TY - JOUR
T1 - Three-Stage DRX Scheduling for Joint Downlink Transmission in C-RAN
AU - Liang, Jia Ming
AU - Hsu, Ching Kuo
AU - Chen, Jen-Jee
AU - Wu, Kun Ru
AU - Tseng, Yu Chee
N1 - Publisher Copyright:
© 2012 IEEE.
PY - 2020/2
Y1 - 2020/2
N2 - Cloud-RAN (C-RAN) is a promising network architecture to provide 5G broadband services. In C-RAN, the base stations (BSs) are separated as the computation entities (i.e., Baseband Units (BBUs)) and the radio entities (i.e., Remote Radio Heads (RRHs)), where the BBUs are put in a centralized cloud to realize centrally control and the RRH are left at cell sites for signal transmission. With C-RAN, multiple collaborative cells can transmit data to user equipments (UEs) by Joint Transmission (JT) technology to improve network efficiency. On the other hand, 3GPP standard has defined the Discontinuous Reception (DRX) mechanism, which allows UEs to turn off their radio interfaces periodically to save their energy. However, how to cooperate DRX with JT under the C-RAN architecture is still an open issue. Therefore, this letter studies how to optimize UEs' DRX parameters while considering their quality-of-service (QoS) in C-RAN with JT. To solve this problem, we propose an energy-efficient JT scheduling scheme. The main idea of our scheme is to well pair UEs and BSs with the consideration of joint transmission quality and then optimizes DRX parameters to further save energy. Extensive simulation results show that our scheme can improve system throughput, well utilize resource and save UEs' energy consumption.
AB - Cloud-RAN (C-RAN) is a promising network architecture to provide 5G broadband services. In C-RAN, the base stations (BSs) are separated as the computation entities (i.e., Baseband Units (BBUs)) and the radio entities (i.e., Remote Radio Heads (RRHs)), where the BBUs are put in a centralized cloud to realize centrally control and the RRH are left at cell sites for signal transmission. With C-RAN, multiple collaborative cells can transmit data to user equipments (UEs) by Joint Transmission (JT) technology to improve network efficiency. On the other hand, 3GPP standard has defined the Discontinuous Reception (DRX) mechanism, which allows UEs to turn off their radio interfaces periodically to save their energy. However, how to cooperate DRX with JT under the C-RAN architecture is still an open issue. Therefore, this letter studies how to optimize UEs' DRX parameters while considering their quality-of-service (QoS) in C-RAN with JT. To solve this problem, we propose an energy-efficient JT scheduling scheme. The main idea of our scheme is to well pair UEs and BSs with the consideration of joint transmission quality and then optimizes DRX parameters to further save energy. Extensive simulation results show that our scheme can improve system throughput, well utilize resource and save UEs' energy consumption.
KW - 5G mobile system
KW - cloud radio access networks (C-RAN)
KW - discontinuous reception (DRX)
KW - joint transmission (JT)
KW - sleep scheduling
UR - http://www.scopus.com/inward/record.url?scp=85079681512&partnerID=8YFLogxK
U2 - 10.1109/LWC.2019.2943471
DO - 10.1109/LWC.2019.2943471
M3 - Article
AN - SCOPUS:85079681512
SN - 2162-2337
VL - 9
SP - 129
EP - 133
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 2
M1 - 8847450
ER -