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The increasing demand for capacity in order to provide high data-rate multimedia services in wireless environments necessitates enhanced radio transmission techniques and network protocol functionality. Such techniques have to be added to already existing mobile cellular networks, e.g., as provided by Enhanced Data Rates for GSM Evolution (EDGE). For 3rd(More)
The increasing demand for capacity in order to provide high data rate multimedia services in wireless environments necessitates enhanced radio transmission techniques and network protocol functionality. Such techniques have to be added to already existing mobile cellular networks, e.g. as provided by EDGE. For 3 generation UMTS networks based on WCDMA, the(More)
This document intends to present a definition of scenarios, and a first approach to the definition of STRIKE project requirements, to be used by the different technical activities within the STRIKE project (WP3, WP4, WP5 and WP6). Aspects such as definition of services, traffic models, scenarios, channel models, and simulation and demonstrator common(More)
The CDMA based UMTS transmission technology in which all users simultaneously share the same common range of spectrum gets rather affected by system interference. The reduction of interference is therefore a key issue in the development of optimal radio transmission in order to increase system capacity. Power control is a well-known technology to improve(More)
Wireless last mile technology is becoming a challenging competitor to conventional wired last mile access systems like DSL and cable modems or even fiber-optic cables. The European Telecommunications Standards Institute (ETSI) and the Institute of Electrical and Electronics Engineers (IEEE) have lately developed a new standard for fixed broadband wireless(More)
The standardization of UMTS Terrestrial Radio Access (UTRA) in Time Division Duplex (TDD) mode includes two different transmission modes at the physical layer. They differ in their chip rate and with it their bandwidth requirements and characteristics vary. This paper provides a description of the main differences between the High Chip Rate (HCR) and Low(More)
This paper presents system design, communication concept and performance studies of an innovative secure and reliable communication system for Emergency Medical Services (EMS). This work is based on the research projects Med-on-@ix and its successor TemRas. The main objective of both projects is the development and deployment of a system concept for quality(More)