# US 10,320,545 B2 · Method and device for forming control field comprising information about resource units in wireless LAN system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,320,545 B2 - Document ID: US10320545B2 - Status: Granted - Kind: B2 - Application number: 15/526,307 - Filed: 2016-08-10 - Published: 2017-12-28 - Granted: 2019-06-11 - Earliest claimed: 2015-08-10 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Jinsoo Choi; Dongguk Lim; Hangyu Cho; Eunsung Park - Web page: https://patentgrep.com/patent/US10320545B2 ## CPC - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} - H04L 1/0025: {Transmission of mode-switching indication} - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04L 5/0039: {Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0092: {Indication of how the channel is divided} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 27/2602: {Signal structure} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 84/12: WLAN [Wireless Local Area Networks] - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 27/26025: {Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003)} - H04L 27/2603: {Signal structure ensuring backward compatibility with legacy system} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided is a control field comprising allocation information about resource units (RUs) in a wireless LAN system in which a plurality of RUs are supported. A control field comprising allocation information about RUs can be comprised in an uplink or downlink PPDU and can be designed in accordance with a plurality of frequency bands. A control field corresponding to a particular frequency band can be duplicated over another frequency band. Also, the control field corresponding to the particular frequency band can be used for scheduling of a data field corresponding to the same frequency band and a data field corresponding to another frequency band. ## Claims ### Claim 1 A method of transmitting a physical layer protocol data unit (PPDU) in a wireless local area network (WLAN), the method comprising: generating the PPDU including a first, a second, a third and a fourth data field used for a first, a second, a third and a fourth frequency band, respectively; and transmitting the PPDU, wherein the PPDU includes a first signal field used for the first frequency band and a second signal field used for the second frequency band, wherein the first signal field includes first identification information on at least one station (STA) allocated to the first data field and the third data field, wherein the first signal field further includes first allocation information on at least one resource unit (RU) for the first data field and the third data field, wherein the second signal field includes second identification information on at least one STA allocated to the second data field and the fourth data field, wherein the second signal field further includes second allocation information on at least one RU for the second data field and the fourth data field, wherein the PPDU includes a third signal field used for the third frequency band, and the first identification information and the first allocation information are included in the third signal field, and wherein the PPDU includes a fourth signal field used for the fourth frequency band, and the second identification information and the second allocation information are included in the fourth signal field. ### Claim 2 (depends on 1) The method of claim 1, wherein the first identification information includes an association identifier (AID) of the at least one STA allocated to the first data field and the third data field. ### Claim 3 (depends on 1) The method of claim 1, wherein the first signal field includes a look-up table used for the at least one RU for the first data field and the third data field. ### Claim 4 (depends on 1) The method of claim 1, wherein the first signal field includes a user common field and a user specific field, wherein the first identification information is included in the user common field, and wherein the first allocation information is included in the user specific field. ### Claim 5 (depends on 1) The method of claim 1, wherein each of the first to fourth frequency bands includes a 20 MHz band. ### Claim 6 An apparatus in a wireless local area network (WLAN) system, the apparatus comprising: a radio frequency (RF) unit for transmitting a physical layer protocol data unit (PPDU); and a processor operatively coupled to the RF unit, wherein the processor is configured for: generating the PPDU including a first, a second, a third and a fourth data field used for a first, a second, a third and a fourth frequency band, respectively; and transmitting the PPDU, wherein the PPDU includes a first signal field used for the first frequency band and a second signal field used for the second frequency band, wherein the first signal field includes first identification information on at least one station (STA) allocated to the first data field and the third data field, wherein the first signal field further includes first allocation information on at least one resource unit (RU) for the first data field and the third data field, wherein the second signal field includes second identification information on at least one STA allocated to the second data field and the fourth data field, wherein the second signal further includes second allocation information on at least one RU for the second data field and the fourth data field, wherein the PPDU includes a third signal field used for the third frequency band, and the first identification information and the first allocation information are included in the third signal field, and wherein the PPDU includes a fourth signal field used for the fourth frequency band, and the second identification information and the second allocation information are included in the fourth signal field. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein the first identification information includes an association identifier (AID) of the at least one STA allocated to the first data field and the third data field. ### Claim 8 (depends on 6) The apparatus of claim 6, wherein the first signal field includes a look-up table used for the at least one RU for the first data field and the third data field. ### Claim 9 (depends on 6) The apparatus of claim 6, wherein the first signal field includes a user common field and a user specific field, wherein the first identification information is included in the user common field, and wherein the first allocation information is included in the user specific field. ### Claim 10 (depends on 6) The apparatus of claim 6, wherein each of the first to fourth frequency bands includes a 20 MHz band. ### Claim 11 An apparatus in a wireless local area network (WLAN) system, the apparatus comprising: a radio frequency (RF) unit for receiving a radio signal; and a processor operatively coupled to the RF unit, wherein the processor is configured to: instruct the RF unit to receive a physical layer protocol data unit (PPDU) including a first, a second, a third and a fourth data field used for a first, a second, a third and a fourth frequency band, respectively; and decode the PPDU, wherein the PPDU includes a first signal field used for the first frequency band and a second signal field used for the second frequency band, wherein the first signal field includes first identification information on at least one station (STA) allocated to the first data field and the third data field, wherein the first signal field further includes first allocation information on at least one resource unit (RU) for the first data field and the third data field, wherein the second signal field includes second identification information on at least one STA allocated to the second data field and the fourth data field, wherein the second signal further includes second allocation information on at least one RU for the second data field and the fourth data field, wherein the PPDU includes a third signal field used for the third frequency band, and the first identification information and the first allocation information are included in the third signal field, and wherein the PPDU includes a fourth signal field used for the fourth frequency band, and the second identification information and the second allocation information are included in the fourth signal field. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the first identification information includes an association identifier (AID) of the at least one STA allocated to the first data field and the third data field. ### Claim 13 (depends on 11) The apparatus of claim 11, wherein the first signal field includes a look-up table used for the at least one RU for the first data field and the third data field. ### Claim 14 (depends on 11) The apparatus of claim 11, wherein the first signal field includes a user common field and a user specific field, wherein the first identification information is included in the user common field, and wherein the first allocation information is included in the user specific field. ### Claim 15 (depends on 11) The apparatus of claim 11, wherein each of the first to fourth frequency bands includes a 20 MHz band.