29/01/2016 Issues for Global Roaming in All IP based Networks 1GSC-9, Seoul SOURCE:TTA TITLE:Issues for Global Roaming in All IP based Networks AGENDA.

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29/01/2016 Issues for Global Roaming in All IP based Networks 1GSC-9, Seoul SOURCE:TTA TITLE:Issues for Global Roaming in All IP based Networks AGENDA ITEM:4.5 (Joint) CONTACT:Beomjoon Kim, , GSC9/Joint_017a

GSC-9, Seoul229/01/2016 Introduction IP-based Integration –Convergence of all wired/wireless networks via ‘loose coupling’ based on IP technology. 2G/2.5G, 3G, B3G, WLAN, and so on. Issues –IP Mobility –Real-time traffic support (e.g., VoIP) –Global roaming Horizontal in homogeneous networks and vertical between heterogeneous networks.

GSC-9, Seoul Common Requirements Non-real-time and real-time services in a single packet-switched network –VoIP and IP-based session control (e.g., SIP) –End-to-end QoS with call control Mobility Management IP-enable terminal

GSC-9, Seoul Standardization Bodies Almost all standardization bodies consider ‘a convergence’ on IP-based common platform. IETF 2G/2.5G Cellular 3G (3GPP, 3GPP2) B3G-related Bodies (WWRF, mITF, WWC, 4GMF..) WLAN (IEEE , HiperLAN..) WMAN (IEEE ) IEEE Handoff

GSC-9, Seoul IETF’s Activity Develops protocols used in IP networks Activities related to wireless IP –Mobility support in IP networks (e.g., MIPv4, MIPv6) –Multimedia support (VoIP, QoS control, SIP) –Enhancements to TCP for wireless links Facilitates interworking and roaming with other IP networks.

GSC-9, Seoul Issues for Discussion (1) Different scenarios of evolution between existing wireless networks. For example, each PP adopts two different schemes for mobility management. –GPRS-based (3GPP) –Mobile IP-based (3GPP2)

GSC-9, Seoul Issues for Discussion (2) Global Roaming –Due to limited capabilities of 2G and coverage of 3G, vertical roaming between 2G and 3G is expected. –However, there are no criteria for switching back a mobile to the 3G/2G network when it has been switched to 2G/3G network. 2G Coverage 3G coverage

GSC-9, Seoul Issues for Discussion (3) Inter-Operability between L2 related standards and L3 related standards –IEEE 802.xx focuses on specifying L2 protocols. –RFCs of IETF focuses on L3 protocols. For realizing a convergence based on IP, a sub-layer (e.g., so-called L2.5) may be needed.

GSC-9, Seoul Proposal It is needed to discuss what the role of the PSOs of GSC is in order to harmonize the global activities toward a common IP-based convergence. New Body (?)PSOs Standard bodies (3GPP/PP2, IEEE…etc) IETF