Performance analysis for channel borrowing without locking schemes with multimedia services and cut-off priority

We investigate traffic performance of CBWL schemes with multimedia services on non-homogeneous cellular network in, which cut-off priority is given to handoff calls. Two generic routing schemes are analyzed: one is the random ized routing and the other is the least loaded routing. The performance mea sures that we focus on are the new call blocking probabilities and the hand off failure probabilities. To evaluate blocking probabilities of interest, we construct a generalized access network whose blocking. probabilities are same as ones for CBWL systems. For analysis of generalized access network, we apply the reduced load approximation. The computational complexity and memory requirements of proposed algorithm are linear so that we can use thi s algorithm to approximate blocking probabilities of CBWL systems of large size. The proposed approximations are tested on a number of simple examples . Numerical results for 12 cells and 36 cells networks are given. The compa rison between approximation and simulation results shows that the proposed approximation method is quite accurate.