First International Workshop on C-RAN

Research Article

Analysis of Handover Performance Improvement in Cloud-RAN Architecture

  • @INPROCEEDINGS{10.1109/ChinaCom.2012.6417603,
        author={Liang Liu and Feng Yang and Richard Wang and Zhenning Shi and Alan Stidwell and Daqing Gu},
        title={Analysis of Handover Performance Improvement in Cloud-RAN Architecture},
        proceedings={First International Workshop on C-RAN},
        keywords={c-ran handover rrh/bbus procedure},
  • Liang Liu
    Feng Yang
    Richard Wang
    Zhenning Shi
    Alan Stidwell
    Daqing Gu
    Year: 2013
    Analysis of Handover Performance Improvement in Cloud-RAN Architecture
    DOI: 10.1109/ChinaCom.2012.6417603
Liang Liu1,*, Feng Yang1, Richard Wang1, Zhenning Shi1, Alan Stidwell2, Daqing Gu1
  • 1: Orange Labs
  • 2: Orange Labs UK
*Contact email:


With the surge of mobile internet traffic, Cloud RAN (C-RAN) becomes an innovative architecture to help mobile operators maintain profitability and financial growth as well as to provide better services to the With BBU centralization in C-RAN, handover, the most important feature for mobile communications, could achieve simplified procedure or improved performance. In this paper, we analyze the handover performance of C-RAN over a baseline decentralized RAN (D-RAN) for GSM, UMTS and LTE systems. The results indicate that, lower total average handover interrupt time could be achieved in GSM thanks to the synchronous nature of handovers in C-RAN. For UMTS, inter-NodeB soft handover in D-RAN would become intra-pool softer handover in C-RAN. This brings some gains in terms of reduced signalling, less Iub transport bearer setup and reduced transport bandwidth requirement. For LTE X2-based inter-eNB handover, C-RAN could reduce the handover delay and to a large extent eliminate the risk of UE losing its connection with the serving cell while still waiting for the handover command, which in turn decrease the handover failure rate.