Topic：Small Cell Deployment in 4G/5G Radio

Time：2013年9月18日（周三）上午10:00-11:30

Venue：信电大楼-225学术会议室

Speaker：Professor Jie Zhang

                  The Communications Group

                  The Dept. of EEE

                  University of Sheffield, Sheffield, UK

Biography

JIE ZHANG is a full professor and holds the Chair in Wireless Systems at the Communications Group, the EEE Dept, University of Sheffield, UK. His research interests are focused on radio propagation, indoor-outdoor radio network planning and optimisation, small/femto cell and self-organising network (SON). Since 2006, he has been an Investigator of over 20 research projects worth over 17 million GBP (his share is over £5.0 Million within his university group) by the EPSRC, the EC FP6/FP7 and the industries etc. He and his colleagues published the first two papers on OFDMA femtocell, one of the most widely cited femtocell papers "OFDMA femtocells: A roadmap on interference avoidance" (currently ranked at No. 1 among over 1500 femto technical papers apart from a survey paper) and some early work in femtocell self-organisation.He is one of the investigators of UK-China Science Bridge project on 4G/B4G Mobile Communications and EPSRC/Mobile VCE “Green Radio” project (probably the earliest green communication project in the world). He co-founded RANPLAN Wireless Network Design Ltd. (www.ranplan.co.uk) that produces the world leading in-building network design and optimisation tool iBuildNet® and RRPS (Ranplan Radio Propagation Simulator), which are well suited to study femto/small cell deployment and heterogeneous networks.He received PhD in Industrial Automation from East China University of Science and Technology (www.ecust.edu.cn) in 1995. From 1997 to 2001, he was a postdoctoral Research Fellow with Imperial College London and Oxford University. He joined U. of Bedfordshire as a Senior Lecturer in 2002, becoming Reader in Wireless Communications and Professor of Wireless Communications and Networks in 2005 and 2006 respectively.

Abstract

In recent years, mobile operators have experienced exponential data traffic growth. It is predicted that this trend will continue in the next five to ten years with an estimated CAGR of 0.6 to 1.0. Hence, the traffic (mostly data) carried by a mobile operator’s network in 2020 could be over 1000 times of that in 2010. This exponential traffic growth presents a huge challenge to the mobile industry. On top of meeting this traffic increase, operators have obligations to cut energy consumptions, which normally compromise spectrum efficiency in macrocell scenarios. In this talk, the speaker will first examine the possible contributions from increased spectrum efficiency, spectrum bandwidth expansion, traffic offloading and device to device communications, and then he will focus on dense small cell deployment, one of the most promising ways to meet the exponential traffic growth, in outdoor and indoor scenarios. Some of the early work in femtocell done by the speaker and his colleagues will be presented. Next, he will highlight why the dense small cell deployment calls for the re-designing of traditionally macrocell-oriented algorithms (e.g., interference co-ordination, user detection, MM and RRM) and the integration of wireless networks with their operating environments that could be designed to have desirable radio properties. The talk will conclude that the integration of fibre and wireless networks (both cellular and WiFi) is the best way to meet the challenge, and over 95% of 4G/B4G cells (e.g., LTE-Advanced and Beyond LTE-Advanced) will take the form of “FTTx + radio head”.