Design and Development of Medium Access Control Scheduler in LTE eNodeB

11 May

Long Term Evolution (LTE) is a major step in mobile radio communications, and is beyond

3G systems and is the next generation cellular system of 3GPP .3GPP’s Long Term Evolution isdefined by the standardization body’s Release 8. LTE uses OFDMA and SC
-FDMA as its radio accesstechnology with advanced antenna technologies such as Multi-Input Multi-Output (MIMO), for bothdownlink and uplink. LTE is a system with complex hardware and software. In case of Long Term Evolution (LTE), the scheduler in the Medium Access Control (MAC) layer of the eNodeB allocates theavailable radio resources among different UEs in a cell through proper handling. LTE schedulers are part of layer 2 protocol stack and are one such module which can dramatically increase or decreasethe performance of the system. In this paper, we are presenting various types of scheduling schemes of  LTE and their advantages. The output conditions such as memory usage and execution time for varying number of users are investigated for three of the scheduling methods: Proportional Fair (PF), Modified-Largest Weighted Delay First (MLWDF) and EXP-Proportional Fair (EXP-PF) scheduling algorithm. Developed algorithms are tested for single-cell/multi-cell with multiple-user scenarios inboth TDD/FDD frame structure.





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