What is the purpose of mobile station roaming number?

MSRN is the routing number that identifies the current location of the called MS. MSRN is temporary network identity assigned to a mobile subscriber. MSRN identifies the serving MSC/VLR. MSRN is used for call delivery (calls incoming to an MS).

What are GSM identifiers?

Phone numbers, subscribers, and equipment identifiers are some of the known ones. There are many other identifiers that have been well-defined, which are required for the subscriber’s mobility management and for addressing the remaining network elements.

When TMSI will be used in the GSM network?

The Temporary Mobile Subscriber Identity (TMSI) is a temporary identification number that is used in the GSM network instead of the IMSI to ensure the privacy of the mobile subscriber. The TMSI prohibits tracing of the identity of a mobile subscriber by interception of the traffic on the radio link.

What is Lmsi and TMSI?

The LMSI is a four-octet/byte number. It is a pointer to a database record for a particular IMSI in the Visitor Location Register (VLR) database. The TMSI is used to mask the true subscriber’s identity, which is the IMSI, in NAS signaling procedures. In the E-UTRAN it is often used together with the GUTI.

What is GSM Msrn?

A Mobile Station Roaming Number (MSRN) is an E.164 defined telephone number used to route telephone calls in a mobile network from a GMSC (Gateway Mobile Switching Centre) to the target MSC (see .). It can also be defined as a directory number temporarily assigned to a mobile for a mobile terminated call.

What is GSM architecture?

The GSM architecture consists of three major interconnected subsystems that interact with themselves and with users through certain network interface. The subsystems are Base Station Subsystem (BSS), Network Switching Subsystem (NSS) and Operational Support Subsystem (OSS).

What is M TMSI in LTE?

What is the GUTI? In LTE, the GUTI is the Globally Unique Temporary ID, and identifies the mobile device to the LTE network. By allocating a temporary ID to the device, the MME maintains the security of the IMSI (International Mobile Subscriber Identification) when transmitting over radio interface.

How does a mobile station roaming number work?

As a subscriber may wish to operate outside its “home” system at some time, the VLR can also allocate a Mobile Station Roaming Number (MSRN). This number is assigned from a list of numbers held at the VLR (MSC). The MSRN is then used to route the call to the MSC which controls the base station in the MSs Current location.

How does the GMSC work on a GSM call?

The GMSC identifies the HLR for the subscriber (which is coded in the phone number) and signals the call set-up to the HLR. The HLR then checks if the number is a valid number and whether that user has subscribed to this particular service. If so then an MSRN (Mobile Subscriber Roaming Number) is requested from the subscriber’s current VLR.

How is a subscriber number assigned to a mobile station?

Subscriber Number (SN) : Maximum 10 decimal places. Mobile Station Roaming Number (MSRN) is an interim location dependent ISDN number, assigned to a mobile station by a regionally responsible Visitor Location Register (VLA). Using MSRN, the incoming calls are channelled to the MS. The MSRN has the same structure as the MSISDN.

How is a call terminated in a GSM phone?

The mobile terminated call set-up is described below. Initially the user dials the mobile number. It reaches the PSTN/ISDN/Switching office where it is identified as a GSM call (by the destination code mentioned) and forwards it to the gateway MSC i.e. GMSC.