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

Claim 0:
1. A method for a multiple-input multiple-output (MIMO) communication for a first access point and a second access point, the method comprising:
transmitting, during a first time period before a second time period, a trigger frame to the second access point, the second access point to estimate, according to the trigger frame, synchronization information for a first null data packet announcement;
transmitting, during a third time period between the second time period and the first time period, the first null data packet announcement to a device; and
transmitting, during the second time period after the first time period, by the first access point, a portion of a null data packet to the device, the second access point transmitting the portion of the null data packet to the device, according to the synchronization information for a 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.