CN107484043B - Power optical fiber access network and control method thereof - Google Patents
Power optical fiber access network and control method thereof Download PDFInfo
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- CN107484043B CN107484043B CN201710562945.6A CN201710562945A CN107484043B CN 107484043 B CN107484043 B CN 107484043B CN 201710562945 A CN201710562945 A CN 201710562945A CN 107484043 B CN107484043 B CN 107484043B
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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
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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
- H04Q2011/0086—Network resource allocation, dimensioning or optimisation
Abstract
The invention provides an electric power optical fiber access network and a control method thereof, wherein a network architecture comprises a local side control center, an intelligent Optical Distribution Network (ODN) and a plurality of user side equipment (ONU), the local side control center collects real-time request service parameters of each ONU, dynamically groups the ONU according to the request service parameters of each ONU to form dynamic ONU communities, and distributes the dynamic ONU communities to different wavelength channels of each ONU community, thereby realizing the dynamic matching of a virtual OLT (optical line terminal) and ONU units in the local side control center and improving the flexibility of the network. The local side control center adopts a centralized mechanism to realize the resource allocation of each ONU, and utilizes a network resource virtualization technology to improve the utilization rate and flexibility of network resources.
Description
Technical Field
The invention relates to the technical field of power communication, in particular to a power optical fiber access network and a control method thereof.
Background
The power optical fiber home-entry provides power transmission for users, and simultaneously can transmit various control signals and network signals for the users so as to meet the use requirement of the modern smart power grid for realizing four-network integration of a power grid, a telecommunication network, a broadcast and television network and the Internet. The PFTTH (Power Fiber to The Home) can realize remote information acquisition and control interaction for users, such as Power utilization information acquisition, intelligent Power utilization bidirectional interaction, Power utilization analysis and control, and user and Power supply area service information interaction. Meanwhile, PFTTH is also required to carry traditional broadband and broadcast and television services, such as: the network management system has the advantages that the network demand of high bandwidth, the requirements of IPTV and multimedia information services (including telemedicine, teleeducation and government and enterprise informatization), the services of P2P (Peer-to-Peer), bidirectional video, high-definition video monitoring, base station transmission and the like are met, and the convergence of multiple networks puts an urgent requirement on the demand of large bandwidth of a single user. The PFTTH (Power Fiber To The Home) is an effective solution for four-network convergence, and The solution is To connect a communication office and a user by using an optical Fiber medium in an OPLC (optical Fiber link control), which is a composite cable with dual transmission capabilities of low-voltage Power and optical communication, and can provide a huge bandwidth access capacity for The user.
The current power fiber access Network includes a virtual OLT (Optical line terminal) pool and a plurality of user side devices ONU (Optical Network Unit), where the virtual OLT pool includes a plurality of virtual OLTs. The corresponding relationship between the virtual OLT and the user side equipment ONU is fixed, that is, when the ONU transmits the service data, the service data is transmitted to the fixed corresponding virtual OLT.
In the network architecture, some ONUs have large service data and some ONUs have small service data, so that the amount of service to be processed on each OLT is unequal, some OLTs are in an idle state, and some OLTs are in a crowded state, which is not favorable for the balance of the whole network and influences the stable operation of the whole network.
Disclosure of Invention
The present invention provides an electrical power fibre optic access network and a method of controlling the same that overcomes or at least partially solves the above mentioned problems.
According to one aspect of the invention, an electrical optical fiber access network is provided, which comprises a local side control center, an intelligent Optical Distribution Network (ODN) and a plurality of user side devices (ONU);
the local side control center is used for receiving service transmission requests sent by each ONU, and the data transmission requests comprise request service parameter information of the ONU; the ONU cluster grouping method is also used for clustering and grouping all the ONUs according to the request service parameter information of each ONU, forming an ONU community by the ONUs in the same group, and distributing a corresponding wavelength channel for each ONU community;
the intelligent optical distribution network ODN is used for selecting corresponding wavelengths for each ONU community according to the wavelength channels distributed by each ONU community, and broadcasting the wavelength channels corresponding to each ONU community to each ONU in the ONU communities;
each ONU is used for uploading the service to the local control center through the corresponding wavelength channel.
The invention has the beneficial effects that: the local side control center collects real-time request service parameters of each ONU, dynamically groups the ONU according to the request service parameters of each ONU to form dynamic ONU communities, and distributes the dynamic ONU communities to different wavelength channels of each ONU community, thereby realizing the dynamic matching of the virtual OLT and the ONU units and improving the flexibility of the network. The local side control center adopts a centralized mechanism to realize the resource allocation of each ONU, and utilizes a network resource virtualization technology to improve the utilization rate and flexibility of network resources.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the local side control center includes a virtual OLT pool and a controller, where the virtual OLT pool includes multiple virtual OLTs, and the network architecture further includes a secondary optical splitter;
the second-stage optical splitter is used for splitting optical signals from the OLT and distributing the split optical signals to each ONU; the optical signal processing unit is used for combining the optical splitting signals from each ONU and sending the combined optical signals to the ONU; each virtual OLT is used for receiving service transmission requests sent by the corresponding ONUs and sending the service transmission requests to the controller;
the controller is used for summarizing the service transmission request of each ONU received by each virtual OLT, and clustering and grouping all the ONUs according to the service transmission request of each ONU to form an ONU community; and the method is also used for allocating corresponding wavelength channels for each ONU community.
Further, the controller is configured to perform clustering grouping on all ONUs according to the service transmission request of each ONU, and specifically includes:
calculating the grade corresponding to each ONU according to the request service parameter in the service transmission request of each ONU;
using each ONU with the same grade as the same ONU community;
the request service parameter information includes the current service volume of the ONU, the total service request bandwidth size, each service class, and the bandwidth request size corresponding to the service of each class.
Further, the controller is further configured to:
for a plurality of ONUs in the same ONU community, carrying out time slot division on a wavelength channel corresponding to the ONU community by adopting a time division multiplexing technology according to the grade of each ONU and the bandwidth size of a service request to form a plurality of wavelength time slot resources, and allocating the corresponding wavelength time slot resources to each ONU;
each ONU is configured to upload a service to the corresponding virtual OLT through the wavelength time slot resource according to the wavelength time slot resource allocated by the controller.
Further, the controller is further configured to:
and adjusting the number of the ONUs in each ONU community by using a load balancing strategy according to the flow on the current wavelength channel of each ONU community, so that the flow load on the wavelength channel corresponding to each ONU community is equal.
According to another aspect of the present invention, there is provided a method for controlling a power optical fiber access network, including:
s1, the local side control center receives the service transmission request of each user side equipment ONU, the service transmission request includes the request service parameter;
s2, according to the request service parameter information of each ONU, clustering and grouping all ONUs, forming an ONU community by the ONUs in the same group, and distributing a corresponding wavelength channel for each ONU community;
s3, selecting a corresponding wavelength for each ONU community by adopting the ODN, and broadcasting the wavelength corresponding to each ONU community to each ONU in the ONU communities;
and S4, each ONU uploads the service to the central office control center through the corresponding wavelength channel.
Further, the office control center includes a virtual OLT pool and a controller, where the virtual OLT includes a plurality of virtual OLTs, and the method further includes:
splitting an optical signal from the OLT by adopting a secondary optical splitter, and distributing the split optical signal to each ONU; merging the split optical signals from each ONU, and sending the merged optical signals to the ONU;
the step S1 specifically includes:
and each virtual OLT receives the service transmission requests sent by the corresponding ONUs and uploads the service transmission requests to the controller so as to control the aggregation of the service transmission requests sent by each ONU.
Further, the step S2 specifically includes:
the controller calculates the grade corresponding to each ONU according to the request service parameter in the service transmission request of each ONU;
using each ONU with the same grade as the same ONU community;
distributing a corresponding wavelength channel for each ONU community, wherein the wavelength channel corresponding to each ONU community is different;
the request service parameter information includes the current service volume of the ONU, the total service request bandwidth size, each service class, and the bandwidth request size corresponding to the service of each class.
Further, the method further comprises:
for a plurality of ONUs in the same ONU community, time slot division is carried out on a wavelength channel corresponding to the ONU community by adopting a time division multiplexing technology according to the grade of each ONU and the bandwidth size of a service request, so that a plurality of wavelength time slot resources are formed;
and allocating corresponding wavelength time slot resources for each ONU so that each ONU uploads the service to the corresponding virtual OLT through the allocated wavelength time slot resources.
Further, the method further comprises:
and adjusting the number of the ONUs in each ONU community by using a load balancing strategy according to the flow on the current wavelength channel of each ONU community, so that the flow load on the wavelength channel corresponding to each ONU community is equal.
Drawings
FIG. 1 is a diagram of a power fiber optic access network according to one embodiment of the present invention;
fig. 2 is a block diagram of the internal connection of the central office control center in the electrical fiber access network according to another embodiment of the present invention;
fig. 3 is a diagram of a dynamically constructed ONU community architecture according to an embodiment of the present invention;
fig. 4 is a flowchart of a control method of an electrical fiber access network according to another embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 provides an electrical fiber access network according to an embodiment of the present invention, where the network architecture includes a central office end control center, an intelligent optical distribution network ODN, and a plurality of user-side devices ONU.
The local side control center is used for receiving service transmission requests sent by each ONU, and the data transmission requests comprise request service parameter information of the ONU; and the ONU cluster grouping method is also used for clustering and grouping all the ONUs according to the request service parameter information of each ONU, forming an ONU community by the ONUs in the same group, and distributing a corresponding wavelength channel for each ONU community. The intelligent optical distribution network ODN is used for selecting corresponding wavelengths for each ONU community according to the wavelength channels distributed by each ONU community, and broadcasting the wavelength channels corresponding to each ONU community to each ONU in the ONU communities; each ONU is used for uploading the service to the local control center through the corresponding wavelength channel.
With the rapid increase of the number of users, internet services and various applications, the branch number of the ODN and the number of the covered ONUs under the existing broadband access network architecture are larger and larger, and the network topology structure is also more and more complex, which all increase the polling period to cause the network performance to be degraded. Therefore, the present embodiment proposes to group ONUs and apply the concept of community to PON, and the concept can also be applied to a power fiber-to-the-home scheme.
The power optical fiber access network provided by this embodiment mainly comprises three parts, namely, a virtualized local side control center located in a communication machine room, an intelligent optical distribution network ODN located in a distribution room, an optical network unit located in a user home, and a user side device ONU. In the whole network architecture, the ODN is located at a position close to the virtual OLT, each user side equipment ONU sends a service transmission request to the local side control center, and requests the local side control center to allocate resources for the local side equipment ONU, wherein the service transmission request comprises a request service parameter. And the local side control center performs clustering grouping on each ONU in the whole network according to the request service parameter information of each ONU to form a plurality of different ONU communities, wherein each ONU community shares one wavelength channel. After all the ONUs are clustered and grouped, the central office side control center allocates a corresponding wavelength channel for each ONU group. And selecting a corresponding wavelength for each ONU community by the ODN according to the wavelength channel allocated to each ONU community, and broadcasting the wavelength channel corresponding to each ONU community to each ONU in the ONU community so that each ONU uploads the service to the OLT through the allocated wavelength channel. The intelligent optical distribution network ODN comprises an amplifier and an intelligent wavelength selection switch, wherein the amplifier is mainly used for amplifying channels, and the intelligent wavelength selection switch is used for selecting the wavelength corresponding to each channel by the intelligent wavelength selection switch after the office control center allocates a wavelength channel to each ONU community.
The office control center of this embodiment collects real-time request service parameters of each ONU, and performs dynamic grouping according to the request service parameters of each ONU to form a dynamic ONU community, and allocates different wavelength channels to each ONU community, so that dynamic matching between the virtual OLT and the ONU units can be realized, and the flexibility of the network is improved. The local side control center adopts a centralized mechanism to realize the resource allocation of each ONU, and utilizes a network resource virtualization technology to improve the utilization rate and flexibility of network resources.
In an embodiment of the present invention, the central office control center includes a virtual OLT pool and a controller, where the virtual OLT pool includes a plurality of virtual OLTs, and the network architecture further includes a secondary optical splitter.
The second-stage optical splitter is used for splitting optical signals from the OLT and distributing the split optical signals to each ONU; the optical signal processing unit is used for combining the optical splitting signals from each ONU and sending the combined optical signals to the ONU; each virtual OLT is used for receiving service transmission requests sent by the corresponding ONUs and sending the service transmission requests to the controller; the controller is used for summarizing the service transmission request of each ONU received by each virtual OLT, and clustering and grouping all the ONUs according to the service transmission request of each ONU to form an ONU community; and the method is also used for allocating corresponding wavelength channels for each ONU community.
In the network architecture of this embodiment, referring to fig. 2, the local side control center includes a virtual OLT pool and a controller, where the virtual OLT pool includes a plurality of virtual OLTs, and the network architecture further includes a secondary optical splitter. The secondary optical splitter has the main functions of splitting optical signals from the OLT and distributing the split optical signals to each ONU; and the optical signal combiner is used for combining the optical splitting signals from each ONU and sending the combined optical signals to the ONU. For example, a two-stage optical splitter is configured with 1: and N is used for splitting, namely, one optical path signal is split into N parts to form N split signals which are respectively distributed to N ONUs. When an ONU in an ONU group sends a service transmission request to the central office control center, the ONU sends the service transmission request to the corresponding virtual OLT through the allocated optical splitting signal. In the process that each ONU sends a service transmission request to the corresponding OLT, the secondary optical splitter combines the optical signals of each ONU into one optical signal and distributes the optical signal to the corresponding OLT, so that the OLT can receive the service transmission request of each ONU. The virtual OLT transmits the received service transmission requests transmitted by the plurality of ONUs to a controller in the local control center, and the controller summarizes the service transmission requests transmitted by all the ONUs. After summarizing the service transmission requests sent by all the ONUs, the controller clusters and groups the ONUs in the whole access network according to the request service parameters in the service transmission request of each ONU to form ONU communities, and allocates corresponding wavelength channels for each ONU community, wherein all the ONUs in one ONU community share one wavelength channel, and the wavelength channels corresponding to different ONU communities are different.
In this embodiment, all ONUs are clustered and grouped, a wavelength division multiple access technology WDMA is used to allocate wavelength channels to different ONU communities, and all ONUs in the same ONU community share one wavelength channel.
In another embodiment of the present invention, the controller is configured to perform clustering grouping on all ONUs according to a service transmission request of each ONU, and specifically includes: calculating the grade corresponding to each ONU according to the request service parameter in the service transmission request of each ONU; using each ONU with the same grade as the same ONU community; the request service parameter information includes the current service volume of the ONU, the total service request bandwidth size, each service class, and the bandwidth request size corresponding to the service of each class.
In the process that the controller performs clustering grouping on all ONUs, service transmission requests sent by each ONU carry request service parameters such as the current service volume of the ONU, the total service request bandwidth size, and the bandwidth request size corresponding to each service class and each class of service. And the controller calculates the grade corresponding to each ONU according to the request service parameters in the service transmission request of each ONU. Since there are many ONUs in the entire network, there are usually many ONUs at each level, so in this embodiment, a plurality of ONUs at the same level are grouped into one group to form an ONU community, and each ONU community is assigned with a corresponding wavelength channel, and all ONUs in the ONU community transmit service data to the outside through the same wavelength channel.
In one embodiment of the present invention, the controller is further configured to: for a plurality of ONUs in the same ONU community, carrying out time slot division on a wavelength channel corresponding to the ONU community by adopting a time division multiplexing technology according to the grade of each ONU and the bandwidth size of a service request to form a plurality of wavelength time slot resources, and allocating the corresponding wavelength time slot resources to each ONU; each ONU is configured to upload a service to the corresponding virtual OLT through the wavelength time slot resource according to the wavelength time slot resource allocated by the controller.
In the above embodiment, after the controller in the OLT in the central office end control center allocates a wavelength channel to each ONU group, for multiple ONUs in the same ONU group, a time division multiplexing TDMA is used to allocate channel time slot resources to each ONU. Specifically, according to the grade of each ONU in the same ONU group and the bandwidth size of the service request, time slot division is performed on the wavelength channel corresponding to the ONU group by using a time division multiplexing technique, the wavelength of the entire channel is divided into a plurality of time slots, a plurality of wavelength time slot resources are formed, and a corresponding time slot wavelength resource is allocated to each ONU. For example, if the level of a certain service is relatively high, the requirement on real-time performance is relatively high, and the requested bandwidth is relatively large, the time slot wavelength resource allocated to the ONU by the controller at this time will be relatively large. And each ONU in the same ONU community uploads the service to the corresponding virtual OLT through the allocated wavelength time slot resource according to the wavelength time slot resource allocated by the controller.
In another embodiment of the present invention, the controller is further configured to: and adjusting the number of the ONUs in each ONU community by using a load balancing strategy according to the flow on the current wavelength channel of each ONU community, so that the flow load on the wavelength channel corresponding to each ONU community is as equal as possible.
In the above embodiment, the controller performs clustering grouping on all ONUs, and assigns a corresponding wavelength channel to each ONU group. Referring to fig. 3, in this embodiment, the controller may detect the traffic on the current wavelength channel of each ONU community in real time, and adjust the number of ONUs in each ONU community by using a load balancing strategy, that is, dynamically adjust each ONU community to form a dynamic ONU community, where the number of each ONU in each ONU community and each ONU is dynamically changed, so that the traffic on the wavelength channel corresponding to each ONU community is equal or approximately equal, thereby avoiding that resources on some wavelength channels are idle and resources on some wavelength channels are congested, and improving the resource utilization rate.
In the application, in consideration of the geographical positions and service burst characteristics of the power optical fiber access users, such as business areas and residential areas, business and residential mixed areas, suburban areas and other different geographical positions with unbalanced service flow distribution, the network resource utilization rate of the users in idle time is low, and large cost overhead and resource waste are caused. In a traditional PON, a fixed corresponding relation is kept between a virtual OLT and ONUs, the services of the ONUs are only uploaded to the corresponding OLTs for processing, when the ONU traffic is small, OLT resources are idle, and therefore the utilization rate of network resources is reduced, and under an OLT virtualization framework, the virtual OLT resources located in a communication machine room do not keep a fixed corresponding relation with the ONUs, but can dynamically process the services from different ONUs according to factors such as traffic and the like, so that the resource utilization rate is greatly improved, and energy consumption and time delay are reduced.
Referring to fig. 4, a method for controlling an electrical fiber access network according to another embodiment of the present invention includes: s1, the local side control center receives the service transmission request of each user side equipment ONU, the service transmission request includes the request service parameter; s2, according to the request service parameter information of each ONU, clustering and grouping all ONUs, forming an ONU community by the ONUs in the same group, and distributing a corresponding wavelength channel for each ONU community; s3, selecting a corresponding wavelength for each ONU community by adopting the ODN, and broadcasting the wavelength corresponding to each ONU community to each ONU in the ONU communities; and S4, each ONU uploads the service to the central office control center through the corresponding wavelength channel.
Specifically, each user side device ONU sends a service transmission request to the office side control center, and requests the office side control center to allocate resources for itself, where the service transmission request includes a request service parameter. And the local side control center performs clustering grouping on each ONU in the whole network according to the request service parameter information of each ONU to form a plurality of different ONU communities, wherein each ONU community shares one wavelength channel. After all the ONUs are clustered and grouped, the central office side control center allocates a corresponding wavelength channel for each ONU group. And selecting a corresponding wavelength for each ONU community by the ODN according to the wavelength channel allocated to each ONU community, and broadcasting the wavelength channel corresponding to each ONU community to each ONU in the ONU community so that each ONU uploads the service to the OLT through the allocated wavelength channel.
The office control center of this embodiment collects real-time request service parameters of each ONU, and performs dynamic grouping according to the request service parameters of each ONU to form a dynamic ONU community, and allocates different wavelength channels to each ONU community, so that dynamic matching between the virtual OLT and the ONU units can be realized, and the flexibility of the network is improved. The local side control center adopts a centralized mechanism to realize the resource allocation of each ONU, and utilizes a network resource virtualization technology to improve the utilization rate and flexibility of network resources.
In another embodiment of the present invention, the central office control center includes a virtual OLT pool and a controller, where the virtual OLT pool includes a plurality of virtual OLTs, and the method further includes: splitting an optical signal from the OLT by adopting a secondary optical splitter, and distributing the split optical signal to each ONU; and combining the split optical signals from each ONU, and sending the combined optical signals to the ONU. The step S1 specifically includes: and each virtual OLT receives the service transmission requests sent by the corresponding ONUs and uploads the service transmission requests to the controller so as to control the aggregation of the service transmission requests sent by each ONU.
Specifically, in the entire network architecture, after all ONUs are clustered and grouped, a secondary optical splitter is used to allocate a corresponding ONU to each virtual OLT in the central office control center, where in this embodiment, one virtual OLT corresponds to all ONUs in one ONU community, that is, service data of all NOU in one ONU community is finally transmitted to a corresponding virtual OLT.
In an embodiment of the present invention, the step S2 specifically includes: the controller calculates the grade corresponding to each ONU according to the request service parameter in the service transmission request of each ONU; using each ONU with the same grade as the same ONU community; distributing a corresponding wavelength channel for each ONU community, wherein the wavelength channel corresponding to each ONU community is different; the request service parameter information includes the current service volume of the ONU, the total service request bandwidth size, each service class, and the bandwidth request size corresponding to the service of each class.
When the controller clusters and groups all the ONUs in the network, the controller calculates the grade corresponding to each ONU according to the request service parameter in the service transmission request of each ONU. Each ONU with the same grade is used as the same ONU community, and the controller allocates a corresponding wavelength channel for each ONU community, so that all the ONUs in the same ONU community share one wavelength channel, and the utilization rate of the wavelength channel is improved. The controller calculates the grade corresponding to each ONU according to the current service volume of the ONU, the total service request bandwidth size, each service grade and the bandwidth request size corresponding to the service of each grade, which are contained in the request service parameter information.
In another embodiment of the present invention, the method further comprises: for a plurality of ONUs in the same ONU community, time slot division is carried out on a wavelength channel corresponding to the ONU community by adopting a time division multiplexing technology according to the grade of each ONU and the bandwidth size of a service request, so that a plurality of wavelength time slot resources are formed; and allocating corresponding wavelength time slot resources for each ONU so that each ONU uploads the service to the corresponding virtual OLT through the allocated wavelength time slot resources.
In the above embodiment, after the controller in the OLT in the central office end control center allocates a wavelength channel to each ONU group, for multiple ONUs in the same ONU group, a time division multiplexing TDMA is used to allocate channel time slot resources to each ONU. Specifically, according to the grade of each ONU in the same ONU group and the bandwidth size of the service request, time slot division is performed on the wavelength channel corresponding to the ONU group by using a time division multiplexing technique, the wavelength of the entire channel is divided into a plurality of time slots, a plurality of wavelength time slot resources are formed, and a corresponding time slot wavelength resource is allocated to each ONU. And the ONU transmits the service data to the corresponding virtual OLT through the allocated time slot resources.
In one embodiment of the invention, the method further comprises: and adjusting the number of the ONUs in each ONU community by using a load balancing strategy according to the flow on the current wavelength channel of each ONU community, so that the flow on the wavelength channel corresponding to each ONU community is equal.
The controller performs clustering grouping on all the ONU groups and allocates a corresponding wavelength channel for each ONU group. In this embodiment, the controller may detect the traffic on the current wavelength channel of each ONU community in real time, and adjust the number of ONUs in each ONU community by using a load balancing strategy, that is, dynamically adjust each ONU community, so that traffic on the wavelength channel corresponding to each ONU community is equal or approximately equal, thereby avoiding resource idleness on some wavelength channels and congestion on some wavelength channels, and improving resource utilization.
In this embodiment, a load balancing policy is adopted, the ONU communities are dynamically adjusted according to the traffic on the wavelength channel corresponding to each ONU community, and the correspondence between each ONU and the virtual OLT also dynamically changes along with the dynamic adjustment of the ONU communities, so that resources are reasonably allocated, and the utilization rate of the resources is improved.
The invention provides an electric power optical fiber access network and a control method thereof, aiming at providing reliable transmission and high-efficiency operation and maintenance for high-bandwidth access of large-scale users. The network architecture comprises a local side control center, an intelligent Optical Distribution Network (ODN) and a plurality of user side equipment (ONU), and the network structure adopts a two-layer hierarchical ODN form and a clustered ONU deployment mode according to the distribution characteristics of an electric power transmission line, combines a Time Division Multiplexing (TDMA) technology with a Wavelength Division Multiplexing (WDMA) technology, and can solve the problem of electric power fiber-to-the-home network deployment under the limiting conditions of multi-level light division, multiple photoelectric separation and the like. The virtualized OLT pool is responsible for processing the converged services, dynamic community of the ONU is realized according to service parameters, and corresponding time slot wavelength resources and calculation processing resources are allocated to the ONU.
The invention mainly aims at the condition of accessing a large number of ONU, ensures the bandwidth requirement of users, improves the bandwidth utilization ratio and reduces the time delay under the condition of limited capital investment and bandwidth resources.
Finally, the method of the present application is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An electric power optical fiber access network is characterized by comprising a local side control center, an intelligent Optical Distribution Network (ODN) and a plurality of user side equipment (ONU);
the local side control center is used for receiving service transmission requests sent by each ONU, and the service transmission requests comprise request service parameter information of the ONU; the ONU cluster management system is also used for clustering and grouping all the ONUs into a plurality of ONU communities according to the request service parameter information of each ONU and allocating corresponding wavelength channels for each ONU community;
the intelligent optical distribution network ODN is used for selecting corresponding wavelengths for each ONU community according to the wavelength channels distributed by each ONU community, and broadcasting the wavelength channels corresponding to each ONU community to each ONU in the ONU communities;
each ONU is used for uploading the service to the local side control center through a corresponding wavelength channel;
the central office control center includes a virtual OLT (optical line terminal) pool and a controller, where the virtual OLT pool includes multiple virtual OLTs, and the network further includes a secondary optical splitter;
the second-stage optical splitter is used for splitting optical signals from the OLT and distributing the split optical signals to each ONU; the optical signal processing unit is used for combining the optical splitting signals from each ONU and sending the combined optical signals to the OLT;
each virtual OLT is used for receiving service transmission requests sent by the corresponding ONUs and sending the service transmission requests to the controller;
the controller is used for summarizing the service transmission request of each ONU received by each virtual OLT, and clustering and grouping all the ONUs according to the service transmission request of each ONU to form an ONU community; and the method is also used for allocating corresponding wavelength channels for each ONU community.
2. The electrical fiber access network of claim 1, wherein the controller, configured to perform cluster grouping on all ONUs according to the service transmission request of each ONU, specifically comprises:
calculating the grade corresponding to each ONU according to the request service parameter in the service transmission request of each ONU;
using each ONU with the same grade as the same ONU community;
the request service parameter information includes the current service volume of the ONU, the total service request bandwidth size, each service class, and the bandwidth request size corresponding to the service of each class.
3. The electrical fiber optic access network of claim 1, wherein the controller is further configured to:
for a plurality of ONUs in the same ONU community, carrying out time slot division on a wavelength channel corresponding to the ONU community by adopting a time division multiplexing technology according to the grade of each ONU and the bandwidth size of a service request to form a plurality of wavelength time slot resources, and allocating the corresponding wavelength time slot resources to each ONU;
each ONU is configured to upload a service to the corresponding virtual OLT through the wavelength time slot resource according to the wavelength time slot resource allocated by the controller.
4. The electrical fiber optic access network of claim 3, wherein the controller is further configured to:
and adjusting the number of the ONUs in each ONU community by using a load balancing strategy according to the flow on the current wavelength channel of each ONU community, so that the flow load on the wavelength channel corresponding to each ONU community is equal.
5. A method for controlling a power fiber access network, comprising:
s1, the local side control center receives the service transmission request of each user side equipment ONU, the service transmission request includes the request service parameter;
s2, according to the request service parameter information of each ONU, clustering and grouping all ONUs, forming an ONU community by the ONUs in the same group, and distributing a corresponding wavelength channel for each ONU community;
s3, selecting a corresponding wavelength for each ONU community by adopting an intelligent Optical Distribution Network (ODN) according to the wavelength channel distributed to each ONU community, and broadcasting the wavelength corresponding to each ONU community to each ONU in the ONU communities;
s4, each ONU uploads the service to the local control center through the corresponding wavelength channel;
the central office control center includes a virtual OLT pool and a controller, the virtual OLT includes a plurality of virtual OLTs, and the method further includes:
splitting an optical signal from the OLT by adopting a secondary optical splitter, and distributing the split optical signal to each ONU; merging the optical splitting signals from each ONU, and sending the merged optical signals to the OLT;
the step S1 specifically includes:
and each virtual OLT receives the service transmission requests sent by the corresponding ONUs and uploads the service transmission requests to the controller so as to control the aggregation of the service transmission requests sent by each ONU.
6. The method for controlling an electrical fiber optic access network according to claim 5, wherein the step S2 specifically includes:
the controller calculates the grade corresponding to each ONU according to the request service parameter in the service transmission request of each ONU;
using each ONU with the same grade as the same ONU community;
distributing a corresponding wavelength channel for each ONU community, wherein the wavelength channel corresponding to each ONU community is different;
the request service parameter information includes the current service volume of the ONU, the total service request bandwidth size, each service class, and the bandwidth request size corresponding to the service of each class.
7. The method of controlling a powered fiber optic access network of claim 6, wherein the method further comprises:
for a plurality of ONUs in the same ONU community, time slot division is carried out on a wavelength channel corresponding to the ONU community by adopting a time division multiplexing technology according to the grade of each ONU and the bandwidth size of a service request, so that a plurality of wavelength time slot resources are formed;
and allocating corresponding wavelength time slot resources for each ONU so that each ONU uploads the service to the corresponding virtual OLT through the allocated wavelength time slot resources.
8. The method of controlling a powered fiber optic access network of claim 7, wherein the method further comprises:
and adjusting the number of the ONUs in each ONU community by using a load balancing strategy according to the flow on the current wavelength channel of each ONU community, so that the flow load on the wavelength channel corresponding to each ONU community is equal.
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| CN101621454A (en) * | 2008-06-30 | 2010-01-06 | 华为技术有限公司 | Passive optical network system, optical line terminal and optical network units |
| EP2533448A2 (en) * | 2011-06-09 | 2012-12-12 | Telefonaktiebolaget L M Ericsson (publ) | Method for fast wavelength division multiplexing (WDM) passive optical network (PON) initialization in heterogeneous networks |
| CN202634634U (en) * | 2012-04-17 | 2012-12-26 | 国网电力科学研究院 | OLT device being adapted with electric light access network |
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