US 12,218,787 B2
Communication apparatus, information processing apparatus, control method, and storage medium
Hirohiko Inohiza, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Aug. 26, 2021, as Appl. No. 17/458,089.
Application 17/458,089 is a continuation of application No. PCT/JP2020/005306, filed on Feb. 12, 2020.
Claims priority of application No. 2019-036701 (JP), filed on Feb. 28, 2019.
Prior Publication US 2022/0052889 A1, Feb. 17, 2022
Int. Cl. H04L 27/26 (2006.01); H04L 5/00 (2006.01); H04W 84/12 (2009.01)
CPC H04L 27/2602 (2013.01) [H04L 5/0007 (2013.01); H04W 84/12 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A communication apparatus comprising: at least one memory that stores a set of instructions; and
at least one processor,
wherein the communication apparatus is caused, by the at least one processor executing the instructions, to perform operations comprising:
generating an Extremely High Throughput Multi User Physical layer Protocol Data Unit (EHT MU PPDU) in compliance with Institute of Electrical and Electronics Engineers (IEEE) 802.11 series standards including a preamble and a data field; and
transmitting the generated EHT MU PPDU,
wherein the preamble includes:
a Legacy Short Training Field (L-STF),
a Legacy Long Training Field (L-LTF),
a Legacy Signal Field (L-SIG),
a second Signal Field, a third Signal Field,
an EHT Short Training Field (EHT-STF), and
an EHT Long Training Field (EHT-LTF) in this order,
wherein the second Signal Field includes a subfield of 1 bit indicating whether the EHT MU PPDU is for Uplink (UL) or for Downlink (DL), a subfield indicating Modulation and Coding Scheme (MCS) of the third Signal Field, a subfield of 3 bits indicating information related to a bandwidth, and a subfield of 7 bits indicating information related to Transmission Opportunity (TXOP),
wherein the third Signal Field includes a Common field and a User field,
wherein the Common field includes a subfield indicating information related to Resource Unit (RU) Allocation, a subfield of 4 bits indicating a CRC computed value, and a subfield of 6 bits indicating a Tail,
wherein the user field includes 22 bits, including a subfield of four bits to which a value is set, the value being obtained by subtracting 1 from a number of Space-Time Streams to be used for communication only with one communication partner apparatus corresponding to the User field among a plurality of communication partner apparatuses with which the communication apparatus communicates by Orthogonal Frequency-Division Multiple Access (OFDMA) using the EHT MU PPDU,
wherein the data field contains data to be transmitted to the one communication partner apparatus corresponding to the User field among the plurality of communication partner apparatuses, the data being transmitted with as many streams as the number of Space-Time Streams, and
wherein, in a case where each bit of the subfield of four bits is zero, the number of Space-Time Streams is one.