Pdcpc cuup pdcpu du lte rlc mac phyu du nr rlc mac phyu ru e2 phyl ru phyl ru phyl fronthaul disaggregated core network upf ngu sdap ran intelligent controllernear rt 3rd party xapp radio connection mgmt mobility mgmt qos mgmt interference mlai analytics model radio network information base design inventory policy. Msc for the lte data path in uplink and downlink showing packet ow from l3 through l2 and. There is a misconception among some of the industry followers that lte systems configured to operate in unpaired lte tdd or paired lte fdd spec. Myung 2 beyond 3g international mobile telecommunications imt2000 introduced global standard for 3g. Technical specification ts initial planned release. You will see that overall structure is same except that sn length in nr is much larger than lte srb pdcp.
Lte release 9 technology introduction white paper the lte technology as specified within 3gpp release 8 was first commercially deployed by end 2009. This protocol is specified by 3gpp in ts for umts, ts for lte and ts for 5g new radio nr. 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. Irat ho srvcc, csfb, cco, and rwr, measgap, x2ho, harq, tti bundling, drx, qos, carrier aggregation, icic, eicic. However, in 5g nr, the rlc will just pass the pdu received from the pdcp to. Lte has become the fastest developing mobile system technology. It was 3gpp release 8 when lte was introduced for the very first time. Following two data structure is a kind of pdcp layer control packet. It is used to carry dci downlink control information. Packet data convergence protocol pdcp specification. Lte is a trade mark of etsi currently being registered. Lte message editor is a highly flexible tool for configurability of layer 3 mes.
Most of the lte pdcp pdu you woud see would be the data pdu. Rel8 lte 3g long term evolution evolved packet system ran part. Applicability of radio transmission, radio reception and radio resource management test cases ts 38. Packet data convergence protocol pdcp in lte what is pdcp. All the feature of lte where you will explore lte in yourself. Deciphering of eea2 aes messages is supported where wireshark is built with. A udp framing format for pdcplte has been defined described in packetpdcplte. Pdcp reestablishment procedure for rlc am for duplicate detection of lower layer sdus.
Etsi ts 1 evolved universal t packet data converg 3gpp ts 36. Modeling lte protocol for mobile terminals using a fdt 231 fig. Long term evolution lte is the next step forward in cellular 3g services. Two different types of pdu pdcp are defined in lte. If you are looking the official versions as published by the 3gpp partners, see the official publications page. Since then the number of operators implementing the technology is strongly increasing around the globe. However, as stated in, the target for average spectrum efficiency and celledge user throughput efficiency should be given a higher priority than the target for peak spectrum efficiency and voiceoverip voip capacity. Packets received by a layer are called service data unit sdu while the packet output of a layer is referred to by protocol data unit pdu. A udp framing format for pdcp lte has been defined described in packet pdcp lte. Modeling lte protocol for mobile terminals using a formal. Pdcp data pdus are used for data plane both the control and the user. Stage 1 requirements frozen 5g requirements approved march 2016 include specialization via network slicing, diverse mobility management, expanded qos and policy control, exposure of capabilities efficiency via a common core for multiple accesses fixed, mobileterrestrial lte, ng nr and more, satellite, optimized signalling, traffic steering. The main services and functions of the pdcp sublayer for the user plane include. Assessing compliance of 5g device implementations to.
However, in 5g nr, the rlc will just pass the pdu received from the pdcp to the mac after the addition of the header information. The pdcp is located in the radio protocol stack in the umts lte 5g air interface on top of the rlc layer. Pdcp is an abbreviation for packet data convergence protocol. Overview of lte 3gpp releases release 8 lte introduced. Packet data convergence protocol pdcp in pdcp, specification, lte. This page provides guidance as to how to find the specifications you are seeking.
Therefore, the solution proposals of lteadvanced, the main ones of which are. This overview of the security aspects of 3gpp lte and sae is based on standardization as of december 2008. Following shows the comparision between nr srb pdcp and lte srb pdcp data structure. The reader is encouraged to study the most recent versions of the 3gpp specifications to gain the most.
We get the information about number of ofdma symbols used by pdcch after decoding pcfich. Systems beyond imt2000 imtadvanced is set to introduce evolutionary path beyond 3g. 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. We will also cover 5g deployment scenarios from the specs as well as some of the informative web resources. At this time the release 8 specifications are not yet fully defined. Enhancements to lte direct phymac to address latencycritical, reliable v2x communications cv2x builds upon lte direct d2d communications with enhancements to address v2x requirements applications safety and nonsafety ieee iso etsi transport message sublayer udp tcp ipv6 pdcp rlc mac phy lte direct protocol 3gpp reuse other standards. Which provides a tremendous savings in the amount of header that would otherwise have to go over the air. Besides these methodological contributions, we make the following insightful observations about lte network usage. Each one of the main functions is explained in the following subsections.
It can decode the pdcp lte headers but has limited support for rohc payloads. Pdcp removes ip header minimum 20 bytes from pdu, and adds token of 14 bytes. Create and modify scenario files for download into the pxt complete control over all settings including system, network and base station. In lte, when pdus arrive from pdcp to rlc, it is upto the rlc to concatenate them based on the requirement of the transport block and then pass the concatenated block to the mac. Pdcp data pdu format for srbs following shows the comparision between nr srb pdcp and lte srb pdcp data structure. Insequence delivery of upper layer pdus at pdcp reestablishment procedure for rlc am.
The 5g architecture consists of all rans, aggregator, ip network, nanocore etc. Packet data convergence protocol pdcp in lte what is. It can decode the pdcplte headers but has limited support for rohc payloads. Packet data convergence protocol pdcp is specified by 3gpp in ts 25. Service access point sap offered by the pdcp entity to the rrc entity see 3gpp 36. Header decompression entity generates two types of packets. From theory to practice provides the reader with a comprehensive systemlevel understanding of lte, built on explanations of the theories which underlie it. The symbols are always at the start of each subframe.
All 3gpp specifications are publicly available on the 3gpp server. However, you may see the pdcp packet with dc field 0 i. 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 throughput summary. User equipment ue radio transmission and reception. Assessing compliance of 5g device implementations to 3gpp. All the releases following only enhanced the technology. The pdcp is located in the radio protocol stack in the umts lte 5g air 3gpp ts packet data convergence protocol. Pdcp is located in the radio protocol stack in the umtslte5g air interface on top of the rlc layer pdcp provides its services to the rrc and user plane upper layers, e. This page describes lte pdcch channel or physical downlink control channel with respect to lte system. The requirements for lteadvanced were accordingly set to achieve or even enhance imtadvanced. Lte pdcch lte physical downlink control channel what. There are now no gaps representing anticipated new versions of specs.
Mobile class targets 100 mbps with high mobility and nomadic local area class targets 1 gbpswith low. In this second part of 15 mins with 5g we will start looking at the 3gpp specifications for 5g network architecture and learn how to refer the specs. For lte uplink, the existing algorithm is supposed to be implemented in the user equipment ue. The requirements for lte advanced were accordingly set to achieve or even enhance imtadvanced. Below is a logical digram of eutran protocol layers with a depiction of data flow through various layers. Pdcp layer submits pdcp pdus rlc sdus to rlc layer. Lte3gpp standard perspectivechapter 1 introduction muhannad aulama 2. This page describes 5g network architecture with its elements. The lte protocol data ow in uplink direction from ip layer through l2 to the physical layer phy. Overview long term evolution lte is the next step forward in cellular 3g services. This means that no existing spec is ever missing from the latest folder, which now contains the latest available version of each spec in each release. On the other hand, the implementation of an aqm in the ue is not mandatory. Pdcp provides its services to the rrc and user plane upper layers. Pdcp layer architecture varies the user plane and control plane, as shown in the below 2 figures.