IMEI Check during Periodic TAU Support for NB IoT Devices

Feature Summary and Revision History

Summary Data

Applicable Product(s) or Functional Area

MME

Applicable Platform(s)

  • ASR 5500

  • VPC-DI

  • VPC-SI

Feature Default

Disabled - Configuration Required

Related Changes in This Release

Not applicable

Related Documentation

  • Command Line Interface Reference

  • MME Administration Guide

Revision History

Revision Details

Release

IMEI Check during Periodic TAU Support for NB IoT Devices was first introduced in release 21.3.13. With this release, this feature is also applicable to release 21.5.16.

21.5.16

First introduced.

21.3.13

Feature Changes

If IMEI is available for UE, the MME sends ME-Identity-Check-Request (MICR) to EIR (Equipment Identity Register) whenever NB IoT device does a periodic TAU.

Previous Behavior: MME never sent the ME-Identity-Check-Req to EIR when NB IoT devices did periodic TAU.

New Behavior: When IMEI is available for an UE, MME sends MICR to EIR whenever NB IoT device does a Periodic TAU. If IMEI is not available, the MICR is not sent.

Depending on the Equipment-Status received from the EIR in ME-Identity-Check-Answer (MICA), the MME will take action based on the MME configuration.

Customer Impact: Enhanced security for NB IoT devices due to IMEI check in periodic TAU.

Command Changes

imei-query-type verify-equipment-identity

To enable this feature, use the existing CLI commands in one of the following configuration modes:

Call Control Profile

configure  
   call-control-profile call_control_profile 
      attach imei-query-type imei verify-equipment-identity 
      end

Or

configure  
   call-control-profile call_control_profile 
      tau imei-query-type verify-equipment-identity 
      end

MME Service

configure  
   mme-service service_name 
      policy attach imei-query-type verify-equipment-identity 
      end

Or

configure  
   mme-service service_name 
      policy tau imei-query-type verify-equipment-identity 
      end

Notes:

  • verify-equipment-identity : Specifies that the identification (IMEI or IMEI-SV) of the UE is to be performed by the Equipment Identity Register (EIR) over the S13 interface.