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Identifiers in Communication Net Works
Published in Giovanni Bartolomeo, Tatiana Kováčiková, Identification and Management of Distributed Data: NGN, Content-Centric Networks and the Web, 2016
Giovanni Bartolomeo, Tatiana Kováčiková
In GSM-based PLMNs, the E.164 (ITU 2010) number is often called a Mobile Station ISDN Number (MSISDN) to indicate that the E.164 number is used for mobile services. Another ID used in GSM networks is the International Mobile Subscriber Identity (IMSI), based on ITU-T Recommendation E.212 (ITU-T E.212; ITU 2008). The IMSI provides a unique identifier of the mobile subscription for registration purposes. It is also used to identify the Home Public Land Mobile Network (HPLMN) when the mobile subscriber–terminal is roaming in a Visited Public Land Mobile Network (VPLMN). Most of the present Subscriber Identity Module (SIM) cards used in GSM networks are marked with another ID called the Issuer Identification Number (IIN) according to ITU-T Recommendation E.118 (ITU-T E.118; ITU 2006).
Smart Grid Technologies
Published in Stuart Borlase, Smart Grids, 2017
The first domain of the smart grid network view includes wireless end-point devices or mobile stations (such as electric vehicles) that provide services to smart grid consumers. In 3GPP terminology, mobile devices are termed user equipment or UEs. These mobile devices have a subscriber identity module or SIM that serves as the identity mechanism of the device. The SIM contains preprogrammed identification information such as an International Mobile Station Identifier or IMSI, the SIM key, authentication algorithms, and home short message service (SMS) numbers. The SIM can also store a list of subscriber names, numbers, and received short messages.
Applying Low-Cost Software Radio for Experimental Analysis of LTE Security, Protocol Exploits, and Location Leaks
Published in Georgios Kambourakis, Asaf Shabtai, Constantinos Kolias, Dimitrios Damopoulos, Intrusion Detection and Prevention for Mobile Ecosystems, 2017
A number of identifiers are used in the operation of an LTE mobile network. The most important ones, in the context of this chapter, are the following: IMSI (International Mobile Subscriber Identity): This is a unique identifier for the SIM card in a mobile device. The IMSI is a secret identifier that should be kept private and not transmitted in the clear as it can be used to track devices and other types of exploits [9].TMSI (Temporary Mobile Subscriber Identifier): This is the identifier used to uniquely address a given device instead of the IMSI. Once the device connects to the network for the first time, a TMSI is derived and used thereafter. The TMSI is also refreshed periodically, though not as much as it should [4].MSISDN (Mobile Subscriber ISDN Number): This is the id that identifies the user and owner of a mobile device, that is, the user's phone number. It is mapped to the TMSI in a similar way a url is mapped to an IP address.IMEI (International Mobile Equipment Identifier): It uniquely identifies the hardware (i.e., smartphone) used to connect to the network. It can be thought as the serial number of a mobile device. The IMEI should ideally also be kept secret as, based on its value, one can easily know the type of mobile device the user has (make and model) and well as, in the case of an embedded M2M device, the software version it is running.
NomadicBTS: Evolving cellular communication networks with software-defined radio architecture and open-source technologies
Published in Cogent Engineering, 2018
Emmanuel Adetiba, Victor O. Matthews, Samuel N. John, Segun I. Popoola, Abdultaofeek Abayomi
The SDR software back-end comprises of the Soft Base Station Subsystem (SoftBSS) and the Voice over Internet Protocol Private Automatic Branch Exchange (VoIP PABX) software running on a single-board embedded computer or PC with an Operating System (OS). The SoftBSS provides the necessary interconnection between the SDR front-end hardware and the VoIP PABX. SoftBSS implements a software transceiver which performs functions such as frequency tuning, Gaussian Minimum Shift Keying (GMSK) modulation and demodulation, clock synchronization, control command transaction as well as transmission of receive and transmit bursts. It also implements the Session Initiation Protocol (SIP) mapping functions in order to establish SIP connections for processing by the VoIP PABX. For instance, the International Mobile Subscriber Identity (IMSI) stored on the Subscriber Identity Module (SIM) card of a Mobile Station (MS), which is the end-user phone, is presented to the VoIP PABX as an SIP client. The location of the MS is mapped to SIP registration, call connection is mapped to SIP transactions, while Short Message Services (SMS) function is realized through instant messaging extension to SIP (Apvrille, 2011). The SoftBSS, as shown in Figure 1, also contains a Graphical User Interface (GUI) to provide access for configuring the NomadicBTS by technical administrator in a user-friendly manner. As a proof of concept, the SoftBSS was realized, in this present study, using a combination of open-source technologies such as Ubuntu Linux, OpenBTS and GNU Radio (Burgess & Samra, 2008; Reyes et al., 2016).