Motivation

Despite the high capacity offered by wired transmissions, the rapid growth of Internet services and increasing interest in new usages and applications on nomadic computing devices like on-demand video streaming, video conferencing and multi-media applications are likely to create a strong demand for high-speed wireless data services. Especially in the downlink, high throughput is needed since the number of downloads of large data files from web sites and servers will increase and broadcast / multicast services may become a reality, that has to be accommodated by 4G systems. Moreover, broadband Fixed Wireless Access has advantages versus wired counterparts, such as large range capabilities, rapid deployment, high scalability, lower maintenance and upgrade costs, granular investment to match market growth and low mobility. It will hence be a relevant candidate for new access infrastructures, e.g. in Eastern Europe or developing countries. The European vision for this new generation is one of a fully IP-based integrated system offering all services, all the time and designed to support multiple classes of terminals. This system will have to address two key issues: n An optimised use of available spectral resources through enhanced technologies such as Multiple Transmit Multiple Receive (MTMR) techniques using pre-equalization, joint detection allowing simultaneous communications from and towards multiple subscribers, and n A seamless interworking and cooperation of existing standards (WMAN and WLAN) ensuring both an end-to-end quality of service and the in-house and out-house coverage. These points are studied and demonstrated in STRIKE for the fixed wireless access relying on interworking between HIPERMAN and HIPERLAN. In fact, since HIPERLAN is foreseen to be proposed in the major high-density areas, a standard switching from FWA to HIPERLAN is attractive and will lead to low cost information delivery in buildings.