Long term evolution lte is the next step forward in cellular 3g services. Myung 2 beyond 3g international mobile telecommunications imt2000 introduced global standard for 3g. The rationale will be prepared in a special work item currently being drafted by vodafone. Lte evolved universal terrestrial radio access e utra packet data convergence protocol pdcp specification. Pdcp stands for packet data convergence protocol 3gpp. How discard of data packets during lte call conversation. Each one of the main functions is explained in the following subsections. 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. 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. However, you may see the pdcp packet with dc field 0 i.
Mobile class targets 100 mbps with high mobility and nomadic local area class targets 1 gbpswith low. 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. Prasad nec corporation niksun wwsmc, 26 july, 2011, princeton, nj, usa mim110043 disclaimer. Every pdcp entity uses at most one rohc compressor instance and at most one rohc decompressor instance. Mac layer, in turn, offers services to the rlc layer by means of logical chan nels. Pdcp layer submits pdcp pdus rlc sdus to rlc layer. 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. Two different types of pdu pdcp are defined in lte. Packet data convergence protocol pdcp in pdcp, specification, lte. If you are looking the official versions as published by the 3gpp partners, see the official publications page. Selected to specific onlive intensity and radiant intensity ranges, lte302 datasheet, lte302 circuit, lte302 data sheet.
Lte nas,rrc,mac, pdcp and rlc at radio interface telco. In terms of basic operation, what pdcp does seems very simple. Packet data convergence protocol pdcp is specified by 3gpp in ts 25. Following two data structure is a kind of pdcp layer control packet. Each pdcp entity is carrying the data of one radio bearer. Lte mac, rlc, and pdcp may 2012 bong youl brian cho.
Ip layer submits pdcp sdus ip packets to the pdcp layer. The pdcp is located in the radio protocol stack in the umts lte 5g air 3gpp ts packet data convergence protocol pdcp specification. Pdcp removes ip header minimum 20 bytes from pdu, and adds token of 14 bytes. Pdcp data pdus are used for data plane both the control and the user. Pdcp layer does header compression and adds pdcp header to these pdcp sdus. Average pdcp layer cell throughput ul lte290a minimum pdcp. Long term evolution protocol overview nxp semiconductors.
Jun 14, 2019 pdcp is an abbreviation for packet data convergence protocol. Irat ho srvcc, csfb, cco, and rwr, measgap, x2ho, harq, tti bundling, drx, qos, carrier aggregation, icic, eicic. Pdcp is an abbreviation for packet data convergence protocol. A udp framing format for pdcplte has been defined described in packetpdcplte. Systems beyond imt2000 imtadvanced is set to introduce evolutionary path beyond 3g. 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. 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. Pdcp data pdu format for srbs following shows the comparision between nr srb pdcp and lte srb pdcp data structure. 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. This means, once a ue connects to a pdn using the ip address assigned at its initial. You will see that overall structure is same except that sn length in nr is much larger than lte srb pdcp. Technical specification ts initial planned release. The pdcp sublayer is used for rbs mapped on dcch and dtch type of logical channels. It also embraces enhancements to lte and, implicitly, the evolved packet core epc.
Liteon, alldatasheet, datasheet, datasheet search site for. 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. Most of the lte pdcp pdu you woud see would be the data pdu. 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. How is packet data convergence protocol 3gpp abbreviated. Header decompression entity generates two types of packets. If you continue browsing the site, you agree to the use of cookies on this website. All 3gpp specifications are publicly available on the 3gpp server. Pdcp is defined as packet data convergence protocol 3gpp frequently. This paper provides an overview of the mac for 3gpp long term evolution. Rel8 lte 3g long term evolution evolved packet system ran part. Sae system architecture evolution is the corresponding evolution of the gprs3g packet core network evolution. Umts long term evolution lte technology introduction. Pdcp packet data convergence protocol 3gpp acronymfinder.
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. Aug 26, 20 the lte network is an allip network, and provides its users with alwayson ip connectivity. In this version of the specification, only the robust header compression protocol rohc, is supported. 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. Jul 04, 2016 irat ho srvcc, csfb, cco, and rwr, measgap, x2ho, harq, tti bundling, drx, qos, carrier aggregation, icic, eicic. Lte enodeb s1 startup, mibsib broadcast and rrc connection learn about enodeb startup. Pdcp layer architecture varies the user plane and control plane, as shown in the below 2 figures. Pdcp provides its services to the rrc and user plane upper layers.
A udp framing format for pdcp lte has been defined described in packet pdcp lte. 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. Lte includes an fdd frequency division duplex mode of operation and a tdd time division duplex mode of operation. The main services and functions of the pdcp sublayer for the user plane include. Revised versions of many of these specifications are produced up to four times a year following the quarterly tsg plenary meetings.
Pdcp is a layer sitting at the top most part of the radio stack. Stage 1 requirements frozen 5g requirements approved march 2016 include specialization via network slicing, diverse mobility management, expanded qos and policy control, exposure of. Aug 14, 20 lte mac, rlc, and pdcp may 2012 bong youl brian cho. 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. You will see that overall structure is same except. From theory to practice provides the reader with a comprehensive systemlevel understanding of lte, built on explanations of the theories which underlie it. It can decode the pdcp lte headers but has limited support for rohc payloads.
The pdcp is located in the radio protocol stack in the umts lte 5g air interface on top of the rlc layer. 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. 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. Following shows the comparision between nr srb pdcp and lte srb pdcp data structure. In case of dispute, the reference shall be the printing on etsi printers of the pdf version kept on. The term lte is typically used to represent both lte and sae. Which provides a tremendous savings in the amount of header that would otherwise have to go over the air. This is followed by lectures that cover lte frequency bands, ofdm, ofdma, scfdma and lte signaling. The lectures also cover channel mapping and ue categories.
The pdcp sublayer is configured by upper layers ts 38. Packet data convergence protocol pdcp specification. Pdcp is located in the radio protocol stack in the. Header compression and decompression of ip data flows using the rohc protocol transfer of data. All the feature of lte where you will explore lte in yourself. The lte network is an allip network, and provides its users with alwayson ip connectivity.
Average pdcp layer cell throughput ul lte290a minimum pdcp throughput dl from cs 103 at miami dade college, miami. The lte link layer protocols are optimized for low delay and low overhead and are simpler than their. 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. Lte overview lte telecommunication mobile technology. Lte tdd which is also referred to as tdlte provides the long term evolution path. Functions and architecture of pdcp in lte teletopix.
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