Wireless Networksystems Are Becoming Increasingly Popular In Recent Years. As the Wirelessresources Are Scarce, It Is Important to Allocate Resources Efficiently Andcarefully In Order to Achieve Maximum Output. the Call Admission Control Scheme;Play a Significant Role In Providing the Desired Quality of Service Byjudiciously Assigning the Radio Channels That Are Available In a Micro Cell.With the Rapid Growing Applications of Multimedia, It Has Become Desirable Forwireless Network Systems to Deliver Broad-Band Services For Integrated Trafficwhich Includes Voice Calls, Data Calls and Images. In This Survey Article Wediscuss Various Aspects of Wireless Network System.