Furthermore, at the mac layer, access and scheduling protocols demand reliable control information, which is often protected from errors using. 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. How to verify your lte protocol and rf interactions. Lte provides downlink peak rates of at least 100mbits, 50 mbits in the. The physical layer itself maintains the continuous connection model, especially on the downlink, where there is continuous transmission. Aug 25, 2009 mac is a layer 2 protocol in the umts access stratum. Lte mac layer free download as powerpoint presentation. Aug 05, 2014 this tutorial describes the specific details of the lte mac layer or the medium access control protocol. The medium access layer was made necessary by systems that share a common communications medium. Lte uses several different types of logical, transport and physical channel, which are distinguished by the kind of information they carry and by the way in which the information is processed.
The goals for lte include improving spectral efficiency, lowering costs, improving services, making use of new spectrum and reformed spectrum opportunities, and better integration with other open standards. Systems beyond imt2000 imtadvanced is set to introduce evolutionary path beyond 3g. Physical data channels between different levels of the physical layer. Analysis of maclevel throughput in lte systems with link. Constructive coexistence between unlicensed lte with wlan relies on proper medium access control mac layer channel access coordination between the heterogeneous systems. The mac layer is responsible for mapping the transport channels onto logical channels and transmitting the data up to the rlc layer, and thereverse receiving data on logical channels from the rlc layer and mapping that data onto transport channels for the physical layer. If you continue browsing the site, you agree to the use of cookies on this website. Oct 02, 2018 hindi me logical to transport layer channel mapping and functions of rlc and mac layer pdf link. 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. This protocol is layer 2 of the lte air interface connecting an lte ue with an enodeb. A udp framing format for maclte has been defined described in packetmaclte. Mobile class targets 100 mbps with high mobility and nomadic local area class targets 1 gbpswith low.
Physical layer layer 1 physical layer carries all information from the mac transport channels over the air interface. Etsi ts 1 evolved universal t medium access co 3gpp ts 36. Lte downlink is studied in 9, but only through simulations. Lte is the latest generation of the 3gpp standards. The objective of this masters thesis is to research how lte pdcprlcmac layers throughput counters can be automatically verified in simulated capacity tests. This work shares the same view with many scholars about the necessity of developing aibased solutions for network management tasks 11. Maclayer coexistence analysis of lte and wlan systems. Lte eutran and its access side protocols radisys white paper 2 eutran the eutran consists of enodebs enb which provide eutra user plane pdcprlc mac phy and control plane rrc protocol terminations toward the user equipment ue. The control plane includes the radio resource control layer rrc which is responsible for configuring the lower layers. Pdf mac layer performance of different channel estimation. Lte radio layer 2, rrc and radio access network architecture. The media access control mac data communication networks protocol sublayer, also known as the medium access control, is a sublayer of the data link layer specified in the sevenlayer osi model.
The enbs are interconnected with each other by means of the x2 interface. Also, it should be noted that mac protocol is available for both user plane and also for the control plane. As it is evident from the name itself that for the data link layer, the mac layer serves the purpose of managing the media access to. An important ai tool gaining a lot of attention is the deep reinforcement learning drl.
Medium access control mac radio protocols for lte and lte. Hindi me logical to transport layer channel mapping and functions of rlc and mac layer pdf link. 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. 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. Enhanced intercell interference control icic for noncarrier aggregation ca based deployments of heterogeneous networks for lte r1, r2, r3, r4 false. Lte measurements lte l2l3macrrc standards ts 36300. The figure1 depicts 5g protocol stack consisting of both user plane and control plane protocol layers. If you understand the full details of all these procedures, i think you can say you understand at least 60% of the whole lte.
This paper presents a deep study of medium access control mac layer protocols that are used in iot with a detailed description of such protocols grouped by short and long distance coverage. Myung 2 beyond 3g international mobile telecommunications imt2000 introduced global standard for 3g. Labview based softwaredefined physicalmac layer architecture for prototyping dense lte networks rohit gupta rohit. Mac is a layer 2 protocol in the umts access stratum. This tutorial describes the specific details of the lte mac layer or the medium access control protocol. Long term evolution protocol overview nxp semiconductors. In lte, starting from the phy over all the upper layers, large overhead is required to facilitate access, reliable transmission, authentication, security, etc. Pdf on mar 12, 2018, hassan alkhateeb and others published lte mac, rlc, and pdcp. The mac protocol in cellular networks is designed to maximize the utilization of the expensive licensed spectrum. Lte uu eutran mme s11 serving s5 gateway pdn gateway. The overall pdcprlcmac architecture for downlink and uplink is shown in figs.
The 5g layer 3 is rrc layer as shown in 5g protocol stack. Pdf a semianalytical macroscopic mac layer model for. In terms of functionality, mac layer is the most complicated and the busiest layer. The main services and functions of the mac sublayer include. Figure 4 depicts the access side protocol suite consisting of rrc, pdcp, rlc, mac, and phy layers. Mac is a radio network protocol which resides both in the ue and in the eutran. The service rate depends on the number and sinr of associated users bs load, and also on the centralized scheduler e.
On the user plane, packets in the core network epc are encapsulated in a specific epc protocol and tunneled between the pgw and the enodeb. The 5g layer3 is rrc layer as shown in 5g protocol stack. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Lte provides a packet switched model at the sap, but retains a circuit switched model at the phy. Takes care of the link adaptation amc, power control, cell search for initial synchronization and handover purposes and other measurements inside the lte system and between systems for the rrc layer. Mac has the input as logical channels and at the output it has transport channels. Lte layer 2 user plane protocol stack in detail teletopix. Mapping between logical channels and transport channels.
The following sections are covered mac architecture ue side mac architecture utran side. The 3gpp lte medium access controlmac layer is covered here. Lte eutran and its access side protocols radisys white paper 2 eutran the eutran consists of enodebs enb which provide eutra user plane pdcprlcmacphy and control plane rrc protocol terminations toward the user equipment ue. In this context pdcp packet data convergence protocolrlc radio link control mac medium access control layer means the layer that is above the physical layer, and. Medium access control mac layer basically provides the radio resource allocation service and the data transfer service to the upper layer. What is maccontentionresolutiontimer what is the start and end activit. Tpcpucchrnti physical layer uplink power control na na. Data is sent from the physical layer to the mac layer in the form of transport channels. Summary medium access control mac layer basically provides the radio resource allocation service and the data transfer service to the upper. 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 cite all the research you. Packet layer packet data convergence protocol pdcp. 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. Cellular networks, such as gsm, umts or lte networks, also use a mac layer. Lte layer 2 user plane protocol stack in detail lte user layer 2 protocol stackthe plan is composed of three substrates, as shown in the figure.
As part of the data transfer service, the mac layer performs procedures such as scheduling requests, buffer status reporting, random access, and hybrid automatic repeat request harq. The air interface of a cellular network is at layers 1 and 2 of the osi model. Medium access control mac protocol specification 3gpp ts 36. We also introduce the system model and notation, and we. In case of dispute, the reference shall be the printing on etsi printers of the pdf version kept on a. Comparison of longterm evolution lte and wlan architectures comparison how the mac sees the baseband physical layer phy frames and packets a timeline overview life of a packet a protocol overview lte protocol operation management and control functions scheduling and qos handover and roaming power save functions.
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