Heterogeneous Networks in Mobile System Evolution

Wednesday, April 11th, 2012 at 6:30 PM

TI Auditorium


6:00 - 6:30 PM Networking & Refreshments
6:30 - 6:35 PM Chair's opening remarks
6:35 - 8:15 PM Speaker Presentations
8:15 - 8:30 PM Panel Session
8:30 PM Wrap Up

Chair: Narasimha Chari
Organizer: Narasimha Chari

Session Abstract:Heterogeneous network architectures (HetNets) comprising a mix of lower-power nodes (femtocells and picocells) and higher power macro base stations potentially provide the means to enhance coverage and capacity in cellular data networks. However there are significant challenges to overcome including interference management, resource partitioning, handover, etc. to be able to realize the potential gains.
The distinguished panel of researchers from Ericsson and Verizon Communications will discuss HetNets deployment scenarios and the unique challenges they present, the evolution of technology and standards in the context of LTE and HSPA, and the techniques and tradeoffs required to achieve coverage and capacity improvements.

Speaker: Jin Yang, Verizon

Bio: Dr. Jin Yang is currently a Principal Member of Technical Staff at Verizon Communications, responsible for wireless radio network engineering and advanced technology strategy. She has played a key role in development and commercialization of LTE network in 2010 and various CDMA network developments since 1995 at Verizon.

Title: Heterogeneous Mobile Network

Abstract: Mobile data traffic has grown exponentially, driven by smart phones, notebooks and tablets. Traditional homogeneous cellular network is evolving to a heterogeneous network to fully exploit macro cell, micro/pico cell, femto and WiFi nodes. Various small cell deployment scenarios are presented. Mobility among small cells and macro cells are essential to ensure seamless user experience. Interference mitigation and various dynamic coordination schemes are discussed to improve spectral efficiency and ensure consistent user performance. Intensive field trials are ongoing to explore various mechanisms to optimize scheduler, handover, access and interference control in a heterogeneous network environment.

Speaker: Ali Khayrallah, Ericsson

Bio: Dr. Ali Khayrallah is director of research at Ericsson in San Jose, California. His team is shaping the future of wireless systems, with a focus on radio access. He has been with Ericsson since 1995 in various research positions, first in Research Triangle Park, North Carolina, and now in San Jose. Previously, he was assistant professor in the electrical engineering department at the University of Delaware. He enjoys driving ideas from basic research into implementation. His personal research interest is in information theory and its applications. He holds a Ph.D. and an M.S. from the University of Michigan, Ann Arbor, and a B.Eng. from the American University of Beirut. He holds more than 60 US patents and has published more than 50 technical papers.

Title: HetNets in Mobile System Evolution

Abstract: Mobile systems must evolve to meet ever higher needs in system capacity and peak data rates, and a wide array of service profiles. The explosion in smartphone popularity has created an extreme challenge to network performance, and the adoption of LTE by many leading operators is an opportunity to answer this challenge. Heterogeneous networks (or HetNets) refer to a class of deployment solutions with large macro cells, overlaid with small pico cells sharing the same bandwidth resources. User distributions tend to be uneven in a macro cell, with concentrations in buildings, shopping centers, transportation hubs etc, and judicial placement of pico cells is a key aspect of HetNet deployment. We provide an overview of the direction of HetNet technology, centered on LTE and HSPA, including standards evolution proposals and proprietary techniques. We discuss various design choices, such as types of low power nodes, coordination among cells, power and cell selection, range expansion, etc. We also discuss interference management in the network, and interference mitigation in the terminal, which play an important role in this context.