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Lte low dl throughput
Lte low dl throughput. Networks on LTE bands 1, 3 (LTE-FDD) are suitable for roaming in ITU Regions 1, 3 and partially Region 2 (e. 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. 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. a) The first thing is to identify those cells with low throughput. 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. LTE throughput calculator EXAMPLE: Input : MCS = 10, PRBs = 20, Number of MIMO Antennas = 2 Outputs : LTE throughput = 6. 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. It is a critical metric that directly impacts the user experience and the efficiency of the wireless network. So, it is very likely that you would see low CQI when you see throughput drop in livenetwork test. 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. DL Latency and DL Latency and RLC retransmission RLC retransmission High value of DL latency(>9ms) and RLC retransmission(> 1%) High value of DL latency(>9ms) and RLC retransmission(> 1%) would impact DL throughput. LTE Throughput Calculator . 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. 22 Mbps . Q> What is the space between a subcarrier and the next sub carrier ? A> 15 Khz 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. In LTE release 8 there is no carrier aggregation, so let’s just consider simple cases. Let’s take the example for LTE using FDD, where channel bandwidth can be 5 MHz, 10 MHz and 20 MHz. g, you can monitor the CPU utilization using Windows Task Manager) 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 . However, min DL user throughput in L900 is between 1. 9–4. The throughput at the last step in the process can be defined as physical layer throughput. 3. It is because there is some subframes where you cannot allocate full RBs (100 RBs in case of 20Mhz, Cat 3). Example 1 > Throughput, CQI, BLER while driving on a highway Apr 7, 2013 · DL and UL throughput calculation for LTE LTE system uses OFDMA as access technology in downlink to TDD increase the spectral efficiency and SC-FDMA in uplink due to low 9. If coverage (RSRP) is bad, the throughput will be bad. The corresponding MCS cell range, SINR, DL throughput, and RSRP were observed at different MCS levels. 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". PDCP, RLC and MAC). Various Machine Learning (ML) models utilized Long-Term Evolution (LTE) data measurements for the prediction process. 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). real user bit rate will be a bit lower). Another notice is calculated throughput includes LTE headers (i. In reality throughput will be a bit lower due to increased number of pilot signals. This post is to address common issues that affects downlink throughput and also to dig into possible solutions. Oct 22, 2017 · Thank you for sharing this insightful article on LTE throughput optimization and the role of PDCCH enhancements in achieving it. This threshold is defined by your network policies and Feb 1, 2017 · Physical layer data throughput can be calculated accurately for different scenarios. 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. Dec 29, 2022 · 4G, LTE Throughput. SmartPreAllocationDuration parameter and smart preallocation can be performed in DRX mode. g, 100 Mbps and over) is pretty tough task not only for IP stack, but also the IP application software and CPU utilization. 36. LTE throughput calculation formula or equation LTE throughput calculator Introduction The post presents the simplest way how to calculate LTE throughput. ii) Low throughput does not necessarily mean low CQI. 4. In normal DL or UL subframe, TBS/subframe can be calculated in the same way as in FDD. 9 to 0. com Feb 5, 2024 · Let’s understand the various factors impacting the spectral efficiency and ways to perform LTE throughput optimization. The quality of DL-Throughput is a critical element for video streaming and gaming. #LTEOPTIMIZATION #LTE # LTESOFFPARAMETERSPoor CQI Reason in 4G & Optimization?https: Sep 15, 2022 · The first issue is simple. So in this case, very high performance IP data server is the most important factor for 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]. 5ms 🔘 Symbol duration = 0. Dec 29, 2022 · Throughput is a basic KPI on any LTE network. 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 Cell ID Calculator . LTE General . Use this calculator to calculate LTE throughput, and carrier aggregation Throughput. CEUs also have very low DL throughput during peak hours in the three bands (from 0. Since throughput is a major indicator of the network's performance, throughput modelling and prediction can be utilized for analyzing network quality. 2 and 2. The placement of the UE channel bandwidth for each UE carrier is flexible but can only be completely within the BS channel bandwidth. The following calculations are made for user data bit rates on IP layer (including IP headers and LTE overhead, i. This parameter is taken with some inaccuracy, i. 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. Which means that in LTE you will have even bigger TBS than HSPA+ Dual Carrier. TDD throughput calculation is very similar to FDD case as you see below. Sep 1, 2020 · In the first cluster, min DL throughput in L2100 has a range of 2. Jun 18, 2024 · Bandwidth check LTE frequency band 36. Is one of the three major KPI, along with and latency and packet loss when we measured what it’s called “the integrity” network. Simply select network type and type in the LCID/CID. What is Throughput? • The term throughput refers to ratio of data transmitted in unit of time. In this paper, two approaches for throughput analysis are examined: classical machine learning and time series forecasting. Jan 11, 2024 · Although similar to DL throughput, UL throughput has special considerations to take when analyzing performance issues on a network. The measured data were then compared with the 3GPP theoretical values in Sect. Feb 5, 2017 · Step 1: Identify cell with low DL (downlink) 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. 5 Mbps during peak, and that’s not very bad for medium traffic volume in this cluster. Networks on LTE band 20 (LTE-FDD) are suitable for roaming in ITU Region 1 only. 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. 1 Mbps, as in Table 4. Use this page calculate things such as eNB ID/RNC-ID/BSIC or hex values of IDs. Conclusion Peak to Average Power ratio (PAPR) advantage. Note: In 4G LTE, there is a one-to-one mapping between base station channel bandwidth and UE channel bandwidth. 7. Date: December 29, 2022 Author: diegogonkov 1 Comment. 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. 4 MHz 3 MHz 5 MHz 10 MHz 15 MHz 20 MHz It covers the same for 5G downlink throughput and 5G uplink throughput. There are many way to improve throughput in 4G Huawei such as:Bandwidth Upgrade,Sharing traffic 4G-3G,sharing traffic 4G-4G(High traffic 4G cells to surroundings low traffic), Parameter adjustment such as:activate EPFENHANCEDSWITCH,Clearing overshooting,Upgrade transmission 🔘 LTE Radio Frame duration = 10ms 🔘 Sub-frame duration = 1ms 🔘 Time Slot duration = 0. Space between the chhanel and the next channel is always same regardless of the system bandwidth of the LTE band. May 31, 2019 · Low DL throughput is the major issues in any LTE network, there are few steps that can be taken whenever we troubleshoot low DL throughput in the network. initial throughput is multiplied by 2 or 4 either MIMO 2x2 or MIMO 4x4 selected, respectively. Сalculator allows to calculate the maximum throughput of 4G LTE network for DL (downlink) and UL (uplink) Throughput Calculation - TDD . LTE throughput depends on the following parameters: Bandwidth; Channel quality pmBadCovEvalReport indicates poor DL coverage. The breakdown of PDCCH structure and its aggregation layers provided a clear understanding of how scheduling allocations work for PDSCH and PUSCH, making it easier to comprehend the overall optimization process. Jul 1, 2023 · With the enormous evolution of the smartphone, especially with the appearance of the fourth generation (4G) cellular networks, the demand for high-speed data rate, low latency, and video streaming Oct 21, 2019 · Smart preallocation is automatically started once there DL data transmission. 1 Mbps). Throughput is a basic KPI on any LTE network. (The reason is same as above) iii) With low CQI, it is for sure that you cannot achieve the maximum throughput. Another difference is about TBS each subframe as marked in blue. The key difference is 'number of subframes /sec' parts as marked in red. 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. #LTELowThroughput #4GLowThroughput#CQI #4GCQISubscribe Like & Share. As LTE uses different channel bandwidths both for FDD and TDD. So, in stead of directly jumping into max throughput test, increase the throughput step-by-step and check CPU utilization (e. This throughput often get configured with the throughput calculated at the last step of this process. If you look at the graph on the right, you can see that as the RSRP reduces, the throughput also reduces. 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. • The unit of throughput is bits per second or bps. Improving Low DL Throughput in LTE. . 101 (Rel 18 Jun 2024) Display All FDD TDD SDL DL Increasing DL Decreasing UL Increasing UL Decreasing 1. Networks on LTE band 5 (LTE-FDD) are suitable for roaming in ITU Regions 2 and 3. Costa Rica, Venezuela, Brazil and some Caribbean countries or territories. 101: 5. The preallocation duration is specified by the CellUlschAlgo. 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 . 3-1 and NDL is the downlink EARFCN. 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. Original code from Github. See full list on techtrained. This work models and predicts the DL-Throughput by utilizing LTE data measurements to train supervised ML models. In 5G NR, the base station channel bandwidth can be greater than or equal to the UE channel bandwidth. 4G LTE Throughput calculator. Feb 12, 2015 · The maximum data rate depends on channel bandwidth. In order to determine physical layer performance, we need to calculate the total physical resources available for different bandwidths of downlink transmission. DL LTE level throughput (e. 3 Carrier frequency and EARFCN. would impact DL throughput. g. Nov 22, 2017 · In This Chapter I would like to share about LTC improvement by traffic sharing/offload traffic 4G-4G in Huawei 4G LTE. e. So if the system bandwidth of LTE channel changes, number of the channels (sub carriers) changes but the space between channels does not change.
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