Research of Resource Allocation for the LTE Physical Downlink Control Channel

Abstract

The Long Term Evolution (LTE) is just one of the latest steps in an advancing series of mobile telecommunications systems. There users or UEs (User Equipment) will share the uplink and downlink radio resources, in each frame, the Evolved NodeB (eNodeB) must signal which UEs are being allocated data. In the case of the LTE system, this signaling is performed over the Physical Downlink Control Channel (PDCCH). The amount of resources allocated to the PDCCH can be changed. Two issues must be addressed, the determination of the number of resources to be allocated to the PDCCH and, given this allocation, how should UEs be efficiently signaled over the PDCCH. In this paper, based on two kinds of resources allocation, and combining with the advantages of both, we propose a simple but near optimal algorithm for making PDCCH allocations within the subset of resources reserved for its use. We then illustrate, through simulation, the effectiveness of the approach.