This paper provides an overview of the mac for 3gpp long term evolution. Real world conditions affecting lteltea device performance channel and network factors that impact mobile device performance multipath link loss fading conditions doppler speed degree of spatial diversity noise and interference conditions transmission mode used influence of retransmissions and adaptive modulation and coding. You will see that overall structure is same except that sn length in nr is much larger than lte srb pdcp. Header compression and decompression of ip data flows using the rohc protocol transfer of data. Rel8 dec 2008 lte work item ofdma air interface sae work item new ip core network umts femtocells, dual carrier hsdpa rel9 dec 2009 multistandard radio msr, dual carrier hsupa, dual band hsdpa, son, lte femtocells henb lteadvanced feasibility study, mbsfn rel10 march 2011 lteadvanced 4g work item, comp study four carrier hsdpa. In terms of basic operation, what pdcp does seems very simple. Pdcp is located in the radio protocol stack in the umtslte5g air interface on top of the rlc layer. The pdcp sublayer is used for rbs mapped on dcch and dtch type of logical channels. Mobile class targets 100 mbps with high mobility and nomadic local area class targets 1 gbpswith low. Mac layer, in turn, offers services to the rlc layer by means of logical chan nels. Deciphering of eea2 aes messages is supported where wireshark is built with. Packet data convergence protocol pdcp in pdcp, specification, lte. A udp framing format for pdcp lte has been defined described in packet pdcp lte. Every pdcp entity uses at most one rohc compressor instance and at most one rohc decompressor instance.
Pdcp layer architecture varies the user plane and control plane, as shown in the below 2 figures. Jul 26, 2019 3gpp ts 24301 pdf july 26, 2019 posted by admin 3gpp ts click spec number to see fileserver directory for this spec work item which gave rise to this spec. Rel8 lte 3g long term evolution evolved packet system ran part. Pdcp data pdus are used for data plane both the control and the user. Aug 26, 20 the lte network is an allip network, and provides its users with alwayson ip connectivity. The pdcp is located in the radio protocol stack in the umts lte 5g air 3gpp ts packet data convergence protocol pdcp specification.
Reference architecture eutran architecture epc components, functions and interfaces mme sgw pdngw support information acronyms standards references lte, eps, eutran and epc 3gpp lte long term evolution, an evolution of gsmumts, specifies the next generation 3gpp mobile broadband network the mobile broadband network is called evolved. How discard of data packets during lte call conversation. Following two data structure is a kind of pdcp layer control packet. The term 3gpp specification covers all gsm including gprs and edge, wcdma including hspa, lte including lte advanced and lte advanced pro and 5g specifications. This means, once a ue connects to a pdn using the ip address assigned at its initial attach to the network, the ip connection remains connected after a default eps bearer is established over the lte network and until the ue detaches from the lte network.
This means, once a ue connects to a pdn using the ip address assigned at its initial. Header decompression entity generates two types of packets. A udp framing format for pdcplte has been defined described in packetpdcplte. The main services and functions of the pdcp sublayer for the user plane include. Irat ho srvcc, csfb, cco, and rwr, measgap, x2ho, harq, tti bundling, drx, qos, carrier aggregation, icic, eicic. Stage 1 requirements frozen 5g requirements approved march 2016 include specialization via network slicing, diverse mobility management, expanded qos and policy control, exposure of. This page provides guidance as to how to find the specifications you are seeking. Packet data convergence protocol pdcp specification.
Myung 2 beyond 3g international mobile telecommunications imt2000 introduced global standard for 3g. Long term evolution lte is the next step forward in cellular 3g services. Lte nas,rrc,mac, pdcp and rlc at radio interface telco. Ip layer submits pdcp sdus ip packets to the pdcp layer. Lte technology is a based on a 3gpp standard that provides for a downlink speed of up to 150 megabits per second mbps and an uplink speed of up to 50 mbps. In this version of the specification, only the robust header compression protocol rohc, is supported. In case of dispute, the reference shall be the printing on etsi printers of the pdf version kept on. The lte link layer protocols are optimized for low delay and low overhead and are simpler than their. Lte enodeb s1 startup, mibsib broadcast and rrc connection learn about enodeb startup. Agenda page ltea carrier aggregation serving the exploding demands of mobile data data throughput characterization a standards view phymac layer throughput pdcp layer throughput endtoend.
Functions and architecture of pdcp in lte teletopix. Average pdcp layer cell throughput ul lte290a minimum pdcp. Jun 14, 2019 pdcp is an abbreviation for packet data convergence protocol. While initial specifications enabled nonstandalone 5g radio systems integrated in previousgeneration lte networks, the scope of release 15 expands to cover standalone 5g, with a new radio system complemented by a nextgeneration core network. The rationale will be prepared in a special work item currently being drafted by vodafone. Most of the lte pdcp pdu you woud see would be the data pdu. Average pdcp layer cell throughput ul lte290a minimum pdcp throughput dl from cs 103 at miami dade college, miami. Prasad nec corporation niksun wwsmc, 26 july, 2011, princeton, nj, usa mim110043 disclaimer. Aug 14, 20 lte mac, rlc, and pdcp may 2012 bong youl brian cho. The lectures also cover channel mapping and ue categories. All the feature of lte where you will explore lte in yourself. Provides a unique focus on radio protocols for lte and lteadvanced ltea giving readers a valuable understanding of lte radio protocols, this book covers lte longterm evolution layer 23 radio protocols as well as new features including lteadvanced.
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. Sae system architecture evolution is the corresponding evolution of the gprs3g packet core network evolution. Two different types of pdu pdcp are defined in lte. How discard of data packets during lte call conversation typically, the data rate available at the radio interface is lower than the data rate available on the network interfaces. Umts long term evolution lte technology introduction. Packet data convergence protocol pdcp is specified by 3gpp in ts 25. Jul 04, 2016 irat ho srvcc, csfb, cco, and rwr, measgap, x2ho, harq, tti bundling, drx, qos, carrier aggregation, icic, eicic.
It can decode the pdcp lte headers but has limited support for rohc payloads. Pdcp is located in the radio protocol stack in the. Liteon, alldatasheet, datasheet, datasheet search site for. While initial specifications enabled nonstandalone 5g radio systems integrated in previousgeneration lte networks, the scope of release 15 expands to cover standalone 5g, with a new radio system. Service access point sap offered by the pdcp entity to the rrc entity see 3gpp 36. Pdcp is an abbreviation for packet data convergence protocol. This is followed by lectures that cover lte frequency bands, ofdm, ofdma, scfdma and lte signaling. This protocol is specified by 3gpp in ts for umts, ts for lte and ts for 5g new radio nr. From theory to practice provides the reader with a comprehensive systemlevel understanding of lte, built on explanations of the theories which underlie it. Pdcp stands for packet data convergence protocol 3gpp. Revised versions of many of these specifications are produced up to four times a year following the quarterly tsg plenary meetings.
Which provides a tremendous savings in the amount of header that would otherwise have to go over the air. Pdcp layer submits pdcp pdus rlc sdus to rlc layer. Just adding the pdcp header to the incoming data and forward to rlc in downlink, or removing the pdcp header from the incoming packet and forward it to ip layer in case of uplink is all that it does. It also embraces enhancements to lte and, implicitly, the evolved packet core epc. There is a misconception among some of the industry followers that lte systems. Thus, when a certain rate data service is higher than the data rate of the lte radio interface, this leads to buffering in the ue and the enodeb. The pdcp sublayer is configured by upper layers ts 38. Lte tdd which is also referred to as tdlte provides the long term evolution path.
Reference architecture eutran architecture epc components, functions and interfaces mme sgw pdngw support information acronyms. The lte network is an allip network, and provides its users with alwayson ip connectivity. Pdcp data pdu format for srbs following shows the comparision between nr srb pdcp and lte srb pdcp data structure. Pdcp packet data convergence protocol 3gpp acronymfinder. Lte includes an fdd frequency division duplex mode of operation and a tdd time division duplex mode of operation. Lte evolved universal terrestrial radio access e utra packet data convergence protocol pdcp specification. How is packet data convergence protocol 3gpp abbreviated. You will see that overall structure is same except. Rel8 dec 2008 lte work item ofdma air interface sae work item new ip core network umts femtocells, dual carrier hsdpa rel9 dec 2009 multistandard radio msr, dual carrier hsupa, dual. Pdcp is defined as packet data convergence protocol 3gpp frequently. The pdcp is located in the radio protocol stack in the umts lte 5g air interface on top of the rlc layer. However, you may see the pdcp packet with dc field 0 i. Each pdcp entity is carrying the data of one radio bearer.
Lte performance kpis igor pais lte ue state measurement m80 measures ue state management related measurements. Lte mac, rlc, and pdcp may 2012 bong youl brian cho. Following shows the comparision between nr srb pdcp and lte srb pdcp data structure. Selected to specific onlive intensity and radiant intensity ranges, lte302 datasheet, lte302 circuit, lte302 data sheet. Pdcp removes ip header minimum 20 bytes from pdu, and adds token of 14 bytes. Technical specification ts initial planned release. Pdcp provides its services to the rrc and user plane upper layers. Each one of the main functions is explained in the following subsections. If you continue browsing the site, you agree to the use of cookies on this website. Insequence delivery of upper layer pdus at pdcp reestablishment procedure for rlc am. Systems beyond imt2000 imtadvanced is set to introduce evolutionary path beyond 3g. If you are looking the official versions as published by the 3gpp partners, see the official publications page.