Ryuji Wakikawa

VANET via Named Data Networking

In this paper we apply the Named Data Networking [1], a newly proposed Internet architecture, to networking vehicles on the run. Our initial design, dubbed V-NDN, illustrates NDNs promising potential in providing a unifying architecture that enables networking among all computing devices independent from whether they are connected through wired infrastructure, ad hoc, or intermittent DTN. This paper describes a prototype implementation of V-NDN and its preliminary performance assessment, and identifies remaining challenges.

Data naming in Vehicle-to-Vehicle communications

Vehicular networking is becoming reality. Today vehicles use TCP/IP to communicate with centralized servers through cellular networks. However many vehicular applications, such as information sharing for safety and real time traffic purposes, desire direct V2V communications which is difficult to achieve using the existing solutions. This paper explores the named-data approach to address this challenge. We use case studies to identify the design requirements and put forth a strawman proposal for the data name design to understand its advantages and limitations.

Rapid traffic information dissemination using named data

This paper applies the Named Data Networking (NDN) concept to vehicle-to-vehicle (V2V) communications. Specifically, we develop a simple traffic information dissemination application based on the data naming design from our previous work and evaluate its performance through simulations. Our simulation results show that data names can greatly facilitate the forwarding process for Interest and data packets. With adequate vehicle density, data can propagate over long distances robustly at tens of kilometers per second, and a requester can retrieve the desired traffic information 10km away in a matter of seconds.

Internet connectivity for mobile ad hoc networks

The need for ad hoc networks arises when a number of mobile nodes gather in one particular location and form autonomous networks. Ad hoc networks can be adjoined to the Internet, introducing routing and addressing issues that require new features from ad hoc networking protocols. The Internet Gateway can offer global addressability and bidirectional Internet connectivity to every node in the ad hoc network. This can be done in such a way that mobile wireless nodes can migrate between wireless access points that have direct access to the wired Internet and the wireless ad hoc networks that do not have any such local access point infrastructure. Mobile IP can be employed to make such movement seamless (whenever physically possible), even though it occurs between domains with previously incompatible routing models. We believe that IPv6 and Mobile IPv6 afford important advantages for making such attachments, especially regarding router advertisement and address autoconfiguration. In this paper, we show how general ad hoc networks can be connected to the Internet by Internet Gateways, and then describe our specific experiments with Ad hoc On-Demand Distance Vector Routing (AODV) for IPv6 (AODV6). After demonstrating the basic principles allowing access to the Internet, we then detail our further experiments using Mobile IPv6. Copyright (C) 2002 John Wiley Sons, Ltd. (Less)

ORC: optimized route cache management protocol for network mobility

In this paper, we describe the Optimized Route Cache Management Protocol (ORC) as a network mobility protocol and evaluated it through experiments on a prototype implementation. ORC provides mobility transparency to a network regardless of network movements. Mobile network is a network that moves entirely. Typical examples for a mobile network are personal area networks (PAN) and networks inside vehicles. ORC is based on mobile IPv6 and is combined with the Internet routing mechanisms for network mobility management. ORC assigns a unique unchanging subnet prefix to a mobile network and notifies and maintains a mobile networks route called binding route (BR). A BR is an association between the prefix of the mobile network and a current available address known as care-of address in mobile IPv6. ORC allows interior gateway protocol (IGP) routers named ORC routers to cache a BR. ORC routers intercept packets destined to the mobile network and route them to the mobile network according to the BR. The BR must be updated as soon as the mobile network changes the care-of address by its topological position, employing constant BR exchange to ORC routers and temporary BR exchange to dynamically discovered ORC routers. Based on the experimental results, ORC is confirmed to provide network mobility and optimal communication in terms of route optimization. The evaluation shows that route optimization is required for network mobility to improve communication performance.

DMND: Collecting data from mobiles using Named Data

Technology advances in both computations and wireless communications have made it economically feasible for manufacturers to collect data from all the cars in order to monitor their operations and detect any potential problems. However to make this a reality requires a new architecture that can effectively handle vehicle mobility, intermittent connectivity, and data security, as well as scale to large number of vehicles. In this paper we address these design challenges by exploring the direction of Named Date Networking (NDN) (aka CCN1). We evaluated our design, dubbed DMND, through simulations in Qualnet. Our results show that, when data publishers (vehicles) are stationary, more than 99% of collection requests can successfully pull data packets back; even when vehicles move at a high speed of 40–50 meters per second (89.48–111.8 miles/hour), DMND can still retain its high efficiency of 97% of data replies. In contrast, under the same simulation experimental setting, the request-reply ratio of MobileIP drops from 97.9% for static publishers to 9.6% when publishers are moving at a speed of 10–20 meters/second (22.37–44.74 miles/hour).

Migrating home agents towards internet-scale mobility deployments

While the IETF standardization process of the Mobile IPv6 and Network Mobility (NEMO) protocols is almost complete, their large-scale deployment is not yet possible. With these technologies, in order to hide location changes of the mobile nodes from the rest of the Internet, a specific router called a home agent is used. However, this equipment generates resilience and performance issues such as protocol scalability and longer paths. In order to solve these problems, we describe and analyze a new concept called Home Agent Migration. The main feature of this solution is the distribution of home agents inside the current Internet topology to reduce distances to end-nodes. As is usually done for anycast routing, they advertise the same network prefix from different locations; moreover they also exchange information about their associations with mobile nodes. This produces a Global Mobile eXchange (GMX), an overlay network that efficiently handles data traffic from and to mobile nodes, and operates home agents as would an Internet eXchange Point (IXP). When a correspondent node needs to exchange packets with a mobile node, the data traffic will be intercepted by its closest GMX home agent and redirected to the home agent to which the mobile node is bound.

AODV and IPv6 internet access for ad hoc networks

This paper describe briefly how the Ad hoc On-demand Distance Vector (AODV) routing protocol can be used for internetworking between wireless ad hoc networks and the IPv6 Internet. This solution relies on the signalling of AODV to find an access providing Internet Gateway that is able to distribute a globally routable prefix for the ad hoc network. We have tried to evaluate this solution by means of simulation in order to stress the design and find areas that need improvement. We have observed that a critical factor in this design is how to determine whether the node is located in the ad hoc network, or located on the Internet. In addition to these design considerations we have also investigated common performance metrics such as end-to-end delay, delivery ratio and routing overhead and verified that these are not affected in a negative way by the design.

ACM HotMobile 2013 poster: vehicular inter-networking via named data

In this paper we apply the Named Data Networking, a newly proposed Internet architecture, to networking vehicles on the run. Our design, V-NDN , illustrates NDNs promising potential to providing a unifying architecture that enables networking among all computing devices independent from whether they are connected through wired infrastructure, ad hoc, or intermittent DTN.

Support mobility in the global internet

Todays technology trend indicates that billions of hand-held gadgets as well as other types of mobile devices will be coming online in the next few years. While the existing Internet mobility standards, namely Mobile IP, is waiting for a wide adoption, cellphone networks are providing the ubiquitous mobility services on a global scale as of today. They have also promoted IP core network architecture and adopted Proxy Mobile IPv6, an extension to Mobile IP, for their mobility service. There is an open question regarding whether the Internet would, or would not, require significant architectural changes to provide universal mobility support at a scale that is likely to go far beyond the scale and scope of todays cellular telephone services. In this paper, we examine the fundamental di erences between the mobility service models provided by Internet and cellphone systems. We argue that decoupling network access control from mobility support can provide an architecturally promising direction for scalable and decentralized mobile communications, and that designing mobility support outside the global routing system can o er an overall best tradeo as measured by flexibility, manageability, and scalability of the resulting systems.