A Literature Survey on Handoff for Mobile IPv6 <s> VII. COMPARISION <s> As the number of portable devices roaming across the Internet increases, the problem of routing packets to mobile hosts generates increasing research and commercial interest. This paper presents a hierarchical scheme to support mobility in the Internet. This scheme is based on the multicast routing protocol PIM-SM. In this proposal, a mobile node is seen by its correspondent nodes as a special multicast group. Packets destined for a mobile host are delivered to its RP (rendezvous point) and then forwarded to the mobile node's current location. Our scheme has two main benefits. First, it is hierarchical and therefore reduces handoff latency and the load on the Internet. Second, it uses IP multicast and consequently benefits from its diffusion property, which can be very useful for providing smooth subnet handoffs. We compare the performance of our approach with the IETF Mobile IPv6 proposal. We show that while our approach has a larger memory space requirement, it reduces the network load, provides smoother and faster subnet handoffs and frees the mobile hosts from mobility support procedures. <s> BIB001 </s> A Literature Survey on Handoff for Mobile IPv6 <s> VII. COMPARISION <s> This paper addresses the problems of routing datagrams to nodes located in an IPv6 mobile network. A mobile network is a network that is changing its point of attachment dynamically such as a network deployed in an aircraft, a boat, or a car. The IETF Mobile-IPv6 protocol that has been developed to support mobile nodes is unable to support mobile networks efficiently. In fact, we show that Mobile-IPv6 would not scale and would introduce some authentication problems. This paper proposes a solution that combines multicast routing with Mobile-IPv6 to support mobile networks in the Internet. <s> BIB002
Through above analysis of various schemes, it comes to conclusion clearly about the advantages and disadvantages of various options, the following comparisons are carried out according to the criteria of Mobile IPv6 from switching delay, data packets loss, signal load and design complexity. Depending on actual demand and actual network characteristics, we can select the appropriate switching scheme to meet the needs of users as possible. Because of various problems on basic Mobile IPv6, it is not able to meet the needs of mobile users either, and then various modified handover methods are proposed. As network technology evolves, the following areas will become the next hot research topics: (1)Wireless access fast Switching based MPLS, switching strategy based on flow label BIB001 , switching strategy base on multicast BIB002 (2)Fast seamless switching, utilizing MN to cache TCP ACK to improve switching performance  (3)Pursuing switching technology of low latency, simple to implement and easy to promote switching. 