Exhaustive Appraisal of Adaptive Hybrid LTE-A Downlink Scheduling Algorithm
Shrishti Bhatia1, Ashwini Kunte2

1Shrishti Bhatia, Assistant Professor, Department .of EXTC, Thadomal Shahani Engineering College, Bandra(w), Mumbai University, Mumbai, India.
2Dr. AshwiniKunte, Vice Principal, Head of.theDepartment of EXTC, ThadomalShahani Engineering college, Bandra (w), Mumbai University, Mumbai, India.
Manuscript received on November 22, 2019. | Revised Manuscript received on December 15, 2019. | Manuscript published on December 30, 2019. | PP: 4765-4772 | Volume-9 Issue-2, December, 2019. | Retrieval Number: B2632129219/2019©BEIESP | DOI: 10.35940/ijeat.B2632.129219
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Long Term Evolution- Advanced (LTE-A) networks have been introduced in Third Generation Partnership Project (3GPP) release – 10 specifications, with an objective of obtaining a high data rate for the cell edge users, higher spectral efficiency and high Quality of service for multimedia services at the cell edge/Indoor areas. A Heterogeneous network (HetNet) in a LTE-A is a network consisting of high power macro-nodes and low power micro-nodes of different cell coverage capabilities. Due to this, non-desired signals acting as interference exist between the micro and macro nodes and their users. Interference is broadly classified as cross-tier and co-tier interference. The cross tier interference can be reduced by controlling the base station transmit power while the co-tier interference can be reduced by proper resource allocation among the users. Scheduling is the process of optimal allocation of resources to the users. For proper resource allocation, scheduling is done at the Main Base station (enodeB). Some LTE-A downlink scheduling algorithms are based on transmission channel quality feedback given by user equipment in uplink transmission. Various scheduling algorithms are being developed and evaluated using a network simulator. This paper presents the performance evaluation of the Adaptive Hybrid LTE-A Downlink scheduling algorithm. The evaluation is done in terms of parameters like user’s throughput (Peak, Average, and Edge), Average User’s spectral efficiency and Fairness Index. The evaluated results of the proposed algorithm is compared with the existing downlink scheduling algorithms such as Round Robin, Proportional Fair, Best Channel Quality Indicator (CQI) using a network simulator. The comparison results show the effectiveness of the proposed adaptive Hybrid Algorithm in improving the cell Edge user’s throughput as well the Fairness Index.
Keywords: Long Term Evolution (LTE), Long Term Evolution- Advanced (LTE-A), Scheduling algorithms, Channel Quality Indicator (CQI), Throughput, Fairness Index.