5G Identities :Globally Unique Temporary UE Identity (5G-GUTI)

The AMF shall allocate a 5G Globally Unique Temporary Identifier (5G-GUTI) to the UE that is common to both 3GPP and non-3GPP access. It is possible to use the same 5G-GUTI for accessing 3GPP access and non-3GPP access security context within the AMF for the given UE.

An AMF may re-assign a new 5G-GUTI to the UE at any time. The AMF provides a new 5G-GUTI to the UE under the specific conditions.

The 5G-GUTI has two main components:

– one that identifies the AMF(s) which allocated the 5G-GUTI; and

– one that uniquely identifies the UE within the AMF(s) that allocated the 5G-GUTI.

Within the AMF(s), the mobile is identified by the 5G-TMSI.  The Globally Unique AMF Identifier (GUAMI) is constructed from the MCC, MNC and AMF Identifier (AMFI).

The AMFI is constructed from an AMF Region ID, an AMF Set ID and an AMF Pointer. The AMF Region ID identifies the region, the AMF Set ID uniquely identifies the AMF Set within the AMF Region, and the AMF Pointer identifies one or more AMFs within the AMF Set.

When the UE is assigned a 5G-GUTI with an AMF Pointer value used by more than one AMF, the AMFs need to ensure that the 5G-TMSI value used within the assigned 5G-GUTI is not already in use within the AMF’s sharing that pointer value.

The 5G-GUTI is constructed from the GUAMI and the 5G-TMSI. For paging purposes, the mobile is paged with the 5G-S-TMSI. The 5G-S-TMSI is constructed from the AMF Set ID, the AMF Pointer and the 5G-TMSI.

The operator shall need to ensure that the combination of the AMF Set ID and AMF Pointer is unique within the AMF Region and, if overlapping AMF Regions are in use, unique within the area of overlapping AMF Regions.

The 5G-GUTI is used to support subscriber identity confidentiality, and, in the shortened 5G-S-TMSI form, to enable more efficient radio signalling procedures (e.g. paging and Service Request).

Watch this video to learn it

5G Identifier SUPI and SUCI

Subscription Permanent Identifier (SUPI)

A SUPI is a 5G globally unique Subscription Permanent Identifier (SUPI) allocated to each subscriber and defined in 3GPP specification TS 23.501. The SUPI value is provisioned in USIM and UDM/UDR function in 5G Core.

Subscription Concealed Identifier (SUCI)

Subscription Concealed Identier (SUCI) is a privacy preserving identifier containing the concealed SUPI. The UE generates a SUCI using a protection scheme with the public key of the Home Network that id securely provisioned to the USIM during the USIM registration. Solution to IMSI catcher In 2G , 3G and 4G network , UE shares IMSI in plain text while initial registration. There is risk that someone can catch IMSI on radio and misuse it. But in 5G During Initial registration of UE, SUCI is used for security pupose in 5G system. This has soved the issue of IMSI catcher in 5G.

Open RAN Architecture

Dear Friends

Thanks for watching 5G sessions on my you tube channel. 

Now I have recorded series of sessions on Open RAN. Part 3   In part 1 I have covered basic concepts of Traditional RAN, Virtual RAN and Open RAN. In Part 2 , I have covered CRAN or Centralised RAN / Cloud RAN / BBU Hotel.

In part 3 , I have  covered 5G NR RAN Architecture and how its parts are disaggregated to make it enable for open RAN. Part 4 is about CIPRI and eCIPRI interface

Part 5 is about open RAN Architecture , open RAN Software and inter operability of different RAN components by different vendors.

Hope you would like it.

Please like and share with your friends. You may subscribe to this channel to get notification when I upload next session on the series.

https://www.youtube.com/playlist?list=PLupYZ2gCg55HD8sY0Ktk9VdvcpWY56HG1

Ashok Kumar

Network Functions Virtualisation in 5G

Dear Friends I am back with a new video on NFV. Network Function Virtuslisation. In this concept, telecom network Functions like AMF PCF, SMF in 5G network are softwarised and deployed on virtual Machines or Containers. The concept can well be applied to earlier generations of telecom Network. I have tried to cover the topic in a super simple way in total of 18 Slides. I request all of you to please find time to go through it once. Please help me by subscribing my channel, sharing in other groups and on social media channels of yours.

Ashok Kumar

ITS 93

MOTI 92

DIRECTOR NTIPRIT, DOT

5G in 5 minutes

If you do not have time but want to learn 5G, this video is for you. This video explains 5G in 5 minutes.

If you get interested in any of the dub topics covered you can always refer to other videos on my channel.

Please encourage me to do more such video by subscribing to the channel and sharing with your friends, on social media and on other whatsapp groups.

Mobile Communication evolution from 1G to 5G

Do you know, when mobile communication started. How it then evolved from 1st Generation of mobile communication to next generation of mobile communication and now 5th Generation.

This video answers all these questions and explains evolution of network architecture from 1G to 5G.

You may write to me if you want me to make video on a perticular technology.

In case your friends or near and dear ones are interested in technology/ telecom area, do share it with them.

I also request you to subscribe and like the channel .

Quality of Service in 5G System / Network

I have recorded my session on Quality of Service in 5G Network/System.

The 5G Systems are supposed to offer different quality of services for different usage scenarios like eMBB, URLLC and mMTC.

The session is focused on establishing PDU session for an UE and various QOS flows like GBR, NGBR RQOS etc which is established to support various services.

As video covers all aspects of 5G QOS, it’s duration is bit longer. But if you have less time to spare, first 10 minutes will give you enough idea about it.

Please do subscribe to the channel, like and share with your friends. I am sharing the youtube link.

Unblocking Blockchain

Rahul is an Author of the book “Unblocking Blockchain: Enabling your digital future” . The Expected Publication is scheduled in Dec 2020) 

On my request, he agreed to take an interactive session for 2018 batch of 15  Indian Telecom Service Officers on 27th August 2020 , 8 PM IST. Here is a link having brief detail of these officers

http://ntiprit.gov.in/probationers/its2018/index.html

His session on blockChain, perticularly the business strategy part of it was brilliant. The one hour session lasted for one and Half hour.

Rahul is always looking forward for connecting with brilliant #Blockchain minds…If you are also  on a Blockchain journey? Connect with him… Only sky is the limit where Blockchain can take us in future!!

#emergingtech #innovation

You can hear him talking about his book at this link

https://bit.ly/UnblockingBlockchainDM

I encourage all of you to become a beta reader of the book on the above link.

Thanks Rahul Again for your time.