uation Methodology and Baseline Configurations 12.8 Link-level And System-level Channel Models 12.9 IEEE 802.1 16m Link-level and System-level Performance 12.9.1 Cell Spectral Efficiency and Cell Edge User Spectral Efficiency 12.9.2 VoIP Capacity 12.9.3 Mobility 12.9.4 Peak Spectral Efficiency 12.9.5 User-Plane/Control-Plane Latency and Handover Interruption Time 12.9.6 Frequency Bands and Operation Bandwidth 12.9.7 IEEE 802.16m Link Budget 12.9.8 Additional Link-Level Simulation Results 12.10 3GPP LTE-Advanced Link-level and System-level Performance 12.10.1 Cell Spectral Efficiency and Cell Edge Spectral Efficiency 12.10.2 VoIP Capacity 12.10.3 Mobility 12.10.4 Peak Spectral Efficiency 12.10.5 User-Plane/Control-Plane Latency and Handover Interruption Time 12.10.6 Estimation of the L1/L2 Overhead 12.10.7 Frequency Bands and Operation Bandwidth 12.10.8 3GPP LTE-Advanced Link Budget 12.10.9 Evaluation of 3GPP LTE-Advanced Against Release 10 Requirements Index Preface Wireless communication comprises a wide range of technologies, services, and applications that have come into existence to meet the particular needs of users in different deployment scenarios. Wireless systems can be broadly characterized by content and services offered, reliability and performance, operational frequency bands, standards defining those systems, data rates supported, bi-directional and uni-directional delivery mechanisms, degree of mobility, regulatory requirements, complexity, and cost. The number of mobile subscribers has increased dramatically worldwide in the past decade. The growth in the number of mobile subscribers will be further intensified by the adoption of broadband mobile access technologies in developing countries such as India and China with large populations. It is envisioned that potentially the entire world population will have access to broadband mobile services, depending on economic conditions and favorable cost structures offered by regional network operators. There are already more mobile devices than fixed-line 