U-RNTI - UTRAN Radio Network Temporary Identifier

The UE (User Equipment) having an RRC (Radio Resource Control) connection will be allocated a S-RNTI (Serving Radio Network Temporary Identifier). The SRNC (Serving Radio Network Controller) identifier together with S-RNTI is a unique identifier of the RRC connection within a network. The combination of SRNC identifier and S-RNTI is referred to as U-RNTI (UTRAN Radio Network Temporary Identifier), which is used on the radio interface.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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