In the era of "the machine does not leave your hand", 5G mobile phones have attracted much attention. Since the spring of 2020, 5G commercialization has spread into a prairie trend in the world. For the masses of melons, it is time to experience the same network speed as 5G flying! So the question is: if you buy a 5G phone, what is the theoretical speed you can achieve?
In terms of frequency bandwidth, if we compare a mobile communication network to a highway, the frequency band bandwidth is like the width of a road. The larger the bandwidth, the wider the road. Of course, the more vehicles that can run at the same time, the higher speed. Hongwang Semiconductor learned that the carrier bandwidth of 5G is up to 100MHz in the Sub6G spectrum and 400MHz in the millimeter wave spectrum, which is much larger than the 20MHz bandwidth of 4G. In the most mainstream Sub6G spectrum of 5G, 30KHz subcarrier spacing is generally selected. Since the unit of subcarriers is too small, 5G divides 12 subcarriers into a group, called a resource block (Resource Block, RB for short). With a carrier bandwidth of 100MHz, the guard bands of 1.72MHz on both the left and right sides are removed, and a total of 98.28MHz is obtained, for a total of 273 resource blocks (RB). This is the essence of 5G high speed.
For example, Hongwang Semiconductor, in fact, the speed of 5G is reflected in life, for example, it takes only three seconds to download 1G high-definition movies. A key factor that affects the speed and performance of 5G mobile phones is memory. 5G has higher capacity and faster speed, which requires the processor to complete the large throughput throughput of memory data. For AI-level capabilities such as 4K video transmission, sensor interaction, and smart cars, the efficiency of memory writing and reading directly determines the experience.
In many mobile phone conferences, manufacturers will mention proper terms and parameters like LPDDR3, LPDDR4, LPDDR4x, LPDDR5, etc. These are the entry-level knowledge of mobile phone storage. Hongwang Semiconductor has mentioned before that LPDDR, the full name of Low Power Double Data Rate, is a communication standard developed by the American JEDEC Solid State Technology Association for low-power memory. It has now developed to the latest generation of LPDDR5.
Before LPDDR5 came out, the mainstream flagship mobile phone memory on the market used LPDDR4X and LPDDR4. Because the two often appear at the same time, the names are also very similar, so it is easy to confuse. In fact, LPDDR4X is not the next-generation version of LPDDR4 memory, it can be seen as an optimized version of LPDDR4 power saving.
Compared to LPDDR4, LPDDR4X optimizes memory power consumption and improves memory speed. At present, Hongwang Semiconductor has mass-produced 8GB of LPDDR4X memory, and under the support of large capacity, the storage speed is more advantageous. It plays a very obvious role when running huge games or recording 4K video. The power consumption is lower. Faster and more power efficient.
At the same operating speed, LPDDR5 saves 14% power consumption compared to LPDDR4x. The industry said that LPDDR5 can extend the battery life of mobile phones by 5% to 10%. In addition, LPDDR5 introduces data copy (Data-Copy) and write X (Write-X), which can directly copy the data of a single pin to other pins. Relying on the excellent data transmission rate improvement, the processor can be fully released through high-speed operation It's performance allows it to process data at a faster speed, so as to enter "sleep mode" earlier, without having to work for a long time and under high load.
Because LPDDR5 can complete the data processing and storage in "zero time difference" time, the response is also more calm when running multiple applications such as video, games, screen sharing, etc., which can solve the problem of stuck, black screen and so on. It is expected that by the end of 2020, most mainstream flagship opportunities will be LPDDR5. From 2021 to 2022, you will see that mid-to-high-end 5G smartphones will require LPDDR5. From 2022 to 2023, LPDDR5 will become the mainstream of the market.
Although there are not many processors that can carry LPDDR5, Hongwang Semiconductor will also mass produce LPDDR5 in 2020. I hope Hongwang Semiconductor will bring better storage experience and services to more people in the future. I hope you still have to choose the right one if your conditions permit. The latest is not necessarily the most suitable. After all, the popularity of 5G mobile phones will take some time.