US-12628220-B2 - Method and apparatus for cooperative communication using multi-link in communication system

US12628220B2US 12628220 B2US12628220 B2US 12628220B2US-12628220-B2

Abstract

Disclosed are a method and apparatus for cooperative communication using a multi-link in a communication system. An operating method of a first device comprises the steps of: generating a first request frame including an information element indicating a link switch time point; transmitting, to a second device, the first request frame via a first link; and receiving, from the second device via the first link, a first response frame indicating that the information element included in the first request frame has been identified.

Inventors

Yong Ho Kim
Han Seul Hong

Assignees

HYUNDAI MOTOR COMPANY
KIA CORPORATION
KOREA NATIONAL UNIVERSITY OF TRANSPORTATION INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Dates

Publication Date: 20260512
Application Date: 20201023
Priority Date: 20191031

Claims (12)

1 . A method for operating a first device supporting a multi-link including a first link and a second link in a wireless local area network (LAN) system, the method comprising: receiving, by a first access point (AP) of the first device from a second device, a first frame on the first link; in response to the first frame, transmitting, by the first AP of the first device to the second device, a second frame on the first link; and performing, by a second AP of the first device, a communication operation with the second device in the second link based on information in the second frame, wherein the first frame is related to multi-link communications, wherein the first frame includes an identifier of the second link, and wherein the second frame includes an information element indicating a target beacon transmission time (TBTT) for the second AP of the first device.
2 . The method of claim 1 , wherein the first frame further includes a capability information element of the second device through the first link, wherein the second frame is a response frame for the first frame.
3 . The method of claim 2 , wherein the first frame further includes an information element indicative of supporting the communication operation in the second link.
4 . The method of claim 2 , wherein the first frame comprises a probe request frame, an action frame, or a management frame.
5 . The method of claim 1 , wherein second frame includes system information of one or more STAs of the first device, and wherein each of the one or more STAs is an access point (AP) STA or a non-AP STA.
6 . The method of claim 1 , wherein the second frame comprises a probe response frame or a beacon frame.
7 . A first device supporting a multi-link including a first link and a second link in a wireless local area network (LAN) system, the first device comprising: at least one transceiver; at least one memory configured to store instructions; at least one processor operably coupled to the at least one memory and configured, by executing the instructions, to: receive, from a second device, a first frame on the first link, in response to the first frame, transmit, to a second device, a second frame on the first link; and perform a communication operation with the second device in the second link based on information in the second frame, wherein the first frame is related to multi-link communications, wherein the first frame includes an identifier of the second link, and wherein the second frame includes an information element indicating a target beacon transmission time (TBTT) for a second access point (AP) of the first device.
8 . The first device of claim 7 , wherein the first frame further includes a capability information element of the second device through the first link, wherein the second frame is a response frame for the first frame.
9 . The first device of claim 8 , wherein the first frame further includes an information element indicative of supporting the communication operation in the second link.
10 . The first device of claim 8 , wherein the first frame comprises a probe request frame, an action frame, or a management frame.
11 . The first device of claim 7 , wherein the second frame includes system information of one or more STAs of the first device, and wherein each of the one or more STAs is an access point (AP) STA or a non-AP STA.
12 . The first device of claim 7 , wherein the second frame comprises a probe response frame or a beacon frame.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a U.S. national stage of International Application No. PCT/KR2020/014573, filed on Oct. 23, 2020, which claims priority to Korean Patent Application No. 10-2019-0138101, filed on Oct. 31, 2019. Korean Patent Application No. 10-2019-0138816, filed on Nov. 1, 2019, and Korean Patent Application No. 10-2020-0130531, filed on Oct. 8, 2020, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to a wireless local area network (LAN) communication technique, and more particularly, to a communication technique using a multi-link having different bands in a wireless LAN system. BACKGROUND ART Recently, as the distribution of mobile devices has been expanded, a wireless LAN technology capable of providing fast wireless communication services to mobile devices has been in the spotlight. The standards using the wireless LAN technology are mainly being developed as Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards by the IEEE. An early version of the IEEE 802.11 standard can support a communication speed of 1 to 2 megabits per second (Mbps), and subsequent versions of the IEEE 802.11 standards are being standardized in a direction of improving the communication speed. In addition, the IEEE 802.11 standards define fast handoff technologies (e.g., fast basic service set (BSS) transition), fast initial link setup technologies, technologies for stations (e.g., low-power stations) operating in a band below 1 gigahertz (i.e., sub-GHz band), vehicle communication technologies, and the like. An STAtion may directly communicate with another station without performing an authentication procedure and an association procedure with an access point. In other words, the station may support ‘outside context of BSS (OCB)’ communications. The vehicle communication technologies were reflected in the IEEE 802.11p standard. The IEEE 802.11p standard can support a signal form defined in the IEEE 802.11a Standard and an Enhanced Distributed Channel Access (EDCA) defined in the IEEE 802.11e standard. Communications according to the IEEE 802.11p standard may operate in a 5.9 GHz band. A basic bandwidth of the IEEE 802.11p standard may be configured to support communications of a mobile station (e.g., station moving at a high speed). For example, the basic bandwidth of the IEEE 802.11p standard may be 10 megahertz (MHz). Various sensors and operations are being developed for vehicle communications, and various applications for the corresponding operations are being developed. In order to improve a data throughput and/or transmission distance compared to the IEEE 802.11p standard, standardization of next-generation vehicle-to-everything (NGV) technologies is in progress in the IEEE 802.11bd. In addition, since recent applications require a high data throughput and/or real-time transmission, extreme high throughput (EHT) wireless LAN technologies are being developed to support the same. DISCLOSURE Technical Problem The present disclosure is directed to providing a method and an apparatus for communications using a multi-link supporting different bands in a wireless LAN system. Technical Solution An operation method of a first device according to a first embodiment of the present disclosure may comprise: generating a first request frame including an information element indicating a link switch time; transmitting, to a second device, the first request frame through the first link; and receiving, from the second device, a first response frame indicating that the information element included in the first request frame is confirmed through the first link. The link switch time indicates a time at which an operating link is switched from the first link to the second link. One or more stations (STAs) are affiliated with each of the first device and the second device. Each of the one or more STAs is an access point (AP) STA or a non-AP STA. The operation method may further comprise: performing a procedure of confirming a link switch with the second device in the second link; and performing communication with the second device by using the second link when the operating link is confirmed to be switched from the first link to the second link. The procedure of confirming the link switch may comprise: transmitting, to the second device, a second request frame requesting confirmation of the link switch through the second link; and receiving, from the second device, a second response frame indicating that the link switch is completed through the second link. The operation method may further comprise: performing a procedure of confirming a link switch with the second device in the second link; and performing communication with the second device by using the first link when the operating link is confirmed not to be switched from the first link to the second link. The first request frame or the first response frame may furt