%0 Journal Article %T A QoS-based Multichannel MAC Protocol for Two-Tiered Wireless Multimedia Sensor Networks %A Ekbatanifard, Gholamhossein %A Yaghmaee Moghaddam, Mohammad Hossein %A Monsefi, Reza %J International Journal of Communications, Network and System Sciences %@ 1913-3715 %D 2010