Читать книгу Mobile Communications Systems Development - Rajib Taid - Страница 82

Consider the LTE air interface Layer 2 RLC protocol layer operating between the UE and the E‐UTRAN. The RLC layer provides services for transferring higher‐layer information in acknowledged (AM), unacknowledged (UM), or TM. To ensure an error‐free transmission and availability of the transmitted information accurately at the destination RLC protocol layer, the transmitting RLC layer performs several important functions such as segmentation, resegmentation, retransmissions, ciphering, padding, and so on. On the other hand, the receiving RLC layer also performs functions such as reassembly and duplicate detection on the received information before it is passed to the next higher layer.