Ring Based Call Admission Control Scheme for Future Mobile Networks

Abstract

The bandwidth of cellular mobile systems is remarkably growing with emerging new network technologies. LTE is a key step towards future high speed cellular networks, but large bandwidth on its own does not fulfill the QoS requirements of real-time multimedia connections. It is more important to guarantee the amount of network resources required by real-time VoIP and video connections.In this paper, we introduce a Ring based Call Admission Control (CAC) Scheme which enables the prediction of the future position of the users thus enhancing CAC decisions. We examined the required number of rings for optimal prediction using analytical methods. Furthermore we present a vector based extension of the newly proposed algorithm.

Untitled

“…A Ring Based CAC (RCAC) Scheme was proposed in [22] to improve resource utilization. The RCAC reserves a certain amount of resources for HCs based on current mobility prediction.…”

“…These schemes provide QoS for high priority calls but waste RBs due to the fixed reservation used as some resources may be left unused. The schemes proposed in [22,25] dynamically reserve RBs by adjusting the amount of reserved resources for high priority calls based on traffic conditions and service contracts in order to efficiently utilize the resources.…”

“…Although these schemes have higher resource utilization compared to the fixed reservation, the scheme in [22] inefficiently manage resources due to uncertainty in mobility prediction. In addition, these schemes degrade QoS requirements of higher priority calls as reserved resources may be insufficient when their traffic increases.…”