Title :
Optimization of downlink power control based on LTE
Author :
Park, Chul ; Choi, Hong Seok
Author_Institution :
ETRI, Daejeon, South Korea
Abstract :
This paper presents a downlink power optimization scheme to improve LTE system performance in accordance with UE speed. Especially in railway wireless communication system, the speed of UE is very important factor because trains move so fast over 300km/h that usually downlink performance should be degraded. So the additional requirements for the high-speed railway mobile communication system besides commercial LTE system are needed. At the LTE Femtocell test-bed including HeNB, UE, fading simulator and some test equipment, downlink performance is tested with the PA parameter of downlink power control for several cases of UE speed. By analysis of the test result the optimum PA parameter can be found regarding UE speed. An adaptive downlink power control scheme is introduced to improve downlink performance in high speed mobile condition. According to the simulation result for the proposed scheme downlink throughput is increased by 6.2% in mobile environment considering LTE railway communication service.
Keywords :
Long Term Evolution; femtocellular radio; optimisation; power control; railway communication; telecommunication control; HeNB; LTE Femtocell test-bed; LTE railway communication service; LTE system performance; UE speed; adaptive downlink power control scheme; downlink performance; downlink power optimization scheme; downlink throughput; fading simulator; high speed mobile condition; high-speed railway mobile communication system; mobile environment; optimum PA parameter; railway wireless communication system; test equipment; Downlink; Fading; Mobile communication; Optimization; Power control; Rail transportation; Throughput; Downlink Power Control; Femto; LTE; Optimization; Performance; Railway;
Conference_Titel :
ICT Convergence (ICTC), 2012 International Conference on
Conference_Location :
Jeju Island
Print_ISBN :
978-1-4673-4829-4
Electronic_ISBN :
978-1-4673-4827-0
DOI :
10.1109/ICTC.2012.6387192