Methodology for calculation of spectrum requirements for the future development of the terrestrial component of IMT-2000 and systems beyond IMT-2000

Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fixed service M Mobile, radiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems SM Spectrum management SNG Satellite news gathering TF Time signals and frequency standards emissions V Vocabulary and related subjects 1 Scope This Recommendation describes a methodology for the calculation of terrestrial spectrum requirement estimation for the future development of IMT-2000 and systems beyond IMT-2000. It provides a systematic approach that incorporates service categories (a combination of service type and traffic class), service environments (a combination of service usage pattern and teledensity), radio environments, market data analysis and traffic estimation by using these categories and environments, traffic distribution among radio access technique groups (RATGs), required system capacity calculation and resultant spectrum requirement determination. The methodology is applicable to both circuit switched and packet switch-based traffic and can accommodate multiple services. 2 Background The estimation of spectrum requirements of wireless applications as described in Recommendation ITU-R M.1390 has been considered as a framework focusing on a single system and market scenario. In the advent of a convergence of mobile and fixed telecommunication and multi-network environments as well as supporting attributes like seamless interworking between different complementary access systems, as described in Recommendation ITU-R M.1645, application of such a simple approach is no longer suitable. Spectrum requirements for the terrestrial components of IMT-2000 were estimated in Report ITU-R M.2023 prior to WRC-2000 by using a spectrum calculation methodology of Recommendation ITU-R M.1390, which is based on a blended 2G and IMT-2000 technology networks. This methodology was essentially based on the paradigm of circuit switching. As indicated in Recommendation ITU-R M.1645, the majority of the future traffic is changing from speech-oriented communications to multimedia communications. Networks and systems will be designed to economically transfer packet data. Therefore, there was a need to develop this Recommendation for the determination of spectrum requirements for the future development of …