1. Requirements for Seamless Handoff between WLAN and Cellular Networks
Jan. 2004
Requirements for Seamless Handoff between WLAN and Cellular Networks
Dr. Dong-Jye Shyy
MITRE
Jan. 2004, Vancouver
Dong-Jye Shyy, MITRE

2. Jan. 2004
Introduction
The baseline document needs to have a requirements section to address different types of handoff scenarios. The requirements include
QOS
Service continuity or session continuity
Security
Mobile client capability
e.g. Is Subscriber Identification Module (SIM) or Removal-User Identify Module (R-UIM) needed?
Dong-Jye Shyy, MITRE

3. Jan. 2004
An Example
The VoIP Requirements during handoff between WLAN and cellular networks are
Combined layers 2/3 handoff delay < 40 ms
Packet loss < 0.5%
Service (not session) continuity during handoff
Security level continuity during handoff
Client requirement: TBD
Dong-Jye Shyy, MITRE

4. Jan. 2004
Conclusion
Suggest to work on the requirements for seamless handoff between WLAN and cellular networks as the first priority of this group
Same type of requirements should also be established for other handoff scenarios (e.g. between and )
Dong-Jye Shyy, MITRE