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In this paper, we investigate the performance of two-way relay system with co-channel interference in a Rayleigh fading environment. Due to the mathematical intractability of original expression of signal-to-interference and noise ratio (SINR) induced by the bi-directional forwarding, a couple of effective bounds are derived for important performance(More)
With the impressive development of wireless devices and growth of mobile users, telecommunication operators are thirsty for understanding the characteristics of mobile network behavior. Based on the big data generated in the telecommunication networks, telecommunication operators are able to obtain substantial insights using big data analysis and computing(More)
Though cooperative relaying is believed to be a promising technology to improve the energy efficiency of cellular networks, the relays’ static power consumption might worsen the energy efficiency therefore can not be neglected. In this paper, we focus on whether and how the energy efficiency of cellular networks can be improved via relays. Based on the(More)
Practical mobile communication systems suffer from time-variant channel fading and co-channel interference, both of which give rise to challenges on strategy design and performance analysis in wireless relay networks. Although these two aspects have gained concerns in recent studies, most researchers still focused on dealing with single problem and avoided(More)
For opportunistic networks, we propose a new routing protocol named PPSW, which exploits the benefit of the polynomial interpolation prediction of mobile nodes positions. This scheme can deliver the message faster with appropriate opportunities. Specifically, in wait phase, relay can forward message to another one moving closer to destination, instead of(More)
Current satellite coverage architectures generally assumes uniform traffic distribution among all beams, giving rise to uniform beam coverage pattern along with equal beam bandwidth allocation. However, the uniform coverage is not suitable for the unbalanced traffic scenarios, e.g. the metropolis region and emergency communication during disaster, which is(More)
This paper investigates asymmetric two-way relay networks, where a pair of source nodes exchange data with the help of a relay node. Coded cooperation scheme using nonbinary LDPC codes is proposed for improving the performance of such networks. In our scheme, the relay transmits different length of parity check information with different modulation orders(More)
In this paper, we consider resource allocation with proportional fairness in the downlink orthogonal frequency division multiple access relay networks, in which relay nodes operate in decode-and-forward mode. A joint optimization problem is formulated for relay selection, subcarrier assignment and power allocation. Since the formulated primal problem is(More)