CN111865419B

CN111865419B - 5G-oriented intelligent optical access network local side cloud system based on building block type architecture

Info

Publication number: CN111865419B
Application number: CN202010645445.0A
Authority: CN
Inventors: 朱敏; 任雪琦; 周怡君; 岳鹏; 顾萍萍
Original assignee: Southeast University; Taicang T&W Electronics Co Ltd
Current assignee: Southeast University; Taicang T&W Electronics Co Ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2021-09-28
Anticipated expiration: 2040-07-07
Also published as: CN111865419A; WO2022007472A1

Abstract

The invention discloses a 5G-oriented intelligent optical access network local side cloud system based on a building block type architecture, which comprises: the system comprises three resource pools, namely a virtual OLT line terminal pool, a virtual baseband processing unit (vBBU) pool, a server pool for bearing virtual network functions (vNF), an OpenFlow virtual switch and a client layer agent thereof, an intelligent access cloud system software definition controller and a network function virtualization arrangement controller; the OpenFlow virtual switch connects the three resource pools together, and the three resource pools are interconnected and intercommunicated. The core function of the invention is to realize future intelligent access cloud system with the integration of optical fiber, wireless and edge data centers, and to adopt a building block type architecture to complete one-time innovation and upgrade of the traditional optical access network local side station, and the invention has the characteristics of open cloud, module combination, flexible deployment, simplified operation and maintenance and the like.

Description

5G-oriented intelligent optical access network local side cloud system based on building block type architecture

Technical Field

The invention relates to the field of 5G and optical fiber communication, in particular to a 5G-oriented intelligent optical access network local side cloud system based on a building block type architecture.

Background

In recent years, Passive Optical Networks (PON) have become the mainstream technology for fiber to the home/to the building (FTTH/FTTB) applications in the field of optical access networks, with home penetration rates reaching 50% -75% in developed countries. In 2018, FTTH/FTTB users in Asia-Pacific region account for 76% of total users in the world, and China becomes one of the countries in the world with the largest number of FTTH/FTTB users. The extensive deployment of optical access networks consumes a lot of energy, which accounts for about 70% of the energy consumption of the entire telecommunications network. With the continuous development of 5G applications, optical fronthaul networks based on PON technology have become the most promising solution. With various internet applications (such as video conferences, smart home systems, IPTV and the like) rising, network services are increasingly diversified and complicated, different requirements are put forward on bandwidth requirements and network performance, and requirements for customization and differentiation are increasingly urgent. Therefore, the traditional optical access network architecture and technology are difficult to meet the requirements, and the future intelligent access with the integration of optical fiber, wireless and data center is constructed as the primary target of telecommunication operators.

In 2008, new technologies represented by Software Defined Networking (SDN) and Network Function Virtualization (NFV) opened a booming of future network and communication research. In 2017, a global future network development peak is called by Nanjing, and Liu Yun Jie is indicated in a meeting report, and the Internet has met with a new round of historical change and will enter a future network development stage. The access network research based on the SDN/NFV idea starts later until 2015, AT & T proposes a Central Office reconfiguration Data Center project (referred to as Central Office Re-Architected as a Data Center, CORD for short), which aims to reconfigure a telecommunication Central Office CO to a Data Center similar to a cloud service provider, and flexibly provide network and information services. On the basis of CORD, the project further integrates new technologies such as resource pooling (clouding), software-defined optical switching and machine learning artificial intelligence, and the like, so that green intelligent access cloud system equipment integrating optical fiber access and 5G mobile forwarding based on a building block type framework is achieved. The project product is in the leading position at home and abroad, the market prospect is very good, and the market potential is very huge.

In recent years, some research efforts have attempted to introduce SDN technology into optical access networks. Hamzeh khalii et al, university of spanish UPC, implements a software-defined-based SIEPON system, where functions of Reporting, Gating, and the like of a MAC control layer in OLT devices are virtualized, and a part of the virtualized functions are transferred to an SDN central controller. Experiments OF Steven s.w.lee, et al, university OF taiwan, have proposed that the entire GPON system is abstracted into a virtual OpenFlow switch, and an OF agent embedded in the OLT communicates with an external SDN central controller on one hand, and controls all ONUs through an ONU Management Control Interface (OMCI) on the other hand. However, these schemes only apply the SDN concept to the packet forwarding process, and do not relate to the control architecture and resource configuration aspects of the PON. The Xiao Duan et al of Bangor university in England proposes a novel time division/wavelength division multiplexing passive optical network, realizes a digital orthogonal filter with an embedded transceiver in OLT and each ONU, and adopts a centralized SDN controller for control, so that the ONU can be dynamically and adaptively accessed into a shared feeder optical fiber, and the system reconfigurability and intellectualization are increased. Divya Chitimalla et al, university of California, USA, proposes a software defined EPON system that is aware of the service application layer, and utilizes the collected client information to dynamically adjust the resource allocation strategy and improve the ONU user experience. However, these schemes do not involve new technologies such as NFV, resource pooling, and intelligent optimization configuration, and the original structure is still continued on the network architecture, and the fusion of the optical fiber access and the mobile service is not realized.

In the face of the development demand of future intelligent access networks, the traditional access network system exposes its limitations in many aspects. First, a closed network control architecture creates a barrier to resource sharing, lacks global view and network real-time status information, and cannot rapidly respond to network traffic changes to schedule resources. Network control lacks flexibility and operation control cost is high. Secondly, a consistent data model is lacked to structurally abstract the heterogeneous resource description, and an effective control model is lacked to manage and allocate abstract resources, so that the consistent service experience of a user under the conditions of multiple scenes and multiple services is difficult to meet. Thirdly, the requirements of service diversification and user customization cannot be met, the updating duration of the network equipment is long, the cost is high, the standardization process is complex, and the method is in sharp contrast with a network service rapid innovation mode.

Disclosure of Invention

The technical problem is as follows: the invention aims to provide a 5G-oriented intelligent optical access network local side cloud system based on a building block architecture, which greatly reduces network cost and energy consumption and can obtain higher reliability and flexibility aiming at the defects of the prior art.

The technical scheme is as follows: the invention discloses a 5G-oriented intelligent optical access network local side cloud system based on a building block type architecture, which comprises a control plane and a transmission plane, wherein the control plane comprises: the intelligent access cloud system software definition controller and the network function virtualization arrangement controller; the conveying plane comprises: the system comprises a resource pool, an OpenFlow virtual switch and a client layer agent thereof; the resource pool comprises a virtual OLT line terminal pool, a virtual baseband processing unit vBBU pool and a server pool for bearing virtual network functions vNF.

In the preferred scheme of the invention, based on the intelligent optical access network local side cloud system facing 5G of the building block type architecture, the virtual OLT line terminal pool virtualizes the function of the OLT line card and maps the function to a universal x86 server to realize the function, and provides the uplink and downlink data service forwarding function of the OLT line card; the virtual baseband processing unit vBBU pool virtualizes BBU functions and maps the BBU functions to a general x86 server to realize the BBU functions, and the baseband signal processing function of the RAN mobile service is completed; the server pool bearing the virtual network function vNF maps the control plane function on the traditional OLT and the function of a mobile communication core network to a universal x86 server to realize the function, and provides edge cloud service; the three resource pools are connected together by the OpenFlow virtual switch, and are interconnected to form a building block type framework.

Has the advantages that: compared with the prior art, the invention has the following advantages:

1) compared with the traditional optical access network equipment, the invention faces to a 5G intelligent access cloud system, thoroughly subverts the traditional access network architecture, adopts a building block type architecture and builds an intelligent broadband access network supporting the whole service.

2) The invention utilizes NFV technology, can add and control the virtual equipment with modularized functions rapidly according to the needs, provides various differentiated application programs and services, and can greatly shorten the development period like building blocks.

3) The invention adopts a building block type architecture, completes one innovation on the whole optical access network, has the characteristics of open clouding, module combination, flexible deployment, simplified operation and maintenance and the like, and can be used for coping with the existing and future applications and services in a flexible and changeable way, thereby not only greatly reducing the network cost and energy consumption, but also obtaining higher reliability and flexibility, and greatly improving the user service and technical innovation under a new service pattern.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a process are given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1, the building block architecture based 5G-oriented intelligent optical access network office cloud system provided in this embodiment includes a control plane and a transport plane, where the control plane includes: the intelligent access cloud system software definition controller and the network function virtualization arrangement controller; the conveying plane comprises: the system comprises a resource pool, an OpenFlow virtual switch and a client layer agent thereof; the resource pool comprises a virtual OLT line terminal pool, a virtual baseband processing unit vBBU pool and a server pool for bearing virtual network functions vNF.

In this embodiment, based on a building block architecture 5G-oriented intelligent optical access network local side cloud system, the virtual OLT line terminal pool virtualizes the function of the OLT line card and maps the function to a general x86 server to implement the function, so as to provide an uplink and downlink data service forwarding function of the OLT line card; the virtual baseband processing unit vBBU pool virtualizes BBU functions and maps the BBU functions to a general x86 server to realize the BBU functions, and the baseband signal processing function of the RAN mobile service is completed; the server pool bearing the virtual network function vNF maps the control plane function on the traditional OLT and the function of a mobile communication core network to a universal x86 server to realize the function, and provides edge cloud service; the three resource pools are connected together by the OpenFlow virtual switch, and are interconnected to form a building block type framework.

As shown in fig. 1, a virtual OLT line terminal pool is connected to a wireless optical access network PON in a southbound direction and connected to a core network in a northbound direction, so as to forward uplink and downlink data services of a terminal user; a virtual OLT line terminal pool, a virtual baseband processing unit vBBU pool and a server pool for bearing a virtual network function vNF in a transmission plane are all connected with the OpenFlow virtual switch to realize data interaction among the three resource pools; an intelligent access cloud system software definition controller and a network function virtualization arrangement controller in a control plane realize the control and management of the three resource pools through an OpenFlow client layer agent in a transport plane.

The above examples are only preferred embodiments of the present invention, it should be noted that: it will be apparent to those skilled in the art that various modifications and equivalents can be made without departing from the spirit of the invention, and it is intended that all such modifications and equivalents fall within the scope of the invention as defined in the claims.

Claims

1. A5G-oriented intelligent optical access network local side cloud system based on a building block architecture is characterized by comprising a control plane and a transmission plane, wherein the control plane comprises: the intelligent access cloud system software definition controller and the network function virtualization arrangement controller; the conveying plane comprises: the system comprises a resource pool, an OpenFlow virtual switch and a client layer agent thereof; the resource pool comprises a virtual OLT line terminal pool, a virtual baseband processing unit vBBU pool and a server pool for bearing virtual network functions vNF;

the virtual OLT line terminal pool virtualizes the functions of the OLT line cards and maps the functions to a general x86 server to realize the functions of forwarding uplink and downlink data services of the OLT line cards; the virtual baseband processing unit vBBU pool virtualizes BBU functions and maps the BBU functions to a general x86 server to realize the BBU functions, and the baseband signal processing function of the RAN mobile service is completed; the server pool bearing the virtual network function vNF maps the control plane function on the traditional OLT and the function of a mobile communication core network to a universal x86 server to realize the function, and provides edge cloud service; the virtual OLT line terminal pool, the virtual baseband processing unit vBBU pool and the server pool for bearing the virtual network function vNF are connected together by the OpenFlow virtual switch, and are interconnected and communicated to form a building block type architecture;

an intelligent access cloud system software definition controller and a network function virtualization arrangement controller in a control plane realize the control and management of the three resource pools through an OpenFlow client layer agent in a transport plane.