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Mobility protocols are originally proposed to support ongoing Internet connectivity of hosts or networks in motion. However, the requirement of seamless connectivity in mobile environment and use of route optimization between the communicating nodes have introduced several security vulnerabilities to mobility protocols. In this paper, we explain with illustrative examples major security threats on...
This document provides detail on the implementation of a location awareness system which gives the user's current location, sends this location using SMS (Short Message Service) plus sharing location with friends and family and view them on Google maps. Users can also take benefit of this application in emergency situations by using emergency feature of this application. To get the location coordinates,...
Wireless mesh networking (WMN) is an economic means to provide the last-mile Internet access service through ad hoc peer-to-peer communication links. However, WMNs suffer from scalability, performance degradation and service disruption issues due to inherent network mobility. In this paper, we present a mobility management protocol, called HDR (Hierarchical Directory Resolution), using a hierarchical...
Inter-technology handoff is a complex process that involves several procedures including resource management, mobility management, and security functions. These procedures increase the handoff delay as the involved signaling occurs between different administrative domains. Hence, seamless handoff across different access technologies is conditioned on developing efficient architectures and mechanisms...
The paper is about mobile Stream Control Transmission Protocol (mSCTP) and the problems related to simultaneous mobility. Simultaneous mobility is when the both endpoints of a communication session are mobile and they move at about the same time. mSCTP works well in the case of non-simultaneous mobility where the SCTP association is established between a mobile endpoint and a stationary one. In the...
In this paper, we propose a Seamless and Secure service Framework (SSF) which guarantees secure association between user's terminal and safety critical system such as payment gateway by exploiting both user information and network information. Despite the leaks of personal sensitive information, SSF provides very safe service environment in wired and wireless convergence network that vertical handover...
In this paper, we introduce a delay-sensitive service that involves transmitting large amounts of location-based data to nodes at multiple locations. Given a limited amount of access points (APs) and an abundance of service requests that result from the nodes moving around, a typical content delivery service would inevitably introduce considerable delay. To solve this problem, we analyze the movement...
Broadband Video Streaming (BVS) with selective retransmission trades a reduced but acceptable video quality during IEEE 802.16e hard handoff (HHO) for improved end-to-end latencies. Both forms of BVS promise better video quality with an HHO than UDP transport or traditional congestion-controlled streaming.
In this paper, we propose L3 handover scheme using SIP messages to minimize handover latency and packet loss in a MN with single interface. Packet loss and handover latency arise from L2/L3 association delay and IP configuration delay when the MN transfers internet connectivity from the serving access router to the target access router using legacy terminal mobility mechanisms. Therefore, seamless...
In the absence of any formal mechanism to analyze the dynamics of handoff systems, it is difficult to predict or verify the systems performance of un-optimized handover or any specific handoff optimization technique. Without an existing mobility system model, it is difficult to design a new customized mobility protocol or design new optimization techniques for an existing mobility protocol in a systematic...
This paper describes a location-based services prototype that has been developed based on IMS and LOCSIP. The paper provides a brief overview of the prototype's capabilities, and illustrates how it has been used for rapid development of extended network services supporting first-responders in an emergency. Interoperability testing is discussed, and a set of lessons learned are presented.
Representation of indoor 3D location tracking had been an advantage to globally supported to track the mobile unit everywhere, even in different level of building. Our main focus is presenting development of indoor 3D location tracking to replace the existing 2D location tracking. The 2D location tracking mechanism only supports tracking the mobile unit position in the same level and provides handover...
One main objective of this paper is to propose novel mechanisms to support low latency handover at authentication level using network selection, security context management and mobility and handover management in future telecom ecosystem to allow ubiquitous access to the Internet and services to any individual on the move. This access should be possible anytime anywhere while ensuring the right level...
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...
Mobile video service is emerging as an attractive service, on basis of the successful IPTV commercialization and recent incredible smart-phone penetration to the mobile market. However, the lack of QoE/QoS monitoring mechanism will be a major obstacle for wider acceptance. In this paper, we present a QoE/QoS monitoring scheme, extending OMA-DM protocol and streaming QoE parameters. The design and...
Many of position-based routing protocols assume that a location service is available which provides location information on the nodes in the network. H2SaLAM uses a dynamic hierarchy between location servers. SHGRID using one hop chain technique has prevented decreasing of data delivery rate and it has increased the delay experienced by data packets. All of methods use location prediction method,...
Application Layer Multicast (ALM) has become a popular form of content distribution. It shows some favourable properties like inherent scalability and the overcoming of the traditional client-server bottleneck. In the future, a large fraction of the participants in ALM systems will be mobile (eg. smart-phones or netbooks) and demand for a proper inclusion and mobility handling. After analyzing current...
Networking has experienced tremendous changes. Once dedicated to one single type of services, technologies are now offering integrated services: we want to have access to any services anywhere. One challenge is the mobility, with 3G terrestrial offers beginning to be successful. In such a context, satellite systems appear as a real opportunity since they may fill the gap between dense connected areas...
We consider small cell networks and study the impact of user mobility. Assuming Poisson call arrivals at random positions with random velocities, we discuss the characterization of handovers at the boundaries. We derive explicit expressions for call block and call drop probabilities using tools from spatial queuing theory. We also derive expressions for the average virtual server held up time. These...
The importance of mobility in networks is being increased together with its number of users and applications. However, we still do not have broadly accepted solutions for mobility in Internet or other type of networks. In particular, mobility is difficult in heterogeneous networks, where heterogeneity could expand over ownership, administration, technology, and so on. We propose for such heterogeneous...
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