Wi-Fi Offload
In a bid to improve both network capacity and data throughput, service providers are increasingly turning to Wi-Fi as a viable addition to their network infrastructure. This course explains how Wi-Fi offload is supported in terms of providing a seamless transition between the two radio technologies, tracking the architecture required, the mobility options available and the fundamental concepts of operation.
Section 1 - Wi-Fi Offload Architecture
Topic areas covered include:
- Wi-Fi Offload Architecture Fundamentals:
- Drivers for Wi-Fi Offload.
- Network Architectures:
- Trusted Non-3GPP Access.
- Untrusted Non-3GPP Access.
- Mobility Mechanisms:
- Host Based Mobility.
- Network Based Mobility:
- PMIPv6.
- GTP.
- Multi Access PDN Connectivity.
- Non-seamless Wi-Fi Offload.
- Network Architecture:
- Trusted Non-3GPP Access (GTP):
- UE, Access Point, TWAG, PDN-GW, HSS, AAA Server, PCRF, ANDSF.
- Protocol Stacks and Reference Points.
- Roaming Architectures:
- Home Routed.
- Local Breakout.
Section 2 - Wi-Fi Offload Initial Procedures
Topic areas covered include:
- Initial Procedure Fundamentals:
- Bearer Models and Bearer Mapping.
- Network Discovery and Selection:
- Network Discovery:
- RAN Assistance Information.
- ANDSF Rules.
- Accessing the Wi-Fi Network:
- Joining a Wi-Fi Network.
- Initial Attach:
- EAP Authentication (Part 1):
- Detailed Signalling Evaluation.
- Session Creation and Management:
- Detailed Signalling Evaluation.
- EAP Authentication (Part 2):
- Detailed Signalling Evaluation.
Section 3 - Wi-Fi Offload Mobility and Interworking
Topic areas covered include:
- Mobility and Interworking Fundamentals.
- Wi-Fi Mobility:
- Access Point Channel Reports.
- Wi-Fi Reassociation.
- 802.11 Amendments:
- 802.11k, 802.11r.
- Wi-Fi to LTE Handover:
- Detailed Signalling Evaluation.
- LTE to Wi-Fi Handover:
- Detailed Signalling Evaluation.
- Wi-Fi Offload and Roaming:
- Home Routed.
- Local Breakout.