Patent ID: 11894890
Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A Responder apparatus comprising:
a receiver which, in operation, receives a feedback request frame from an Initiator apparatus after a transmission sector sweep (TXSS) is performed, the feedback request frame including a Beamforming (BF) Training Type field in which a value indicating one of single input single output (SISO) BF training, single user MIMO (SU-MIMO) BF training, multi user MIMO (MU-MIMO) BF training, or a reserved value is set, wherein the receiver is capable of receiving a value indicating the SISO BF training, a value indicating the SU-MIMO BF training, a value indicating the multi user MIMO (MU-MIMO) BF training and a value indicating the reserved value;
measurement circuitry which, in operation, measures Signal to Noise Ratio (SNR) of sectors used for reception in the TXSS;
a transmitter which, in operation, transmits a feedback frame to the Initiator apparatus, the feedback frame including a Sector ID Order subfield and an SNR subfield, wherein the Sector ID Order subfield indicates a plurality of sector IDs and a plurality of antennas corresponding to at least a portion of the sectors used for reception in the TXSS, and wherein the SNR subfield indicates SNRs of the sectors; and
control circuitry which, in operation, performs BF training of a type indicated by the BF Training Type field, based on the Sector ID Order subfield and the SNR subfield.