Research on Rate Allocation Schemes for the Reverse Link in CDMA2000 System

This paper focuses on the rate allocation schemes on the reverse link (RL) of cdma2000 IxEV-DV system. Two schemes, the time-scheduled (TS) scheme and the rate-controlled (RC) scheme are described and compared. Based on their pros and cons, we propose a modified version to bring together the merits of the two schemes. The proposed scheme, which is called multi-step-up RC scheme, can enable a mobile to increase its rate by multiple steps when needed. The TS scheme, RC scheme and the proposed scheme are respectively simulated on our cdma2000 IxEV-DV Release D reverse link system level simulation platform. Our simulation results show that the proposed scheme can efficiently utilize the radio resource and improve the user´s QoS performance of delay. In addition, the performance gain is achieved using the same amount of signaling overhead as that of RC scheme, which is much less than that of TS scheme. The idea of the proposed scheme can be applied to other similar communication systems