International Journal on Recent and Innovation Trends in Computing and Communication ISSN: 2321-8169 Volume: 2 Issue: 1 17 – 19 _______________________________________________________________________________________ 17 IJRITCC | January 2014, Available @ http://www.ijritcc.org ______________________________________________________________________________________ Design and Performance Evaluation of DL MAC Scheduling Model in LTE SIDDHARTH MAHIDA Electronics and Communication Parul Institute of Engineering and Technology Limda,Waghodia,Vadodara E-mail: sid.ldce20@gmail.com ASLAM .S. DURVESH Assistant Professor, Electronics and Communication Parul Institute of Engineering and Technology Limda,Waghodia,Vadodara E-mail:aslamdur@gmail.com Abstract- In case of Long Term Evolution (LTE), the scheduler in the MAC layer of the eNodeB allocates the available radio resources among different UEs in a cell through proper handling of priority. The scheduling method used largely impacts the throughput of individual users as well as throughput of the cell. It is worthwhile to check on the throughput conditions for different scheduling scenarios before the actual deployment of LTE. This would help design the algorithm of the scheduler at the eNodeB appropriately. In this dissertation, the throughput conditions require to investigate for different scheduling methods in LTE. Keyword- Scheduling, MAC, CQI , Throughput. UE, eNodeB. _________________________________________________*****_________________________________________________ I.INTRODUCTION In the recent years, the world was introduced to mobile broadband. Multimedia applications through the Internet have gathered more attention. Applications such as live streaming, online gaming, mobile TV require higher data rate. The Third-generation Partnership Project (3GPP) started to work on solutions to these challenges and came up with the HSPA. The HSPA is currently used in 3G phones for such applications. Later, the 3GPP[2] has worked on the Long Term Evolution (LTE)[1] and intends to surpass the performance of HSPA. The Long Term Evolution supports high peak data rates (100 Mb/s in the downlink and 50 Mb/s in the uplink), low latency (10ms round-trip delay) in different bandwidths ranging from 1.4MHz up to 20MHz. In mobile broadband networks like LTE, the high performance and throughput[3] of the radio network can be realized with proper scheduling of resources for different types of services. The scheduling of resources in the transport network is an area which needs proper attention especially. In December 2008, the LTE specification was published as part of Release 8. The initial deployment of LTE was expected in 2009. The first release of LTE namely release-8 supports peak rates of 300Mb/s, a radio-network delay of less than 5ms. Multiple Input Multiple Output(MIMO) have gathered a lot of attention recently. It allows the achievement of high peak data rates. Furthermore LTE operates both Frequency Division Duplexing(FDD) and Time Division Duplexing (TDD) and can be deployed in different bandwidths. With TDD the uplink and downlink operate in same frequency band whereas with TDD the uplink and downlink operate in different frequency bands.LTE uses a simplified flat network infrastructure that consists of only two nodes: the enhanced eNodeB (eNB) and the mobile management entity/serving gateway (MME/S- GW). This is also one of the main factors that LTE can achieve a reduced latency compared to UMTS/HSPA. Another design goal was to increase spectrum efficiency. LTE uses a combination of multi-antenna techniques and Orthogonal Frequency Division Multiplexing (OFDM) to achieve higher data rates and offer the required spectrum deployment and flexibility. II. LTE SYSTEM ARCHITECTURE Research of the 3GPP has resulted in the development of the Evolved Packet System (EPS). The EPS consists of: Core Network (CN), Evolved Packet Core (EPC), and Evolved UTRAN (E-UTRAN)[9], it is also referred to as LTE. Figure.1 Overview of the EPC/LTE architecture.