T-ADS (Terminating Access Domain Selection) in IMS Network

T-ADS stands for "Terminating Access Domain Selection". It is a functionality in the IMS network that determines the access network that the terminating user equipment (UE) currently exists it.

This allows the IMS network to properly route the incoming call or message to this access domain that the terminating UE currently exists in.

  • VoLTE (Voice over LTE) Introduction

    VoLTE (Voice over LTE) Introduction

    While the UE attached to LTE network, the UE can initiate, or receive a voice or a video call. The UE achieves this, by connecting to an external network, which is the 'IMS' network. We can call this, Voice over LTE (VoLTE). This is exactly like when you would like to create a call, while…

  • What is an ‘EPS Bearer’ in LTE ?

    What is an ‘EPS Bearer’ in LTE ?

    During 'LTE attach' procedure, the network establishes this EPS Bearer between the UE and the PGW. The PGW assigns an IP address for this Bearer. The UE uses this IP address, in order to communicate with the PDN. In addition, the PGW assigns a QoS for this Bearer, which guarantees the QoS for the data…

  • LTE (4G) Network Architecture

    LTE (4G) Network Architecture

    LTE (4G) Network Nodes LTE refers to 'Long Term Evolution', and the architecture of the LTE (4G) network is as following, eNodeB The eNodeB is the 4G site that the UE connects to. It provides the radio interface to the UE. MME MME refers to 'Mobility Management Entity'. The MME is responsible for authenticating the…