Throughput calculation for lte tdd and fdd system pdf

Abbreviations bcch broadcast channel cqi channel quality indicator fdd frequency division multiplexing. As lte uses different channel bandwidths both for fdd and tdd. Based on our sniffer measurements of the running on the desktop and iphone. Comparative simulation for throughput testing of lte. But thats for an fdd system, band n78 is tdd and the channel is thus shared between uplink and downlink. Extension to ratecapped user throughput by using the mgr ps model for noninteger.

Lte fdd system capacity and throughput calculations. Data rate for multiple configurations has been calculated. The physical uplink shared channel pusch is used to transfer application data. Throughput evaluation of downlink multiusermimo ofdmlte system. Receiver throughput test solutions lte fdd lte tdd wimax test solutions conclusions page 2. Pdf throughput performance insights of lte release 8.

Lte also supports both frequency division duplex fdd and time division duplex tdd. What is the maximum downlink throughput that can be achieved. Below you can find a simple lte throughput calculator. In case if you dont know the difference between tdd and fdd. Tdd lte no need of duplexer to isolate transmission and receptions. Main page features terminologies frame tdd fdd channel types phy stack throughput volte ca. Long term evolution lte is 3gpp enhancement to the current cellular system in use. Lte is designed to have wider channels up to 20mhz, with low latency and p acket optimized radio access technology. Lte physical layer fundamentals and test requirements. Lte offers several important benefits for users and operators. Keywords 3gpp lte, ofdm, mimo, mumimo, fdd, tdd and throughput 1. Jun, 2017 lte fdd system capacity and throughput calculation june, 2017 december 25, 2017 admin lte lte system support for flexible bandwidth like 1. Fdd system throughout calculations to calculate the throughput is to calculate how much bit the frame bears in one second. For the detailed data path for lte, you can refer to another pages of this site.

This article explains the impact of control overhead especially pdcch and the procedures that can be used to optimize it. Lte tdd throughput in theory in downlink versus fdd. Long term evolution lte has been designed to support only packetswitched services. Longterm evolution timedivision duplex lte tdd, also referred to as tdd lte, is a 4g telecommunications technology and standard codeveloped by an international coalition of companies, including china mobile, datang telecom, huawei, zte, nokia solutions and networks, qualcomm, samsung, and stericsson. Application to load balancing between frequency layers, including closedform formula for the optimal traffic balancing ratio for the twolayer case. Let us understand peak data rate or lte throughput calculation with following lte system. Considering different codeword reuse in different mimo modes and consumption of control signaling, here is how to calculate theoretic peak throughput. In this paper, authors have explained the calculations of theoretical throughput for both the lte fdd and tdd systems.

Mar 31, 2019 comments off on lte fdd system capacity and throughput calculation lte system support for flexible bandwidth like 1. Tdd lte is half duplex as either upload or download can use the channel but not at the same time. Throughput calculation for lte tdd and fdd systems 1. However, if you ask what is the maximum achievavle throughput for a network or device if we assume that all the resources are allocated to a single uedevice and signal quality is at the best condition, there is a. Throughput speed in mbps calculation in 4g lte in this video we have shown 4 methods by which throughput can be calculated in lte and how various factors affect the actual throughput that an end. The maximum data rate depends on channel bandwidth.

This video explains all the factors that affect possible peak data rate or throughput in lte. With fdd, the bandwidth cannot be dynamically reallocated. Lets take the example for lte using fdd, where channel bandwidth can be 5 mhz, 10 mhz and 20 mhz. This paper provides the information, how this number is calculated.

The spectral efficiency is simply the number of bits transmitted over a frequency bandwidth in a specific time and is measured in bitsshz. This is a simple and straightforward formula for data rate calculation. The paper describes all the factors which affect the throughput like bandwidth, modulation, ue category and multiplexing. A frequently asked question among lte radio planners is that of how to determine the maximum acceptable lte radio interface load that should not be exceeded in order to maintain some targeted user data throughput. Lte throughput optimization is one of the most frequently discussed topic. The following calculations are made for user data bit rates on ip layer including ip headers and lte overhead, i. This page on lte throughput calculator is based on 3gpp ts 36.

Lte frame structure high snr values or by robust modulation or by benefits of tdd over fdd tdd does not require paired spectrum like fdd tdd is cheaper than fdd in tdd facility to change uplink and downlink capacity radio dynamically. Arp lte system support for flexible bandwidth like 1. Previously i discussed lte throughput that can be achieved in downlink for lte fdd case. Mimo, fdd and tdd improve throughput and access efficiency. Throughput for tdd and fdd 4 g lte systems techrepublic. Tdd throughput calculation is very similar to fdd case as you see below. More details how to calculate maximum lte throughput. It calculates maximum dl throughput depending on bandwidth, mcs modulation and coding scheme and mimo usage. Scheduling rate adaptation harq data transmissions. Throughput calculation for lte tdd and fdd system slideshare. The paper describes all the factors which affect the throughput like bandwidth, modulation, ue category and mulplexing. Lte throughput calculator introduction the post presents the simplest way how to calculate lte throughput. The key difference is number of subframes sec parts as marked in red. Throughput and spectral efficiency are two important metrics.

Introduction lte is one of the most promising wirelesses. Pdf throughput and spectral efficiency analysis in 3g. Lte phy performance analysis under 3gpp standards parameters. Lte fdd system capacity and throughput calculation. All major chipset vendors stericsson m700m710 chipsets, altair semiconductor fourgee6150 chipset, and qualcomm mdm9200 mdm9600 chipsets have already released chipsets that support both lte. Lte physical layer fundamentals and test requirements fanny mlinarsky octoscope. The simulator has been used to evaluate the performance of the 3gpp longterm evolution lte technology. Lte tdd what to test andlte tdd what to test and why. As a reader asked, in this post we do the same for lte tdd time division duplex a. Lte network throughput estimation semantic scholar. This page compares tdd vs fdd and describes difference between tdd and fdd topologies tdd means time division duplex and fdd means frequency division duplex. Lte throughput calculator lte throughput calculation. This means that ues will be able to support both tdlte and fddlte with one chipset with only minor modifications required. In lte release 8 there is no carrier aggregation, so lets just consider simple cases.

Jun 27, 2011 hello nice tutorial but if we have downlink shared channel dsh i want to calculate throughput of lte downlink system for siso mode, transmit diversity mimo 2. There have been some operators who made move in tdd deployment. December 2012 throughput calculation for lte tdd and fdd. Let us understand peak data rate or lte throughput calculation with following lte system configuration. These topologies are widely used in advanced wireless communication systems such as wlan, wimaxfixedmobile, lte and so on. It is shown that, given the same 5mhz bandwidth, both systems have similar cell ranges but, for a given target bit rate, there exists an optimum lte system bandwidth that maximizes cell range in both uplink and. This white paper summarizes some simple formulas for calculation of downlink user throughput as a function. Lte fdd throughput calculations free download as word doc. Fdd, semistatic tdd, halfduplex fdd, dynamic tdd 1. Lte fdd system capacity and throughput calculation techplayon. Bandwidth defines how many radio resources are available to transmit data. Complementing eutran in lte is the system architecture evolution sae of the core network that defines epc evolved packet core.

Lte fdd throughput calculations lte telecommunication. Throughput evaluation of downlink multiusermimo ofdmlte. In this paper we described how the throughput calculated and how the throughput. The results can be used for both fdd and tdd variants of lte. To understand tdd and fdd, we have started with, half duplex communication where when one.

Today, we will talk about how much throughput you can achieve in theory for lte downlink tdd scenario. The purpose of developing this system is to keep 3gpp systems competent enough for decades to come. Mostly common deployment of lte in north american market is fdd based. Lte phy performance analysis under 3gpp standards parameters fahimeh rezaei. Throughput for tdd and fdd 4 g lte systems citeseerx. Department of computer and electronics engineering. The system should target a downlink peak data rate of 1 gbps and an uplink peak data. Part 2 spectral efficiency explains data part pdsch of the lte subframe and discusses various ways to improve its efficiency. Fdd system uses a fixed symmetric suboptimal system which cannot be altered. Lte fdd system capacity and throughput calculation june, 2017 december 25, 2017 admin lte lte system support for flexible bandwidth like 1. Our focus is on the fdd variant of lte, although most of the discussion is also applicable to tdd. Abstract long term evolution lte has been introduced by. How to calculate lte data rate downlink throughput. Simplicity lte supports flexible carrier bandwidths, from 1.

So, i have decided to write about the various aspects which can help in lte throughput optimization. Lte handover lte handover latency calculation access node voice services in lte. December 2012 throughput calculation for lte tdd and. Do you want to read the rest of this technical report. Apr 07, 20 in this paper, we discussed about lte system throughput calculation for both tdd and fdd system. Many of us might have heard about lte s peak throughput i. In a previous post i presented how to calculate the maximum throughput of lte, and this was focusing on lte fdd frequency division duplex, where an equal bandwidth of spectrum is allocated for both the downlink and the uplink. Intel 5g next generation and standards new 5g massive apaa for 5. Since everything runs on a pc, it is very easy to add and test new lte features. Lte and beyond dl throughput comprehensive calculations. To test the throughput, a test system needs a golden reference receiver. In some systems the 25mhz band from 869 to 894 mhz is used as the downlink dl spectrum from the cell site. Discussed in the report enodeb throughput calculation models and the calculation. For example, if you are testing a category 3 max throughput case system bw 20 mhz, number of rb 100, the idea max throughput is around 100 mbps.

Nov 21, 2017 throughput calculation for lte tdd and fdd systems 1. This means that ues will be able to support both td lte and fddlte with one chipset with only minor modifications required. Current lte supports a subset of 6 different system bandwidths. Another difference is about tbs each subframe as marked in blue. With these figures, the 5g nr speed on the 100 mhz channel is 876 mbits and lte throughput will be 375 mbits, 1. Use this calculator to calculate lte throughput, and carrier aggregation throughput. Scribd is the worlds largest social reading and publishing site. In this paper we present a multiuser mimoofdmbased simulator that includes the main physical layer functionalities and calculate the throughput of lte frequency division duplex fdd and time division duplex tdd systems. The most important lte radio interface parameters are summarized in table 1 for the convenience of the reader.

Lte throughput test informal drivethrough testing of initial verizon lte deployments in the boston area measure throughput using. Apr 02, 2016 this video explains all the factors that affect possible peak data rate or throughput in lte. Lteadvanced should allow cell edge user throughput to be as high as possible. Longterm evolution timedivision duplex ltetdd, also referred to as tdd lte, is a 4g telecommunications technology and standard codeveloped by an international coalition of companies, including china mobile, datang telecom, huawei, zte, nokia solutions and networks, qualcomm, samsung, and stericsson. Today is the start of uplink throughput computation. Throughput evaluation of downlink multiusermimo ofdm. From the estimation calculation for downlink under lte in 34, we assume that an adhoc rn has the capacity to relay 1, 2 or 3 resource blocks rbs under lte with fdd at one time, using 64. There has been a series of posts for lte throughput computation in both fdd and tdd.

Comments off on lte fdd system capacity and throughput calculation lte system support for flexible bandwidth like 1. Fdd lte is full duplex this means that both the upload and download are always available. The lte throughput calculation is based on modulation type,tbs index and tbs size. And we need to know how many re is used in one second. Mar 17, 2018 tdd or fdd is the duplexing technique which is used in the communication world for exchanging information. Lte provides outstanding data rates beyond 150 mbps in 2 x 20 mhz bandwidth due to less overhead wimax uses asymmetric 29. In this paper, we discussed about lte system throughput calculation for both tdd and fdd system. Performance and capacity lte should provide downlink peak rates of at least 100mbps. Lte data throughput spirent 8100 mobile device test system key features automated data throughput and latency performance testing of lte devices under realworld conditions protects existing investment in spirent cdma and umts solutions with a costeffective upgrade path sophisticated epc emulation enables maximum throughput. Lte network throughput estimation alexander babkin, alexey pylenok, alexander ryzhkov, andrey trofimov. The system also supports both unicast and multicast traffic in cell sizes from local area or micro cells hundreds of. Performance evaluation of lte network with different modulation. Pdf througput calculation for lte systems dennis kilach. Receiver system performance tests usually require a golden receiver to.