Lte schedulers are part of layer 2 protocol stack and are one such module which can dramatically increase or decrease the performance of the system. Lte project aims to ensure the continued competitiveness of the 3gpp technologies for the future lte focuses on download rates of 100 mbits, upload rates of 50 mbits per 20 mhz of bandwidth, increased spectrum efficiency and sub5ms latency for small ip packets. There are three synchronization requirements in lte. Solving the global lte multimode and multiband challenge. Voorvertoning gebruiken om pdfs te combineren op een mac. With the matured standards for lte, the long term evolution of the 3g services, eyes are now turning towards the next development, that of the truly 4g technology named imt advanced.
First generation second generation worlds first integrated lte3g modem with cat4 and carrier aggregation supports all 7 global standards lte fdd, lte tdd, umts, evdo, cdma 1x, tdscdma, gsmedge 6 modes supported. Aug 05, 2014 this tutorial describes the specific details of the lte mac layer or the medium access control protocol. Pdf performance analysis of lteadvanced physical layer. Performance analysis of lteadvanced physical layer. Arpu, then acquisition of, or merger with, a competitor is the natural choice. Lte advanced lte standardization has come to a mature state by now where changes on the specification are limited to corrections and bug fixes. Sprints galaxy s20 ultra prepares subscribers for new tmobile the big news about the samsung s20 ultra for sprint is that its thoroughly merger proof. Lte mac layer presentation lte long term evolution medium.
Also, it should be noted that mac protocol is available for both user plane and also for the control plane. Huawei lte for rail technical white paper page 5 deployed a tdd 1. This paper discusses smart algorithms in the device needed for further improving data traffic management and network selection based on the principles described above. A mechanism to allow seamless handovers between 3glte and wifi together, these three components make up the framework for qualcomms connectivity engine cne. This layer is the same as the best server layer, except that for sectors with repeaters, the repeater and its donor are treated as one combined sector. Lmr and lte are very different technologies and require different tools for testing and maintenance. The link layer corresponds to the osi data link layer and may include similar functions as the physical layer, as well as some protocols of the osis network layer. Lte physical layer fundamentals and test requirements. Camel customised applications for mobile network enhanced logic is a set of in intelligent network type functions and procedures that make operatorspecific in services available to. On the physical layer layer one, lte can be the target of jamming attacks that aim to deny the service 5 8. Lte protocol stack layers lets have a close look at all the layers available in eutran protocol stack which we have seen in previous chapter. Sprints galaxy s20 ultra prepares subscribers for new t. Lte mac layer free download as powerpoint presentation. Lte control plane layer covers upper layers,nas,rrc,phy and rf.
Control mac layer deals with transmission errors without the need to engage the arq. As previously discussed, it is more than likely that lte and lmr systems will coexist for quite a while. Lte tutorial lte stands for long term evolution and it was started as a project in 2004 by telecommunication body known as the third generation partnership project 3gpp. This tutorial describes the specific details of the lte mac layer or the medium access control protocol. Physical layer for eutran, physical resource in lte pg. Telecommunications engineering under the supervision of professor hamid. The rlc layer is present on top of the medium access control mac layer and beneath other higher layers such as rrc radio resource control and pdcp packet data convergence protocol in the lte protocol stack. If the operators focus is on increasing operational efficiency and reducing tco for new technology and network expansion then network sharing, in particular ran radio access network sharing, is a strong alternative. In the physical layer of lte 9, 10, the checksum technology is. Type 1 uses frequency division duplexing uplink and downlink separated by frequency, and tdd uses time division duplexing uplink and downlink separated in time. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. A comprehensive analysis of lte physical layer by fahimeh rezaei a thesis presented to the faculty of the graduate college at the university of nebraska in partial fulfillment of requirements for the degree of master of science major. A udp framing format for maclte has been defined described in packetmaclte.
Key concepts telecommunication design systems engineering realtime and embedded systems authentication the lte network verifies the ues identity by challenging the ut use the keys and report a result. Pdf lteadvanced ltea is the project name of the evolved version of lte that is being developed by 3gpp. The physical layer itself maintains the continuous connection model, especially on the downlink, where there is continuous transmission. The design of the lte physical layer phy is heavily influenced by the. Pdf this paper proposes a semianalytical medium access control mac layer model for the macroscopic analysis of long term evolution lte uplink find, read and. Lte is definitely going to be used in the public safetycritical communications world. Maci message authentication code integrity it is a special field added by the packet data convergence protocol pdcp layer to each rrc message for the purpose of integrity protection.
The lte demodulator has since been enhanced to support the lte release 9 which added transmission mode 8dual layer beamforming i. Pdf merger mac merge pdf files on mac os x download. Mac is a radio network protocol which resides both in the ue and in the eutran. Long term evolution protocol overview nxp semiconductors. Lte layer 2 user plane protocol stack in detail teletopix. Lte mac scheduling dynamic scheduling suitable for bursty traffic. Rlc acts as an interface between pdcp and mac layers and provides services to both. Lte is designed to combine performance goals such as high transmission. Lte network architecture lte network architecture is a generally simplified access network which marks a total departure from previous standards, characterized by the absence of a circuitswitched domain. In case of long term evolution lte, the scheduler in the medium access control mac layer of the enodeb allocates the available radio resources among different ues in a cell through proper handling. The lte network architecture incorporates new network elements. In case of dispute, the reference shall be the printing on etsi printers of the pdf version kept on a. Physical layer aspects of 3gpp s long term evolution lte fahad shamshad, usman javed. Pdf a semianalytical macroscopic mac layer model for lte uplink.
In case of dispute, the reference shall be the printing on etsi printers of the pdf version kept on. This paper provides an overview of the radio interface physical layer requirements. These comparisons are based on the original seven layer protocol model as defined in iso 7498, rather than refinements in the internal organization of the network layer. Pdf analysis of maclevel throughput in lte systems with. Software implementation and performance analysis of the lte. If you continue browsing the site, you agree to the use of cookies on this website. I will suggest to go and compare the lte protocol stack with osi model and then pick and choose one layer e. Lte user plane layer consists of upper layers,nas,pdcp,rlc,mac,phy and rf. Since it coexists in the lte spectrum, nbiot follows the legacy lte. Lte physical layer fundamentals and test requirements fanny mlinarsky octoscope. To ensure reliability, the network uses a double radio layer and redundant control nodes.
Jun 05, 2017 get an overview of the lte mac layer from this presentation lte mac layer presentation is published by eventhelix in lte long term evolution. There are two types of frame structure in the lte standard, type 1 and type 2. Lte3g modem chips 2010 worlds first mobile platform 8960 with integrated lte3g multimode source. Pdcp, rlc, mac layers together make up lte layer 2. This page on lte protocol stack describes user plane and control plane protocol stack layers in lte. The network checks the result against the expected result integrity signaling message. Lte provides a packet switched model at the sap, but retains a circuit switched model at the phy. May 28, 2011 the 3gpp lte medium access controlmac layer is covered here. Sep 18, 20 lte user layer 2 protocol stackthe plan is composed of three substrates, as shown in the figure packet layer packet data convergence protocol pdcp.
This protocol is layer 2 of the lte air interface connecting an lte ue with an enodeb. As a matter of fact, the previous research efforts focused only on layer one or layer three protocols andto the best of our knowledgeno security analysis of data link layer layer two protocols exists to. Performance study for harqarq interaction of lte chuang. It employs a nonhierarchical distributed structure. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. To this end, the group of supporting companies listed on the title page conducted a thorough link layer simulation analysis to evaluate the actual coverage performance of 3gpps lpwa ltem technology. This layer displays the technology cellular layer e. Design and development of medium access control scheduler in. An uplink packet is then described, highlighting any differences. Lte medium access layer lte mac layer presentation 2. Dimensioning of lte network description of models and tool, coverage and capacity estimation of 3gpp long term evolution radio interface abdul basit, syed masters thesis submitted in partial fulfillment of the requirements for the degree of masters of science in technology espoo, february, 2009.
I would be almost impossible to explain everything about lte mac in a single column without making it a thick book or without making everybody falling in sleep since mac is the center of all lte procedure. Lte advanced xpert multi layer analysis for lte advanced access networks complete realtime analysis of lte advanced what do you really know about your radio access network ran and the interaction between the user equipment ues and the serving cells enodeb. The downlink direction from network to terminal is covered first. As others have mentioned its a big topic to go after lte stack protocol development. Pdf merger mac is a mac os x application that let you merge several pdf documents into one single pdf file.
1387 164 1103 1432 1418 73 626 260 648 733 1024 555 1317 1681 570 686 2 843 413 424 83 1194 1556 1399 906 1591 1326 539 857 578 1105 1508 1525 472 119 1643 829 990 276 675 142 658 1048 1114 727 1278 153 478 1486