一种基于ACK反馈的多用户分组调度方法

ACK Based Scheduling Algorithm for 1xEV-DV

利用自动重传请求(ARQ)的应答(ACK/NAK)和前向信道质量高度相关这个特点,针对1xEV-DV的前向分组数据业务提出了一种新的调度方法.新方法无需反馈信道质量信息(CQI),只基于ACK反馈进行前向分组数据信道(F-PDCH)调度.比之于传统调度方法,新方法省略了信道质量报告信道(R-CQICH),改为要求用户在R-ACKCH上密集发送ACK/NAK信息,此信息除用于混合ARQ操作外,同时用于多用户分组调度.仿真表明,新方法有更好的吞吐量并能满足正比公平准则.

Based on the strong correlation between the ARQ (automatic repeat request) acknowledgements (ACK/NAK) and the forward channel quality, a novel scheduling scheme is proposed for 1xEV-DV forward packet data traffic. The proposed scheme schedules the forward packet data channel (F-PDCH) only with the ACK/NAK feedbacks, the implicit channel quality information feedback is no more required. Compared to the conventional design, the proposed scheme replace the channel quality information feedback channel (R-CQICH) with dense feedbacks on ARQ acknowledge channel (R-ACKCH). The feedback is used for both Hybrid ARQ operation and the multi-user packet scheduling. Simulation results indicate that, under the proportional fairness constraints, the system throughput with new algorithm outperforms the conventional algorithm.