WO2023039734A1 - Multi-link communication method, apparatus and device, and medium - Google Patents

Abstract

The present application relates to the technical field of communications. Disclosed are a multi-link communication method, apparatus and device, and a medium. The method is executed by a first multi-link device, wherein the first multi-link device and a second multi-link device are connected by means of at least two links, and the at least two links are non-simultaneous transmission/reception links. The method comprises: where at least two links meet a condition for starting physical protocol data unit (PPDU) transmission at the same time, starting to transmit a PPDU on a first link of the at least two links at a first moment; and ignoring the channel state of a second link between the first moment and a second moment, and determining whether to start to transmit a PPDU on the second link of the at least two links at the second moment, wherein the second link is any of the at least two links that is different from the first link, and the second moment is not earlier than the first moment. By means of the method, PPDUs can be simultaneously transmitted.

Description

Multi-link communication method, device, equipment and medium technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a multi-link communication method, device, device, and medium.

Background technique

In IEEE (Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronics Engineers) 802.11be, a function that can support multiple links (Multiple Links) is defined. According to the definition of both ends of the communication in IEEE 802.11, multiple links are established between the station (Station, STA) multi-link device (Multi-Link Device, MLD) and the access point (Access Point, AP) MLD, and the STA MLD And AP MLD can take advantage of multi-links to send and receive data on multiple links to achieve high throughput, low latency and other advantages.

In the interconnection of two devices that support Multiple Links Operation (MLO), a NSTR (Non-simultaneous Transmission and Reception, not capable of sending and receiving at the same time) MLD device that supports IEEE 802.11be is defined. If the NSTR MLD device If you want to use multiple links at the same time, you need to send or receive on multiple links at the same time.

Since multiple links independently perform EDCA (Enhanced Distributed Channel Access, Enhanced Distributed Channel Access) backoff (backoff), the time references on different links are also independent of each other. After multiple links meet the simultaneous sending conditions, multiple The time difference between two links starting to transmit PPDU (PHY Protocol Data Unit, physical layer protocol packet unit) shall not exceed 4μs (microseconds), then the link that starts transmission first will affect the channel state of the link that starts transmission later, and then affect the PPDU transmission.

Contents of the invention

Embodiments of the present application provide a multi-link communication method, device, device, and medium, which can realize simultaneous data transmission on multiple links. Described technical scheme is as follows:

According to an aspect of the embodiments of the present application, a multi-link communication method is provided, the method is executed by a first multi-link device, and a connection between the first multi-link device and the second multi-link device is At least two links, the at least two links are links that cannot be sent and received at the same time; the method includes:

When the at least two links meet the condition of simultaneously starting the transmission of the physical layer protocol packet unit PPDU, at the first moment, the first link of the at least two links starts to transmit the PPDU;

ignoring the channel state of the second link from the first moment to the second moment;

determining whether to start transmitting PPDUs on said second link of said at least two links at said second time instant;

Wherein, the second link is any link in the at least two links that is different from the first link, and the second moment is not earlier than the first moment.

According to an aspect of the embodiments of the present application, a multi-link communication device is provided, at least two links are connected between the first multi-link device and the second multi-link device, and the at least two links The path is a link that cannot be sent and received at the same time; the device includes:

A transmission module, configured to start transmitting PPDUs on the first link of the at least two links at a first moment when the at least two links meet the condition of starting physical layer protocol packet unit PPDU transmission at the same time;

A monitoring module, configured to ignore the channel state of the second link from the first moment to the second moment;

The transmission module is configured to determine whether to start transmitting PPDUs on the second link of the at least two links at the second moment;

Wherein, the second link is any link in the at least two links that is different from the first link, and the second moment is not earlier than the first moment.

According to an aspect of an embodiment of the present application, there is provided a multi-link device, the multi-link device includes a processor and a memory, and the memory stores at least one instruction, at least one program, a code set or an instruction set, The at least one instruction, the at least one program, the code set or instruction set are loaded and executed by the processor to implement the multi-link communication method according to any one of claims 1 to 16.

Exemplarily, the processor includes: an application specific integrated circuit (Application Specific Integrated Circuit, ASIC).

According to an aspect of the embodiments of the present application, a computer-readable storage medium is provided, where a computer program is stored in the storage medium, and the computer program is used for execution by a processor, so as to implement the foregoing multi-link communication method.

According to an aspect of an embodiment of the present application, a chip is provided, the chip includes a programmable logic circuit and/or program instructions, and when the chip is running, is used to implement the above multi-link communication method.

According to an aspect of the embodiments of the present application, a computer program product or computer program is provided, the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and a processor reads from the The computer-readable storage medium reads and executes the computer instructions, so as to implement the above-mentioned multi-link communication method.

The technical solutions provided in the embodiments of the present application can bring the following beneficial effects:

After multiple links satisfy the condition of simultaneously transmitting PPDUs, the second link that starts transmitting PPDUs later determines whether to start transmitting PPDUs by ignoring the influence of the first link that starts transmitting PPDUs earlier on the channel state. Through this method, the mutual influence of simultaneous transmission of multiple links is reduced, and STA MLD and/or AP MLD can realize simultaneous data transmission on multiple links, so as to achieve advantages such as high throughput and low delay.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic diagram of a wireless local area network provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of establishing a multi-link between a station MLD and an access point MLD provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

FIG. 10 is a flowchart of a multi-link communication method provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

FIG. 12 is a flowchart of a multi-link communication method provided by an embodiment of the present application;

FIG. 13 is a flowchart of a multi-link communication method provided by an embodiment of the present application;

FIG. 14 is a flowchart of a multi-link communication method provided by an embodiment of the present application;

FIG. 15 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

FIG. 16 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

FIG. 17 is a flowchart of a multi-link communication method provided by an embodiment of the present application;

FIG. 18 is a flowchart of a multi-link communication method provided by an embodiment of the present application;

FIG. 19 is a flowchart of a multi-link communication method provided by an embodiment of the present application;

FIG. 20 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

Fig. 21 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

Fig. 22 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

Fig. 23 is a schematic diagram of multi-link communication provided by an embodiment of the present application;

Fig. 24 is a block diagram of a multi-link communication device provided by an embodiment of the present application;

Fig. 25 is a schematic structural diagram of a multi-link device provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

The network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. The evolution of the technology and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

Please refer to FIG. 1, which shows a block diagram of a wireless local area network provided by an exemplary embodiment of the present application. The wireless local area network may include: a station (STA) MLD10 and an access point (AP) MLD 20.

In some scenarios, an AP can be called an AP STA, that is, in a sense, an AP is also a kind of STA. In some scenarios, STA is also called non-AP STA (non-AP STA).

In some embodiments, STAs may include AP STAs and non-AP STAs.

The communication in the communication system may be communication between AP and non-AP STA, or communication between non-AP STA and non-AP STA, or communication between STA and peer STA, where peer STA may refer to the communication with STA. Devices communicating with each other, for example, a peer STA may be an AP or a non-AP STA.

The AP is equivalent to a bridge connecting the wired network and the wireless network. Its main function is to connect various wireless network clients together, and then connect the wireless network to the Ethernet. The AP device may be a terminal device (such as a mobile phone) or a network device (such as a router) with a wireless-fidelity (wreless-fidelity, WiFi) chip.

It should be understood that the role of the STA in the communication system is not absolute. For example, in some scenarios, when the mobile phone is connected to the router, the mobile phone is a non-AP STA, and when the mobile phone is used as a hotspot for other mobile phones, the mobile phone acts as an AP. .

APs and non-AP STAs can be devices applied in the Internet of Vehicles, IoT nodes and sensors in the Internet of Things (IoT), smart cameras in smart homes, smart remote controls, smart water meters, etc. And sensors in smart cities, etc.

In some embodiments, the non-AP STA can support the 802.11be standard. The non-AP STA can also support 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a and other current and future wireless local area networks (wireless local area networks, WLAN) standards of the 802.11 family.

In some embodiments, the AP may be a device supporting the 802.11be standard. The AP may also be a device supporting various current and future 802.11 family wireless local area networks (wireless local area networks, WLAN) standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

In this embodiment of the application, the STA may be a mobile phone (Mobile Phone), tablet computer (Pad), computer, virtual reality (Virtual Reality, VR) device, augmented reality (Augmented Reality, AR) device, Wireless devices in industrial control, set-top boxes, wireless devices in self driving, vehicle communication devices, wireless devices in remote medical, wireless devices in smart grid , wireless devices in transportation safety, wireless devices in smart city or wireless devices in smart home, wireless communication chips/ASIC/SOC/etc.

The frequency bands supported by the WLAN technology may include but not limited to: low frequency bands (2.4GHz, 5GHz, 6GHz) and high frequency bands (60GHz).

Wherein, there are multiple links between the station MLD 10 and the access point MLD 20.

Wireless devices support multi-band communication, for example, communicate on 2.4GHz, 5GHz, 6GHz and 60GHz frequency bands at the same time, or communicate on different channels in the same frequency band (or different frequency bands) at the same time, improving the communication throughput between devices and/or or reliability. Such a device is usually called a multi-band device, or a multi-link device (Multi-Link Device, MLD), and is sometimes called a multi-link entity or a multi-band entity. A multi-link device can be an access point device or a station device. If the multi-link device is an access point device, the multi-link device contains one or more APs; if the multi-link device is a station device, the multi-link device contains one or more non-AP STAs.

A multi-link device including one or more APs or AP MLD, a multi-link device including one or more non-AP STAs or Non-AP MLD, in the application embodiment, Non-AP MLD may be called STA MLD.

In the embodiment of this application, the AP MLD can include multiple APs, and the Non-AP MLD can include multiple STAs. Multiple links can be formed between APs in the AP MLD and STAs in the Non-AP MLD. Data communication can be performed between the AP and the corresponding STA in the Non-AP MLD through the corresponding link.

As shown in Figure 2, the AP MLD can include AP1 and AP2, etc., and the Non-AP MLD includes STA1 and STA2, etc., wherein link 1 is formed between AP1 and STA1, link 2 is formed between AP2 and STA2, and so on. AP1 and STA1 can perform data communication through link 1, and AP2 and STA2 can perform data communication through link 2.

MLD can also be a logical entity with multiple affiliated stations (affiliated STA) and a single MAC SAP (Service Access Point) to LLC (Logical Link Control, Logical Link Control), Wherein, the MAC SAP includes a MAC data service.

The access point MLD 20 is a device deployed in a wireless local area network to provide wireless communication functions for the station MLD 10. The station MLD 10 may include: user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, user agent or user device. Optionally, the station MLD 10 can also be a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a Wireless Local Loop (Wireless Local Loop, WLL) station, a Personal Digital Assistant (PDA) , a handheld device with a wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, or a wearable device, which is not limited in this embodiment of the present application.

In the embodiment of this application, both the station MLD 10 and the access point MLD 20 support the IEEE 802.11 standard.

Before introducing the technical solution of this application, some technical knowledge involved in this application will be introduced.

In IEEE 802.11be, a function that can support IEEE 802.11 multilink is defined. According to the definition of both ends of communication in IEEE 802.11, one is the station MLD, and the other is the access point MLD. The station MLD and the access point MLD that have established multi-links can take advantage of the multi-links to send and receive data on multiple links, so as to achieve advantages such as high throughput/low delay.

In two devices that support the interconnection of Multiple Links Operation (MLO), a NSTR (Non-simultaneous Transmission and Reception, which cannot be sent and received at the same time) STA MLD that supports 802.11be is defined. In the NSTR STA MLD of Multiple Links, due to radio frequency limitations, when one link is transmitting, in-device interference (in-device interference) will occur, causing the other link to fail to receive normally. (reception), resulting in the inability to transmit and receive data independently and simultaneously on multiple links, that is, if this NSTR STA MLD wants to use multiple links at the same time, it needs to send or receive simultaneously on multiple links.

As shown in Figure 2, it is a UL (Up Link, uplink) process. Ideally, the transmission of NSTR STA MLD on the two links is aligned (Align) together, and the reception is also aligned (align) together . For example, NSTR STA MLD sends UL PPDU on link2/STA2 and link1/STA1 at the same time, and simultaneously receives BA (Block Acknowledgment) sent by AP MLD on link2/AP1 and link1/AP2.

Because in the current IEEE 802.11be, even on NSTR Links (links), the channel access (channel access) methods on each link (link) are independent of each other, that is, each link must use the standard IEEE 802.11 The EDCA mechanism to access the channel. EDCA in IEEE 802.11 is based on CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance, Carrier Sense Multiple Access/Collision Avoidance) mechanism, according to the type of frame (frame) and/or access code (Access Code, AC), first select an inter-frame interval (Inter Frame Space, IFS), and an initial random backoff slot value (backoff slot count); if the channel is idle (idle) in this IFS, then Start to detect the channel in each backoff slot (backoff time slot). If the channel is idle in a backoff slot, reduce the backoff slot count and continue to detect the channel in the next backoff until the backoff slot count is reduced to 0.

In the current IEEE 802.11, when NSTR STA MLD is sent on NSTR links at the same time, it is required that the Start Time (start time) of the UL PPDU should be aligned, and because each link in NSTR links is independently channeled to EDCA, This means that NSTR STA MLD must reduce the EDCA backoff slot count of all NSTR Links to 0 on NSTR links before allowing channel access on any link.

As shown in Figure 3, in NSTR STA MLD, the backoff slot count on link1/STA1 is first reduced to 0, and the EDCA backoff (backoff) process is completed; but at this time, the EDCA backoff process is still going on on link2/STA2, at this time In order to meet the alignment of the Start Time of the PPDU on the NSTR links, STA2 is not allowed to access the channel/send frames, resulting in the inability to send data packets on STA1.

In the current 802.11be, there is a mechanism to solve the above problems to meet the requirement that the Start Time of PPDUs on NSTR links need to be aligned together. In NSTR STA MLD, after the EDCA backoff is completed on any link, check whether the EDCA backoff process is completed on the other link. If the EDCA backoff is not completed on the other link, the current link will continue to maintain (hold) its backoff slot count It is 0 until the EDCA backoff process is completed on the other link, that is, the backoff slot count is also 0. At this time, NSTR STA MLD sends PPDUs on the two links at the same time.

As shown in Figure 4, STA2 has completed the EDCA backoff process, but STA1 is still in the EDCA backoff process, so STA2 keeps the backoff slot count at 0 until the backoff slot count of STA1 is 0, and NSTR STA MLD is on the two links Send PPDU at the same time.

In this mechanism, because NSTR MLD performs EDCA backoff independently on the two links (including randomly selecting an initial backoff slot count at the beginning), and the time references used by NSTR MLD on the two links are also independent of each other , in practice, although backoff is being performed on both links, each backoff backoff slot is not completely aligned. As shown in Figure 5, the length of each backoff slot on any link is the same. In 802.11, this backoff slot is 9μs. But each backoff slot boundary on link2/STA2 and link1/STA1 is not aligned with each other.

Because in the benchmark 802.11, it is required to start transmitting PPDU on the last backoff slot boundary (backoff time slot boundary). However, under multi-link, the backoff slot boundary on the multi-link cannot be aligned. Therefore, in 802.11be, when the above mechanism is adopted to transmit PPDUs on at least two links at the same time, the following provisions are made: Link1( Link 1/first link) first backoff slot value to 0 (backoff slot count is 0), but since Link2 (link 2/second link) is still in the backoff state, link 1 needs to keep The backoff slot count is 0. When the backoff slot count on link 2 is reduced to 0, link 2 starts to transmit PPDU2. As shown in Figure 6, in order to align the start time (Start Time) of PPDU transmission on the two links to be consistent as much as possible, even though the Backoff slot on link 2 (link2/STA2) has not yet reached the time slot boundary ( boundary) time point, 802.11be still requires link 2 to start transmitting PPDU2 on link 1 (link1/STA1) no later than 4 μs after the backoff slot 0 boundary of link 1 (link1/STA1).

Since the standard 802.11 stipulates to check whether the channel in this slot is idle only at a slot boundary, especially, when targeting backoff slot 0, if there is a channel in this slot (9μs) at this Backoff slot 0 boundary If it is busy, the transmission cannot be started on this slot 0 boundary.

In the above NSTR mechanism, when the backoff slot on a link has not yet reached the boundary, it is necessary to start transmitting PPDU. At this time, it is not clearly stipulated whether the transmission can be started if the channel is detected to be busy before the time point of starting to transmit the PPDU. For example, as shown in Figure 7, on link 2 (link2/STA2), before the time point (the second moment) when it is expected to start transmitting PPDU2, it is detected that the channel is busy. At this time, it is necessary to determine whether to send PPDU2.

In the above mechanism, since the Start Time of the two PPDUs is allowed to have a deviation of less than 4μs, the following situations will occur:

As shown in Figure 8, the time point when link2/STA2 expects to start transmitting PPDU2 is before the slot boundary of link2/STA2. Because in NSTR MLD, PPDU1 transmission has already started on link1/STA1 in advance, due to inter-device interference between link2/STA2 and link1/STA1, there will be PPDU1 transmission that has already started, making the channel monitoring results on link2/STA2 The channel is busy, but there is actually no other interference on link2/STA2 at this time.

As shown in Figure 9, when link1/STA1 starts transmission, link2/STA2 has also reached the backoff slot boundary when the distance from the backoff slot 0 boundary of link1/STA1 is no more than 4 μs. Because in NSTR MLD, PPDU1 transmission has already started on link1/STA1 in advance, due to inter-device interference between link2/STA2 and link1/STA1, there will be PPDU1 transmission that has already started, making the channel monitoring results on link2/STA2 The channel is busy, but there is no other interference on link2/STA2 at this time. According to the requirements of the standard 802.11, channel monitoring is performed at the slot boundary, but at this time, STA2 will think that the channel is busy and will not start transmitting PPDU2.

Since in the above mechanism, the link that starts transmission later is affected by the link that starts transmission earlier, it is impossible to determine whether to start transmitting PPDUs. The embodiment of the present application provides a multi-link communication method to solve this problem.

Please refer to FIG. 10 , which shows a flowchart of a multi-link communication method provided by an embodiment of the present application. The method may be executed by a first multi-link device. For example, the first multi-link device is any MLD in the communication system shown in FIG. 1 , and the MLD is a station MLD or an access point MLD. The method may include the steps of:

Step 210: In the case that at least two links meet the condition of simultaneously starting PPDU transmission, at a first moment, the first link among the at least two links starts to transmit the PPDU.

At least two links are connected between the first multi-link device and the second multi-link device. That is, the multi-link includes: at least two links between the first multi-link device and the second multi-link device, and the at least two links are non-simultaneously transceiving links (NSTR links).

Optionally, the first multi-link device serves as a data sending end in this data transmission, and of course, the first multi-link device may also serve as a data receiving end in other data transmission scenarios. The second multi-link device serves as a data receiving end in this data transmission, and of course, the second multi-link device may also serve as a data sending end in other data transmission scenarios.

Exemplarily, the first multi-link device may be a station MLD or an access point MLD; the second multi-link device may be a station MLD or an access point MLD.

Exemplarily, the at least two links may be all or part of the links between the first multi-link device and the second multi-link device.

Exemplarily, the condition for starting PPDU transmission at the same time may be: the backoff time slots of each link in the at least two links are all to backoff time slot 0. Backoff slot 0 is a backoff slot corresponding to a backoff slot value of 0.

Exemplarily, the time from each link in the at least two links to the backoff time slot 0 is different (there is a sequence in time).

The first link may be the last link to backoff slot 0 of the at least two links.

The first link may also be the x-th link to backoff slot 0 among the at least two links.

When the total number of the at least two links is n, x can be a positive integer not greater than n; x can also be an integer greater than 1 and not greater than n, that is, the first link is not the first link in the at least two links link to backoff slot 0.

Taking the first link as an example from the last link to backoff time slot 0 in the at least two links, the moment when the condition of starting PPDU transmission at the same time is satisfied is: the time slot boundary of the backoff time slot 0 of the first link ( end of backoff slot 0).

That is, step 510 can also be described as: at the time slot boundary (end time slot boundary) of backoff time slot 0 of the first link, start to transmit PPDU1 on the first link, wherein, the first link is at least two The last link among the links that arrives at backoff time slot 0 is the time slot boundary of backoff time slot 0 of the first link at the first moment.

Exemplarily, the first PPDU (PPDU1) is transmitted on the first link, and the second PPDU (PPDU2) is transmitted on the second link. The data contained in the first PPDU and the second PPDU may be the same or different.

Step 220: Ignoring the channel state of the second link from the first moment to the second moment, determine whether the second link among the at least two links starts to transmit the PPDU at the second moment.

Wherein, the second link is any link different from the first link among the at least two links, and the second moment is not earlier than the first moment.

Exemplarily, the first link may be any one of the at least two links, and the second link may be any one of the at least two links that is different from the first link.

Each link corresponds to a channel. Monitor the channel corresponding to the link through each link to obtain the monitoring result. The first link monitors one channel, and the second link monitors the second channel. The first channel and the second channel are Two different channels. The monitoring results include channel idle and channel busy.

When the second moment is equal to the first moment, the first link and the second link start to transmit PPDUs at the same time.

In the case that the second moment is later than the first moment, the first link starts to transmit the PPDU first, and the second link starts to transmit the PPDU later. Exemplarily, this embodiment describes the situation that the second moment is later than the first moment.

The second moment is the moment when the second link starts to transmit PPDU. The second moment is determined according to the third moment. The third moment is the moment when the third link starts to transmit PPDU. The third link is at least two links The first link to start transmitting PPDUs. Exemplarily, the aforementioned third link may be the first link, that is, the third moment may be equal to the first moment.

Taking the first link as an example where the first link starts to transmit the PPDU among the at least two links, the second moment is a moment after the first moment and the distance from the first moment is less than a time threshold. That is, the difference between the second moment and the first moment is smaller than the time threshold. The time threshold may be 4 μs.

Exemplarily, since it is determined at the first moment to transmit the PPDU on the first link, at this moment, the PPDU transmission on the second link is triggered, then, the moment when the second link sends the PPDU will have a certain time with the first moment Delay, the time delay needs to be controlled within a time threshold (for example, 4 μs). Based on this, the second moment can be: a moment within 4 μs from the first moment. The second moment may also be: determine whether the time slot boundary of the time domain resource corresponding to the second link is included within 4 μs after the first moment, and if the time slot boundary is included, the second moment is the time slot boundary corresponding to the second link. If the time slot boundary of the domain resource does not include the time slot boundary, the second moment is a moment within 4 μs after the first moment.

As shown in Figure 5, since the at least two links perform EDCA backoff independently, and the time references of each link are different, the time slots in the time domain resources corresponding to each link are not completely aligned. Therefore, the same Time domain resources in different links may belong to different time slots.

Based on this, taking the first time slot belonging to the first time slot in the time domain resource of the second link as an example, as shown in FIG. In the case where the slot boundary) is less than 4 μs, the second moment may be the slot boundary of the first time slot. As shown in FIG. 8 , in the case that the first moment is more than 4 μs away from the slot boundary of the first time slot, the second moment may be a moment in the first time slot within 4 μs after the first moment. Certainly, as shown in FIG. 11, when the first moment is less than 4 μs from the time slot boundary (the time slot boundary at which the time slot ends) of the first time slot, the second moment may also be from the first moment to the first time slot. A moment in the slot boundary of a slot.

Optionally, "ignoring" can also be referred to as "not considering", "not detecting" or "not referring".

Exemplarily, ignoring the channel state of the second link from the first moment to the second moment includes two situations: one is not monitoring the channel state of the second link from the first moment to the second moment; the other is to detect the channel state of the second link from the first moment to the second moment The channel state of the second link from the first moment to the second moment does not refer to the channel state.

Ignoring the channel state of the second link from the first moment to the second moment, determine whether the second link of the at least two links starts to transmit the PPDU at the second moment, that is, from the first moment to the second moment The channel state of the second link does not affect whether the second link starts to transmit PPDUs.

To sum up, in the method provided by this embodiment, after multiple links meet the conditions for simultaneous transmission of PPDUs, the second link that starts to transmit PPDUs later, by ignoring the first link that starts to transmit PPDUs earlier, the channel state , and then determine whether to start transmitting PPDUs. It is avoided that the second link detects that the channel is busy due to the first link starting to transmit, causing the second link to wrongly judge the channel state and fail to transmit the PPDU normally. Through this method, the mutual influence of simultaneous transmission of multiple links is reduced, and STA MLD and/or AP MLD can realize simultaneous data transmission on multiple links, so as to achieve advantages such as high throughput and low delay.

Exemplarily, taking the first link as an example where the first link starts to transmit PPDUs among the at least two links, and the first moment belongs to the first time slot in the time domain resource corresponding to the second link, The second moment is later than the first moment, and the second moment belongs to the first time slot. The second moment may be a time slot boundary of the first time slot, or the second moment may be a time within the first time slot.

Then for "ignoring the channel state of the second link from the first moment to the second moment, determining whether to start transmitting PPDUs on the second link of the at least two links at the second moment", given Here are several exemplary real-time examples:

1. Ignore the channel state of the second link before the second moment in the first time slot:

1.1 Do not monitor the channel state of the second link before the second moment in the first time slot;

1.2 Monitor the channel state of the second link before the second moment in the first time slot, but not use it.

2. Use the channel state of the second link before the first moment in the first time slot, and ignore the channel state of the second link from the first moment to the second moment:

2.1 monitor the channel state of the second link before the first moment in the first time slot, and adopt;

2.2 Monitor the channel state of the second link before the first moment in the first time slot, and adopt; and not monitor the channel state of the second link from the first moment to the second moment.

2.3 Monitor the channel state of the second link before the first moment in the first time slot, and use it; and monitor the channel state of the second link from the first moment to the second moment, and not use it.

Wherein, the above "adopt" refers to adopting the monitoring result to determine whether to transmit the PPDU on the second link, and "not adopting" refers to not adopting the monitoring result to determine whether to transmit the PPDU on the second link.

The method of the present application is described below by taking the above five embodiments as examples. Of course, the present application is not limited to the above five embodiments, and those skilled in the art can obtain other embodiments based on the design idea of the present application.

1. Ignore the channel state of the second link before the second moment in the first time slot:

Please refer to FIG. 12 , which shows a flowchart of a multi-link communication method provided by an embodiment of the present application. The method may be executed by a first multi-link device. For example, the first multi-link device is any MLD in the communication system shown in FIG. 1 , and the MLD is a station MLD or an access point MLD. Based on the exemplary embodiment shown in FIG. 10 , step 220 includes step 221 .

Step 221: Ignore the channel state of the second link from the first moment to the second moment, and ignore the channel state of the second link before the first moment in the first time slot, and at the second moment in at least two links The second link starts to transmit PPDU.

Exemplarily, while ignoring the channel state of the second link from the first moment to the second moment, the channel state of the second link before the first moment in the first time slot is ignored, that is, the channel state of the second link in the first time slot is ignored The channel state of the second link before the second moment.

On NSTR links, when multiple links meet the conditions for starting PPDU transmission at the same time, if the time point of starting PPDU transmission on a link is later than that of other links, the link starts transmission at the time point The channel state is not detected, that is, the link directly starts to transmit PPDU at this point in time.

Among them, ignoring can be realized in the following two ways: "not monitoring" and "not using after monitoring".

1.1 Do not monitor the channel state of the second link before the second moment in the first time slot.

Please refer to FIG. 13 , which shows a flowchart of a multi-link communication method provided by an embodiment of the present application. The method may be executed by a first multi-link device. For example, the first multi-link device is any MLD in the communication system shown in FIG. 1 , and the MLD is a station MLD or an access point MLD. Based on the exemplary embodiment shown in Fig. 12, step 221 includes step 221-1.

Step 221-1: Stop monitoring the channel state of the second link before the second moment in the first time slot, and without monitoring the channel state of the second link before the second moment in the first time slot, at the second At a time, a second link of the at least two links starts to transmit a PPDU.

That is, before the second moment in the first time slot, the MLD does not monitor the channel state of the second link, and directly starts to transmit the PPDU on the second link at the second moment.

1.2 Monitor the channel state of the second link before the second moment in the first time slot, but not use it.

Please refer to FIG. 14 , which shows a flowchart of a multi-link communication method provided by an embodiment of the present application. The method may be executed by a first multi-link device. For example, the first multi-link device is any MLD in the communication system shown in FIG. 1 , and the MLD is a station MLD or an access point MLD. Based on the exemplary embodiment shown in FIG. 12, step 221 includes step 221-2.

Step 221-2: Monitor the channel status of the second link before the second moment in the first time slot, and obtain the first monitoring result; no matter whether the first monitoring result is the channel idle or the channel is busy, at the second moment, at least two links in the second link The second link in the path starts transmitting PPDUs.

That is, before the second moment in the first time slot, the MLD monitors the channel status of the second link, but no matter whether the detection result is the channel is idle or the channel is busy, the MLD starts to transmit PPDUs on the second link at the second moment.

As shown in Figure 15, link2/STA2 needs to start transmitting PPDUs before the slot boundary. At this point in time (the second moment), link2/STA2 will ignore the channel status before the second moment, that is, link2/STA2 STA2 directly starts transmitting the PPDU at the second moment.

As another example, as shown in Figure 16, link2/STA2 needs to start transmitting PPDUs at the slot boundary. At the time point (second moment) when the transmission is started, link2/STA2 will ignore the channel state before this time point, that is, link2 /STA2 directly starts transmitting PPDU at this point in time.

2. Use the channel state of the second link before the first moment in the first time slot, and ignore the channel state of the second link from the first moment to the second moment:

On NSTR links, when multiple links meet the conditions for starting PPDU transmission at the same time, if the time point of starting PPDU transmission on a link is later than that of other links, the link starts transmission at the time point You need to check the channel status according to the following rules:

1) This link needs to divide the time needed to detect the channel state into two parts before the time point when the transmission is started: the first part is the time when other links have not started transmission, and the latter part is the time when other links have started transmission the time of transmission;

2) If the channel is detected to be busy in the previous part, the PPDU transmission on this link cannot be started;

3) If the channel is detected to be idle in the previous part, no matter whether the channel detection in the latter part is idle or not, the link can directly start to transmit PPDU.

Based on the above rules, the following three exemplary embodiments are given.

2.1 Monitor the channel state of the second link before the first moment in the first time slot, and use it.

Please refer to FIG. 17 , which shows a flowchart of a multi-link communication method provided by an embodiment of the present application. The method may be executed by a first multi-link device. For example, the first multi-link device is any MLD in the communication system shown in FIG. 1 , and the MLD is a station MLD or an access point MLD. Based on the exemplary embodiment shown in FIG. 10 , step 220 includes step 222 .

Step 222: Monitor the channel state of the second link before the first moment in the first time slot to obtain a second monitoring result; ignore the channel state of the second link from the first moment to the second moment; according to the second monitoring result, It is determined whether to start transmitting PPDUs on a second link of the at least two links at a second time.

That is, before the first moment in the first time slot, the MLD monitors the channel state of the second link, does not consider the channel state of the second link from the first moment to the second moment, and determines only based on the channel state before the first moment Whether to start transmitting PPDUs on the second link.

Exemplarily, when the second monitoring result is that the channel is idle, the second link among the at least two links starts to transmit PPDU at the second moment; The second of the two links transmits PPDUs.

For example, as shown in Figure 8, monitor the channel status of link2/STA2 before the first moment in the first time slot, and obtain the second detection result. STA2 starts to transmit the PPDU; if the second monitoring result is that the channel is busy, the link2/STA2 does not transmit the PPDU.

2.2 Monitor the channel state of the second link before the first moment in the first time slot, and adopt; and not monitor the channel state of the second link from the first moment to the second moment.

Please refer to FIG. 18 , which shows a flowchart of a multi-link communication method provided by an embodiment of the present application. The method can be executed by the first multi-link device, for example, the first multi-link device is any MLD in the communication system shown in Fig. 1, and the MLD is a station MLD or an access point MLD. Based on the exemplary embodiment shown in FIG. 10 , step 220 includes step 222 .

Step 223: Monitor the channel state of the second link before the first moment in the first time slot to obtain the second monitoring result; stop monitoring the channel state of the second link between the first moment and the second moment; according to the second monitoring As a result, it is determined whether to start transmitting PPDUs on a second link of the at least two links at a second time instant.

That is, before the first moment in the first time slot, the MLD monitors the channel state of the second link, and does not monitor the channel state of the second link between the first moment and the second moment in the first time slot, only based on the first time slot The channel state a moment ago determines whether to start transmitting PPDUs on the second link.

Exemplarily, when the second monitoring result is that the channel is idle, the second link among the at least two links starts to transmit PPDU at the second moment; The second of the two links transmits PPDUs.

For example, as shown in Figure 8, monitor the channel status of link2/STA2 before the first moment in the first time slot, and obtain the second detection result. STA2 starts to transmit the PPDU; if the second monitoring result is that the channel is busy, the link2/STA2 does not transmit the PPDU.

2.3 Monitor the channel state of the second link before the first moment in the first time slot, and use it; and monitor the channel state of the second link from the first moment to the second moment, and not use it.

Please refer to FIG. 19 , which shows a flowchart of a multi-link communication method provided by an embodiment of the present application. The method may be executed by a first multi-link device. For example, the first multi-link device is any MLD in the communication system shown in FIG. 1 , and the MLD is a station MLD or an access point MLD. Based on the exemplary embodiment shown in FIG. 10 , step 220 includes step 222 .

Step 224: Monitor the channel state of the second link before the first moment in the first time slot to obtain a second monitoring result; monitor the channel state of the second link between the first moment and the second moment in the first time slot, Obtaining a third monitoring result; regardless of whether the third monitoring result is channel busy or channel idle, according to the second monitoring result, determine whether the second link among the at least two links starts to transmit PPDU at the second moment.

That is, before the first moment in the first time slot, the MLD monitors the channel state of the second link, monitors the channel state of the second link between the first moment and the second moment in the first time slot, based on the channel state It is determined whether to start transmitting PPDUs on the second link.

Exemplarily, when the second monitoring result is that the channel is idle, no matter whether the third monitoring result is the channel is busy or the channel is idle, at the second moment, the second link among the at least two links starts to transmit the PPDU; When the second monitoring result is that the channel is busy, no matter whether the third monitoring result is the channel is busy or the channel is idle, the PPDU is not transmitted on the second link of the at least two links.

For example, as shown in Figure 8, monitor the channel state of link2/STA2 before the first moment in the first time slot to obtain the second monitoring result; monitor the channel status of link2/STA2 between the first moment and the second moment in the first time slot channel state, get the third monitoring result; in the case that the second monitoring result is that the channel is idle, no matter whether the third monitoring result is the channel is busy or the channel is idle, at the second moment, link2/STA2 starts to transmit PPDU; in the second monitoring result When the channel is busy, no PPDU is transmitted on link2/STA2 no matter whether the third monitoring result is the channel is busy or the channel is idle.

As shown in Figure 20, link2/STA2 needs to expect to start transmitting PPDUs before the slot boundary. At this time point (the second moment) when it is expected to start transmitting, link2/STA1 starts to transmit PPDU1 in the time before link2/STA1 STA2 detects that the channel on link2 is busy, and then link2/STA2 will not start transmitting PPDU2 at the expected time point.

As shown in Figure 21, link2/STA2 needs to expect to start transmitting PPDUs before the slot boundary. At this time point (the second moment) when link1/STA1 starts transmitting PPDU1, link2/STA1 expects to start transmitting PPDU1. STA2 detects that the channel on link2 is idle; even if link2/STA2 detects that the channel is busy between link1/STA1 starting to transmit PPDU1 (first moment) and the expected start transmission time (second moment), link2/STA2 Transmission of PPDU2 will still be initiated at the expected point in time.

As shown in Figure 22, link2/STA2 needs to expect to start transmitting PPDUs at the time point of the slot boundary. At this expected time point (second moment), before link1/STA1 starts transmitting PPDU1, link2/STA2 detects that the channel on link2 is busy, then link2/STA2 will not start to transmit PPDU2 at the expected time point.

As shown in Figure 23, link2/STA2 needs to expect to start transmitting PPDU at the time point of slot boundary. At this time point (second moment) when it is expected to start transmission, in the time before link1/STA1 starts transmitting PPDU1, link2/STA2 detects that the channel on link2 is idle; even if link2/STA2 detects that the channel is busy between link1/STA1 starts transmitting PPDU1 (the first moment) and the expected start transmission time (the second moment), link2 /STA2 will still start transmitting PPDU2 at the expected point in time.

To sum up, in the method provided by this embodiment, on NSTR links, when multiple links meet the conditions for starting PPDU transmission at the same time, if the time point of starting PPDU transmission on a certain link is later than other links When the link is on the road, the link does not detect the channel state at the time when the transmission is started; or, on NSTR links, when multiple links meet the conditions for starting to transmit PPDU at the same time, if a link starts to transmit PPDU When the time point of the link is later than that of other links, this link only needs to check the channel status in the time before other links start transmission at the time point of starting transmission.

The method provided by this embodiment improves the current 802.11be protocol, when starting PPDU transmission on NSTR links at the same time, the detection mechanism for the channel state; it can make the NSTR MLD on the NSTR links solve the problem of "due to the gap between the devices between the links". The existence of interference makes the link that transmits the PPDU first set the channel status of other links as busy". And in this case, the method can prevent a certain link from being wrongly set the channel state due to the interference between the devices, which leads to the situation that the packet cannot be sent, and improves the utilization rate of the air interface.

The following are device embodiments of the present application, which can be used to implement the method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

Please refer to FIG. 24 , which shows a block diagram of a multi-link communication device provided by an embodiment of the present application. The device has the function of realizing the above method example, and the function may be realized by hardware, or may be realized by executing corresponding software by hardware. The apparatus may be the first multi-link device introduced above, and the multi-link device is a station MLD or an access point MLD. There are at least two links connected between the first multi-link device and the second multi-link device, and the at least two links are links that cannot be sent and received at the same time; the device includes:

The transmission module 301 is configured to start transmitting the PPDU on the first link of the at least two links at the first moment when the at least two links meet the condition of simultaneously starting the transmission of the physical layer protocol packet unit PPDU ;

A monitoring module 302, configured to ignore the channel state of the second link from the first moment to the second moment;

The transmission module 301 is configured to determine whether to start transmitting PPDUs on the second link of the at least two links at the second moment;

Wherein, the second link is any link in the at least two links that is different from the first link, and the second moment is not earlier than the first moment.

In an optional embodiment, the first link is the first link of the at least two links that starts to transmit PPDU; the first moment is in the time domain corresponding to the second link The resource belongs to the first time slot;

The monitoring module 302 is configured to ignore the channel state of the second link from the first moment to the second moment, and ignore the channel of the second link before the first moment in the first time slot state.

In an optional embodiment, the second moment belongs to the first time slot;

The monitoring module 302 is configured to stop monitoring the channel state of the second link before the second moment in the first time slot;

The transmission module 301 is configured to, without monitoring the channel state of the second link before the second moment in the first time slot, at the second moment in the at least two links The second link in the path starts to transmit PPDUs.

In an optional embodiment, the second moment belongs to the first time slot;

The monitoring module 302 is configured to monitor the channel state of the second link before the second moment in the first time slot, and obtain a first monitoring result;

The transmission module 301 is configured to start transmitting PPDUs on the second link of the at least two links at the second moment regardless of whether the first monitoring result is channel idle or channel busy.

In an optional embodiment, the first link is the first link of the at least two links that starts to transmit PPDU; the first moment is in the time domain corresponding to the second link The resource belongs to the first time slot;

The monitoring module 302 is configured to monitor the channel state of the second link before the first moment in the first time slot, and obtain a second monitoring result; ignoring the second link from the first moment to the second moment The channel state of the second link;

The transmission module 301 is configured to determine whether the second link among the at least two links starts to transmit PPDU at the second moment according to the second monitoring result.

In an optional embodiment, the transmission module 301 is configured to, when the second monitoring result is that the channel is idle, at the second moment, the second link in the at least two links The second link starts to transmit PPDU.

In an optional embodiment, the transmission module 301 is configured to not transmit PPDUs on the second link of the at least two links when the second monitoring result is that the channel is busy.

In an optional embodiment, the first link is the first link of the at least two links that starts to transmit PPDU; the first moment is in the time domain corresponding to the second link The resource belongs to the first time slot; the second moment belongs to the first time slot;

The monitoring module 302 is configured to monitor the channel state of the second link before the first moment in the first time slot, and obtain a second monitoring result;

The monitoring module 302 is configured to monitor the channel state of the second link between the first moment and the second moment in the first time slot, and obtain a third monitoring result;

The transmission module 301 is configured to determine whether the channel in the at least two links is at the second moment according to the second monitoring result, regardless of whether the third monitoring result is channel busy or channel idle. The second link starts transmitting PPDUs.

In an optional embodiment, the transmission module 301 is configured to, when the second monitoring result is that the channel is idle, no matter whether the third monitoring result is the channel is busy or the channel is idle, in the second At a time, the second link of the at least two links starts to transmit a PPDU.

In an optional embodiment, the transmission module 301 is configured to, when the second monitoring result is that the channel is busy, no matter whether the third monitoring result is the channel is busy or the channel is idle, The second link of the links transmits PPDUs.

In an optional embodiment, the first link is the first link of the at least two links that starts to transmit PPDU; the first moment is in the time domain corresponding to the second link The resource belongs to the first time slot; the second moment belongs to the first time slot;

The monitoring module 302 is configured to monitor the channel state of the second link before the first moment in the first time slot, and obtain a second monitoring result;

The monitoring module 302 is configured to stop monitoring the channel state of the second link between the first moment and the second moment;

The transmission module 301 is configured to determine whether the second link among the at least two links starts to transmit PPDU at the second moment according to the second monitoring result.

In an optional embodiment, the transmission module 301 is configured to, when the second monitoring result is that the channel is idle, at the second moment, the second link in the at least two links The second link starts to transmit PPDU.

In an optional embodiment, the transmission module 301 is configured to not transmit PPDUs on the second link of the at least two links when the second monitoring result is that the channel is busy.

In an optional embodiment, the second moment is a moment in the first time slot.

In an optional embodiment, the second moment is a time slot boundary of the first time slot.

In an optional embodiment, the difference between the second moment and the first moment is smaller than a time threshold.

It should be noted that when the device provided by the above embodiment realizes its functions, it only uses the division of the above-mentioned functional modules as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.

Regarding the apparatus in the foregoing embodiments, the specific manner in which each module executes operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

Please refer to FIG. 25 , which shows a schematic structural diagram of a multi-link device provided by an embodiment of the present application. The multi-link device may include: a processor 1101 , a receiver 1102 , a transmitter 1103 , a memory 1104 and a bus 1105 .

The processor 1101 includes one or more processing cores, and the processor 1101 executes various functional applications and multi-link communication by running software programs and modules.

The receiver 1102 and the transmitter 1103 can be realized as a transceiver 1106, and the transceiver 1106 can be a communication chip.

The memory 1104 is connected to the processor 1101 through the bus 1105 .

The memory 1104 may be used to store a computer program, and the processor 1101 is used to execute the computer program, so as to implement various steps performed by the terminal device in the foregoing method embodiments.

In addition, the memory 1104 can be realized by any type of volatile or non-volatile storage device or their combination, and the volatile or non-volatile storage device includes but not limited to: random-access memory (Random-Access Memory, RAM) And read-only memory (Read-Only Memory, ROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, EPROM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), flash memory or other solid-state storage technologies, compact disc read-only memory (CD-ROM), high-density digital video disc (Digital Video Disc, DVD) or other optical storage, tape cartridges, tapes, disks storage or other magnetic storage devices.

The processor and the transceiver involved in the embodiment of the present application may execute the steps performed by the multi-link device in any of the methods shown in FIG. 10 , FIGS. 12-14 , and 17-19 above, and details are not repeated here.

An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is configured to be executed by a processor of a multi-link device, so as to implement the foregoing multi-link communication method.

Optionally, the computer-readable storage medium may include: a read-only memory (Read-Only Memory, ROM), a random-access memory (Random-Access Memory, RAM), a solid-state hard drive (Solid State Drives, SSD) or an optical disc. Wherein, the random access memory may include resistive random access memory (Resistance Random Access Memory, ReRAM) and dynamic random access memory (Dynamic Random Access Memory, DRAM).

The embodiment of the present application also provides a chip, the chip includes a programmable logic circuit and/or program instructions, and when the chip runs on a multi-link device, it is used to implement the above-mentioned multi-link communication method.

An embodiment of the present application also provides a computer program product or computer program, where the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and the processor of the multi-link device reads from the The computer-readable storage medium reads and executes the computer instructions, so as to implement the above-mentioned multi-link communication method.

The processor in this embodiment of the present application includes: an application specific integrated circuit (Application Specific Integrated Circuit, ASIC).

It should be understood that the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.

The "plurality" mentioned herein means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. The character "/" generally indicates that the contextual objects are an "or" relationship.

In addition, the numbering of the steps described herein only exemplarily shows a possible sequence of execution among the steps. In some other embodiments, the above-mentioned steps may not be executed according to the order of the numbers, such as two different numbers The steps are executed at the same time, or two steps with different numbers are executed in the reverse order as shown in the illustration, which is not limited in this embodiment of the present application.

Those skilled in the art should be aware that, in the foregoing one or more examples, the functions described in the embodiments of the present application may be implemented by hardware, software, firmware or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above are only exemplary embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the protection of the application. within range.

Claims (36)

1. A multi-link communication method, characterized in that the method is executed by a first multi-link device, and at least two links are connected between the first multi-link device and the second multi-link device, so The at least two links are links that cannot be sent and received at the same time; the method includes:

   When the at least two links meet the condition of simultaneously starting the transmission of the physical layer protocol packet unit PPDU, at the first moment, the first link of the at least two links starts to transmit the PPDU;

   ignoring the channel state of the second link from the first moment to the second moment;

   determining whether to start transmitting PPDUs on said second link of said at least two links at said second time instant;

   Wherein, the second link is any link in the at least two links that is different from the first link, and the second moment is not earlier than the first moment.
2. The method according to claim 1, wherein the first link is the first link of the at least two links that starts to transmit PPDUs; The corresponding time domain resources belong to the first time slot; the ignoring the channel state of the second link from the first moment to the second moment includes:

   ignoring the channel state of the second link from the first moment to the second moment, and ignoring the channel state of the second link before the first moment in the first time slot.
3. The method according to claim 2, wherein the second moment belongs to the first time slot;

   The ignoring the channel state of the second link from the first moment to the second moment, and ignoring the channel state of the second link before the first moment in the first time slot includes:

   stop monitoring the channel state of the second link before the second moment in the first time slot;

   The determining whether to start transmitting PPDUs on the second link of the at least two links at the second moment includes:

   In the case of not monitoring the channel state of the second link before the second moment in the first time slot, the second link among the at least two links at the second moment The road starts to transmit PPDU.
4. The method according to claim 2, wherein the second moment belongs to the first time slot;

   The ignoring the channel state of the second link from the first moment to the second moment; and ignoring the channel state of the second link before the first moment in the first time slot; determining whether to At the second moment, the second link in the at least two links starts to transmit PPDUs, including:

   monitoring the channel state of the second link before the second moment in the first time slot to obtain a first monitoring result;

   Whether the first monitoring result is the channel is idle or the channel is busy, at the second moment, the second link among the at least two links starts to transmit PPDUs.
5. The method according to claim 1, wherein the first link is the first link of the at least two links that starts to transmit PPDUs; The corresponding time domain resources belong to the first time slot;

   The ignoring the channel state of the second link from the first moment to the second moment includes:

   monitoring the channel state of the second link before the first moment in the first time slot to obtain a second monitoring result;

   ignoring the channel state of the second link from the first moment to the second moment;

   The determining whether to start transmitting PPDUs on the second link of the at least two links at the second moment includes:

   According to the second monitoring result, it is determined whether the second link among the at least two links starts to transmit PPDU at the second moment.
6. The method according to claim 5, wherein, according to the second monitoring result, it is determined whether the second link of the at least two links starts to transmit PPDU at the second moment ,include:

   If the second monitoring result is that the channel is idle, at the second moment, the second link among the at least two links starts to transmit PPDUs.
7. The method according to claim 5, wherein, according to the second monitoring result, it is determined whether the second link of the at least two links starts to transmit PPDU at the second moment ,include:

   If the second monitoring result is that the channel is busy, no PPDU is transmitted on the second link of the at least two links.
8. The method according to claim 1, wherein the first link is the first link of the at least two links that starts to transmit PPDUs; The corresponding time domain resource belongs to the first time slot; the second moment belongs to the first time slot;

   The ignoring the channel state of the second link from the first moment to the second moment, and determining whether to start transmitting PPDUs on the second link of the at least two links at the second moment, includes :

   monitoring the channel state of the second link before the first moment in the first time slot to obtain a second monitoring result;

   monitoring the channel state of the second link between the first moment and the second moment in the first time slot to obtain a third monitoring result;

   Regardless of whether the third monitoring result is the channel is busy or the channel is idle, it is determined whether the second link among the at least two links starts to transmit PPDU at the second moment according to the second monitoring result.
9. The method according to claim 8, wherein regardless of whether the third monitoring result is channel busy or channel idle, it is determined whether at the second moment in the at least two channels according to the second monitoring result. The second link in the links starts to transmit PPDUs, including:

   In the case that the second monitoring result is the channel is idle, regardless of whether the third monitoring result is the channel is busy or the channel is idle, the second link among the at least two links at the second moment Start transmitting PPDUs.
10. The method according to claim 8, wherein regardless of whether the third monitoring result is channel busy or channel idle, it is determined whether at the second moment in the at least two channels according to the second monitoring result. The second link in the links starts to transmit PPDUs, including:

    If the second monitoring result is that the channel is busy, no matter whether the third monitoring result is the channel is busy or the channel is idle, no PPDU is transmitted on the second link of the at least two links.
11. The method according to claim 1, wherein the first link is the first link of the at least two links that starts to transmit PPDUs; The corresponding time domain resource belongs to the first time slot; the second moment belongs to the first time slot;

    The ignoring the channel state of the second link from the first moment to the second moment includes:

    monitoring the channel state of the second link before the first moment in the first time slot to obtain a second monitoring result;

    Stop monitoring the channel state of the second link between the first moment and the second moment;

    The determining whether to start transmitting PPDUs on the second link of the at least two links at the second moment includes:

    According to the second monitoring result, it is determined whether the second link among the at least two links starts to transmit PPDU at the second moment.
12. The method according to claim 11, wherein, according to the second monitoring result, it is determined whether the second link of the at least two links starts to transmit PPDU at the second moment ,include:

    If the second monitoring result is that the channel is idle, at the second moment, the second link among the at least two links starts to transmit PPDUs.
13. The method according to claim 11, wherein, according to the second monitoring result, it is determined whether the second link of the at least two links starts to transmit PPDU at the second moment ,include:

    If the second monitoring result is that the channel is busy, no PPDU is transmitted on the second link of the at least two links.
14. The method according to any one of claims 2 to 13, wherein the second moment is a moment within the first time slot.
15. The method according to any one of claims 2 to 13, wherein the second moment is a time slot boundary of the first time slot.
16. The method according to any one of claims 1 to 13, wherein the difference between the second moment and the first moment is smaller than a time threshold.
17. A multi-link communication device, characterized in that at least two links are connected between the first multi-link device and the second multi-link device, and the at least two links are links that cannot be sent and received at the same time; Said devices include:

    A transmission module, configured to start transmitting PPDUs on the first link of the at least two links at a first moment when the at least two links meet the condition of starting physical layer protocol packet unit PPDU transmission at the same time;

    A monitoring module, configured to ignore the channel state of the second link from the first moment to the second moment;

    The transmission module is configured to determine whether to start transmitting PPDUs on the second link of the at least two links at the second moment;

    Wherein, the second link is any link in the at least two links that is different from the first link, and the second moment is not earlier than the first moment.
18. The device according to claim 17, wherein the first link is the first link of the at least two links that starts to transmit PPDUs; The corresponding time domain resources belong to the first time slot;

    The monitoring module is configured to ignore the channel state of the second link from the first moment to the second moment, and ignore the channel state of the second link before the first moment in the first time slot .
19. The device according to claim 18, wherein the second moment belongs to the first time slot;

    The monitoring module is configured to stop monitoring the channel state of the second link before the second moment in the first time slot;

    The transmission module is configured to, without monitoring the channel state of the second link before the second moment in the first time slot, at the second moment in the at least two links The second link in starts transmitting PPDUs.
20. The device according to claim 18, wherein the second moment belongs to the first time slot;

    The monitoring module is configured to monitor the channel state of the second link before the second moment in the first time slot, and obtain a first monitoring result;

    The transmission module is configured to start transmitting PPDUs on the second link of the at least two links at the second moment regardless of whether the first monitoring result is channel idle or channel busy.
21. The device according to claim 17, wherein the first link is the first link of the at least two links that starts to transmit PPDUs; The corresponding time domain resources belong to the first time slot;

    The monitoring module is configured to monitor the channel state of the second link before the first moment in the first time slot, and obtain a second monitoring result; ignoring the second link from the first moment to the second moment The channel state of the link;

    The transmission module is configured to determine whether the second link among the at least two links starts to transmit PPDU at the second moment according to the second monitoring result.
22. The device according to claim 21, wherein the transmission module is configured to, when the second monitoring result is that the channel is idle, at the second moment in the at least two links The second link starts to transmit PPDUs.
23. The device according to claim 21, wherein the transmission module is configured to, when the second monitoring result is that the channel is busy, the second link that is not in the at least two links Transmit PPDUs.
24. The device according to claim 17, wherein the first link is the first link of the at least two links that starts to transmit PPDUs; The corresponding time domain resource belongs to the first time slot; the second moment belongs to the first time slot;

    The monitoring module is configured to monitor the channel state of the second link before the first moment in the first time slot, and obtain a second monitoring result;

    The monitoring module is configured to monitor the channel state of the second link between the first moment and the second moment in the first time slot, and obtain a third monitoring result;

    The transmission module is configured to determine whether the second channel in the at least two links is at the second moment according to the second monitoring result, regardless of whether the third monitoring result is the channel is busy or the channel is idle. The second link starts to transmit PPDU.
25. The device according to claim 24, wherein the transmission module is configured to, when the second monitoring result is that the channel is idle, regardless of whether the third monitoring result is the channel is busy or the channel is idle, in the case At the second moment, the second link among the at least two links starts to transmit PPDUs.
26. The device according to claim 24, wherein the transmission module is configured to, when the second monitoring result is that the channel is busy, no matter whether the third monitoring result is the channel is busy or the channel is idle. The second link of the at least two links transmits PPDUs.
27. The device according to claim 17, wherein the first link is the first link of the at least two links that starts to transmit PPDUs; The corresponding time domain resource belongs to the first time slot; the second moment belongs to the first time slot;

    The monitoring module is configured to monitor the channel state of the second link before the first moment in the first time slot, and obtain a second monitoring result;

    The monitoring module is configured to stop monitoring the channel state of the second link between the first moment and the second moment;

    The transmission module is configured to determine whether the second link among the at least two links starts to transmit PPDU at the second moment according to the second monitoring result.
28. The device according to claim 27, wherein the transmission module is configured to, when the second monitoring result is that the channel is idle, at the second moment in the at least two links The second link starts to transmit PPDUs.
29. The device according to claim 27, wherein the transmission module is configured to, when the second monitoring result is that the channel is busy, the second link that is not in the at least two links Transmit PPDUs.
30. The device according to any one of claims 18 to 29, wherein the second moment is a moment within the first time slot.
31. The device according to any one of claims 18 to 29, wherein the second moment is a time slot boundary of the first time slot.
32. The device according to any one of claims 17 to 29, wherein the difference between the second moment and the first moment is smaller than a time threshold.
33. A multi-link device, characterized in that the multi-link device includes a processor and a memory, at least one instruction, at least one program, code set or instruction set are stored in the memory, and the at least one instruction, the The at least one program, the code set or the instruction set is loaded and executed by the processor to implement the multi-link communication method according to any one of claims 1 to 16.
34. A computer-readable storage medium, wherein a computer program is stored in the storage medium, and the computer program is used to be executed by a processor to realize the multi-link according to any one of claims 1 to 16 communication method.
35. A chip, characterized in that the chip includes programmable logic circuits and/or program instructions, which are used to implement the multi-link communication method according to any one of claims 1 to 16 when the chip is running.
36. A computer program product or computer program, characterized in that the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and the processor reads the computer-readable storage medium from the computer-readable storage medium And execute the computer instructions to realize the multi-link communication method according to any one of claims 1 to 16.

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