VoLTE coverage improvement by HARQ and RLC Segmentation when TTI Bundling is ON
The 3GPP Long-Term-Evolution system applies pure packet-switch architecture.Meanwhile,the LTE radio access has a short Transmission Time Interval (TTI) of 1ms in order to reduce end-to-end delays.Such burst transmission cause major difficulty in voice transmission over LTE (VoLTE),especially for uplink transmission at the cell edge.TTI bundling has been proposed to enhance the coverage of VoLTE.In this paper we investigate the effect of conventional coverage enhancement technologies of HARQ and RLC segmentation on VoLTE when TTI bundling is applied.We consider the uplink transmission and the coverage capability is defined as the required signal power to successfully decode the voice packets.We build a simulation platform according to the 3GPP specifications.Conclusion and suggestion then are proposed to optimize a practical network.
VoLTE Coverage enhancement TTI bandling HARQ
Lei Cao Ye Zhao Qingyang Wang G.Du S.Xiong Taijie Luo F.Chen
Department of Technology,China Telecom Corporation Limited,Beijing,China Mobile Communication Research Division,Guangzhou Research Institute of China Telecom Guangzhou China School of Electronic and Information Engineering,South China University of Technology Guangzhou,Chin
国际会议
重庆
英文
371-375
2016-03-20（万方平台首次上网日期，不代表论文的发表时间）