FeelMaTyC (Feedback-less Machine-Type Communication)

对于许多基于机器类型通信（MTC）的应用，例如图像、计量或传感器信息的传输，双向通信是不必要的，因为它仅用于协调和保证传输以及执行介质访问控制。通过应用从机器类型设备到基站的单向（无反馈）通信，可以节省增加的资源需求以及能量消耗和将接收器集成到mtc节点的成本。因此，纯mtc发射机网络可以以较低的价格生产并以良好的条件运营。这是允许大规模应用无线物联网mtc概念的先决条件。相反，这些节省是由于MTC节点不能保证其数据传输的目标服务质量。此外，网络控制对单个节点的介质访问方式没有影响。为了确保应用程序所需的服务质量具有一定的可靠性，了解在这种不协调和无反馈的网络中MTC节点密度的性能限制及其服务质量要求是很重要的。此外，通过适当的参数化设计来优化这些限制是很重要的。因此，本提案的目标是在物理层和介质访问控制层共同研究的基础上确定无反馈网络中的性能限制。此外，它的目标是设计合适的框架结构和机制，以实现业务优先级以及过载场景下的优雅降级。因此，将研究分组碰撞对物理层的影响，并通过帧设计、信道编码和交错、使用定义良好的信息叠加、不同模式的多次传输、发送端发射能量在时域和频域的分布式分配以及接收端单级和多级连续干扰消除等机制来解决这些影响。因此，在物理层上，将利用滤波器组-多载波（FBMC）调制方案在时域和频谱传输能量遏制方面的有利特性，以最佳方式检测和分离多接入信道中的不同步数据包。在物理层上获得的结果将集成到网络模拟器中，以获得对整体网络性能的评估。通过这些网络层模拟，将评估不同的服务质量需求、协议、节点配置、空间节点分布以及过载行为。最后，将使用软件定义的无线电试验台在基于测量的环境中验证仿真结果。

For many machine-type communication (MTC) based applications, e.g. transmission of pictures, metering or sensor information, bi-directional communication is not necessary, as it is merely used to coordinate and assure the transmission and to perform medium access control. By application of unidirectional (feedback-less) communication from a machine-type-device to a base station, the costs for an increased resource requirement as well as the energy consumption and the integration of a receiver into the MTC-node can be saved. Thus, pure MTC-transmitter networks can be produced on low price and operated on good terms. This is a prerequisite to allow for mass applications of MTC-concepts for the wireless Internet-of-Things.On the contrary, these savings are obtained by the fact, that an MTC node cannot guarantee the target quality-of-service for its data transmission. Furthermore, the network control has no influence on the medium access methods of the individual node. To ensure the application required quality-of-service with a certain reliability, it is important to know the performance limits with respect to the MTC node density as well as their quality-of-service requirements in such an uncoordinated and feedback-less network. Additionally, it is important to optimize these limits with suitably parameterized designs.Thus, the target of this proposal is to determine the performance limits in a feedback-less network based on the joint investigation of the physical layer and medium access control layer. In addition, it targets to design suitable frame structures and mechanisms for service prioritization as well as graceful degradation in overload scenarios.Thereby, the investigation of packet collision effects on the physical layer and their resolution by mechanisms like frame design, channel coding and interleaving, usage of well defined information superposition, multiple transmission with different modes, distributed allocation of the transmit energy in time and frequency domain on transmitter side, as well as single- and multistage successive interference cancelation at receiver side will be investigated. Therefore, on the physical layer the favorable properties of a filterbank-multicarrier (FBMC) modulation scheme with respect to the excellent temporal and spectral transmission energy containment will be used in order to optimally detect and separate unsynchronized packets in the multi-access-channel.The results obtained on the physical layer will be integrated into a network simulator to obtain an assessment of the overall network performance. With these network layer simulations the different quality of service requirements, protocols, node configurations, spatial node distribution as well as the overload behavior will be assessed.Finally a software defined radio testbed will be used to validate the simulation results in a measurement based environment.