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Introduction to 5G 

5G is the next wireless technology advancement, which aims to deliver faster internet speed and a more reliable connection. 5G allows customers to download their favorite contents and media in seconds. 5G is the next-generation wireless connectivity technology. It is designed to meet the ever-growing demand for mobile data as well as new services and applications that rely on low latency, high bandwidths, and ultra-reliability. A wireless network with 5G uses a wider range of spectrum bands, which significantly boosts the amount of information that can be transmitted through each area. With this increased capacity, 5G will allow the delivery of even more video content with ultra-high video quality, enable new cloud gaming experiences or support enhanced 4K video conferencing. 

5G is the latest technology standard for wireless communications, with improvements in both spectral efficiencies (bits per second per Hertz) and total data rate (bit/second). 5G was originally conceived to provide connectivity to the Internet of Things devices, remote sensing applications, and mobile computing but has recently been expanded to include enhanced mobile broadband for consumers. 5G is an all-inclusive term that includes high throughput, massive connectivity, and ultra-low latency. That said, the specific work to achieve these characteristics will comprise two primary areas: Resilient Communication (RC) and Reliable Communication (RC). And while the RC technologies are important and fundamental to 5G in general, Reliable Communications (RC) technology has been specifically selected as a critical component of 5G evolution due to its direct impact on Network Slicing and multi-access edge computing. The most important technological development for the telecom sector of the last several decades, 5G will offer users the ability to transfer large amounts of data very quickly.

 This will enable a host of innovations to mobile phones and other wireless devices that we can’t envision today. 5G will bring with it exciting new capabilities including ultra-reliable and mission-critical services, massive machine-type communications (m MTC), massive connectivity for low latency use cases such as smart city services, and high throughput streaming video and other interactive applications. 5G will be designed to provide 1000x improvements in throughput, lower latency, and significantly enhanced spectral efficiency

5G call flows 

The 5G call flows allow the user's device to detect a nearby cell (uplink and downlink). A client can choose the best cell for establishing an air interface connection based on its position. 5G call flows have the same standardized packetized formats as previous LTE and 4G systems. Therefore, existing LTE and 4G devices will be able to operate seamlessly on 5G networks in addition to the new features and services that 5G is expected to offer. However, only a few of those features will be supported by all 5G devices due to differences in capabilities (e.g., uplink control channel introduction). 5G call flows are the interactions between the end user(s) and their wireless service provider to establish, release and modify a communication session over a 5G wireless network. 

The 5G standard will not address all the necessary elements of a complete system and will rely on a wide variety of as-yet-to-be defined interfaces. One important element of this interface set is the interface between network elements, which will provide the underlying connectivity for all services. The usage model for these interfaces cannot be determined before 5G is fully specified, but it will almost certainly involve very large numbers of parallel connections. 5G to support the high quality video, over-the-air broadcast, and Virtual Reality applications. 5G will focus on a wide range of bandwidths, latency performance, mobility, and spectrum efficiency. The core network and service architecture for a NFV-based 5G network should be flexible and evolveable to accommodate new services

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