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The IP Multimedia Subsystem (IMS) aims to provide cellular access to all the services that the Internet offers; it is an overlay control layer on top of an IP layer. Wireless Sensor Networks (WSN) with mobile sinks are useful in a wide range of scenarios since they can improve the overall network lifetime and increase data capacity. Combining the capabilities of IMS with the rich set of contextual...
It is expected that Peer-to-Peer (P2P) services will co-exist with the client-server based services such as IMS. Mobile users may subscribe to the traditional wireless cellular services while participating in P2P overlay networks. In this paper, a method is proposed to reduce the signaling overhead in a mobile P2P system. With the help of the underlying infrastructure, a mobile device in the P2P overlay...
Mobility support has been on the list of most expected features of future Internet for a long period. Both Internet users and content providers look forward to the deployment of Internet mobility support, but none of proposed solutions has been adopted in large scale due to various impediments. In order to assist future researches on this urgent topic, we discuss the origin and fundamental requirement...
Peer-to-peer content-distribution networks are nowadays highly popular among users that have stationary computers with high-bandwidth Internet connections. Mobile devices (e.g. cell phones) that are connected to the Internet via cellular-radio networks, however, could not yet be launched into this field to a satisfactory extent. Although most mobile devices have the necessary hardware resources for...
Users in peer-to-peer (P2P) content sharing can share their content by contributing their own resources to one another. However, since there is no incentive for contributing contents or resources to others, users may attempt to obtain content without any contribution. To motivate users to contribute their resources to the service, incentive-rewarding mechanisms have been proposed. On the other hand,...
The Internet has encouraged increasing research in to mobile-to-mobile (M2M) communications and multimedia streaming. However, with respect to mobile networks, little research is specific to M2M multimedia streaming using the Internet protocol (IP), thus neglecting this glittering prospect. This paper compares both simulation and empirical performance of IP-based M2M video streaming over a typically...
This paper studies various techniques to overcome the barriers that firewalls and NATs cause to peer-to-peer connectivity. In the mobile context firewalls and NATs are typically managed by the mobile operator and are thus beyond the control of the mobile user. Therefore the focus of this paper is on techniques that take advantage of known behaviors of NATs and firewalls. Instead of studying how to...
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