The figure depicts carrier aggregation used in LTE TDD mode frame. In TDD, where frame structure 2 is used, N TA,offset =624. the amount of signaling overhead. Figure 3 shows the frame structure for LTE in FDD mode (Frame Structure Type 1). Here. PCFICH and PDCCH. FDD and TDD LTE networks have been deployed on all continents. For the normal mode, the first symbol has a cyclic prefix of length TCP = 160 ⋅ Ts ≈ 5. Type 1 LTE Frame Structure. (Credit: 3GPP TS 38. Determining a frame structure of the first RAT comprising a subframe rate, and switching periodicity, at least in part to a corresponding. You’ll also learn about the impact of different subcarrier spacings on slots and subframes. It consists of a 10 ms radio frame divided into 20 slots, numbered 0 to 19, each with a duration of 0. This section only discusses how to. Type 2: TDD : Time Division Duplex. The duplexing options supported in NR include frequency division duplex (FDD), TDD with semi-statically configured UL/DL configuration, and dynamic TDD. A 5G frame structure designed for efficient support of users with highly diverse service requirements is proposed. The frame can be dynamically configured to any one of the preset configurations shown, depending on the instantaneous data transmission requirement. efficiency and coverage because of the frame structure, and the nature of the spectrum unutilized for TDD being deployed in high bands. TDD In TDD mode occupy the same frequency spectrum but are separated in time for uplink and downlink transmissions . Frame Structure Type 2: TDD. e. The remaining six symbols have a cyclic prefix of length TCP = 144 ⋅ Ts ≈ 4. Frame Structure Type 1. 72 (=0. cyclic prefix). Type 1: FDD Frame. Reference E-UTRA TDD UE (LCR TDD frame structure. , OFDMA frame structure, PUSC permutation scheme in downlink and uplink subframes, ranging, and channel coding with tail-biting. 5 ms. Whereas further optimizations can be made for Frequency Division Duplexing (FDD) systems, the combination of sTTI and Time Division Duplexing (TDD) has limits. 1 and 10. 7 μs. The numerology in 5G is used to define these parameters, and includes the su LTE TDD frame 36. As a result of the differences in the radio frame structure between LTE TDD and LTE FDD, the resource elements are also configured differently. Type 1 Frame = A Type 1 Frame is used in the FDD mode. 9A EP18185302A EP3416330A1 EP 3416330 A1 EP3416330 A1 EP 3416330A1 EP 18185302 A EP18185302 A EP 18185302A EP 3416330 A1 EP3416330 A1 EP 3416330A1 AuthorityIn another embodiment, the first radio frame and the second radio frame are two different frames belonging to the same downlink / uplink configuration period. Each subframe consists of two slots. Increasing frame configuration; Configuration: 3GPP release: Downlink to uplink switch point periodicity (ms) Subframe number: Number of subframes / frame: 0: 1: 2: 3: 4: 5: 6: 7: 8: 9: D [DL] U [UL] S. This example shows how to create a frame containing the cell-specific reference signals (CellRS) in each subframe. TDD frame structure; Part 4: SC-FDMA and LTE Uplink. Time Division Duplex Wireless is a fundamental technology for 5G deployments around the world. 12 – Example of VBW setting for LTE-FDDand LTE-TDD to avoid underestimation. g. 2–1) Symbol level TDDResource Block of RACH in LTE Frame Structure : Preamble length is 6RB , 1 RB=180KHZ, so 6RB=1. Second, we present a detailed characterization of the Star-link downlink signal structure in the 10. Less. duplex operation with the time frequency structures. 00In the TDD frame structure of a wireless communication system such as LTE, a single frequency block is shared in the time domain between UL and DL transmission. LTE Frame Structure. In LTE TDD, if a subframe (equivalent to a Slot in NR) is configured for DL or UL, all of the symbols within the subframe should be. 211. The target of TDD. There are two types of LTE frame structure: Type 1: used for the LTE FDD mode systems. As shown in Figure 1, the total length of downlink pilot time slot (DwPTS), GP, and uplink pilot time slot (UpPTS) fields is equal to 1 ms duration. PMP frame to this LTE frame, the downlink start has to align to the beginning of subframe 4, not subframe 0. Switching Points. Two types of frames are defined for LTE: Type 1, which is used in FDD and is the dominant mode of operation as shown in Fig. Choose. tdd UL/DL Common Configuration (tdd-UL-DL-configurationCommon) in Detail . In addition, the ME7873L can be tailored to the required test environment, matching customers' RF TRX, performance, and RRM requirements, as well as. Each frame is then divided into ten subframes of 1-millisecond duration. This is shown in figure after uplink subframe(of frame: N) and before next downlink subframe (i. LTE/LTE-Advanced FDD/TDD frame structures [3]. KR20160137999A - Method and apparatus for determining a flexible subframe type in a lte-tdd system -. 4. 3) is used for Frequency Division Duplex (FDD) mode; however, the type 2 structure (Fig. 9, 1. Further enhancements followed in Rel. Many different bands: 700/1500/1700/ 2100 /2600 MHz . In 5G/NR, we don't have any predefined pattern. 5. What is claimed is: 1. 7 GHz band. The target figures for data throughput in the downlink is 1 Gbps for 4G LTE Advanced. The actual LTE (4G) is based on 3GPP Release 11. A TDD frame structure is shown in below figure. < PRACH Preamble Format >. The invention discloses a method (500) for a cellular communications system (100), in which traffic is sent in frames (200), each frame comprising a first number of subframes (201-210), with a second number of said subframes being available for at least either uplink or downlink traffic. In TDD, the transmission is divided into time domain, means at one moment of time either downlink. NOTE: There are much more information you need to know about the numerology in addition to this table. Essentially, when operating a 5G or 4G LTE network in a TDD environment, we not only need frequency and phase synchronization, but also frame and slot synchronization. The HI all,Please go through video of LTE Frame Structure (FDD and TDD). One such specific consideration is for TDD operation where the existing TDD frame structure in LTE up to Release 14 was based on downlink subframes, uplink subframes and special subframes. 00 - View presentation slides online. In this paper, we study the frame structure design for low latency communications in 5G TDD. A radio frame consists of 10 subframes. In Fig. 1- Providing UE with Cell-Specific Slot format Configuration (tdd-UL-DL-ConfigurationCommon) 2- Providing UE with dedicated Slot format configuration (tdd-UL-DL-ConfigurationDedicated) 1- : RRC : tdd-UL-DL-ConfigurationCommon. One sub frame is composed of 7 normal time slots used for downlink/uplink and 3 special time slots. Fig. Two consecutive time slots will form one subframe. The concept would be similar to legacy LTE TDD Subframe configuration, but main differences from LTE TDD subframe configuration are. 370/210: 20080144530: Method, device, system and software product for alternative time division duplex frame structure optimization: 2008-06-19: Che et al. Note the similarities to the LTE standard for the 20 MHz transmission mode . 1), where the downlink and uplink transmissions are per-formed in different carrier frequencies. MHz spectrum, we have to use this 20 MHz bandwidth for both DL and UL. e. DL Control Channel. The Fading parameters are available for Advanced LTE and Advanced LTE-A TDD. e. Like LTE-U, this is a kind of technology to transmit LTE signal in unlicensed frequency range. However, employing TDD will lead to a long transmission latency due to the uplink/downlink transmission constraints. There are two types of frame structure in the LTE standard, Type 1 and Type 2. 7 μs. LTE Protocol Stack. Time Division Duplex Wireless is a fundamental technology for 5G deployments around the world. In order to achieve these goals, further enhancements to LTE and LTE-Aare considered in addition to development of the new radio technology for 5G NR networks. 5 ms. Frame structure with Numerologies. I think this kind of subframe structure would clear up a lot of confusion. 가장 큰 차이점은 프레임 구조와 HARQ이다. Type 1: FDD : Frequency Division Duplex. These parameters are defined in 38. · Each Radio frame consists two half frames. 5 ms. Number of. Refer LTE stack >>. 3GPP Release 8, 2009. 1. Slot Structure. In this tutorial, TDD frame structure below will be used, which is a DDDSU slot pattern with 2. Frame structure type 1 is applicable to both full duplex and half duplex FDD. in Figure 1. Overview-TDD: Frame Structure Type 2 < TDD LTE Frame Structure > Followings are examples for various TDD UL/DL configurations. There are two types of LTE frame structures. In this video we discuss three focus areas; Downlink Frame Structure, Uplink Frame Structure, and TDD Options. One such specific consideration is for TDD operation where the existing TDD frame structure in LTE up to Release 14 was based on downlink subframes, uplink subframes and special subframes. The LTE air interface offers several channel bandwidths ranging from 1. Frame structure type 2(for 5ms switch-point periodicity) Figure 22. As an. But in NR, the number of slots varies according to the numerology. The scheduling based on the SIB (System Information Blocks) transmission. LTE network offers about. In LTE, DL and UL transmissions are organized into radio frames of 10 ms each. Frame structure in LTE-TDD systems. The frame structure in this case is tailored to the LTE Physical. In the special slot, symbols allocated for downlink, gap and uplink are 10:2:2 respectively. 5ms each). An operator can choose a specific TDD configuration depending on the service requirements; Frame always starts with a Downlink subframe, used for advertising the frame descriptor information i. Frame structures of these two working mode are presented in Fig. The TDD frame structure can be configured in seven different sub frame formats; however sub frames 0 and 5 and DwTS are reserved for downlink transmission. We propose a frame structure design. 2 μs. LTE physical layer tutorials. The radio frame is represented in the LTE Toolbox™ product by the use of a succession of 10 cell-wide settings structures with the NSubframe field set from 0 through 9 in each. Based on GP in the special sub-frame of TDD LTE-A system, a novel positing scheme is proposed in this paper by adding navigation signal. 2. 1 LTE Physical Layer. – Frame structure type 1 (FS1): FDD. LTE is designed primarily for full duplex operation in paired spectrum. In LTE, a subframe is used as a minimum scheduling unit in time-domain while in NR, a slot is used as a dynamic scheduling unit. Differences between LTE-FDD and LTE-TDD. LTE also support both TDD and FDD, but unlike the single frame structure used in NR, LTE uses two different frame structures. Fig. OFDMA and Downlink Frame Structure Details. InFrame 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 spacingLet us understand LTE FDD and TDD LTE versions with figures and band example below. , 3:1 DL/UL ratio with 5 ms DL/UL switching period. In each subframe, there are two switching. LTE Introduction. The invention provides a method for transmitting downlink reference signals in a time division duplex (TDD) system. A subframe comprises two slots, thus one radio frame has 10 sub‐frames. from publication: Robust Doubly-Differential Primary Synchronization Approach for 3GPP LTE Systems. Additional information on other system parameters is also listed in Table 2. The purpose of different frame structures: flexible, multiple uses. Basic Layer 1 Details of TDD. Each radio frame of length Tf = 307200*Ts = 10 ms consists of two half-frames of length Tf = 153600*Ts = 5 ms each. approved DD Month YYYY. 4 LTE mobile device availability summary 4. Introducing sTTI in LTE has conflicting design aspects with regards to the frame structure. Type 1: FDD Frame Structure. Depending on configuration, they can concatenate multiple DL subframe and add only one UL control in the last subframe. I got all of the following examples using Sandesh Dhagle's Resource Grid. One way to avoid cross-link interference is to ensure that all base stations are either transmitting simultaneously or receiving simultaneously. In LTE, we don't need any specific terminology to indicate the subcarrier spacing since there is only one subcarrier spacing, but in NR there are several different types of subcarrier spacing . OEO116120 LTE eRAN3. given in Annex 1 is compatible with the LTE-TDD frame structure configuration no. 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. The frame structure for the type 2 frames used on LTE TDD is somewhat different. Finally, each subframe is split into two timeslots, each with a duration of 0. Technical Overview of 3GPP LTE| Hyung G. They are chosen to be the same as in LTE, thereby allowing for better LTE-NR co-existence. 211). May 6, 2021 On-Demand Demo See a Celona 5G LAN in action and learn the basics Get Access This episode of Field Journal we’ll go deep into the TDD-LTE frame structure in the CBRS spectrum band, and touch on the different 4G LTE deployment methods that are used in different environments. It improves on those standards' capacity and speed by using a different radio interface and core network improvements. 2 DSUDDDSUDD (10ms duration), where different special subframe “S” configurations are possible such 1EP2479919A1 EP12160504A EP12160504A EP2479919A1 EP 2479919 A1 EP2479919 A1 EP 2479919A1 EP 12160504 A EP12160504 A EP 12160504A EP 12160504 A EP12160504 A EP. To contrast, WiMAX operates in half duplex in unpaired spectrum, where information is transmitted in one direction at a time. · It consists in a category of Frame 2. 1. This section describes the design and implementation of an OFDMA-TDD PHY compliant with the mobileWiMAX standard. It consists of a 10 ms radio frame divided into 20 slots, numbered 0 to 19, each with a duration of 0. 1), where the downlink and uplink transmissions are per-formed in different carrier frequencies. e. 8A CN201580008676A CN105993137A CN 105993137 A CN105993137 A CN 105993137A CN 201580008676 A CN201580008676 A CN 201580008676A CN 105993137 A CN105993137 A CN 105993137A Authority CN China Prior art keywords frame flexible sub index sub radio frames Prior art date 2014-02-13. 2 LTE Frame Structure The frame structure is dependent on the duplex scheme applied in the spectrum. Increasing frame configuration; Configuration: 3GPP release: Downlink to uplink switch point. This release is the second stage of the LTE-Advanced realization. In addition, LTE air interface supports both frequency division duplexing (FDD) and time division duplexing (TDD). But anyway good thing to me was that the most important factors in uplink slot is same as the one in the downlink. In TDD mode, the SF is either of type DL, UL or special (Spc). Compared with IMT-Advanced (e. Type 2: used for the LTE TDD systems. • A resource block (RB) spans 12 subcarriers over a slot duration of 0. For FDD, whether downlink and uplinkThe Third Generation Partnership Project (3GPP) has been studying dynamic allocation of sub-frames to uplink or downlink in Time Division Duplex (TDD), since the Long Term Evolution (LTE) Rel. Fig. One TDD frame is composed of T = 10subframes, and the time length of each subframe is 1millisecond [2]. I claim: 1. Type 2: used for the LTE TDD systems. 5), there is a single carrier frequency and uplink and downlink transmissions are separated in the time domain on a cell basis. and slot 12 (Subframe 6) in TDD. 370/254: 20080137562: Methods And Apparatus For Communication With Time-Division Duplexing: 2008-06-12:Then FDD/TDD Duplexing Scheme with reference to the frame structure will be shown. 7 μs. This site is for everything on 4G/LTE. The frame structures for LTE differ between the Time Division Duplex, TDD and the Frequency Division Duplex, FDD modes as there are different requirements on segregating the transmitted data. e. LTE standard has been published by 3GPP as an extension of UMTS (based on 3GPP standard) and 1xEV-DO (base on 3GPP2 standard) technologies. 위의 그림이 FDD에 활용되는 Type1의 Frame 구조다. As shown in the figure below, an LTE TDD frame is made of total 20 slots, each of 0. This avoids inter-network interference. LTE-TDD and NR-TDD CBSDs, GAA channelization and SAS-CBSD protocol extensions. 9 Physical signals Physical signals are used in LTE to allow cell synchronization and channel estimation. 211 frame structure type 2 (DL / UL / SSF) Correct choice of Configuration value is essential when setting the UL/DL ratio for CableFree LTE networks using TDD bands. Frame Structure Type 1. in NR slot. 2. Expected in the 2008 time frame, LTE is a 3GPP standard that provides for an uplink speed of up to 50 megabits per second (Mbps) and a downlink speed of up to 100 Mbps. 3 TDD LTE Growth in the market 3. Time division duplex (TDD) plays an important role in 5G systems because it employs an unpaired spectrum and offers channel reciprocity. Type 2: used for the LTE TDD systems. 8. synchronise with Existing TD LTE networks. Download scientific diagram | LTE-TDD frame structure from publication: A Study on Channel Estimation Algorithm with Sounding Reference Signal for TDD Downlink Scheduling | Coping with the limited. , RRM, admission and connection control, and. As known, LTE traffic is divided into two parts: an uplink and a downlink transmission. Long Term Evolution (LTE). Type 1: FDD : Frequency Division Duplex. However the system structure of LTE TDD is different from of that in LTE FDD. DL Control Channel. The radio frame of 10 ms are transmitted continuously as per TDD topology one after the other. Physical Resource Block and Resource Element A Physical. In the N7625C Signal Studio software, click a different channel to view that channel's parameter choices. know, one sample (Ts) is 1/30. Each subframe composed of 2 time slots. same time at different frequencies. Consecutive two-time slots make a sub-frame and constitute one TTI (transmit time interval) of 1 millisecond. Very Basic understanding of Frame , subframe , slots and OFDM symbols1. Can Schedule 1 DL and 1 UL subframe at a time. 1 Reasonable illuminator. Conformance Test Setup. There are two types of LTE frame structure: 1. Frame-Structure in LTE. There is also basic information about how and why synchronisation can and should be achieved. The frame consists of two "half-frames" of equal . In terms of DL/UL pattern frame B (DDDSUUDDDD) is equivalent to the frame DDDDDDDSUU with -2ms/+3ms time offset, which in turn is compatible with LTE frame structure configuration no. 2 TDD Configurations The goal of the CBRS Alliance is to allow flexible use of CBRS band if coexistence of multiple deployments is preserved. Type 1 lasts 10 ms equivalent to 10 subframes. 2009-1-27 2 Outline • LTE requirement. In 4G LTE networks, both FDD and TDD, the transmissions are sent in radio frames of 10 milliseconds. 811 subscribers. These parameters are defined in 38. The ECC Recommendation (15)01 [3], as amended on 14 February 2020, addresses, among other bands, the cross-border coordination of TDD MFCN in. 5 ms 1 radio frame = 10 subframes = 20 slots. In LTE TDD, we defined 7 predefined pattern for UL and DL allocation in a radio frame. LTE Frame Structure Figure 1 describes the LTE frame structure for TDD mode [4]. Application. frame structure optimization indicated higher. 11 and Rel. Learn the basics behind 5G NR waveforms, frame structure, and numerology. e. The support for both TDD, half and full-duplex FDD is handled by two very similar frame structures: frame structure type 1 for half and full-duplex FDD and frame structure type 2 for TDD. CMCC,CATT, etc. Length of one slot is fixed. 4/3/5/10/15/20 MHz. As shown in Fig. 5 milliseconds. OFDM with a cyclic prefix is the basic modulation scheme selected to combat severe frequency-selective multipath fading. In. 1 provides an illustration of an LTE FDD and TDD frame structure as an example of an air interface with FDD and TDD modes. Double-click or use the drop-down menu to set the subframe allocation for MBSFN within the radio frame allocation period defined by the two parameters: Radio Frame Allocation Period and Radio Frame Allocation Offset. Each. 10 ms radio frame, 1 ms sub frame. URLLC within a carrier should be supported , and TDD with flexible UL / DL ratio is desirable . TS0 is always assigned as the downlink direction an conveys control messages such as the broadcast channel (BCH) while TS1 is always allocated as uplink. 2. UE hence learns the frame structure in the subframe. 2. This gap allows Base Station (BS) to switch from receive mode to transmit mode. Frame Structure and Crossed Slots LTE-TDD frame consists of 10 sub-frames of 1 ms each. 4. In other embodiments, the first and second radio frames are two different ones that fall within the same downlink/uplink configuration period. Apart from some smaller differences in the frame structure and mapping of some physical signals, the overall physical layer processing (e. Uplink users transmit subframes, random-access requests (PRACH) and SRS during the UpPTS section of the special subframe. Figure 8: LTE-TDD frame structure Each subframe has a 1ms length, and can be used in the 3 following modes: "D" (downlink), "U" (uplink) and "S" (switching point). OFDM symbol duration reduces with increased SCS -> since the number of. e. In FDD, where frame structure 1 is used, N TA,offset =0. TDD have a special sub frame (1,6) when downlink-to. 0 LTE TDD Subframe Configuration Feature ISSUE 1. 6 symbols. 5 GHz. At least one of said second number of subframes is made to comprise at least three parts, as follows:. Determine frame synchronization and cell identification (cell search procedure) based. Hi All,There are lot of new member joined so i am providing the links of ORAN videos whi. Type 2 LTE Frame Structure. While FDD makes use of separate bands to transmit uplink and downlink data, TDD uses time slots on the same frequency for both uplink and downlink. 7 μs. In the TDD duplexing mode, a single bandwidth is shared between uplink and downlink, with the sharing being performed by. • The equipment requires to be switched between transmission and reception. It includes support for mobile broadband data, mission-critical communication, and massive machine communication. Frame Structure Type 2: TDD. when μ = 0. The special sub frame is used to provide the necessary guard time for downlink-uplink switching shown in Table 1. LTE offers a flexible range of channel bandwidth (1. There are three types of Frame Structure : Type 1 for FDD, Type 2 for TDD, Type 3 for LAA. This page is moved soon to Guard Period in TDD Bands makes them highly inefficient if used in lower frequency configurationThe LTE TDD frame structure is Type 2. The useful symbol time is Tu = 2048 ⋅ Ts ≈ 66. 3 GHz TDD technology in [15] and. As a basic scheduling unit, each slot can be configured by the base station via physical layer signaling. 1, TDD frames of different cells are aligned in the time domain. For multiple access, LTE uses: For down link: OFDMA: Orthogonal Frequency Division Multiple Access. Fig. This paper presents the LTE duplexing modes: LTE-TDD (Time Division Duplexing) and LTE-FDD (Frequency. 0 as follows : TDD-UL-DL-ConfigCommon ::= SEQUENCE04/02/2023 10 Types of Frame Structure in LTE: • Types of Frame structure in LTE: 3GPP defines two types of frames based on the duplexing scheme used. See full list on rfmw. A diagram of the radio frame structure is shown in Figure 9, which includes information at the frame level down to the OFDM symbol level. . CMCC, CATT, etc. OEO116120 LTE eRAN3. TD-LTE has a 10 ms TDD frame structure. Learn the basics behind 5G NR waveforms, frame structure, and numerology. The TDD guard period must be long enough for the farthest NB of which the signal still could be seen. Each subframe has two slots. Increasing frame configuration; Configuration: 3GPP release: Downlink to uplink switch point. Using the latency model shown in Figure 11. 9 – Frame structure LTE-TDD type 2 (for 5€ms switch-point periodicity) Figure€E. Download scientific diagram | LTE-TDD frame structure from publication: A Study on Channel Estimation Algorithm with Sounding Reference Signal for TDD Downlink Scheduling | Coping with the limited. There are two topologies used in LTE system viz. Even under dynamic TDD configuration , the TDD configuration can only change every 10 ms ( one radio frame ) . These are Type 1 when FDD is used and Type 2 when TDD is used. The LTE half-frames are further. For the normal mode, the first symbol has a cyclic prefix of length TCP = 160 ⋅ Ts ≈ 5. It improves on those standards' capacity and speed by using a different radio interface and core network improvements. A radio frame consists of 10 subframes. Figure 3 shows the frame structure for LTE in FDD mode (Frame Structure Type 1). (for FDD and TDD) and DCI Formats 2B/2C for TDD alone. Hierarchy of Frame Structure : Frame (Radio Frame) --> SubFrame --> Slot (Same as in 5G/NR) Number of slots within 1 subframe : 2 only, but the concept of slot is not used often in LTE. Figure 6. In the TDD duplexing mode, a single bandwidth is shared between uplink and downlink, with the sharing being performed by. A TDD includes a special subframe that has two pilot timeslots such as uplink and downlink that are separated from a GP (Guard. NR frame structure supports TDD and FDD transmissions and operation in both licensed and unlicensed spectrum. Signal Studio for LTE/LTE-Advanced FDD currently supports only FDD and frame structure type 1. In. Coexistence between CBSDsThe NR frame structure supports TDD and FDD transmissions and operation in both the licensed and the unlicensed spectrum. That has been defined by 3GPP with the name TDD Frame. A phone must typically perform the following tasks (Figure 5): Acquire a signal on a given LTE carrier frequency. Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD) Both paired and unpaired. 2. 3. A nframe spans N Frame = 2, 4, or 8 radio frames. This ingenious method enables full-duplex (simultaneous) communication over a half-duplex (serial-binary) link. 5G Waveforms, Frame Structure, and Numerology | 5G Explained. Slot configuration via RRC consists of two parts. The slot is of 0. In TD-SCDMA a super-frame of 720 ms duration is made of 72 radio frames of 10 ms duration each. 10 ms radio frame, 1 ms sub frame. Then, 5G-NR is recommended to operate with a TDD DL/UL switching period of 5 ms with the pattern of “DDDDDDDSUU” and the DL/UL ratio of 8:2 to attain synchronization with LTE. In this paper, we analyze the performance of SC-FDMA and OFDMA in LTE Frame Structure based on Peak to Average Power Ratio (PAPR) analysis. In the following, only LTE TDD signals with. Then, 5G-NR is recommended to operate with a TDD DL/UL switching period of 5 ms with the pattern of “DDDDDDDSUU” and the DL/UL ratio of 8:2 to attain synchronization with LTE. In LTE TDD, we defined 7 predefined pattern for UL and DL allocation in a radio frame. channel coding. 3rd frame is always used for Uplink transmission Time Division Duplex (TDD) accomplishes this using different time slots for uplink and downlink signals over the same frequency. TDD frame structure type is used.