Chris Johnson has worked on LTE for the past 3 years. He has worked in mobile telecommunications for the last 16 years, spending most of this time focused on UMTS. Chris has been employed by Nokia Siemens Networks for the past 10 years. He is currently a Principle Engineer at Nokia Siemens Networks and is based in the UK. Chris has previously authored the ‘Radio Access Networks for UMTS – Principles and Practice’ title and has contributed content within the ‘Radio Network Planning and Optimisation for UMTS’ and ‘HSDPA/HSUPA for UMTS’ titles. These titles have been published by John Wiley & Sons, Inc.