US 2010/0303095 A1 · APPARATUS AND METHOD FOR GENERATING AND PARSING MAC PDU IN A MOBILE COMMUNICATION SYSTEM

Abstract

An apparatus and method for generating and parsing a MAC PDU in a mobile communication system are provided in which LCIDs of MAC SDUs to be multiplexed are checked, the length of an LF is determined for each of the MAC SDUs, referring to LF lengths predetermined for the LCIDs, a MAC header including the LCIDs and LFs of the determined lengths for the MAC SDUs is generated, and a MAC PDU is generated by attaching the MAC header to payload including the MAC SDUs. During the MAC header generation, if a padding size required for the MAC PDU generation calculated taking into account the absence of a last LF in the MAC header is larger than the length of the last LF, the last LF is included in the MAC header, the required padding size is recalculated, taking into account the inclusion of the last LF, and a padding is added according to the re-calculated padding size.

Claims22

Dependent claims

A method for parsing Media Access Control Service Data Units (MAC SDUs) in a Media Access Control Protocol Data Unit (MAC PDU) in a mobile communication system, the method comprising:

checking Logical Channel Identifiers (LCIDs) of MAC SDUs multiplexed in a received MAC PDU from a MAC header of the MAC PDU;
determining that a last Length Field (LF) related to a last MAC SDU is included in the MAC header and parsing the MAC SDUs from the MAC PDU according to LFs in the MAC header, if a length of the MAC PDU calculated using the MAC header is equal to a known Transport Block (TB) size;
and
determining that the last LF is not included in the MAC header and parsing the MAC SDUs from the MAC PDU according to LFs in the MAC header and the absent last LF, if the length of the MAC PDU is different from the TB size.

1 more element

An apparatus for parsing Media Access Control Service Data Units (MAC SDUs) in a Media Access Control Protocol Data Unit (MAC PDU) in a mobile communication system, the apparatus comprising:

a header detector for checking Logical Channel Identifiers (LCIDs) of MAC SDUs multiplexed in a received MAC PDU from a MAC header of the MAC PDU and providing sizes of the multiplexed SDUs using Length Field (LF) lengths predetermined for the LCIDs to an SDU detector;
and
the SDU detector for determining that a last LF related to a last MAC SDU is included in the MAC header and parsing the MAC SDUs from the MAC PDU according to LFs in the MAC header, if a length of the MAC PDU calculated using the LCIDs and the MAC SDU sizes is equal to a known Transport Block (TB) size, and determining that the last LF is not included in the MAC header and parsing the MAC SDUs from the MAC PDU according to LFs in the MAC header and the absent last LF, if the length of the MAC PDU is different from the TB size.

Dependencies are inferred from the claim text.

Apparatus and method for generating and parsing mac pdu in a mobile communication system

Life of this patent

Apparatus and method for generating and parsing mac pdu in a mobile communication system

Life of this patent

Abstract

Claims22