Multiple-RAT Selection for Reducing Call Blocking/Dropping Probability in Cooperative Heterogeneous Wireless Networks
There is an increasing demand for high bandwidth-consuming services such as real-time video and video streaming over wireless access networks. A single Radio Access Technology (RAT) in a heterogeneous wireless network may not always have enough radio resource to admit high bandwidth-consuming calls, such as video call. Existing Joint Call Admission Control (JCAC) algorithms designed for heterogeneous wireless networks block/drop an incoming call when none of the available individual RATs in the network has enough bandwidth to admit the incoming call. Consequently, video calls experience high call blocking/dropping probability in the network. However, some calls such as multi-layer coded (scalable) video can be transmitted/received over one or multiple RATs.