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Multiview video is essential for various mobile three-dimensional (3D) and immersive applications that can capture scenes from multiple angles for better user experience. However, robust transmission of multiview video is very challenging in wireless networks due to high bandwidth requirement and time-varying channel quality. Though the up-to-date 802.11 system enables spatial multiplexing MIMO to...
Large-scale MU-MIMO is a promising technology to scale network capacity and the capacity gain grows linearly with the numbers of antennas and users in theory. However, its practical deployment faces three critical challenges in the state-of-the-art WLANs: i) the demand of a large number of expensive RF chains; ii) the linear growth of feedback overheads with the number of antennas; iii) the lack of...
The technique of massive multiple-input multiple-output (MIMO) in 5G cellular systems could greatly increase the cell coverage size and boost the signal-to-noise power ratio (SNR) for cell-edge UE. However, the suitable beam acquisition for the target cell during handover procedure would greatly increase handover latency and cause service interruption. This paper proposes an enhanced automatic neighbor...
Multi-view video streaming is essential for various mobile 3D and immersive applications that can capture the same scene from multiple angles. However, the large traffic volume of multi-view streaming will drain the battery power quickly. This paper studies the power efficient delivery of 3D content with multi-view video coding (MVC) in the emerging 802.11-like MIMO wireless systems, and the purpose...
Massive multiple-input multiple-output (MIMO) is a promising technology in the next 5G communications. Directly merging massive MIMO with cloud radio access network (C-RAN) systems will cause disastrous link data overload, which greatly exceeds the limitation of current 4G wireless standards. To solve this problem, we propose a pre-filtering C-RAN architecture in this paper to compress the inter connection...
With increased radio frequency (RF) chains, base station (BS) with multiple antennas consumes more circuit power. Turning off RF chains will help to save energy. However, in turn, it needs more sophisticated user scheduling. Therefore, an energy-efficient scheduling scheme is proposed with which users and RF chains are jointly selected at each frame. Here, Lyapunov drift-plus-penalty ratio is used...
In this paper, the throughput performance of uplink Base Station (BS) cooperation in a realistic multi-cell MIMO system is evaluated. We choose LTE Release 8 as our baseline, and propose a whole implementation scheme for uplink BS cooperation. First we propose a dynamic cooperative BS selection algorithm, in which each cell-edge user will be assigned a potential cooperative BS by comparing the reception...
Energy saving is a very important design consideration in wireless sensor networks. In cluster based wireless sensor networks, the energy could be saved when the nodes in a cluster that have data to transmit participate in cooperative Multiple Input Multiple Output (MIMO). In this paper, by making the idle nodes, that have no data to transmit, participate in the cooperative MIMO it is found that much...
Wireless ad hoc networks have been employed in pervasive computing, rescue and so on. Employing MIMO spatial multiplexing in ad hoc networks, multiple links in the same neighborhood could coexist and multiple RTS/CTS contention slots are required to contest medium. The RTS/CTS contention is a severe overhead that mitigates the performance improvement. The transmission power, which determines the number...
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