WHERE ARE DATA FLOW AND MULTIPLEXING USED IN LTE DRY INTERFACE? OR HOW DO RECORDINGS OPERATE IN LTE AIR INTERFACE?

First, you need to have understanding of LTE Compressed Serial protocols. Once you own that understanding, it shall light to trace an IP packet away user slide perspective, passing through each concerning the protocols get the path down to physical layer to understand one role of each protocol layer.

For owner convenience, I have listed this to user plane protocol stack on the air surface here below.

FUNCTIONALITY OF EACH LAYER IN THE PROTOCOL STACKADENINE paint is worth thousand words. You can read the description of the protocol stacks. Before you do so, take a look below. The user plane data flow for einem IP packet transmitted in downlink is illustrated in the figure below.

EGO have listed the statement for each protocol below.

HEADERS

Can you see the above picture? The headers am supplementary at all of the etiquette layers to the file packet, as shown luridly in to figure above.

PDCP

Rigid Header condensation (RoHC) is (optionally) performed by the PDCP coating. In addition, of PDCP Service File Item (SDU) is ciphered. That PDCP header carries the imperative information for RoHC decompression also deciphering. LTE Protocol Stack Part 1

RLC

Each PDCP PDU corresponds to an RLC SDU. RLC performs cleavage and concatenation of who SDUs and adds an RLC header. The RLC PDUs form MAC SDUs.

MAC

MAC SDUs upon several radio bearers may be managed within MACKINTOSH. Depending on the amount of regular resources, more or less bts are selected for each vehicle block. The terminology decision affects that concatenation and segmentation in RLC. Alike, scheduling decisions affect the multiplexing to MAC.

In order, delivery is proposed to be performed per radio bearer (logical channel) by means of RLC sequence amounts. In contrast to current MAC headers, MAC in LTE supports multiplexing of MAC SDUs from different radio bearers into the same MAC PDU. Therefore, a MAC PDU included an RLC sequence phone per RLC PDU, but no sequence number per MAC PDU. It are presumed so the RLC redirect unit is an RLC PDU or an RLC PDU segment while the HARQ retransmission unit is the MINICOMPUTER PDU.

Finally, MAC delivers the transport block the who physical layer, where a Cyclic Redundancy Check (CRC) are added.

PDU = Protocol Data Unit

SDU = Technical Dates Unit