ENHANCEMENT OF Qos IN LTE DOWNLINK SYSTEMS USING FREQUENCY DIVERSITY SELECTIVITY SCHEDULING

LTE is a broadband wireless access network offers rich suite of multimedia applications and developed by Third generation partnership project is designed to support ubiquitous delivery of multimedia services. For this reason, numerous research groups are annoying to utilize its concert. Scheduling and resource allocations are the vital components of wireless data schemes. The CSI (channel state information) makes possible to acclimatize transmissions to channel conditions, which is essential for achieving reliable communication with high data rates in systems. To assist resource allocation, classification algorithm is used to identify mobility users. According to the taxonomy, Frequency diversity and selectivity scheduling algorithm is proposed to synchronies low mobility user for multi user diversity and high mobility user for frequency diversity. Continuous rate adaptation is used to make best use of the channel spectral efficiency given a limited number of time-frequency resource blocks. The capacity allocation allocates the total capacity among each of the base stations in an amount that corresponds to the predictable traffic load at each base station. It is verified by simulation that throughput and capacity is increased for the proposed algorithm. Keywords—Long term evolution (LTE), OFDMA, Frequency diversity,Multi user diversity,Channel quality indicator,Resource block, Proportional fair scheduling,Channel state information. -----------------------------------------------------------------------***-------------------------------------------------------------------