You're reading from Mastering 5G Network Design, Implementation, and Operations

Product typeBook

Published inJun 2023

PublisherPackt

ISBN-139781838980108

Edition1st Edition

Concepts

Information Architecture

Authors (3):

Shyam Varan Nath

Ananya Simlai

Oğuzhan Kara

View More author details

5G identifiers

In telecommunication systems, the network operator allocates a SIM card to every device. This SIM card is associated not just with the mobile number but also with a SUPI in the 5GS. It was known as International Mobile Subscriber Identity (IMSI) in the 4G world.

Figure 2.21 – 5G identifiers

The authentication of the UE and the network is based on symmetric keys and is dependent on the identification of the user. However, if the identification is sent in cleartext over the air from the UE to the network, it is susceptible to being imitated by malicious entities, who can pose as legitimate users. To avoid this, mobile networks use several temporary identifiers called Globally Unique Temporary Identifiers (GUTIs).

These identifiers are frequently changed and used for identifying a UE over the air. However, in some situations, like the first user registration, the SUPI is used, and then from thereon, a GUTI is used:

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Mastering 5G Network Design, Implementation, and Operations

Published in: Jun 2023Publisher: PacktISBN-13: 9781838980108

Authors (3)

Shyam Varan Nath

Specialist Leader - AI & Analytics, Deloitte
Read more about Shyam Varan Nath

Ananya Simlai

Ananya Simlai is a Solutions Architect with primary focus on Wireless- 4G-5G Mobility Networks, Cloud Native and NFVI, she is a Trusted Advisor for service providers helping them address their technological challenges thereby enabling them to smoothly transition across technologies like 4G- 5G. She has been a speaker on 5G on international forums and also interacts with CTO teams to design their 5G story. She has published multiple papers on 5G and holds granted patents. She has been instrumental in designing, implementing and successfully rolling out one of the largest 5G mobile networks in the globe. She is currently working as an architect in Google and has previously worked in Vmware, Cisco, Altiostar Networks and Starent Networks.
Read more about Ananya Simlai

Oğuzhan Kara

Oğuzhan Kara is a microelectronics engineer with 12 years of mobile technologies experience including 5G NR, VoLTE, LTE-A, O-RAN, IoT, AI and autonomous systems. He is an expert in Radio Access Network (RAN) design and network optimization. He worked as consultant for different mobile network operators such that AT&T, Partner (f.k.a. Orange in Israel), Hot Mobile, and Yota. In 2021, he founded his own telecommunications consultancy company based in London, UK and he is currently providing 5G consultancy services to Qualcomm and Vodafone.
Read more about Oğuzhan Kara

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