Patent ID: 8401017

Claim:
A wireless communication network comprising: a transmitter; and a receiver, wherein a radio link is established between the transmitter and the receiver to transmit and receive data units having an enhanced RLC (Radio Link Control) STATUS PDU (Protocol Data Unit) format that saves bandwidth required to transmit acknowledgment information and effectively transmits status reporting information for controlling the radio link, in which the transmitter transmits AMD (Acknowledge Mode Data) PDUs, each said AMD PDU having an SN (Sequence Number), from the transmitter to the receiver over said radio link, and the receiver responds over said radio link with a STATUS PDU to the transmitter for informing the transmitter of acknowledge information of the AMD PDUs received at the receiver, wherein the enhanced RLC STATUS PDU format includes: an ACK_SN field, for indicating the SN of a next AMD PDU which is not received and not reported as missing in the STATUS PDU; and an E 1 (Extension Bit 1 ) field, for indicating that a set of NACK_SN_Offset, E 1 , and E 2 (Extension Bit 2 ) fields does not follow when it is a first value, or indicating that the set of NACK_SN_Offset, E 1 , and E 2 fields follows when it is a second value; wherein for the set of NACK_SN_Offset, E 1 , and E 2 fields that follows the E 1 field of second value, the NACK_SN_Offset field is provided for indicating an offset to the ACK_SN of an AMD PDU that has been detected as lost at the receiver, and the E 2 field is provided for indicating that a set of SOstart (Segmentation Offset start), SOend (Segmentation Offset end), and E 2 fields does not follow for the NACK_SN_Offset when it is the first value, or indicating that a set of SOstart, SOend, and E 2 fields follows for the NACK_SN_Offset when it is the second value; wherein for the SOstart, SOend, and E 2 fields that follows the E 2 field of second value, the SOstart field is provided for indicating a position of the first byte in the portion of the AMD PDU in bytes within a data field of the AMD PDU with SN resulting from ACK_SN and NACK_SN_Offset, to which the SOStart is related, that has been detected as lost at the receiver, and the SOend field is provided for indicating a position of the last byte in the portion of the AMD PDU in bytes within a data field of the AMD PDU with SN resulting from ACK_SN and NACK_SN_Offset, to which the SOend is related, that has been detected as lost at the receiver; and wherein the offset to the ACK_SN is calculated as NACK SN_Offset =ACK_SN−SN of the AMD PDU that has been detected as lost at the receiver so that only 9 bits rather than 10 bits are needed to represent the SN of the missing AMD PDU.