We introduce a personalised similarity algorithm for peers’ attributes modelling as a scaling factor for trust evaluation. We propose DATM protocol a trust-based scheme to enforce collaborative behaviour in wireless mobile networks taking into consideration the peers’ attributes for an efficient routing scheme. In this paper, we hypothesise that in a trust-based routing protocol, it will be additional trust evaluation reliability if peers can take into consideration their partners attributes’ status in addition to the trust relationships. This further made the design of efficient, collaborative routing protocols a challenging task due to the high dynamics of peers’ characteristics and mobility. Most current trust-based protocols in the literature enable peers to make routing decisions based on trust relationships that manifest among peers but with less concern about the peers’ attributes. One promising approach adopted by researchers to improve peers’ routing decisions is a trust-based routing mechanism. In the context of Intermittently Connected Mobile Networks, researchers have proposed different collaborative routing schemes with fundamental objectives to maximize packets delivery, and minimise latency through improving peers’ routing decisions. When buffer unit is packet, a smaller proportion of UDP traffic ensures low packet loss rate for both TCP traffic and UDP traffic. The simulation results reveal that a smaller proportion of UDP traffic ensures low packet loss rate for TCP traffic when buffer unit is byte. We further analyze this unexpected unfairness for UDP traffic, and present two models to explain the unfairness created by different buffer units in routers. We draw the conclusion that the different buffer units would create an unfair impact on UDP traffic. However, when buffer unit is structured in terms of packet, the UDP packet loss rate is higher than the TCP packet loss rate. When buffer unit is structured in terms of byte, the UDP packet loss rate is lower than the TCP packet loss rate. In this paper, we find that the loss performance of routers with very small buffers is impacted by the buffer unit structure. However, all the previous studies ignored whether buffer unit was structured in terms of packet or byte. There were a variety of different views of buffer sizing presented in the literature. In recent years, router buffer sizing becomes one of hot research topics.
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February 2023
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