CN109218855B - Bandwidth allocation method and device for OLT (optical line terminal) slices and optical network system - Google Patents

Bandwidth allocation method and device for OLT (optical line terminal) slices and optical network system Download PDF

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CN109218855B
CN109218855B CN201710518734.2A CN201710518734A CN109218855B CN 109218855 B CN109218855 B CN 109218855B CN 201710518734 A CN201710518734 A CN 201710518734A CN 109218855 B CN109218855 B CN 109218855B
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bandwidth
uplink
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upstream
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CN109218855A (en
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张德智
蒋铭
沈成彬
金嘉亮
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China Telecom Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/78—Architectures of resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/80—Actions related to the user profile or the type of traffic
    • H04L47/805—QOS or priority aware
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation

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Abstract

The invention discloses a bandwidth allocation device for an OLT slice and an optical network system, wherein the method comprises the following steps: acquiring the total quantity of slice uplink real-time competition bandwidth requirements corresponding to each slice under a Passive Optical Network (PON) port of an OLT; acquiring total uplink competitive bandwidth resources of the slices, allocating the total uplink competitive bandwidth resources of the slices to the slices according to a preset allocation rule, and acquiring the uplink competitive bandwidth resources of the slices corresponding to the slices; and allocating the upstream competitive bandwidth to the optical network unit ONU belonging to the slice based on the slice upstream competitive bandwidth resource corresponding to the slice and the total amount of the slice upstream real-time competitive bandwidth requirements. The method, the device and the system can perform fair bandwidth division on different slices in OLT slices based on ONU granularity, effectively improve the bandwidth utilization rate of a network system and have the feasibility of current network deployment and application.

Description

Bandwidth allocation method and device for OLT (optical line terminal) slices and optical network system
Technical Field
The present invention relates to the field of optical network technologies, and in particular, to a bandwidth allocation method and apparatus for an OLT slice, and an optical network system.
Background
At present, Passive Optical Network (Passive Optical Network, PON) has been widely deployed. In the process of deploying applications, an OLT (Optical Line Terminal) has a need for OLT fragmentation to carry multiple services with different requirements. The traditional OLT equipment cannot realize full-service access, the occurrence of a network slicing technology can realize service isolation, and data transmitted by the OLT is sliced, so that the resource utilization efficiency can be improved. In the prior art, the granularity of the slice of the OLT is usually the granularity of the PON ports of the OLT, that is, the slice is allocated according to the number of the PON ports of the OLT.
The existing PON port bandwidth allocation method is generally as follows: setting a bandwidth template for each ONU (Optical Network Unit) to ensure a bandwidth CIR + a peak bandwidth PIR. And aiming at the online ONU, preferentially allocating bandwidth for the uplink bandwidth application of the ONU within the CIR threshold range in the uplink bandwidth capacity of the PON port, and competing and acquiring by all the ONUs together aiming at the exceeded uplink bandwidth application, wherein the acquired bandwidth cannot exceed a correspondingly set PIR value. CIRs of all ONUs connected to a PON port of the same OLT are added to be not more than the effective uplink bandwidth sum B. If the bandwidth requirement of ONU at a certain moment is less than CIR, the ONU can obtain the effective bandwidth authorization of OLT full amount, and the part of CIR greater than CIR and less than PIR(PIR-CIR), then it needs to compete with other ONUs together, and the resource pool available for contention is (B- Σ CIR)n) The OLT is typically partitioned in columns according to real-time requirements.
When the slices are divided based on the ONU granularity, the ONUs of the same PON port belong to different OLT slices, if the existing uplink bandwidth allocation rule is used, due to the common attribute of the contention resource pool, the total real-time contention bandwidth requirement amount of the corresponding ONUs belonging to the same OLT slice cannot be completely met when the total real-time contention bandwidth requirement amount is lower than the contention bandwidth capacity corresponding to the allocation proportion of the (CIR, PIR) pre-configured bandwidth template.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a bandwidth allocation for an OLT slice, an apparatus and an optical network system.
According to an aspect of the present invention, there is provided a bandwidth allocation method for an Optical Line Terminal (OLT) slice, comprising: acquiring the total quantity of slice uplink real-time competition bandwidth requirements corresponding to each slice under a Passive Optical Network (PON) port of an OLT; acquiring total resource of uplink competitive bandwidth of slices, and allocating the total resource of the uplink competitive bandwidth of the slices to the slices according to a preset allocation rule to acquire the uplink competitive bandwidth resource of the slices corresponding to the slices; and allocating the upstream competitive bandwidth to the optical network unit ONU belonging to the slice based on the slice upstream competitive bandwidth resource corresponding to the slice and the total amount of the slice upstream real-time competitive bandwidth requirements.
Optionally, the allocating the upstream contention bandwidth of the slice to the ONU belonging to the slice based on the upstream contention bandwidth resource of the slice corresponding to the slice and the total amount of the upstream real-time contention bandwidth requirement of the slice includes: and if the uplink competitive bandwidth resource of the slice corresponding to the first slice is determined to be larger than or equal to the total amount of the uplink real-time competitive bandwidth requirement of the slice corresponding to the first slice, allocating the uplink competitive bandwidth according to the real-time competitive bandwidth requirement of the first ONU belonging to the first slice in the uplink competitive bandwidth resource of the slice corresponding to the first slice.
Optionally, removing the total amount of the upstream competitive bandwidth allocated to the first ONU belonging to the first slice from the upstream competitive bandwidth resource of the slice corresponding to the first slice, and obtaining a remaining upstream competitive bandwidth resource; summarizing the residual uplink competitive bandwidth resources and the slice uplink competitive bandwidth resources corresponding to the second slice to form new uplink competitive bandwidth resources; the slice uplink competitive bandwidth resource corresponding to the second slice is less than the total amount of the slice uplink real-time competitive bandwidth requirement corresponding to the second slice; allocating a slice uplink contendable bandwidth resource for the second slice within the new uplink contendable bandwidth resource.
Optionally, the allocating the slice uplink contendable bandwidth resource for the second slice within the new uplink contendable bandwidth resource includes: and allocating the uplink competitive bandwidth resources for the second slice in the new uplink competitive bandwidth resources according to the proportional relation of the total uplink real-time competitive bandwidth demands of the second slice.
Optionally, the allocating the slice uplink contendable bandwidth resource for the second slice within the new uplink contendable bandwidth resource includes: and acquiring real-time competition bandwidth requirements of second ONUs belonging to all the second slices, and allocating uplink competition bandwidth to the second ONUs in the new uplink competitive bandwidth resource according to a preset bandwidth competition rule.
Optionally, the obtaining of the total resource of the slice uplink contention bandwidth includes: acquiring the sum of uplink guaranteed bandwidths of ONU belonging to each slice under a PON port of an OLT; and removing the sum of the uplink guaranteed bandwidths from the total amount of the available uplink bandwidths to obtain the total resource of the slice uplink competitive bandwidth.
According to another aspect of the present invention, there is provided a bandwidth allocation apparatus for an optical line terminal OLT slice, comprising: the ONU bandwidth demand acquisition module is used for acquiring the total amount of slice uplink real-time competition bandwidth demands corresponding to each slice under the PON port of the OLT; the slice bandwidth demand allocation module is used for acquiring the total uplink competitive bandwidth resources of the slices, allocating the total uplink competitive bandwidth resources of the slices to the slices according to a preset allocation rule and acquiring the uplink competitive bandwidth resources of the slices corresponding to the slices; and the uplink competitive bandwidth allocation module is used for allocating uplink competitive bandwidth to the optical network units ONU belonging to the slice based on the slice uplink competitive bandwidth resource corresponding to the slice and the total amount of the slice uplink real-time competitive bandwidth requirements.
Optionally, the contention based uplink bandwidth allocating module includes: a first allocation unit, configured to allocate, within a slice upstream contendable bandwidth resource corresponding to a first slice, an upstream contendable bandwidth according to a real-time contention bandwidth requirement of a first ONU belonging to the first slice, if it is determined that the slice upstream contendable bandwidth resource corresponding to the first slice is greater than or equal to a total amount of the slice upstream real-time contention bandwidth requirements corresponding to the first slice.
Optionally, the first allocating unit is configured to remove, from the uplink competitive bandwidth resources of the slice corresponding to the first slice, a total amount of uplink competitive bandwidth allocated to the first ONU belonging to the first slice, and obtain a remaining uplink competitive bandwidth resource; the uplink contention bandwidth allocation module further includes: the second allocating unit is configured to aggregate the remaining uplink competitive bandwidth resources and the slice uplink competitive bandwidth resources corresponding to the second slice to form new uplink competitive bandwidth resources; and allocating a slice uplink competitive bandwidth resource to the second slice in the new uplink competitive bandwidth resource, wherein the slice uplink competitive bandwidth resource corresponding to the second slice is smaller than the total slice uplink real-time competitive bandwidth requirement corresponding to the second slice.
Optionally, the second allocating unit is further configured to allocate, according to a proportional relationship of a total amount of real-time contention bandwidth demands for uplink transmission of the slice of the second slice, the uplink contention bandwidth resource to the second slice within the new uplink contention-based bandwidth resource.
Optionally, the second allocating unit is further configured to acquire real-time contention bandwidth requirements of second ONUs belonging to all the second slices, and allocate an uplink contention bandwidth to the second ONUs within the new uplink contention-capable bandwidth resource according to a preset bandwidth contention rule.
Optionally, the ONU bandwidth requirement obtaining module is further configured to obtain a sum of uplink guaranteed bandwidths of ONUs belonging to each slice under a PON port of the OLT; the slice bandwidth demand allocation module is further configured to remove the total uplink guaranteed bandwidth from the total amount of available uplink bandwidth, and obtain the total slice uplink contention bandwidth resource.
According to another aspect of the present invention, there is provided a bandwidth allocation apparatus for an optical line terminal OLT slice, comprising: a memory; and a processor coupled to the memory, the processor configured to perform a bandwidth allocation method for an optical line termination, OLT, slice as described above based on instructions stored in the memory.
According to a further aspect of the present invention, there is provided an optical line termination OLT comprising a bandwidth allocation arrangement as described above for a slice of the optical line termination OLT.
According to a further aspect of the present invention, there is provided an optical network system comprising an optical line termination, OLT, as described above.
According to the bandwidth allocation method and device for the OLT slice and the optical network system, the uplink competitive bandwidth is allocated to the ONU belonging to the slice by calculating and based on the slice uplink competitive bandwidth resource corresponding to the slice and the total quantity of the slice uplink real-time competitive bandwidth requirements, so that fair bandwidth division can be performed on different slices in the OLT slice based on the ONU granularity, and the bandwidth utilization rate of the network system is effectively improved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of one embodiment of a bandwidth allocation method for an OLT slice according to the present invention;
fig. 2 is a diagram illustrating an OLT acquiring a bandwidth request sent by an ONU in an uplink direction according to an embodiment of the bandwidth allocation method for an OLT slice in the present invention;
fig. 3 is a block diagram of an embodiment of a bandwidth allocation apparatus for an OLT slice according to the present invention;
fig. 4 is a block diagram of an upstream contention bandwidth allocation module in an embodiment of a bandwidth allocation apparatus for OLT slicing according to the present invention;
fig. 5 is a block diagram of another embodiment of a bandwidth allocation apparatus for an OLT slice according to the present invention.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first", "second", and the like are used hereinafter only for descriptive distinction and not for other specific meanings.
Fig. 1 is a flowchart of an embodiment of a bandwidth allocation method for an OLT slice according to the present invention, as shown in fig. 1:
step 101, acquiring a total amount of slice uplink real-time competition bandwidth requirements corresponding to each slice under a Passive Optical Network (PON) port of an OLT.
And 102, acquiring the total uplink competitive bandwidth resources of the slices, allocating the total uplink competitive bandwidth resources of the slices to the slices according to a preset allocation rule, and acquiring the uplink competitive bandwidth resources of the slices corresponding to the slices. The allocation rule may be various, such as the bandwidth allocation proportion in the bandwidth template.
There may be multiple ways to obtain the slice uplink contention bandwidth total resource, for example, obtain the uplink guaranteed bandwidth sum of the ONUs belonging to each slice under the PON port of the OLT, and remove the uplink guaranteed bandwidth sum from the available uplink bandwidth sum to obtain the slice uplink contention bandwidth total resource.
And 103, allocating the upstream competitive bandwidth to the optical network units ONU belonging to the slices based on the slice upstream competitive bandwidth resources corresponding to the slices and the total amount of the slice upstream real-time competitive bandwidth requirements. The uplink competitive bandwidth allocated to the ONU in the invention refers to the bandwidth exceeding the CIR part of the guaranteed bandwidth in the ONU application bandwidth.
The bandwidth allocation method for the OLT slice in the embodiment provides a dynamic bandwidth allocation method applied to the OLT slice in the passive optical network, and can perform fair bandwidth division for different slices in the OLT slice based on the ONU granularity.
In an embodiment, if it is determined that the slice upstream contendable bandwidth resource corresponding to the first slice is greater than or equal to the total amount of the slice upstream real-time contendable bandwidth requirements corresponding to the first slice, the upstream contendable bandwidth is allocated according to the real-time contendable bandwidth requirements of the first ONU belonging to the first slice within the slice upstream contendable bandwidth resource corresponding to the first slice.
And removing the total amount of the uplink competitive bandwidth allocated to the first ONU belonging to the first slice from the uplink competitive bandwidth resources corresponding to the first slice, so as to obtain the residual uplink competitive bandwidth resources. And summarizing the residual uplink competitive bandwidth resources and the slice uplink competitive bandwidth resources corresponding to the second slice to form new uplink competitive bandwidth resources. Allocating the slice uplink contendable bandwidth resource for the second slice within the new uplink contendable bandwidth resource.
There may be a variety of ways to allocate the slice uplink contendable bandwidth resource for the second slice within the new uplink contendable bandwidth resource. For example, according to the proportional relation of the total amount of the uplink real-time competitive bandwidth demands of the second slice, the uplink competitive bandwidth resources are allocated to the second slice in the new uplink competitive bandwidth resources. In the second slice, the second ONU may perform bandwidth contention according to a preset bandwidth contention rule.
Or, acquiring real-time competitive bandwidth requirements of second ONUs belonging to all second slices, and allocating uplink competitive bandwidth for the second ONUs in all second slices in the new uplink competitive bandwidth resource according to a preset bandwidth competition rule, that is, performing bandwidth competition for the second ONUs in all second slices in the new uplink competitive bandwidth resource.
In the above embodiment, when the slices are divided based on the ONU granularity, after the bandwidth allocation mechanism of the PON port of the OLT allocates the guaranteed bandwidth, the total amount of the real-time bandwidth contention requirement of the slice uplink and the total bandwidth contention resource (B- Σ CIR) of the slice uplink which is divided according to the ratio (bandwidth template value) are allocatedn) And comparing the uplink competitive bandwidth resources of the slice to be allocated to the slice, and adjusting the bandwidth allocation method according to the comparison result.
In one embodiment, if the condition a is satisfied that the total amount of slice upstream real-time contention bandwidth requirements > the slice upstream contendable bandwidth resources, the ONUs to which the slice belongs participate in the collective contention. If the condition B is met, the ONU to which the slice belongs does not participate in collective competition, the bandwidth is allocated according to the real-time bandwidth requirement, and the allocated residual bandwidth resources (the total amount of the slice uplink competitive bandwidth resources-the slice uplink real-time competitive bandwidth requirements) are summarized to form a new competitive resource pool to be allocated to the corresponding ONU to which all slices meeting the condition A belong.
In one embodiment, 64 ONUs exist in a PON port of a GPON of an OLT, the four slices belong to four divided slices, namely slice 1, slice 2, slice 3 and slice 4, and some ONUs are not online in the ONUs to which the slices belong. The PON upstream total bandwidth is 1250M, which is referred to as bandwidth in the following.
The OLT acquires a bandwidth request sent by the ONU in the upstream direction as shown in fig. 2. The OLT calculates the CIR sum of its affiliated ONUs and the total amount of slice real-time competitive bandwidth requirements for each slice according to the correspondence table between the ONUs and the slices, as shown in table 1 below:
slice numbering Uplink guaranteed bandwidth summation Total amount of uplink real-time contention bandwidth requirement
Section
1 132.33 239.49
Section 2 180.63 455.54
Section 3 78.25 91.92
Section 4 155.64 227.49
TABLE 1 CIR Total, slice real-time competitive bandwidth requirement Total Table of ONU
Collecting the CIR sum of each slice, and removing the CIR sum from the total amount of the available uplink bandwidth to obtain the total resource of the uplink competitive bandwidth of the slice: the total resource of the uplink contention bandwidth is 703.16. Slice uplink competitive bandwidth resources which should be allocated to each slice after calculating slice uplink competitive bandwidth total resources divided according to a proportion (bandwidth template value) are shown in the following table 2;
slice numbering Slice uplink competitive bandwidth resources Whether or not to participate in inter-slice competition
Section
1 153.25 Is that
Section 2 207.34 Is that
Section 3 108.18 Whether or not
Section 4 234.39 Whether or not
Table 2-slice uplink contendable bandwidth resource table for each slice
And comparing the total quantity of the real-time competitive bandwidth demands of the slice uplinks of the slices 1-4 with the competitive bandwidth resources of the slice uplinks, and determining that the slices 3 and 4 do not need to participate in competition. Therefore, for the ONUs belonging to slices 3 and 4, the bandwidths allocated to the ONUs belonging to the slices in the upstream competitive bandwidth resources of the corresponding slices according to the respective ratios of the applications of the ONUs belonging to the slices are as shown in table 3 below:
Figure BDA0001337171550000081
Figure BDA0001337171550000091
Figure BDA0001337171550000101
table 3-table of bandwidths allocated to ONUs to which slices 3 and 4 belong
The sum of the allocated bandwidths for cumulative slice 3 and slice 4 is shown in table 4 below:
Figure BDA0001337171550000102
Figure BDA0001337171550000111
table 4-statistics of slice 3 and slice 4 allocated bandwidths
And removing the total amount of the uplink competitive bandwidth allocated to the ONUs belonging to the slices 3 and 4 from the uplink competitive bandwidth resources of the slices corresponding to the slices 3 and 4 to obtain the residual uplink competitive bandwidth resources. The OLT allocates bandwidth resources to the ONUs of the slice that does not satisfy the condition in the previous module according to the bandwidth application ratio based on the remaining upstream contention bandwidth resources as shown in table 5 below.
Figure BDA0001337171550000112
Figure BDA0001337171550000121
Figure BDA0001337171550000131
Table 5-table of bandwidths allocated to ONUs to which slices 1 and 2 belong
In the method for slicing the OLT in the optical line terminal in the embodiment, the upstream competitive bandwidth is allocated to the ONU belonging to the slice by calculating and based on the total amount of the upstream competitive bandwidth resources of the slice and the real-time competitive bandwidth requirements of the upstream competitive bandwidth of the slice corresponding to the slice, so that fair bandwidth division can be performed for different slices in the OLT slice based on the granularity of the ONU, and the bandwidth utilization rate of the network system is effectively improved.
In one embodiment, as shown in fig. 3, the present invention provides a bandwidth allocation apparatus 30 for an optical line termination OLT slice, including: an ONU bandwidth requirement acquisition module 31, a slice bandwidth requirement allocation module 32, and an upstream contention bandwidth allocation module 33.
The ONU bandwidth requirement obtaining module 31 obtains the total amount of upstream real-time competitive bandwidth requirements of the slices corresponding to the respective slices under the passive optical network PON port of the OLT. The slice bandwidth demand allocation module 32 obtains the total uplink bandwidth contention resources of the slices, allocates the total uplink bandwidth contention resources of the slices to the slices according to a preset allocation rule, and obtains the uplink contention-capable bandwidth resources of the slices corresponding to the slices.
The ONU bandwidth requirement obtaining module 31 obtains the sum of the upstream guaranteed bandwidths of the ONUs belonging to each slice under the PON port of the OLT. The slice bandwidth requirement allocation module 32 removes the total uplink guaranteed bandwidth from the total available uplink bandwidth to obtain the total slice uplink contention bandwidth resource. The upstream contention bandwidth allocation module 33 allocates upstream contention bandwidths to the optical network units ONU belonging to the slice based on the slice upstream contendable bandwidth resources corresponding to the slice and the total amount of the slice upstream real-time contention bandwidth requirements.
As shown in fig. 4, the contention based uplink bandwidth allocating module 32 includes: a first distribution unit 321 and a second distribution unit 322. If the first allocating unit 321 determines that the slice upstream contendable bandwidth resource corresponding to the first slice is greater than or equal to the total slice upstream real-time contendable bandwidth requirement amount corresponding to the first slice, the upstream contendable bandwidth is allocated according to the real-time contendable bandwidth requirement of the first ONU belonging to the first slice in the slice upstream contendable bandwidth resource corresponding to the first slice.
The first allocating unit 321 removes the total amount of the upstream competitive bandwidth allocated to the first ONU belonging to the first slice from the upstream competitive bandwidth resource of the slice corresponding to the first slice, and obtains the remaining upstream competitive bandwidth resource. The second allocating unit 322 summarizes the remaining uplink competitive bandwidth resources and the slice uplink competitive bandwidth resources corresponding to the second slice to form new uplink competitive bandwidth resources, and allocates the slice uplink competitive bandwidth resources to the second slice in the new uplink competitive bandwidth resources, where the slice uplink competitive bandwidth resources corresponding to the second slice are less than the total amount of the slice uplink real-time competitive bandwidth requirements corresponding to the second slice.
The second allocating unit 322 allocates the contention bandwidth resource for the second slice within the contention bandwidth resource for the new uplink according to the proportional relationship of the total amount of the contention bandwidth demand for the slice uplink of the second slice in real time. Or the like, or, alternatively,
the second allocating unit 322 acquires the real-time contention bandwidth requirements of the second ONUs belonging to all the second slices, and allocates the upstream contention bandwidth to the second ONUs within the new upstream contention-capable bandwidth resource according to a preset bandwidth contention rule.
Fig. 5 is a block diagram of another embodiment of a bandwidth allocation apparatus for an OLT slice according to the present invention. As shown in fig. 5, the apparatus may include a memory 51, a processor 52, a communication interface 53, and a bus 54. The memory 51 is used for storing instructions, the processor 52 is coupled to the memory 51, and the processor 52 is configured to execute the method of implementing the bandwidth allocation apparatus for OLT slicing described above based on the instructions stored in the memory 51.
The memory 51 may be a high-speed RAM memory, a non-volatile memory (non-volatile memory), or the like, and the memory 51 may be a memory array. The storage 51 may also be partitioned and the blocks may be combined into virtual volumes according to certain rules. The processor 52 may be a central processing unit CPU, or an application Specific Integrated circuit asic, or one or more Integrated circuits configured to implement the bandwidth allocation apparatus method for OLT slicing of the present invention.
In one embodiment, the present invention provides an optical line termination OLT comprising a bandwidth allocation arrangement as described above for an OLT slice. The invention also provides an optical network system, which comprises the optical line terminal OLT, and the optical network system can comprise a PON system and the like.
The bandwidth allocation device and the optical network system for the OLT slice provided in the embodiments provide a dynamic bandwidth allocation method applied to the OLT slice in the passive optical network, calculate and allocate an upstream contention bandwidth to the ONU belonging to the slice based on a slice upstream competitive bandwidth resource and a slice upstream real-time competitive bandwidth demand total amount corresponding to the slice, can perform fair bandwidth division for different slices in the OLT slice based on ONU granularity, effectively improve the bandwidth utilization rate of the network system, and have feasibility of existing network deployment and application.
The method and system of the present invention may be implemented in a number of ways. For example, the methods and systems of the present invention may be implemented in software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustrative purposes only, and the steps of the method of the present invention are not limited to the order specifically described above unless specifically indicated otherwise. Furthermore, in some embodiments, the present invention may also be embodied as a program recorded in a recording medium, the program including machine-readable instructions for implementing a method according to the present invention. Thus, the present invention also covers a recording medium storing a program for executing the method according to the present invention.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (13)

1. A bandwidth allocation method for an Optical Line Terminal (OLT) slice is characterized by comprising the following steps:
acquiring the total quantity of slice uplink real-time competition bandwidth requirements corresponding to each slice under a Passive Optical Network (PON) port of an OLT;
acquiring total resource of uplink competitive bandwidth of slices, and allocating the total resource of the uplink competitive bandwidth of the slices to the slices according to a preset allocation rule to acquire the uplink competitive bandwidth resource of the slices corresponding to the slices;
allocating an upstream competitive bandwidth to the optical network unit ONU belonging to the slice based on the slice upstream competitive bandwidth resource corresponding to the slice and the total slice upstream real-time competitive bandwidth demand, including:
if the uplink competitive bandwidth resource of the slice corresponding to the first slice is determined to be larger than or equal to the total amount of the uplink real-time competitive bandwidth requirement of the slice corresponding to the first slice, the uplink competitive bandwidth is allocated according to the real-time competitive bandwidth requirement of the first ONU belonging to the first slice in the uplink competitive bandwidth resource of the slice corresponding to the first slice;
removing the total amount of the uplink competitive bandwidth allocated to the first ONU belonging to the first slice from the uplink competitive bandwidth resources of the slice corresponding to the first slice, and obtaining the residual uplink competitive bandwidth resources;
summarizing the residual uplink competitive bandwidth resources and the slice uplink competitive bandwidth resources corresponding to the second slice to form new uplink competitive bandwidth resources; and the uplink competitive bandwidth resources of the slice corresponding to the second slice are less than the total real-time competitive bandwidth requirement of the uplink of the slice corresponding to the second slice.
2. The method of claim 1, further comprising:
allocating a slice uplink contendable bandwidth resource for the second slice within the new uplink contendable bandwidth resource.
3. The method of claim 2, wherein the allocating the second slice of slice upstream contendable bandwidth resources within the new upstream contendable bandwidth resource comprises:
and allocating the uplink competitive bandwidth resources for the second slice in the new uplink competitive bandwidth resources according to the proportional relation of the total uplink real-time competitive bandwidth demands of the second slice.
4. The method of claim 2, wherein the allocating the second slice of slice upstream contendable bandwidth resources within the new upstream contendable bandwidth resource comprises:
and acquiring real-time competition bandwidth requirements of second ONUs belonging to all the second slices, and allocating uplink competition bandwidth to the second ONUs in the new uplink competitive bandwidth resource according to a preset bandwidth competition rule.
5. The method of claim 1, wherein the obtaining of the total resource of the slice uplink contention bandwidth comprises:
acquiring the sum of uplink guaranteed bandwidths of ONU belonging to each slice under a PON port of an OLT;
and removing the sum of the uplink guaranteed bandwidths from the total amount of the available uplink bandwidths to obtain the total resource of the slice uplink competitive bandwidth.
6. A bandwidth allocation device for an Optical Line Terminal (OLT) slice, comprising:
the ONU bandwidth demand acquisition module is used for acquiring the total amount of slice uplink real-time competition bandwidth demands corresponding to each slice under the PON port of the OLT;
the slice bandwidth demand allocation module is used for acquiring the total uplink competitive bandwidth resources of the slices, allocating the total uplink competitive bandwidth resources of the slices to the slices according to a preset allocation rule and acquiring the uplink competitive bandwidth resources of the slices corresponding to the slices;
an upstream contention bandwidth allocation module, configured to allocate an upstream contention bandwidth to an optical network unit ONU belonging to the slice based on the slice upstream contendable bandwidth resource corresponding to the slice and the total slice upstream real-time contention bandwidth requirement amount;
the uplink contention bandwidth allocation module includes:
a first allocation unit, configured to allocate, within a slice upstream contendable bandwidth resource corresponding to a first slice, an upstream contendable bandwidth according to a real-time contention bandwidth requirement of a first ONU belonging to the first slice if it is determined that the slice upstream contendable bandwidth resource corresponding to the first slice is greater than or equal to a total amount of the slice upstream real-time contention bandwidth requirements corresponding to the first slice;
the first allocation unit is further configured to remove the total amount of the upstream competitive bandwidth allocated to the first ONU belonging to the first slice from the slice upstream competitive bandwidth resource corresponding to the first slice, and obtain a remaining upstream competitive bandwidth resource;
the uplink contention bandwidth allocation module further includes:
the second allocating unit is configured to aggregate the remaining uplink competitive bandwidth resources and the slice uplink competitive bandwidth resources corresponding to the second slice to form new uplink competitive bandwidth resources; the first allocation unit is further configured to remove the total amount of the upstream competitive bandwidth allocated to the first ONU belonging to the first slice from the upstream competitive bandwidth resource of the slice corresponding to the first slice.
7. The apparatus of claim 6,
the second allocating unit is configured to allocate the slice uplink contendable bandwidth resource to the second slice within the new uplink contendable bandwidth resource.
8. The apparatus of claim 7,
the second allocating unit is further configured to allocate, according to a proportional relationship of a total amount of real-time contention bandwidth demands for uplink transmission of the slice of the second slice, the uplink contention bandwidth resources to the second slice within the new uplink contention bandwidth resources.
9. The apparatus of claim 7,
the second allocating unit is further configured to acquire real-time contention bandwidth requirements of second ONUs belonging to all the second slices, and allocate uplink contention bandwidth to the second ONUs in the new uplink contention-capable bandwidth resource according to a preset bandwidth contention rule.
10. The apparatus of claim 6,
the ONU bandwidth requirement acquisition module is further configured to acquire a sum of uplink guaranteed bandwidths of the ONUs belonging to each slice under the PON port of the OLT;
the slice bandwidth demand allocation module is further configured to remove the total uplink guaranteed bandwidth from the total amount of available uplink bandwidth, and obtain the total slice uplink contention bandwidth resource.
11. A bandwidth allocation device for an Optical Line Terminal (OLT) slice, comprising:
a memory; and
a processor coupled to the memory, the processor being configured to perform the bandwidth allocation method for optical line termination, OLT, slice according to any of claims 1 to 5 based on instructions stored in the memory.
12. An optical line terminal, OLT,
comprising a bandwidth allocation arrangement for an optical line termination, OLT, slice according to any of claims 6 to 10.
13. An optical network system, characterized in that,
comprising an optical line termination OLT according to claim 12.
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