单个频率网络(SFN ) 能提供多媒体广播多点传送在一个大范围区域上的服务。然而, SFN 的申请被大量反馈仍然限制。因此,我们基于有限反馈建议一个 multicast 资源分配计划当保证服务(QoS ) 的质量得到即时服务的要求时,最大化全部的率。在这个计划,我们设计一个用户反馈控制算法有效地减少反馈负担。算法决定报告隧道应该说信息到哪个底驻扎用户。我们然后提出联合副载波和力量分配问题并且发现它有高复杂性。因此,我们首先在相等的力量的假设下面散布副载波并且开发比例的分配策略完成在公平和 QoS 之间的折衷。下次,反复的充满水的力量分配被建议充分利用有限力量。到进一步的减少复杂性,力量反复的计划被介绍。当减少 68% 反馈开销时,模拟结果证明建议计划显著地改进系统性能。另外,力量反复的策略由于低复杂性在实践是合适的。
The single frequency network (SFN) can provide a multimedia broadcast multicast service over a large coverage area. However, the application of SFN is still restricted by a large amount of feedback. Therefore, we propose a multicast resource allocation scheme based on limited feedback to maximize the total rate while guaranteeing the quality of service (QoS) require- ment of real-time services. In this scheme, we design a user feedback control algorithm to effectively reduce feedback load. The algorithm determines to which base stations the users should report channel state information. We then formulate a joint subcarrier and power allocation issue and find that it has high complexity. Hence, we first distribute subcarriers under the assumption of equal power and develop a proportional allocation strategy to achieve a tradeoff between fairness and QoS. Next, an iterative water-filling power allocation is proposed to fully utilize the limited power. To further decrease complexity, a power iterative scheme is introduced. Simulation results show that the proposed scheme significantly improves system performance while reducing 68% of the feedback overhead. In addition, the power iterative strategy is suitable in practice due to low complexity.