As defined by 3GPP, LTE Layer 2 structure consists of PDCP/RLC/MAC layers . Transport channels are located between the physical layer and MAC layer. MAC multiplexes RLC links and manages scheduling and priority handling via logical channels. The diagrams below show the structure for the downlink and uplink of Layer 2.
Read moreWhat is layer mapping?
(2) Layer Mapping : This is the process where each codeword is mapped to mapped to one or multiple layers . Refer to Layer Mapping page. (3) Precoding : This is process where the layer data are allocated to multiple antenna ports (logical antenna ports in this stage).
Read moreWhat are layers in MIMO?
Single-user MIMO (SU-MIMO) is the ability to transmit one or multiple data streams , called layers, from one transmitting array to a single user. SU-MIMO can thereby increase the throughput for that user and increase the capacity of the network.
Read moreWhat is Layer 3 in 5G?
5G-NR Layer 3 (RRC) Functions: Establishment, maintenance, and release of an RRC connection between the UE and NG-RAN including Addition, modification, and release of carrier aggregation, Addition, modification, and release of Dual Connectivity in NR or between E-UTRA and NR.
Read moreWhat is 5G physical layer?
PHY layer sits at the bottom of the 5G NR protocol stack, interfacing to MAC sublayer higher up via transport channels . It provides its services to MAC and is configured by RRC . PHY supports downlink ( gNB -to- UE ), uplink ( UE -to- gNB ) and sidelink ( UE -to- UE ) communications.5 Nis 2021
Read moreWhat is physical layer in LTE?
LTE Physical layer eNodeB Transmitter eNodeB Physical layer consists of Channel coding,rate matching, scrambler, mapper, layer mapping, pre-coding, resource element mapper, ofdm module . CRC is appended to the data from MAC layer before being passed through the PHY layer.
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