The improvement of 5g Technology Updatetime:2019-11-29 17:10:46
The improvement of 5g communication performance does not depend on a single technology, but requires a variety of technologies to cooperate with each other. The key technologies are divided into wireless transmission technology and network technology.
 
1) wireless transmission technology:
Large scale MIMO technology: base station uses tens of hundreds of antennas, with narrow beam, directional transmission, high gain, anti-interference, and improved spectrum efficiency;
 
• non orthogonal multiple access technology: non orthogonal multiple access technology such as noma, Musa, PDMA, SCMA, etc., further improves the system capacity. Support uplink non scheduled transmission, reduce air port delay, and adapt to low delay requirements;
 
• full duplex communication technology: it is a physical layer technology that realizes simultaneous two-way transmission of information at the same frequency through multiple interference elimination, and is expected to increase the wireless network capacity by multiple times;
 
New modulation technology: filter bank orthogonal frequency division multiplexing, which supports flexible parameter configuration, configuring different carrier intervals according to needs, and adapting simultaneous interpreting of different transmission scenarios.
 
New coding technology: LDPC code and polar code, high error correction performance;
 
High order modulation technology: 1024qam modulation to improve the spectral efficiency.
 
2) network technology:
 
• network slicing technology: Based on nfv and SDN technology, network resources are virtualized to provide resources for different business packages of different users, optimize end-to-end service experience, and have better security isolation characteristics.
 
• edge computing technology: provide telecommunication level computing and storage resources at the edge of the network, localize the service processing, reduce the compliance of the return link, and reduce the service transmission delay.
 
Service oriented network architecture: 5g core network is built with service-oriented architecture, with smaller resource granularity, which is more suitable for virtualization. At the same time, the definition of service-based interface is more open and easy to integrate more businesses.
 
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