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Robot Local Network Using TQS Protocol for Land-to-Underwater Communications

Irawan Addie, Abas Mohammad Fadhil, Hasan Nurulfadzilah

Journal of Telecommunications and Information Technology

2019

nr 1

23--30

This paper presents a model and an analysis of the Tag QoS switching (TQS) protocol proposed for heterogeneous robots operating in diﬀerent environments. Collaborative control is topic that is widely discussed in multirobot task allocation (MRTA) – an area which includes establishing network communication between each of the connected robots. Therefore, this research focuses on classifying, prioritizing and analyzing performance of the robot local network (RLN) model which comprises a point-to-point topology network between robot peers (nodes) in the air, on land, and under water. The proposed TQS protocol was inspired by multiprotocol label switching (MPLS), achieving a quality of service (QoS) where swapping and labeling operations involving the data packet header were applied. The OMNET++ discrete event simulator was used to analyze the percentage of losses, average access delay, and throughput of the transmitted data in diﬀerent classes of service (CoS), in a line of transmission between underwater and land environments. The results show that inferior data transmission performance has the lowest priority with low bitrates and extremely high data packet loss rates when the network traﬃc was busy. On the other hand, simulation results for the highest CoS data forwarding show that its performance was not aﬀected by diﬀerent data transmission rates characterizing diﬀerent mediums and environments.

Impact of Signaling System Performance on QoE in Next Generation Networks

Batalla J. M., Śliwiński J., Tarasiuk H., Burakowski W.

Journal of Telecommunications and Information Technology

2009

nr 4

124-137

The first experience of quality by multimedia applications' users takes place during the setup phase of a new connection. If the setup phase is not accepted or "slowly accepted", the confidence of the user decreases. The user becomes more sensitive when he/she pays the connections with assured quality of service (QoS). In this case, the process of call request should be also accomplished with QoS guarantees. This paper presents the signaling sub-system implemented within the EuQoS system. The EuQoS signaling process follows main assumptions of next generation networks (NGN) architecture and performs tasks related with codec agreement between multimedia end users, admission control and resource reservation functions. In this paper, we present analytical, simulation and experimental results showing the impact of signaling system performance on quality of experience (QoE) for the potential users of multi-layer EuQoS system. In particular, the presented approach aims at ensuring user QoE of the connection setup phase by ensuring QoS for transferring signaling messages by the network.