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Widespread use of mobile terminal has promoted the rapid movements of information service technology. This paper analyzes the shortcomings of service capabilities in the case of the lack of infrastructure, and presents a service persistence method in mobile environment. Based on distributed service deployment, multiple backup and service session switch and other mechanisms, this method effectively...
With the advent of multiple radio interfaces on modern smart phones, simultaneous transmission and reception of data through via both mobile networks and WiFi networks has gained a considerable attention as a cost-effective means for mobile data offloading. In this paper, we present a practical SDN-based data offloading framework based on a Femto-WiFi Integrated network. The proposed framework take...
With the development of mobile network technology, HTTP mobile steaming is deployed by most of the video websites. Thus a lot of research works have been done on the Quality of experience (QoE) evaluation for HTTP mobile streaming. However, in most of them, only the factors in the network layer was considered, and the important information about user dissatisfaction with the video quality may be ignored...
4-G mobile communications system is offering high speed data communications technology having connectivity to all sorts of the networks including 2-G and 3-G mobile networks. Authentication of a mobile subscriber (MS) or a subnetwork and a main network are an important issue to check and minimize security threats or attacks. An advanced artificial intelligence based mutual authentication system applying...
Global research on B4G/5G is widely started. And software enabled wireless network evolution is largely impacted by IT industry — cloud computing, SDN, and CCN. However, most research on cellular network from academia is hard to deploy on real cellular network due to closed ecosystem and licensed spectrum. We propose an open source wireless switch as a research platform for B4G/5G network. Through...
An evaluation model that simulates a realistic trend of latency variation is attracting attention for use in simulation studies on large-scale distributed services provided through mobile networks. Therefore, we propose a new modeling method using a Markov regime switching which builds the evaluation model where latency drastically changes with time as in the mobile network. Furthermore, the effectiveness...
In a mobile environment, data broadcast paradigm has been recognised as an effective and scalable mechanism to disseminate frequently requested information to a large number of mobile users. This paper presents the design and implementation of a power preserving mobile broadcast system. The broadcast system is designed to serve transitive queries or queries that access related data items belonging...
With advancement in Location Based Service and GPS enabled mobile devices, different types of queries to obtain location based information exist in mobile environment. Location based queries or spatial queries are the backbone of Location Based Services. LBS is gaining more popularity in today's world, as they enable the mobile users to obtain location information or location based information. Spatial...
In this demonstration, we show our ongoing work called MOVi+ that extends MOVi (Mobile Opportunistic Video-on-demand) for improving the scalability in terms of number of mobile clients. By exploiting sustainable segment-based caching-enabled switch, MOVi+ increases the opportunity of peer-to-peer connectivity, which can eventually service more number of mobile clients than original MOVi with shorter...
Abstract: According to the mobility support characteristics and demands in the Identifier/Locator separation mapping network and aiming at the switching delay problem in the existing mobile switching technology, a seamless switching method based on reverse routing redirection is proposed in this paper. This method consists of the mobility detection, mapping information update and flow deflection,...
With the acceleration of network evolution to the packet-based all-IP network, a demand for the IMS which is defacto standard framework to provide IP services in the packet-based network, is increasing rapidly. Number Portability(NP) which has been contributing to facilitating of telephony company competition and increasing of user convenience in legacy circuit-based networks, is also becoming more...
In this paper, we discuss the functionality of mobile systems in a new generation network. Our goal is to provide mission-critical services using the mobile systems in the fields such as energy, disaster prevention, and medical care. It is necessary to guarantee both reliability and quality of communication for these services. We show that the future mobile systems should have three functions for...
Application migration is a promising technique to enable users of computational devices to continue a task even though the executing device changes. One key challenge to realise application migrations is to maintain the network sessions in case a network based application is migrated. This article presents a solution to maintain network sessions in application migration scenarios. We develop a prototype...
Aiming at moving aspect of heterogeneous wireless network, The paper puts forward a heterogeneous network mobile management mechanism- Identifiers Split Memory, Substitution Transmission Scheme ISMSTS, introduces the basic theory and the protocol process of ISMSTS detailed, and makes the performance analysis and the contrast with MIPv6 protocol. ISMSTS is the mobile management scheme based on the...
Economic development and globalization of trade make the cross-region communication more and more frequent. Multimedia conference system supports that individuals or organizations in different places share voice, video and documents to achieve real-time communication. However, the existing multimedia conference terminals lack mobility support. In this paper, we have designed and implemented a Symbian-based...
This paper presents a novel method, which dynamically switches sessions established by Universal Plug and Play (UPnP) and Session Initiation Protocol (SIP) to maintain the content delivery between digital network appliances when a user moves to/from home. UPnP is used when both appliances are in the home and SIP is used when at least one of them is outside. The proposed method targets session switching...
Mobility management is crucial for mobile networks to support certain quality of service (QoS) requirements. In this paper, we developed a flat network architecture rather than traditional two-layer mobility management architecture to reduce network elements and lighten networking load. Based on the proposed flat network structure the concept of separation of location and identity (Loc/ID), which...
Recent years have witnessed growing interest in using mobile devices to host services. The move from service consumer to service provider has been enabled by advances in mobile device hardware. Many contemporary devices also come equipped with multihoming, which allows a device to connect to heterogeneous networks, such as GPRS, WiFi and Bluetooth. To help leverage these new capabilities, we have...
Location-aware is becoming an important aspect of mobile computing. A core problem in location-aware service is the determination of physical location. For applications in open, outdoor areas, the Global Positioning System is a common choice. Although GPS offers near-worldwide coverage, its performance degrades indoors and in high-rise urban areas. By using signal strength, it is possible to locate...
This research is aimed at a smart music playing environment in which a set of speakers are placed in different locations/rooms and one of the speakers will automatically play a music whenever a user gets close to it. Our study is focused on the design and prototype implementation of such a smart music playing system called U-LAMP (User Location-Aware Music Player). It consists of a server that stores...
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