Proceedings of the ... International Wireless Communications & Mobile Computing Conference. International Wireless Communications & Mobile Computing Conference最新文献

英文中文

Cross-layer Energy Optimization Under Image Quality Constraints for Wireless Image Transmissions. 图像质量约束下无线图像传输的跨层能量优化。

Proceedings of the ... International Wireless Communications & Mobile Computing Conference. International Wireless Communications & Mobile Computing Conference

Pub Date : 2012-01-01 DOI: 10.1109/iwcmc.2012.6314342

Na Yang, Ilker Demirkol, Wendi Heinzelman

Wireless image transmission is critical in many applications, such as surveillance and environment monitoring. In order to make the best use of the limited energy of the battery-operated cameras, while satisfying the application-level image quality constraints, cross-layer design is critical. In this paper, we develop an image transmission model that allows the application layer (e.g., the user) to specify an image quality constraint, and optimizes the lower layer parameters of transmit power and packet length, to minimize the energy dissipation in image transmission over a given distance. The effectiveness of this approach is evaluated by applying the proposed energy optimization to a reference ZigBee system and a WiFi system, and also by comparing to an energy optimization study that does not consider any image quality constraint. Evaluations show that our scheme outperforms the default settings of the investigated commercial devices and saves a significant amount of energy at middle-to-large transmission distances.

无线图像传输在许多应用中至关重要，例如监视和环境监测。为了充分利用电池供电相机的有限能量，同时满足应用级图像质量约束，跨层设计至关重要。在本文中，我们开发了一种图像传输模型，该模型允许应用层(例如用户)指定图像质量约束，并优化传输功率和数据包长度等底层参数，以最小化给定距离内图像传输中的能量消耗。通过将提出的能量优化应用于参考ZigBee系统和WiFi系统，并与不考虑任何图像质量约束的能量优化研究进行比较，评估了该方法的有效性。评估表明，我们的方案优于所研究的商用设备的默认设置，并且在中大型传输距离上节省了大量的能量。

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