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Cloud-based communications system is now widely used in many application fields such as medicine, security, and environment protection, etc. Its use is being extended to the most demanding services like multimedia delivery. However, there are a lot of constraints when cloud-based sensor networks use the standard IEEE 802.15.3 or IEEE 802.15.4 technologies. This paper proposes a channel characterization scheme combined to a cross-layer admission control in a dynamic cloud-based multimedia sensor networks to share the network resources among any two nodes. The analysis shows the behaviour of two nodes using different network access technologies and the channel effects for each technology.Moreover, it is also shown the existence of optimal node arrival rates in order to improve the usage of dynamic admission control when network resources are used. An extensive simulation study was performed to evaluate and validate the efficiency of the proposed dynamic admission control for cloudbased multimedia sensor networks.

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