On the impact of realistic control channel constraints in UTRAN LTE TDD system

This paper focuses on the Physical Downlink Control Channel (PDCCH) and describes the impact of its realistic constraints on the performance in E-UTRAN LTE TDD system, particularly considering the asymmetric slot resources between downlink and uplink. It is described, when adopting the same PDCCH manager framework in LTE FDD system as in LTE FDD system, the uplink users are not prioritized sufficiently regarding less uplink subframe under most of TDD UL/DL configurations. Therefore, it is proposed, the joint list in the PDCCH manager framework can be adjusted semi-statically to perfectly match TDD UL/DL configurations, and assuming ideal traffic monitoring this can furthermore provide more freedom and flexibility for wider range of UL/DL service requirement, without changing the overall TDD UL/DL configurations. The simulation results proved that the TDD-oriented PDCCH framework can satisfy UL/DL traffic requirement via exploiting the flexibility of joint list based on semi-statistically monitoring and adjustment.