5.4 Video Streaming Optimization in the Multi-hop Mesh Network
In this section we derive an algorithm that determines the optimal parameters for (12)
under a predetermined deadline for each MSDU v (given by deadline
v d ) and a predetermined
transmission opportunity duration per link, given by tTXOP(li,j), which is set by the HCCA
admission control once the video flow is scheduled for transmission. Moreover, although
the conditions of the various links vary over time, we assume the network topology to be
fixed for the duration of the video transmission.
5.4.1 End-to-End Optimization
The optimization of (12) can be performed for each node of the mesh wireless network
under the assumption that, for every link li,j, the parameters g(li,j), e(li,j) are determined
based on the chosen modulation m(li,j) and the experienced signal to interference plus noise
ratio (SINR) [22]. In addition, we assume that dqueue(li,j) is communicated to the sender
node via frequent feedback using an overlay network infrastructure [19] [20] that uses real
time protocols for conveying information from different layers.
The proposed optimization algorithm is given in Figure 5.
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