CN-113766440-B - Apparatus and method for signaling extension in wireless local area network system

Abstract

An apparatus and method for signaling extension in a wireless local area network system are provided. A method of communicating between a first device (e.g., an AP) and each of a legacy device and a non-legacy device (e.g., a STA) includes generating, at the first device, a first information field for the legacy device, generating a second information field for the non-legacy device, generating a frame including the first information field and the second information field, and transmitting the frame, wherein the first information field includes a first value by which the legacy device identifies the first information field as valid, wherein the second information field includes a second value by which the legacy device identifies the second information field as invalid.

Inventors

• HAN ZONGXUN
• ZHENG ZHEHAO

Assignees

• 三星电子株式会社

Dates

Publication Date

20260505

Application Date

20210528

Priority Date

20200602

Claims (6)

1. 1. A first receiving apparatus of a wireless local area network system, the first receiving apparatus comprising: a transceiver configured to receive a protocol data unit comprising a preamble and a payload from a transmitting device and decode the payload based on the preamble, and A processor configured to control the transceiver, Wherein the data field of the payload comprises a trigger frame in the form of a single media access control, MAC, protocol data unit, Wherein the trigger frame comprises a MAC header and a frame body, Wherein the frame body includes a common information field and a user information field applied to the first receiving apparatus, and further includes a common information field, a user information field, and a padding field applied to a second receiving apparatus, the second receiving apparatus supporting a standard different from that supported by the first receiving apparatus, Wherein the common information field and the user information field applied to the second receiving apparatus are allocated before the padding field, and Wherein the common information field and the user information field applied to the first receiving apparatus are allocated after the padding field.
2. 2. The first receiving device of claim 1, wherein an index of an identifier subfield in the padding field indicates that the padding field is a padding field for the second receiving device, and indicates that a common information field and a user information field applied to the first receiving device are allocated after the padding field.
3. 3. The first receiving apparatus of claim 1, wherein the frame body further comprises an additional padding field for the first receiving apparatus, Wherein the index of the identifier subfield in the additional pad field includes an index corresponding to any one of indexes indicated to be reserved in the identifier subfield in the user information field applied to the second receiving apparatus, and indicates that the additional pad field is a pad field for the first receiving apparatus.
4. 4. A wireless communication method of a first receiving apparatus in a wireless local area network system, the wireless communication method comprising: Receiving a protocol data unit comprising a preamble and a payload, and Decoding the payload based on the preamble, Wherein the data field of the payload comprises a trigger frame in the form of a single media access control, MAC, protocol data unit, Wherein the trigger frame comprises a MAC header and a frame body, Wherein the frame body includes a common information field and a user information field applied to the first receiving apparatus, and further includes a common information field, a user information field, and a padding field applied to a second receiving apparatus, the second receiving apparatus supporting a standard different from that supported by the first receiving apparatus, Wherein the common information field and the user information field applied to the second receiving apparatus are allocated before the padding field, and Wherein the common information field and the user information field applied to the first receiving apparatus are allocated after the padding field.
5. 5. The wireless communication method of claim 4, wherein the index of the identifier subfield in the pad field indicates that the pad field is a pad field for the second receiving device and indicates that a common information field and a user information field applied to the first receiving device are allocated after the pad field.
6. 6. The wireless communication method of claim 4, wherein the frame body further comprises an additional padding field for the first receiving device, Wherein the index of the identifier subfield in the additional pad field includes an index corresponding to any one of indexes indicated to be reserved in the identifier subfield in the user information field applied to the second receiving apparatus, and indicates that the additional pad field is a pad field for the first receiving apparatus.

Description

Apparatus and method for signaling extension in wireless local area network system Cross Reference to Related Applications This application is based on and claims priority of korean patent application No.10-2020-0066702 filed in the korean intellectual property office at 2 nd month 6 in 2020, korean patent application No. 10-2020-015513 filed in 9 th 2020, and korean patent application No.10-2021-0033456 filed in 15 th 3 of 2021, the disclosures of which are incorporated herein by reference in their entirety. Technical Field The present disclosure relates generally to wireless communications, and in particular, to an apparatus and method for signaling expansion in a Wireless Local Area Network (WLAN) system. Background WLAN systems connect two or more devices to each other in a local environment such as a home, building, or campus, and typically connect these devices to the internet. The latest WLAN technology is based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard. The 802.11 standard has evolved into 802.11b, 802.11a, 802.11g, 802.11n, 802.11ac, and 802.11ax versions, with the most recent versions being able to support transmission rates up to 1Gbyte/s using current Orthogonal Frequency Division Multiplexing (OFDM) techniques. In a typical WLAN, an Access Point (AP) acts as a gateway to connect user devices such as laptops and smartphones to the internet. Each user device may communicate with the AP and/or another user device using an assigned set of OFDM subcarriers within the entire frequency band of the WLAN. In the WLAN standard (release) 802.11ac, data may be transmitted to multiple users simultaneously through multi-user multiple input multiple output (MU-MIMO) technology. However, WLAN systems employing 802.11ac allow uplink signals to be transmitted from one user device to one AP only at a time, which may cause data communication to be slowed down in an area where users are concentrated. The crowded user problem is addressed in release 802.11ax (also known as High Efficiency (HE)), which enables uplink communications from multiple user devices to an AP simultaneously using Orthogonal Frequency Division Multiple Access (OFDMA) techniques. With OFDMA, user devices are each assigned a Resource Unit (RU) comprising a set of OFDM subcarriers. RU is used for both uplink and downlink so that WLAN systems applying 802.11ax (which also use MU-MIMO) can efficiently support communication in a local area and an outdoor area where users are numerous. Furthermore, the next generation WLAN standard 802.11be (also known as Extremely High Throughput (EHT)) is expected to implement 6GHz unlicensed band support, bandwidths of up to 320MHz per channel, introduce hybrid automatic repeat request (HARQ), and support up to 16x16 MIMO. With this capability, next generation WLAN systems are expected to efficiently support low latency and ultra high speed transmissions with performance metrics similar to New Radio (NR) 5G technology. Disclosure of Invention Embodiments of the present disclosure provide an apparatus and method for extending signaling while maintaining backward compatibility in a Wireless Local Area Network (WLAN) system. According to one aspect of the disclosure, a method of communicating between a first device (e.g., an AP) and each of a legacy device and a non-legacy device (e.g., a station STA) includes generating a first information field for the legacy device, generating a second information field for the non-legacy device, generating a frame including the first information field and the second information field, and transmitting the frame. The first information field includes a first value that allows the first information field to be identified as valid by the legacy device. The second information field includes a second value that allows the second information field to be identified as invalid by the legacy device. According to another aspect of the disclosure, a first apparatus for communicating with legacy and non-legacy apparatuses includes a transceiver configured to generate a first information field for the legacy apparatus, generate a second information field for the non-legacy apparatus, generate a frame including the first information field and the second information field, and transmit the frame, and a processor configured to control the transceiver. The first information field includes a first value that allows the first information field to be identified as valid by the legacy device and the second information field includes a second value that allows the second information field to be identified as invalid by the legacy device. According to another aspect of the disclosure, a method of communicating by a non-legacy device with a first device, the first device communicating with a legacy device, the method includes, at the non-legacy device, receiving a frame from the first device, extracting a first information field and a second information field from th