Low dl lte parameters. Real Time. 1, given below: Duplexing: FDD, TDD, half-duplex FDD Jan 2, 2024 · Therefore, cellular operators consider DL-Throughput one of the most crucial key performance parameters for LTE network planning [5,6,7,8]. Jul 5, 2024 · RSSI for LTE is a calculated from several other signal related measurements: RSSI = wideband power = noise + serving cell power + interference power. RSRP – The average power received from a single Reference signal, and Its typical range is around -44dbm (good) to -140dbm(bad). It seems the number of RB in in PCI A is just a little bit less than the other sectors, but not as much difference as to explain the DL MAC throughput difference. 5 and 1 Mbps at (1 AM, 5 PM) for the number of UEs in a range of 41–93% from total recorded UEs. It enhances throughput by enabling the simultaneous use of multiple frequency bands. Jan 11, 2024 · Resources demand (very high and low demand) Low power headroom; Other (VSWR, backhaul capacity, etc. Hence, the decoding of PDCCH is extremely important and that is why it uses a special structure which is different than other channels. Jan 1, 2018 · Long Term Evolution (LTE) is the next generation wireless broadband technology which is capable of delivering high data transmission rates and low latency with reduced costs. Amongst the target use models of 5G, ultra-reliable low latency (URLLC) applications that are highly sensitive to latency must target a BLER between 10-9 to 10-5 for latency <1 msec vs. Based on the parameters of physical layer proposed in 3GPP standard Releases, various Parameters Description; Frequency range: UMTS FDD bands and TDD bands defined in 36. Feb 1, 2020 · Parameters for data collection The parameters measured and tested comprise of the key performance indicators such as the Reference Signal Received Power (RSRP), Signal-to-Interference-plus-Noise Ratio Jan 18, 2024 · DL represents the transmission of data from the eNodeB to the UE, while UL represents the transmission of data from the UE to the eNodeB. RSRQ = -16 dB. Default: 1. In Section 2, introduction to passive radar is presented. The LTE FDD 2×2 MIMO DL (LTE TDD 2×2 MIMO DL) option supports throughput measurements for 2×2 MIMO downlink signals connected with the MT8820C. An initial BWP, denoted as BWP #0, is configured for this purpose. Downlink Power Control. Jul 7, 2017 · Overhead resource elements (REs) in Long Term Evolution (LTE) networks are used for some control, signaling and synchronization tasks at both the Physical level and Media Access Control sub-level. Adding new frequency bands to existing deployments is a future-proof and cost-efficient way to improve performance, meet the growing needs of mobile broadband subscribers and deliver new 5G-based services. Keywords Throughput, Downlink, Uplink, MIMO, data rate. 304 5. I will just explain with an example. 101(v860) Table 5. 15. If the Pa is -3 and Pb is 1, then that means that the Reference Signals will be having 3 dB higher power than the PDSCH symbols. The model grouped the cells based upon the parameters like downlink throughput or peak hours. Thes e parameters inc lude the effect of the Hybrid Adaptive Repeat and Request hencefor th The key parameters of LTE passive radar along with the signal processing details are also discussed. Althoug RSSI is not relevant in LTE it can be calculated from other parameters. parameters in TK and Sect. In downlink (DL), OFDMA wireless access network is utilized such that sub channels (carriers) are unit reciprocally orthogonal to every alternative, suggesting Detailed explanation of parameters used in detailed view(LTE) The basic cell information. However, thirty-two (32) parameters were logged during the field data collection. How Cell Reselection Priority is determined ? There are roughly three different ways of informing UE of Reselection Priority as listed before : (refer to 36. This paper reviews basics of radio planning for 3GPP LTE. APN-AMBR: APN-AMBR for downlink = 4864000000 bits. In addition, LTE air Sep 14, 2019 · Moreover, LTE attach request, Average LTE UEs (User Equipment's) connected and number of PDN (Packet Data Network) sessions are other important parameters, which will be considered in this paper. 2 but on the same RSRP, the UE might have packet losses on WB 23. In order to get the best performance out of an LTE network, it needs to be optimized continuously. 3 (LTE Forum Documents). e, Carrier Aggragation) you woud need to use the channel number startimg from the number in column N_Offs-DL in RRC Connection Reconfiguration. Jul 12, 2018 · The study is performed for different cell diameters and BS antenna heights at a carrier frequency of 2. Feb 5, 2024 · There are two parameters in LTE Pa and Pb which define the power of the Reference Signals against the other symbols e. PDSCH Symbols. Cell DL Average Throughput: This parameter evaluates downlink data rate in kbps. Feb 1, 2017 · In order to determine physical layer performance, we need to calculate the total physical resources available for different bandwidths of downlink transmission. 4. LTE handover measurements can be done using either RSRP or RSRQ. The corresponding MCS cell range, SINR, DL throughput, and RSRP were observed at different MCS levels. The purpose of this document is to guide mobile operators through network deployment and optimisation based on service experience. Downlink (DL): 1. Let’s explore DL and UL in detail. We cover the below mentioned topics 1. In the DL Control Channel Parameters dialog's Basic tab, you can set the Power Boost parameter for P-SS Primary Synchronization Signal, S-SS Secondary Synchronization Signal, PBCH Physical Broadcast Channel, PCFICH Physical Control Format Indicator Channel, C-RS Cell-specific RS PDCCH Physical Downlink Control Channel, and PHICH Physical Hybrid Jul 12, 2021 · RSRP / LTE carrier RSSI (in Watts) or RSRQ = 10 log (N) + RSRP – LTE carrier RSSI (in dB) Where N is the number of resource block over the measured bandwidth (see table below) As it happened with RSRP this quantity is also used by the UE to rank cells for cell reselection and handover. Det Aug 17, 2020 · LTE(Long Term Evolution) is a high data rate, low latency and packet optimized radio access technologydesigned to support roaming Internet access via cell phones and handheld devices in 3G and 4G Feb 3, 2022 · In this paper, a 4G LTE network driven by SDR hardware and software-radio-system-LTE (srsLTE) that is an open-source LTE software platform is evaluated in terms of the throughput and latency. Modified on Sat, 16 May, 2020 at 9:23 AM Apr 6, 2022 · This parameter can take values from 0 to 15. We first give an summary of parameters, then explain each parameter in three categories (basic cell information, idle-state handoff, and active-state handoff ) in details. a typical value of 10-2 in LTE. Designed for simplified / low cost device ==> Same goal as LTE counterpart Narrower bandwidth comparing to regular NR use case (eMBB), but narrowband here means up to 20 Mhz in sub-7 Ghz and 100 Mbps in mmWave ==> Even though it is called narrow band, it is already same as the max bandwidth of single carrier LTE . 3. Here the list of carried information from […] Jul 6, 2013 · 3GPP Long Term Evolution-Advanced (LTE-A) aims at enhancement of LTE performance in many respects including the system capacity and network coverage. UEs will use these reference signals to measure the quality of the DL channel and Sep 14, 2019 · Moreover, LTE attach request, Average LTE UEs (User Equipment's) connected and number of PDN (Packet Data Network) sessions are other important parameters, which will be considered in this paper. Oct 19, 2021 · RSRP levels for usable signal typically range from about -75 dBm close in to an LTE cell site to -120 dBm at the edge of LTE coverage. In case of 4G DL, rather than varying power in the Downlink, full power is distributed uniformly over the whole bandwidth. Reports should be run for a significant number of days so that data is statistically valid. Uplink power adjustment scheme 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 have been increased. e. The same Power Spectral Density (PSD) is used on all DL channels. 4MHz to 20MHz. More careful management of mobility and handover (HO) might be required in Sep 1, 2020 · CEUs also have very low DL throughput during peak hours in the three bands (from 0. LTE DRIVE TEST PARAMETERS RSRP :- Reference signal receive power. 5. There are two types of EPS bearers: default and dedicated. MCS and Modulation Order . Long-Term Evolution (LTE) systems can be implemented in TDD mode (TD-LTE). g, QPSK, 16 QAM, 64 QAM, 256 QAM). 2. For the coverage-limited scenario LTE link budget is compared to that of 3GPP Release 8 HSPA+ with 2x2 MIMO. Cell UL Average Throughput: This parameter evaluates uplink data rate in kbps. 4 km area in the city centre of Bristol, UK. Direction: DL, or downlink, refers to the transmission of data from the eNodeB (base station) to the user equipment (UE). Key parameters of the LTE passive radars are presented in Section 4. . Jun 1, 2022 · The 4G LTE Modem used for field data collection could record sixty-seven (67) parameters of the 4G LTE network. 25 GHz Overview (Back to top). Utilizing the DL-Throughput is essential for network dimensioning. Carrier Aggregation (Advanced LTE-A TDD DL) The figure below shows a Basic LTE-A signal carrier with two component carriers. The software sets the values in the Physical Layer Cell ID Group and Physical Layer Cell ID Sector cells based on the Cell ID entry. Abstract—LTE’s uplink (UL) efficiency critically depends on how the interference across different cells is controlled. The higher the value, the better (the higher the speed the LTE operator's base station can allocate). 5QI = 9 Nokia Siemens Networks LTE Radio Parameters / v001 / Document Number For internal use. For unpaired spectrum (TDD), paired DL and UL BWPs switch together. The LTE air interface offers several channel bandwidths ranging from 1. QCI; ARP; GBR; MBR; APN-AMBR; UE-AMBR 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 Mar 1, 2023 · The selected LTE parameters, which are highly correlated with UL throughput (RSRP, RSRQ, and SNR), are trained in five different learning algorithms for estimating UL data rates. 7 gives concluding remarks. LTE FDD 2×2 MIMO DL MX882012C-011/LTE TDD 2×2 MIMO DL MX882013C-011 IP Data Transfer Test (2×2 MIMO) Simultaneous installation of the MX882012C-006 LTE FDD IP Data Dec 30, 2018 · ong Term Evolution or LTE is a 3GPP-defined mobile communication technology also known as 4G. 125 GHz) • Bands numbered from 1 to 255 • No longer can be commonly referred to as sub-6 GHz! • FR2 (24. . Sixteen out of the 32 parameters logged were selected for analysis in this data article. On the other hand, we need to determine how many physical resources are associated with overhead. In this case, the signal quality is actually very poor. The unique characteristics of LTE’s modulation and UL resource assignment poses considerable challenges in achieving this goal because most LTE deployments have 1:1 frequency re-use, and Apr 14, 2020 · From the drive test results obtained 80. Jul 16, 2013 · In this paper, the parameters of the LTE system in DL are investigated. See full list on techtrained. 1. Furthermore, with rising demand and complexity, traditional network management Aug 12, 2024 · RSSI – Represents the entire received power including the wanted power from the serving cell as well as all cochannel power and other sources of noise and it is related to the above parameters through the following formula: RSRQ=N*(RSRP/RSSI) Where N is the number of Resource Blocks of the E-UTRA carrier RSSI measurement bandwidth. Cell ID. UE Category for PHY layer throughput . So, it is very likely that you would see low CQI when you see throughput drop in livenetwork test. 77% of 546 samples on RSRP parameters ≥ -100 dBm and 32. The low SINR parameter of the drive test results May 29, 2015 · 1. Besides, three different scenarios are implemented in order to evaluate the 4G LTE network by traffic injection through Iperf3 application and calculating Oct 9, 2015 · Step 1: Identify cell with low DL (downlink) throughput The first thing is to identify those cells with low throughput. INTRODUCTION Long Term Evolution (LTE) is the evolution of the Third-Generation (3G) of mobile communications that create a new radio-access technology which provide high data rates, low Aug 19, 2023 · In paired spectrum (FDD), DL and UL BWPs can be switched separately. SIB3 is transmitted from the network to UE through BCCH -> DL-SCH -> PDSCH channels. Dec 29, 2022 · Speaking of low quality area, you might want to look up to pZeroNominalPusch and pZeroNominalPucch parameters as having them too high will higher signal power that might increase interference at cell edge. 85. Knowledge of absolute RSRP provides the UE with essential information about the strength of cells from which path loss can be calculated and used in the algorithms for determining the optimum power settings for Dec 29, 2022 · Speaking of low quality area, you might want to look up to pZeroNominalPusch and pZeroNominalPucch parameters as having them too high will higher signal power that might increase interference at cell edge. APN-AMBR for uplink = 1792000000 bits. Feb 20, 2020 · In this video, we explain the KPIs and performance criteria used to determine coverage issues in UL and DL in LTE. This threshold is defined by your network policies and practices (it also depends on your design parameters). 1 Reselection priorities handling for details). UE Category is the set of information (parameters) that defines the maximum throughput for a UE. 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. 4. 2. As LTE evolves, the length of UE category list gets longer and longer, and the interpretation of the category gets more complicated, you will need to go through many tables listed below to figure out the exact throughput capability of a UE. 6. g. View Jun 15, 2019 · In this post, I’ll be going over the common and typical handover parameters used in inter-RAT (radio access technology) handovers (LTE to LTE). Mapped EPS QoS parameters: QCI = 9. In the LTE network, the EPS bearer QoS is controlled using the following LTE QoS parameters: Resource Type: GBR or Non-GBR QoS Parameters. Enter a value for the Cell ID. Download Free PDF View PDF. Different BS transmit powers are assumed for each of the cell diameters with parameters taken from . The remainder of the paper is organized as follows. Thes e parameters inc lude the effect of the Hybrid Adaptive Repeat and Request hencefor th May 9, 2021 · What is CSI-RS? Channel State Information Reference Signal (CSI-RS) is a reference signal (RS) that is used in the Downlink (DL) direction in 5G NR, for the purpose of Channel Sounding and used to measure the characteristics of a radio channel so that it can use correct modulation, code rate, beam forming etc. lte subcon. H. We carry out a thorough review of 3GPP specifications analyzing the requirements of the 3GPP QoS architecture. The measured data were then compared with the 3GPP theoretical values in Sect. 8 • 2 frequency ranges: • FR1 (410 MHz –7. This release is the second stage of the LTE-Advanced realization. ) I did not mentioned poor efficiency in UL as I consider that the efficiency is the result of other factors. Aug 30, 2023 · The “Non-Stand Alone” (NSA) architecture, where the 5G Radio Access Network (AN) and its New Radio (NR) interface is used in conjunction with the existing LTE and EPC infrastructure Core Network (respectively 4G Radio and 4G Core), thus making the NR technology available without network replacement. This rising demand for network utilization has demonstrated the need for more service improvement. This page gives a detailed description of handoff-related parameters in LTE. The actual LTE (4G) is based on 3GPP Release 11. • RSRP (dBm) = RSSI (dBm) -10*log (12*N) where RSSI = Received Signal Strength Indicator N: number of RBs across the RSSI is measured and depends on the BW Significance : RSRP is the most basic of the UE physical layer measurements and is the linear average power (in watts) of the downlink reference signals (RS) across the Modulation scheme DL: QPSK, 16QAM, 64QAM & 256QAM UL: QPSK, 16QAM, 64QAM (optional) Max DL Speed Max UL Speed Latency round trip Time 3GPP Releases COMPARISON OF LTE WITH OTHER CELLULAR TECHNOLOGIES WCDMA HSPA HSPA+ LTE (UMTS) HSDPA/HSUPA 384 kbps 14 Mbps 28 Mbps 100 Mbps 128 kbps 5. Interference Jan 2, 2024 · Throughput may vary based on the QoS parameters assigned to different services. FIGURE 2 FREQUENCY DOMAIN REPRESENTATION OF DOWNLINK AND UPLINK LTE ACCESS TECHNOLOGIES. 600 GHz) →Soon to be extended to 114. (The reason is same as above) iii) With low CQI, it is for sure that you cannot achieve the maximum throughput. downlinkFrequency, downlinkBandwidth, uplinkFrequency, uplinkBandwidth corresponds to the System Information Block Type 3 or with shortened version SIB3 contains common information for Intra-Frequency, Inter-Frequency and Inter-Technology cell re-selection parameters. In my personal experience, is very difficult to link throughput with efficiency (both UL and DL). View Jan 1, 2013 · The Matlab-based LTE system-level simulator is an easy and effective way to study HARQ performance. 6 GHz in a 4 km × 4. 78% of 546 samples on SINR parameters ≥ 3 dB. 7 Mbps 11 Mbps 50 Mbps 150 ms 100 ms 50 ms 10 ms Rel 99/4 Rel ii) Low throughput does not necessarily mean low CQI. , period of DL PI) and the indication granularity is selected as either the whole bandwidth or half bandwidth in the frequency domain; for UL CI, both the indicated resource range and the indication granularity can be configured flexibly. Example 1 > Throughput, CQI, BLER while driving on a highway Mar 25, 2021 · For instance, at RSRP of -115, the UE might be getting along fine with NB 12. Cell DL Maximum Throughput: This parameter is calculated based on the maximal bitrate in downlink, measured every second. Jan 1, 2022 · However, for DL PI, the indicated resource range is fixed (i. But these parameter values are not applied in all re-selection scenarios. Both coverage-limited and interference-limited scenarios are considered. Following shows the number of PDSCH RBs for scheduled slot. So, it is important to understand the proportion of codecs in your network and then plan the SRVCC threshold accordingly. Range: 0 to 503. RSSI in LTE - Received Signal Strength Indication (signal power) (dBm) (2G, 3G and LTE) RSSI for LTE is a calculated from several other signal related measurements. Mohammed et al. Apr 1, 2020 · The parameters measured and tested comprise of the key performance indicators such as the Reference Signal Received Power (RSRP), Signal-to-Interference-plus-Noise Ratio (SINR), Received Signal Strength Indicator (RSSI), Reference Signal Received Quality (RSRQ), Packet Data Convergence Protocol Downlink Throughput (PDCP DL Throughput), and the May 5, 2022 · The 4G LTE Modem used for field data collection could record sixty-seven (67) parameters of the 4G LTE network. However, the measured DL-Throughput vary from the real throughput because of fluctuation due to the mobility of the mobile device. But we have to check a couple of other parameters (like number of RBs for each slot and SLIV) for further clarification. Advanced LTE Features: Carrier Aggregation: Carrier aggregation allows the aggregation of multiple LTE carriers, leading to increased overall bandwidth. The following table shows the different values of these parameters, which correspond to very bad, bad, good and very good LTE signal quality: Apr 24, 2020 · RSSI values in 3G - Received Signal Strength Indication (signal power) (dBm) (2G, 3G and LTE) The RSSI standard values for 3G are basically the same as for 2G. In the second cluster, max numbers of UEs are recorded at 7 PM as in Table 5 . Accurately computing all the overhead REs is necessary to achieve an efficient system design, which is difficult because LTE is a complex standard that contains a large number of implementation May 16, 2020 · How To Interpret SINR parameters in 2G, 3G and LTE routers. Intended Audience Public In This Task - Summary of issue - Solution This site is for everything on 4G/LTE. LTE bearers Jan 1, 2013 · The Matlab-based LTE system-level simulator is an easy and effective way to study HARQ performance. Some of these studies address the performance of 4G/LTE networks and analyze some of the parameters, which affect directly the per-formance of these networks. SINR = -1. 1 Mbps). These were affected by traffic load balance and the use of system resources under the correct radio conditions. You may know that MCS (Modulation Coding Scheme) is related to Modulation Order (Modulation Depth, e. In large macro cells, the high transmit power of base stations (BSs Jun 11, 2016 · Therefore the picture below should explain you on Which channels in DL and UL , power control takes place. Interference Mar 23, 2022 · A machine learning model for the analysis of the LTE/ LTE-A mobile network was proposed by N. Remember that RSSI is only measured at those symbol times during which RS REs are transmitted – We do not have to take into the count DTx!!! So, when there is no traffic, and assuming only the reference symbols are transmitted (there are 2 of them within the same symbol of a resource block) from a single Tx antenna then the RSSI is generated by only the 2 reference symbols so the result becomes LTE SIB6 specifies the WCDMA frequencies (DL ARFCN) and the parameters used for absolute priority based cell reselection. LTE, Cellular Network, optimization technique, drive test. For example, a 4G LTE modem might report an RSSI of -68 dBm, but: RSRP = -56 dBm. Data Flow: Aug 4, 2023 · Below are explanations of the LTE signal strength values (and also RSSI in relation to LTE): SINR/SNR – The signal-to-noise ratio of the given signal. Authorized QoS flow descriptions: QoS flow description 1: QFI = 1. Table 1 summarises the system parameters used in our studies. A very low SRVCC threshold might increase VoLTE drops and reduce VoLTE quality. There are two main Mar 10, 2016 · This paper proposes the design of a scheduling framework for the downlink of the Long Term Evolution (LTE) system with the objective of meeting the Quality of Service (QoS) requirements as defined by the QoS architecture of the 3G Partnership Project (3GPP) specifications. Apr 24, 2020 · Scope This article applies for all 2G, 3G and LTE devices. 2 Literature Review Recently, we are witnessing growing interest in research focusing on KPI performance analysis in 4G/LTE networks. This white paper addresses the wireless network optimization challenges from a radio network perspective. Lowering both too much can also lead to the opposite. For a quick refresher on how the UE does these measurements check out my previous post on LTE Power Measurements. com Mar 3, 2024 · This means that if the UE is unable to decode PDCCH then the UE cannot read the PDSCH in that subframe and consistent decoding failures of PDCCH lead to RLF (Radio Link Failure) due to N310. This modulation order is defined as a Parameter called Qm in 3GPP and the relationship between MCS value and Qm is defined in a little bit differently for PDSCH and PUSCH in the three tables This requires a low-complexity block equalizer at the eNodeB receiver to correct for the distorting effects of the radio channel. LTE-Advanced Pro Features: Feb 4, 2020 · indicators such as the LTE reference signal received power (RSRP), signal to interference plus noise ratio (SINR), and traffic load. < LTE-U Band Definition > Following band/frquency mapping table is based on LTE-U Technical Report Coexistence Study for LTE-U SDL V1. 7. If you need to create LTE-U test (i. However, the dynamic change of a TDD configuration has not been well supported and investigated. MCC （ Mobile country code ）,MNC （ Mobile Network Code ）,TAC(Tracking Area Code) ,Cell Identity are all related to cell identity information, use these information can identify a single cellular base station. 8 dB. In this part, we will first introduce the structure of the simulator and the principles of CC-HARQ and IR-HARQ, and then we show the data structure we designed to implement HARQ and its advantages. Operation code = 1 (create new QoS flow description) E = 1 (parameters list is included) Number of parameters = 2. The carrier aggregate (maximum 1) together with the component carriers (maximum 5) count as 1 carrier of the 16 carrier maximum. 9 to 0. This enhancement can be accomplished by heterogeneous networks (HetNets) where additional micro-nodes that require lower transmission power are efficiently deployed. Number of EPS parameters = 2. SC-FDMA is not as sensitive to frequency instability and Doppler Effect as OFDM because of its single carrier nature. Types of Active BWPs: Initial DL/UL BWP: Used for initial access before Radio Resource Control (RRC) connection establishment. Aug 24, 2016 · Dynamic time-division duplexing (TDD) enables adjustments of uplink (UL) and downlink (DL) resources flexibly according to the instantaneous traffic load. Nov 5, 2018 · 5G at mid and high bands is well suited for deployment at existing site grids, especially when combined with low-band LTE. On the other hand, min DL throughput in L1800 is between 0. We will look a little bit further into LTE QoS that we discussed last time, and learn what QoS parameters are for. LTE signal structure and overview details are given in Section 3. Sep 20, 2020 · It considers the necessary parameters for the 4G/LTE-A network, such as DL traffic volume, average throughput distributed for a specific cell, average throughput for users, maximum and average number of UEs in a particular cell, and network utilization. 250 - 52. dcbchjmpkqysvwgzyzucykctosputqohxrgokuhoqutn