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