This paper considers energy-efficient connectivity for Internet of Things (IoT) devices in a coexistence scenario between two distinctive communication models: pull- and push-based. In pull-based, the base station (BS) decides when to retrieve a specific type of data from the IoT devices, while in push-based, the IoT device decides when and which data to transmit. To this end, this paper advocates introducing the content-based wake-up (CoWu), which enables the BS to remotely activate only a subset of pull-based nodes equipped with wake-up receivers, observing the relevant data. In this setup, a BS pulls data with CoWu at a specific time instance to fulfill its tasks while collecting data from the nodes operating with a push-based communication model. The resource allocation plays an important role: longer data collection duration for pull-based nodes can lead to high retrieval accuracy while decreasing the probability of data transmission success for push-based nodes, and vice versa. Numerical results show that CoWu can manage communication requirements for both pull-based and push-based nodes while realizing the high energy efficiency (up to 38%) of IoT devices, compared to the baseline scheduling method.

翻译：本文研究了物联网（IoT）设备在两种不同通信模型（拉取型和推送型）共存场景下的能效连接问题。在拉取型通信中，基站（BS）决定何时从物联网设备检索特定类型的数据；而在推送型通信中，物联网设备自行决定何时传输以及传输哪些数据。为此，本文倡导引入基于内容的唤醒（Content-based Wake-up, CoWu）技术，该技术使基站能够远程激活仅装有唤醒接收器的某子集拉取型节点，以观测相关数据。在此设置下，基站在特定时间实例通过CoWu拉取数据以完成其任务，同时从采用推送型通信模型的节点收集数据。资源分配起着关键作用：延长拉取型节点的数据采集时间可提高检索精度，但会降低推送型节点的数据传输成功率，反之亦然。数值结果表明，与基准调度方法相比，CoWu能够管理拉取型和推送型节点的通信需求，同时实现物联网设备的高能效（提升高达38%）。