This paper proposes a novel scheduling algorithm called Query-based Scheduling Algorithm(QSA) to address the issue of real-time query processing in on-demand data broadcast environments.

现有的实时数据广播研究中，只考虑了具有截止期约束的单个数据请求的调度问题，而支持实时查询处理的数据广播技术尚未得到足够的关注。

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This paper introduces the architecture of on-demand data broadcast and the performance metrics, analysis the basic scheduling algorithm, preemptive scheduling and real-time scheduling algorithms.

本文介绍了基于需求的数据广播的系统结构和性能衡量标准，并分析了基本的广播调度算法，抢占式调度算法以及实时调度算法。

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In this paper, an adaptive hybrid broadcast algorithm is proposed, which focuses on the channel and data allocation of periodic broadcast and on-demand broadcast.

本文提出了自适应混合广播算法，该算法主要研究了周期广播和联机请求广播带宽和数据的分配。

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