Energy Efficient Management and Self-organized Operation in Sensor Networks

E2SO项目的总体目标是研究移动节点之间的无线通信协议选择，在保持本已紧张的能量预算的同时，提高整个通信系统的可靠性。所有调查都将直接以第一个供资期间的研究结果为基础，以便将预期成果无缝地纳入已开发的系统架构。主要的目标仍然是在非常动态的异质传感器网络中提供高效的、即能量和资源优化的通信。第二个资助期的研究目标可分为以下几类。首先，移动节点之间的通信需要考虑到能量预算和硬件约束。计划进一步开发唤醒系统，以便交换节点ID以及完整的遭遇信息。为此，必须区分从地面站发送的信号和来自另一个移动节点的信号。以最好的方式，节点ID可以已经被编码在唤醒信号中。为了实现这一点，必须开发用于自适应协议管理的新概念。其次，在不增加能耗的情况下，需要提高整个通信系统的健壮性和可靠性。一种方法是利用多个地面站同时接收的来自移动节点的无线电信号的空间分集。这些信号的组合可以显著提高通信可靠性。目的是将地面网络用作分布式和动态的多天线系统，需要以自组织的方式进行配置和维护。最后，要解决系统的可扩展性和可用性，特别是对于其他计算机科学项目，以及支持生物学家对实验参数的动态适应。将研究协议设计中的新概念，以进一步扩展唤醒系统，以即使在BAT飞行期间也向移动节点传送参数变化(几个字节)，以及支持在其本站的完整软件更新(几千字节)。编码算法被认为提供更新过程所需的稳健性。

The overall objective of the project E2SO (Energy Efficient Management and Self-organized Operation in Sensor Networks) is to research wireless communication protocol options between the mobile nodes and to improve the reliability of the entire communication system while maintaining the already tight energy budget. All the investigations will be directly based on the research results from the first funding period in order to seamlessly integrate expected results into the developed system architecture. The dominating objective is still to provide efficient, i.e., energy and resource optimized communication in very dynamic heterogeneous sensor networks. The research goals of the second funding period can be categorized as follows. First, the communication among the mobile nodes needs to be designed keeping the energy budget and the hardware constraints into account. It is planned to further develop the wake-up system in order to exchange node IDs as well as complete encounter information. For this, the signal sent from the ground station and that from another mobile node must be distinguished. In the best way, the node ID can already be encoded in the wake-up signal. In order to achieve this, novel concepts for adaptive protocol management have to be developed. Secondly, the robustness and reliability of the entire communication system needs to be improved without increasing the energy consumption. One approach is to exploit the spatial diversity of the radio signals from the mobile nodes that are received by multiple ground stations simultaneously. The combination of these signals may substantially improve the communication reliability. The aim is to use the ground network as a distributed and dynamic multi antenna system that needs to be configured and maintained in a self-organizing manner. Finally, scalability and usability of the system is to be addressed, particularly for the other computer science projects as well as for supporting the dynamic adaptation of experiment parameters by the biologists. Novel concepts in protocol design will be researched to further extend the wake-up system to also communicate parameter changes (a few byte) to the mobile nodes even during the bat flight as well as to support complete software updates (a few kilobyte) at their home station. Coding algorithms are considered to provide the required robustness of the update procedure.