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The emergence of 5G wireless communication calls for new paradigms to satisfy the individuation and diversification of users' demands. In this paper, we construct the multicast groups under the guidance of user interest and then allocate the subcarriers and power to these groups in orthogonal frequency division multiple (OFDM) networks. Specifically, in order to maximize the social utility related...
In this paper, device-to-device (D2D) communication is integrated into cooperative multicast to elevate the multicast transmission rate from base station to users. To this end, a new optimization problem, aiming to maximize the overall cooperative multicast rate, is formulated with two essential features 1) D2D communication is exploited to accomplish the data forwarding in the second phase of cooperative...
In this paper, the power allocation problem is investigated with min-rate guarantee in OFDM-based cognitive radio (CR) system, which is formulated as maximizing the weighted capacity under the total-power, sum-interference, and min-rate constraints. Although the problem can be equivalently transformed into a convex one, and be solved by using the standard software packages, the computational complexity...
An adaptive subcarriers nulling power allocation algorithm for OFDM-based cognitive radio (CR) network was proposed to maximize the total capacity of CR users, with constraints on sum transmit power and the interference introduced to individual primary user on its allocated frequency band. The proposed algorithm considering both CR users' channel states and the interference to primary users (PUs)...
In this paper, we investigate the power allocation for spectrum sharing with constraints of energy consumption in a fixed period. The proposed online power auction is designed according to the pricing discipline of non-cooperative game. Though avoiding abusing energy while interference is great at some time steps, the regret of online power auction (OPA) is acceptable. Numerical results showed that...
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