This paper explores the architecture and implementation details of SCOPE platform. SCOPE is our prototype for spontaneous P2P social networking. It provides customized social networking application for local use cases. Below the network level, SCOPE relies on 802.11 ad-hoc mode and needs no infrastructure. SCOPE follows the hierarchical P2P model. Some nodes with higher computing capability become supernodes. super-nodes form an overlay and provide the distributed data management system for the P2P social network. Client nodes (CNs) connect to super-nodes and rely on them for sharing their contents or accessing to the shared information. We have developed What's UP as our client agent tool which provide a vast range of applications from simple text/link sharing to P2P IP Telephony.
Abstract-This demo presents some features of our software for P2P social networking What's up 2.0. The main idea of What's Up 2.0 is to provide spontaneous social networks in the events such as conferences and expositions. With no infrastructure, What's up enables fast setup and deployment of a distributed social network that provides VoIP, instant messaging, Video call, community creation/management, V-card sharing, Image sharing, search and event alert. What's up 2.0 is designed to be also deployable on ad hoc networks. Moreover it works on different operating systems including windows, Linux, Windows mobile and Symbian.
Design of Handover mechanisms in converged wireless and wire-line networks where different access technologies overlap are challenging. As the first step, defining the handover criteria for selecting the best candidate among available accesses plays an important role for efficient use of network resources. Different parameters should be considered such as: QoS, load balancing factor and inter technology handover cost. For load balancing the goal is selecting an access technology for a client according to its active sessions in a manner that the set of overlapping accesses can admit the most number of clients. It does not always mean selecting the access with the most available resources. We define the handover criteria according to access characteristics, network load condition and end user preferences. We also consider distributing of different sessions belonging to one user over different access technologies as a new feature. We analyze the effect of our approach in efficient use of resources in different test scenarios. I.INTODUCTIONConvergence of wire-line and different wireless network technologies can bring out new services and capabilities such as unique numbering and running bandwidth consuming applications proposed in mobile domain via wire-line or WLAN accesses with better QoS and cheaper cost. In 3GPP Release 6, the work on interconnection of WLAN and 3G technologies started and the standardization is being continued in Release 7. In B3G, the network is supposed to be more heterogeneous supporting 2G, 3G, WLAN, WiMAX and Bluetooth. Moreover, for Next Generation Networks (NGN), ITU-T seeks for convergence of wireless and wire-line technologies. In all of 3G, B3G and NGN service-related functions are independent from underlying transport-related technologies by using 3GPP IP Multimedia Subsystem. IMS as an overlay on transport infrastructure provide convergent services for the users. However, Seamless mobility between hybrid technologies is a key feature. Different mobility management protocols developed in IETF like MIP, HMIP, Fast MIP and NETLMM approaches can be considered to support roaming and handover locally and globally [1][2][3][4][5]. However, regardless of the mobility management protocol, defining the criteria to select the best connection in handover or roaming time is critical: IMS is based on a model where a network operator and service provider control access to the network and services for which customers are billed. Therefore the handover/roaming criteria shouldn't focus only on selecting the connection with best QoS condition and should also consider the cost. Moreover conventional handover criteria used in homogenous networks, based on Received Signal Strength-RSS, firstly, are not able to choose the best access according to other QoS requirements of active sessions (bandwidth, delay …) of a user. And secondly with such simple criteria the resources of the hybrid network won't be used efficiently.Hence, four main goals should be referenced by mobility management systems to cope with t...
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