From the last few years the wireless technology growing exponentially, which is showing a noticeable impact in the field of telecommunications to develop and improve the entire system away from the means of transmission with wires to the without wires (radio frequency) communication. The main problem in wireless environment is deficient bandwidth and time varying channel conditions. The arrival of portable computers, laptops, palmtops and personal digital assistants with incorporated communication capabilities facilitates wireless communication. Quality of service (QoS) is the key problem of today’s wireless communication system because of unending requirements of user. In this paper we will study the requirements, challenges and its possible solutions of QoS in GSM by considering the path loss.
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