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Mobile messaging has become a trend in our daily lives. The current schema for messaging is to route all the messages between mobile users through a centralized server. This scheme, though reliable, creates very heavy load on the server. It is possible for users to communicate through peer-to-peer (P2P) connection, especially over urban networks characterized by heavy user traffic and dense network...
In this paper, we have proposed an efficient cluster based fault detection and recovery in MWSN. If the Cluster head (CH) turns to be a selfish or malicious node, then the system will fail to detect the fault and the subsequent recovery process. Hence identifying selfish or misbehaving CH is essential. At the same time, identifying faulty data from sensors is another important issue in data gathering...
With deploying heterogeneous communication devices with different kinds of access networks, it is one of the promising services to transfer an active session from one device to another. IETF SIP can provide the ubiquitous service regardless of underlying networks and device types. In this paper, we investigate two mainstream using SIP, IMS and P2PSIP, and propose interworking architecture to provide...
Recently, P2P file distribution systems including the BitTorrent are used for distributing open source software, e.g., BSD OS. IP address of downloaders relate to session disconnection in each downloader during the file transmission. Session disconnection with changing IP address will impact efficiency of the file distribution using TCP as a transport layer protocol. To avoid the issue, we consider...
A mobile cluster experiences disruption in execution of long-running applications because of its highly dynamic nature. Process migration is a solution for handling such dynamism to have seamless computing with minimal disruption. The challenge in process migration is that it should take considerably less time. This work is a novel effort at such a goal that employs a heap-based super P2P structure...
Mobile IP gives solutions to wireless applications to maintain the connectivity while handover is occurred. However, a remote home agent can result in poor efficiency. Dynamic home agent reassignment model is proposed to reduce both the signalling traffic and the data traffic to the home network. Therefore, it has to be assured that there are enough home agents available; otherwise, it is hardly to...
In the IPv4 network, a mobile node is expected to move between a global address network and a private address network during communication. We have already proposed a mobility mechanism that applies the principle of hole-punching, widely known as ??NAT traversal technology??, when a NAT exists on a communication path. It can realize mobility over different types of address areas. In this paper, we...
Mobile P2P media streaming is a very interesting research topic. We design a real P2P system based mobile simulation measurement platform. Based on the captured traces of PPStream, four aspects are reported: protocol blackouts, unavailable data (UD), performance of data fetching and sharing, and neighbor stability. A simple model is presented to analyze the UD in handover. According to the model,...
Wireless technologies are rapidly evolving and the users are demanding the possibility of changing its point of attachment to the Internet (i.e. default router) without breaking the IP communications. This can be achieved by using Mobile IP or NEMO, however mobile clients must forward its data packets through its Home Agent (HA) in order to communicate with its peers. This sub-optimal route (lack...
Mobile p2p is a more and more interested topic. In this paper, we discuss the factors that can cause uncertain problems for current p2p systems under mobile ip environment. A simulation mobile ip environment based on real network is proposed. After analyzing the p2p measurement requirements on mobile ip networks, we design and build a p2p system measurement platform under the simulation mobile ip...
We employ the publish/subscribe model in a P2P mobile tactical networking environment to offer an effective information dispatch service. Particularly, considering the requirements in mobile tactical networks, we investigate the problem of subscriber mobility management and propose a novel proactive handoff scheme to improve system responsiveness and reliability. Results from performance analysis...
Mobile peer-to-peer communication (mobile PPC) is a mobility protocol that enables mobility with only end nodes in an IPv4 network. It is assumed that a mobile node moves between a global network and a private network in the IPv4 network during communication. In the existing mobile PPC, communication cannot be maintained when a mobile node moves if a network address translator (NAT) exists on the...
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