Views: 90 Author: Site Editor Publish Time: 2020-02-18 Origin: Site
In recent years, the fifth generation mobile communication system has become a hot topic in the communication industry and academia. There are two main drivers for the development of 5G. On the one hand, the fourth-generation mobile communication system, which is represented by long-term evolution technology, has been fully commercialized, and the discussion of 5G has been put on the agenda. On the other hand, the demand for mobile data has exploded, and the existing mobile communication system is unable to meet the future needs, so it is urgent to develop a new generation of 5G system.
The development of 5G also comes from the growing demand for mobile data. With the development of mobile Internet, more and more devices are connected to mobile networks, and new services and applications are emerging. By 2020, the capacity of mobile communication network is expected to increase by 1000 times in the current network capacity. The explosion of mobile data traffic will bring severe challenges to the network.
Firstly, current capacity is unable to support the growth of thousands of times traffic, network energy consumption and bit cost are unbearable. Secondly, traffic growth will inevitably lead to further demand for spectrum, which is scarce, large-span, and fragmented distribution, so it is difficult to make full use of spectrum. In addition, in order to improve network capacity, it is necessary to intelligently and efficiently utilize network resources, such as intelligent optimization for business and user personality. Finally, the future network must be a heterogeneous mobile network with multiple networks coexisting. To improve network capacity, it is necessary to solve the problem of efficiently managing each network, simplifying interoperability, and enhancing user experience. In order to solve the above challenges and meet the growing demand for mobile traffic, it is urgent to develop a new generation of 5G mobile communication networks.
Like the early 2G, 3G and 4G mobile networks, 5G networks are digital cellular networks as well, in which the service areas covered by suppliers are divided into many small geographic areas called cellular. The analog signals representing the sound and image are digitized in the handset, converted by the analog to digital converter and transmitted as a bit stream. All 5G wireless devices in the cellular communicate with local antenna arrays and low power automatic transceivers (transmitters and receivers) in the cellular via radio waves. The transceiver allocates channels from a common frequency pool that can be reused in geographically separated cellulars. The local antenna is connected to the telephone network and the Internet via a high bandwidth fiber or wireless backhaul connection. Just as mobile phones, when a user traverses from one cellular to another, their mobile device automatically switches to the antenna in the new cellular.
The main advantage of 5G networks is that the data transmission rate is much higher than the previous cellular network, up to 10Gbit/s, which is faster than the current wired Internet and 100 times faster than the previous 4G LTE cellular network. Another advantage is lower network latency (faster response time), less than 1 millisecond, and 4G is 30-70 milliseconds. Due to faster data transmission, 5G networks will not only serve mobile phones, but will also become a general home and office network provider, competing with cable network providers. Previous cellular networks provided low data rate Internet access for mobile phones, but a cell phone tower could not economically provide enough bandwidth as a general Internet provider for home computers.
Heat dissipation is a problem that must be overcome when smart phones are running normally. In the era of 5G, this problem is even more serious. For example, in terms of power consumption, the function of 5G handset is more powerful than 4G, data processing speed is faster, power consumption is more, heat consumption increases rapidly, and mobile phone will face greater heat dissipation pressure. With the increase of 5G antennas and the weakening of electromagnetic wave penetration ability, the fuselage material evolves to non-metallic, which requires additional cooling system design. At the same time, the internal structure design of 5G mobile phone is more compact, and it also increases the difficulty of heatpipe solution. In order to help electronic products heat dissipation efficiently and maintain the smooth operation of electronic products, it is very important to choose a good heatsink, such as copper tube heat sink, round extruded aluminum heatsink, round extruded aluminum heatsink, skived fin heat sink, VC heatsinks and so on.
