With the rise of emerging internet businesses, data traffic has experienced explosive growth. Focusing on the ultra-high-speed single wave technology, extended band technology, and new optical fiber technology in ultra-high-speed and large-capacity optical transmission systems, this paper provides a detailed introduction to their key technologies, development status, and related industry advancements. It discusses the key technologies and future development directions of ultra-high-speed and large-capacity optical transmission systems.
As international and industry standards for Fiber To The Room (FTTR) have been progressively established, the development and construction of FTTR has become the common view of the communication community. However, the FTTR system architecture and key technical solutions have not been fully converged and unified. There is still an urgent need to promote standardization work forward and speed up the industrial development. This paper introduces the current status and prospects of FTTR technology from three aspects of system architecture, key technologies and standardization process.
With the rapid development of network technology, users have higher requirements for their home network. Fiber to the room (FTTR) can solve the problem of an unstable wireless network. Based on the FTTR architecture, a centralized wireless-optical access network is introduced. Then, the main principles of coordinated spatial reuse technology and rate adaption for the next generation of Wi-Fi are discussed. Finally, the current challenges and future research directions are analyzed and prospected.
Various applications and digital innovations have driven the development and evolution of passive optical networks (PON) to higher speeds. As the next-generation evolution of 10G PON technology, 50G-PON has essentially completed the standard formulation, and is currently in the process of technological and industrial breakthroughs. 50G-PON can realize coexistence and smooth upgrading with operators’ existing PON networks by means of wavelength division. For the GPON region and EPON region, operators can adopt G/XGS/50G-PON three-mode optical modules and 10GE/50G-PON two-mode optical modules respectively to realize the coexistence of multi-generation PON technologies in the same optical distribution network (ODN). For the future ultra-50G PON technology, this paper focuses on how to realize ultra-50G large bandwidth transmission capability over single wavelength. The current main candidate technology solutions include coherent and intensity modulation direct detection (IM-DD).
In response to the explosive increase in the demand for optical fiber resources in 5G fronthaul networks, this paper proposes a low-cost WDM PON architecture and system that uses WDM and single-fiber bidirectional technologies to save more than 78% of the backbone and distribution optical fiber resources. In addition, the system has the advantages of few types of optical modules, maintainability and manageability, and high reliability. Research on key technologies such as low-cost tunable module and envelope modulation has been carried out, and a field demonstration of low-cost WDM PON system has been completed.
With the open decoupling of optical networks, the traditional chimney style network management mode of manufacturers is gradually unable to meet the demand. The unified management of multiple manufacturers, direct control of equipment, and management of optical equipment and electrical equipment decoupling business have become necessary attributes for the unified management platform of transmission equipment. First, this paper elaborates on the key technologies for implementing open decoupling of controllers. Then, it introduces the innovative exploration of the controller. Finally, based on practical experience, it analyzes the application of the controller in the current network.
Free-space optical communication refers to a communication technology for laser transmission in free space. Combined with the convenience and mobility of wireless communication, it uses the band and technology of optical fiber communication to solve the transmission problem due to geographical terrain restrictions or temporary communication needs. This paper introduces the characteristics of terrestrial free-space optical communication technology, and provides some commercial applications of this technology.
Information and communication technology is currently experiencing a phase of accelerated integration, systematic innovation and intelligent driving evolution. Based on digital twin technology, the construction of a self-intelligent optical network with self-configuration, self-optimization, and self-repair capabilities has become a research hotspot. This technology aims to achieve intelligence and automation throughout the full life cycle of optical network planning, construction, maintenance, optimization, and operation. This paper comprehensively analyzes the current research status of digital twin technology at home and abroad. It proposes a novel self-intelligent optical communication network architecture, and designs a quantitative representation model for optical network data using high-dimensional space. Additionally, it constructs a complete simulation modeling operations set for digital twin. Aiming at the current optical network operation and maintenance challenges, this paper sorts out three types of digital twin application scenarios. Using the cases of network transmission quality evaluation and autonomous optimization, this paper describes the application effect of digital twin technology, and summarizes and prospects the digital twin technology.
As a breakthrough technology, data trust provides a new way to solve the problem of data security and management. At present, there are two types of data trust models in the world, namely, the information fiduciaries model and the third party trust model. Those two models have different advantages and disadvantages. By learning the advanced experience of data trust, China has also made some attempts to localize data trust, and achieved certain results. On this basis, in the context of promoting marketization of data elements, through the analysis of data authorization, data element circulation, data income distribution, data security and other aspects, this paper discusses how data trust can help to promote marketization of data elements.
The identity resolution system is an essential part of the new infrastructure for industrial internet, and an important part of the future industrial development. However, there is no investigation into the promoting effect of identity resolution system on the development of industry. Based on the output value data of Chongqing’s secondary industry and the operation data of Chongqing’s top-level node for identity resolution, this paper analyzes the promoting effect of identity resolution system in industrial internet on the development of industry. In addition, it further proposes suggestions for the future development of the identity resolution system by using the Pearson correlation coefficient.
The derivatives of radio spectrum resources have spread to many fields of social economy, and the demand for spectrum resources in various industries is increasing rapidly. Spectrum resources are scarce and non-renewable public resources. The current allocation mode of administrative examination and approval in China cannot maximize its use efficiency, and cannot fully reflect its economic value. This paper systematically analyzes the auction model, auction rules and auction process adopted in Poland’s first spectrum auction, and summarizes the inspirations of the experience of Poland’s first spectrum auction to the allocation of spectrum resources in China.
The computing network is gradually emerging, and the network architecture is transforming into “device, edge, and cloud”. Among them, the “edge” is closest to the user, which is an important component of network evolution. Providing edge computing capabilities in broadband optical access network and customer premises network has become one of the key research directions. This paper first introduces the computing deployment location and method for supporting edge computing in broadband optical access network and customer premises network. Then, it discusses the key technologies that support edge computing.
The 5G VoNR+ service, with features such as an open application platform and visualized human-machine interaction, can greatly enhance the user calling experience. This is an important and innovative attempt of telecommunications operators in the field of traditional telecommunication services based on 5G networks. How to bill this innovative service has become a key issue for the successful development of the service. This paper introduces the 5G VoNR+ and provides an analysis of its business characteristics and existing billing modes. In addition, it also gives recommendations for the billing modes at different stages of development for the 5G VoNR+.
First, this paper analyzes the current situation and problems of software cost estimation in the telecommunications industry. Then, it proposes a solution to improve standardization and normalization of software cost estimation by building a case database and a software cost estimation system. It also proposes the key points of building the case database and the framework of software cost estimation system. Finally, it designs a workflow to guide the implementation in engineering practice.