Madjid Nakhjiri is currently a researcher and network architect with Motorola Labs. He has been involved in the wireless communications industry since 1994. Over the years, Madjid has participated in the development of many cellular and public safety mission-critical projects, ranging from cellular location detection receiver design and voice modeling simulations to the design of architecture and protocols for QoS-based admission, call control, mobile VPN access and AAA procedures for emergency response networks. Madjid has been active in the standardization of mobility and security procedures in IETF, 3G and IEEE since 2000 and is a coauthor of a few IETF RFCs. Madjid has also coauthored many IEEE papers, chaired several IEEE conference session and has many patent applications in process. Mahsa Nakhjiri is currently a systems engineer with Motorola Personal Devices and is involved in future cellular technology planning. Mahsa holds degrees in Mathematics and Electrical Engineering and has specialized in mathematical signal processing for antenna arrays. She has been involved in research on cellular capacity planning and modeling, design and simulation of radio and link layer protocols and their interaction with transport protocols in wireless environments. Mahsa has also worked with cellular operators on mobility and AAA issues from an operator perspective.