On the occasion of CIOE2019, the leading optical communication Chinese media optical fiber online and affiliated chord industry research center officially released the “5G pre-transmission equipment and optical module product development and innovation” white paper.Since the birth of 5G, it has attracted a lot of attention. Because it will bring huge economic benefits, the competition around the world is becoming increasingly fierce. The world is rushing to the future of 5G with unprecedented speed and passion.In Korea, which is the first to commercialize 5G, the performance and stock price of related optical modules and device companies have soared. Because of this, the global optical communications industry has placed great hopes on the deployment of 5G. However, from the early planning and commercial deployment of 5G, especially in the practice of South Korea, there are still many areas that are not completely clear about the demand for 5G pre-transmission.Major domestic operators have also proposed various 5G pre-transmission plans. These solutions are either for the purpose of “renewing” existing products (such as PON and OTN), or one-sided pursuit of a certain indicator and ignoring the high sensitivity to cost (such as colorless and tunable) Capability), or simply ignore the essential difference between the innocent and the backhaul, and put back the technical students in the pre-transmission network (such as SPN and IPRAN).The purpose of this white paper is to show the relevant equipment and module manufacturers. This white paper analyzes in detail the essential characteristics of the new requirements of the preamble network: the 25Gbit/s eCPRI preamble interface is the result of 5G RAN function segmentation, which is the unique requirement inside the preamble network, and it does not transmit large capacity pressure to the middle/backhaul. Point-to-point transparent direct connection is the most efficient implementation of dense connections required for 5G AAU dense deployment; point-to-point transparent direct connection is an inevitable requirement for ultra-low latency, DU coordination, and CU cloud development.
This white paper details the working principles of various industry-recognized potential technical solutions that can be used in the pre-transmission network, and comprehensively analyzes and compares their advantages and disadvantages, and clearly proposes three directional choices:
The 25Gbit/s pre-transmission granularity and transparent direct connection requirements make the sub-wavelength multiplexing convergence capability of the OTN electrical layer redundant. The 100G OTN line interface can only access 4 channels of 25Gbit/s signals. Therefore, the OTN equipment is used in the pre-transmission network. It’s not worth the candle.
WDM-PON’s colorless optical module and adaptive wavelength technology can’t avoid the technical barriers and cost pressure of wavelength tunability. The TDM function of the discarded WDM-PON only uses the ODN function and is no different from the passive WDM solution, so it does not have Practical value.
In contrast, WDM technology is an example of efficient matching of large-granularity technology, simple deployment, mature industrial chain and easy implementation. Therefore, WDM technology is the best choice for the front transmission network to overcome the shortage of fiber resources at low cost.
This white paper aims to reduce the deployment cost of the pre-network and save the fiber usage. With the goal of “efficient matching, large-scale, easy-to-deploy, easy to implement, and easy to implement”, this white paper proposes high-speed optical module products and WDM pre-transmission equipment. Many valuable R&D innovation directions are worth reading carefully by all relevant equipment and module manufacturers.
The best way to predict the future is to create the future. This white paper will clear the technical fog for you, clarify the research and development direction of optical modules and pre-transmission equipment, focus on the main channel of the pre-transmission network transmission products, and effectively support the 5G commercial deployment and pre-transmission network construction.
This white paper is written by the invited senior 5G and optical communication experts. It is aimed at the R&D and sales department of all optical communication equipment and optical module product developers, and the relevant personnel of the strategic decision-making department. They understand the 5G related optical communication requirements and determine the 5G related optical communication products. R & D direction, clarify the necessary information about the relevant misunderstanding.