22.1003GPPTSUMTS Phase 1
The UMTS system will be defined in a phased approach. The present document specifies the requirements for Release ’99 of UMTS. Some requirements which are necessary to ensure a smooth transition to later releases are also indicated. The present document should, however, be read in conjunction with the other 22.000 series documents which provide a complete description of the requirements for UMTS Release ’99.