Patent ID: 8223740
Filing Date: 2012-07-17
Classification: H04B

Abstract:
1. A method of transmitting feedback information in a Multi-Input, Multi-Output (MIMO) system, the method comprising: receiving, by a mobile station (MS), a feedback type field; and transmitting, by the MS, a Protocol Data Unit (PDU) that includes a Medium Access Channel (MAC) header, an extended subheader group and a payload, wherein the MAC header includes an Extended Subheader field (ESF) indicating that the extended subheader group is present in the PDU, wherein the extended subheader group appears immediately after the MAC header and comprises a MIMO mode feedback extended subheader, and wherein the MIMO mode feedback extended subheader comprises a feedback contents field that includes at least antenna grouping information, antenna selection information, or reduced precoding matrix codebook information based on the received feedback type field.