Relaying for IMT-Advanced
This chapter overviews relaying techniques in general, and describes them within the International Mobile Telecommunications Advanced framework in particular. The most common relaying deployment scenarios are analyzed and the efficient combination of Coordinated MultiPoint transmission or reception and relaying for an International Mobile Telecommunications Advanced cellular networks is evaluated. Relaying for indoors scenario, is compared to femtocells. Finally an overview of cooperative relaying is given.
7.1 An Overview of Relaying
The main driving force in the development of wireless communication networks and systems is to provide, among other aspects, increased coverage and support for higher data rates. At the same time, the cost of building and maintaining the system is of great importance and is expected to become even more so in the future. Moreover, higher demand on data rates and on longer battery life are requested from the end-user perspective. Until recently the main topology of wireless communication systems has been fairly unchanged, for the first three generations of cellular networks. The topology of existing wireless communication systems has been hitherto characterized by the cellular architecture, which consists of fixed radio BS and UEs as the only transmitting and receiving entities in the network. Alternatively a radio device node called a Relay Node (RN) ...