Terms Of Handover Delay Research Articles

LR-AKE-Based AAA for Network Mobility (NEMO) Over Wireless Links

Network mobility introduces far more complexity than host mobility. Therefore, host mobility protocols such as Mobile IPv6 (MIPv6) need to be extended to support this new type of mobility. To address the extensions needed for network mobility, the IETF NEMO working group has recently standardized the network mobility basic support protocol in RFC 3963. However, in this RFC, it is not mentioned how authentication authorization and accounting (AAA) issues are handled in NEMO environment. Also, the use of IPsec to secure NEMO procedures does not provide robustness against leakage of stored secrets. To address this security issue and to achieve AAA with mobility, we propose new handover procedures to be performed by mobile routers and by visiting mobile nodes. This new handover procedure is based on leakage resilient-authenticated key establishment (LR-AKE) protocol. Using analytical models, we evaluate the proposed handover procedure in terms of handover delay which affects the session continuity. Our performance evaluation is based on transmission, queueing and encryption delays over wireless links

Performance impact of multihop handovers in an IP-based multihop radio access network

This paper presents and evaluates an IPv6-based protocol for the interconnection of ad hoc networks to the Internet. Its main novel feature is the support for different types of multihop handovers between two access routers. This topic represents an essential functionality of multihop radio access networks, but it has not been investigated so far in the context of a testbed. We measure and analyze the performance of different handover schemes in a testbed with IEEE 802.11b and ad hoc routing. We find that a proactive access router discovery scheme yields the lowest handover rate in our setup. Furthermore, it is advantageous to introduce optimizing multihop handovers, which gives mobile devices the opportunity to choose a new, better suited access router in case the hop distance to its current access router increases. Although this additional handover type increases the total number of handovers, it improves the system behavior in terms of handover delay and packet delivery fraction.

A Layer 3 Movement Detection Algorithm Driving Handovers in Mobile IP

The evolution and the spreading of wireless access technology and the consequent increase of user mobility will make handover procedures critical for the provision of Quality of Service in the next generation wireless Internet. Often, layer 3 handovers are supposed to be driven by access layer procedures. In this way, the movement detection delay can be reduced, but at the expenses of making the Mobile IP protocol dependent of lower layer implementations. Furthermore, this approach may not be effective when users roam among heterogeneous networks. Nevertheless, movement detection algorithms, which operate at the Mobile IP layer, imply appreciable delays, usually intolerable for real time services.In this paper, we propose a Mobile IP handover scheme based on a novel movement detection algorithm at layer 3, able to timely manage migrations by exploiting advertisements losses, combined with a two-timers mechanism.We analyze the performance of our algorithm in terms of handover delay and throughput, and we show that our solution is able to decrease the movement detection delay as much as 47% with respect to other literature solutions that pursue similar approaches. In addition, this feature implies also higher values of the throughput seen by the TCP layer.