A simple packet-transmission scheme for wireless data over fading channels
A simple packet-transmission scheme for wireless data over fading channels
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DOI：
10.1109/tcomm.2004.831354
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发表时间：
2004-07
影响因子：
8.3
通讯作者：
Heng Wang;N. Mandayam
中科院分区：
文献类型：
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作者：
Heng Wang;N. Mandayam
在这封信中，我们提出了一种简化的分组在衰落信道上传输的调度方案，该信道被建模为有限状态块信道。我们首先研究了在平均时延和丢包两个约束条件下的最小功率传输策略。最佳策略需要复杂的表查找才能实现。为了缓解这一问题，我们设计了一种简化的传输策略，该策略基于对三个控制参数的检查：传输速率阈值、信道状态阈值和传输缓冲区大小。我们的结果表明，简化方案的最小平均功率与最优策略所达到的最小平均功率非常接近。此外，通过单服务器批量服务队列对简化方案进行建模，我们推导出平均功率和延迟等服务质量指标的近似值，从而允许对策略设计进行分析。
In this letter, we present a simplified scheduling scheme for packet transmission over a fading channel which is modeled as a finite-state block channel. We first address the optimal minimum power-transmission policy with constraints on both average delay and packet loss. The optimal policy requires a sophisticated table lookup for implementation. In order to alleviate this problem, we design a simplified transmission policy that is based on checking for three control parameters: a transmission-rate threshold; a channel-state threshold; and the transmission buffer size. Our results show that the minimum average power with the simplified scheme is very close to that achieved by the optimal policy. Further, modeling the simplified scheme via a single-server bulk-service queue, we derive approximations to the quality of service metrics, such as average power and delay, that allow for analytical insights into the policy design.