

The embodiments of the present invention may be applied to an optical communication system, and the optical communication system may be a TDM PON system. The TDMPON system can be a gigabit-capable PON (GPON) system, an Ethernet passive optical network (ethernet PON, EPON) system, a 10G Ethernet passive optical network (10Gb/s ethernet passive optical network, 10G- EPON) system, 10Gbit passive optical network (10gigabit-capable passive optical network, XG-PON) system or 10Gbit symmetric passive optical network (10-gigabit-capable symmetricpassive optical network, XGS-PON) system and so on.

The optical communication system includes at least an OLT and a plurality of ONTs, and the OLT communicates with the plurality of ONTs respectively. The optical communication system in the embodiment of the present application may also include an OLT and multiple ONUs, and the OLT communicates with the multiple ONUs respectively, which is not specifically limited in the embodiment of the present application, and the ONT is used as an example for description in the following. Referring to Figure 1, the OLT communicates with n ONTs through an optical splitter. In FIG. 1, the n ONTs are respectively ONT1, ONT2, . . . , ONTn.

At present, the order in which each ONT sends the upstream optical signal is usually determined by the online order of each ONT in the system or the order in which the ONT sends the upstream optical signal manually set, that is, in the dynamic bandwidth assignment (dynamically bandwidth assignment, DBA) cycle , the time sequence corresponding to the time slots allocated by the OLT to each ONT is the online order of the ONTs, or the order in which the manually configured ONTs send upstream optical signals. The difference in the optical power emitted by each ONT itself is relatively small, but due to the difference in transmission links between different ONTs and OLTs, due to differences in distance, connector, connection quality, etc., the optical signals sent by different ONTs reach the optical signal of the OLT. The attenuation is also different, and thus the optical power of the upstream optical signals sent by each ONT reaching the OLT will also be different.

When the upstream optical signals sent by two adjacent ONTs in the order of sending optical signals reach the OLT, if the optical power P1 of the upstream optical signal sent by the previous ONT to the OLT is less than the optical power P2 of the optical signal sent by the later ONT to the OLT, That is, P1<P2; or the optical power P1 of the optical signal sent by the previous ONT reaching the OLT is slightly larger than the optical power P2 of the optical signal sent by the later ONT reaching the OLT, that is, P1-P2<power threshold, the power threshold is the previous ONT sent by the OLT. The empirical value that the transmitted signal does not affect the optical signal received by the following ONT. In the above two cases, the transmitted optical signal is basically unaffected.

However, if the optical power P1 of the upstream optical signal sent by the previous ONT reaching the OLT is much greater than the optical power P2 of the upstream optical signal sent by the later ONT reaching the OLT, that is, P1 is much larger than P2, then the upstream optical signal sent by the previous ONT received by the OLT It may affect the received optical signal sent by the later ONT. When receiving the upstream optical signal sent by the later ONT, the OLT discharges the optical power of the previously received ONT. Therefore, the optical power of the upstream optical signal of the previously received ONT is When the power is higher, the discharge time is longer, which has a greater impact on the optical signal received by the following ONT with lower optical power, which may cause bit errors or packet loss.

Taking Figure 1 as an example, the optical power of the upstream optical signal sent by ONT1 to the OLT is P1, the optical power of the upstream optical signal sent by ONT2 to the OLT is P2, and the optical power of the upstream optical signal sent by ONT3 to the OLT is P3. Wherein, the order in which ONT1, ONT2 and ONT3 send upstream optical signals are ONT1, ONT2, ONT3 respectively, P1<P2, P2>P3. The upstream optical signal of ONT1 received by the OLT will not affect the reception of the upstream optical signal of ONT2 by the OLT. Since P2>P3 and the difference between P2 and P3 is large, the upstream optical signal of ONT1 received by the OLT will affect the receiving pair of the OLT. Receive the upstream optical signal of ONT2.

In order to solve the above-mentioned problem, the existing method of dynamically adjusting the transmit optical power of each ONT is generally adopted, so that the optical powers of the optical signals sent by the adjusted ONTs reaching the OLT are equivalent. One way is to configure an optical power range for each ONT in advance, and the ONT adjusts the transmitted optical power according to the optical power of the received optical signal sent by the OLT. For example, if the received optical power is outside the optical power range, And compared with the minimum optical power in the optical power range, it is small, which means that the insertion loss corresponding to the ONT is large. The ONT can increase the transmitted optical power, and vice versa, reduce the transmitted optical power. Another way is that the OLT tests the actual optical power of the optical signals sent by each ONT to the OLT. If the minimum optical power is too small, you can send an instruction to the ONT to instruct the ONT to increase the transmitted optical power; if it is found to be too high, you can send an instruction to the ONT to instruct the ONT to reduce the transmitted optical power. This method of dynamically adjusting the transmit optical power of each ONT needs to be adjusted for multiple ONTs, and may need to be adjusted multiple times, which is highly complex and expensive to adjust.

Based on this, the embodiments of the present application provide a method and apparatus for allocating uplink light-emitting time slots to optical network equipment, so as to solve the problems of high adjustment complexity and high cost in the prior art. In the embodiment of the present application, the order in which each ONT sends the uplink optical signal is determined by comparing the optical power of the uplink optical signal sent by each ONT to the OLT, so that the ONT with higher optical power sends the optical signal later than the lower optical power. The time when the OTN sends the optical signal. Among them, the method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

It should be noted that the plural referred to in this application refers to two or more. In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing the description, and should not be understood as indicating or implying relative importance, nor should it be understood as indicating or implied order.

The solutions provided by the embodiments of the present application will be described in detail below.

Referring to FIG. 2 , it is a schematic flowchart of a method for allocating uplink light-emitting time slots to an optical network device according to an embodiment of the present application. Take the communication between the OLT and n ONTs as an example.

S201, the OLT acquires the optical powers corresponding to the n ONTs respectively. Wherein, the optical power corresponding to the jth ONT is the received optical power for the communication between the OLT and the jth ONT. j is an integer less than n.

Exemplarily, the received optical power of the communication between the OLT and the jth ONT may be the power at which the OLT receives an optical signal sent by the jth ONT, or the jth ONT receives the OLT. The power of the optical signal sent by the OLT.

Further, obtaining the optical powers corresponding to the n ONTs by the OLT may be implemented in the following manner:

method one:

The OLT measures the optical power of the received optical signals respectively sent by the n ONTs.

Method two:

The OLT receives the optical power of the optical signal sent back by the ONT received by each ONT among the n ONTs. Exemplarily, the jth ONT measures the received optical power of the optical signal sent by the OLT, and feeds back the measured optical power to the OLT.

S202, the OLT allocates, according to the optical powers corresponding to the n ONTs respectively, to the plurality of ONTs an uplink light-emitting time slot used for sending an uplink optical signal in the DBA cycle.

After the OLT allocates the upstream light-emitting time slot to the n ONTs, it notifies each ONT respectively, so that each ONT sends the upstream optical signal to the OLT based on the upstream light-emitting time slot allocated by the OLT.

In a possible implementation manner, the OLT allocates uplink light-emitting time slots for sending uplink optical signals in the DBA cycle to the plurality of ONTs according to the optical powers corresponding to the n ONTs, which may be the OLT according to the n ONTs. The order of the size of the optical powers corresponding to the ONTs, respectively, allocates the uplink light-emitting time slots for sending the uplink optical signals in the DBA cycle to the plurality of ONTs.

Among the n ONTs, the time when the jth ONT sends the uplink optical signal is earlier than the time when the j+1th ONT sends the uplink optical signal, and the optical power corresponding to the jth ONT is less than the j+1th ONT For the corresponding optical power, j is an integer less than n.

In addition, the time when the jth ONT among the n ONTs sends the upstream optical signal is earlier than the time when the j+1th ONT sends the upstream optical signal, which can be described as the jth ONT among the n ONTs sending the upstream optical signal The upstream light-emitting time slot of j+1 is earlier than the upstream light-emitting time slot of the j+1 th ONT sending the upstream optical signal.

Illustratively, taking 4 ONTs as an example, the order of received optical power corresponding to the 4 ONTs is shown in FIG. 3 . In FIG. 3 , the received optical power corresponding to each ONT is indicated by the height of the rectangular frame, that is, ONT3 < ONT1 < ONT 4 < ONT 2 .

Based on this, the time sequence of the uplink light-emitting time slots allocated by the OLT to the four ONTs is shown in FIG. 3 .

In addition, in order to prevent the optical signal with higher optical power in the front from affecting the optical signal with lower optical power in the back at the junction of the two DBA uplink periods before and after, a guard time interval can be configured in the DBA period. The guard time interval may be located at the end of the DBA period, that is, after the upstream light-emitting time slot allocated for the last OTN that sends the upstream optical signal. The guard time interval can also be located at the head of the DBA cycle, that is, it can also be located before the upstream light-emitting time slot allocated for the first ONT that sends the upstream optical signal. Taking the time sequence of the uplink light-emitting time slots allocated for 4 ONTs as shown in FIG. 3 as an example, when the guard time interval is located at the end of the DBA cycle, referring to FIG. 4A , the guard time interval is located at the latest in the DBA cycle. After the upstream light-emitting time slot allocated by the ONT2 that sends the upstream optical signal. If the guard interval is located at the head of the DBA cycle, as shown in FIG. 4B , the guard interval is located before the upstream light-emitting time slot allocated for the ONT3 that sends the upstream optical signal earliest in the DBA cycle.

The guard time interval is not allocated to any ONT for sending upstream optical signals. Therefore, the OLT can realize the switching and adjustment from the optical signal with higher optical power to the optical signal with lower optical power in the guard time interval, so as to avoid the optical signal with higher optical power in front of the adjacent optical signal with lower optical power. effect on the reception of the signal.

In another possible implementation manner, the OLT allocates an uplink light-emitting time slot for sending an uplink optical signal to the n ONTs in the DBA cycle according to the optical powers corresponding to the n ONTs respectively, or the OLT may be based on n ONTs. The optical powers corresponding to the ONTs respectively group the n ONTs. For example, n ONTs are divided into M groups, and each group includes at least one ONT. Each group corresponds to an optical power range, and there is no overlap between the optical power ranges corresponding to different groups. The time sequence of the uplink light-emitting time slots allocated to each group is the order of the optical power ranges from small to large. In other words, the time when any ONT included in the i-th group sends the upstream optical signal is earlier than the time when any ONT included in the i+1-th group sends the upstream optical signal, and the optical power corresponding to any ONT included in the i-th group is less than the optical power corresponding to any ONT included in the i+1th group, where i is an integer less than M.

Among them, when the optical power corresponding to the n ONTs is divided into multiple ranges, it can be ensured that the influence between the optical signal corresponding to the maximum optical power and the optical signal corresponding to the minimum optical power belonging to the same range is acceptable to the system. .

Exemplarily, take the optical power corresponding to the n ONTs divided into two optical power ranges as an example. For example, a value less than a certain optical power is called a small optical segment, and an optical power value greater than or equal to this value is called a large optical segment. The ONTs whose optical power values are located in the small optical segment belong to one group, and the ONTs whose optical power values are located in the large optical segment belong to another group. For convenience of description, the group to which the ONTs whose optical power values are located in the small optical segment belong is called the small optical segment group, and the group to which the ONTs whose optical power value is located in the large optical segment belongs is called the large optical segment group. When the OLT allocates the upstream light-emitting time slots to the ONTs belonging to the same group, it may not limit the arrangement order of the light-emitting time slots of the OTNs in the group, and may determine the upstream light-emitting time slots of the OTNs included in the group according to the online order of the ONTs included in the group The chronological order of the time slots. Of course, the time sequence of the uplink light-emitting time slots of the ONTs included in the group can also be customized, which is not specifically limited in this embodiment of the present application.

For example, for the ONTs belonging to the small optical segment group, the chronological order of the uplink light-emitting time slots of the ONTs included in the small optical segment group can be taken as the chronological order of the ONTs included in the small optical segment group from front to back. For group ONTs belonging to a large optical segment, the chronological sequence of the upstream light-emitting time slots of the ONTs included in the large optical segment group can be taken according to the back-to-front arrangement order of the online ONTs included in the large optical segment group.

Exemplarily, taking 4 ONTs as an example, they are ONT1-ONT4, ONT1 and ONT3 belong to the small optical segment group, and ONT2 and ONT4 belong to the large optical segment group. The order of the received optical power corresponding to the four ONTs is ONT3 < ONT1 < ONT 4 < ONT2 . For the ONTs included in the same group, the following is an example of determining the time sequence of the allocated upstream light-emitting time slots based on the online sequence. For example, the online sequence of four ONTs is ONT1, ONT2, ONT3, and ONT4.

ONT1 belongs to the small optical segment group, and the upstream light-emitting time slot allocated to ONT1 has the earliest time in the DBA cycle. ONT2 belongs to the large optical segment group, and the upstream light-emitting time slot allocated to ONT1 is the latest in the DBA cycle. ONT3 belongs to the small optical segment group, the upstream light-emitting time slot allocated to ONT3 is located after the upstream light-emitting time slot of ONT1, and ONT4 belongs to the large optical segment group, the upstream light-emitting time slot allocated to ONT4 is located before the upstream light-emitting time slot of ONT2. But not earlier than the upstream light-emitting time slot allocated by ONT3, as shown in FIG. 5 . In FIG. 5 , the received optical power corresponding to each ONT is indicated by the height of the rectangular frame. It should be noted that although the optical power of ONT3 is smaller than that of ONT1, ONT3 and ONT1 belong to the same group, and the optical signals of ONTs in the same group have little influence and can be ignored. Therefore, it is not necessary to adjust ONT3 to ONT1. Instead put it after ONT1.

In addition, in order to prevent the optical signal with higher optical power in the front from affecting the optical signal with lower optical power in the back at the junction of the two DBA uplink periods before and after, a guard time interval can be configured in the DBA period. The guard time interval may be located at the end of the DBA period, that is, after the upstream light-emitting time slot allocated for the last OTN that sends the upstream optical signal. The guard time interval can also be located at the head of the DBA cycle, that is, it can also be located before the upstream light-emitting time slot allocated for the first ONT that sends the upstream optical signal. Taking the time sequence of the uplink light-emitting time slots allocated for 4 ONTs as shown in FIG. 5 as an example, when the guard time interval is located at the end of the DBA cycle, referring to FIG. 6A , the guard time interval is located at the latest in the DBA cycle. After the upstream light-emitting time slot allocated by the ONT2 that sends the upstream optical signal. If the guard interval is located at the head of the DBA cycle, as shown in FIG. 6B , the guard interval is located before the upstream light-emitting time slot allocated for the ONT1 that sends the upstream optical signal earliest in the DBA cycle.

Based on the same inventive concept as the above-mentioned embodiment, the embodiment of the present application further provides an apparatus. The device is applied to OLT. Specifically, the apparatus may be a processor, a chip, a chip system, or a functional module for sending, or the like. As shown in FIG. 7 , the apparatus includes an acquisition module 701 and an adjustment module 702 , wherein the acquisition module 701 is used to execute S201 , and the adjustment module 702 is used to execute S202 . Optionally, the above two modules may also perform other related optional steps performed by the OLT mentioned in any of the foregoing embodiments, which will not be repeated here.

The division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into one processor, or may exist physically alone, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.

This embodiment of the present application further provides an OLT structure. As shown in FIG. 8 , the OLT 800 includes a communication interface 810 , a processor 820 and a memory 830 .

The acquisition module 701 and the adjustment module 702 shown in FIG. 7 can be implemented by the processor 820 . The processor 820 receives the optical signal through the communication interface 810 and is used to implement the method performed by the OLT in FIG. 2 . In the implementation process, the steps of the processing flow may be implemented by the hardware integrated logic circuit in the processor 820 or the instructions in the form of software to complete the method executed by the OLT in any of the foregoing embodiments.

In this embodiment of the present application, the communication interface 810 may be a circuit, a bus, a transceiver, or any other device that can be used for information interaction. Wherein, for example, the other device may be a device connected to the device 800, for example, the other device may be an ONT or an ONU.

In this embodiment of the present application, the processor 820 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which may be implemented or executed The methods, steps, and logical block diagrams disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software units in the processor. The program codes executed by the processor 820 for implementing the above method may be stored in the memory 830 . Memory 830 is coupled to processor 820 . The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. Processor 820 may cooperate with memory 830 . The memory 830 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or may be a volatile memory (volatile memory), such as a random access memory (random- access memory, RAM). Memory 830 is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

The specific connection medium between the communication interface 810 , the processor 820 , and the memory 830 is not limited in the embodiments of the present application. In the embodiment of the present application, the memory 830, the processor 820, and the communication interface 810 are connected through a bus in FIG. 8. The bus is represented by a thick line in FIG. 8. The connection mode between other components is only for schematic illustration. It is not limited. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 8, but it does not mean that there is only one bus or one type of bus.

Based on the above embodiments, the embodiments of the present application may further provide a system including an OLT and a plurality of ONTs (or ONUs). The OLT is used to send optical signals to the ONT or receive optical signals sent by the ONT.

In a possible implementation manner, the ONT sends an optical signal to the OLT, and the OLT executes the method performed by the OLT in any of the foregoing embodiments for the received optical signal sent by the ONT, and obtains the optical signal that receives the optical signals sent by multiple ONTs. Therefore, according to the optical power, each ONT is allocated an uplink light-emitting time slot in the DBA period. For a specific allocation method, reference may be made to the detailed descriptions in the above method embodiments, which will not be repeated here. The OLT will notify each ONT of the uplink light-emitting time slot allocated to each ONT. Therefore, the ONT receives the notification information sent by the OLT for notifying the uplink transmission time slot. The ONT sends the uplink optical signal at the corresponding time according to the notification information.

In a possible implementation manner, the ONT receives the optical signal sent by the OLT, determines the optical power of the received signal according to the received optical signal, and sends the optical power to the OLT. Therefore, the OLT allocates uplink light-emitting time slots to multiple ONTs in the DBA cycle according to the optical power sent by each ONT. For a specific allocation method, refer to the detailed description in the above method embodiments, which will not be repeated here. The OLT will notify each ONT of the uplink light-emitting time slot allocated to each ONT. Therefore, the ONT receives the notification information sent by the OLT for notifying the uplink transmission time slot. The ONT sends the uplink optical signal at the corresponding time according to the notification information.

Based on the above embodiments, the embodiments of the present application further provide a computer storage medium, where a software program is stored in the storage medium, and when the software program is read and executed by one or more processors, it can implement any one or more of the above Methods provided by the examples. The computer storage medium may include: U disk, removable hard disk, read-only memory, random access memory and other media that can store program codes.

Based on the above embodiments, an embodiment of the present application further provides a chip, where the chip includes a processor for implementing the functions involved in any one or more of the above embodiments, such as acquiring or processing the data frames involved in the above method . Optionally, the chip further includes a memory, and the memory is used for necessary program instructions and data to be executed by the processor. The chip may consist of chips, or may include chips and other discrete devices.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims (8)

1. A method for allocating an uplink light-emitting time slot to an optical network device, comprising:

an Optical Line Terminal (OLT) acquires optical power corresponding to a plurality of optical network devices respectively, wherein the optical power corresponding to a first optical network device is the power of the OLT for receiving an optical signal sent by the first optical network device, or the power of the first optical network device for receiving the optical signal sent by the OLT, and the first optical network device is one of the plurality of optical network devices;

the OLT allocates uplink light-emitting time slots for the plurality of optical network devices to send uplink optical signals in a Dynamic Bandwidth Allocation (DBA) period according to the optical power respectively corresponding to the plurality of optical network devices;

the plurality of optical network devices are divided into M groups, one group includes at least one optical network device, an uplink light-emitting time slot, in which any optical network device included in the ith group sends an uplink optical signal, is earlier than an uplink light-emitting time slot, in which any optical network device included in the (i + 1) th group sends an uplink optical signal, optical power corresponding to any optical network device included in the ith group is smaller than optical power corresponding to any optical network device included in the (i + 1) th group, M is an integer greater than 1, and a value of i is an integer smaller than M.

2. The method of claim 1, wherein the DBA period comprises a guard time interval, and wherein the guard time interval is located after an uplink light-emitting time slot allocated to a last optical network device transmitting the uplink optical signal or before an uplink light-emitting time slot allocated to a first optical network device transmitting the uplink optical signal.

3. The method according to claim 1 or 2, wherein the optical network device is an optical network terminal ONT or an optical network unit ONU.

4. An allocation device for upstream light-emitting time slots of optical network equipment, which is applied to an Optical Line Terminal (OLT), comprises:

an obtaining module, configured to obtain optical powers corresponding to multiple optical network devices, where an optical power corresponding to a first optical network device is a power of an optical signal sent by the first optical network device and received by the OLT, or a power of an optical signal sent by the OLT and received by the first optical network device, and the first optical network device is one of the multiple optical network devices;

the adjusting module is used for allocating uplink light-emitting time slots for transmitting uplink optical signals in a Dynamic Bandwidth Allocation (DBA) cycle to the optical network devices according to optical power cycles respectively corresponding to the optical network devices;

the plurality of optical network devices are divided into M groups, one group includes at least one optical network device, an uplink light-emitting time slot, in which any optical network device included in the ith group sends an uplink optical signal, is earlier than an uplink light-emitting time slot, in which any optical network device included in the (i + 1) th group sends an uplink optical signal, optical power corresponding to any optical network device included in the ith group is smaller than optical power corresponding to any optical network device included in the (i + 1) th group, M is an integer greater than 1, and a value of i is an integer smaller than M.

5. The apparatus of claim 4, wherein the DBA period comprises a guard time interval after an uplink light-emitting time slot allocated for a last optical network device transmitting the uplink optical signal or before an uplink light-emitting time slot allocated for a first optical network device transmitting the uplink optical signal.

6. The apparatus according to claim 4 or 5, wherein the optical network device is an optical network terminal ONT or an optical network unit ONU.

7. An optical line terminal comprising a processor and a memory, wherein:

the memory is used for storing program codes;

the processor is used for reading and executing the program codes stored in the memory so as to realize the method of any one of claims 1 to 3.

8. A passive optical network, PON, system comprising an OLT according to any of claims 1-3 and a plurality of optical network devices in communication with the OLT.

Images