电信科学 ›› 2012, Vol. 28 ›› Issue (3): 87-90.doi: 10.3969/j.issn.1000-0801.2012.03.023

• 研究与开发 • 上一篇    下一篇

LTE系统中PDCCH资源分配算法的研究

李小文,贾海峰   

  1. 重庆邮电大学重庆市移动通信技术重点实验室 重庆 400065
  • 出版日期:2012-03-15 发布日期:2012-03-15
  • 基金资助:
    国家高新技术研究发展计划基金资助项目;国家高新技术研究发展计划基金资助项目;江苏省普通高校研究生科研创新计划基金资助项目

Research of Resource Allocation for PDCCH Used in LTE

Xiaowen Li,Haifeng Jia   

  1. Chongqing Key Lab of Mobile Communications,Chongqing University of Posts and Telecommunications(CQUPT),Chongqing 400065,China
  • Online:2012-03-15 Published:2012-03-15

摘要:

为了降低LTE系统中PDCCH(physical downlink control channel,物理下行控制信道)的阻塞率,提高控制信道的资源利用率,本文通过研究目前的两种资源分配算法,结合两者优点提出了一种改进后的算法。该算法首先根据CQI(channel quality indicator,信道质量指示)确定CCE(control channel element,控制信道粒子)聚合等级,并进行资源分配,计算可能的聚合等级集合,在首次不成功的情况下,在可能的聚合等级集合中选取下次使用的等级,直到分配成功或遍历所有集合中的等级。仿真结果表明,改进后的算法提高了资源利用率,并相对降低了阻塞率。

关键词: 长期演进, 物理下行控制信道, 控制信道元素, 盲检测, 搜索空间

Abstract:

In order to reduce the blocking probability and improve the control channel resource utilization in LTE PDCCH,this paper studies two kinds of resources allocation algorithm,proposes a modified algorithm by combining with the advantages.This algorithm based on CQI to determine the CCE aggregation level,calculating the aggregate level set that may be used,if unsuccessful in the first case,selectes the next level in the aggregation level set,until the allocation succeeds,or through all the set level.By comparing the simulation results,the modified algorithm can improve the resource utilization,and relatively reduce the blocking probability.

Key words: LTE, PDCCH, CCE, blind detection, search space

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