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LTE Ids(Identifiers)-PLMN ID, IMSI, MNC, MCC, GUTI, MSIN, TIN, S-TMSI, M-TMSI, GUMMEI, MMEI, MMEGI, MMEC, C-RNTI, IMEI, IMEI/SV, ECGI, EPS Bearer ID, PGW ID, ECI, TAC, TAI, PDN ID, TAI List, DRB ID, LBI, E-RAB ID, TEID

This page covers LTE IDs(Identifiers) viz. PLMN ID, IMSI, MNC, MCC, GUTI, MSIN, TIN, S-TMSI, M-TMSI, GUMMEI, MMEI, MMEGI, MMEC, C-RNTI, IMEI, IMEI/SV, ECGI, EPS Bearer ID, PGW ID, ECI, TAC, TAI, PDN ID, TAI List, DRB ID, LBI, E-RAB ID, TEID etc.


LTE IDs(Identifiers) Description Structure with size
PLMN ID Public Land Mobile Network Identifier,Unique identification of PLMN PLMN ID (not more than 6 digits) = MCC + MNC
IMSI International Mobile Subscriber Identity, Unique ID of mobile subscriber Network gets the PLMN of the subscriber IMSI (not more than 15 digits) = PLMN ID + MSIN = MCC + MNC + MSIN
MNC Mobile Network Code,assigned by National Authority 2 or 3 digits
MCC Mobile Country Code,assigned by ITU 3 digits
GUTI Globally Unique Temporary UE Identity, To identify a UE between the UE and the MME on behalf of IMSI for security reason GUTI (not more than 80 bits) = GUMMEI + M-TMSI
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
S-TMSI SAE Temporary Mobile Subscriber Identity, To locally identify a UE in short within a MME group (Unique within a MME Pool) S-TMSI (40 bits) = MMEC + M-TMSI
M-TMSI MME temporary mobile subscriber identity 32 bits, This is unique within a MME
GUMMEI Globally Unique MME Identity,To identify a MME uniquely in global GUTI contains GUMMEI GUMMEI (not more than 48 bits) = PLMN ID + MMEI
MMEI MME Identifier,To identify a MME uniquely within a PLMN Operator commissions at eNBMMEI MMEI (24 bits) = MMEGI + MMEC
MMEGI MME Group Identifier, Unique within a PLMN 16 bits
MMEC MME Code,To identify a MME uniquely within a MME Group. S-TMSI contains MMEC 8 bits
C-RNTI Cell- Radio Network Temporary Identifier,To identify an UE uniquely in a cell 0x0001 ~ 0xFFF3 (16 bits)
IMEI International Mobile Equipment Identity, To identify a ME (Mobile Equipment) uniquely size of 15 digits; IMEI=TAC+SNR+CD
IMEI/SV IMEI/Software Version,To identify a ME(Mobile Equipment) uniquely size=16 digits; IMEI/SV=TAC+SNR+SVN
ECGI E-UTRAN Cell Global Identifier, To identify a Cell in global (Globally Unique) EPC can know UE location based of ECGI ECGI (not more than 52 bits) = PLMN I D + ECI
ECI E-UTRAN Cell Identifier, To identify a Cell within a PLMN ECI (28 Bits) = eNB ID + Cell ID
PGW ID PDN GW Identity, To identify a specific PDN GW (P-GW) HSS assigns P-GW for PDN connection of each UE IP address (4 bytes) or FQDN (variable length)
TAI Tracking Area Identity, To identify Tracking Area Globally uniqueTAI TAI (not more than 32 bits) = PLMN ID + TAC P-GW
TAC Tracking Area Code, To indicate eNB to which Tracking Area the eNB belongs (per Cell) Unique within a PLMN 16 bits
TAI List Tracking Area Identity List, UE can move into the cells included in TAL list without location update (TA update) Globally unique Variable length
PDN ID Packet Data Network Identity PDN Identify = APN = APN.NI + APN.OI (variable length)
EPS Bearer ID Evolved Packet System Bearer Identifier, To identify an EPS bearer (Default or Dedicated) per an UE 4 bits
E-RAB ID E-UTRAN Radio Access Bearer Identifier, To identify an E-RAB per an UE 4 bits
DRB ID Data Radio Bearer Identifier, To identify a DRB per an UE 4 bits
LBI Linked EPS Bearer ID, to identify the default bearer associated with a dedicated EPS bearer 4 bits
TEID Tunnel End Point identifier, To identify the end point of a GTP tunnel when the tunnel is established 32 bits

LTE Tutorial related links

What is LTE?  Terminology  3GPP ref   LTE tutorial  LTE Features  UE categories  LTE Bands  EARFCN vs frequency   LTE frame  FDD vs TDD   PHY  protocol stack  throughput  VoLTE  CA
UE cell search  UE network entry  Timers  PSS vs SSS  LTE RS DMRS SRS  LTE Channels  BW vs FS vs RB  Zadoff chu sequence  LTE Advanced   eNodeB Measurements  UE Measurements  SC-FDMA Vs OFDMA   LTE Security  

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