In the EXP/PF scheme, RT users always have a higher priority than NRT users when their HOL packet delays are approaching the maximum delay constraint, regardless of the experienced QoE.
Furthermore, Jeong et al. in [11] proposed to prioritize the packets according to the so-called "emergency factor" which is the ratio between the packet delay and the maximum delay constraint.
In (3), W max is the maximum HOL packet delay of all RT service users in the cell considered, τ max is the maximum delay constraint of RT services (in milliseconds), whereas ε and k are constants defining how ω(t) is updated depending on W max and τ max.
The end-to-end packet delay over a single wireless network (d r ) is dominated by the queueing delay at the bottleneck link, and it can be approximated by an exponential distribution [39], i.e., P d r > T ≈ 1 2 π exp - T d r, (13). in which denotes the maximum delay constraint that prevents the playback buffer starvation.
Results presented in Figure5a have been derived using a maximum packet loss constraint P l max ≤ 0.01 and a maximum average delay constraint D l max ≤ 10.
For smooth playback of a live video, transmitted packets must meet maximum allowed delay constraint.
The maximum number of processors nmax then depends only on the maximum call setup delay constraint and the capacity becomes independent of μ.
Here, we use the results of the two research tools to conduct comparative analysis to verify whether the results of the TTE simulation can meet the delay constraints of the maximum delay derived from network calculus.
To take delay constraints into account we introduce as the maximum number of time slots, a message is allowed to use for transmission from its source to its destination, that is,.
The system we described in the "Network model" section uses a GI size larger than double the maximum delay of the individual channels, in order to comply with the constraints described above.
