5G Basic PART III ( Use cases of 5G)

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Hi Guys today we will learn about the use cases of 5G which are proposed by 3GPP.

In responding to the requirements of the services and applications coming up in the near future, the 5G system aims to provide a flexible platform which would enable new business cases and integrate vertical industries, such as automotive, manufacturing, energy, eHealth, and entertainment.

There are three main categories and corresponding use cases for the 5G (5G service type):

1)  Enhanced Mobile Broadband (eMBB):

It is also called Extreme Mobile Broadband.
eMBB supports stable connections with extremely high peak data rates, as well as moderate rates for cell-edge users.
·         Higher capacity – broadband access must be available in areas of high population density, like city centers, office buildings or public venues like stadiums or conference centers’, in both indoors as well as outdoors.
·         Enhanced connectivity – broadband access must be available everywhere in order to provide a consistent user experience.
·         Higher user mobility –mobile broadband services will be enabled in moving vehicles including cars, buses, trains and planes.

Key Requirements:
Peak Data Rate: 20 Gbps
Latency: 1 ms (air interface)
Area Traffic: 10Tbps/Km2
 Indoor/hotspot and enhanced wide-area coverage

2) Ultra Reliable Low Latency Communications (URLLC)

URLLC supports low-latency transmission of small payloads with very high reliability from a limited set of terminals.
It will be used in services for latency-sensitive devices for applications like factory automation, autonomous driving, and remote surgery. These applications require sub-millisecond latency with error rates that are lower than 1 packet loss in 105 packets. ( ITU-R M.2410.0)

This category has stringent requirements such as latency of less than one millisecond and low packet-loss rates of better than one in 10,000 packets. This technology opens a brand new dimension to the application of wireless networks such as tactile Internet, emergency response, collaborative robotics, intelligent transportation, eHealth, drones, and public safety.

URLLC transmissions are also intermittent, but the set of potential URLLC transmitters is much smaller than for mMTC. Supporting intermittent URLLC transmissions requires a combination of scheduling, so as to ensure a certain amount of predictability in the availability of resources and thus support high reliability; as well as random access, in order to avoid too many resources being idle due to the intermittent traffic. 

Due to the low latency requirements, a URLLC transmission has to be localized in time. Diversity, which is critical to achieve high reliability, can hence be achieved only using multiple frequency or spatial resources. The rate of a URLLC transmission has relatively low and the main requirement have ensuring a high reliability level, with a PER typically lower than 10−5, despite the small block lengths.

Key Requirements:
Data Rates: Low to medium (50 kbps to 10 Mbps)
 Latency: < 1 ms air interface
Reliability and Availability: 99.999%
 High mobility

3) Massive Machine Type Communications (mMTC)

mMTC supports a massive number of Internet of Things (IoT) devices, which are only sporadically active and send small data payloads with varying quality of service requirements. 

The objective of this category is to provide very high density of connectivity where a single Base Station can support 10,000 or more devices providing an aggregate connectivity for more than a million devices per square kilometre at the network level. This category offers many applications like smart cities, smart power grids, and smart farms to mention a few.

In contrast, an mMTC device is active intermittently and uses a fixed, typically low, transmission rate in the uplink. A huge number of mMTC devices may be connected to a given ENodeB, but at a given time only an unknown (random) subset of them becomes active and attempts to send their data.

The large number of potentially active mMTC devices makes it infeasible to allocate dedicated resources to individual mMTC devices. Instead, it will be necessary to provide resources that can be shared through random access. The size of the active subset of mMTC devices is a random variable, whose average value measures the mMTC traffic arrival rate. 

The objective in the design of mMTC is to maximize the rate of arrival that can be supported in a given radio resource. The targeted PER of an individual mMTC transmission is u low, e.g. on the order of 10−1.

Key Requirements:
Data Rate: Low (1 to 100 kbps)
Device Density: High (up to 200,000/km2)
Latency: seconds to hours
Low power: up to 15 years battery life


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