name: IMEI
full_form: International Mobile Equipment Identity
context: The Mobile Equipment Identity Check Procedure permits the operator(s) of the MME and/or the HSS and/or the PDN GW to check the Mobile Equipment's identity (e.g. to check that it has not been stolen, or, to verify that it does not have faults). The ME Identity can be checked by the MME passing it to an Equipment Identity Register (EIR) and then the MME analysing the response from the EIR in order to determine its subsequent actions (e.g. sending an Attach Reject if the EIR indicates that the Mobile Equipment is prohibited). The ME identity check procedure is illustrated in Figure 5.3.10.5-1. Figure 5.3.10.5-1: Identity Check Procedure 1. The MME sends Identity Request (Identity Type) to the UE. The UE responds with Identity Response (Mobile Identity). 2. If the MME is configured to check the IMEI against the EIR, it sends ME Identity Check (ME Identity, IMSI) to EIR. The EIR responds with ME Identity Check Ack (Result). NOTE: The Identity Check Procedure is typically executed as part of the Attach procedure (see clause 5.3.2.1).
description: The International Mobile Equipment Identity (IMEI) is a unique identifier assigned to mobile equipment, such as mobile phones or tablets, for identification purposes within the telecommunications network. It plays a crucial role in the ME identity check procedure, allowing operators of the MME and/or HSS and/or PDN GW to verify the legitimacy and functionality of the mobile equipment, preventing unauthorized access or usage.
explanation: IMEI is classified as an Identifier because it serves as a unique code for identifying mobile equipment within the telecommunications network. The ME identity check procedure relies on IMEI to authenticate and authorize mobile devices, ensuring secure and legitimate connections.
section_title: 5.3.10.5 ME identity check procedure
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