Coexistence of a normal-rate physical layer and a low-rate physical layer in a wireless network

摘要

A system including a midamble detection module and a processing module. The midamble detection module is configured to detect a midamble of a packet transmitted via a channel, where the packet includes (i) a preamble, (ii) the midamble, and (iii) a plurality of data fields, where the preamble includes (i) a first short training field, (ii) a first long training field, and (iii) a signal field, where the midamble includes (i) a second short training field and (ii) a second long training field, and where the midamble follows the preamble and is between two or more of the data fields. The processing module is configured to determine that the channel is busy in response to detecting the midamble in the packet.

主权项

1. A client station comprising:
a receiver physical layer module configured to communicate at a first data rate via (i) a first sub-channel or (ii) a second sub-channel of a channel; a receiver midamble detection module configured to
detect a midamble of a packet transmitted via the channel, wherein the packet includes (i) a preamble, (ii) the midamble, and (iii) a plurality of data fields, wherein the preamble includes (i) a first short training field, (ii) a first long training field, and (iii) a signal field, wherein the midamble includes (i) a second short training field and (ii) a second long training field, and wherein the midamble follows the preamble and is between two or more of the data fields; anddetect the midamble in (i) the first sub-channel or (ii) the second sub-channel in response to the midamble being transmitted at a second data rate via (i) the first sub-channel and (ii) the second sub-channel, wherein the second data rate is greater than the first data rate; and a receiver processing module is configured to
determine, in response to the midamble being detected in (i) the first sub-channel or (ii) the second sub-channel, that a transmission at the second data rate is ongoing in the channel, anddetermine, in response to the midamble not being detected in the packet, whether the channel is busy in response to detecting the preamble,wherein responsive to the channel being determined to be busy, the receiver processing module decides not to access the channel.