The main functional modules of this architecture were defined. The operations of SS and BS were described when signaling or data were exchanging between them.2. Call admission control algorithm based on a threshold strategy was studied. In order to maintain conversation in handoff process and ensure higher QoS requests for real time services, this algorithm defined priorities among services. Five thresholds were set according to above-mentioned cheap ralph lauren polo shirts priorities. Different priority services were admitted under different bandwidth usage circumstances, which was controlled by these thresholds. A bandwidth borrowing mechanism was adopted by taking advantage of the adaptive bandwidth traits of ERTPS、RTPS and NRTPS in order to Lacoste Polo maximize the number of connections and bandwidth utilization.The simulation results showed that the method of setting thresholds guaranteed high-priority services better access ratio at the cost of low-priority services’access ratio.3. Considering the various rates of services in Lacoste Polo Shirts network, this thesis improved a weight-based dynamic call admission control algorithm. The product of average arrival rate and cheap evening dresses transfer rate in measurement unit time were used as weight to distribute bandwidth for different services. The cheap wedding gown dresses simulation results showed that, comparing with the old method which used average arrival rate as weight to allocate bandwidth only, the improved method could reflect the bandwidth requirement of each service more exactly. In this way, it improved the blocking probability, dropping probability and bandwidth utilization of system.
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