Use the LTE Toolbox™ to create a frame worth of data, pass it through a fading channel and perform channel estimation and equalization. The structure of LTE TDD frame is defined by the Uplink/Downlink Configuration, that specifies which subframes are configured as downlink, which are uplink, and which are special subframes,. In the FDD mode, the downlink path (DL), from the eNodeB to user equipment (UE), and the uplink path (UL),. CMCC,CATT, etc. You might have experience how much complicated (confusing) it become about HARQ process in LTE in TDD mode. For the normal mode, the first symbol has a cyclic prefix of length TCP = 160 ⋅ Ts ≈ 5. The screen shot below shows the parameter choices for a DL-SCH n channel. 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. Accordingly, LTE supports two kinds of frame structures: frame structure type 1 for the FDD mode and frame structure type 2 for the TDD mode. When operating in TDD mode, we have to clearly define on exactly when to expect the transmission and when to expect the reception. Whereas further optimizations can be made for Frequency Division Duplexing (FDD) systems, the combination of sTTI and Time Division Duplexing (TDD) has limits. LTE TDD frame 36. in Figure 1. There are two types of LTE frame structure: Type 1: used for the LTE FDD mode systems. Signal ModelTime Division Duplex (TDD) accomplishes this using different time slots for uplink and downlink signals over the same frequency. A 5G frame structure designed for efficient support of users with highly diverse service requirements is proposed. It is. 5G NR supports both FDD and TDD using a common set of frame structures. 8. 8 Mbit/s, which is an eight-fold increase. 211). 2 μs. 7 μs. 331 v15. 2 TDD Configurations The goal of the CBRS Alliance is to allow flexible use of CBRS band if coexistence of multiple deployments is preserved. In the N7625C Signal Studio software, click a different channel to view that channel's parameter choices. 7K views 2 years ago. Just take a look at the overall uplink slot structure. Systems, apparatuses, methods, and computer-readable media are provided for a user equipment (UE) device that includes one or more processors configured to determine, based on a DL signal in an LTE-TDD radio frame, that an eNB has assessed, based on a Cat-2 listen before talk (LBT) procedure, that a radio frame is valid; and in response to. 5 times higher compared to a classic LTE 4×4 configuration. , RRM, admission and connection control, and. This overview covers both LTE-Advanced FDD Type 1. There are two topologies used in LTE system viz. When operating in TDD mode, we have to clearly define on exactly when to expect the transmission and when to expect the reception. 2와 같이 프레임 구조 (Frame Structure)가 다르다. 2. 2. It is a TDD type of frame structure which is a natural choice since ETSI band 54 and FCC band 902–928 MHz are both unpaired bands. LTE-TDD systems provide 7 different semi-static UL-DL configurations of an LTE frame to offer asymmetric DL-UL allocations (see Table II), hence providing DL-UL allocation ratios that vary from 4:6 to 9:1 (the number of DL-UL subframes) [12]. LTE TDD is designed to co-exist with 3GPP TD-SCDMA, and as a result, uses the same frequency bands and frame structure. Can schedule 1 DL and multiple UL sub-frame at a time. it means the start of the LTE frame is found and frequency. 2 Mbit/s to 1. In 5G/NR, we don't have any predefined pattern. As shown in the figure below, an LTE TDD frame is made of total 20 slots, each of 0. Part 2, Advanced topics in LTE 11:00 – 12:30 The LTE MIMO modes Codebook-based precoding Closed. e. 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. There are seven possible configurations for LTE TDD frame as shown below. Subcarrier (SC)In LTE, the parameter N TA,offset is fixed, based on the FDD or TDD mode. . 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. 7. 7 shows a comparison of the achievable DL:UL data rates between the proposed frame structure and the LTE TDD frame structure. System Information. g. TDD stands for Time Division Duplex where as FDD stands for Frequency Division Duplex. 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. especially for LTE-TDD networks. In TDD, each slot can be flexibly configured into uplink and downlink symbols. 6 symbols. In 5G/NR, we don't have any predefined pattern. This applies for the currently-transmitting Starlink satellites (versions 0. Fig. As seen in the figure, in each frame some subframes are allocated for uplink transmissions and some subframes are allocated for downlink transmission,. 1 provides an illustration of an LTE FDD and TDD frame structure as an example of an air interface with FDD and TDD modes. PMP frame to this LTE frame, the downlink start has to align to the beginning of subframe 4, not subframe 0. A method and system are provided for supporting co-existence of a first radio access technology (RAT) and a second radio access technology in adjacent channels, the boundary of subframes, downlink to uplink (DL: UL). FDD frame structure type is used. Downlink. 2 μs. Radio frames and subframes are of fixed lengths. In TDD there are. (Preamble format 4 is used only in TDD LTE. Can schedule 1 DL and multiple UL sub-frame at a time. What is claimed is: 1. Frame Stracture. Subcarrier (SC) spacing of 15kHz is used, leading to OFDM symbol length of 66. LTE Devices Growth in India: Band 40 and 41 4. “10ms” version, and gives greater opportunity for uplink/downlink flexibility. 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. At the initial phase of LTE develoyment, you haven't doubt on that every LTE subframe would carries CRS(Cell Sepecific Reference Signal) in it. But as we see more diverse types of subframe structure (FDD-frame structure Type1, TDD -frame structure Type 2, LAA - frame structure type 3), I see my confidence gets weaker. 1 LTE Physical Layer. Frame structure in LTE-TDD systems. Type 1 LTE Frame Structure. Fig. cyclic prefix). 7µs. Two duplexing methods are den ed in LTE, namely Time Division Duplex (TDD) and Frequency Division Duplex (FDD). Part 1, LTE Basics 9:30 – 10:30 Introduction to LTE FDD/TDD frame structures and reference signals Physical channels, logical channels PHY signal processing architecture H-ARQ processing, H-ARQ timing UE categories. 4. FDD LTE is ideal for symmetric traffic, while TDD LTE is ideal for asymmetric traffic. 9 Physical signals Physical signals are used in LTE to allow cell synchronization and channel estimation. In LTE TDD, there are 7 predefined patterns for UL and DL allocation. FDD The uplink FDD frame contains only uplink user transmissions and is same length as the. It includes support for mobile broadband data, mission-critical communication, and massive machine communication. TBS Index Advanced LTE TDD Carrier–DownlinkLTE-Advanced Physical Layer Overview. As a result, the uplink power level due to SC-FDMA also need to be increased by 2~3dB to compensate for the extra noise due to more spreading. The Fading parameters are available for Advanced LTE and Advanced LTE-A TDD. As shown in Figure 3(a) , in the simultaneous operation of an LTE-U within a WiFi coverage area, the DL LTE-U radio link experiences interference from other LTE-U DL and WiFi UL transmissions. This avoids inter-network interference. Number of OFDM symbols per slot, slots per frame, and slots per subframe for normal cyclic prefix. 위의 그림이 FDD에 활용되는 Type1의 Frame 구조다. 72 (=0. Learn the basics behind 5G NR waveforms, frame structure, and numerology. frame structure optimization indicated higher. In Extended CP, number of symbols within a slot is decreased. The slot is of 0. The remaining six symbols have a cyclic prefix of length TCP = 144 ⋅ Ts ≈ 4. Frame-Structure in LTE. LTE standard has been published by 3GPP as an extension of UMTS (based on 3GPP standard) and 1xEV-DO (base on 3GPP2 standard) technologies. The frame consists of two "half-frames" of equal . UE hence learns the frame structure in the subframe. One slot made up of 7 small blocks called 'symbol'. Single Ack/Nack corresponding to 1DLsub frameFrequency Division Duplex (FDD) and Time Division Duplex (TDD) are the prevailing duplexing scheme in LTE that provides deployable tractability according to spectrum assignation. Hence there are total 20 slots in a radio frame. Using the latency model shown in Figure 11. For LTE TDD, the frame configuration 2 is the most widely used frame structure, i. Slot configuration via RRC consists of two parts. LTE-FDD와 LTE-TDD의 기술적인 차이는 통신 계층으로 보면 Layer 1 (Physical layer)만 다르다. 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. With this shift, the sequence of subframes in the LTE frame becomes D, D, S, U, U, which is the same structure of the Cambium PMP frame (downlink, turnaround time, uplink). 25 MHz to 20 MHz. LTE FDD uses 10ms frames, divided into 20 sub-frames or slots (of 0. 5), there is a single carrier frequency and uplink and downlink transmissions are separated in the time domain on a cell basis. There are three types of Frame Structure : Type 1 for FDD, Type 2 for TDD, Type 3 for LAA. Frame structure type 2(for 5ms switch-point periodicity) Figure 22. The target 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. 2 MHz for interworking with LCR TDD, but these were removed when the LTE TDD frame structure was aligned with the FDD frame structure rather than the TD-SCDMA frame structure from UMTS. A. The HI all,Please go through video of LTE Frame Structure (FDD and TDD). 10 ms radio frame, 1 ms sub frame. Fig. Timing and Synchronization – Essential for 5G-NR TDD network successof the TDD configuration structure. LTE DL Frame Structure in a Nutshell. A phone must typically perform the following tasks (Figure 5): Acquire a signal on a given LTE carrier frequency. During this time period equivalent to RTG gap, both BS and SS do not transmit any data. LTE TDD Frame Configuration These first three groups of settings apply to all basic carriers. 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. 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. 3GPP Release 8, 2009. LTE-TDD) network, IMT-2020 networks operate with new frequency band, wider operating bandwidth, active antenna system (AAS) and higher UE transmit. LTE-TDD and NR-TDD CBSDs, GAA channelization and SAS-CBSD protocol extensions. Uplink and downlink configurations are used to create subframes (0 to 6). 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 this paper, we study the frame structure design for low latency communications in 5G TDD systems. OneAdvisor Realtime Spectrum – LTE-FDD LTE-TDD Frame Structure LTE-TDD Structure LTE-TDD transmission is done in 10ms frames containing 10 sub-frames of 1ms and 20 slots of 0. The subcarrier spacing is f=15kHz LTE supports two radio frame structures Type 1, applicable to frequency division duplex FDD Type 2, applicable to time division duplex TDD 1 radio frame = 10ms 1 subframe= 1ms 1 slot = 0. Subframe is of fixed duration (i. In TD-SCDMA a super-frame of 720 ms duration is made of 72 radio frames of 10 ms duration each. Figure 3 shows the frame structure for LTE in FDD mode (Frame Structure Type 1). 1. 10 – Frame structure of transmission signal for LTE-TDD. In TDD LTE uses two 5ms half-frames. Further each radio frame is divided into two sub frames each of 5ms. Each radio frame will have a total of ten subframes, each with two time slots. 7 μs. Note the similarities to the LTE standard for the 20 MHz transmission mode . There are seven possible configurations for LTE TDD frame as shown below. In frame structure Type 1, each 10 ms radio frame is divided into 10 equally sized subframes. Long Term Evolution (LTE). A TDD frame structure similar to that in [39, Figure ] is considered for all the BSs and UEs with synchronous operation. 3. Under the flexible frame structure, each radio frame consists of a plurality of slots, and each slot within a radio frame has a flexible slot type. Frame Structure and Crossed Slots LTE-TDD frame consists of 10 sub-frames of 1 ms each. A. • In UMTS TDD, both uplink and downlink shares same frequency band at the same time period. Long Term Evolution. But in NR, the number of slots per subframe varies with numerology ( increases with SCS ). As shown 5 ms periodicity frame have two “S” sub frame and 10 ms framesIn LTE TDD, we defined 7 predefined pattern for UL and DL allocation in a radio frame. Check out the Episode 13 of Field Journal to get answers to questions like:Time division duplex (TDD) plays an important role in 5G systems because it employs an unpaired spectrum and offers channel reciprocity. We have investigated the suitable IO before designing the radar system. This example shows how to create a frame containing the cell-specific reference signals (CellRS) in each subframe. Can Schedule 1 DL and 1 UL subframe at a time. 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. In addition, LTE air interface supports both frequency division duplexing (FDD) and time division duplexing (TDD). Frame structure Type 3N builds on the 3GPP frame structure with the addition of the new nframe concept. It is defined as 1/(15000 x 2048) seconds (=0. e. TDD Frame Structure LTE’s frame structure ‘type 2’ supports Time Division Duplex (TDD) mode. Hi All,There are lot of new member joined so i am providing the links of ORAN videos whi. Each frame is divided into ten equally sized subframes. There are three types of Frame Structure : Type 1 for FDD, Type 2 for TDD, Type 3 for LAA. Each frame is divided into ten equally sized subframes. Figures 1 and 2 show the frame structures referenced in Table 1 . 5 ms repetition period. balance between resolution of channel quality estimation and. As shown in Fig. Downlink Uplink Frame. However, employing TDD will lead to a long transmission latency due to the uplink/downlink transmission constraints. 4G/LTE - MBSFN. 7 to 12. 1. Mandatory Guard Period in TDD Bands makes them highly inefficient if used in lower frequency configurationThe LTE TDD frame structure is Type 2. 2 Challenges in deployment in 2300 MHz band 5. 2 TDD PDSCH Single Antenna Port Performance with 1 PRB. 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. < LTE FDD Uplink Frame Structure >. These are Type 1 when FDD is used and Type 2 when TDD is used. tdd UL/DL Common Configuration (tdd-UL-DL-configurationCommon) in Detail . N/A. Very Basic understanding of Frame , subframe , slots and OFDM symbols1. However the system structure of LTE TDD is different from of that in LTE FDD. A TDD includes a special subframe that has two pilot timeslots such as uplink and downlink that are separated from a GP (Guard. 5 milliseconds. • A radio frame has duration of 10 ms. In LTE TDD, we defined 7 predefined pattern for UL and DL allocation in a radio frame. In 5G/NR, we don't have any predefined pattern. The useful symbol time is Tu = 2048 ⋅ Ts ≈ 66. 9 PDSCH REs in1 radio frame and 2 Tx antennas, TDD mode 0. Figure 1 shows frame structure type 1, which can be used in either full-duplex or half-duplex FDD mode. 즉, 1개의 Radio Frame은 10개의 Subframe!! 여기서 1ms의 Subframe 길이가 TTI (Transmission. 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. The 5G NR frame structure is defined by the 3GPP and here we present details of the NR Frame Structure that is specified in 3GPP specification (38. LTE TDD frame structure is shown . 5 ms, T FA is the radio frame alignment which depends on various configurations of the TDD frame structure, and the TTI duration is 1 ms, hence, the user-plane latency of the TDD mode can be written as T USER-PLANE = 3. · Radio frame size= 10 ms. At least one of said second number of subframes is made to comprise at least three parts, as follows:. In TDD spectrum, for small/isolated cells it is possible to use dynamic TDD to adapt to traffic variations, while for large over-the-rooftop cells, Frame structure. 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. But anyway good thing to me was that the most important factors in uplink slot is same as the one in the downlink. LTE Introduction. 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. There are three wireless carriers in China nowadays supporting TDD-LTE and FDD-LTE services. Time Division Duplex Wireless is a fundamental technology for 5G deployments around the world. . · Time slot size= 0. Compared with the 3. 211 frame structure type 2 (DL / UL / SSF) Filter. 5ms duration. In the special slot, symbols allocated for downlink, gap and uplink are 10:2:2 respectively. One sub frame is composed of 7 normal time slots used for downlink/uplink and 3 special time slots. Frame: N+1) in the wimax frame structure. Determine frame synchronization and cell identification (cell search procedure) based. 5 + T FA + p T RTT where T RTT is the. . Each subframe composed of 2 time slots. China adopted frame configuration DDDSUDDSUU (5ms) to support long PRACH formats and South Korea adopted. com This page covers LTE Frame structure including subframe and slot structure. 5 ms); one slot consists of seven OFDM symbols. 5 GHz range use a common 5G NR frame structure. TDD LTE-A frame, presented in Figure 1, has been built on top of the LTE frame structure type 2 [8]. Frame structures of these two working mode are presented in Fig. BCH, CFI,. 21). 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. 1), where the downlink and uplink transmissions are per-formed in different carrier frequencies. Frame Structure Type 2: TDD. OEO116120 LTE eRAN3. In this paper, we study the frame structure design for low latency communications in 5G TDD systems. LTE TDD frame structure is shown below. The figure depicts carrier aggregation used in LTE TDD mode frame. – Frame structure type 2 (FS2): TDD. In the case of TDD operation (frame structure type 2, middle part of Figure 5. The table shown below is outlining key parameters of the 5G network's physical layer frame structure for different numerologies (denoted by μ). An exemplary method includes obtaining an indication of whether a carrier frequency of the NR network coexists with a carrier frequency of a long term. The TDD guard period must be long enough for the farthest NB of which the signal still could be seen. Type 2 LTE Frame Structure. There are two types of LTE frame structure: Type 1: used for the LTE FDD mode systems. It consists of a 10 ms radio frame divided into 20 slots, numbered 0 to 19, each with a duration of 0. 1. 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. Difference is that in LTE TDD, a half-frame of length 5 ms has both uplink sub-frame and downlink sub-frame, a number of uplink sub-frames and downlink sub-frames is configured by the. Conformance Test Setup. Figure 1. 5 GHz band, the uplink peak data rate increases by 18. 7 μs. . Frame Structure, Bandwidth Mode, CP Mode, and Physical Resource Grid. From a network verification perspective, this means that for NSA NR deployments the performance of the 5G devices from an accessibility, retainability and mobility perspective will be closely aligned to and dependent upon the performance of the underlying LTE network. 가장 큰 차이점은 프레임 구조와 HARQ이다. LTE will bring many. Myung 17 Frame Structure • Two radio frame structures defined. know, one sample (Ts) is 1/30. The default parameters for national TDD synchronization should be defined before awarding the spectrum. Figure 7A illustrates a CA frame structure 700 for a TDD-TDD carrier aggregated PUSCH-less cell arrangement for data transmission between a UE 115 and BS 105 according to some. 7 μs. 1. NOTE: * E-UTRA TDD UE will have a relatively lower Noise Figure since it does not have a duplexer. Therefore, the accuracy. 12 to enable features such as aggregation of carriers between time-division duplex (TDD) and frequency-division duplex (FDD) frame structures. Hi All,There are lot of new member joined so i am providing the links of ORAN videos whi. In 5G/NR, we don't have any predefined pattern. 00 - View presentation slides online. 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. Interference with neighboring Base Stations. Main differences in LTE Frame Structure between the two modes are. Figure 1 show s the frame structure fo r LTE TDD . Special Subframe Design for Optimized TDDsteps required to estimate synchronization structures that are likely unique to Starlink. In LTE TDD, we defined 7 predefined pattern for UL and DL allocation in a radio frame. 11 and Rel. 3 TDD LTE Growth in the market 3. A nframe spans N Frame = 2, 4, or 8 radio frames. LTE Downlink Channel Estimation and Equalization. The LTE physical layer supports two types of frame structures as types 1 and 2. 2 DSUDDDSUDD (10ms duration), where different special subframe “S” configurations are possible such 1 The LTE frame is formed of 10 subframes (SF) of duration 1 ms each and sub-divided into 14 OFDM symbols. 3. 3GPP defines two types of frames based. Initial Cell Search and Cell Selection. 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. and slot 12 (Subframe 6) in TDD. The n78 band’s popularity is due to its relatively common availability, compared to lower cellular spectrum (below 2700MHz) already widely in use by 3G and 4G networks. if we chose subframe configuration 7(Frame structure type 1), T_SFC become 5 and Delta_SFC become {0,1}. At least one of said second number of subframes is made to comprise at least. In TDD (Time division duplex) technique we are using, same frequency or frame for both DL and UL but at a different time. prodevelopertutorial May 17, 2020. Finally, each subframe is split into two timeslots, each with a duration of 0. Length of one slot is fixed. 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. Frame Structure Candidates . LTE physical layer tutorials. The frame can be dynamically configured to any one of the preset configurations shown, depending on the instantaneous data transmission requirement. So, it is very important to understand the slot structure and other details about slot-based scheduling etc. LTE network offers about. In the TDD duplexing mode, a single bandwidth is shared between uplink and downlink, with the sharing being performed by. 2. They are chosen to be the same as in LTE, thereby allowing for better LTE-NR co-existence. Increasing frame configuration; Configuration: 3GPP release: Downlink to uplink switch point. 2. 3. Under the proper design of frame structure, we showed that the proposed scheme is compatible with LTE-A protocol, and the collision with LTE-A signal can be prevented. LTE supports two radio frame. subframe is transmitted or uplink. As a result of the differences in the radio frame structure between LTE TDD and LTE FDD, the resource elements are also configured differently. In 5G/NR, we don't have any predefined pattern. • The equipment requires to be switched between transmission and reception. LTE frame is 10 ms in duration and consists of 10 subframes. 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. Figures 10. There are two types of LTE frame structure: 1. UL Control Channel. 1 The NG-RAN. UE hence learns the frame structure in the subframe. One TDD frame is composed of í µí± = 10 subframes, and the time length of each subframe is 1 millisecond [3]. LTE also support both TDD and FDD, but unlike the single frame structure used in NR, LTE uses two different frame structures. The actual LTE (4G) is based on 3GPP Release 11. One of the design principles of 5G NR has been the ability to coexist within the LTE physical layer structure to allow for sharing the existing 4G spectrum with new 5G devices. LTE Protocol Stack. 8. The solution encompasses flexible multiplexing of users on a shared channel with dynamic. Very Basic understanding of Frame , subframe , slots and. 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. 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. 5 ms. 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)). PMP frame to this LTE frame, the downlink start has to align to the beginning of subframe 4, not subframe 0. There are two types of LTE frame structure: Type 1: used for the LTE FDD mode systems. 1ms) where as slot length varies based on subcarrier spacing and number of slots per subframe. 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. < TDD UL/DLConfiguration 0, Special Subframe Config 0 > < TDD UL/DLConfiguration 1, Special Subframe Config 0 >Strategies and Implementations to Support Multiple Wireless Protocols with a Single RF Front-end A Thesis Presented by Mohamed Abdelrahman MohamedIn many countries, n78 (3500 MHz), or commonly referred to as the 3. (FDD) or unpaired (TDD) spectrum allocation • Mobility – Optimized for 0~15km/h – Support with high performance for 15~20 km/h.