CN115643501A

CN115643501A - Bandwidth allocation method, OLT, ONU, terminal and storage medium

Info

Publication number: CN115643501A
Application number: CN202110815096.7A
Authority: CN
Inventors: 张伟良
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2023-01-24
Also published as: WO2023000870A1

Abstract

The application provides a bandwidth allocation method, an OLT, an ONU, a terminal and a storage medium, and relates to the field of passive optical networks. The bandwidth allocation method is applied to an optical line terminal OLT, the OLT is in communication connection with a plurality of optical network units ONU, and the method comprises the following steps: receiving an allocation request and/or service data sent by the ONU through a preset bandwidth channel; if the ONU identification can be identified, allocating a corresponding bandwidth for the ONU corresponding to the ONU identification according to an allocation request and/or service data; and if the ONU identification cannot be identified, distributing corresponding bandwidth for one or a plurality of Optical Network Units (ONUs) according to a preset bandwidth channel. Therefore, the allocation request sent by the ONU can be received through the preset bandwidth channel, the required bandwidth is allocated to the ONU quickly, the bandwidth allocation efficiency of the ONU is improved, and the time delay of ONU service transmission is reduced.

Description

Bandwidth allocation method, OLT, ONU, terminal and storage medium

Technical Field

The embodiment of the application relates to the field of passive optical networks, in particular to a bandwidth allocation method, a terminal and a storage medium.

Background

In the uplink bandwidth allocation method of the latest generation broadband Passive Optical network (GPON) series of telecommunication standard substations, an uplink bandwidth is allocated to a Transmission Container (T-CONT), an Optical Line Terminal (OLT) sets the bandwidth type in the uplink T-CONT to be a fixed bandwidth, a guaranteed bandwidth, a non-guaranteed bandwidth, a best effort bandwidth and the like, and different types of services obtain the uplink bandwidth through different T-CONT transmitters and send the services through the uplink bandwidth in response. When the Optical Network Unit (ONU) has no corresponding service, the bandwidths are allocated to the T-CONT of other ONUs, and when the ONU has the corresponding service recovery, the bandwidths are reallocated to the T-CONT of the ONU, so that the allocation mode improves the utilization rate of bandwidth resources to a certain extent.

However, when a traditional bandwidth allocation method is used for allocating bandwidth to an ONU, but when a service is guaranteed to restart, in the process of guaranteeing that the bandwidth is reallocated to the T-CONT of the ONU, because the bandwidth of the OLT is allocated with a certain scheduling period, the bandwidth is reallocated after the certain scheduling period, it is only possible to allocate a part of the bandwidth to the T-CONT of the ONU for the ONU to send the service or report a service bandwidth request, and the ONU cannot perform service transmission within the scheduling period, which causes a large delay when the ONU performs service transmission, and reduces user experience.

Disclosure of Invention

The main purpose of the embodiments of the present application is to provide a bandwidth allocation method, an OLT, an ONU, a terminal, and a storage medium, so as to avoid a problem that the ONU cannot perform service transmission in a scheduling period, and further cause a large time delay when the ONU performs service transmission, thereby improving user experience.

In order to achieve the above object, an embodiment of the present application provides a bandwidth allocation method, which is applied to an optical line terminal OLT, where the OLT is in communication connection with a plurality of optical network units ONU, and the method includes: receiving an allocation request and/or service data sent by the ONU through a preset bandwidth channel; if the ONU identification can be identified, allocating a corresponding bandwidth for the ONU corresponding to the ONU identification according to an allocation request and/or service data; and if the ONU identification cannot be identified, distributing corresponding bandwidth for one or a plurality of ONUs according to a preset bandwidth channel.

In order to achieve the above object, an embodiment of the present application further provides a bandwidth allocation method, which is applied to an optical network unit ONU, and the method includes: and if the bandwidth required by the service flow of the ONU is larger than the bandwidth allocated to the ONU by an Optical Line Terminal (OLT), transmitting an allocation request and/or service data to the OLT through a preset bandwidth channel.

In order to achieve the above object, an embodiment of the present application further provides an OLT, where the OLT is communicatively connected to a plurality of optical network units ONU, and the OLT includes: the receiving module is used for receiving the allocation request and/or the service data sent by the ONU through a preset bandwidth channel; the distribution module is used for distributing corresponding bandwidth to the ONU corresponding to the ONU identification according to the distribution request and/or the service data if the ONU identification can be identified; and if the ONU identification cannot be identified, distributing corresponding bandwidth for the one or the plurality of optical network units ONU according to the preset bandwidth channel.

In order to achieve the above object, an embodiment of the present application further provides an ONU, including: a detection module, configured to detect whether a bandwidth required by a service traffic of the ONU is greater than a bandwidth allocated to the ONU by an optical line terminal OLT; and the sending module is used for sending an allocation request and/or service data to the OLT through a preset bandwidth channel after the detection module detects that the bandwidth required by the service flow of the ONU is larger than the bandwidth allocated to the ONU by the OLT.

In order to achieve the above object, an embodiment of the present application further provides a terminal, including:

at least one processor; and the number of the first and second groups,

a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the above-described bandwidth allocation method applied to the OLT or to perform the above-described bandwidth allocation method applied to the ONU.

In order to achieve the above object, an embodiment of the present application further provides a computer-readable storage medium storing a computer program, where the computer program is configured to implement the above bandwidth allocation method applied to the OLT or the above bandwidth allocation method applied to the ONU when executed by a processor.

According to the bandwidth allocation method, the terminal and the storage medium, in the process that the OLT allocates the bandwidth for the ONU which is in communication connection with the OLT, the allocation request and/or the service data sent by the ONU are/is received through the preset bandwidth channel; if the ONU identification can be identified, allocating a corresponding bandwidth for the ONU corresponding to the ONU identification according to the allocation request and/or the service data; and if the ONU identification cannot be identified, distributing corresponding bandwidth for the one or the plurality of ONUs according to a preset bandwidth channel. The method and the device can preset corresponding bandwidth channels for each ONU, so that the ONU can send an allocation request or service data to the OLT through the bandwidth channels when service transmission is required, the OLT quickly responds after receiving the allocation request or the service data, the corresponding bandwidth is allocated for the ONU, and the next scheduling period of bandwidth allocation does not need to be waited, thereby improving the efficiency of bandwidth allocation of the ONU, reducing the time delay of ONU service transmission, and solving the technical problem that the bandwidth allocation in the prior art can re-allocate bandwidth to the ONU after a certain scheduling period, so that the ONU cannot perform service transmission in the scheduling period, and further generate larger time delay in service transmission.

Drawings

One or more embodiments are illustrated by the corresponding figures in the drawings, which are not meant to be limiting.

Fig. 1 is a first flowchart of a bandwidth allocation method provided in an embodiment of the present application;

fig. 2 is a second flowchart of a bandwidth allocation method provided in the embodiment of the present application;

fig. 3 is a flow chart three of a bandwidth allocation method provided in the embodiment of the present application;

fig. 4 is a fourth flowchart of a bandwidth allocation method provided in an embodiment of the present application;

fig. 5 is a fifth flowchart of a bandwidth allocation method provided in an embodiment of the present application;

fig. 6 is a sixth flowchart of a bandwidth allocation method provided in an embodiment of the present application;

fig. 7 is a seventh flowchart of a bandwidth allocation method provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of an OLT according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of an ONU according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a terminal according to an embodiment of the present application.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in the examples of the present application, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present application, and the embodiments may be mutually incorporated and referred to without contradiction.

The embodiment of the application relates to a bandwidth allocation method, which is applied to an optical line terminal OLT, wherein the OLT is in communication connection with a plurality of optical network units ONU, and as shown in figure 1, the method specifically comprises the following steps:

step 101, receiving an allocation request and/or service data sent by an ONU through a preset bandwidth channel.

Specifically, a bandwidth channel may be pre-allocated to an ONU through a Management channel such as a network Management unit (ONU Management and Control Interface, OMCI for short), a physical layer operation and Management maintenance (PLOAM for short) channel, a bandwidth allocation map (BWmap for short), and the like, where a corresponding relationship between an ONU and a bandwidth channel may be a one-to-one relationship or a one-to-many relationship, and each ONU may send an allocation request and/or service data to the OLT on the corresponding bandwidth channel when a transmission service is recovered.

In an example, a bandwidth channel may be allocated to each ONU without bandwidth allocation through a management channel in advance, specifically, an independent bandwidth channel may be allocated to each ONU without bandwidth allocation, where the bandwidth channels correspond to the ONUs one to one; or after the ONUs which are not allocated with the bandwidth are grouped, allocating a bandwidth channel to each ONU group, wherein the bandwidth channels correspond to the ONU groups one by one, and each ONU in the same ONU group shares one bandwidth channel. When the ONU needs to recover service transmission, if the ONU exclusively shares one bandwidth channel, the OLT receives an allocation request and/or service data sent by the ONU through the exclusively shared bandwidth channel in the step; if the ONU shares one bandwidth channel with other ONUs, in this step, the OLT receives the allocation request and/or the service data sent by the ONU through the bandwidth channel corresponding to the ONU group to which the ONU belongs.

Step 102, judging whether the ONU identification can be identified. The ONU identifier refers to an associated identifier that can uniquely identify the ONU, such as ONU-ID, alloc-ID, port-ID, etc., which are not limited herein.

In an example of receiving the service data through the bandwidth channel, if the OLT receives the service data through the dedicated bandwidth channel, the OLT may identify the corresponding ONU identifier according to the bandwidth channel through the one-to-one correspondence between the bandwidth channel and the ONU, or analyze the ONU identifier from the service data, and then enter step 103. If the OLT receives the service data through the shared bandwidth channel, because the bandwidth channel corresponds to one ONU group and the corresponding ONU group has multiple ONUs without bandwidth allocation, when only one ONU sends the service data or the service data sent by multiple ONUs do not overlap with each other, the OLT can identify the ONU indication from the corresponding service data, and step 103 is performed, but when the service data sent by multiple ONUs overlap with each other, the OLT may not identify which ONU in the ONU group sent the service data, and then it is determined that the ONU identification cannot be identified, and step 104 is performed.

In an example of receiving an allocation request through a bandwidth channel, in the allocation request received by an OLT, each byte of the allocation request needs to be determined to see whether the allocation request carries an ONU identifier, when the allocation request carries the ONU identifier and correctly resolves the ONU identifier, step 103 is performed, and when the allocation request does not carry the ONU identifier, or when the bandwidth channel transmitting the allocation request corresponds to multiple ONUs and cannot identify the ONU identifier, step 104 is performed. In another example, if the bandwidth channel corresponds to one ONU, the OLT may recognize that the received allocation request is an allocation request sent by the ONU corresponding to the bandwidth channel, and perform step 103.

Step 103, allocating a corresponding bandwidth to the ONU corresponding to the ONU identifier according to the allocation request and/or the service data, for example, allocating a corresponding guaranteed bandwidth to the ONU corresponding to the ONU identifier.

In an example, if the allocation request is received through a preset bandwidth channel, and the OLT can recognize the ONU identifier, which indicates that the OLT can know which ONU the allocation request is sent from, if the allocation request carries the size of the allocated bandwidth, the OLT directly allocates a corresponding bandwidth to the ONU sending the allocation request according to the size of the allocated bandwidth in the allocation request, and if the allocation request does not carry the size of the allocated bandwidth, the OLT may allocate a default bandwidth to the ONU sending the allocation request, for example, allocate guaranteed bandwidths of all the ONUs to the ONU.

In another example, if the service data is received through a preset bandwidth channel and the OLT can recognize the ONU identifier, the ONU that transmits the service data through the bandwidth channel is allocated with a corresponding bandwidth according to the amount of the received service data. And under the condition that the ONU sends the service data to the OLT through a preset bandwidth channel, the ONU can also send an allocation request according to the requirement.

That is to say, when the ONU needs to resume service transmission, an allocation request is sent to the OLT through its corresponding bandwidth channel to instruct the OLT to allocate a guaranteed bandwidth to the ONU. In addition, the allocation request may also carry information about the size of the allocated bandwidth, that is, the ONU notifies the OLT of the size of the bandwidth required by the ONU through a bandwidth signaling. In another example, the ONU may directly send the service data through the preset bandwidth channel when there is transmission service recovery, so as to instruct the OLT to allocate the guaranteed bandwidth to the ONU. That is, if the OLT detects the burst traffic in the preset bandwidth channel, the OLT allocates a guaranteed bandwidth to the ONU, and in addition, the OLT may calculate the bandwidth size required by the ONU according to the burst traffic.

In another example, if all the service data received through the preset bandwidth channel are idle frames, it indicates that the bandwidth allocated to the corresponding ONU is too large, and the bandwidth allocated to the corresponding ONU can be reduced to improve the bandwidth utilization.

Step 104, allocating corresponding bandwidths to one or several ONUs according to the preset bandwidth channel, for example, allocating bandwidths with guaranteed bandwidth sizes to ONUs related to the preset bandwidth channel.

In one example, when a bandwidth channel corresponds to multiple ONUs in an ONU group, and the OLT does not know which ONU the allocation request is sent from, a corresponding bandwidth needs to be allocated to one or more ONUs in the ONU group corresponding to the bandwidth channel, so as to ensure that the ONUs that need to perform service transmission can obtain the corresponding bandwidth for performing service transmission. For example, when a bandwidth channel corresponds to one ONU group, if there is an ONU allocated with a corresponding bandwidth among the corresponding ONUs, the corresponding guaranteed bandwidth is allocated to the remaining ONUs not allocated with the corresponding bandwidth.

In an example, after allocating a corresponding bandwidth to one or several ONUs according to a preset bandwidth channel, bandwidth status information and service traffic information returned by several ONUs may also be received.

Specifically, since not every ONU needs to perform traffic transmission, a part of bandwidth resources are wasted, and therefore, bandwidth status information and traffic information returned by each ONU may be received after allocating bandwidths to all ONUs, where the bandwidth status information indicates whether or not a spare bandwidth exists in the bandwidths used by the ONU, and if the spare bandwidth exists, which part of the bandwidths is spare, and the traffic information indicates how much bandwidth the ONU needs to transmit the remaining traffic. And adjusting the bandwidth ranges corresponding to the plurality of optical network units ONU according to the bandwidth state information and the service flow information.

Specifically, when receiving the bandwidth status information and the traffic information returned by the ONUs, the OLT automatically adjusts the bandwidth range corresponding to each ONU according to the idle degree and the required bandwidth of each ONU. After bandwidths are allocated to a plurality of ONUs in a scene that no ONU identification is carried in an allocation request or no ONU identification is identified, the bandwidth range of each ONU is dynamically adjusted according to bandwidth state information and service flow information returned by each ONU, and the bandwidth ranges in the embodiment of the application all comprise position and size information, so that the utilization rate of bandwidth resources is further improved

In another example, before receiving the allocation request and/or the service data sent by the ONU through the preset bandwidth channel, the method further includes: and sending the bandwidth range corresponding to the bandwidth channel to the ONU, and if a channel response message returned by the ONU through the bandwidth channel is not received, continuing to send the bandwidth range corresponding to the bandwidth channel to the ONU. That is to say, after the OLT sends the bandwidth range of the bandwidth channel corresponding to each ONU to the corresponding ONU, if the ONU has service data to transmit, the OLT sends an allocation request and/or the service data through the allocated bandwidth channel, where the sent allocation request and/or the service data are equivalent to a channel response message, and after receiving the channel response message returned by the ONU, the OLT determines that the ONU corresponding to the bandwidth channel needs to allocate bandwidth, and triggers step 102. And if the ONU does not have the service data to be transmitted, the OLT cannot receive a channel response message returned by the ONU, and continuously sends the bandwidth range corresponding to the bandwidth channel to the ONU so as to ensure that a subsequent ONU can send an allocation request and/or the service data through the bandwidth channel when the service data needs to be recovered.

In this embodiment, in a process that an OLT allocates a bandwidth to an optical network unit ONU in communication connection with the OLT, an allocation request and/or service data sent by the ONU are received through a preset bandwidth channel; if the ONU identification can be identified, allocating a corresponding bandwidth for the ONU corresponding to the ONU identification according to the allocation request and/or the service data; if the ONU identification cannot be identified, allocating corresponding bandwidths to the one or the plurality of ONUs according to the preset bandwidth channel, so that the ONUs can request the bandwidth from the OLT through the bandwidth channel when service transmission is required, and the OLT can quickly respond after receiving allocation requests and/or service data and allocate the corresponding bandwidths to the ONUs; the method and the device can improve the efficiency of bandwidth allocation of the ONU, reduce the time delay of ONU service transmission, and solve the technical problems that the bandwidth allocation in the prior art cannot allocate the bandwidth to the ONU again after a certain scheduling period, so that the ONU cannot transmit the service in the scheduling period, and further generate larger time delay during service transmission.

The embodiment of the present application relates to a bandwidth allocation method, which is applied to an optical line terminal OLT, where the OLT is in communication connection with a plurality of optical network units ONU, and in this embodiment, the ONUs are in one-to-one correspondence with bandwidth channels, as shown in fig. 2, and specifically includes the following steps:

step 201, selecting a part of guaranteed bandwidth from the guaranteed bandwidth range corresponding to the ONU as a bandwidth channel corresponding to the ONU.

Specifically, before configuring a bandwidth channel for each ONU, a corresponding guaranteed bandwidth, non-guaranteed bandwidth, or best effort bandwidth is already allocated for each ONU, and when configuring a bandwidth channel for each ONU currently not allocated with a bandwidth through a management channel such as a network management unit, OMCI, PLOAM, BWmap, or the like, a bandwidth range of the guaranteed bandwidth corresponding to each ONU may be obtained first, and a part of bandwidth is selected from the bandwidth range of the guaranteed bandwidth corresponding to the ONU as a bandwidth range of the bandwidth channel of the ONU, where the size of the selected part of bandwidth may be enough to allow the ONU to just send a physical layer operation management maintenance message in the part of bandwidth, or only allow the ONU to send a signal of several bytes; the bandwidth channel configured in this way may be referred to as a reserved bandwidth, and if the bandwidth range of the guaranteed bandwidth corresponding to the ONU cannot be obtained, a part of bandwidth may be selected from the non-guaranteed bandwidth or the best effort bandwidth corresponding to the ONU as the bandwidth range of the bandwidth channel of the ONU, where the bandwidth range includes the location and size information. The bandwidth channel selected in this way is in a one-to-one relationship with the ONU, and the bandwidth channel may be fixed in position, fixed in duration, and configured to the ONU all the time, and may also be configured flexibly according to the scheduling condition of the bandwidth inside the OLT, and the format of the bandwidth channel is shown in table 1:

table 1 format of bandwidth channel when the corresponding relationship between the bandwidth channel and the ONU is one-to-one

Wherein, alloc-ID refers to the identification of T-CONT corresponding to ONU, flags refers to configuration parameters, startTime refers to the starting position of bandwidth channel, the GrantTime refers to the size of a bandwidth channel, the FWI refers to Forced Wakeup Indication, the Burst Profile refers to uplink Burst configuration, and the HEC refers to message verification.

Step 202, receiving an allocation request and/or service data sent by an ONU through a bandwidth channel.

Specifically, this step is substantially the same as step 101 in the embodiment of the present invention, and is not described herein again.

Step 203, judging whether the ONU identification can be identified.

Specifically, this step is substantially the same as step 102 in the embodiment of the present invention, and is not repeated here.

And step 204, allocating a corresponding bandwidth to the ONU corresponding to the ONU identification.

Specifically, this step is substantially the same as step 103 in the embodiment of the present invention, and is not described herein again. .

Step 205, allocating corresponding bandwidths to one or several optical network units ONU.

Specifically, this step is substantially the same as step 104 in the embodiment of the present invention, and is not repeated herein.

In this embodiment, on the basis of other embodiments, a corresponding bandwidth channel may be set for each ONU in communication connection with the OLT, so that it can be ensured that any ONU can quickly send an allocation request or service data to the OLT when service transmission is required.

The embodiment of the present application relates to a bandwidth allocation method, which is applied to an optical line terminal OLT, where the OLT is in communication connection with a plurality of optical network units ONU, and in this embodiment, ONU groups are in one-to-one correspondence with bandwidth channels, as shown in fig. 3, and specifically includes the following steps:

step 301, forming a group from a plurality of ONUs according to a preset grouping rule, and acquiring an ONU group.

Specifically, when the number of ONUs in communication connection with one OLT is too large, before configuring corresponding bandwidth channels for the ONUs, the ONUs not allocated with bandwidth may be grouped according to a preset grouping rule, the ONUs not allocated with bandwidth may be divided into different groups, and then the bandwidth channels may be configured in units of the groups, where the preset grouping rule may be classified according to traffic corresponding to each ONU, may be classified according to a traffic class corresponding to each ONU, or may be classified according to a priority corresponding to each ONU.

And 302, selecting a part of guaranteed bandwidth from the guaranteed bandwidth range corresponding to the ONU group as a bandwidth channel corresponding to the ONU group.

Specifically, the guaranteed bandwidth range corresponding to an ONU group is the sum of the guaranteed bandwidth ranges corresponding to all ONUs in the ONU group, and after the guaranteed bandwidth range corresponding to the ONU group is determined, a part of bandwidth is selected from the guaranteed bandwidth range corresponding to the ONU group as a bandwidth channel of the ONU group, at this time, the bandwidth channel and the ONU correspond to each other in a one-to-many manner, and a plurality of ONUs share one bandwidth channel, where the format of the bandwidth channel in this embodiment is as shown in table 2, when the field 9 takes the value of 2 to identify multicast, the T-CONT value corresponding to the fields 5 to 6 is allocated to a plurality of ONUs, that is, one T-CONT value corresponds to a plurality of ONUs, so as to achieve the purpose that the ONU group shares the bandwidth channel:

table 2 format of bandwidth channel when the correspondence between bandwidth channel and ONU is a pair

Step 303, receiving an allocation request and/or service data sent by the ONU through the bandwidth channel.

Step 304, determining whether the ONU identifier can be identified.

Specifically, this step is substantially the same as step 102 in the embodiment of the present invention, and is not repeated herein.

And step 305, allocating a corresponding bandwidth for the ONU corresponding to the ONU identification.

Specifically, this step is substantially the same as step 103 in the embodiment of the present invention, and is not repeated herein.

Step 306, allocating corresponding bandwidths for one or several optical network units ONU.

Specifically, this step is substantially the same as step 104 in the embodiment of the present invention, and is not described herein again.

In this embodiment, when the corresponding relationship between the bandwidth channel and the ONU is set to be one-to-many, bandwidth resource waste caused by setting a reserved bandwidth for each ONU is avoided, and the utilization rate of the bandwidth resource of the present application is improved.

The embodiment of the application relates to a bandwidth allocation method, which is applied to an optical line terminal OLT, wherein the OLT is in communication connection with a plurality of optical network units ONU, and as shown in figure 4, the method specifically comprises the following steps:

step 401, allocating a corresponding bandwidth channel to the ONU without bandwidth allocation, which may be implemented by step 201, or may be implemented by step 301 and step 302, which is not described herein again.

And 402, receiving an allocation request and/or service data sent by the ONU through the bandwidth channel.

Step 403, determining whether the ONU identifier can be identified.

And step 404, allocating a corresponding bandwidth to the ONU corresponding to the ONU identifier.

Specifically, this step is substantially the same as step 103 in the embodiment of the present invention, and details are not repeated here, but after allocating bandwidths to each ONU, when the ONU performs service transmission, step 406 may be executed.

Step 405, allocating corresponding bandwidth to one or several ONUs.

Specifically, this step is substantially the same as step 104 in the embodiment of the present invention, and details are not repeated here, but after allocating a bandwidth to each ONU, step 406 may be executed when the ONU performs service transmission.

And step 406, acquiring the use frequency of the bandwidth channel or the service flow of the ONU or the ONU group corresponding to the bandwidth channel.

Specifically, after allocating a bandwidth channel to each ONU, the OLT may acquire the use frequency of the bandwidth channel by counting the number of times that the ONU sends an allocation request and/or service data or the bandwidth occupation situation; or, when the ONU or the ONU corresponding to the bandwidth channel performs service transmission, the service traffic when the ONU or the ONU group performs service transmission may be acquired.

Step 407, adjust the corresponding range of the bandwidth channel according to the usage frequency or the traffic flow.

Specifically, when the usage frequency of the bandwidth channel is lower than the preset frequency threshold, it indicates that the usage frequency of the bandwidth channel is lower, and the bandwidth range of the bandwidth channel can be appropriately narrowed, and a part of the bandwidth range of the bandwidth channel is released to be used by other ONUs; or when the traffic flow of the ONU or the ONU group corresponding to the bandwidth channel is lower than the preset traffic threshold, it indicates that the bandwidth of the ONU or the ONU group is sufficient, and the bandwidth channel does not need to be adjusted, and when the traffic flow of the ONU or the ONU group corresponding to the bandwidth channel is higher than the preset threshold, it indicates that the transmission pressure of the bandwidth corresponding to the ONU or the ONU group is large, and the bandwidth range of the bandwidth channel can be appropriately narrowed, and the bandwidth range of a part of the bandwidth channel is released, so that the ONU or the ONU group can be used for transmitting the traffic.

It should be noted here that: step 405 and step 406 may be placed at any position after step 401, and may also be performed in steps 301 to 306 in the embodiment of the present application.

In this embodiment, when the guaranteed bandwidth is used as the bandwidth channel, the size of the bandwidth channel may be dynamically adjusted according to the usage frequency of the bandwidth channel and the traffic condition of the ONU or the ONU group corresponding to the reserved bandwidth, so as to avoid bandwidth resource waste caused by an excessively large bandwidth channel and improve the utilization rate of the bandwidth resource.

The embodiment of the application relates to a bandwidth allocation method, which is applied to an optical line terminal OLT, wherein the OLT is in communication connection with a plurality of optical network units ONU, in the embodiment, a time slot comprising a position and a size is designated for the ONU as a corresponding bandwidth channel, and the bandwidth channel is also used for transmitting services for other ONUs connected with the OLT. As shown in fig. 5, the method specifically includes the following steps:

step 501, a time slot including a position and a size is designated as a bandwidth channel corresponding to an ONU, wherein the bandwidth channel is also used for other ONUs to transmit services. In one example, a periodic bandwidth is selected as a bandwidth channel corresponding to an ONU, and the periodic bandwidth may be allocated once and then need not be allocated repeatedly. In other examples, an aperiodic bandwidth may also be selected as a bandwidth channel corresponding to the ONU, where the aperiodic bandwidth needs to be pre-allocated before each use.

Taking the specified bandwidth as the periodic bandwidth as an example, when a bandwidth channel is set for an ONU, a periodic bandwidth (for example, a certain timeslot in an uplink 125 μ s superframe is specified) may be specified in a bandwidth range corresponding to the ONU as the bandwidth channel of the ONU, where the ONU and the bandwidth channel are in a one-to-one relationship, and a periodic bandwidth (for example, a certain timeslot in an uplink 125 μ s superframe is specified) may also be specified as the bandwidth channels of all ONUs in an ONU group, where the corresponding relationship between the bandwidth channels and the ONUs is also a one-to-many relationship, but the bandwidth channel may be used for enabling the ONU to send an allocation request, and also enable other ONUs connected to the OLT to perform service transmission, where a format of the bandwidth channel in this embodiment is shown in table 3:

TABLE 3 Bandwidth channel Format when the Bandwidth channel is in a 125 μ s superframe period

Byte number	Content contained in bytes	Content description
			1-2	ONU-ID	Identification of optical network units
3	0x0A	Message type ID
			4	SeqNo	Sequence numbers for unicast PLOAM
5-6	StartTime	Position of bandwidth channel in 125 mu s superframe period
			7-8	Ind length	Length of bandwidth lanes in 125 mus superframe period
9	Ind pattern	The pattern of each byte in the bandwidth channel is a combination of 0 and 1
			10-40	Padding	Specifying a negotiation mode between an ONU and an OLT
41-48	MIC	Integrity checking of messages

And step 502, receiving service data transmitted by other ONUs through a bandwidth channel.

Step 503, performing forward error correction check on the service data transmitted by other ONUs in the bandwidth channel.

Step 504, if the forward error correction check is faulty, the service data sent by other ONUs is corrected. And if the error is related to the bandwidth channel, judging that the ONU corresponding to the bandwidth channel sends an allocation request.

In an example, when other ONUs in the bandwidth channel transmit service data, if no data needs to be transmitted by the ONU corresponding to the bandwidth channel, the allocation request is not transmitted in the bandwidth channel, and the result of performing forward error correction check on the transmitted service data by the OLT is that the check is successful, so that it can be known that the bandwidth channel does not include the bandwidth allocation request transmitted by the ONU. If the ONU corresponding to the bandwidth channel needs to recover the transmission of the service data and the allocation request is sent in the bandwidth channel, the service data sent in the bandwidth channel is interfered due to being simultaneously sent to the allocation request, and further, when the OLT performs forward error correction check on the transmitted service data, the result is that an error is checked, and the allocation request is sent in a certain time slot in the uplink 125 μ s superframe, so that the position of the interference is determined, and the OLT can determine that the error is related to the bandwidth channel and determine that the ONU corresponding to the bandwidth channel sends the allocation request.

Step 505, determining whether the ONU identifier is identified.

Step 506, allocating a corresponding bandwidth to the ONU corresponding to the ONU identifier.

Specifically, this step is substantially the same as step 103 in the embodiment of the present invention, and is not described herein again.

Step 507, allocating corresponding bandwidth for one or several optical network units ONU.

In this embodiment, the bandwidth channel may be used for receiving an allocation request, and may also be used for the ONU to transmit a service, so as to improve the utilization rate of the bandwidth resource. In addition, forward error correction may be performed on the signals transmitted within the bandwidth channel to reduce interference experienced during signal transmission and to confirm whether there is transmission of an allocation request.

The embodiment of the application relates to a bandwidth allocation method, which is applied to an optical line terminal OLT, wherein the OLT is in communication connection with a plurality of optical network units ONU, and as shown in FIG. 6, the method specifically comprises the following steps:

step 601, receiving an allocation request and/or service data sent by an ONU through a preset bandwidth channel.

Specifically, this step is substantially the same as step 101 in the embodiment of the present invention, and is not repeated herein.

Step 602, determine whether the ONU identifier can be identified.

Step 603, calculating the bandwidth size required by the ONU, and obtaining the guaranteed bandwidth range of the ONU corresponding to the ONU identifier according to the ONU identifier.

Specifically, if the ONU identifier can be identified, the bandwidth size required by the ONU needs to be calculated according to the allocation request and/or the service data, and the guaranteed bandwidth range of the ONU corresponding to the ONU identifier is obtained.

At step 604, it is determined whether the guaranteed bandwidth range is greater than or equal to the required bandwidth size.

Specifically, after the guaranteed bandwidth range of the ONU to be allocated is acquired, it needs to be compared with the size of the required bandwidth, if the guaranteed bandwidth range is greater than or equal to the size of the required bandwidth, step 605 is executed, and if the guaranteed bandwidth range is smaller than the size of the required bandwidth, step 606 is executed.

And 605, selecting a part of guaranteed bandwidth from the guaranteed bandwidth range to allocate to the ONU corresponding to the ONU identifier.

Specifically, when the guaranteed bandwidth range is greater than or equal to the required bandwidth size, it indicates that the guaranteed bandwidth range corresponding to the ONU itself is sufficient for bandwidth allocation, and the required bandwidth size is directly selected from the guaranteed bandwidth range corresponding to the ONU itself to the ONU.

And 606, distributing all the guaranteed bandwidths in the guaranteed bandwidth range to the ONU corresponding to the ONU identifier, and selecting part of bandwidths from the bandwidth ranges corresponding to other ONUs in the plurality of ONU to distribute to the ONU corresponding to the ONU identifier.

Specifically, when the guaranteed bandwidth range is smaller than the required bandwidth size, it indicates that the guaranteed bandwidth range corresponding to the ONU itself is insufficient for bandwidth allocation, and it is necessary to allocate all bandwidths in the guaranteed range corresponding to the ONU itself to the ONU first, and schedule part of the bandwidths to the ONU from idle bandwidths of other ONUs.

Step 607, allocating corresponding bandwidth to one or several optical network units ONU.

In this embodiment, on the basis of other embodiments, when allocating bandwidth to an ONU, the bandwidth may be determined by combining the size of the required allocated bandwidth and the size of the guaranteed bandwidth of the ONU, and when the required allocated bandwidth is small, the bandwidth may be obtained from the guaranteed bandwidth of the ONU; when the required bandwidth is large, the bandwidth of other ONUs needs to be allocated to the ONU, and the allocation strategy can be flexibly adjusted according to the self condition of the ONU and the required bandwidth size, so as to improve the utilization rate of bandwidth resources.

The embodiment of the application also relates to a bandwidth allocation method, which is applied to an Optical Network Unit (ONU), and the specific flow is shown in FIG. 7.

Step 701, detecting whether the bandwidth required by the service traffic of the ONU is greater than the bandwidth allocated to the ONU by the OLT. If the required bandwidth is greater than the bandwidth allocated to the ONU by the OLT, step 702 is performed, and if the required bandwidth is not greater than the bandwidth allocated to the ONU by the OLT, step 701 is performed.

In one example, the ONU is an ONU that is not currently allocated with bandwidth, that is, the OLT allocates 0 bandwidth to the ONU. If the ONU has service data to send, since the allocated bandwidth is 0, the bandwidth required by the service traffic of the ONU is inevitably greater than the bandwidth allocated to the ONU by the OLT, step 702 is triggered, and if the ONU does not have service data to send, the bandwidth required by the service traffic of the ONU is not greater than the bandwidth allocated to the ONU by the OLT at this time, and the process continues to step 701. That is, when the ONU does not transmit data, it does not transmit data in the preset bandwidth channel, and does not transmit an allocation request; when the ONU has data transmission, if the preset bandwidth can transmit the data, the ONU transmits the data and transmits an allocation request according to the requirement; and if the ONU has data transmission but the corresponding bandwidth channel is used for other ONUs to transmit service data or the corresponding bandwidth channel is not enough to transmit the service data, indicating the OLT to allocate the guaranteed bandwidth by transmitting an allocation request.

In step 702, an allocation request and/or service data are sent to the OLT through a preset bandwidth channel, so that the OLT allocates a corresponding bandwidth to the ONU according to the allocation request and/or the service data.

In one example, a bandwidth channel may be pre-allocated to an ONU through a management channel such as a network management unit, an OMCI, a PLOAM, and a BWmap, and the correspondence between the ONU and the bandwidth channel may be a one-to-one relationship or a one-to-many relationship. When the ONU detects that the bandwidth required by the service traffic to be sent is greater than the bandwidth allocated to the ONU by the OLT, an allocation request may be sent to the OLT through the pre-allocated bandwidth channel, where the allocation request may carry the size of the allocated bandwidth, that is, the ONU notifies the OLT of the size of the bandwidth required by the ONU through a bandwidth signaling. In another example, when there is transmission service recovery, the ONU may directly send service data through the preset bandwidth channel, that is, there is burst traffic in the preset bandwidth channel, and the OLT needs to calculate the bandwidth size required by the ONU according to the burst traffic after receiving the service data.

In step 703, the ONU transmits the traffic data in the corresponding bandwidth allocated by the OLT.

In an example, after step 703, step 704 may be further included, where if the bandwidth required by the service traffic of the ONU is less than the corresponding bandwidth, an idle frame is transmitted in the preset bandwidth channel, and the OLT is instructed to adjust the bandwidth corresponding to the ONU. If all the service data received through the preset bandwidth channel are idle frames, it indicates that the bandwidth allocated to the corresponding ONU is too large, and the bandwidth allocated to the corresponding ONU can be reduced, so as to improve the bandwidth utilization rate.

The method and the device can improve the efficiency of bandwidth allocation of the ONU, reduce the time delay of ONU service transmission, and solve the technical problem that the bandwidth allocation in the prior art cannot allocate the bandwidth to the ONU again after a certain scheduling period, so that the ONU cannot transmit the service in the scheduling period, and further generate larger time delay during service transmission.

The embodiment of the present application further relates to an OLT, where the OLT is communicatively connected to a plurality of ONUs, as shown in fig. 8, and the OLT includes:

a receiving module 801, configured to receive, through a preset bandwidth channel, an allocation request and/or service data sent by an ONU.

An allocating module 802, configured to allocate, according to the allocation request and/or the service data, a corresponding bandwidth to an ONU corresponding to the ONU identifier if the ONU identifier can be identified; and if the ONU identification cannot be identified, distributing corresponding bandwidth to the one or the plurality of ONUs according to the preset bandwidth channel.

It should be understood that the present embodiment is an apparatus embodiment corresponding to the method embodiment of the method applied to the OLT, and the present embodiment may be implemented in cooperation with the method embodiment. The details and technical effects of the related technologies mentioned in the above method embodiments are still valid in this embodiment, and accordingly, the related technologies mentioned in this embodiment can also be applied in the above method embodiments.

An embodiment of the present application further relates to an ONU, as shown in fig. 9, including:

a detecting module 901, configured to detect whether a bandwidth required by a service flow of an ONU is greater than a bandwidth allocated to the ONU by an optical line terminal OLT;

a sending module 902, configured to send, after the detection module detects that a bandwidth required by service traffic of the ONU is greater than a bandwidth allocated to the ONU by an OLT, an allocation request and/or service data to the OLT through a preset bandwidth channel, so that the OLT allocates a corresponding bandwidth to the ONU according to the allocation request and/or the service data;

in one example, the ONU further comprises a transmission module for transmitting traffic data in the corresponding bandwidth allocated by the OLT.

It should be understood that this embodiment is an apparatus embodiment corresponding to the method embodiment in which the above method is applied to the ONU, and this embodiment may be implemented in cooperation with the above method embodiment. The details and technical effects of the related technologies mentioned in the method embodiments are still valid in this embodiment, and accordingly, the related technologies mentioned in this embodiment may also be applied in the method embodiments.

An embodiment of the present application relates to a terminal, as shown in fig. 10, including:

at least one processor 1001; and memory 1002 communicatively coupled to the at least one processor 1001; the memory 1002 stores instructions executable by the at least one processor 1001, and the instructions are executed by the at least one processor 1001 to enable the at least one processor 1001 to perform the bandwidth allocation method described in any one of the method embodiments.

In the embodiments of the present application, the memory and the processor are connected by a bus, which may include any number of interconnected buses and bridges, the buses connecting various circuits of the memory and the one or more processors together. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The service data processed by the processor is transmitted on a wireless medium through the antenna, and further, the antenna receives the service data and transmits the service data to the processor.

The processor is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory may be used to store business data used by the processor in performing operations.

The embodiment of the application relates to a computer readable storage medium which stores a computer program. The computer program realizes the above-described method embodiments when executed by a processor.

That is, as can be understood by those skilled in the art, all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the present application, and that various changes in form and details may be made therein without departing from the spirit and scope of the present application in practice.

Claims

1. A bandwidth allocation method is applied to an Optical Line Terminal (OLT), wherein the OLT is in communication connection with a plurality of Optical Network Units (ONUs), and the method comprises the following steps:

receiving an allocation request and/or service data sent by the ONU through a preset bandwidth channel;

if the ONU identification can be identified, allocating a corresponding bandwidth for the ONU corresponding to the ONU identification according to the allocation request and/or the service data;

and if the ONU identification cannot be identified, distributing corresponding bandwidth for the one or the plurality of optical network units ONU according to the preset bandwidth channel.

2. The method according to claim 1, wherein before receiving the allocation request and/or the service data sent by the ONU through a preset bandwidth channel, the method further comprises:

selecting a part of guaranteed bandwidth from a guaranteed bandwidth range corresponding to the ONU as the bandwidth channel corresponding to the ONU;

alternatively, the first and second electrodes may be,

forming a group from a plurality of ONUs according to a preset group rule, and acquiring an ONU group;

and selecting part of guaranteed bandwidth from the guaranteed bandwidth range corresponding to the ONU group as the bandwidth channel corresponding to the ONU group.

3. The method according to claim 1, wherein before receiving the allocation request and/or the service data sent by the ONU through a preset bandwidth channel, the method further comprises:

and assigning a time slot comprising a position and a size as the corresponding bandwidth channel for the ONU, wherein the bandwidth channel is also used for transmitting service data for other ONUs connected with the OLT.

4. The method according to claim 3, wherein the receiving, through a preset bandwidth channel, the allocation request and/or the service data sent by the ONU comprises:

checking the service data transmitted by the other ONUs;

and if the verification is wrong, correcting the error of the service data sent by other ONUs, and if the error is related to the bandwidth channel, judging that the ONU corresponding to the bandwidth channel sends the allocation request.

5. The method according to any one of claims 1 to 4, wherein if an ONU identifier can be identified, allocating a corresponding bandwidth to the ONU corresponding to the ONU identifier according to the allocation request and/or the service data comprises:

calculating the bandwidth size required by the ONU according to the allocation request and/or the service data;

acquiring the guaranteed bandwidth range of the ONU corresponding to the ONU identification according to the ONU identification;

if the guaranteed bandwidth range is larger than or equal to the required bandwidth, selecting a part of guaranteed bandwidth from the guaranteed bandwidth range to distribute to the ONU corresponding to the ONU identification;

if the guaranteed bandwidth range is smaller than the required bandwidth, distributing all guaranteed bandwidths in the guaranteed bandwidth range to the ONU corresponding to the ONU identification, and selecting partial bandwidths from the bandwidth ranges corresponding to other ONUs in the plurality of ONU to distribute to the ONU corresponding to the ONU identification.

6. The method according to any one of claims 1 to 4, wherein if the ONU identifier cannot be identified, allocating a corresponding bandwidth to the one or several ONU according to the preset bandwidth channel comprises:

and allocating the bandwidth with the guaranteed bandwidth size to the ONU related to the preset bandwidth channel.

7. The method according to any one of claims 1 to 4, wherein after allocating the corresponding bandwidth to the one or several optical network units ONU according to the preset bandwidth channel, the method further includes:

receiving bandwidth state information and service flow information returned by the plurality of optical network units ONU;

and adjusting the bandwidth range corresponding to the plurality of optical network units ONU according to the bandwidth state information and the service flow information.

8. The method according to any one of claims 1 to 4, wherein before receiving the allocation request and/or the traffic data sent by the ONU through a preset bandwidth channel, the method further comprises:

sending the bandwidth range corresponding to the bandwidth channel to the ONU;

and if the channel response message returned by the ONU through the bandwidth channel is not received, continuously sending the bandwidth range corresponding to the bandwidth channel to the ONU.

9. A bandwidth allocation method applied to an Optical Network Unit (ONU), the method comprising:

and if the bandwidth required by the service flow of the ONU is greater than the bandwidth allocated to the ONU by an optical line terminal OLT, transmitting an allocation request and/or service data to the OLT through a preset bandwidth channel.

10. The method of claim 9, wherein after the sending an allocation request and/or service data to the OLT through a preset bandwidth channel, the method further comprises:

and if the bandwidth required by the service flow of the ONU is smaller than the corresponding bandwidth, transmitting an idle frame in the preset bandwidth channel.

11. An OLT, wherein the OLT is communicatively coupled to a plurality of optical network units, ONUs, comprising:

the receiving module is used for receiving the allocation request and/or the service data sent by the ONU through a preset bandwidth channel;

the distribution module is used for distributing corresponding bandwidth to the ONU corresponding to the ONU identification according to the distribution request and/or the service data if the ONU identification can be identified; and if the ONU identification cannot be identified, distributing corresponding bandwidth for the one or the plurality of optical network units ONU according to the preset bandwidth channel.

12. An ONU, comprising:

a detection module, configured to detect whether a bandwidth required by a service traffic of the ONU is greater than a bandwidth allocated to the ONU by an optical line terminal OLT;

and the sending module is used for sending an allocation request and/or service data to the OLT through a preset bandwidth channel after the detection module detects that the bandwidth required by the service flow of the ONU is greater than the bandwidth allocated to the ONU by the OLT.

13. A terminal, comprising: at least one processor; and (c) a second step of,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the bandwidth allocation method of any one of claims 1 to 8 or to perform the bandwidth allocation method of claim 9 or 10.

14. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the bandwidth allocation method of any one of claims 1 to 8, or implements the bandwidth allocation method of claim 9 or 10.