Title :
Power synergy to enhance DCI reliability for OFDM-based mobile system optimization
Author :
Min Chen ; Anpeng Huang ; Linzhen Xie
Author_Institution :
Sch. of Electron. Eng. & Comput. Sci., Peking Univ., Beijing, China
Abstract :
In Orthogonal Frequency Division Multiplexing (OFDM)-based mobile networks (e.g., Long Term Evolution Advanced), Downlink Control Information (DCI) in a Physical Downlink Control Channel (PDCCH) plays a unique role in carrying control signaling and scheduling information, which enables the flexibility and diversity of radio resource utilization. Due to system configuration limitations, power dimension is the only potential to enhance DCI reliability. Based on this motivation, we apply the synergy concept to power dimension: called Power Synergy, which can deal with negative effects caused by Cell-specific Reference Signal (CRS) power boosting, and also allow flexibly power lending between OFDM symbols in the physical control region. Under the constraints of the Block Error Rate (BLER) threshold 102 given for PDCCHs and the CRS full-cell coverage requirement, performance tests reveal there are significant profits (for example, 10-dB gain available for enhancing DCI reliability in the worst case) from the power headroom in the physical control region. This valuable gain is helpful to accommodate emerging mobile broadband services (e.g., mobile health) in LTE/LTE-A networks.
Keywords :
Long Term Evolution; OFDM modulation; cellular radio; diversity reception; error statistics; mobile radio; optimisation; radio networks; telecommunication network reliability; telecommunication scheduling; telecommunication signalling; wireless channels; BLER; CRS full-cell coverage requirement; DCI reliability enhancement; LTE network; LTE-A network; Long Term Evolution-Advanced network; OFDM-based mobile system optimization; PDCCH; block error rate; cell-specific reference signal power boosting; control scheduling information; control signaling information; downlink control information; orthogonal frequency division multiplexing; physical control region; physical downlink control channel; power headroom; power lending; power synergy; radio resource utilization diversity; radio resource utilization flexibility; Boosting; Downlink; Mobile communication; Mobile computing; OFDM; Power demand; Reliability; Cell-specific Reference Signal (CRS); Downlink Control Information (DCI); Physical Downlink Control Channel (PDCCH); Power Boosting; Power Synergy;
Conference_Titel :
Global Communications Conference (GLOBECOM), 2014 IEEE
Conference_Location :
Austin, TX
DOI :
10.1109/GLOCOM.2014.7037577
