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LTE & VoLTE Architecture: Part 1

LTE & VoLTE Architecture: Part 2

  • Hongyan

    PDCCH Construction

    • 9 Comments
    The PDCCH (Physical Downlink Control Channel) in LTE carries UE-specific scheduling assignments for Downlink (DL) resource allocation, Uplink (UL) grants, PRACH (Physical Random Access Channel) responses...
  • Don

    Codewords and Layers and Ports, Oh My!

    • 1 Comments
    We throw a lot of terms around when we discuss LTE data transmissions, especially when we get into some of the details of sending data over the PDSCH using multiple antenna techniques. We describe transport...
  • Lauro

    RACH Preamble Planning

    • 3 Comments
    The total number of RACH preambles available in LTE is 64. These preambles are shared among users for initial access and handover. Access to LTE systems can be classified based on the reservation or not...
  • Lauro

    Handover Parameters (Part 1 of 3)

    • 4 Comments
    There are three ways of optimizing handovers in LTE: a) Via the modification of the parameters a3offset and hysteresisa3 b) By changing the parameter timetotriggereventa3 c) Via the modification...