...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Vehicular Technology >Streaming-Viability Analysis and Packet Scheduling for Video Over In-Vehicle Wireless Networks
【24h】

Streaming-Viability Analysis and Packet Scheduling for Video Over In-Vehicle Wireless Networks

机译：车载无线网络上视频的流生存能力分析和分组调度

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

State-of-the-art vehicles are now being equipped with multiple video channels for video-data transmission from multiple surveillance cameras mounted on the automobile, navigation videos reporting the traffic conditions on the planned route, as well as entertainment-multimedia streaming for passengers watching on rear-seat monitors. Wireless LANs provide a low-cost and flexible infrastructure for these emerging in-vehicle multimedia services aimed at the driver''s and passengers'' safety, convenience, and entertainment. To enable the successful simultaneous deployment of such applications over in-vehicle wireless networks, we propose delay-sensitive streaming and packet-scheduling algorithms that enable simple, flexible, and efficient adaptation of the video bitstreams to the instantaneously changing video source and wireless-channel characteristics while complying with the a priori negotiated quality-of-service (QoS) parameters for that video service. Our focus is on real-time low-cost solutions for multimedia transmission over in-vehicle wireless networks that are derived based on existing protocols defined by QoS-enabled networks, such as the IEEE 802.11e standard. In addition, the aim of this paper is to couple the proposed solutions with a novel multitrack-hinting method that is proposed as an extension of conventional MP4 hint tracks in order to provide real-time adaptation of multimedia streams to multiple quality levels for different in-vehicle applications, depending on their importance and delay constraints. First, the scheduling constraints for these simultaneous wireless video-streaming sessions are analytically expressed as a function of the negotiated QoS parameters. This is imperative because a video stream received from an in-vehicle road-surveillance camera will have a different set of delay and quality constraints in comparison to that of traffic monitoring received from remote video cameras located on the planned route. Hence, transmission paramete-rs, such as peak data rate, maximum burst size, minimum transmission delay, maximum error rate, etc., will differ for the various video streams. For this reason, new low-complexity packet-scheduling algorithms that can fulfill diverse QoS streaming conditions are proposed and analyzed. The proposed algorithms produce viable schedules (i.e., strictly QoS-compliant) that jointly consider the delay constraints and the in-vehicle video-receiver-buffer conditions. Hence, these scheduling schemes can completely avoid the underflow or overflow event of the receiving-device buffer while guaranteeing the agreement between the real-time video traffic and the predetermined traffic specification reached during QoS negotiation for various in-vehicle video channels. When combined with multitrack hinting, an integrated flexible system for adaptive multimedia streaming over QoS-enabled in-vehicle wireless networks can be constructed. We demonstrate the viability of the proposed scheduling mechanisms experimentally by using real video traces under multiple quality levels, as derived by the multitrack-hinting design. In addition, simulations under realistic conditions are also performed to validate the ability of the method to satisfy buffer-occupancy constraints.
机译：目前，最先进的车辆配备了多个视频通道，可从安装在汽车上的多个监控摄像头传输视频数据，导航视频报告计划路线的交通状况，并为乘客提供娱乐多媒体流在后座显示器上观看。无线局域网为这些新兴的车载多媒体服务提供了一种低成本，灵活的基础架构，旨在为驾驶员和乘客提供安全，便利和娱乐。为了能够在车载无线网络上成功地同时部署此类应用程序，我们提出了时延敏感的流和包调度算法，这些算法可以使视频比特流简单，灵活，高效地适应瞬时变化的视频源和无线通道。特性，同时符合该视频服务的事先协商的服务质量（QoS）参数。我们的重点是在车载无线网络上进行多媒体传输的实时低成本解决方案，这些解决方案基于基于QoS的网络定义的现有协议（例如IEEE 802.11e标准）而派生。此外，本文的目的是将提出的解决方案与一种新颖的多轨提示方法相结合，该方法被提议作为对传统MP4提示音轨的扩展，以便为多媒体流提供实时的适应，以适应多种质量水平。 -车载应用程序，取决于其重要性和延迟约束。首先，将这些同时进行的无线视频流会话的调度约束解析为所协商的QoS参数的函数。这势在必行，因为与从计划路线上的远程摄像机接收到的流量监控相比，从车载道路监控摄像机接收到的视频流将具有一组不同的延迟和质量约束。因此，传输参数，例如峰值数据速率，最大突发大小，最小传输延迟，最大错误率等，对于各种视频流而言将有所不同。因此，提出并分析了可以满足各种QoS流条件的新的低复杂度分组调度算法。提出的算法产生可行的时间表（即，严格地符合QoS），该时间表共同考虑了延迟约束和车载视频接收器-缓冲器条件。因此，这些调度方案可以完全避免接收设备缓冲器的下溢或上溢事件，同时保证针对各种车载视频信道的实时视频流量与在QoS协商期间达到的预定流量规格之间的一致性。与多轨提示结合使用时，可以构建一个集成的灵活系统，用于通过启用QoS的车载无线网络进行自适应多媒体流传输。我们通过使用多轨提示设计得出的多个质量级别下的真实视频轨迹，通过实验证明了拟议的调度机制的可行性。此外，还进行了现实条件下的仿真，以验证该方法满足缓冲区占用限制的能力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号