Title: Small Cells Deployment in 4G/5G Wireless Access
NetworksSpeaker: Professor Jie Zhang, University of Sheffield,
UKDate：9:00 a.m., September 17, 2012 Place：Lecture Room on
Abstract: Since 2004, the rapid development of smart phones and
tablet PCs has promoted the rapid growth of data traffic. It has been
predicted that the annual compound growth rate of the data traffic can
be up to 60% ~ 100%, and this trend will continue until at least 2020.
This implies that the traffic load over wireless networks in 2020 will
be 1,000 times of that in 2010, which brings great challenges in mobile
application services. To address the challenges, it is critical for
service operators to improve the spectrum efficiency and reduce the
energy consumption in existing macro-cell wireless networks. This talk
will first introduce several approaches for network capacity
improvement, including spectrum efficiency maximization, end-to-end
communication, etc. Then, more emphasis will be focused on small cell
dense deployment, which is one of the most effective approaches to
handling the exponential growth of traffic loads. Simulation results
will be presented to show the interference in small-cell systems,
corresponding outage probability and network capacity, in both indoor
and outdoor environments. The talk will also discuss, in order to deploy
the small cell system, why we need to redesign the existing radio
resource management algorithms, network architectures, etc. Finally, it
is pointed out that a combination of optical and wireless networks will
be the most natural way to address the challenges of data traffic
growth, and more than 90% 4G/5G networks will be based on a “ FTTx+radio
JIE ZHANG is currently a professor in the Department of Electronic
and Electrical Engineering, University of Sheffield, UK. He received his
M. Eng. and Ph.D. degrees from the Department of Automatic Control and
Electronic Engineering, East China University of Science and Technology,
Shanghai, China. He was a postdoctoral research fellow in University
College London and Oxford University in UK from 1997 to 2001. Prof.
Zhang is now a “Thousand Talents Program” expert.
Research interests of Prof. Zhang focus on wireless communication
network optimization, including indoor/outdoor wireless channel
modeling, femtocell networks, ad hoc networks, etc. His work has been
sponsored by UK EPSRC, 6th/7th Framework Program, etc. Prof. Zhang has
also been serving as the reviewer for EPSRC and 6th/7th Framework
Program proposals. Prof. Zhang has published more than 100 academic
papers since 2006 in top-tiered international journals. Prof. Zhang is
also the co-founder of two IT companies, Ranplan Wireless Network Design
Ltd in UK and its branch in China , both focusing on product development
related to wireless network optimization.
University of Sheffield: University of Sheffield is one of the best
engineering colleges in UK , and its EEE discipline ranks top 5 in UK.
The university ranks between 69 and 88 according the ranking of Shanghai
Jiaotong University and other rankings in past years.