Aggregation of MQTT Topics over Integrated Satellite-Terrestrial Networks

Abstract

The MQTT application protocol was originally designed for monitoring a oil pipeline through the desert by collecting sensor data via satellite link. Thus, by design MQTT is very suitable for data collection over integrated satelliteterrestrial networks. Leveraging on the MQTT Bridge functionality, in this work we propose a novel architecture with two MQTT Brokers located at the satellite terminal and the satellite gateway. By using the topic pattern option, supported by the bridge, a subscriber can request several topics within a single request. To reduce the amount of traffic exchanged over the satellite return channel, we introduce in the architecture a new entity, namely MQTT message aggregation filter, which aggregates all the MQTT topics matching the topic pattern in the same response.

Improvement of MQTT semantic to minimize data flow in IoT platforms based on distributed brokers

“…On the other hand, there are numerous works 29,32,33 regarding data fusion, filtering, and aggregation From the previous works, two contributions caught our attention the most. First, the study by Kurdi et al 29,30 proposed MQTT-MFA, which is the first work that can be directly compared to MQTT-SD because it enables message aggregation in a distributed MQTT architecture. However, Kurdi et al focus on data aggregation in an edge-based MQTT architecture.…”

“…The second simulations scenario focused on comparing our approach with the data fusion approaches by brokers at the edge level, such as MQTT-MFA. 29,30 Our approach is different from these edge approaches because of the broker are located at the Mist network (IoT device network). For this scenario, we assume the generalized case of IoT device networks (Mist) randomly constructed with a uniform distribution of IoT devices.…”

Performance Evaluation of a Satellite Communication-Based MEC Architecture for IoT Applications

“…In detail, MEC functionalities include also: 1) local processing, such as downsampling and duplicated values suppression, to perform data compression; 2) data aggregation, such as aggregating different values by collecting a given amount of messages over time in a single MQTT message to reduce the protocol header overhead. This type of MEC functionalities are already proposed in [41]. As a step ahead with respect to this work, we perform an accurate performance evaluation by using real MQTT software implementation on a Linux-based testbed.…”

Hierarchical Topic Aggregation for Geospatial Applications through Processing Extensions in Message Brokers

“…Pallatella et al investigated aggregation of MQTT topics using multi-topic subscription patterns which is a closely related concept but without any geospatial bindings [5]. For wide-area IoT, Livaja et al proposed geospatial pub/sub conceptually, but do not introduce a working solution [4].…”