Based on each user's current context, Radiator continuously adapts each message propagation path and delivery delay, making an efficient use of network bandwidth, arguably the biggest bottleneck in the deployment of large-scale context propagation systems.
Thus, in order to achieve better performance in disseminating warning messages, or to shorten the propagation delay, a proper space limitation should be performed to efficiently lower the collision rate as much as possible, to realize a faster propagation time.
In fact, the urgency level depends on many factors: location, social distance (e.g., if it's a friend or an acquaintance), current activity, mood, etc. Radiator allows programmers to define the tolerable propagation delay of each message based on the current context of the users involved (sender and recipient).
In addition, the researcher did not take into account the propagation delay between the relay request message and the relay response message.
Finally, the process ends when node A receives this synchronization reply message at T4. Assuming that the clock drift and the propagation delay do not change from the transmission of the request message to the reception of reply one; node A calculates their value by using the following expressions (1): d = T 2 − T 1 − T 4 − T 3 2 ; Δ = T 2 − T 1 + T 4 − T 3 2 (1).
As a whole, for LTE and 4G, the extra authentication delay resulting from the new framework is the propagation delay of the three EAP messages (EAPOL-Start, EAP-Request/Identity and EAP-Success).
We simulate the message propagation, node and link failure, network topology and link delay.
The length of a time slot τ is defined to correspond to the maximum propagation delay of resource request and acknowledgement messages.
We show, through a detailed and extended simulation evaluation, that our parameter-based family of protocols for multi-path data propagation significantly reduce the number of collisions and thus increase the rate of successful message delivery (to above 90%) by achieving satisfactory trade-offs with the average propagation delay.
