• 3 months ago
Video Series 02 : 5G Architecture and Key Principles :
Session 04 : 5G Deployment Options & 5SA vs 5G-NSA Network in brief.

5G deployment is more complex than just a simple upgrade from 4G. In this video, we explore the different 5G deployment options, covering both standalone and non-standalone configurations. Learn how 4G and 5G networks work together, and why they will continue to coexist for years. We’ll explain critical deployment schemes like Option 3 (ENDC) and Option 2, along with how dual connectivity allows seamless transitions between these technologies.

Topics Covered:
* 4G Deployment (Option 1): This is the traditional 4G RAN working with the 4G packet core.
* 5G Standalone Deployment (Option 2): A 5G RAN connected to the 5G core, representing a fully standalone 5G network.
* Non-Standalone 5G Deployment: Learn how 4G and 5G coexist through dual connectivity, where a device connects to both LTE (4G) and NR (5G) at the same time.
* Option 3 (ENDC): When 4G is the primary RAN connected to a 4G core and 5G (NR) is used as the secondary RAN. This allows for leveraging 5G performance in areas where NR coverage is still limited.
* Future Deployment Options: As 5G coverage expands, understand how Option 4 (NE-DC), Option 5 (e-LTE), and Option 7 (NGEN-DC) will provide flexibility for mixed networks.
* Standalone vs Non-Standalone: We clarify the difference between standalone and non-standalone options, highlighting the advantages of each.


Key Takeaways:
* Dual Connectivity: See how dual connectivity allows for seamless communication over two Radio Access Technologies (RATs).
* Non-Standalone 5G (Option 3): Ideal for areas with spotty 5G coverage, where LTE serves as the backbone.
* Future of 5G: Understand how the transition from non-standalone to standalone 5G will unfold as NR coverage becomes more widespread.


If you're interested in 5G technology or a professional in telecom, this video simplifies the complexities of 5G deployment into clear, easy-to-understand explanations.


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Transcript
00:00Hi, in the last session we talked about 5G core and 5G systems and we briefly seen a
00:05comparison of 5G systems and 4G systems and we discussed that how control plane and user
00:11plane separations or CUPS helps 5G technology to serve upcoming demand and new use cases.
00:18Now in this session we will be talking about 5G deployment options.
00:22So the question was that when 5G deployment will start then how the network structures
00:28will look like.
00:29So let's begin with 4G.
00:32In 4G deployment, the radio access network or RAN works with a 4G packet core or EPC
00:38core.
00:39This setup is known as option 1.
00:41Ideally, a 5G deployment would consist of a 5G RAN network which is connected to a 5G
00:47core and this architecture is referred as option 2.
00:51However, the network cannot have that straight transaction from option 1 to option 2.
00:56So in reality, 4G technology and 5G technology will work together in the system and they
01:02will complement each other for a reliable network.
01:05At least for the few years after 5G deployment starts in.
01:09So you also see in present time that 4G and 5G RANs are working together in a setup called
01:15dual connectivity or generally referred as non-standalone network.
01:20In dual connectivity, the user equipment or UE communicates using two radio access technologies
01:25simultaneously.
01:27In dual connectivity, one radio access network technology serves as the master technology
01:31and the other acts like a secondary technology.
01:34And the secondary RAN can either forward the traffic to the primary RAN or it can send
01:39it directly to the core network.
01:41The important note is that the control plane signaling can be only managed through the
01:46primary RAN.
01:47If LTE connected to the 4G core is the primary radio access technology and the new radio
01:53or NR is serving as a secondary radio access technology, then this setup is called ENDC
01:59or option 3.
02:01This configuration is especially useful when NR coverage is spotty.
02:06Wherever NR coverage is available, then the network can utilize NR or 5G performance by
02:12using it as a secondary carrier.
02:14In the later stages of 5G, when NR gets its full coverage or wider coverage than the LTE
02:21coverage, then NR can be used as your primary radio access technology, which will be connected
02:26to the 5G core.
02:28And then the LTE will act as a secondary radio access technology.
02:32Then this setup is known as option 4 or NEDC.
02:37Also in future stages, while some 4G phones are still in use or when 5G UE is in the location
02:44where there is only 4G radio coverage, then LTE could be used as a radio access technology
02:49but with 5G core.
02:51Then this is called option 5 or ELTE.
02:54ELTE is evolved LTE.
02:57That simply means that LTE has been upgraded to support the 5G core interface.
03:03In addition, when LTE is used as a primary radio access technology and NR as a secondary
03:10radio access technology but together with the 5G core, then it is called option 7.
03:16So the options with one single radio access technology like option 2 are called standalone
03:21networks.
03:22And the options with two radio access technologies are called non-standalone networks, most commonly
03:27the option 3.
03:28Okay, so that's it for today.
03:31That was a brief about the 5G deployment options.
03:34In the next session, we will be talking about 5G RAN or 5G radio access networks.
03:39So stay tuned for the updates.
03:40If you did not subscribe till now, then please do subscribe to learn and grow community for
03:44regular updates.
03:46If this video is informative, then please like this video, comment on video and don't
03:50forget to share.

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