Laser wireless power supply opens the door to a new world
According to the official news brief of Ericsson, during this demonstration, the two parties successfully activated a completely "powerless" state through the laser technology of PowerLight Technologies without receiving electricity from the street grid and not involving on-site power generation. The Ericsson Streetmacro 6701 5G millimeter wave base station has realized the transmission of 480 watts of energy within a distance of 300 meters (985 feet). The system is mainly composed of two components, including a transmitter and a receiver. The electricity at one end of the transmitter is used to generate a powerful light beam and send it to the receiver.The receiver uses a dedicated photovoltaic array to capture it, which in turn converts the incoming photons into electrical energy, which can be Power supply for any device. Kevin Zvokel, head of Ericsson's North American network, said that the laser beam wireless power supply solution can safely transmit power over long distances without connecting to the grid, eliminating the obstacles caused by the selection of battery sites during the network construction process. It saves deployment time and improves flexibility. Claes Olsson, executive chairman of PowerLight Technologies, said that most people know that wireless charging technology has been applied to small electronic devices such as mobile phones and watches. However, the demonstrations by Ericsson and PowerLight Technologies are more breakthroughs, and are an important step in the commercialization of secure and wireless power transmission on a larger system scale. And PowerLight Technologies is currently developing a system that can realize the wireless and safe transmission of electric energy within several kilometers in the next few years. This set of wireless transmission by Ericsson and PowerLight Technologies replaces the power supply line, to a certain extent, can help operators quickly open base station sites, especially suitable for the rapid deployment of urban pole stations and micro stations, and can be suitable for emergency communication guarantees or specific time densification Temporary scene of demand. In addition, it can also supply power for various IoT devices such as unmanned AGVs, drones, sensors, etc. conveniently.
5G network construction requires continuous innovation
Just like the evolution process of mobile phones from feature phones to smart phones, as the functions of mobile phones are getting more and more powerful, but the battery technology has not been a breakthrough revolution, various smart phone manufacturers have turned their attention to the innovation of charging technology. . Because no matter how powerful the function and how advanced the hardware is, a smart phone without the support of electrical energy is just a "brick", and the same is true for 5G base stations. As we all know, 5G has three major atomic capabilities, namely eMBB: enhancement MobileBroadband, enhanced mobile broadband; uRLLC: ultraReliable & Low Latency Communication, ultra-high reliability and ultra-low latency communication; mMTC: Massive Machine Type Communication, massive machine type communication to cope with Three application scenarios build a fully connected world where everything is connected. But 5G is so good, it also follows a law of unity of opposites, "no one is perfect", 5G also has a headache shortcomings. First, the problem of expensive cost. It is well-known that operators have huge pressure on the cost of building 5G networks. Simple calculations. According to the previous collection of China Mobile, the price of a single-seat 5G base station was about 160,000 yuan. According to calculations, 5G needs about 10 million base stations to achieve the same coverage effect as 4G, so the total purchase investment of 5G base stations will reach 1.6 trillion, which is an astronomical figure. However, this is only the cost of telecommunications operators to purchase equipment, and does not include electricity, maintenance, labor, and site fees after the network is built. Therefore, reducing the cost of network deployment through a variety of innovative methods has become a task for major operators to sharpen their heads. For example, in the power supply and service transmission of base stations, the traditional solution is for operators to introduce external city power through composite optical cables. The base station optical cable collection projects announced every year are usually tens of millions of core kilometers. How can this money be effectively saved? Secondly, the problem of network deployment efficiency. Regardless of the cost of fiber optic cable procurement and human maintenance, in the process of base station construction, the progress of base station opening is often affected due to the introduction of external electricity or the long transformation period. For example, it is well known that one of the biggest selling points of 5G is its flexible deployment capabilities.It can connect to any IoT device anytime and anywhere through large bandwidth, low latency, and massive links. However, 5G base stations themselves are difficult to achieve flexible deployment anytime and anywhere, because Mobile communication base stations are not only base station equipment, but complete structural components including computer rooms, wires, tower masts, etc., of which power supply equipment is very important, and how to save money in scenarios such as disaster relief, large-scale evening parties, and sports events What about the "last cable"? Therefore, exploring the speed and flexibility of network deployment in different environments is also an important issue that operators need to solve urgently.
Can laser power supply be realized on 5G base stations?
The application of laser wireless power supply technology to 5G base stations is still in the research and development stage, and there is still a certain way to go before landing. However, from the perspective of communication in a broad sense, the expansion of "power from the air" from smart phones to 5G base stations is an important step in the process of power transmission, which will be of great significance for both ordinary users and communication operators. Remember the air charging technology released by Xiaomi at the beginning of this year? Compared with the current mainstream contact wireless charging on the market, this technology truly enables smart phones to "take electricity" wirelessly. In recent days, this "black technology" application has been further expanded-realized in 5G base station power supply, taking a milestone step in the history of 5G base station construction. On October 4th, Ericsson announced the cooperation with the laser innovation company PowerLight Technologies to achieve a proof-of-concept in Seattle and successfully demonstrated the world's first safe 5G base station with a completely wireless power supply method. The power supply method in the solution uses optical beams. -A laser-based technology that converts electricity into high-intensity light, which is then captured by a wireless base station and converted into electrical energy for remote power supply.
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