Title :
Optimal power allocation based on QoS balance for a multi-rate packet CDMA system with multimedia traffic
Author :
Wang, Lin ; Aghvami, A. Hamid
Author_Institution :
Center for Telecommun. Res., King´´s Coll., London, UK
Abstract :
Usually, when combining two or more services (each having their own QoS requirements), it is difficult to achieve a common operation point for all the services. When we satisfy the highest QoS requirement, the other services will be operating at "unnecessary high quality". In this case, a lot of bandwidth is wasted due to a low traffic load. To solve this problem and to achieve higher spectral efficiency, a "QoS balance" method is developed to optimise the allocation of transmission power and evaluated in a wideband DS-CDMA environment integrated with video and voice services. Our simulation results demonstrate that the capacity of the network or spectral efficiency is improved significantly, by this optimal power allocation scheme.
Keywords :
broadband networks; code division multiple access; multimedia communication; optimisation; packet radio networks; personal communication networks; quality of service; spread spectrum communication; telecommunication traffic; visual communication; voice communication; QoS balance; QoS requirements; bandwidth; integrated traffic; mobile communication systems; multi-rate packet CDMA system; multimedia traffic; network capacity; optimal power allocation; personal communications service; simulation results; spectral efficiency; traffic load; transmission power; video services; voice services; wideband DS-CDMA; 3G mobile communication; Bandwidth; Bit rate; Multiaccess communication; Multimedia systems; Optimization methods; Quality of service; Telecommunication traffic; Traffic control; Wideband;
Conference_Titel :
Global Telecommunications Conference, 1999. GLOBECOM '99
Print_ISBN :
0-7803-5796-5
DOI :
10.1109/GLOCOM.1999.831803
