Light-weight streaming protocol for the Internet of Multimedia Things: Voice streaming over NB-IoT

VIoT: Voice over Internet of Things

“…emergency, training, mentoring). The bandwidth and latency requirements of these voice applications are relatively high, but they are now more viable with the latest advancements in communication technologies [4]. While, some applications require only unidirectional voice communication, such as public address or notification systems.…”

“…Besides, there are also studies that extend the CoAP protocol to better support media streaming features in IoT [13], [14]. In [4], we investigated an efficient streaming protocol for IoMT applications and services, in which heterogeneous multimedia things can interact seamlessly with each other and with other connected devices. The proposed solution uses open IoT protocols and creates a uniform representation for the media semantics combined with interaction models that can be used for dealing with various multimedia technologies and streaming applications.…”

“…As presented in Fig. 7, for the VIoT GW implementation, we used an open-source LwM2M Server platform, named Leshan, with required extensions (Media Sensor/Actuator objects, Streaming API) as defined in [4]. For the virtual SIP clients, we used Linphone application and extended it with Control and Stream APIs for establishing interactions with the ITL to place and receive calls, inform presence, and configure codecs.…”

“…In order to evaluate the VIoT platform, we also performed tests with real networks: NB-IoT and BLE. In theory, NB-IoT offers lower limits for the communication periods (24-28ms for downlink, 21-45ms for uplink single-tone) based on the network quality and utilized transport block size (TBS) [4]. Similarly, BLE v4.2 specification offers connection interval ranges from 7.5 ms to 4 seconds.…”

“…Then, it studies the first conceptual design of efficient and standard-based integration of Voice over IP (VoIP) and IoT ecosystems by taking the capabilities of IoT devices and the requirements of telephony applications into consideration, which enables the paradigm of Voice over IoT (VIoT). For this, it leverages on one of our previous works, which studied a standard-based streaming protocol for Internet of Multimedia Things (IoMT) [4]. Additionally, the technical capabilities and characteristics of the proposed architecture are validated and evaluated by means of practical analysis and a real-life implementation, which interconnects a VoIP client and a voice-enabled IoT device.…”