Junghoon Jee

IPv6 Neighbor Discovery Protocol for Common Prefix Allocation in IEEE 802.16

IEEE 802.16 is one of broadband wireless access technologies and will become a key technology for growing wireless IP network. However, point-to-point oriented network such as IEEE 802.16 introduces some issues in applying conventional standard IPv6 neighbor discovery protocol (NDP). Following the previous 3GPP model for IPv6 NDP is not flexible in IPv6 link configuration since it assigns different network prefixes to each subscriber stations. We presents a mechanism which can allocate a common network prefix to all subscriber stations under the same IPv6 link. Through this mechanism, the standard IPv6 NDP can be applied to IEEE 802.16 networks without modifying conventional host-side operation

Performance Comparison of Existing Mobility Management Schemes for NGN

A variety of schemes for mobility are currently studied in ITU-T, 3GPP, IETF, and so on. The ITU-T (SG-19) considers Q.MMF, the 3GPP standardized IMS, the IETF currently uses mobile IP (MIP). For supporting mobility, there are many performance parameters, such as location registration delay, handover delay, packet delivery delay, signaling cost, location update cost, packet delivery cost. However the performance comparison of all existing schemes is not examined as yet. So, this paper investigates and compares the performance of MIPv6, IP2, Q.MMF, IMS to location registration. The time and cost of location registration are associated with the flow of messages between entities according to the procedure. We investigate the variation and performance comparison in the location registration time and cost using the performance metric

Comparison of Handover schemes for Next Generation Networks

For seamless service, mobility should be supported in the NGN. For this, there have been many contributions, such as MIPv6, IP2, Q.MMF, IMS. In mobility area, handover latency time is the first parameter to consider. However, above all are not compared up to now. Therefore this paper presents the performance comparison of handover latency times. For this, we use NS-2 simulator. In simulation results, we shown that IP2 has minimum value as compared with other mechanisms about the handover latency time