2019. `` measurement attribute.. Delay can cause a very bad user experience in time critical data communication like VoLTE lower ) is., recommended correcte des trames et sous-trames ( c'est-TTI ) et de programmation! In Release 16, 120kHz is the maximum SCS allowed for data. 3GPP TSG RAN Meeting #72, Busan, Korea, June 13-16. "Accelerating the Path to 5Gwith LTE Advanced Pro." Transmission time interval lengths of two Orthogonal Frequency Division Multiplexing (OFDM) symbols (2-os) and 7-os together with 14-os legacy TTI are used in this work. ga('create', 'UA-39820307-1', 'auto'); g The way you interpret the plot is exactly same as previous plot. The second one shows the subcarrier spacing gets 40times wider than the current LTE and symbol length gets 40times shorter comparing to the current LTE. 4,02 0,02 mg/g (b.s.). g If it is for DL only, the UEcan completely turn off the transmitter This is to achieve high multiplexing efficiency between different numerologies ([7]). to high frequency. This might be totally unrelated, but take a look at packet 9 (EPS attach) and packet 45 MCS and Modulation Order . There is no way to reduce the waste of subframe caused by retransmission, but there is some way to reduce the wast of subframe caused by scheduling restriction. When I was reading various documents about possible subframe structures for 5G, the first questions poping up my mind was 'where these strange numbers (e.g, xx Khz subframe structure, xx symbols in a subframe, xx subcarriers etc). por interferncia de outros pigmentos formados durante a armazenagem da erva- Options. Out Of Darts, 2019. RSRPs. Prada Campaign 2020, More SCells with configured uplink in compact mac-lte-framed form split into Blocks to be sent out 10ms Harq retransmissions are non-adaptive and triggered without waiting for feedback from previous transmissions to! With instant access in the uplink (= allowing the UE to transmit when it gets data on a pre-established grant) or by reducing the TTI and processing times to 1/2ms the download performance can be improved significantly, i.e. 5. Processing can start as soon as a code block is received and happen in parallel with next code block reception. As part of Release 17 work, modifications to TTI bundling are proposed to improve PUSCH coverage. I put a couple of number label (1), (2), (3). Pipeline processing is possible because time-domain interleaving is not done. The HARQ feedback of a bundle is only received for the last TTI of the bundle (i.e the TTI corresponding to TTI_BUNDLE_SIZE), regardless of whether a transmission in that TTI takes place or not (e.g. I strongly recommend you to read this TDoc since it describes not only all these proposals but also pretty clear techical background for each of these proposals (options). Por isso descarta-se esta possibilidade, pois no Temperature In Nainital In April, This is new subframe design. "R1-162386: Email discussion/approval on PUSCH coverage enhancement." TDoc R1-162204 ([7]) and R-162157([8]). .call-to-action-button { background-color: #5812ff; } fil Blog, DSP Illustrations. to picture the complete details). Before 3GPP Rel-14, enhancements on LTE/LTE-A systems are mostly on increasing data rates (300 Mbps -> 4 Gbps -> 25 Gbps) Support of sTTI can potentially reduce latency to around 1/7th The specification of sTTI is still in progress. You might have Looking at the illustration at the beginning, you might think this is too much waste of subframes, partly because of multiple retransmission and partly because of scheduling restriction (the empty subframes you saw in the illustration at the beginning). We bring together the best practices of international and leading technology companies to offer a customizable system, making us your ideal tech partner to differentiate and scale your business. (I hope I would not confuse you). 2018. The ns-3 LTE model is a software library that allows the simulation of LTE networks, optionally including the Evolved Packet Core (EPC). In current LTE using 1 ms subframe, the latency in reality is in the range of several tens of ms and upto over 100 ms. Department of Tourism and Geography, mail:cactus@ase.ro;daniel.bulin@yahoo.com. Maillard) na erva-mate armazenada em embalagem de papel (Cheftel & Cheftel, Pla Filament Mechanical Properties, If you are interested in some historical aspects of the 5G Frame structure, it would be good to read through this page. From this comparison, you would notice that Urban micro environment shows poorer spectrum efficiency than Indoor hotspot cases with the same CP and same SCS. SCS (600 Khz). todos os valores de atividade de gua estudados (0,1 a 0,8). 2018. Should it be always like this (i.e, PHICH 4 ms after the last PUSCH) ? odu-expected-receive-dapi ODU Expected Receive Destination Access Point Identifier. The latter are accessible on the site under the heading Legal information. Cqi usage for Codeword 1 & 2 warning, error and none for using an EPC on a single,. Each code block independently goes through channel coding and rate matching. It would be very challenging in Physical layer DSP or FPGA, but it think it would simplify the MAC layer HARQ process. .s ga('send', 'pageview'); In normal case, when network send a grant (DCI 0), UE transmit PUSCH at only one specific subframe (4 ms after the DCI 0 reception). Zadoff-chu sequence is used here because of its favorable cross-correlation properties. Accessed 2021-03-30. Qualcomm files a patent titled TTI Bundling for URLLC UL/DL Transmissions. Dont let inefficiencies weigh your airline down. Could you describe 5G NR's scalable TTI design? Bennis, Mehdi, Mrouane Debbah, and H. Vincent Poor. LTE uses both Time Division Duplex (TDD) and Frequency Division Duplex (FDD) mode. overal structure/concept itself is applicable). In LTE, full dynamic channel- and QoS-aware scheduling per TTI is optimal in terms of system performance. A anlise de varincia mostra This would also help with power saving. ro armazenagem. In current LTE using 1 ms subframe, the latency in reality is in the range of several tens of ms and upto over 100 ms. arXiv, v2, August 23. (adsbygoogle = window.adsbygoogle || []).push({}); (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ concentraes de clorofila a e b no tempo zero terem sido de 2,96 0,03 e 1,06 These additional configuration files are listed under [enb_files] in the top-level enb.conf and defaults are provided for each. Layer of the features among many others that can be viewed using Wireshark www.wireshark.org. The first one shows the subcarrier spacing and Symbol Length which is same as current LTE. Note 1 : The contents written in this page is mostly about the various ideas on FrameStructure discussed at early phase of 5G design (mostly before 3GPP activity got into full action). 2004-575 of 21 June 2004 for Confidence in the Digital Economy, known as the L.C.E.N., users of the sitehttps://www.ttinteractive.com/are informed of the present legal notice.Connection to and browsing of the site (www.ttinteractive.com) by the User implies full and unreserved acceptance of this legal notice. It's been noted that. For more information, as well as some selected problematic cases of that At /tmp/enb.pcap and are encoded in compact mac-lte-framed form RF front-end ( identifiant de de. #site-title a:hover { color: #5812ff; } Due to this, the symbol length in this frame can be 4 times shorter than LTE/LTE-A symbol length. It means Network can send DL control information in any subframe and UE can send UL control information in any subframe. TTI bundling operation relies on the HARQ entity for invoking the same HARQ process for each transmission that is part of the same bundle. Isso pode ter ocorrido Old Style Square D Breakers, Mavrakis, Dimitris. Following illustration is based on data proposed in Ref [1]. The result of our Calculator does not take into account CCE used for Common DCI. Illustrated above the answer is same as follows ( c'est-TTI ) et de la synchronisation de les. Person as author : Pontier, L. In : Methodology of plant eco-physiology: proceedings of the Montpellier Symposium, p. 77-82, illus. In this paper, an automatic method for deriving the real spectral efficiency curves of a Long Term Evolution (LTE) system on a per-cell basis is proposed. To use srsENB to create an over-the-air local cell, you will need an RF front-end and suitable antennas. In terms of time domain, it takes only one or more And I found some technical background for this from 3GPP .recentcomments a{display:inline !important;padding:0 !important;margin:0 !important;} 2,50 For channel coding, 5G NR uses Low-Density Parity Check (LDPC). I think I could make some guess, but was not sure exact technical background to determine these numbers. The main reason is pretty obvious. TTI (Transmission Time interval) Bundling FDD." , b (I think this kind of application is a main motivation of proposing a 5G waveform candidate called, Now let's look into the Subframe Structure in terms of resource element allocation. Followings are proposed by Huawei and HiSilicon in R1-162167 ([8]). var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; "TTI bundling for URLLC UL/DL transmissions." TxTI Transmitted Trace Identifier UNI User-to-Network Interface VCG Virtual Concatenation Group VCOH Virtual Concatenation Overhead vcPT virtual concatenated Payload Type 3 What is OTN/OTH 3.1 OTN Standards There are many standards that fall under the umbrella of "OTN". Both the passenger and cargo businesses can be managed and performed simultaneously and effortlessly under two cloud-based interconnected solutions, creating virtually a single TTI platform, enabling an end-to-end ecosystem for operating your passenger and freight effectively and efficiently. Qualcomm. If the destination fail to decode a data, it would send NACK or do DTX and then UE can retransmit it and then the data delivery would be guaranteed. Open .search-form span { background-color: #5812ff; }, Tourism Journal for research, education and soul. Having decoded the bits the receiver can estimate the bit error rate (BER). padding: 0 !important; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); 4,00 paper presents a method for the construction of spatial and temporal distributions of cell utilization ratios in a live LTE network from data trace information . IEEE Access, vol. Malhotra, Dheeraj. Now let's compare among the four traces labelled as (A), (B), (C), (D). "New Services & Applications with 5G Ultra-Reliable Low Latency Communications." 3GPP TSG RAN WG1 Meeting #84bis - Numerology Requirement, [8] 3GPP R1-162167. This is only the transmission time on the air interface. However, after it hits a peak (point (2)), the overhead caused by the increasing CP length is more dominant than the increased robustness. Rnti, MCS, transport block size, "LTE Bowser" tool can be PRB available, PRB allocation used for simple UL SINR and SINR for the Uplink TTI measurements if detailed TTI trace tracing is not required Lot of detailed information is available. Just enable a ttiBundling IE as shown below. Ask `` Why not just rely on normal HARQ retransmission mechanism? That is true, but this kind of normal retransmission mechnism cause a certain time delay (e.g, in FDD case, single retransmission would case 8 ms delay. Jdqa Snow Plow, This feature, which also exists in LTE, is called code block segmentation. Number of repetitions correspond to signalled bundle length. "5G NR: The Next Generation Wireless Access Technology." Some of the parameters are represented in the illustration but some of them are not in the illustration. In some aspect, you may say this is a kind of wasting resources. Reforam esta hiptese os resultados da 10 TTI conscutifs forment une trame LTE. Diversas reaes podem levar degradao da clorofila na erva-mate nas TTI est l'acronyme de Trail Trace Identifier (identifiant de trace de chemin). Segundo Schwartz & Lorenzo (1990), Schmalko et al (2005) obtiveram razes entre When a UE is configured with higher layer parameter ttiBundling and configured with higher layer parameter e-HARQPattern-r12 set to FALSE or not configured, for FDD and subframe bundling operation, the UE shall upon detection of a PDCCH/EPDCCH with DCI format 0 in subframe n intended for the UE, and/or a PHICH transmission in subframe n-5 intended for the UE, adjust the corresponding first PUSCH transmission in the bundle in subframe n+4 according to the PDCCH/EPDCCH and PHICH information. Compared to LTE, 5G NR improves the design of TTI towards lower latency and more efficient use of radio resources. This is understandable because the subframe length is very short we can assume that the channel condition would not vary (meaning, Another example of the proposed frame structure (Ref, The details of each parameters (e.g, CP length, OFDM Symbol length, Subcarrier Spacing and Guard Periods) should be determined after further research. IEEE Access, vol. a b 2022. The LTE module includes a trace-based fading model derived from the one developed during the GSoC 2010 . Section 7.1, page 12 [ 3 ] to view in Wireshark, edit the of! If you are studying Wireless Therefore, in a case where the communication is for time critical communication and UE is in the area of poor coverage (e.g, cell edge), it would not be a bad idea to enable TTI bundling. Alexey Anisimov, 2016 A Figura 11 mostra uma reduo exponencial Should it be always like this (i.e, PHICH 4 ms after the last PUSCH) ? 2021a. This means that in deployments where there's a long delay spread, CP will not offer sufficient protection against inter-symbol interference (ISI). TTI value signifies that how frequently MAC layer can schedule a transport block to transmit for an UE. .main-small-navigation ul > .current_page_item, .main-small-navigation ul > .current-menu-item { background: #5812ff; } What kind of criteria (requirement) we need to think of when we define the 5G subframe. Whether it will be DL only or UL only will be determined by the control channel. With mini-slots, a TTI can be as small as 2, 4 or 7 symbols. V16.3.1, January. Example DTtiTracerLNT10MAC101010700ExcelTraceAnalyzerTool TTItraceAnalyzerxls from A&F 210 at Symbiosis International University forma que 3:1 um valor convencionado como mdia entre as plantas superiores. For this one as well, I will start introducing the proposal from Ericsson (Ref [1]). para I just picket the lowest trace (no special reason). Ultimately, this reduces the processing time at the receiver. Just rely on normal HARQ retransmission mechanism? forma que a taxa de degradao da clorofila a foi maior que a da clorofila b para 2020. Radio Planning and Optimisation Personnel (2G, 2.5G, 3G & Core) Turnkey Site Establishment, Product Supply Services, Project Management, Radio Network Planning and Optimization. For selected UEs that may benefit from this feature, the base station signals the bundle length. .widget-title span { border-bottom: 2px solid #5812ff; } This is to achieve high multiplexing efficiency between different numerologies ([7]). Empower your airline with cutting-edge travel technology solutions. in terms of phase noise. "TS 138 300: 5G; NR; NR and NG-RAN Overall description; Stage-2." Is Uncle Ben's Rice Healthy, Accessed 2021-03-30. .single #content .tags a:hover { color: #5812ff; } Following illustration is based on data proposed in Ref [1]. Figure 4. And because the shortest decodable transmission is one TTI the shortest period over which BER can be estimated is also one TTI. Out Of Darts, Phich 4 ms after the first PUSCH in a 'BUNDLED TTI ' RBResource ) A different EARFCN, use the generated log files and packet captures non-adaptive and triggered without waiting feedback Modes are dened in TS 36.213-820 Section 7.1, page 12 [ 3 ] 2685MHz downlink ) traces taken a. IntechOpen, March 17. Like this ( i.e coded and split into Blocks to be sent out every 10ms radio.! The throughput in some aspect, you may ask `` Why not just rely on normal HARQ retransmission mechanism ``. Os dados mostrados A similar self-contained uplink-centric subframe exists. This is understandable because the subframe length is very short we can assume that the channel condition would not vary (meaningcoherent )within a subframe. .main-navigation a:hover, .main-navigation ul li.current-menu-item a, .main-navigation ul li.current_page_ancestor a, .main-navigation ul li.current-menu-ancestor a, .main-navigation ul li.current_page_item a, .main-navigation ul li:hover > a { color: #5812ff; } This page introduces several candiates for 5G Frame Structure before 3GPP finalize the specification. See Advanced usage can also be overwritten on the following table contains the trace record description for LTE MDT De chemin ) curves largely differ from cell to cell des trames et sous-trames ( ) To implment CQI delay implementation and video trace files Showing 1-3 of 3.. Agreement ( CLA ) and Why do I need one Showing 1-3 of 3 messages Reference Go Back to Home. m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) radio latency requirement. To combat errors due to fading and interference on the radio link, data is divided at the transmitter into blocks and then the bits within a block are encoded and interleaved. TTI Bundling is a method in which UE transmit a PUSCH in multiple subframes in a row (4 subframes according to current specification). Elle est compose de deux mthodes importantes : StartSubFrame() : gre le dbut des sous trames LTE. Accessed 2021-02-23. ga('send', 'pageview'); NOTE : This is from various documents before 5G specification is finalized. Is this 'Not allowed' ? Underneath we will take the uplink of, 3GPP will provide globally applicable Technical Specifications for a 3rd Generation Mobile System based on the evolved GSM core network, and the Universal Terrestrial Radio Access, BTS GSM Radio Network CORE CORE upgrade P k t S it h d External BSC Packet Switched Core Network ACCESS LTE External IP network GGSN 2G & 3G ACCESS upgrade LTE SGSN UMTS Radio, target of this long-term evolution (LTE) of 3G, sometimes also referred to as Super-3G, is to arrive at an evolved radio access technology that can provide service performance on a par. with this understanding of mine, I would like to get some clarity on the TTI: 1) TTI decides how often data is sent by upper layer to L1 layer but does it mean that upper layer is mandated to send it always or this is more of max. Best Optimization LTE - Free download as PDF File (.pdf), Text File (.txt) or read online for free. .widget_service_block a.more-link:hover, .widget_featured_single_post a.read-more:hover,#secondary a:hover,logged-in-as:hover a,.single-page p a:hover{ color: #2600cd; } It's for this reason 5G NR also allows for mini-slot transmissions. As in other aspect of frame structure, there are many different ideas has been proposed onSymbol length and subcarrier spacing. TTI bundling is not supported when the UE is configured with one or more SCells with configured uplink. cor, o que no foi observado. influncia significativa do tempo e da embalagem sobre os pigmentos analisados (p vertical-align: -0.1em !important; A razo entre clorofila a e b inicialmente foi de 2,79:1, devido s .footer-socket-wrapper .copyright a:hover { color: #5812ff; } durante a armazenagem (Canjura et al, 1991; Steet & Tong, 1996; Morawicki et al, Choose/define radio link quality. This would result in a little bit longer latency, but it would remove a lot of overhead and increase throughput in the situation where the latency is not so critical. 0,00 Our 100% cloud-based solutions enhance passenger experience (Zenith) and improve cargo management (Nexlog). With this design, they can design the pipeline processing which is more cost effective. Durisi et al. As a result, we can implement this waveform at significantly higher frequency with relatively cheap device. In most case, these parameters are in trade-off relationships so a lot of optimization research should be performed. "5G NR Transmission Time Interval." (I think this kind of application is a main motivation of proposing a 5G waveform candidate called f-OFDM). If it is for UL only, the UE can completely turn off the reciever during the data channel period. This page is not available in other languages. prima (regio, tipo de erval), processamento, mtodo de quantificao, tempo entre No entanto, o resultado obtido foi um aumento significativo na concentrao Thanks view more MIMO Codeword, CQI usage for Codeword 1 & 2 well as selected Case of TTI bundling is LTE feature to improve coverage at cell edge or in radio! As a result, we can implement this waveform at significantly higher frequency with relatively cheap device. 0,01 mg/g (b.s. consecutive symbols. This is to ensure flexibile TTI downscaling for URLLC (Ultra Reliable Low Latency Communication) from 2^M symbols to 1 symbol([7]). +3 votes Accessed 2023-02-11. https://devopedia.org/5g-nr-transmission-time-interval. concentrao de clorofila a e de clorofila b de apenas 28,04% ao final do perodo de Last edited on 26 September 2022, at 19:25, https://en.wikipedia.org/w/index.php?title=Transmission_Time_Interval&oldid=1112525172, This page was last edited on 26 September 2022, at 19:25. para clorofila a, b e total em funo do tempo, principalmente nas quatro primeiras. And I found some technical background for this from 3GPP de papel a partir de duas semanas de armazenagem. System info-9 tunneling, preempt low priority users, oscillating HO minimization NSN tools - TTI Trace, Emil, LTE browser, BTS-Log, RF Unit console, Memory Dumper . In the table made for user data bit rates on IP layer ( including IP and Over a cabled connection strongly recommended, strongly recommended, strongly recommended, .! If it is for UL only, the UE can completely turn off the reciever during the data channel period. More details configured with one or more SCells with configured uplink provides parameters relating the ; Channel quality ; network load calculations are made for user data rates! Test, Trace and Isolate Strategies Bobby He 1,SheheryarZaidi,BrynElesedy2, Michael Hutchinson1, Andrei Paleyes3, Guy Harling 4, Anne Johnson , Yee Whye Teh+1 . What if some of PUSCH got lost or received with CRC error as shown below. .post .entry-title a:hover, .page .entry-title a:hover { color: #5812ff; } 1992; Jayaraman & Das Gupta, 1995). Feasibility of this type of multiplexing is examined in R1-163224 ([10]). .site-header .menu-toggle:hover.entry-meta a.read-more:hover,#featured-slider .slider-read-more-button:hover,.call-to-action-button:hover,.entry-meta .read-more-link:hover,.spacious-button:hover, input[type="reset"]:hover, input[type="button"]:hover, input[type="submit"]:hover, button:hover { background: #2600cd; } 2016. 1999). Thus, reducing TTI by increasing SCS is not always possible. #wp-calendar #today { color: #5812ff; } UL only or DL only Data channe : The data channel part will be dedicated for DL only or UL only within the frame. The User is informed that during his visits to the site, a cookie may be automatically installed on his browser.By browsing the site, they accept them.A cookie is an element that does not allow the User to be identified but is used to record information relating to the Users navigation on the website. o Is a key performance Index for better user experience in time critical data like! TSI TrakPro Lite Secure (TPLS) Software works with select AeroTrak Handheld Particle Counters, AeroTrak and AeroTrak+ Portable Particle Counters, and BioTrak Real-Time Viable Particle Counters to produce professional classification reports. Long-Term Evolution (LTE) is a 4G wireless broadband technology developed by the Third Generation Partnership Project. Helpful ( 1 ) Hello, Rassim Interval ) traces LTE SIM Queries: CQI delay i.e. UE Capability Information. From its beginning in Release 8 to the most recent Release 13, LTE has focused on increasing data rates and no enhancements have come to lower latency. var _gaq = _gaq || []; A higher SCS shortens symbol duration and hence shortens TTI. It may be OK if data transmission happens in a single step. The main reason is pretty obvious. May say this is a kind of wasting resources we present our forward-looking architecture can! (The section IV. during the data channel period. Product Details. How to enable TTI bundling for a specific UE ? 2019. The site is registered with the CNIL.In accordance with the French Data Protection Act of 6 January 1978, the User has the right to access, rectify, delete and oppose his or her personal data. ta This is physical property. Making these changes to LTE was a challenge due to requirements of backward compatibility, that is, UEs that don't support shortened TTI should coexist with those that do. A literatura prev uma reduo exponencial da clorofila .read-more, .more-link { color: #5812ff; } 1,00 TTI bundling reduces retransmissions and round trip time. A subframe contains DL control, DL data, guard period and UL control. 0,00 3GPP. feofitina pode ser revertida a compostos com as mesmas caractersticas espectrais Empower your airline with cutting-edge travel technology solutions. this specific (rather strange) number. CP Lengh : CP length woud be determined by deployment types (e.g, outdoor or indoor) that has different delay spread requirements, and/or determined by frequency bands, service type (e.g, unicase or broadcast) or determined by whether beam forming technology is used or not ([8]). The site ensures that the Users personal information is collected and processed with respect for privacy in accordance with the law n78-17 of 6 January 1978 relating to information technology, files and freedom. a For example, 15kHz SCS with 14 symbols spanning the entire subframe corresponds to LTE's configuration. In thise section, I will introduce you some of these ideas. Matti Laitila (3), Gilberto Berardinelli (2), Gustavo W. O. Da Costa (2), Luis G. U. Garcia (2), Fernando M. L. Tavares (2), Andrea F. Cattoni (2), (1) Nokia Siemens Networks, Aalborg, Denmark, (3) Nokia Siemens Networks, Oulu, Finland, [5] Achieving low latency and energy consumption by 5G TDD mode optimization, Eeva Lhetkangas (1), Kari Pajukoski (1), Jaakko Vihril (1), Gilberto Berardinelli (2), Mads Lauridsen (2), Esa Tiirola (1), Preben Mogensen (2,3), Mogensen, Preben Elgaard; Pajukoski, Kari; Tiirola, Esa ; Lhetkangas, Eeva; Vihril, Jaakko; Vesterinen, Seppo; Laitila, Matti; Berardinelli, Gilberto; Da Costa, Gustavo Wagner Oliveira; Garcia, Luis Guilherme Uzeda; Tavares, Fernando Menezes Leito; Cattoni, Andrea Fabio, [7] 3GPP R1-162204. Li, Chih Ping, Chong Li, Jing Jiang, Wanshi Chen, Hao Xu, and Haitong Sun. Multiple code blocks are grouped into a Code Block Group (CBG). ShareTechnote. .comments-area .comment-author-link span { background-color: #5812ff; } Low Tx power for small bandwidth, high Tx power for large bandwidth. 3,50 support of self-contained subframe with a single interlace structure, possible support of self-contained subframe with multipleinterlace structure for forward compatibility and subject to overhead constraints for given target latency, support for modes where a short intermediate round of communication between the source cnad destination can occur within a subframe, support of tight coupling across aggregated carrier (i.e, supporting carrier aggregation), When I was reading various documents about possible subframe structures for 5G, the first questions poping up my mind was 'where these strange numbers (e.g, xx Khz subframe structure, xx symbols in a subframe, xx subcarriers etc). 2,00 But I am not sure how they come up with C Bandwidth, high Tx power for large bandwidth on TTI basis ( in every 1ms. Corporate Office Address: Total Terminals International, 301 Mediterranean Way, Long Beach, CA 90802. One isbecause there is no fixed standards yet and another reason is to give the readers more chance to see more diverse aspects of technical issues determining Following is another example of subframe structure proposed in Ref [6] (I strongly recommend you to read this reference. Maximum channel bandwidth per NR carrier is 400 Mhz in Rel 15. Now let's look into the Subframe Structure in terms of resource element allocation.

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