However, just a few months later, the British EE and Vodafone Germany have completed a gigabit LTE test with commercial handsets using the latest Mate 10 Pro from Huawei.
As the industry's first smart phone supporting 4.5G Cat.18, the downlink speeds can reach as high as 1.2Gbps and support dual-card dual-mode VoLTEs. How do you view Huawei Mate 10's communication capabilities?
Cat.18 first look at what is it?
As shown above, the Mate 10 Pro is the first handset to support Cat. 18 with Cat. 18 downlink support, Cat. 13 uplink support, and up to 1.2 Gbps downstream. The Mate 10 also supports Cat. 16, Up to 1Gbps.
In the past, most commercial phones supported Cat.4, Cat.6, Cat.12 and Cat.13, and the latest released models of the same level: Samsung Galaxy Note8 and S8 support Cat.16 and the maximum downlink rate is 1Gbps; iPhone X is not open Its communication capabilities, according to disassembly analysis, some of its baseband chip models support Cat.16, but does not support 4 * 4 MIMO, the maximum download rate will be greatly reduced.
Huawei, which has been cultivating communications, has maintained its leading position.
Explain the UE Category, which defines the different categories of terminals, that is, the hardware capabilities of the handset When the handset establishes communication with the base station, the base station sends a query message to the handset requesting the handset to report its hardware capabilities. After the handset receives this message , To report the capacity-related information, the base station weigh the phone in the end a few brushes, and then decide how much to allocate resources to it.
For example, the base station supports multiple antennas to send, but the mobile phone only has a single antenna, and the MIMO technology can not display it It's
Speaking of MIMO technology, Mate10 Pro supports 4 * 4MIMO, how to understand?
MIMO technology is to use more antennas to send more data, it is deployed in the base station and mobile phone multiple antennas, the transmission data is divided into multiple different data streams, respectively, through the transmission of multiple antennas, which double the data rate.
In 4 * 4 MIMO, 4 represents the number of antennas, so this also means that the Mate10 Pro phone has 4 transmit and receive antennas built in, which supports twice the rate of a conventional 2 * 2 MIMO.
MIMO technology has doubled the network speed, from a certain point of view, this is actually the task of speeding up the network transferred to the phone's signal processing hardware.
The following is a realization of the basic principles of MIMO technology diagram ...
In order to realize MIMO, the sender needs to offload and encode, modulate, and then map the data to different antenna ports for transmission. The opposite process is performed on the receiving end to separate and merge the different data streams to demodulate the original data stream. In addition, a precoding , Channel assessment and more.
In short, it increases the complexity and power of the signal processing hardware, especially for a small handset that is compatible with many functions. The more antennas are supported, the more the RF and the baseband are processed complex.
4 * 4 MIMO technology has become an important evolution of LTE. The base station has an 4T4R antenna (4T4R), but this requires that the mobile side also support 4 * 4 MIMO, in order to really improve the network speed.
What happens if the base station supports 4 * 4 MIMO and your handset only supports 2 * 2 MIMO (that is, with 2 antennas built in)?
As shown above, although the network supports 4 * 4 MIMO, but your phone does not support, in order to double the speed, can only cry.
The introduction of 256 QAM at 4.5G is the highest modulation scheme currently available in LTE Modulation is the process of encoding a digital signal into an analog wireless signal. The higher the QAM level, the more data is contained in each transmitted wireless signal. QAM encodes 8 bits (256 possible values) into a wireless signal, which means that it is twice as fast as 16 QAM and 1.33 times 64 QAM.
For example, we compare mobile communications to a freeway system. Wireless spectrum is the road. Vehicles traveling on the road can be regarded as a group of information bits. Therefore, 64QAM is equivalent to a car and 256QAM is like a coach. MIMO Technology is equivalent to the establishment of a three-dimensional multi-level transportation system in a space-based manner. Obviously, the transport capacity of the road has been significantly increased.
There carrier aggregation, is to speed up the width of the road, such as 5CC is 5 20MHz bandwidth combined into 100MHz, speed up 5 times.
Currently, the introduction of 4 * 4 MIMO, 256 QAM and multi-carrier aggregation technologies have become the mainstream trend of operators worldwide entering the 4.5 era. As early as 2015, Huawei completed cooperation with operators in testing and verifying 4.5G key technologies.
In October 2015, 3GPP formally decided to name the new LTE standard LTE-Advanced Pro, which is the 4.5G standard naming. In November 2015, Huawei and Hong Kong Telecom successfully demonstrated the world's first 1Gbps peak rate. In December, Huawei and TeliaSoner announced the world's first LTE-Advanced Pro (4.5G) mobile network with a peak outdoor rate of 1Gbps, making it the fastest 4.5G network in the world.
Obviously, Huawei, based on its strong technical know-how in the field of communications, has led the terminal industry towards a new era of networks from 4G to 5G with its unique end-to-end capabilities from network to terminal.
As 4G evolves to 5G, traditional 2 / 3G voice services are not only inefficient but also occupy high-quality low-frequency resources. Faced with the spectrum re-tillage for 4G / 5G use, VoLTE has become a general trend.
This time, the Huawei Mate 10 series phones push this trend once again - Dual SIM Dual VoLTE.
Mate 10 series of mobile dual SIM cards support 2G / 3G / 4G, two SIM cards can achieve 4G Internet access and VoLTE calls, providing the main and secondary cards consistent high-definition voice and video calls experience.
All of VoLTE's improved handset call quality, clear and stable voice, short follow-up time, low dropout rate, simultaneous calls and high-speed Internet access, carrier-class end-to-end service support and consistent call coverage quality.
At present, there are more than 100 VoLTE networks in the world. China Mobile has long been a commercial VoLTE and dual-card dual VoLTE is a direction strongly promoted by China Mobile. China Telecom has requested that VoLTE be supported by the networked mobile phones in the second half of 2017. China Unicom is also actively deploying VoLTE commercial .
However, the traditional dual card dual standby mobile phone usually supports 2G / 3G / 4G for one card and 2G / 3G for the other card, and can not support dual-card dual VoLTE. The reason is largely related to the complexity of implementation.
Dual-card dual VoLTE means adding a new set of baseband chips and antennas at a higher cost, as well as technical challenges of power consumption and RF interference. For example, a cell phone is required to constantly monitor the network. An LTE network, time-interleaved way to take time-sharing, back and forth way to monitor, which received some of the hardware performance of mobile phones put forward higher requirements.
Dual SIM dual VoLTE, Huawei Mate 10 series phone full of sincerity.
A few days ago and friends chatting to Huawei Mate 10 series of mobile phones, although the phone in artificial intelligence, full screen, shooting capabilities and other aspects have shown leadership trend, but in the communication circle inevitably talk about its communication capabilities, as this A friend said: Huawei is the birth of this communication, the feelings and pursuit of communication has always been, they understand both the network and understand mobile phones, from the network to the phone's end-to-end understanding, I am afraid that any business can not match of.