Combined Power and Rate Control for Integrated Voice and Data Transmission Systems

In this paper, two combined power and rate control (CPRC) algorithms, without-priority CPRC and priority-based CPRC, are proposed for the uplink of a cellular system integrated constant bit rate (CBR) voice and variable bit rate (VBR) data transmission. The CBR users and the VBR users are treated equally when assigning power and rate by the without-priority CPRC algorithm; while the CBR users are given higher priority by the priority-based CPRC algorithm. Simulation results demonstrate that the proposed algorithms can provide better performance than SPC (selective power control) algorithm proposed by S.-L.Kim. Comparing with the without-priority CPRC, the priority-based CPRC can provide lower outage probability for CBR users and less transmission power at the cost of throughput of VBR users under heavy system load.