Lte low dl throughput

Lte low dl throughput. 4, Analysis of the data . Jul 12, 2023 · To get DL throughput massive MIMO of gNodeB you should: 1. The algorithm is convenient for operation and useful in guiding network planning and optimization, the simulation results show that the algorithm is effective and Sep 13, 2017 · The MCS, SINR, DL throughput, RSRP, and relationships between the essential parameters of the LTE network, were presented with a series of broken line graphs. Another difference is about TBS each subframe as marked in blue. Throughput Calculation - From UE Cateogory . The measured data were then compared with the 3GPP theoretical values in Sect. The following calculations are made for user data bit rates on IP layer (including IP headers and LTE overhead, i. Sep 1, 2020 · In the first cluster, min DL throughput in L2100 has a range of 2. 39 for the uplink. RLC throughput is generally higher than PHY Mar 23, 2022 · Throughput of an LTE cellular network often changes periodically over a few seconds. See full list on techtrained. There are 116 records. Feb 17, 2020 · Table 4 depicts the statistics of measured SINR, PCC PHY DL Throughput, and the PDCP DL Throughput at Site 2. So if the system bandwidth of LTE channel changes, number of the channels (sub carriers) changes but the space between channels does not change. With no mmWave reception, T-Mobile NR DL throughput is superior to Verizon’s, even though the Verizon BS is very close to the building. Сalculator allows to calculate the maximum throughput of 4G LTE network for DL (downlink) and UL (uplink) LTE General . . Throughput Calculation - TDD . When a UE is at the cell border it will need to transmit a strong signal to reach the tower. When RSRP < -120dB, the mean throughput is 0. total BW As you see, you can get the System Bandwidth and SFN by decoding MIB. Oct 21, 2019 · Smart preallocation is automatically started once there DL data transmission. ii) System Frame Number (SFN) iii) PHICH Configuration. 4. One physical resource block (PRB) spans 12 sub-carriers; each sub-carrier is 15-kHz spacing Mostly common deployment of LTE in North American market is FDD based. g, 100 Mbps and over) is pretty tough task not only for IP stack, but also the IP application software and CPU utilization. BS receive. NR Operating Band. The mean SINR is 2. Jun 18, 2024 · Bandwidth check LTE frequency band 36. 4 Mbps — แปลงเป็นหน่วย Mb/s ซึ่งเป็นหน่วยมาตรฐานที่คุ้นเคย 3) แต่ทว่า DL throughput ที่ 50. In order to determine physical layer performance, we need to calculate the total physical resources available for different bandwidths of downlink transmission. Mobile wireless technologies have undergone four distinct generations; from uncomplicated voice calls in the first generation to high-speed, low latency and video streaming in the fourth generation. 1Mbps to 0. The 5G throughput in the downlink refers to 5G-NB to UE data rate while in the uplink it refers to UE to 5G-NB data rate. This post is to address common issues that affects downlink throughput and also to dig into possible solutions. Various Machine Learning (ML) models utilized Long-Term Evolution (LTE) data measurements for the prediction process. BS transmit. Overall trend that you can easily notice and is easily understandable is. 4G LTE Throughput calculator. ii) Low throughput does not necessarily mean low CQI. This work models and predicts the DL-Throughput by utilizing LTE data measurements to train supervised ML models. A network planning approach is required for network services to meet user expectations and meet their needs. Which means that in LTE you will have even bigger TBS than HSPA+ Dual Carrier. Feb 27, 2020 · An overview of capacity and data throughput optimisation in LTE. Use this calculator to calculate LTE throughput, and carrier aggregation Throughput. Similar steps are outlined to troubleshoot uplink throughput 🔘 LTE Radio Frame duration = 10ms 🔘 Sub-frame duration = 1ms 🔘 Time Slot duration = 0. Expand Jul 1, 2023 · Because Downlink Throughput (DL-Throughput) holds significant importance factors for network performance, DL-Throughput prediction can be used to evaluate the quality of cellular networks. In the LTE system, the UL capacity is divided between control channels and signals (SRS, DM-RS, PRACH) and the traffic channel, that is, PUSCH. MasterInformationBlock ::= SEQUENCE { dl-Bandwidth ENUMERATED { n6, n15, n25, n50, n75, n100}, phich-Config PHICH-Config, But I want to show you overall correlation between RLC throughput and Physical layer throughput. There are 574 records left. UE transmit. Clearly, this makes difficult to develop analytical tools to accurately A resource block (RB) is the smallest unit consisting of resource elements in the LTE air interface. There have been some operators who made move in TDD deployment. The key difference is 'number of subframes /sec' parts as marked in red. DL Bandwidth Efficiency: Sep 15, 2022 · The first issue is simple. 4, 3, 5, 10, 15, and 20 MHz), the total overheads, and the spectral efficiency, which is determined by the DL SINR. It is because there is some subframes where you cannot allocate full RBs (100 RBs in case of 20Mhz, Cat 3). For LTE, ATT-b2 mainly uses a combination of 64-QAM and 256-QAM modes, and this results in the highest normalized downlink throughput performance among the LTE channels. 4 Mbps นั้นคือ Dec 1, 2021 · A framework model for predicting downlink throughput (DL-Throughput) using ML models in fourth and fifth generations (4G/5G) cellular networks is proposed and the critical and effective parameters such as Reference Signal Received Power, Signal to Interference and Noise Ratio, and Reference Signal Receive Quality have been applied. In reality throughput will be a bit lower due to increased number of pilot signals. LTE throughput calculator EXAMPLE: Input : MCS = 10, PRBs = 20, Number of MIMO Antennas = 2 Outputs : LTE throughput = 6. Jan 11, 2024 · Although similar to DL throughput, UL throughput has special considerations to take when analyzing performance issues on a network. Original code from Github. com Feb 5, 2024 · Let’s understand the various factors impacting the spectral efficiency and ways to perform LTE throughput optimization. Type 1 uses Frequency Division Duplexing (uplink and downlink separated by frequency), and TDD Time Division Duplex: A duplexing technique dividing a radio channel in time to allow downlink operation during part of the frame period and uplink operation in the Download scientific diagram | Measurements of PDCP DL Throughput at sites 1e3. Dec 21, 2015 · DL throughput = 50,400/ms — ส่งข้อมูลได้เท่านี้ใน 1 ms DL throughput = 50. As LTE uses different channel bandwidths both for FDD and TDD. There are 98 records. Sep 20, 2020 · On the other hand, min DL throughput in L1800 is between 0. This increasing demand in LTE level throughput (e. 3) of Dec 1, 2020 · The SVM model identifies UEs with low throughput, while the E-LSTM predicts cell DL throughput to provide information about potential target cells for these UEs. 122 Mbps. massive MIMO UE throughtput depend on sinr, RB number etc… Oct 9, 2019 · Dan juga harap diingat bahwa throughput LTE yang dirasakan oleh pengguna bergantung juga pada network load atau traffic utilizationnya, jika memang loadnya sudah penuh atau PRB utilnya diatas 80%, maka DL thpnya juga akan menurun dan mempengaruhi SINR seperti yang pernah ditulis di blog ini sebelumnya pada pembahasan pengaruh load ke SINR. 1 Mbps). Networks on LTE band 20 (LTE-FDD) are suitable for roaming in ITU Region 1 only. 5ms 🔘 Symbol duration = 0. Even though there is huge difference between LTE and Non-LTE in terms of physical layer implementation, you can just think of this as just extention of HSPA. For operations in Band 252, only the following set of DL EARFCNs is allowed N DL,allowed = {n-2, n-1, n, n+1, n+2 | n = 255244, 255444, 255644, 255844, 256044} For operations in Band 255, only the following set of DL EARFCNs is allowed LTE Physical Layer Overview. PRE-REQUISITE. 2100 Band 1 and Channel Bandwidth 15 Mhz The RSRP and RSRQ graphs compared, in this section, allow us to observe the possible relationship between them and the throughput obtained. Following equation/formula is used for this LTE throughput calculator. Note: In 4G LTE, there is a one-to-one mapping between base station channel bandwidth and UE channel bandwidth. General factors to influence the max throughput for user data are as follows : Duplex Mode : Half Duplex or Full Duplex (it is highly likely that Half Duplex will be used for LTE-M1 deployment) B where B = 12 features after removing low correlated ones with UE DL throughput, and with one feature of the highly predict UE DL throughput in LTE cellular networks, which are Fig. 5 Mbps during peak, and that’s not very bad for medium traffic volume in this cluster. 4 MHz 3 MHz 5 MHz 10 MHz 15 MHz 20 MHz UE DL Сategories list: Maximum number of DL-SCH transport block bits received within a TTI (Note 1) Maximum number of bits of a DL-SCH transport block received within a TTI: Total number of soft channel bits: Maximum number of supported layers for spatial multiplexing in DL: DL Category M1 (Note 4) 1000 or 1736: 1000 or 1736: 25344 or 43008: 1 Space between the chhanel and the next channel is always same regardless of the system bandwidth of the LTE band. Dec 1, 2023 · Since Verizon 5G mmwave was not received during these tests, the DL throughput is solely via aggregation of LTE and low-band NR. 5ms / 7 🔘 Symbol count = 7 in normal CP 🔘 Subcarrier bandwidth = 15 KHz 🔘 Subcarrier count in one PRB = 12 🔘 Transmission Time Interval = 1ms (minimum scheduling time for user, 2 PRB at once) Downlink Throughput Sep 22, 2015 · In order to estimate the DL cell average throughput of LTE network, the paper proposes an algorithm of LTE throughput based on MCS level distribution which can be used to estimate the DL cell capacity under different load conditions. 5 Mbps to 1 Mbps at (1 AM, 5 PM) for the number of UEs in a range of 41% to 93% from total UEs recorded in this cluster as in Table 4. Ericsson defined throughput (UL or DL) is "the speed at which packets are being transferred by the time the first packet has been scheduled in the air interface". Simply select network type and type in the LCID/CID. The past decade has witnessed a staggering evolution in cellular networks. from publication: Analysis of Key Performance Indicators of a 4G LTE Network Based on Experimental Data Obtained from LTE is rapidly gaining momentum for building future 4G cellular systems, and real operational networks are under deployment worldwide. 36. 2 and 2. 72, the record is as below: When -115dB <=RSRP <= -120dB, the mean throughput is 0. There is high correlation between RLC throughput and PHY throughput; One thing I found strange (interesting) in this example is . 4G/LTE - PHY Channel Physical Layer Parameter - DL, FDD . So, in stead of directly jumping into max throughput test, increase the throughput step-by-step and check CPU utilization (e. In LTE release 8 there is no carrier aggregation, so let’s just consider simple cases. 2 EARFCN 525: Freq. The data rate at this step is determined only by number of REs allocated for the data and the modulation method (QPSK, QAM, 16 QAM etc). Feb 21, 2023 · If low CQI values are found after a CQI report is obtained, then downlink interference might be the cause of low throughput. #LTELowThroughput #4GLowThroughput#CQI #4GCQISubscribe Like & Share. Mode. One of the reasons for throughput fluctuation is the congestion in the network which may be caused due to multiple devices being connected to the same cell. I'm trying to replicate the Probability of Detection vs. initial throughput is multiplied by 2 or 4 either MIMO 2x2 or MIMO 4x4 selected, respectively. real user bit rate will be a bit lower). Let's delve into the technical details of throughput in LTE: 1. Example 1 > Throughput, CQI, BLER while driving on a highway LTE throughput calculator EXAMPLE: Input : MCS = 10, PRBs = 20, Number of MIMO Antennas = 2 Outputs : LTE throughput = 6. Use this page calculate things such as eNB ID/RNC-ID/BSIC or hex values of IDs. Dec 29, 2022 · Throughput is a basic KPI on any LTE network. 5. The LTE throughput optimization procedure described in this article requires PDCCH enhancements. To achieve high throughput performance, in addition to an advanced physical layer design LTE exploits a combination of sophisticated mechanisms at the radio resource management layer. 2. 22 Mbps . So, it is very likely that you would see low CQI when you see throughput drop in livenetwork test. If coverage (RSRP) is bad, the throughput will be bad. So, with Drive Test data, if there is low throughput and the RSRP is also low then that would typically indicate a bad coverage scenario. g, you can monitor the CPU utilization using Windows Task Manager) View lte-low-throughput-analysis-and-improvement-techniques-ppt_compress. What is Throughput? • The term throughput refers to ratio of data transmitted in unit of time. The relation between EARFCN and the carrier frequency in MHz for the downlink is given by the following equation, where FDL_low and NOffs-DL are given in Table 5. May 24, 2017 · UL: same as DL. 3-1 and NDL is the downlink EARFCN. lte LOW throughput analysis & improvement techniques objective Analysis This site is for everything on 4G/LTE. Another notice is calculated throughput includes LTE headers (i. [CGJ+14] modeled the logarithm of LTE DL throughput by linearly combining (and normalizing) several predictors: RSRP, RSRQ, RSSNR, day-hour, day of the week, device model, and MNO Politically sensitive content; Content concerning pornography, gambling, and drug abuse; Content that may disclose or infringe upon others ' commercial secrets, intellectual properties, including trade marks, copyrights, and patents, and personal privacy In WCDMA, HSDPA, HSUPA probably 'Yes', but in LTE you would still have a little low throughput than the 3GPP spec value even in PHY throughput. Is one of Jan 11, 2024 · Although similar to DL throughput, UL throughput has special considerations to take when analyzing performance issues on a network. 7. Uplink (UL) operating band. The throughput for a device working in a live network would vary at every moment as you can see this drive test. CEUs also have very low DL throughput during peak hours in the three bands (from 0. It is a critical metric that directly impacts the user experience and the efficiency of the wireless network. • The unit of throughput is bits per second or bps. g. The quality of DL-Throughput is a critical element for video streaming and gaming. The throughput at the last step in the process can be defined as physical layer throughput. UE receive. For many people working in LTE, one of the most important question would be what is the maximum throughput for a network, device or network operator. Jul 1, 2023 · Because Downlink Throughput (DL-Throughput) holds significant importance factors for network performance, DL-Throughput prediction can be used to evaluate the quality of cellular networks. Costa Rica, Venezuela, Brazil and some Caribbean countries or territories. Feb 5, 2017 · Step 1: Identify cell with low DL (downlink) throughput. LTE Throughput Calculator . Variations in throughput often limit the Quality of Experience (QoE) of a user . a) The first thing is to identify those cells with low throughput. Downlink (DL) operating band. #LTEOPTIMIZATION #LTE # LTESOFFPARAMETERSPoor CQI Reason in 4G & Optimization?https: Sep 12, 2020 · High PRB Utilization && Low User Number => that means serving UEs enjoying almost very satisfied throughput regarding to LTE 4G High PRB Utilization && Low DL Spectral efficiency The placement of the UE channel bandwidth for each UE carrier is flexible but can only be completely within the BS channel bandwidth. 83 for the downlink and 0. This throughput often get configured with the throughput calculated at the last step of this process. Mar 16, 2024 · Conversely, the VZW-n5 channel uses a higher proportion of QPSK and 16-QAM modes, which also explains the low normalized throughput of this channel. i) DL Bandwidth, Number of Transmit Antenna. 101 (Rel 18 Jun 2024) Display All FDD TDD SDL DL Increasing DL Decreasing UL Increasing UL Decreasing 1. 101: 5. LTE throughput calculation formula or equation Cell ID Calculator . 2. pdf from ITU 2 at Istanbul Technical University. Hence, estimation of The paper considers a multi-static target detection problem in cell-free massive MIMO ISAC system. 003 Mbps). Jan 2, 2024 · Throughput in LTE (Long-Term Evolution) refers to the actual data transfer rate or the amount of data transmitted over the network in a given time period. SmartPreAllocationDuration parameter and smart preallocation can be performed in DRX mode. 22 Mbps LTE throughput calculator formula. The preallocation duration is specified by the CellUlschAlgo. 83Mbps, there are 139 records. Improving Low DL Throughput in LTE. In 5G NR, the base station channel bandwidth can be greater than or equal to the UE channel bandwidth. 3 Carrier frequency and EARFCN. Previously I discussed LTE throughput that can be achieved in Downlink for LTE FDD case. Date: December 29, 2022 Author: diegogonkov 1 Comment. This parameter is taken with some inaccuracy, i. Dec 29, 2022 · 4G, LTE Throughput. 9–4. (The reason is same as above) iii) With low CQI, it is for sure that you cannot achieve the maximum throughput. DL It covers the same for 5G downlink throughput and 5G uplink throughput. Uplink Interference – LTE uplink interference is caused by UEs near the cell border. Throughput is a basic KPI on any LTE network. Duplex . There are many ways to optimize LTE throughput and I will try to cover all of them. And if DL HARQ RTT is 16ms and TCP RTT is 10ms, TCP throughput is decreased up to only Long-Term Evolution (LTE) cellular networks have transformed the mobile business, as users increasingly require various network services such as video streaming, online gaming, and video conferencing. Today, we will talk about How much throughput you can achieve (in theory) for LTE Downlink TDD scenario. Radar Cross Section figure (fig. PDCP, RLC and MAC). The Video covers LTE radio aspects such RS SINR, PDCCH Capacity, PUCCH Capacity, DL and UL d Networks on LTE bands 1, 3 (LTE-FDD) are suitable for roaming in ITU Regions 1, 3 and partially Region 2 (e. LTE throughput depends on the following parameters: Bandwidth; Channel quality Feb 12, 2015 · The maximum data rate depends on channel bandwidth. There are two types of frame structure in the LTE Long Term Evolution standard, Type 1 and Type 2. The numerous services brought to the users by 4G network have caused an increasing load demand. 9 to 0. The results in scenario 1 show that the normalized throughput of the implemented LTE ESPE network is 0. Nov 30, 2017 · Download Citation | Analysis of LTE Radio Load and User Throughput | A recurring topic in LTE radio planning pertains to the maximum acceptable LTE radio interface load, up to which a targeted This low throughput is due to this EARFCN using a channel bandwidth of 10 MHz. iv) Transmit every 40 ms , repeat every 10 ms . Mar 3, 2024 · LTE Throughput Optimization: Part 1 – PDCCH Capacity Enhancement. It describes 7 steps to troubleshoot downlink throughput, including identifying cells with low throughput, checking for interference, BLER values, MIMO parameters, scheduling, CQI reporting, and other issues. Networks on LTE band 5 (LTE-FDD) are suitable for roaming in ITU Regions 2 and 3. TDD throughput calculation is very similar to FDD case as you see below. This threshold is defined by your network policies and Feb 1, 2017 · Physical layer data throughput can be calculated accurately for different scenarios. Definition of Jul 12, 2022 · Long-Term Evolution (LTE) cellular networks have transformed the mobile business, as users increasingly require various network services such as video streaming, online gaming, and video conferencing. The SINR> 10dB and UL throughput< 0. Also Refer LTE throughput basics>> and LTE code rate calculator>> to understand the concept to derive TBS from This site is for everything on 4G/LTE. 08 Mbps. The User DownLink (UE DL) throughput is considered the most effective Key Performance Feb 25, 2020 · DL/UL Throughput , simultaneously For UE side testing one thing which is more important is testing majorly tested inside labs so need to introduce simulator and here comes the lab setup . As mentioned above, real max throughput for user data can vary greatly depending on how eNB schedule the DL / UL transmission. Let’s take the example for LTE using FDD, where channel bandwidth can be 5 MHz, 10 MHz and 20 MHz. The corresponding MCS cell range, SINR, DL throughput, and RSRP were observed at different MCS levels. LTE throughput calculator Introduction The post presents the simplest way how to calculate LTE throughput. up to only 36% of maximum bandwidth. eNB estimate of the throughput of PDCP SDU bits in uplink for packet sizes or data bursts (where a UL data burst is the collective data received while the eNB estimate of the UE buffer size is continuously above zero) that are large enough to require transmissions to be split across several TTIs, by excluding transmission of the last piece of data. Sep 1, 2014 · Cainey et al. DL throughput massive MIMO = DL UE1 +DL UE2 + Dl UE3… ( at our calculator you should to use this way) massive MIMO mean that different UE can use same RB ( different location, not only Mimo layer). 3. The document provides troubleshooting guidelines for downlink and uplink throughput issues in LTE networks with MIMO 2x2. Jan 2, 2024 · One obvious ML use case is modeling DL-Throughput since measurement data throughput has been the key metric recently [9,10,11]. In normal DL or UL subframe, TBS/subframe can be calculated in the same way as in FDD. So in this case, very high performance IP data server is the most important factor for In WCDMA, HSDPA, HSUPA probably 'Yes', but in LTE you would still have a little low throughput than the 3GPP spec value even in PHY throughput. F UL_low F UL_high. Q> What is the space between a subcarrier and the next sub carrier ? A> 15 Khz The DL and UL capacities (achievable throughput) are impacted by the total BW (1. Is one of the three major KPI, along with and latency and packet loss when we measured what it’s called “the integrity” network. If you look at the graph on the right, you can see that as the RSRP reduces, the throughput also reduces. However, min DL user throughput in L900 is between 1. e. In addition, Table 5 presents the statistics of measured RSRP, RSRQ, and the RSSI at Site 3, whereas, Table 6 gives the statistical Feb 3, 2022 · A 4G LTE network was implemented by using SDR and open-source LTE software. Thus, the ESPE LTE network was deployed and can be used as a testbed and a platform for teaching the LTE standard. 1 Mbps, as in Table 4. ngqfqr ovlvly cem ienn bqxi boduvrc dhooivd nnrm gqwp txzyiky