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 NR system?
5G New Radio (NR) is the global standard for a unified, more capable 5G wireless air interface . It will deliver significantly faster and more responsive mobile broadband experiences, and extend mobile technology to connect and redefine a multitude of new industries.
Read moreWhat is NR in network mode?
5G NR (New Radio ) is a new radio access technology (RAT) developed by 3GPP for the 5G (fifth generation) mobile network. It was designed to be the global standard for the air interface of 5G networks.
Read moreWhat is layer in massive MIMO?
In multi-user MIMO (MU-MIMO), which is shown in the bottom right quadrant of Figure 1, the AAS simultaneously sends different layers in separate beams to different users using the same time and frequency resource , thereby increasing the network capacity.
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