The 5G era really couldn't stop it. Once again, especially the major operators have made corresponding adjustments in network construction. Tang Xiongyan, chief expert of China Unicom Network Technology Research Institute, said. In terms of the development of 5G networks, China Unicom will focus on 5G optical communication, and WDM/OTN will be the mainstream technology in the future. This will be the best solution. In addition, Tang Xiongyan revealed that China Unicom will launch a white paper on 5G bearer network in October. “The white paper is currently in the draft stage and will be officially launched next month.†Tang Xiongyan, Chief Expert of China Unicom Network Technology Research Institute 5G is a major opportunity for network reconfiguration 5G has become the biggest hot spot in the industry. Tang Xiongyan said, "5G is not only a new generation of mobile communication. In fact, 5G is the integration of various IT technology networks, and it is also a major opportunity to realize network reconfiguration. 5G is not only a technological change, but also an industry integration, cross-border expansion. And the network re-constructs new opportunities, and the imagination space is very large in the future." There are two definitions for 5G in the world. One is ubiquitous ubiquitous connectivity and the other is network intelligence. When it comes to the difference between 4G and 5G and 2G to 3G to 4G, Tang Xiongyan believes that there will be a lot of wireless technology innovation and spectrum resource expansion in the 5G era, from low frequency to ultra high frequency. "From a network perspective, the 2G to 3/4G network transformation is from TDM to IP, and the network infrastructure has changed little. 4G to 5G is not the same. Network technology has reached large network cloud, network architecture is the network. The overall architecture is still wireless access architecture, and these changes are revolutionary changes." In addition, as the application develops to the Internet of Everything, the industry is fully expanded and the business model is unprecedented. In addition, the current status of the industry is the Internet industry, OTT dominant, and the carrier's ICT industry is declining. Tang Xiongyan pointed out that for operators, 5G is facing a new technology system and business environment, and there are great opportunities and challenges. Tang Xiongyan pointed out that "the key aspects of the 5G network include several aspects: First, wireless side function reconstruction and cloudization, including CU, DU separation, DU/AAU separation, CU cloudization, and other network slicing, NFV to SDN; It is edge computing, including the core network to be clouded, that is, the separation of UP and DP, and virtualization. There will also be some new content coming in the 5G bearer network, except for the 5G directly related prequel, middle pass, and back pass. The changes in the entire network system will also bring about new changes to the bearer network." In addition, the overall cloud of the network is indirectly related to 5G. "Because the entire network element has to be placed in the data center, the transmission and bearer of the entire cloud network is related to 5G. Because 5G development brings about network changes, introducing new traffic to the network, but it is not the same as the 5G topic. Direct correlation, of course, is very relevant to the transport network, because the transport network needs to adapt to cloud and requires a more flexible bearer system." 5G bearers face five challenges "5G development should be carried first, and bearer must be prepared." Tang Xiongyan pointed out at the meeting that in the future, 5G bearer will face five challenges. Challenge one, 5G uncertainty. Tang Xiongyan said, "The basic architecture of 5G is fixed, but the specific architecture has not been determined. The form of 5G wireless equipment is not certain. Now it is still at the level of equipment development, and there is no certainty. In addition, the construction progress is uncertain, and 5G comes to operate. Where to start doing business, first cover from hot spots, or first low frequency and high frequency, these are not sure. Let's take a look at the market development, how fast the 5G market can get up, there is still a lot of unknown. In this case, the bearer network is part of the 5G and needs to serve the development of the 5G core network. This is the 5G development of wireless and core networks, regardless of the structure, bandwidth, delay, synchronization, etc., are not very clear." Second, the diversity of 5G business scenarios. Tang Xiongyan pointed out that “eMBB, mMTC, and uRLLC have different network requirements. If the application meets all extreme requirements, it will inevitably lead to an increase in transmission bearer costs.†Third, the means of transmission itself is diverse. Tang Xiongyan said, "5G can achieve transmission methods at all levels. It can be transmitted by optical fiber, WDM, OTN, IP, PON, etc. There is no problem in analyzing these advantages and disadvantages, but once it reaches the decision-making moment, it becomes a problem." Fourth, the uncertainty of cost. Tang Xiongyan believes that "cost is very critical for a technology, but the cost is often a change of development. It is not that today's cost is fixed. Some costs are big costs today, and it may take two days to quickly. The decline, including the uncertainty of the cost of optoelectronic devices." Fifth, the difference in the status quo of the network. Tang Xiongyan pointed out: "At present, the status of each operator's network is different, and there are differences in technology bearers." 5G development, "pragmatic" At the meeting, Tang Xiongyan talked about six suggestions for the development of 5G, among which he believed that the most crucial word was “pragmaticâ€. One is demand-driven, and should meet the basic needs of 5G's own development. It is specially treated for special needs. Because of some extreme requirements, some special methods are used to solve it. The second is pragmatic. If there are mature technologies at the present stage, mature industrial chains and existing resources can meet the requirements, then choose some of the techniques and methods stated, the most appropriate means of principle, if network innovations achieve cost reduction and performance improvement. Obvious advantages can be done, otherwise don't consider it. The third is to simplify the network architecture. The infrastructure we hope to be stable is as simple and mature as possible. Fourth, the cost is heavy. Today, operators are still facing cost pressures. 5G construction should also consider the cost of wireless and core networks, and promote the cost reduction of high-frequency devices and optoelectronic devices through technological innovation and industrial scale. Fifth, step by step, 5G construction will not be in one step, so the construction of the transmission network should also be tailored to local conditions, step by step, not blindly ahead of investment. Sixth, the system is open, and openness is the trend of the network. 5G technology also needs room for future technologies. 5G bearer: light-based, WDM/OTN into the mainstream technology direction Although 5G transmission bearer is very important, it is not the bottleneck of 5G development. Optical communication technology can fully meet the requirements of 5G development. The key is how to reduce costs. Based on the demand for large bandwidth, low latency, high-precision synchronization and the consideration of infrastructure resources, network cloud and flexibility, Tang Xiongyan suggested that “light-based, WDM/OTN-based bearer technology It is the best technical solution for 5G bearer." For the 5G prequel, Tang Xiongyan believes that the 25G port rate becomes the basic requirement. The forward-bearing bearer technology is undoubtedly dominated by light. For fiber-optic scenarios, direct fiber-optic drive is used. For low-fiber scenarios, the 25G-based WDM/G.Metro is the best solution. For the prequel, due to the large number of base stations, the cost is an important consideration for the prequel. Tang Xiongyan called for the industry to work together to make the 25G optical module work. For 5G Zhongchuan, Tang Xiongyan mentioned that the bandwidth of the IPRAN device is insufficient, and the dynamic performance of the DU and CU is limited. Therefore, the OTN alone is feasible, especially the OTN of 100G is relatively mature, and the L2 packet function can be realized by using the Pe-OTN. In terms of return, Tang Xiongyan believes that not only the mobile bearer itself but also the fixed-area integrated metro bearer system should be considered, and three layers are needed. OTN should be combined with IP/MPLS/SR/EVPN technology, based on SDN. The IP+Light technology solution is the first choice. In the backhaul network, the bandwidth will reach the order of hundreds of G or even Tb/s, so it is necessary to achieve large bandwidth through OTN. At the same time, network cloudization is the trend of the times. The backhaul will be centralized control of SDN as the backbone, and the ROADM will realize direct hops. At the same time, the flexible scheduling of the network will be realized by combining 1.5/2 layer technologies such as ODUflex, FlexO and FlexE. Finally, Tang Xiongyan pointed out that "optical communication technology advancement can well meet the needs of 5G development, and there are many options for 5G transmission bearers. Therefore, according to local conditions, the most suitable technology is selected according to the needs, so TCU and cost performance are the core elements, so it is necessary to encourage Innovation must also be pragmatic." Vapesoul & Voom series Vape are so convenient, portable, and small volume, you just need to take them Vapesoul & Voom Vape Disposable Vape Pen E-cigarette Fruit Flavor Series Ningbo Autrends International Trade Co.,Ltd. , https://www.vapee-cigarettes.com
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