We consider the wireless powered communications where users harvest energy from non-dedicated sources. The user follows a harvest-then-transmit protocol: in first phase of a slot time the source node harvests energy from a nearby conventional Access Point, then transmit information to its destination node or relay node in the second phase. We obtain the optimal harvesting ratio to maximize the ...

In this paper we investigate the relationship between local next hop selection strategies and their efficiency in terms of both link related metrics, such as the mean packet delivery fraction, and network related metrics, such as the energy status of the node elected as relay. In standard geographical forwarding algorithms the relay selection is usually carried out by means of advancements towa...

The paper proposes a deterministic node deployment method based on grid scan to achieve targets coverage and nodes connectivity. Target area is divided into girds from which the most suitable one is selected to place the next node. In the coverage phase, the grid where the sensor node can sense the most targets and have the best coverage level is selected to place the next sensor node. To make ...

This paper presents a low-density parity check(LDPC) coded multiple-input multipleoutput(MIMO) cooperative communication system with relay selection strategy. In the proposed cooperative network with multiple potential relays, we present selection cooperation to choose the best relay. We also present the outage probability analysis of this system. Furthermore, in the proposed architecture relay...

In linear wireless sensor networks (WSNs), when the available energy of a sensor node reduces to below a threshold level, the node will lose its function. The sensor energy consumed can be divided into energy of sensing event, energy of transmitting packets, and energy of receiving packets. In this paper, the node residual energy of a data flow in linear WSNs from source nodes and relay nodes i...

High latency, low data rate and intermittent network connectivity make Delay Tolerant Network (DTN) cannot copy routing protocols in traditional network. Because of node mobility, node cache limitations and energy, it is very difficult to select relay nodes. The paper proposed a Confidence Based Routing Algorithm (CBRA) that uses factor combination of message forward successful rate, contact ra...

We focus on mobile P2P multicast, in which mobile end nodes not only act as receivers but also relay the received stream forward to others. In mobile P2P multicast, negative effects caused by the change of available bandwidth and the disconnection of mobile nodes are propagated to the downstream nodes. To solve this problem, we developed a novel node-allocation framework using the multidimensio...