Patent ID: 11877274
Assignee: MARVELL ASIA PTE LTD
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. The method of claim 9, further comprising:
determining, at the first communication device, one or more third frequency subchannels within the first communication channel that are busy;
determining, at the first communication device, one or more fourth frequency subchannels within the second communication channel that are busy;
in response to receiving the one or more first trigger frames, transmitting one or more first quality of service (QoS) Null frames in the first communication channel, including i) not transmitting in any first frequency subchannels corresponding to first bits in the first bitmap set to the particular bit value and ii) not transmitting in any third frequency subchannels; and
in response to receiving the one or more second trigger frames, transmitting one or more second QoS Null frames in the second communication channel, including i) not transmitting in any second frequency subchannels corresponding to second bits in the second bitmap set to the particular bit value and ii) not transmitting in any fourth frequency subchannels; and
wherein the one or more first QoS Null frames in the first communication channel are transmitted simultaneously with transmission of the one or more second QoS Null frames in the second communication channel.