As LTE deployment gathers momentum, operators are paying serious attention to implement voice and SMS on par with its circuit-switched predecessor (UMTS/GSM). The all IP LTE core in conjunction with IMS enables a full suite of rich communication services (RCS) like instant messaging, high definition voice, presence, video and group chats. This course covers details of voice, SMS and multi-media implementation in the LTE network.
EXPECTED ACCOMPLISHMENTS
- List different approaches for providing voice over LTE networks
- Describe EPS architecture in conjunction with IMS
- Describe IMS functionality
- Identify the different roles of the CSCF
- Describe how LTE-EPC, PCC, and IMS interworking in VoLTE network
- Specify operation of CSFB
- Specify operation of SRVCC
- Specify VoLTE specific RAN features in LTE
- Specify how SMS can be supported in LTE
- Describe the main step in setting up of a VOLTE call
- Specify VOLTE performance in terms of latency, coverage and capacity
- Engineering personnel involved in LTE Radio Access Network Design, deployment, and operations.
TARGET AUDIENCE
Managers, Engineers, and Technicians involved in the planning, deployment and maintenance of mobile networks
COURSE DETAILS
LTE Review
- Evolved packet system
- LTE timeline and targets
- Frequency bands
- LTE air interface technologies
- VoIP and OTT service providers
EPS QoS
- QoS differentiation
- EPS bearers-default and dedicated
- Traffic flow templates
- QoS Class Identifier (QCI)
EPS Connection Management
- LTE attach procedure
- LTE RRC states
- RRC connection management
- LTE tracking areas
- Handover procedure
- User plane switching in handover
- Neighbor list generation
- Intersystem packet handover
Circuit Switched Fall Back (CSFB)
- CSFB requirements
- CSFB and SMS over SGs
- SGs protocol stack
- UE configuration
- Combined TA/LA update
- MO/MT call
Voice over LTE (VOLTE)
- IMS interworking
- Vertical and horizontal integrated networks
- IMS architecture
- CSCF types -PCSCF, SCSCF and ICSCF
- Key IMS protocols
- SIP/SDP message structure
- Default EPS bearer for SIP signaling
- EPS bearer for media
- Network initiated resource allocation
- Registration and IMS registration
- Mobile to mobile call
- Mobile to PSTN call
- IMS security and authentication
VOLTE Performance
- LTE voice end to end delay budget
- Latency evolution
- LTE voice with TTI bundling
- LTE voice capacity
- LTE voice spectral