Patent ID: 7054316
Filing Date: 2006-05-30
Classification: H04L

Abstract:
1. A method for interlayer control comprising: receiving a Service Data Unit (SDU) containing at least one Protocol Data Unit (PDU) across a channel from a first network node at a first layer of a second network node, the PDU having an associated sequence number for the PDU; determining if the sequence number is the same as a previously received sequence number from a previous PDU; determining if the previous PDU has been sent to a second layer at the second network node if the sequence number is not the same as the previously received sequence number, and storing the PDU if the previous PDU has been sent to the second layer; sending an abort message for the previous PDU to the second layer if the sequence number is not the same as the previously received sequence number and the previous PDU was not sent to the second layer; decoding the PDU if no abort was sent; determining if a Cyclic Redundancy Check (CRC) for the PDU is valid; and sending a message to the first network node, the message being an ACK message if the CRC is valid and a NAK message if the CRC is not valid.