VisualEther
EventStudio
Rust
5G
LTE
IMS
Telecom
Networking
Design
About
Learn about eNodeB startup: (1) eNodeB performs an S1 setup (2) MIB and SIB broadcast (3) eNodeB sends UE specific configuration information via the RRC Connection Setup message.
This sequence diagram explains with an example how LTE UEs connect to the eNodeB. Contention resolution between UEs also explored in this flow.
LTE attach and default bearer signaling flow describe the attach to a new MME followed by a default bearer setup.
Explore the S1AP handling of: (1) LTE Attach (2) PDN Setup and Default Bearer Setup for two PDNs (3) UE context release (4) Service Request.
The flow describes a tracking area update that results in MME change.
An iPhone setting up a VoLTE call with IMS signaling.
Presentation and signaling flow that describe the key exchange and signaling in LTE security procedures.
Authentication, Integrity Protection and Encryption. Generation of keys during LTE signaling procedures.
X2 interface connects eNodeBs in LTE. Explore the inter eNodeB handover procedures over the X2 interface.
S1 interface connects eNodeBs to the MME. S1 handover is used when the direct X2 interface is not available.
Examine the S1AP messages involved in an S1 Handover at full message level detail. In this scenario, the source and target eNodeBs are served by different MMEs.
Explore contents of messages exchanged during an X2 handover between two eNodeBs.
A 4G LTE subscriber initiates a voice call in an LTE network that does not support VoLTE. In such cases, the UE falls back to 3G networks to establish a voice call.
LTE support for 5G dual connectivity will enable 4G network operators to introduce 5G services with a minimal upgrade to support 5G data plane. This is achieved with the support for 4G eNB and 5G gNB dual connectivity (EN-DC),
LTE presentation with audio narration. OFDM basics, LTE channels, signaling procedures and MIMO are covered.
LTE is built over OFDM and SC-FDMA foundation. The video lectures build a conceptual understanding of OFDM and SC-FDMA.
Learn about the MAC layer. The logical, transport and physical channels are described. Signaling flows for random access and data transfer are also covered.
Covers Transparent Mode (TMD), Unacknowledged Mode (UMD) and Acknowledged Mode (AMD). RLC state variables and PDU formats are also described.
Robust Header Compression (ROHC) and PDCP PDU formats are covered.
Describes the RRC connection signaling procedure with detailed description of the RRC message contents.
Messages involved in LTE attach and default bearer setup are described in detail.
LTE signaling protocol define a large number of identifiers for UEs, RABs and signaling endpoints. The presentation covers the IMSI, GUTI, GUMMEI, IMEISV, RNTI, TAI and APN.
CUPS — Control and User Plane Separation