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This paper analyzes the optimal resource allocation for multi-D2D(Device-to-Device) links underlying OFDMA-based networks with the target of reaching maximum sum-throughput of D2D transmission. In order to guarantee QoS (Quality of Service) of cellular users, the rate loss of cellular users is limited by a lower-bound constraint RLC. Meanwhile, the D2D link is allowed to use a sub-carrier only when...
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