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为了提高移动通信系统中发射端的传输能效,该文提出了一种基于机会调度的组播方法,通过在保持发射功率不变的条件下减少满足所有组播用户服务质量(QoS)要求所需的发射时间来降低能耗。该方法首先利用正弦函数来模拟机会组播调度下用户的时隙级QoS限制,然后实时地根据各个用户对其时隙级QoS限制的满足程度优化不同时隙的组播速率。仿真结果表明:对于组播用户间平均信道条件相同或相差较少的场景,该方法在保证用户QoS要求的同时比已有组播调度方法降低了发射端的传输能耗。
In order to improve the transmission energy efficiency of transmitters in mobile communication systems, a multicast scheduling scheme based on opportunistic scheduling is proposed in this paper. By reducing the QoS requirements for all multicast users while keeping the transmit power unchanged, Launch time to reduce energy consumption. The method first uses the sine function to simulate the users’ slot-level QoS constraints in opportunistic multicast scheduling, and then optimizes the multicast rates in different slots according to the satisfaction degree of each user in the slot-level QoS constraints in real time. The simulation results show that this method can reduce the transmission energy consumption of the transmitting end compared with the existing multicast scheduling method while guaranteeing QoS requirements for users with the same or less average channel conditions among multicast users.