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. Lte mac, rlc, and pdcp may 2012 bong youl brian cho. Mac layer, in turn, offers services to the rlc layer by means of logical chan nels. Average pdcp layer cell throughput ul lte290a minimum pdcp throughput dl from cs 103 at miami dade college, miami.
The pdcp sublayer is used for rbs mapped on dcch and dtch type of logical channels. Each one of the main functions is explained in the following subsections. Packet data convergence protocol pdcp in pdcp, specification, lte. Revised versions of many of these specifications are produced up to four times a year following the quarterly tsg plenary meetings. Average pdcp layer cell throughput ul lte290a minimum pdcp. Deciphering of eea2 aes messages is supported where wireshark is built with. 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. Pdcp data pdu format for srbs following shows the comparision between nr srb pdcp and lte srb pdcp data structure. However, you may see the pdcp packet with dc field 0 i. Pdcp is a layer sitting at the top most part of the radio stack. Pdcp layer architecture varies the user plane and control plane, as shown in the below 2 figures.
Aug 26, 20 the lte network is an allip network, and provides its users with alwayson ip connectivity. Technical specification ts initial planned release. The lectures also cover channel mapping and ue categories. This is followed by lectures that cover lte frequency bands, ofdm, ofdma, scfdma and lte signaling.
The rationale will be prepared in a special work item currently being drafted by vodafone. Pdcp layer submits pdcp pdus rlc sdus to rlc layer. 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. Jul 04, 2016 irat ho srvcc, csfb, cco, and rwr, measgap, x2ho, harq, tti bundling, drx, qos, carrier aggregation, icic, eicic. How discard of data packets during lte call conversation. Lte tdd which is also referred to as tdlte provides the long term evolution path. A udp framing format for pdcplte has been defined described in packetpdcplte. It also embraces enhancements to lte and, implicitly, the evolved packet core epc. If you are looking the official versions as published by the 3gpp partners, see the official publications page. Each pdcp entity is carrying the data of one radio bearer. This paper provides an overview of the mac for 3gpp long term evolution. How is packet data convergence protocol 3gpp abbreviated. Lte enodeb s1 startup, mibsib broadcast and rrc connection learn about enodeb startup.
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. Lte includes an fdd frequency division duplex mode of operation and a tdd time division duplex mode of operation. 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. Lte overview lte telecommunication mobile technology. Sae system architecture evolution is the corresponding evolution of the gprs3g packet core network evolution. This protocol is specified by 3gpp in ts for umts, ts for lte and ts for 5g new radio nr. Pdcp data pdus are used for data plane both the control and the user. 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. Lte performance kpis igor pais lte ue state measurement m80 measures ue state management related measurements. All 3gpp specifications are publicly available on the 3gpp server.
Irat ho srvcc, csfb, cco, and rwr, measgap, x2ho, harq, tti bundling, drx, qos, carrier aggregation, icic, eicic. Lte evolved universal terrestrial radio access e utra packet data convergence protocol pdcp specification. Pdcp is defined as packet data convergence protocol 3gpp frequently. You will see that overall structure is same except. 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. There is a misconception among some of the industry followers that lte systems. Lte nas,rrc,mac, pdcp and rlc at radio interface telco. 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. Which provides a tremendous savings in the amount of header that would otherwise have to go over the air. Selected to specific onlive intensity and radiant intensity ranges, lte302 datasheet, lte302 circuit, lte302 data sheet. 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. The pdcp is located in the radio protocol stack in the umts lte 5g air interface on top of the rlc layer. Aug 14, 20 lte mac, rlc, and pdcp may 2012 bong youl brian cho. The main services and functions of the pdcp sublayer for the user plane include.
The pdcp is located in the radio protocol stack in the umts lte 5g air 3gpp ts packet data convergence protocol pdcp specification. 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. Insequence delivery of upper layer pdus at pdcp reestablishment procedure for rlc am. In case of dispute, the reference shall be the printing on etsi printers of the pdf version kept on. Mobile class targets 100 mbps with high mobility and nomadic local area class targets 1 gbpswith low.
Umts long term evolution lte technology introduction. Pdcp removes ip header minimum 20 bytes from pdu, and adds token of 14 bytes. Reference architecture eutran architecture epc components, functions and interfaces mme sgw pdngw support information acronyms. The pdcp sublayer is configured by upper layers ts 38. 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. Pdcp is located in the radio protocol stack in the umtslte5g air interface on top of the rlc layer. Header compression and decompression of ip data flows using the rohc protocol transfer of data. 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. Myung 2 beyond 3g international mobile telecommunications imt2000 introduced global standard for 3g. Following shows the comparision between nr srb pdcp and lte srb pdcp data structure. Long term evolution protocol overview nxp semiconductors. Pdcp provides its services to the rrc and user plane upper layers.
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. Every pdcp entity uses at most one rohc compressor instance and at most one rohc decompressor instance. Pdcp stands for packet data convergence protocol 3gpp. This page provides guidance as to how to find the specifications you are seeking. Header decompression entity generates two types of packets. Prasad nec corporation niksun wwsmc, 26 july, 2011, princeton, nj, usa mim110043 disclaimer. Following two data structure is a kind of pdcp layer control packet.
In terms of basic operation, what pdcp does seems very simple. Pdcp is an abbreviation for packet data convergence protocol. It can decode the pdcp lte headers but has limited support for rohc payloads. Pdcp layer does header compression and adds pdcp header to these pdcp sdus. Long term evolution lte is the next step forward in cellular 3g services. The lte link layer protocols are optimized for low delay and low overhead and are simpler than their. Rel8 lte 3g long term evolution evolved packet system ran part.
Stage 1 requirements frozen 5g requirements approved march 2016 include specialization via network slicing, diverse mobility management, expanded qos and policy control, exposure of. Pdcp is located in the radio protocol stack in the. Functions and architecture of pdcp in lte teletopix. Pdcp packet data convergence protocol 3gpp acronymfinder. Packet data convergence protocol pdcp is specified by 3gpp in ts 25. All the feature of lte where you will explore lte in yourself. Ip layer submits pdcp sdus ip packets to the pdcp layer.
A udp framing format for pdcp lte has been defined described in packet pdcp lte. You will see that overall structure is same except that sn length in nr is much larger than lte srb pdcp. In this version of the specification, only the robust header compression protocol rohc, is supported. From theory to practice provides the reader with a comprehensive systemlevel understanding of lte, built on explanations of the theories which underlie it. Service access point sap offered by the pdcp entity to the rrc entity see 3gpp 36.
Liteon, alldatasheet, datasheet, datasheet search site for. Jun 14, 2019 pdcp is an abbreviation for packet data convergence protocol. The term lte is typically used to represent both lte and sae. The lte network is an allip network, and provides its users with alwayson ip connectivity. Packet data convergence protocol pdcp specification. 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. This means, once a ue connects to a pdn using the ip address assigned at its initial.
Two different types of pdu pdcp are defined in lte. 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. Most of the lte pdcp pdu you woud see would be the data pdu. If you continue browsing the site, you agree to the use of cookies on this website.
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