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Caching at mobile devices can facilitate device-to-device (D2D) communications, which may significantly improve spectrum efficiency and alleviate the heavy burden on backhaul links. However, most previous works ignored user mobility, thus having limited practical applications. In this paper, we take advantage of the user mobility pattern by the inter-contact times between different users, and propose...
Nowadays, real-time video applications on portable devices became more and more popular. In this paper, we propose a novel joint computation-rate-distortion optimization algorithm for H.264/AVC-based wireless video communications through handheld devices under power constraint. Firstly, we propose a computation resources (CR) allocation model, which is based on virtual computation resources buffer...
In this paper, we propose a novel complexity-adjustable video coding algorithm for H.264/AVC-based wireless video communications through portable devices. To optimize the rate-distortion performance under power constraint in packet loss environment, we present a novel model that can adapt to the different channel conditions and computation power constraints. The experimental results demonstrate that...
A new resource allocation scheme for cooperative transmission over multiuser OFDM networks is proposed in this paper. It is assumed that each user has the ability to relay information for others to improve the overall system performance, operating in decode-and-forward (DF) mode. Sub-carriers and power are allocated to users to maximize the uplink system throughput under the constraints of half-duplex,...
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