What is TMSI in mobile communication?

Temporary Mobile Subscriber Identities (TMSI) is allocated to mobile subscribers by VLRs, SGSNs, and MME in order to support the subscriber identity confidentiality. The VLR, SGSN, and MME must be capable of correlating an allocated TMSI with the IMSI of the MS to which it is allocated.

What is S TMSI and M TMSI?

The M-TMSI is a 32-digit binary number that is part of the GUTI and exclusively used in the E-UTRAN. The S-TMSI consists of the Mobility Management Entity Code (MMEC) and M-TMSI. Indeed, it is just a shorter variant of the GUTI.

What is P-TMSI LTE?

The P-TMSI is a temporary identity issued to a GPRS enabled mobile, unique within a given RA (Routing Area), and is used by the GPRS network to page the specified mobile. The P-TMSI is comprised of 32bits and is associated with the TLLI (Temporary Logical Link Identifier).

What is Lmsi in GSM?

The Local Mobile Station Identity (LMSI) is a temporarily identification that can be assigned to a mobile station that visits another network than its home network. This supplementary LMSI may be assigned in the case where the roaming telephone number (MSRN) is allocated on a call-by-call basis.

What is TMSI in GSM identifiers?

Temporary Mobile Subscriber Identity (TMSI) This is stored on the network side only in the VLR and is not passed to the Home Location Register (HLR). Together with the current location area, the TMSI identifies a subscriber uniquely. It can contain up to 4 × 8 bits.

How is TMSI generated?

The actual conversations are encrypted using a temporary, randomly generated ciphering key (Kc). The Mobile Station (MS) identifies itself by means of the Temporary Mobile Subscriber Identity (TMSI), which is issued by the network and may be changed periodically for additional security[2].

What is 5G S TMSI?

The 5G S-TMSI is a shortened version of the 5G-GUTI, designed to facilitate efficiency in radio signalling procedures such as Paging and Service Request. The 5G-S-TMSI is comprised of the AMF Set ID, AMF Pointer and 5G-TMSI.

What is P TMSI signature?

The ‘P-TMSI signature’ is used for authentication purposes on the SGSN.

Why are the IMSI TMSI and IMEI used in a GSM?

The TMSI identifier is assigned by VLR entity after GSM mobile station establishes communication with the GSM network(i.e. Base station or BTS). The network then uses TMSI instead of IMSI during call processing and call management tasks. This identifier is shorter compare to IMSI number.

Where is TMSI stored?

TMSI is described in 3GPP TS 23.003 Section 2.4, which states that “The network shall not allocate a TMSI with all 32 bits equal to 1 (this is because the TMSI must be stored in the SIM, and the SIM uses 4 octets with all bits equal to 1 to indicate that no valid TMSI is available).”

What is TMSI in 5G?

The 5G-TMSI is generated by the AMF during the generation of the subscriber’s 5G-GUTI. The 5G-TMSI uniquely identifies the UE within the AMF, across all allocated 5G-GUTIs.

What is Suci and SUPI in 5G?

This concealed SUPI is known as SUCI (Subscription Concealed Identifier ) 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.

Is SUPI same as IMSI?

While in previous network generations, this ID is referred to as the IMSI (International Mobile Subscriber Identity), it has been renamed to SUPI (Subscription Permanent Identity) in 5G. Under normal circumstances, even 2G, 3G and 4G conceal the user’s identity with a temporary ID that changes frequently.

Is MSISDN same as IMEI number?

IMEI is a 15 digit number assigned to every cellular device for each of its SIM slots; IMSI is a 15 digit number assigned to the SIM of a mobile subscriber; ICCID is a number that identifies the chip of each SIM card; MSISDN is the full mobile number including the country code and any prefixes.

What is SUPI and Suci?

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)

What is Suci in SIM?

If used, a public key connected to a mobile network operator is used as an input to an encryption algorithm to conceal, i.e. encrypt the IMSI/SUPI. The result is referred to as the SUCI (the Subscription Concealed Identifier). From a conceptual point of view, this is very similar to how web pages are encrypted.

Is MSISDN mobile number?

MSISDN (pronounced as /’em es ai es di en/ or MISS-den) is a number uniquely identifying a subscription in a Global System for Mobile communications or a Universal Mobile Telecommunications System mobile network. It is the mapping of the telephone number to the subscriber identity module in a mobile or cellular phone.

What is Suci and SUPI?