How to improve uplink throughput in lte. 122 Mbps. The quality of the up-link signal received by the eNB is improved due to a favorable . We develop several effective MCS selection schemes by using the effective packet-level SINR based on Feb 27, 2020 · An overview of capacity and data throughput optimisation in LTE. The mean SINR is 2. NR+LTE traffic aggregation has a big impact in the peak data rate. g, 100 Mbps and over) is pretty tough task not only for IP stack, but also the IP application software and CPU utilization. Uplink Peak Data Rate. 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 good radio condition 64QAM modulation will be used for downlink. There are 574 records left. Two sets of measurements were performed. Synchronous HARQ – used in LTE Uplink transmission. LTE Physical Layer Overview. Oct 22, 2017 · This article provides valuable insights into LTE throughput optimization, with a particular focus on PDCCH enhancements. Is one of the three major KPI, along with and latency and packet loss when we measured what it’s called “the integrity” network. HARQ for LTE Uplink and Downlink. It covers the same for 5G downlink throughput and 5G uplink throughput. 4, Analysis of the data . This ensures that both FDD LTE and TDD LTE are able to meet the high data throughput requirements placed upon them. Apr 29, 2015 · This paper investigates the uplink resource allocation problem in the context of Long-Term Evolution (LTE)-Advanced systems with carrier aggregation (CA) and dual-cluster scheduling. The ultimate goal is to support or make it suitable for the network planning and optimization of LTE. The physical uplink shared Channel (PUSCH) is used to transfer application data. Figure 1: Downlink OFDMA and Uplink SC-FDMA Downlink frame (OFDMA) Preamble Header Burst-1 Burst-2 Brust-3 ----- Uplink frame (SC-FDMA) Jun 11, 2016 · Even though if we think intuitively, Higher uplink transmission Power can solve the Uplink throughput and accessibility and retainability issues problems related to Performance and Optimization. Type 3 HARQ can support up to two retransmissions. Feb 5, 2017 · LTE THROUGPUT TROUBLE SHOOTING In this write up we will learn briefly general troubleshooting guidelines for downlink throughput in LTE networks with MIMO 2x2 The general troubleshooting strategy Nov 4, 2014 · With instant access in the uplink (= allowing the UE to transmit when it gets data on a pre-established grant) or by reducing the TTI and processing times to 1/2ms the download performance can be improved significantly, i. A. 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". Despite this flexibility, scheduling in LTE is a challenging functionality to design Dec 26, 2023 · The LTE frequency band is divided into subcarriers, and a PRB represents a specific set of these subcarriers. • Increase the uplink and downlink throughput by sending less uplink data same amount of information (on downlink the benefits come from shorter TCP ACKs, needed for the same amount of downlink data). Feb 24, 2017 · Assuming you are interested in LTE, some LTE frequencies aren't in this range. 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 Jan 11, 2024 · Although similar to DL throughput, UL throughput has special considerations to take when analyzing performance issues on a network. Jan 19, 2021 · For a single LTE interface on a mobile bonding router, we study end-to-end delay jitter seen by a constant bit rate (CBR) traffic under the uplink (synchronous non-adaptive) hybrid-automatic repeat request (HARQ)-controlled transport block (TB)-based scheduling. In LTE release 8 there is no carrier aggregation, so let’s just consider simple cases. 1-2 for Uplink Throughput). The Video covers LTE radio aspects such RS SINR, PDCCH Capacity, PUCCH Capacity, DL and UL d Coordinated Multi-Point Transmission and Reception (CoMP) has been regarded as an important component for Long Term Evolution-Advanced (LTE-A) which is currently standardized in the Third Generation Partnership Project (3GPP). the maximum LTE link throughput of 150Mbit/s as assumed in this example can be utilized more effectively Jun 21, 2021 · Effective management of radio resources and service quality assurance are two of the essential aspects to furnish high-quality service in Long Term Evolution (LTE) networks. Relay assistance on the up-link occurs when the evolved Node B (eNB) requests a retransmission (HARQ) from the UE at which point the UE and relay transmit simultaneously. 83Mbps, there are 139 records. Reducing the number of RB occupied by PRACH can save more RB for PUSCH, which can result in larger throughput per TTI and increase uplink peak rate. With OFDMA in the downlink and SC-FDMA in the uplink, LTE possesses a robust and adaptive multiple access scheme that facilitates many physical layer enhancements. Uplink interference in 4G systems: Distinctive Properties Uplink interference in cellular systems is managed through careful power control which has been a topic of extensive research for more than two decades (see Section II). Actually the calculation is too simple, […] Nov 13, 2019 · LTE uplink interference is caused by UEs near the cell border. As LTE uses different channel bandwidths both for FDD and TDD. Besides LSTM Jun 11, 2017 · Physical optimization(M. uplink interference management in LTE. Feb 12, 2015 · The maximum data rate depends on channel bandwidth. Sep 10, 2013 · The unique characteristics of LTEs modulation and UL resource assignment poses considerable challenges in achieving this goal because most LTE deployments have 1:1 frequency re-use, and the uplink The past decade has witnessed a staggering evolution in cellular networks. 306-Table 4. UL channels PUSCH (physical uplink shared channel), PUCCH (physical uplink control channel) and SRS (sounding reference signal) largely follow similar baseline methods as specified in 3GPP TS 38. There are 98 records. In order to reach the desired performance, uplink power control is Mar 22, 2023 · Making the most of your cellular signal and increasing your 5G, 4G, and LTE data speeds can really make a difference in everyday life. This work Jul 31, 2011 · In this paper, we investigate resource block (RB) assignment and modulation-and-coding scheme (MCS) selection to maximize downlink throughput of long-term evolution (LTE) systems, where all RB's assigned to the same user in any given transmission time interval (TTI) must use the same MCS. It is a critical metric that directly impacts the user experience and the efficiency of the wireless network. Nov 13, 2020 · The three algorithms were implemented in the Vienna LTE-A Uplink Simulator v1. tilt and E Tilt) will always help to get a godo RSRP and throughput. Oct 15, 2020 · A new approach is proposed to increase uplink traffic throughput of a timedivision duplex (TDD) system, e. Specifically, the PUCCH parametersof an uplink channel between the UE in the TDD system are Jan 2, 2024 · The current and next generations of cellular networks produce a massive amount of data. g. Uplink power control (UL-PC) is critical for a good balance of coverage and capacity in the uplink path. The idea of reducing PDCCH resources to increase PDSCH resources and subsequently improve data transmission per subframe is intriguing. The qualitative behavior of the delay jitter is studied experimentally and it is observed that the delay jitter is not a function of It is recommended to read OFDMA/SC-FDMA sections to clearly understand throughput calculation in LTE. 213. In the baseline method, there are certain parameters carried It is proposed that up-link relays be used to improve the data throughput for user equipment (UE) near the cell edge in a LTE network. LTE uplink is higher than NR NSA uplink due to the TDD technique vs FDD. 4G LTE carrier aggregation basics. Feb 5, 2024 · Let’s understand the various factors impacting the spectral efficiency and ways to perform LTE throughput optimization. Distance from cell, max number of active UE are responsible for poor throughput. There has been a series of posts for LTE Throughput computation in both FDD and TDD. The numerous services brought to the users by 4G network have caused an increasing load demand. Improve the TDD competitiveness with respect to FDD deployment, as HPUE will provide a 3dB power • Increase uplink capacity when the amount of data sent in uplink is reduced. Uplink data rate is a critical KPI in industry applications validated at 5G EVE. 5 kHz, depending on the LTE channel bandwidth. Let’s assume, the UE is in good radio condition and its capability is available for 150 Mbps for downlink and 50 Mbps for uplink. In LTE, end user quality of service is impacted by the cumulative effect of various nodes and interfaces. Additional assumption about the UL MIMO throughput is that each Component Carrier has the same configuration so the throughput increase is in direct proportion to the number of RF carriers. Case 1: 4CC CA - 2x2 (64 QAM) + 2x2 (64 QAM) + 2x2 (64 QAM) + 2x2 (64 QAM) Oct 21, 2019 · Improve Uplink throughput Reconfigure the physical random access channel (PRACH): As per the structure of uplink physical channel, resource block (RB) is occupied by PRACH, PUSCH, PUCCH and SRS. Oct 31, 2016 · The asymmetry tends to cause the uplink congestion and uplink resource shortage for TCP ACK transmission, which has a negative impact on the TCP RTT. Subcarrier Spacing: The subcarrier spacing in LTE can be either 15 kHz or 7. The smartphones were connected to the internet via an LTE lab network, where the uplink and downlink speeds of each device’s connection were controlled. UL RSSI that is too high will contribute to poor network quality. The target figures for data throughput in the downlink is 1 Gbps for 4G LTE Advanced. Optimization. For the first set, the downlink speed was unrestricted while the uplink was set to a range of speeds by blocking LTE radio resources. Sep 2, 2020 · In this video, we describe the use of DMRS, SRS in UL LTE and how it is related to uplink throughput and overhead in PDCCH and PDSCH. , a TD-LTE (A) system, by configuring a plurality ofPUCCH parameters for an UE in the TDD system. 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. Throughput Optimization. For TDD Case: You can find them. In addition, these cellular networks are unmanaged with conventional techniques, and a more advanced design and optimization methodology that depends on Machine Learning (ML) models is necessary. For more videos, please Jul 26, 2021 · An example of a work incorporating low aggregated traffic is [14], which analysed downlink and uplink throughput generated by remotely controlled vehicles in LTE and 5G networks. It describes checking for interference, high BLER, low user demand, improper scheduler settings, low power headroom, backhaul capacity issues, and equipment problems. Downlink and uplink are focused within the scope of this paper. Despite the base station involving several ingenious scheduling schemes for resource allocation, the intended outcome might be influenced by the interference, especially in heterogeneous scenarios, where many kinds of Jun 7, 2017 · CA is supported by both formats of 4G LTE, namely the FDD and TDD variants. On one hand, these Rel’10 functionalities can increase the available transmission bandwidth and scheduling flexibility in uplink. However, uplink interference in LTE networks needs to be managed over Mar 30, 2023 · The base station can combine the original data with the retransmission to improve the signal quality. More and more people are using 4G LTE or 5G as a primary internet connection, so getting the fastest speeds is essential. Jun 27, 2011 · I like to focus on LTE capacity in the next few blog entries and present what can realistically be obtained. When RSRP < -120dB, the mean throughput is 0. 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. 08 Mbps. This definition is important as we need to… The radio interface of LTE is based on Orthogonal Frequency Division Multiple Access (OFDMA) in the downlink and Single Carrier-Frequency Division Multiple Access (SC-FDMA) in the uplink. HERE, HERE, HERE and HERE. There is not one factor, but a number Dec 29, 2022 · Throughput is a basic KPI on any LTE network. Today is the start of uplink throughput computation. This post is to address common issues that affects downlink throughput and also to dig into possible solutions. When a UE is at the cell border it will need to be transmit a strong signal to reach the tower. On the other hand, they will introduce additional power back-off for the power The document outlines steps to diagnose and resolve low uplink throughput issues in a cellular network. In this paper, we propose methods to improve the TCP throughput focusing on the TCP ACK filtering in the LTE-A Pro uplink. So, in stead of directly jumping into max throughput test, increase the throughput step-by-step and check CPU utilization (e. This increasing demand in Nov 16, 2022 · E. Nov 16, 2022 · In such complex scenarios, fine-grained tuning of network configuration may be necessary to maximize quality of service (QoS) for the receiving application or use case. For network operators, erring on capacity expectations has negative consequences as capacity fundamentally impact LTE network base on live data and to examine the validity of different downlink throughput and inter-site distance in a realistic LTE deployment. This doesn't mean the model won't give you similar results, but the authors of this model don't claim to model for those frequencies of interest (the ones outside 2-6 GHz) Basically the throughput and transport block size at this layer for Category 12 is same as Category 11. There are 116 records. CoMP is mainly expected to increase cell-edge User Equipment (UE) throughput and/or system throughput. A stronger signal also includes more noise, and will thus increase the noise floor of all users inside the cell. With this vast parameter increase, cellular communication networks have grown incredibly complicated. The differences between Category 11 and 12 for Downlink lies in the layer higher than PHY/MAC and Uplink PHY/MAC throughput(See 36. Let's delve into the technical details LTE level throughput (e. , UE1 is directed to reduce the power while UE2 is asked to increase the power. Otherwise, below are the quick steps you can take note of and start investigating when it comes to improving LTE Throughput. Dec 18, 2013 · The choice of OFDM-based multi-carrier access techniques for LTE marked a fundamental and farsighted parting from preceding 3GPP networks. I have seen wild figures, mainly pushed by system vendors and consumed by many operators, journalist and writers who like to wow readers of the promise of new technologies. However, the downside is, it will not only drain UE battery, plus it will result increase in inter and intra cell interference as well. to improve the link level th roughput and decrease improvement in the system throughput at the link The uplink (UL) Received Signal Strength Indicator, or RSSI, indicates the total wideband received power within the entire channel bandwidth. 72, the record is as below: When -115dB <=RSRP <= -120dB, the mean throughput is 0. Let’s take the example for LTE using FDD, where channel bandwidth can be 5 MHz, 10 MHz and 20 MHz. 5. There are two types of frame structure in the LTE Long Term Evolution standard, Type 1 and Type 2. g, you can monitor the CPU utilization using Windows Task Manager) The SINR> 10dB and UL throughput< 0. The values shown above for the case of MIMO are double or 4 times compared to non-MIMO scenario. Interference caused by the high noise floor can lead to frequent dropped calls, call setup failure, and poor voice quality. e. Asynchronous HARQ – used in LTE Downlink transmission. The case study found low power headroom due to an antenna equipment issue, and replacing the equipment significantly improved This page describes 5G Throughput Test case, Test procedure and minimum conformance requirements. If all network parameters are well set then azimuth as per the traffic density can help. The standard channel bandwidths in LTE are divided into PRBs, and each PRB consists of 12 subcarriers. Increase device uplink transmit power to afford significant uplink coverage extension, thus reducing the performance gap between DL and UL in LTE-TDD networks. wscwzr szfklfm ivatbva zcocu liqyzqxe agbcbpx gnu yuxv oyv ifjh