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首页> 外文会议>Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE >Opportunistic scheduling for streaming users in high-speed downlink packet access (HSDPA)
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Opportunistic scheduling for streaming users in high-speed downlink packet access (HSDPA)

机译：高速下行链路分组访问（HSDPA）中流用户的机会调度

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High-speed downlink packet access (HSDPA) achieves high data rates and high spectral efficiency by using adaptive modulation and coding (AMC) schemes and employing multi-code operation of CDMA. In this paper we present opportunistic algorithms for scheduling HSDPA users and selecting modulation and coding schemes that exploit channel variations to increase the probability of an uninterrupted media play-out. First we introduce a discrete event model for HSDPA system to transform the scheduling problem for providing an uninterrupted play-out to a feasibility problem that considers short term and long term quality of service (QoS) constraints. A methodology for obtaining a feasible solution is then proposed by starting with a so called stable algorithm that satisfies the long term QoS constraints (if possible with any scheduling policy). Next, we present stochastic approximation algorithms that adapt the parameters of the stable algorithm in a way that a feasible point for the short term QoS is reached within the feasibility region of the long term QoS.
机译：高速下行链路数据包访问（HSDPA）通过使用自适应调制和编码（AMC）方案和使用CDMA的多码操作来实现高数据速率和高谱效率。在本文中，我们提供了用于调度HSDPA用户的机会主义算法，并选择利用频道变体的调制和编码方案来增加不间断媒体播放的概率。首先，我们向HSDPA系统介绍一个离散事件模型，以改变调度问题，以便提供不间断的播放到考虑短期和长期服务质量（QoS）约束的可行性问题。然后通过以满足长期QoS约束的所谓的稳定算法开始（如果可能的任何调度策略）开始，提出用于获得可行解决方案的方法。接下来，我们提出了随机近似算法，其使稳定算法的参数适应，即在长期QoS的可行性区域内达到短期QoS的可行点。

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