How to improve uplink throughput in lte

How to improve uplink throughput in lte. 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. When a UE is at the cell border it will need to be transmit a strong signal to reach the tower. Despite this flexibility, scheduling in LTE is a challenging functionality to design The LTE specification provides downlink peak rates of 300 Mbit/s, uplink peak rates of 75 Mbit/s and QoS provisions permitting a transfer latency of less than 5 ms in the radio access network. 1. The qualitative behavior of the delay jitter is studied experimentally and it is observed that the delay jitter is not a function of This page describes 5G Throughput Test case, Test procedure and minimum conformance requirements. 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. 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. In LTE release 8 there is no carrier aggregation, so let’s just consider simple cases. LTE-Advanced supports single user MIMO (SU-MIMO) scheme up to eight layers (8x8 MIMO) for downlink and four layers (4x4 MIMO) for uplink. Synchronous HARQ – used in LTE Uplink transmission. Jul 1, 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 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. It implies that this is some additional rule to convert the Q'm to Qm. It is a critical metric that directly impacts the user experience and the efficiency of the wireless network. 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 scenarios are considered. 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. UL RSSI that is too high will contribute to poor network quality. If all network parameters are well set then azimuth as per the traffic density can help. Increase device uplink transmit power to afford significant uplink coverage extension, thus reducing the performance gap between DL and UL in LTE-TDD networks. —Table showing MIMO configurations for LTE, LTE Advanced and LTE Advanced Pro— 4G LTE and LTE Advanced networks use many techniques to improve the channel bandwidth and bit rates. Subcarrier Spacing: The subcarrier spacing in LTE can be either 15 kHz or 7. Relay assistance on the up-link occurs when the evolved Node 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. 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. 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. Jan 11, 2024 · Although similar to DL throughput, UL throughput has special considerations to take when analyzing performance issues on a network. LTE transmits data by dividing it into slower parallel paths that modulate multiple subcarriers in the assigned channel. They can do so by acting on multiple fronts: Using new technologies like long-term evolution (LTE) and eventually upgrading to LTE Advanced Adopting a frequency reuse of 1 (using the same spectrum channel for Dec 26, 2023 · The LTE frequency band is divided into subcarriers, and a PRB represents a specific set of these subcarriers. 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. Actually the calculation is too simple, […] 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. LTE Metrics including RSRP, RSRQ and SINR LTE Cellular Networks. For the coverage-limited scenario LTE link budget is compared to that of 3GPP Release 8 HSPA+ with 2x2 MIMO. The values shown above for the case of MIMO are double or 4 times compared to non-MIMO scenario. LTE has the ability to manage fast-moving mobiles and supports multi-cast and broadcast streams. The differences between Category 11 and 12 for Downlink lies in the layer higher than PHY/MAC and Uplink PHY/MAC throughput(See 36. Mar 30, 2023 · The base station can combine the original data with the retransmission to improve the signal quality. Dec 18, 2013 · The choice of OFDM-based multi-carrier access techniques for LTE marked a fundamental and farsighted parting from preceding 3GPP networks. Today is the start of uplink throughput computation. On the other hand, they will introduce additional power back-off for the power Basically the throughput and transport block size at this layer for Category 12 is same as Category 11. In LTE, end user quality of service is impacted by the cumulative effect of various nodes and interfaces. Distance from cell, max number of active UE are responsible for poor throughput. We develop several effective MCS selection schemes by using the effective packet-level SINR based on Jan 8, 2013 · 1. HERE, HERE, HERE and HERE. Throughput Optimization. 306-Table 4. < Uplink MCS > Following is the mapping table for PUSCH (Uplink). For the first set, the downlink speed was unrestricted while the uplink was set to a range of speeds by blocking LTE radio resources. 4, Analysis of the data . In this paper, we propose methods to improve the TCP throughput focusing on the TCP ACK filtering in the LTE-A Pro uplink. On one hand, these Rel’10 functionalities can increase the available transmission bandwidth and scheduling flexibility in uplink. The physical uplink shared Channel (PUSCH) is used to transfer application data. 8 supported up to four layers of MIMO multiplexing for downlink and no MIMO for uplink. g. As LTE uses different channel bandwidths both for FDD and TDD. When RSRP < -120dB, the mean throughput is 0. There are two types of frame structure in the LTE Long Term Evolution standard, Type 1 and Type 2. Jan 2, 2024 · The current and next generations of cellular networks produce a massive amount of data. HARQ for LTE Uplink and Downlink. Sep 12, 2020 · High PRB Utilization && Low User Number => that means serving UEs enjoying almost very satisfied throughput regarding to LTE 4G Signal they can see in their handsets. For TDD Case: You can find them. In case of R99 or HSPA, the ideal throughput is described in a neat page of table and a lot of people knows what kind of throughput they have to expect, but in LTE the situation got much more complicated since there can be several factors determines the throughput and each of the factors can have so many different values. 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. Optimization. For the detailed data path for LTE, you can refer to another pages of this site. 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 data is transmitted in segments of one symbol per segment over each 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. 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". • 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). Specifically, the PUCCH parametersof an uplink channel between the UE in the TDD system are Oct 21, 2019 · improve of CA user throughput; Coverage Based HO (choose between UTRAN and Geran; cell reselection criterion and process; UL Throughput Improvement; improve DL throughput based on variable target IBLER; Improving LTE Uplink and Downlink Throughput durin how to guarantee some VIP user’s throughput in LTE Some TM is designed mainly to increase throughput, some are to increase communication reliability and some are to handle multiple users simultaneously etc. If you look at the table carefully, you would notice that the modulation parameter is Q'm (Q prime m), not Qm. g, you can monitor the CPU utilization using Windows Task Manager) 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. This work 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. There are 574 records left. Interference caused by the high noise floor can lead to frequent dropped calls, call setup failure, and poor voice quality. g, 100 Mbps and over) is pretty tough task not only for IP stack, but also the IP application software and CPU utilization. Besides LSTM Sep 1, 2011 · 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. Asynchronous HARQ – used in LTE Downlink transmission. Summary: RSRQ and SINR are key metrics for LTE systems including CableFree LTE-A Infrastructure. 213 Table 8. 83Mbps, there are 139 records. LTE Physical Layer Overview. 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. With this technology, it achieves peak spectral efficiency of 30 bit/s/Hz for downlink and 15 bit/sec/Hz for uplink. The target figures for data throughput in the downlink is 1 Gbps for 4G LTE Advanced. , a TD-LTE (A) system, by configuring a plurality ofPUCCH parameters for an UE in the TDD system. 1-1 > Which means that in LTE you will have even bigger TBS than HSPA+ Dual Carrier. When a UE is at the cell border it will need to transmit a strong signal to reach the tower. 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. e. 4G LTE carrier aggregation basics. Let's delve into the technical details • Small variation in Uplink throughput is more significant than in Downlink: Improvement DL from 712 Mbps to 875 Mbps = 163 Mbps ( 23 % increase) Improvement UL from 54 Mbps to 120 Mbps = 66 Mbps (122 % increase) • This significant improvement in Uplink Throughput has a very relevant There has been a series of posts for LTE Throughput computation in both FDD and TDD. The standard channel bandwidths in LTE are divided into PRBs, and each PRB consists of 12 subcarriers. 213 8. The physical-layer UL transmission technology is based on single-carrier frequency-division multiple access (SC-FDMA) with frequency Nov 13, 2019 · LTE uplink interference is caused by UEs near the cell border. The document outlines steps to diagnose and resolve low uplink throughput issues in a cellular network. Let’s take the example for LTE using FDD, where channel bandwidth can be 5 MHz, 10 MHz and 20 MHz. It describes checking for interference, high BLER, low user demand, improper scheduler settings, low power headroom, backhaul capacity issues, and equipment problems. The quality of the up-link signal received by the eNB is improved due to a favorable To increase capacity, operators have to increase spectral efficiency – packing more and more traffic into the spectrum they own. < 36. Type 3 HARQ can support up to two retransmissions. This definition is important as we need to… In this paper we propose an improved uplink power control method for CoMP system that adjusts the parameters in the uplink power control formula of LTE system to improve cell-edge throughput and reduce the UE transmit power with almost no reduction of the system throughput. The first step is to identify the counters that are part of the indicator, and analyze how they are stepped. To understand this better, we start by making two observa-tions. In LTE – as any wireless system – the performance has a direct relationship with the RF conditions at the time. Improve the TDD competitiveness with respect to FDD deployment, as HPUE will provide a 3dB power uplink interference in LTE networks needs to be managed over multiple narrow bands (each corresponding to collection of a few sub-carriers) over the entire bandwidth, thus giving rise to unique research challenges. Firstly, the uplink data rate of a user in LTE depends Dec 29, 2022 · This post is to address common issues that affects downlink throughput and also to dig into possible solutions. 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. The case study found low power headroom due to an antenna equipment issue, and replacing the equipment significantly improved Feb 1, 2017 · LTE Rel. Mar 27, 2015 · This paper studies the achievable rate and power allocation to improve the uplink (UL) spectrum efficiency in a Long-Term Evolution Advanced (LTE-A) cooperative cellular network with the deployment of Type-II in-band decode-and-forward (DF) relay stations (RSs). The idea of reducing PDCCH resources to increase PDSCH resources and subsequently improve data transmission per subframe is intriguing. Otherwise, below are the quick steps you can take note of and start investigating when it comes to improving LTE Throughput. 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 It is recommended to read OFDMA/SC-FDMA sections to clearly understand throughput calculation in LTE. This approach can also be extended to any other KPI you want to improve. As expected, the NR mid-band channels perform exceedingly well in downlink and uplink compared to other NR and LTE channels. There is not one factor, but a number Mar 3, 2024 · This article provides valuable insights into LTE throughput optimization, with a particular focus on PDCCH enhancements. 122 Mbps. So in this case, very high performance IP data server is the most important factor for throughput test. 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. 08 Mbps. In good radio condition 64QAM modulation will be used for downlink. the maximum LTE link throughput of 150Mbit/s as assumed in this example can be utilized more effectively 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. Feb 5, 2024 · Let’s understand the various factors impacting the spectral efficiency and ways to perform LTE throughput optimization. Figure 1: Downlink OFDMA and Uplink SC-FDMA Downlink frame (OFDMA) Preamble Header Burst-1 Burst-2 Brust-3 ----- Uplink frame (SC-FDMA) • Increase uplink capacity when the amount of data sent in uplink is reduced. This page explains the technical differences. Uplink Interference – LTE uplink interference is caused by UEs near the cell border. . 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. Uplink power control (UL-PC) is critical for a good balance of coverage and capacity in the uplink path. 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. MIMO is one such technology that enhances the transmission layers by deploying multiple antennas both for transmission and reception. 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 Jun 11, 2017 · Physical optimization(M. Aug 5, 2024 · Carrier aggregation is a familiar and widely used feature in the downlink to boost speeds, and it has greater device support than the other two 5G SA uplink features; SRG described it as a “nice complement to UL-MIMO, delivering much higher throughput in those areas where there wasn’t support for two uplink layers. 5 kHz, depending on the LTE channel bandwidth. Let’s take a look of how throughput is commonly LTE level throughput (e. The SINR> 10dB and UL throughput< 0. Jun 7, 2017 · CA is supported by both formats of 4G LTE, namely the FDD and TDD variants. Two sets of measurements were performed. This ensures that both FDD LTE and TDD LTE are able to meet the high data throughput requirements placed upon them. However, the downside is, it will not only drain UE battery, plus it will result increase in inter and intra cell interference as well. There are 98 records. The method is only suitable for CoMP uplink Joint Reception (JR) scenario. 1-2 for Uplink Throughput). This rule is described at the beginning of 36. With this vast parameter increase, cellular communication networks have grown incredibly complicated. In this section, I would show you some examples showing the increased communication reliability with a couple of different Transmission Mode. So, in stead of directly jumping into max throughput test, increase the throughput step-by-step and check CPU utilization (e. Almost whole of this site is about LTE. tilt and E Tilt) will always help to get a godo RSRP and throughput. There are 116 records. ” Feb 12, 2015 · The maximum data rate depends on channel bandwidth. Mar 16, 2024 · (1) Comparison of throughput performance between NR and LTE (§ IV-C: We perform a comparative analysis of throughput over the representative low- and mid-band channels in NR and LTE. A stronger signal also includes more noise, and will thus increase the noise floor of all users inside the cell. It covers the same for 5G downlink throughput and 5G uplink throughput. Case 1: 4CC CA - 2x2 (64 QAM) + 2x2 (64 QAM) + 2x2 (64 QAM) + 2x2 (64 QAM) Oct 15, 2020 · A new approach is proposed to increase uplink traffic throughput of a timedivision duplex (TDD) system, e. The mean SINR is 2. 6.