The slot is of 0. The period of one LTE radio frame structure is 10ms. Each LTE frame has a duration of 10 ms, and is subdivided into 10 equal-size subframes of 1 ms; each subframe comprises two slot periods of 0. 8MHZ. 211 V16. Define LTE Frame Structure? How many Sub-frame present in single Frame-Structure? What is Cyclic Prefix? How many OFDM symbols are available in 1 Time. NR Frame structure in muted MBS subframe based DSS. 𝜇Each subframe consists of 2 slots of 14 OFDM symbols each. structure Basic unit of resource is the Physical Resource Block (PRB). LTE Frame Structure. Dynamic part is called as SIB and is mapped on RRC SI messages (SI-1,2,3,4,5,6,7,8,9,10,11) over DL-SCH and transmitted using PDSCH at periodic intervals. Slideshow 2210075 by allieIn LTE physical layer, the LTE frame structure is of two types: 1. 211) defines the Frame Structure. The frame-structured metal mesh conductive film can resist considerable. LTE Introduction. Each LTE frame has 10 sub-frames (1. Depending on the cyclic prefix (CP) duration, each slot carries a number of orthog-LTE TDD Frame Structure ? FDD|| TDD क्या है I अगर प्रोटोकॉल टेस्टिंग की है तैयारी तो जरूर देखो. Downlink ※ Reference - 3GPP TS 36. LTE frame structure. In FDD, half of the subframes are reserved for uplink and half for downlink in both full-duplex and half-duplex. 25-20 MHz). 19/06/2016 0. Moreover, if Carrier Aggregation is done with a couple of such carriers, it will provide a huge throughput gain. ms each) while each sub-frame is further divided into 2 slots (0. FDD (Frequency division duplex), which uses type 1 frame structure. In the case of TDD operation (frame structure type 2, middle part of Figure 5. So LTE need to keep the rule set by 802. Total 17 frames are used for carrying information data and 1 frame (i. LTE FRAME STRUCTURE AND SIGNAL MODEL A. FDD and TDD mode can be combined (depends on UE capabilities) in the same physical layer. lets take few example to understand frame structure in more details . For the FDD mode of operation, there are two carrier frequencies, one for uplink transmission (f UL) and one for downlink transmission (f DL). The HI all,Please go through video of LTE Frame Structure (FDD and TDD). LTE frame structure 50 Resource Blocks 7 Symbols RB = 12 Sub-carriers x 7 Symbols 12 Subcarriers 0 49 (normal)Current radio frame structures in Long-Term Evolution (LTE) and New Radio (NR) have some restrictions. Radio frames and subframes are of fixed lengths. LTE frames are 10 msec in duration. In this example we will be simulating what happens when a mobile phone is turned on. When data is. 4) is applied to Time Division Duplex (TDD) mode maintaining only full duplex operation. They are chosen to be the same as in LTE, thereby allowing for better LTE-NR co-existence. The LTE half-frames are further split into five subframes, each 1ms long. Tables defining Uplink Frame Structure . LTE frame structures used for TDD 36. The NR frame structure supports TDD and FDD transmissions and operation in both the licensed and the unlicensed spectrum. 300 Figure 4: Overall Architecture eNB = E-UTRAN Node B All radio interface-related functions MME = Mobile Management entity – Manages mobility, UE identity, and security parameters. , Frame Structure Type 3) was introduced to facilitate unlicensed spectrum operation consisting of 10 subframes of length 1 ms as illustrated in Fig. Here D- is downlink, S- for Special subframe and U- for Uplink. How about SSB? We can. It does not show any structure in frequency domain. It improves on those standards' capacity and speed by using a different radio interface and core network improvements. Raad Farhood Chisab. Prasad. 2. In this example we will be simulating what happens when a mobile phone is turned on. Alternative PDSCH DM-RS pattern when LTE CRS rate matching is configured; 7. Hybrid ARQ Transmission Short Frame Sizes of 10ms and 1ms faster feedback and better efficiency at high speed. 0 (2019-02): a. LTE Frame Structure Types. One slot is defined as 14 OFDM symbols, which corresponds to once a frame or one millisecond in LTE. 0 (2019-02): a. The purpose of different frame structures: flexible, multiple uses. NR frame structure supports TDD and FDD transmissions and operation in both licensed and unlicensed spectrum. 3 Frame and slot structure 174 8. The LTE frame structure for the FDD and TDD schemes was discussed in Chapter 9. 5 ms Sub frame duration=1 ms Basic time unit Ts for BW of 20MHz, (1/15000)*2048 seconds equal to 32. LTE defines a generic frame structure that applies to both DL and UL for FDD operation. 5 ms. 6 Uplink hopping 182 8. In TDD there are about 7 frame configurations, based on different DL/UL. Although choosing a 5G NR compatible frame format may. 03255 us) in 36. 25 MHz to 20 MHz. Frame Structure Understanding the 5G NR Physical Layer Waveform, Numerology and Frame Structure 21 – Frame: 10 ms – Subframe: Reference period of 1 ms – Slot (slot based scheduling) • 14 OFDM symbols • One possible scheduling unit - Slot aggregation allowed • Slot length scales with the subcarrier spacing The air interface described in the chapter covers the concepts of LTE frame structure, downlink and uplink scheduling, and detailed illustrations of the data flow across the protocol layers. · Each Radio frame consists two half frames. Resource Allocation Note: This is the 2nd lecture in a series of lectures on 1G to 5G. 1. In the time domain the LTE transmissions are organized into frames of 10 msec length. In the time domain, one LTE frame has a 10 ms period and consists of 20 slots of 0. This is the first message from UE to eNB when you power it on. Each LTE frame has 10 sub-frames (1 ms each) while each sub-frame is further. Overview Network architecture Protocol stack Resource element Frame structure TDD frame configuration TDD special subframe MIMO Random access procedure. One Frame consists of 10 subframes. 2. This Sync detection is done every 5 ms. The LTE specifications define both FDD and TDD modes of operation. Although a slot is a typical unit for transmission upon which scheduling operates, NR enables transmission toThere are two types of frame structure in the LTE standard, Type 1 and Type 2. 5 ms. This LTE tutorial covers LTE basics, LTE features, LTE air interface, LTE channels and LTE frame structure. Performance Results. This Video Explains the LTE technology basics, OFDMA and LTE Frame Structures and types. 4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz. Page 2 - 2 - INHA UNIVERSITY. (normal cyclic prefix) or six (extended cyclic prefix). Now (as of Sep 2017) 3GPP official specification (38. Learn the basics behind 5G NR waveforms, frame structure, and numerology. As shown in the diagram, This radio frame is made up of two half frames, each lasting 5ms, for a total frame duration of around 10ms. The components of the LTE network. The evolved packet core communicates with packet data networks in the outside world such as the internet, private corporate networks or. A typical LTE frame is 10 ms (milliseconds) long. The length of one frame is 10 ms, which comprises 10 subframes. The LTE uses 2 CP sizes – Normal. from publication: Robust Doubly-Differential Primary Synchronization Approach for 3GPP LTE Systems. The number of symbols per slot depends on the size of the cyclic. 11 devices. 3GPP LTE Frame Structure 1, Applicable to TDD and FDD Note (1) Note to Figure 1: (1) For more information, refer to 3GPP Technical Specification 36. LTE Frame Structure. Frame-Structure in LTE. But in NR, the number of slots varies according to the numerology. 5 mm width of the frame structure has a similar in sertion loss to the Nanomaterials 2023 , 13 , 221 3 of 11 copper-based microstrip line; therefore , the frame structure. There are two types of LTE frame structure: Type 1: used for the LTE FDD mode systems. It only shows the structure of one frame in time domain. 5 ms. Figure 4. Instead, we can define the pattern in much more flexible way using several parameters as shown below. LTE devices remain unaffected (i. 5 Downlink distributed transmission 178 8. LTE Frame Structure Made Simple. The highest level view from 36. 2The LTE-Frequency Division Duplex (FDD) mode was employed in this study, as used by the majority of operators in the world [18]. iv) Transmit every 40 ms , repeat every 10 ms . Mapped to 72 active sub carriers(6 resource blocks), centered around the DC subcarrier in slot 0 (Subframe 0) and slot 10 (Subframe 5) in FDD. 2. A typical LTE frame is 10 ms (milliseconds) long. The figure here illustrates the decomposition of the packet from PHY up to the IP layer. Learn the basics behind 5G NR waveforms, frame structure, and numerology. Number of Subframes in a Radio Frame = 10. • A radio frame has duration of 10 ms. link 2 link 3 lte part of the…The LTE TDD frame structure is Type 2. . End-to-end simulation and conformance testing. A TDD frame structure is shown in below figure. . 12. The figure depicts LTE-M frame structure similar to LTE technology. 11. Historically, CPRI is mainly designed for 2G/3G and eCPRI is designed for LTE and NR, but it is all up to network infra structure vendors which type of CPRI (CPRI or eCPRI) to use for which radio access technology (i. Each radio frame will have a total of ten subframes, each with two time slots. Each subframe consists of two slots. Define Frame Structure? Q02. In a nutshell, the basic air-interface design of LTE can be described as a single carrier with fixed bandwidth (with a small set of candidate values) of a single numerology and rigid frame structure, with fixed always-on CRS for all transmission schemes, and inflexible control region and initial access channels. 5 ms. Read more >> Femtocell tutorial- This tutorial covers femtocell basics including network architecture. The SSS has 168 cell ID groups that are generated from cyclic shifts of sequences and . It compares both with respect to application,frame structure, Guard period,frequency band,interference,data rate and. There are two types of LTE frame structure: 1. LTE RACH in Details . The Frame Controller controls the subframe and frame indices. Channel Mapping. 1 Protocol structure over S1 13 6. Figure 1 shows frame structure type 1, which can be used in either full-duplex or half-duplex FDD mode. LTE standard supports multiple bandwidth (BW) configurations, from 1. There are total 10 subframes in a frame. The word number (W) in a base frame is same but the byte. What is Sampling rate in LTE? What is the Sampling rate of Normal CP and Extended CP? Q06. However, unlike LTE-U, LAA use a special physical layer frame structure called Frame Structure Type 3 which didn't exisit before. Embodiments of the flexible frame structure include different parameters that are flexible, i. LTE Parameters and Downlink Modulation. 12 6. • A resource block (RB) spans 12 subcarriers over a slot duration of 0. · Sub-frame size= 1 ms. Like LTE-U, this is a kind of technology to transmit LTE signal in unlicensed frequency range. The skeleton is on example of a frame structure. Uplink and downlink configurations are used to create subframes (0 to 6). LTE frame structure. Each subframe has a length of 1 ms, which comprises 30,720 complex time-domain baseband samples sampled at a rate of 30. 3 Downlink frame structure 190 9. The frame structure below ( Figure 1) is applicable to TDD. Modulation: OFDM with QPSK, 16 QAM, 64 QAM 10. 1-1: Mapping between cell-identity group and the indices m0 and. 0 MHz, 5. How to deal with SSB ? In case of NR PDSCH transmission in DSS mode, most of the problems (especially problems of collision with LTE frame structure) were resolved by tweaking NR side (like punctuation/rate matching of NR data). There are six time units: frame, half-frame, subframe, slot. As shown in Fig. Frame Structure • Two radio frame structures defined. OVERVIEW The design of the LTE physical layer (PHY) is heavily influenced by the requirements for high peak transmission rate (100 Mbps DL/50 Mbps UL), spectral efficiency, and multiple channel bandwidths (1. 75 KHz Subcarrier Spacing. The duplex method and frame structure selected for the NR deployment will influence the integrity KPI performance values that can be achieved in the network. However, in addition to the other modulation schemes used in 4G, radio conditions allowing, it can use 256-state quadrature amplitude modulation (256QAM). The design considera-tions are explained below. Following equation is based on 36. Uplink Frame Structure of LTE-NB can be summarized in the following three tables. In addition, each subframe is further subdivided into two equal time slots, ie each slot is 0. 1. As I mentioned in previous section, three different sequences are used as the primary sync signal and there is a one-to-one mapping between each of. 1 primary and 4 secondary). LTE system basic parameters and LTE Frame structure: Frame Size=10ms No. 19. Figure 1: TD-LTE Frame Structures Each one millisecond downlink subframe contains blocks of data (“resource. This video looks at OFDM waveforms, and the different subcarrier spacings supported in 5G NR. 5 ms each). Figure 1 LTE Frame structure . In case of co-site deployment, slot- and frame structures may be aligned to simplify cell search and inter. Figure 10: Frame structure in LTE. PMP frame to this LTE frame, the downlink start has to align to the beginning of subframe 4, not subframe 0. This paper proposes a dual-band transparent antenna using frame-structured metal mesh conductive film (MMCF). Primary Synchronization Signal (P-SS) Sequences. (ii) Type 2: supports TDD mode. It enables very low latency, fast HARQ acknowledgements, dynamic TDD, coexistence with LTE and transmissions of variable length (for example, short duration for URLLC and long duration for eMBB). 6, the downlink subframe structure in LTE consists of an LTE control region and an LTE data region. To fulfill these requirements, orthogonal frequency division multiplex (OFDM) was selected as the basis for the PHY layer. Now consider the details of a symbol. This provides several benefits, including:Frame Structure : Uplink; Frequency and Band Table : EUTRA Band and Channel Bandwidth; Frequency and Band Table : EUTRA Band and Frequency Range;. The air interface described in the chapter covers the concepts of LTE frame structure, downlink and uplink scheduling, and detailed illustrations of the data flow across the. 4 Bearer management over S1 14 6. 211). One element that is shared by the LTE Downlink and Uplink is the generic frame structure. If you are interested in some historical aspects of the 5G Frame structure, it would be good to read through this. The LTE frame structure for the FDD and TDD schemes was discussed in Chapter 9. Uplink3. One subcarrier has bandwidth of 15 kHz. Based on the review of latest 3GPP documents, this paper describes. We also have a separate sec. 2 Initiation over S1 14 6. The air interface described in this book covers the concepts of LTE frame structure, downlink and uplink scheduling, and detailed illustrations of the data flow across the protocol layers. Now (as of Sep 2017) 3GPP official specification (38. Signal analysis. 5: Gable Frame Steel Structure. OFDMA Downlink. 8MHZ. Selection of SubCarrier Spacing (SCS) d. 11 in order not to prevent the communiction between existing 802. LTE Frame structure. The frame structure for the type 2 frames used on LTE TDD is somewhat different. The frame time for. Following equation is based on 36. 0%Abstract: In this chapter, we introduce the OFDM‐based LTE signal and frame structure to explain how the user‐plane and control‐plane data from the higher layers, such as the. As of now, around 16 carriers can be aggregation in. D = downlink sub-frame; U = uplink sub-frame; S = special sub-frame. But anyway good thing to me was that the most important factors in uplink slot is same as the one in the downlink. The introduction of the LTE next-generation communication standard makes MIMO evaluation in a fading environment much more complex. The PSS signal is the same for any given. Some of high level description you can get from this figure would be . 10 mili second radio frame consists of Downlink subframe, Uplink subframe and Special subframe. Just take a look at the overall uplink slot structure. Type 1 radio frame has a duration 10 ms and consists of equally sized 20 slots each of 0. Ok now on to our Downlink LTE frame structure. 3 16. Selection of a special slot configuration Downlink and uplink transmissions are organized into radio frames with 10 ms duration. FDD downlink frame structure detailed; TDD frame structure; LTE (any OFDM/OFDMA) band is made up of multiple small spaced channels and we call each of these small channels as “Sub Carrier”. The air interface described in the chapter covers the concepts of LTE frame structure, downlink and uplink scheduling, and detailed illustrations of the data flow across the protocol layers. 8. A standard LTE system architecture consists of an Evolved UMTS Terrestrial Radio Access Network, more commonly known as E-UTRAN, and the System Architecture Evolution, also known as SAE. (Please refer to diagram for better understanding) 1) In time domain, 1 Radio frame (RF) is of 10 ms. What is VSWR. Figure 1. Working on two industry-level projects will give you hands-on practice in customising LTE-Sim(an open. LTE: Key Features 2. Download scientific diagram | LTE frame structure. Sub frame duration=1 ms. 211 for FDD LTE is as follows. Frame Structure 2. LTE FDD uses 10ms frames, divided into 20 sub-frames or slots (of 0. 25KHZ, whereas UL Subcarrier=15KHz. Normally, it uses UpPTS sub-frame. There are two types of frames in LTE;FDD and TDD. One GSM hyperframe composed of 2048 superframes. It enables very low latency, fast HARQ acknowledgments, dynamic TDD, coexistence with LTE and transmissions of variable length (for example, short duration for URLLC and long duration for enhanced MBB (eMBB)). Every slot contains either six. Most of technical materials (or white papers) write several pages in words based on these. This video looks at OFDM waveforms, and the different subcarrier spacings supported in 5G NR. The useful symbol time is Tu = 2048 ⋅ Ts ≈ 66. Further each radio frame is divided into two sub frames each of 5ms. The LTE half-frames are further split into. No. Uplink 3. Each. OFDMA System Model LTE (Long Term Evolution) uses OFDMA and SC-FDMA at downstream and upstream for downlink and uplink transmission. Base stations need to. m1” (see appendix 2). 2 Frame Structure and Physical Resources 11 4. A resourceThis site is for everything on 4G/LTE. The number of slots per subframe depends on subcarrier spacing. A standard LTE system architecture consists of an Evolved UMTS Terrestrial Radio Access Network, more commonly known as E-UTRAN, and the System Architecture Evolution, also known as SAE. The LTE architecture consists of LTE EUTRAN and LTE Evolved Packet Core (EPC). A subframe comprises two slots, thus one radio frame has 10 sub‐frames. The selection of bandwidth depends on factors like network capacity and available spectrum. Space between the chhanel and the next channel is always same regardless of the system bandwidth of the LTE band. Each radio frame of length Tf = 307200*Ts = 10 ms consists of two half-frames of length Tf = 153600*Ts = 5 ms each. 5 msec. 72 MS/s, which is valid for the 20 MHz LTE bandwidth mode. Frame structure of the LTE resource grid. 5 ms each. It describes both TDD band and FDD b. SI-1 transmitted every 80ms, SI-2 every 160ms and SI-3 every 320 ms. Alternative frame structures are defined for use with TDD. 16d standard Zigbee RF4CE Frame Structure Zigbee physical layer Frame Structure Zigbee MAC. Figure 1: LTE Generic Frame Structure [3] 2. We show that this fixed TTI duration is extremely inefficient whenLTE FRAME STRUCTURE Bikas Singh 5y 5G NR Terminologies – Subcarrier Spacing, Fram-Subframe, Slot and Symbol K. The IP packet is enveloped in the 4G-LTE layers: 4G-LTE Packet Structure. e. The air interface described in this book covers the concepts of LTE frame structure, downlink and uplink scheduling, and detailed illustrations of the data flow across the protocol layers. Myung 17 Frame Structure • Two radio frame structures defined. 2. A new LTE frame type (i. Multiple. LTE-M Frame Structure. Moreover, each subframe is further divided into two equally sized time slots, that is, each slot is 0. I would just put down a high level descriptions of the difference here. In LTE, the subframe number and OFDM symbol number within the subframe is always same in any cases). Type 1: Used in LTE FDD. For the examples of TDD resource grids for each Subframe DL/UL Configuration and Special Subframe Configuration, see Frame Structure Frame Type 2 Overview section. It describes the details of the optimization process including performance measurements and troubleshooting mechanisms in addition to demonstrating common. The cyclic shifts are generated based on cell-identity group number, which. The LTE standard uses Orthogonal Frequency Division Multiplexing (OFDM) modulation to achieve robust transmission in multipath scenarios (Liu et al. If you can interpret these tables into a correct graphical format, you already understand all the details of Uplink frame structure. cyclic prefix). There are two types of LTE frame structure: 1. Each radio frame of length Tf = 307200*Ts = 10 ms consists of two half-frames of length Tf = 153600*Ts = 5 ms each. As illustrated below, there can be two major types suggested. 5. Wadia Institute of Himalayan Geology. Modulation: OFDM with QPSK, 16 QAM, 64 QAM 10. One resource block is 0. . The Evolved Packet Core (EPC). Alternative PDSCH DM-RS pattern when LTE CRS rate matching is configured; 7. The uplink and downlink bands are separated in the frequency domain using a guard band. WiMAX physical layer Frame Structure as per 802. The minimum unit being frame (or TDMA frame) is made of 8 time slots. LTE FDD. A new LTE frame type (i. Gabled Frames. 2. LTE defines a basic unit of time: In the time domain, both uplink and downlink are organized. The basic type 1 LTE frame has an overall length of 10 ms. The LTE specifications define both FDD and TDD modes of operation. 10. 3 Mode of Operation : 1. In this video we discuss three focus areas; Downlink Frame Structure, Uplink Frame Structure, and TDD Options. • LTE Rel. OFDMA downlink, Single Carrier Frequency Division Multiple Access (SC-FDMA) uplink 11. The components of the LTE network. A frame has 10 subframes having 1ms duration each. There has been long long discussions on frame structure both in academia and in 3GPP and now we have pretty clear agreements on what a NR(5G) radio frame would look like. ) Precoding Fading Power Control PUCCH. 101 version 10. This is the same as in LTE, facilitating NR and LTE coexistence. The frame-structured metal mesh conductive film is based on the conductive-coated thin film and forms a narrow strip surrounding the edge of the antenna. The chapter concludes with an end‐to‐end procedure of when the UE powers‐up in an LTE network, interchanging data with the network and mobiles around. 5G NR Supports two frequency ranges FR1 (Sub 6GHz) and FR2 (millimeter wave range, 24. What is an LTE frame structure? In LTE, DL and UL transmissions are organized in radio frames of 10 ms each. It describes the details of the optimization process including performance measurements and troubleshooting mechanisms in addition to demonstrating common. Bandwidth vs RBs • LTE physical layer supports any bandwidthTime Domain transmission pattern of SS Block in NR is more complicated than LTE SS Block (Actually LTE has only one pattern of SSB Transmission in Time Domain as shown in LTE Frame Structure. LTE FRAME STRUCTURE. Type 1 is used as LTE FDD frame structure. There are two types of frame structures in LTE; type 1 used for FDD and type 2 for TDD, as shown in the diagrams above. For FDD, whether downlink and uplink In this chapter, we introduce the OFDM‐based LTE signal and frame structure to explain how the user‐plane and control‐plane data from the higher layers, such as the Radio Link Control (RLC) layer and Media Access Control (MAC) layer are multiplexed with physical layer control and Reference Signals (RSs) for data transmission. Therefore, fitting the flexible physical layer design of NR around that of LTE is needed in order to deploy DSS on a shared spectrum. LTE Frame Structure Made Simple. In LTE, only 2 slots are available. The biggest difference of any new wireless communication technology starts from physical layer frame structure. LTE DL Frame Structure in a Nutshell. 1. 10 subframes (= 20 slots) are fit into 10 ms in LTE while various number of slots depending on Numerology are fit into 10 ms in 5G NR. In TDD, one single frequency will be used at. LTE Frame Structure Figure 1 describes the LTE frame structure for TDD mode [4]. A subframe is defined as two consecutive slots. 3) is used for Frequency Division Duplex (FDD) mode;. Special Slot Usage LTE Frame Structure Type2 . k) that the frame structures given in Annex 1, Frame A and Frame B can be implemented for NR(New Radio) systems; l) that the Frame B2 given in Annex 1 is compatible with the LTE-TDD frame structure configuration n o. The air interface described in this book covers the concepts of LTE frame structure, downlink and uplink scheduling, and detailed illustrations of the data flow across the protocol layers. Selection of a timing reference (beginning of the frame) b. 2. 3GPP LTE. 2. Download scientific diagram | LTE Frame Structure for FDD Systems. Learn the details of LTE-NB frame structure for downlink operation mode, including the subframe mapping, the reference signal, the NPBCH, NPSS and NSSS. A transport block is a group of resource blocks with a common modulation/coding. Hence there are total 20 slots in a radio frame. 211 for FDD LTE is as follows. The frame structure below ( Figure 1) is applicable to TDD. frame, called resource elements (REs). Keywords: 3GPP, LTE, LTE-A, LTE system toolbox, Physical frame structure I. It’s been a key technology behind expansion of Internet of Things (IoT) devices, and has helped prove. 2. LTE uses OFDMA for the downlink, with a fairly simple frame structure, and SC-FDMA for the uplink. Time Domain Correlation. Type 1: Used in LTE FDD. • LTE interoperates with CDMA2000, W-CDMA and GSM systems. LTE RF/PHY RF Measurement. Type 1 radio frame has a duration 10 ms and consists of equally sized 20 slots each of 0. A frame has a duration of 10 ms and consists of 10 subframes. The LTE standard uses Orthogonal Frequency Division Multiplexing (OFDM) modulation to achieve robust transmission in multipath scenarios (Liu et al. Figure 1 : Downlink Physical Channel Structure. Each subframe composed of 2 time slots. 5 ms each). Slot Structure. The downlink and uplink frame structure parameters are the same, except that the time-domain underlying symbols in the downlink are OFDM symbols, whereas in the uplink the underlying symbols are SC-FDMA symbols due to the use of different multiple access methods in. As described above, in 5G/NR multiple numerologies (waveform configuration like subframe spacing) are supported and the radio frame structure gets a little bit different depending on the type of the numerology. LTE system basic parameters and LTE Frame structure: Frame Size=10ms. e, 2G/3G, LTE, NR). 8 supports scalable RF channel bandwidths from 1.