Multimedia applications have different QoS requirements such as, bounded latency or delay, throughput, jitter, availability, and energy consumption. Since energy efficiency is considered as the main goal of most WSNs routing protocols, the majority of these protocols does not perform well when applied to QoS-constrained WMSN. Routing techniques in WMSN can be classified similarly to those of WSNs. In [4] another categorization for WMSN routing protocols is presented. Protocols are classified based on the handled data types, data delivery model types, classes of algorithms adopted, and the used hole-bypassing approach.