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The trust model is widely used in the opportunistic social network to solve the problem of malicious nodes and information flooding. The previous method judges whether the node is a cooperative node through the identity authentication, forwarding capability, or common social attribute of the destination node. In real applications, this information does not have integrity and does not take into account...
Cellular-based cooperative communication is a promising technique that allows cooperation among mobile devices not only to increase data throughput but also to improve localization services. For a certain number of cooperative nodes, the geometry plays a significant role in enhancing the accuracy of target. In this paper, a simple solution to the deployment of cooperative nodes aiming at the lowest...
In this paper, an error-prone cooperative retransmission strategy (E-CRS) is proposed for wireless networks. In E-CRS, when a receiver can not receive a frame correctly, the retransmission is performed by a cooperative node that overhears the packet successfully, rather than by original source. The throughput of the proposed scheme is analyzed and evaluated in error-prone and no collision channel...
The existing credit-based mechanisms mainly focus on stimulating the rational packet droppers to relay other nodes' packets, but they cannot identify the irrational packet droppers such as compromised or broken nodes, which has negative impact on the network performance. In this paper, we propose a credit-based mechanism that uses credits to stimulate the rational packet droppers to cooperate, and...
We consider the problem of precoding optimization for wireless MIMO nodes that are assigned both to serve its own destination and to relay another data transmission with a different destination. Unlike the traditional MIMO relay broadcast model, our cooperative node not only amplifies and relays another source signal to its destination but also sends its own information to another destination. Our...
A novel cooperative routing protocol, namely throughput-optimized cooperative routing (TOCR) protocol, is proposed to improve network throughput in ad hoc network. Through calculation, we can deduced that by fixed transmission power, a cooperative node can raise received signal to noise ratio (SNR) at the receiving of recipient node, and then increase the probability of successful packets reception...
In cooperative wireless networks, the source node transmits the packets to its destination with the help from the cooperative nodes. However, existing routing metrics in the literature do not take into account the cooperative gain in choosing the next hop in a multi-hop network. In this paper, we propose a new routing metric that accounts for the potential cooperative gain a candidate next hop may...
In this paper, a new distributed space-time code incorporating linear dispersion propriety used in cooperative diversity system is introduced. After a CRC detection, each cooperative node applies distinctive transmit method according to its CRC result. Based on PEP upper bound analysis, we deduce optimal power allocation for this system. Besides, theory analysis demonstrates that our proposed Distributed...
In this paper, we consider a novel spatial diversity scheme for a mutually cooperative relay (MCR) system in which two active users are simultaneously communicating with the same destination node. Integrating the existing rotation code into the MCR system, we now have a spatially coordinate-interleaved design (SCID), which inherits its diversity gain (with order of two) over the simple repetition...
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