Resumen
Currently, there is a fundamental change in the telecommunications paradigm - the transition from traditional circuit switching networks to new multi-service networks, which are based on the principles of packet switching. Previously, there were separate networks for each type of communication (voice exchange services, documentary telecommunication services, and multimedia services), while the free resources of one network could not be used by another network. A multiservice network allows using a single information and telecommunications structure that supports all types of traffic (data, voice, video). The mobile networks are the fastest growing. The newest direction is the 5th generation 5G network. These networks are built according to the methodology of network functions virtualization NFV, based on the transfer of hardware functions to universal computing facilities. Then, on their basis, many virtual parallel networks are organized, which has an analogy with the presence of several parallel networks in the era of circuit switching.The article has a learning goal. It describes how network functions are virtualized, outlines the basics of 5G networks, describes the network slicing schemes, which ensures the organization of parallel networks, and shows how QoS quality is ensured. Examples of the implementation of the latest networks for emergency services are given