ABSTRACT
Future wireless systems will be (IP) internet protocol-based and will provide acceptable quality of service (QoS) in terms of speed, bit error rate (BER), end-to-end packet loss, jitter, and delays for different types of traffic. Many technological achievements were made in the last few years in the area of communications and others are planned for the future to allow new, emergent, and future services. Whereas in the past, new technologies pushed new services, today reality can be the opposite: end users want services to be employed on a day-to-day basis, whatever the technology supporting it. Users want to browse the Internet, have e-mail access chat, and establish a video conference session, regardless of the technology used (e.g., WiMAX, Wi-Fi, 3G, HSPA, etc.). It is most important to have the required/desired service available, and with quality. Thus, services must be delivered following the concept of “anywhere” and “anytime.” Figure 1.1 presents the bandwidth (BW) requirements for each different service.
