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Ina wireless ad hoc network, single-antenna nodes can cooperate in their transmissions to create a virtual multiple-input multiple-output (MIMO) channel for maximizing the spatial multiplexing gain. However, implementing virtual-MIMO transmission can result in overwhelming overhead, such as channel state information (CSI) feedback and local data exchange, as the number of cooperating nodes increases...
Due to the mobile networks experiencing heterogeneity and intricacy, many studies with efficient data off-loading have been considered. In this paper, we address the benefits of deploying movable caching nodes (e.g. mobile users, vehicles), namely VehiCaching (VC), in cellular networks. We classify the role of VC into two issues: 1) considering multiple access schemes between macrocell and VC for...
Mobile networks are experiencing heterogeneity and intricacy by the avalanche of data traffic, which bring about the possibility of performance degradation by strong interference problems. In order to overcome the limitation of mitigating/eliminating strong interferences, some recent researches have focused on harnessing interferences using advanced coding techniques such as network coding. Two-way...
Due to the tremendous growth of mobile data traffic, some technologies from small cell deployment are still ongoing as nominated solutions. Without enlarged wired backhaul capacity, however, the performance of small cell techniques are inevitably degraded. The approach employing the storage capacity in order to off-load the backhaul capacity, as known as femto-caching, has been proposed to minimize...
Mechanical Relay (McR) is an architecture to enable data communications, where transmission delay and intermittent service are tolerated. Since each source and destination user uploads/downloads data when McRs are located in transmission range, we obtain more significant sum-throughput gain than fixed/no relay networks even if some packet delay might be burden for delay-sensitive cases. In this paper,...
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