HCQ: Hierarchical Cross-layer approach for QoS provisioning in WSN

Due to the constraints of wireless communications in general and wireless sensor networks in particular, the layered model is poor in mechanisms to support QoS (Quality of service) in such networks. However, the cross-layer model proposes different techniques and architectures allowing collaboration between layers to overcome the limitations of the layered model. In this context, we have proposed the HCQ (Hierarchical Cross-layer approach for QoS provisioning in WSN) model which uses a cross-layer architecture allowing the support of QoS in a monitoring application with different types of traffic. Indeed, our contribution involves three layers, namely, the application layer, the network layer, and the MAC (Medium Access Control) layer. Synchronization between the three layers is implemented allowing the same interpretation of the assigned priorities.