Patent ID: 8472400

Claim:
A method of constructing a data unit to include control information, the method comprising: receiving one or more service data units (SDUs) from an upper layer; generating a protocol data unit (PDU) using the received one or more SDUs, wherein the PDU includes a header, one or more control elements, the received one or more SDUs or a number of available padding bits; and transmitting the generated PDU to a receiving side, wherein the header includes a plurality of sub-headers, wherein each of the plurality of sub-headers corresponds to a received SDU, a control element or padding, wherein the one or more control elements are placed before the received one or more SDUs, wherein the number of available padding bits is equal to or greater than the number of bits associated with a short buffer status Report (BSR) plus a corresponding sub-header and less than the number of bits associated with a long BSR plus a corresponding sub-header, wherein one of the one or more control elements has a corresponding sub-header that comprises a logical channel identification (LCID) field indicating that a BSR is included in the one control element, wherein the LCID field comprises a value corresponding to a predefined BSR other than a short BSR and a long BSR, wherein the predefined BSR has a format that is equivalent to the short BSR, and wherein the value indicates that there is data associated with more than one logical channel group.