Abstract
In Long Term Evolution-Advanced (LTE-A) networks, Device-to-device (D2D) communications can be utilized to enhance the performance of multicast services by leveraging D2D relays to serve nodes with worse channel conditions within a cluster. For traditional D2D relay schemes, D2D links with poor channel condition may be the bottleneck of system sum data rate. In this paper, to optimize the throughput of D2D communications, we introduce an iterative combinatorial auction algorithm for efficient D2D relay selection. In combinatorial auctions, the User Equipments (UEs) that fails to correctly receive multicast data from eNodeB (eNB) are viewed as bidders that compete for D2D relays, while the eNB is treated as the auctioneer. We also give properties of convergency and low-complexity and present numerical simulations to verify the efficiency of the proposed algorithm.
Highlights
The standard solution for supporting multicast services in Long Term Evolution-Advanced (LTE-A)networks suffers from severe inefficiencies [1], as the conventional cellular multicast performance is Algorithms 2015, 8 strictly bounded by the user with the poorest channel conditions
D2D communication is about enabling direct flow of data among User Equipments (UEs) in close proximity, it holds merit of data offloading for the eNodeB, improving spectrum efficiency, and increasing system capacity [2,3,4], etc
We study an effective D2D relay selection for multicast services to further improve system efficiency based on the iterative combinatorial auction (CA)
Summary
The standard solution for supporting multicast services in Long Term Evolution-Advanced (LTE-A). In D2D-assisted networks, UEs with good channel conditions are enabled to act as relays to communicate the received multicast data from the eNB to the remaining UEs via D2D links, such that the eNB can multicast at a high data rate and the transmission efficiency is improved. Based on this idea, in [5] the authors proposed a cooperative multicast transmission scheme, i.e., in which all successful multicast recipients participate in D2D relay transmissions by broadcasting their received data on the same resource.
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