WLAN OFDMA SYSTEM AND METHOD FOR WLAN OFDMA DESIGN OF SUBCARRIER GROUPS AND FRAME FORMAT

摘要

Embodiments are provided for WLAN orthogonal frequency division multiple access (OFDMA) designs of subcarrier groups and corresponding frame formats. The method of one embodiment includes grouping a plurality of subcarriers for DMA transmission into a plurality of subcarrier groups according to a predefined grouping structure for the subcarriers. The method further comprises allocating a subcarrier group to a plurality of corresponding users and signaling a map of subcarrier groups for the user to a corresponding user. According to a predefined grouping structure, each subcarrier group includes, in accordance with a crystal structure, a plurality of consecutive subcarrier groups, a plurality of discontinuous subcarrier groups or a combination of consecutive subcarriers and discontinuous subcarriers . A MAP is signaled using an OFDMA PPDU including a legacy preamble portion configured to silence legacy users that do not use OFDMA communication, an OFDMA preamble portion indicating a map, and a data portion.