Rate and Power Adaptation for Downlink Shared Channel in WCDMA
Rate adaptation scheduling with prioritized call admission control for UMTS WCDMA networks is analyzed. Admission is based on maximum base station transmit power and service class priority. Conversational and interactive services are considered. Real Time services with stringent QoS requirements are operated in circuit switched mode over the dedicated radio bearers. Downlink shared channels are used to transport Non Real Time data handled in packet switched mode. Rate adaptation based upon link quality for NRT services and system load is introduced to improve performance and increase capacity. Results indicate that rate adaptation scheduling uses radio resource efficiently and improves system stability. Compared with fixed rate scheduling, rate adaptation scheduling results in better overall QoS.
Unable to display preview. Download preview PDF.
- UMTS; QoS concept and architecture, 3GPP TS 23.107 Google Scholar
- Gyung-Ho Hwang and Dong-Ho Cho, “Dynamic rate control based on interference and transmission power in 3GPP WCDMA system”, IEEE VTC’2000 Fall, vol.6, pp. 29262931 Google Scholar
- Takumi ITO, Seiichi Sampei and Norihiko Morinaga, “Adaptive transmission rate control scheme for ABR services in the CBR and ABR services integrated DS CDMA systems”, IEEE VTC’2000 Fall, vol.5, pp. 2121–2125 Google Scholar
- UMTS; Physical channels and mapping of transport channels onto physical channels (FDD), 3GPP TS 25.211 V 3.4.0 Release 1999 Google Scholar
- UMTS; “Selection procedures for the choice of radio transmission technologies of the UMTS”, (UMTS 30.03 V 3.2.0) Google Scholar
- A. Iera, S. Marano, and A. Molinaro, “Call level and burst level priorities for effective management of multimedia services in UMTS”, IEEE INFOCOM’96, vol. 3, pp. 13631370 Google Scholar