What is MME code in LTE?
An MME code (MMEC) uniquely identifies the MME within all the pool areas. A group of MMEs is assigned an MME Group Identity (MMEGI) which works along with MMEC to make MME identifier (MMEI). A MMEI uniquely identifies the MME within a particular network.
What is Guti and Gummei?
The GUTI (Globally Unique Temporary Identity) has two main components, the GUMMEI (Globally Unique MME Identifier) that uniquely identifies the MME that allocated the GUTI and the M-TMSI (M-Temporary Mobile Subscriber Identity) that provides for an unambiguous identity of the UE within this MME.
What are LTE identifiers?
| LTE IDs(Identifiers) | Description | Structure with size |
|---|---|---|
| MSIN | Mobile Subscriber Identification Number,assigned by operator | 9 or 10 digits |
| TIN | Temporary Identity used in Next Update, GUTI is stored in TIN parameter which is MM context of the LTE UE. TIN indicates which temporary ID will be used in the next update. | TIN= GUTI |
What is tracking area list in LTE?
A tracking area is the LTE (Long-Term Evolution) counterpart of the location area and routing area. Tracking areas can be grouped into lists of tracking areas (TA lists), which can be configured on the User Equipment (UE).
What is S TMSI and M TMSI?
The S-TMSI is similar in format to the P-TMSI. It is used to protect the subscribers IMSI during NAS interaction as well as identifying the MME (Mobility Management Entity) or MME pool that is responsible for the UE. The S-TMSI is constructed from the MMEC (MME Code) and the M-TMSI.
How many Enodeb are in a TAC?
Tracking Area Codes (TACs) or TAs: it is group of eNodeBs in one small area with maximum number of 100 eNodeBs.
Why is Guti used?
So, to keep an IMSI secure, an alternate value that a subscriber (UE) can use instead of the IMSI (whenever possible) to access the LTE network was needed. That is why GUTI is used. Unlike an IMSI, a GUTI is not permanent and is changed into a new value whenever generated.
Why Guti is used in LTE?
In LTE, the GUTI is the Globally Unique Temporary ID, and identifies the mobile device to the LTE network. The GUTI is assigned to the device by the Mobility Management Entity (MME), the access network’s primary control node.
What is IMSI and TMSI?
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 LAC and TAC in LTE?
The Location Area Code/Tracking Area Code, abbreviated as LAC/TAC, is an identifier of the location area within an MNO’s network. This part of the code can be represented using hexadecimal values with a length of two octets. The served area of a cellular radio network is usually divided into location areas.
What is TAC in Enodeb?
Tracking Area Codes (TACs) or TAs: it is group of eNodeBs in one small area with maximum number of 100 eNodeBs. TAC and TAL planning is to determine the size of a TAC and TAL border.
What is M TMSI in LTE?
M Temporary Mobile Subscriber Identity. The M-Temporary Mobile Subscriber Identity provides for an unambiguous identity of the UE within a particular MME.
What is the difference between IMSI and TMSI?
What is Mme pooling?
An MME pool area is an area through which the mobile can move without a change of serving MME. Every pool area is controlled by one or more MMEs, while every base station is connected to all the MMEs in a pool area by means of the S1-MME interface. Pool areas can also overlap.
What is TAC in eNodeB?
What is Guti 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. The GUTI is assigned to the device by the Mobility Management Entity (MME), the access network’s primary control node.
Why is Guti required?
The GUTI is assigned to the device by the Mobility Management Entity (MME), the access network’s primary control node. 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.
Why do we need TMSI?
What is MIB and SIB in LTE?
In LTE, MIB contains very limited information. It contains information about the cell bandwidth, some information about PHICH (Physical HARQ Indicator Channel) and the SFN. The SIB’s as I mentioned are transmitted on DL-SCH mapped on PDSCH.