Patent ID: 11871367
Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. A method for a multiple-input multiple-output (MIMO) communication, the method comprising:
transmitting, during a first time period before a second time period, a first null data packet announcement to a device from a first access point;
transmitting by the first access point to a second access point during the second time period, information for a joint transmission by the first access point and the second access point to the device, the second access point to estimate synchronization information for the joint transmission according to the information for the joint transmission; and
transmitting, during a third time period after the second time period and the first time period, by the first access point, a portion of a null data packet to the device, the second access point to transmit the portion of the null data packet to the device, according to the synchronization information for the joint transmission by the first access point and the second access point to the device, the device to determine steering information for the MIMO communication, according to the null data packet.