Omar

Expert Opinion

Expert Opinion
Short LTE articles and opinions by our team of Subject Matter Experts (SMEs)
  • Omar

    APN-FQDN Naming Structure

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    APN Usage In LTE, UEs get connected to one or more Packet Data Network (PDN), such as the Internet. The PDN Gateway (P-GW) interconnects LTE to the external PDN. Therefore, as part of the PDN Connectivity process, the UE may...
  • Omar

    Network Based Terminating Access Domain (T-ADS) Selection

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    (Blog Updated as of May 1, 2014) The SCC-AS , (Service Centralization and Continuity Application Server), is the entity in the VoLTE capable IMS network that determines how to terminate the call to the UE by applying either...
  • Omar

    Use of Session Transfer Number STN-SR in SRVCC

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    Purpose of STN-SR : According to TS 23.003, STN-SR follows the E.164 telecommunications number format, and is used by the MSC server for session transfer of the media path from the PS domain to the CS Domain. VoLTE is a key...
  • Omar

    The role of OpenFlow in CSPs’ SDN based network?

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    Software Defined Networks, (SDN), is a key part of the network transform efforts. In a simplified summary, SDN separates the control and data forwarding planes. As shown in the figure below, instead of having different mechanisms...
  • Omar

    Important SRVCC Access Transfer Identifiers

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    This blog discusses key access transfer identifiers, with more focus on the PS to CS domain access transfer. Roaming related variables are not considered in this blog. SC UE: - Single Carrier UE. An SC UE might support ICS...
  • Omar

    What if the UE’s requested APN is different from the HSS’s defined default APN?

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    The MME decides on which APN to select as a default APN based on information provided by the UE during the initial attach, and the subscriber profile received from the HSS in the Update Location Answer. The APN identifies the...
  • Omar

    UE Terminating Access Domain Selection (UE T-ADS)

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    In a previous LTE University blog, the network based T-ADS was discussed. Clause 5.3.1 of TS 23.292 discusses the UE T-ADS in which the network provides the UE the option to select the terminating access network domain which will...