Low dl lte parameters. RSRP and RSRQ Measurement in LTE. (The reason is same as above) iii) With low CQI, it is for sure that you cannot achieve the maximum throughput. There are two main Jul 5, 2024 · RSSI for LTE is a calculated from several other signal related measurements: RSSI = wideband power = noise + serving cell power + interference power. LTE handover measurements can be done using either RSRP or RSRQ. On the other hand, we need to determine how many ph Jan 2, 2024 · Throughput may vary based on the QoS parameters assigned to different services. I will just explain with an example. 1 (v860) 36. Oct 22, 2017 · 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. RSRP – The average power received from a single Reference signal, and Its typical range is around -44dbm (good) to -140dbm(bad). 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 Number of EPS parameters = 2. < LTE-U Band Definition > Following band/frquency mapping table is based on LTE-U Technical Report Coexistence Study for LTE-U SDL V1. 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. g. There are two types of EPS bearers: default and dedicated. 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. 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 Feb 1, 2017 · Physical layer data throughput can be calculated accurately for different scenarios. 101, ci-dessous Duplexage FDD, TDD, FDD semi-duplex Codage des canaux Code turbo Mobilité 350 km / h Bande passante du canal (MHz) 1. Enter a value for the Cell ID. This paper reviews basics of radio planning for 3GPP LTE. Radio Frequency (RF) driving test was used to collect the parameters of LTE data at a different route with an average total of 10Km. This requires a low-complexity block equalizer at the eNodeB receiver to correct for the distorting effects of the radio channel. For the coverage-limited scenario LTE link budget is compared to that of 3GPP Release 8 HSPA+ with 2x2 MIMO. Cell DL Maximum Throughput: This parameter is calculated based on the maximal bitrate in downlink, measured every second. 125 GHz) • Bands numbered from 1 to 255 • No longer can be commonly referred to as sub-6 GHz! • FR2 (24. MCS and Modulation Order . 101(v860) Table 5. Example 1 > Throughput, CQI, BLER while driving on a highway Sep 14, 2019 · Cell DL Average Throughput: This parameter evaluates downlink data rate in kbps. 1 Mbps). 4. 5QI = 9 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 Sep 1, 2020 · CEUs also have very low DL throughput during peak hours in the three bands (from 0. Both coverage-limited and interference-limited scenarios are considered. 8 dB. Aug 24, 2016 · Dynamic time-division duplexing (TDD) enables adjustments of uplink (UL) and downlink (DL) resources flexibly according to the instantaneous traffic load. This threshold is defined by your network policies and practices In order to get the best performance out of an LTE network, it needs to be optimized continuously. Advanced LTE Features: Carrier Aggregation: Carrier aggregation allows the aggregation of multiple LTE carriers, leading to increased overall bandwidth. 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. 1. lte subcon. 3. Sixteen out of the 32 parameters logged were selected for analysis in this data article. 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. 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). 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 Jan 11, 2024 · Resources demand (very high and low demand) Low power headroom; Other (VSWR, backhaul capacity, etc. Det This page gives a detailed description of handoff-related parameters in LTE. g, QPSK, 16 QAM, 64 QAM, 256 QAM). Download Free PDF View PDF. 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. RSRP and RSRQ are key measures of signal level and quality for modern LTE networks. 9 to 0. 7 gives concluding remarks. For example, a 4G LTE modem might report an RSSI of -68 dBm, but: RSRP = -56 dBm. How Cell Reselection Priority is determined ? There are roughly three different ways of informing UE of Reselection Priority as listed before : (refer to 36. In addition to these parameters, LTE-Advanced was intended to match or exceed the standards set by the ITU for IMT-Advanced with regards to capacity, data rates and low-cost deployment. It enhances throughput by enabling the simultaneous use of multiple frequency bands. 6. Interference Jun 1, 2022 · The 4G LTE Modem used for field data collection could record sixty-seven (67) parameters of the 4G LTE network. 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. APN-AMBR for uplink = 1792000000 bits. You may know that MCS (Modulation Coding Scheme) is related to Modulation Order (Modulation Depth, e. This site is for everything on 4G/LTE. The higher the value, the better (the higher the speed the LTE operator's base station can allocate). The following table shows the different values of these parameters, which correspond to very bad, bad, good and very good LTE signal quality: parameters in TK and Sect. Authorized QoS flow descriptions: QoS flow description 1: QFI = 1. Parameters Description; Frequency range: UMTS FDD bands and TDD bands defined in 36. 1 Reselection priorities handling for details). Cell UL Average Throughput: This parameter evaluates uplink data rate in kbps. 7 Mbps 11 Mbps 50 Mbps 150 ms 100 ms 50 ms 10 ms Rel 99/4 Rel To meet these new MTC requirements, 3GPP Release 13 introduced the two cellular technologies: LTE Cat M1 and LTE Cat NB1, also known as LTE-M and Narrowband IoT (NB-IoT), respectively. Collection of DL Throughput data was carried out in the urban environment of Najaf province, Iraq, from three mobile network operators. Feb 20, 2020 · In this video, we explain the KPIs and performance criteria used to determine coverage issues in UL and DL in LTE. 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 Apr 6, 2022 · This parameter can take values from 0 to 15. 5. Jan 2, 2024 · 3. 4 3 5 10 15 20 Configuration de la bande passante May 7, 2010 · Spectrum compatibility was required for a straightforward, low-cost progression to LTE-Advanced networks, similar to the evolution of WCDMA to HSPA. 304 5. 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. Transmission Parameters: The eNodeB controls DL transmission parameters, such as modulation and coding schemes, to optimize the data transmission based on the channel conditions. Default: 1. 1, given below: Duplexing: FDD, TDD, half-duplex FDD Oct 15, 2013 · We will look a little bit further into LTE QoS that we discussed last time, and learn what QoS parameters are for. Resource Allocation: HO and/or reselection parameters must be within the range allowed by OAM. DL: 300MbpsUEcategory5, 4x4MIMO, 20MHzbandwidth MIMO MultipleInputMultipleOutput UL: 1 x 2, 1 x 4 DL: 2 x 2, 4 x 2, 4 x 4 Coverage 5 - 100km with slight degradation after 30km QoS E2E QOS allowing prioritization of different class of service Latency End-user latency < 10mS E-UTRA Operating Bands Following is the table for E-UTRA operating bands taken from LTE Sepecification 36. 1 Intra-LTE Handover Intra-LTE handover within the current LTE network is achieved typically by utilizing the X2 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. PDSCH Symbols. 25 GHz 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 Feb 4, 2020 · indicators such as the LTE reference signal received power (RSRP), signal to interference plus noise ratio (SINR), and traffic load. Nokia Siemens Networks LTE Radio Parameters / v001 / Document Number For internal use. 2. However, the dynamic change of a TDD configuration has not been well supported and investigated. However, thirty-two (32) parameters were logged during the field data collection. 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. 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. This white paper addresses the wireless network optimization challenges from a radio network perspective. If there is any other competing cells around, you have to consider a lot of other factors like absolute measured cell power, priority and various cell search/reselection criteria as well. Cell ID. . 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. QCI; ARP; GBR; MBR; APN-AMBR; UE-AMBR 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. In the LTE network, the EPS bearer QoS is controlled using the following LTE QoS parameters: Resource Type: GBR or Non-GBR QoS Parameters. In order to determine physical layer performance, we need to calculate the total physical resources available for different bandwidths of downlink transmission. In this case, the signal quality is actually very poor. RSRQ = -16 dB. 2 Literature Review Recently, we are witnessing growing interest in research focusing on KPI performance analysis in 4G/LTE networks. APN-AMBR: APN-AMBR for downlink = 4864000000 bits. If you need to create LTE-U test (i. SINR = -1. See full list on techtrained. In the second cluster, max numbers of UEs are recorded at 7 PM as in Table 5 . Jan 18, 2024 · DL typically uses a frequency band that is different from the frequency band used for uplink communication. Range: 0 to 503. a) The first thing is to identify those cells with low throughput. 3. In my personal experience, is very difficult to link throughput with efficiency (both UL and DL). Cette section résume les paramètres de base du LTE: Paramètres La description Gamme de fréquences Bandes UMTS FDD et bandes TDD définies dans le tableau 5. Lowering both too much can also lead to the opposite. 3 (LTE Forum Documents). Mapped EPS QoS parameters: QCI = 9. On the other hand, min DL throughput in L1800 is between 0. Aug 18, 2017 · 2. Hence, the decoding of PDCCH is extremely important and that is why it uses a special structure which is different than other channels. LTE-Advanced Pro Features: 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. e, Carrier Aggragation) you woud need to use the channel number startimg from the number in column N_Offs-DL in RRC Connection Reconfiguration. We cover the below mentioned topics 1. SC-FDMA is not as sensitive to frequency instability and Doppler Effect as OFDM because of its single carrier nature. LTE SIB6 specifies the WCDMA frequencies (DL ARFCN) and the parameters used for absolute priority based cell reselection. Operation code = 1 (create new QoS flow description) E = 1 (parameters list is included) Number of parameters = 2. Besides, three different scenarios are implemented in order to evaluate the 4G LTE network by traffic injection through Iperf3 application and calculating 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 Handover in LTE-Advanced Handovers are the essential element of load balancing schemes in LTE; thus we will discuss the HO in LTE networks. The 3GPP (3rd Generation Partnership Project) is the body responsible for developing cellular technologies, and their standards are structured as Releases . 8 • 2 frequency ranges: • FR1 (410 MHz –7. So, it is very likely that you would see low CQI when you see throughput drop in livenetwork test. In large macro cells, the high transmit power of base stations (BSs 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. For a quick refresher on how the UE does these measurements check out my previous post on LTE Power Measurements. 1 Data collection. Long-Term Evolution (LTE) systems can be implemented in TDD mode (TD-LTE). The purpose of this document is to guide mobile operators through network deployment and optimisation based on service experience. FIGURE 2 FREQUENCY DOMAIN REPRESENTATION OF DOWNLINK AND UPLINK LTE ACCESS TECHNOLOGIES. ) I did not mentioned poor efficiency in UL as I consider that the efficiency is the result of other factors. In cellular networks, when a mobile moves from cell to cell and performs cell selection/reselection and handover, it has to measure the signal strength/quality of the neighbor cells. 600 GHz) →Soon to be extended to 114. 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. ii) Low throughput does not necessarily mean low CQI. < Example 2 > Assumption : It is assumed that there is only one Cell is available and cell selection is determined only by S_rxlev and S_qual. 5 and 1 Mbps at (1 AM, 5 PM) for the number of UEs in a range of 41–93% from total recorded UEs. 250 - 52. com Feb 5, 2017 · Step 1: Identify cell with low DL (downlink) throughput. 101v860 Table 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. dkrwvhfrxfjeqycvgfymyahakltymaioaccizkcrbsoialpuu