Operational Experiment of Seamless Handover of a Mobile Router using Multiple Care-of Address Registration

Abstract

Abstract-NEMO Basic Support (NEMO BS) adds a mobility function to IPv6 routers, such a router is called as a mobile router. The network behind the mobile router (mobile network) becomes logically static. This function is considered useful when a network has a lot of nodes that do not have a mobility function but move with the network. The typical usage of this technology is the network provided in a transportation system like a bus or airplane. In the base specification of NEMO BS, a mobile router can use one IPv6 address as its attachment point at one time. Therefore, the mobile router and its mobile network will face service disruption of network connectivity while the mobile router is moving from one network to other network. In this paper, we explain two operational experiments of network mobility. One is an experiment using only the base NEMO BS function. The other is an experiment of seamless handover using multiple network interfaces to solve the problem. In these experiments, the mobile networks were actual conference networks which held a few hundred people. The result shows that the multiple interfaces usage provides one-third to one-tenth of the packet loss rate compared to the case that is not using the technology. Also most attendees of the conference did not notice the movement, which means the technology can be used for the realistic solution for the seamless handover.Index Terms-Network Mobility, Multiple Interfaces, Seamless Handover, Real Network I. BACKGROUND Network Mobility Basic Support (NEMO BS), specified as RFC3963 [1], adds a mobility function to IPv6 routers. With the function, an entire IPv6 network served by a mobile router (a router with a mobility function) can be a mobile network. The nodes inside the mobile network can use static IPv6 addresses which never change regardless of the attachment point of the mobile router.One of possible applications of this technology is to provide a network in moving entities, such as buses, trains, airplanes, etc. Those moving entities may connect various network access points depending on its location. The address assigned to the mobile router from the router of each access point will differ depending on each access point, since IPv6 addresses are usually assigned based on the network topology. The NEMO BS technology hides the address change of the mobile router and provides transparent access to the Internet from the nodes inside the mobile network.Although the specification has been completed, we need more experience to deploy the technology widely. The more experience of the real operation is necessary to prove the usefulness of the technology and to find any kind of problems that may not be noticeable from the specification. Based on this policy, we performed two experiments of a mobile network that accommodated the entire conference network for the WIDE [2] 2005 autumn meeting and the WIDE 2006 spring meeting under a mobile router. The mobile router changed its point of attachment from time to time, providing transparent access to the nodes ...

A study of multimedia application performance over Multiple Care-of Addresses in Mobile IPv6

“…The widely integrated distributed environment (WIDE) project [4], [19] adds Multiple Care-of Address support to Network mobility (NEMO) to achieve load balancing and fault Several studies [20], [21] point out on the direction of using multiple addresses to improve applications performance. Nevertheless, while the fist only considers ICMP traffic on mobile routers, the second considers VoIP [21] but without the simultaneous use of addresses.…”

Fuzzy logic based route optimization in a multihomed mobile networks

“…The HA can share traffic load with the neighbor MR-HA tunnel depending upon the measured tunnel latency. In [6] Shima et al proposed two operational experiments of network mobility. The first experiment is based on NEMO basic support in a real environment.…”

“…The first experiment is based on NEMO basic support in a real environment. The real environment was the WIDE 2005 autumn camp meeting [6]. At the meeting a wireless network was provided to the attendees.…”

“…But the result of this experiment shows a serious service disruption problem during handover. The second network mobility experiment uses the WIDE 2006 spring meeting environment [6]. The multiple care of address (CoA) registration mechanism [7] is used in this experiment which helps to use multiple network interfaces concurrently.…”