Patent ID: 11882596
Assignee: MEDIATEK SINGAPORE PTE. LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A wireless device, comprising:
a processor; and
a network interface under control of said processor and operable to transmit data over a wireless network, and wherein the processor is operable to cause the network interface to:
transmit a request to send (RTS) frame for receipt by a wireless access point (AP), the RTS frame comprising:
a subchannel bitmap indicating allowed subchannels and disallowed subchannels for transmitting a clear to send (CTS) frame; and
a bandwidth control field comprising: a preamble puncture enabled subfield for indicating an enabled status for preamble puncturing; and a mode subfield for indicating between a static bandwidth indication and a dynamic bandwidth indication; and

receive the CTS frame from the wireless AP on an 80 MHz channel comprising a 20 MHz subchannel indicated in the subchannel bitmap as a particular disallowed subchannel, wherein the CTS frame comprises a 20 MHz punctured preamble to avoid transmitting on the 20 MHz subchannel.