4G looks beautiful, but for now, its fundamental voice call quality needs to be strengthened. Recently, some users have reported that it is unclear to use 4G mobile phone calls in some places in Shenzhen Mobile. It is said that at this stage, China Mobile ’s 4G voice often borrows 2G or 3G networks. According to China Mobile ’s research and development progress, VoLTE will be commercialized by the second half of next year Only then can it be reversed.
Users claim that they do not feel 4G high-quality voice calls
4G is known for its network speed, and it is undoubtedly very attractive. Mr. Wang, who lives in a community in Luohu, Shenzhen, is a TD-LTE trial commercial user of a local mobile company. According to the report, 4G is very good in many aspects, such as ultra-fast network speed and 4G The customer service staff is particularly enthusiastic, but the TD-LTE mobile phone used is slow to connect, and often feels slow for a second or two, and the quality of the call is not clear. It is worse than the old 2G mobile phone he used before, and he often drops calls. . For the reasons, Shenzhen Mobile's customer service is also unclear.
Fortunately, Shenzhen is known as the "China's mobile phone capital", and the streets are full of mobile phone companies. Mr. Wang went to Shenzhen Huaqiangbei to find a mobile phone friend to consult about this matter. The friend told him that this is because China Mobile currently uses 4G still has problems in voice technology. When there is no 4G network or the 4G network is not good, the voice needs to fall back to the 2G or 3G network, causing delay and affecting the quality of the call.
These words sound a bit professional, so Mr. Wang is foggy, but in the end, his friend told him that it is best not to rush to use this mobile 4G mobile phone that has been released on the market, because 4G will be in the second half of next year. The mobile phone will be improved, so that you can have a clear voice call quality.
When the 4G signal is not good, it will occupy 3G and 2G networks
No one expected that the quality of voice calls was one of the important technical issues to be solved in the early days of 4G. Relevant information shows that this is because the global 4G operators currently mainly use CSFB technology (a 4G voice solution), which means that 4G voice calls must fall back to 2G or 3G networks.
Generally speaking, when there is no 4G signal or insufficient coverage, 4G voice will fall back to the 3G network. If 3G coverage is insufficient, then 4G voice will fall back to the 2G network.
However, the disadvantage of using this technology is the need to transform the 3G / 2G network, and at the same time put forward higher requirements for 4G network optimization, which will affect the 4G network speed to a certain extent. At the same time, repeatedly switching on 4G, 3G, 2G, in this case, China Mobile's 4G voice may frequently drop calls, which will adversely affect the user's call perception.
Therefore, people worry that China Mobile's 4G may be the same as when China Mobile launched 3G in a certain period of time. At that time, China Mobile's TD-SCDMA was just commercialized. Frequent dropouts let users down and make it difficult to use.
In addition, because the voice technology is not easy to solve, VoLTE will not be available until the second half of next year. China Mobile's current 4G voice call may temporarily affect 2G and 3G networks.
At present, OTT services such as WeChat and QQ services for mobile phones have saturated China Mobile's 2G network, and another 4G voice accounts for a part of the network. The industry is worried that the quality of 4G voice calls will be difficult to guarantee, and even affect China Mobile's 2G. .
These conditions will not change until at least half a year after VoLTE is commercialized. VoLTE will provide high-quality voice calls. It is reported that China Mobile also hopes to realize the commercialization of VoLTE technology as soon as possible. This problem will not exist at that time.
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