As the first "new infrastructure", 5G is the most fundamental communication infrastructure in the "new infrastructure". However, in the tide of 5G network construction, base station construction also faces many pain points.

A few days ago, in the live broadcast of "V-LoGeek 100 Lessons" of Vertiv Technology (VerTIv, NYSE: VRT), through "Visit 5G C-RAN Computer Room on the Cloud", I visited Nanjing Unicom's 5G Smart Computer Room from a distance, and introduced in detail the The successful practice of Nanjing Unicom to solve the problem of 5G base station construction in one package. At the same time, Wang Anlin, an expert of VerTIv China Telecom Solutions Department, Ma Yuehua, head of infrastructure construction of Nanjing Unicom Network Department, and Rui Huaping, head of 5G sharing and co-construction of Nanjing Unicom Wireless Department, combined with the development of 5G network and actual needs, It comprehensively analyzes the hot issues of 5G base station construction.

5G BBU centralized computer room construction faces "three highs" pain points

Rui Huaping introduced that compared with 4G, 5G network has faster Internet access rate, lower latency, and can achieve multiple connections at the same time. However, due to the relatively high frequency spectrum, 5G needs to deploy more base stations and the sites are denser. Intensive deployment of base stations is a big problem for site selection, so it is necessary to adopt the centralized deployment of BBU, which can not only reduce the investment in the equipment room, but also achieve rapid deployment.

It should be noted that the centralized deployment of BBU will also encounter many difficulties and pain points in actual construction. Ma Yuehua emphasized that the 5G wireless network adopts the construction mode of BBU centralized and AAU remote, which puts forward higher requirements for the convergence equipment room and integrated service access equipment room. High energy consumption. Therefore, how to realize the security and stability of the power system in the computer room, energy saving and environmental protection, and energy consumption optimization after BBU concentration, as well as how to deploy quickly and operate more intelligently, these are the key issues that need to be considered in the construction of 5G base stations.

Nanjing Unicom's 5G BBU centralized computer room located in Xianlin Street, Qixia District, Nanjing City, gathers the BBU centralized points of 5G base stations in the entire Xianlin area. More than 30 BBUs are deployed and equipped with corresponding transmission equipment, and the network covers surrounding universities. and business community. Nanjing Unicom's 5G BBU centralized computer room encountered obvious "three highs" problems during the construction.

In the live broadcast, it was found that a centralized cabinet originally built in Nanjing Unicom's 5G BBU centralized computer room had no cabinet door. This was due to the high temperature of the BBU at that time, resulting in poor heat dissipation, so all the cabinet doors were removed. In fact, the BBU equipment adopts a special air inlet and outlet method of left in and right out, and the air outlet blowing against the door panel can easily cause overheating. In the live broadcast, a temperature test was performed on the door panel of one of the BBU centralized cabinets. The temperature of the door panel reached about 42 degrees, and the temperature of the air outlet reached about 45 degrees.

Ma Yuehua said that if this kind of situation is easy to cause local overheating in summer, it will lead to downtime or paralysis of the computer room. In response to this pain point, Nanjing Unicom has also taken many measures, such as increasing air convection circulation through blowers to cool down, and even using ice cubes to cool down in summer. However, these measures can only cure the symptoms and not the root cause. Not only that, but with the development of 5G networks, the density of BBUs will be higher and higher. In this regard, provincial and municipal companies are required to formulate a unified response plan.

The all-in-one solution brings significant benefits in multiple dimensions

It is worth mentioning that Nanjing Unicom conducted pilot work in this summer using the integrated VerTIv eBase2.0 smart cabinet solution provided by Vertiv Technology (VerTIv). In the live broadcast, the practical application effect of this solution was verified. Practical applications have proved that by using eBase2.0 smart cabinets, Nanjing Unicom's 5G BBU pilot computer room not only solved the problem of local overheating, but also brought great benefits at other levels.

Ma Yuehua introduced in the live broadcast that the eBase2.0 smart cabinet greatly improves the operating environment of the BBU equipment while achieving rapid deployment. The design fully conforms to the principle of the BBU's own heat dissipation, effectively isolating the hot and cold air ducts. It is also based on this research and design that the eBase2.0 smart cabinet can effectively solve local overheating. The cabinet is equipped with two air conditioners according to 1+1 redundancy backup. pool. The cold air and cooling capacity enter the left air inlet side of the BBU through the dedicated air inlet, and the right air outlet side is discharged to the back of the cabinet through sealing, and then returns to the air return port of the air conditioner.

A problem worthy of attention is that when the civil construction of the 5G BBU centralized computer room is completed, the construction of its key infrastructure generally takes about ten days. The eBase2.0 smart cabinet is based on a modular design and integrates switching power supply, battery, monitoring, air conditioning and other systems. It can complete high-quality rapid deployment in just 2 hours, helping the construction of 5G equipment rooms to save time and time. . At the same time, this solution has good scalability, and the cabinet deployment can be configured on demand, flexibly meeting the deployment requirements of 5 BBUs, 15 BBUs, and 25 BBUs.

In the live broadcast, Wang Anlin answered the question about whether the backup battery of the eBase2.0 smart cabinet can be externally installed. The eBase2.0 intelligent cabinet is equipped with 48-volt lithium iron batteries. If the lead-acid battery in the existing equipment room is sufficient, there is no need to configure a backup battery, and it also supports external devices, which greatly improves the use efficiency of a single cabinet and can be placed in More BBUs. In addition, in terms of monitoring and management, the eBase2.0 smart cabinet can realize centralized management and control, and can be equipped with a display screen, so that you can know the operating status of the system at any time without opening the cabinet door.

In the live broadcast, Ma Yuehua specifically mentioned the important role of communication power in the communication network. He said that communication operators require safer, more stable, more efficient and more energy-saving communication power supplies, and at the same time require a more scientific and reasonable layout of the power supply system, as well as a certain degree of scalability, which is convenient for later equipment expansion and maintenance, and To have intelligent and rapid deployment.

In fact, the eBase2.0 smart cabinet has excellent performance in practical applications, and can fully meet the strict requirements for power supply in the construction of 5G BBU centralized computer room. At the same time, the eBase 2.0 intelligent cabinet supports the use of the old, and can use the original power supply and battery system, which can minimize the construction cost.

It is worth affirming that, as the first batch of 5G important node equipment in the industry, the eBase2.0 smart cabinet provides a new model for the centralized construction of 5G base station BBU by virtue of its innovative design in key dimensions such as engineering, power supply, cooling, and monitoring. It can bring extraordinary value experience to operators at multiple levels.

Responsible editor: gt

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