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In order to improve the spectrum utilization rate of Device-to-Device (D2D) communication, we study the hybrid resource allocation problem, which allows both the resource reuse and resource dedicated mode to work simultaneously. Meanwhile, multiple D2D devices are permitted to share uplink cellular resources with some designated cellular user equipment (CUE). Combined with the transmission requirement...
This paper considers the virtual cell(VC) association and multi cell scheduling in Ultra-Dense Network for sum-rate maximization where multi dimensional resources allocation strategy is coupled and interference environment is complex. For virtual cells association, a metric is proposed which is transformed from the non-convex problem via a series of decouples and captures the gain of multi user diversity...
Sparse code multiple access (SCMA) is a new modulation and non-orthogonal multiple access scheme for 5G systems, in which the coded bits are mapped to multidimensional sparse codewords, and the message passing algorithm (MPA) is employed to detect multi-user signals. Device-to-Device communications underlaying cellular network is also a key technique in 5G networks; hence the sparse codes allocation...
A cooperative bandwidth and power allocation algorithm is presented for multi-relay based networks. All the relays adopt the decode-and-forward protocol and assist the transmission from the source to destination in a non-cooperative game. By using a utility based mechanism, two types of resource allocation algorithms, namely bandwidth and power allocation strategy are proposed so as to maximize the...
A load balancing relay selection algorithm (LB-RS) is presented for relay based cellular networks. According to current user channel conditions as well as the user numbers that relay serves, LB-RS chooses the optimal relay node for each user in a distributed way. Simulation results demonstrate that compared with other relay selection schemes, LB-RS can achieve load balancing through effective relay...
Considering the new feature after introducing the relay nodes (RNs) into the conventional cellular networks and the existing interference coordination techniques, a novel method of interference coordination for cell-edge users in relay enhanced cells (RECs) is proposed in this paper. Firstly, all available frequency resource in each cell is divided into two parts. One part is allocated to users directly...
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