1 LTE Identifiers 2014 Inc. All Rights Reserved (c) 2014 Inc. 1. IMSI. International Mobile Subscriber Identity Identifies the SIM or USIM. MSIN. PLMN. Mobile Subscriber Public Land Mobile Network Identification Number MCC MNC. HLR/HSS Subscriber Mobile Country Mobile Identity Identity Code Network Code 3 digits 2 to 3 digits (c) 2014 Inc. 2. GUTI. Globally Unique Temporary Identifier Identifies the UE globally without revealing identity GUMMEI. M-TMSI. Globally Unique Mobile Management Entity Identifer MME Group Identifies MCC MNC MME Code ID the mobile 3 digits 2 to 3 digits 1 nibble per 1 nibble per 16 bit 8 bit 32 bit digit digit (c) 2014 Inc. 3. MME S-TMSI. Used for mobile Identifier paging MME MME MME. M-TMSI. Group ID Code Code 16 bit 8 bit 8 bit 32 bit (c) 2014 Inc. 4. IMEISV. International Mobile Equipment Identity with Software Version Identifies the mobile equipment serial number, hardware model number and software version number TAC SNR SVN. Type Approval Serial Number Software Version Code 8 digits 6 digits 2 digits (c) 2014 Inc.
2 5. Radio Network Temporary Identifier (RNTI). P-RNTI RA-RNTI C-RNTI SI-RNTI. Identifies a Assigned in Identifies Sent on group of response to the mobile PDCCH to mobiles in a random within a specify the a paging access cell location of message preamble Can be System Derived UE will use temp, semi Information from the the RA- persistent Blocks on IMSI of the RNTI to or the PD-SCH. user initiate the permanent Not mobile RRC specific Connection (c) 2014 Inc. 6. C-RNTI. Semi persistent C- Permanent C- Temp C-RNTI. RNTI RNTI. Allocated during Used to C-RNTI value the random schedule semi assigned after access persistent contention procedure resources via resolution after May turn into a the PDCCH a random access permanent C- SPS-CRNTI is Used for RNTI after used for scheduling contention scheduling dynamic resolution persistent resources scheduling, (c) 2014 Inc. 7. TAI. Tracking Area Identity Tracking area contains several cells. Typically all cells of a eNodeB would constitute a tracking area.
3 MCC MNC TAC. Mobile Country Code Mobile Network Code Tracking Area Code 3 digits 2 to 3 digits 16 bits (c) 2014 Inc. 8. PDN ID. Packet Data Network Identity APN. Access Point Name <APN-NI>. <MNC>.mcc<MCC>. APN-NI APN-OI. APN Network Identifier APN Operator Identifier Defines the PDN to which the Defines the PLMN in which UE requests connectivity the PDN GW is located (c) 2014 Inc. 9. LTE Bearer Establishment Identifiers EPS Bearer ID E-RAB ID DRB ID. Evolved Packet E-UTRAN Data Radio System Bearer Radio Access Bearer Identifier Bearer Identifier Identifies an Identifier Identifies a EPS bearer Identifies an E- DRB per within (Default or RAB per within a UE. Dedicated) a UE 4 bits within a UE 4 bits 4 bits (c) 2014 Inc. 10. More LTE Identities Uniquely identifies UE within a eNB. eNB S1AP UE ID The ID is used over the S1-MME interface 32 bit MME S1AP UE Uniquely identifies a UE within an MME. The ID is used over the S1-MME interface ID 32 bit Tunnel Endpoint Identifier TEID Endpoint in a GTP Tunnel Globally identifies the eNB.
4 Global eNB ID PLMN id + eNB ID. (c) 2014 Inc. 11. Thank You Thank you for visiting The following links provide more information about telecom design tools and techniques: Links Description EventStudio System Designer Sequence diagram based systems engineering tool. VisualEther Protocol Analyzer Wireshark based visual protocol analysis and system design reverse engineering tool. Telecom Call Flows GSM, SIP, , ISUP, LTE and IMS call flows. TCP/IP Sequence Diagrams TCP/IP explained with sequence diagrams. Telecom Networking Software Real-time and embedded systems, call flows and object oriented design articles. (c) 2014 Inc. 12.