Patent ID: 11956781
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 10:
11. A communication device for a wireless station, the communication device comprising:
a circuitry configured to:
cause the wireless station to transmit a first frame to another wireless station using a plurality of antennas, wherein the first frame comprises first information indicating a first bandwidth and second information indicating a number of a first set of spatial streams;
cause the wireless station to receive a second frame from the another wireless station using a second bandwidth and a second set of spatial streams; and
determine that the another wireless station has received the first frame at least based on the second bandwidth or a number of the second set of spatial streams, wherein:

the second frame comprises user data;
the second bandwidth is narrower than or equal to the first bandwidth; and
the number of the second set of spatial streams is smaller than or equal to the number of the first set of spatial streams.