摘要
LTE-Advanced(LTE-A)系统中引入中继后,带来了如提高频谱效率、拓展网络覆盖等优点,但是中继的引入也给资源分配带来了更多的挑战。针对LTE-A中继系统的资源分配问题,提出一种在eNB和中继功率受限,且用户数据速率比例公平约束的条件下,以最大化平均用户数据速率为目标的动态资源分配机制。首先,平均分配功率,根据用户数据速率的比例公平约束,将资源块分配给用户;然后,通过Lagrange乘子法调整各个用户资源块上的功率。通过仿真验证表明,该算法能满足用户不同数据速率要求,又能提高平均用户数据速率。
Introducing relays in LTE-Advanced(LTE-A) system,brings lots of advantages,such as improving spectrum efficiency and ex panding network coverage etc.However,which bring more challenges for resource allocation after introducing relays.A dynamic resource allocation mechanism is proposed for LTE-A relay system.The objective is to maximize user average data rate with the eNB and relay pow er constraint,while guaranteeing proportional fairness of users.First the resource blocks is allocated to users under the proportional fairness constraint with equal power allocation.Then,the power allocation is implemented with Lagrange multiplier method for every user.Simula tion results show that the proposed algorithm can satisfy every user data rate requirements and improve performance.
出处
《电脑知识与技术（过刊）》
2012年第1X期453-457,共5页
Computer Knowledge and Technology
