WO2024027836A1 - Data transmission method and apparatus - Google Patents

Abstract

Provided in the embodiments of the present application are a data transmission method and apparatus. The method comprises: sending indication information to a second device, wherein the indication information comprises a first field and a second field, and the first field is used for instructing a first device to enable a first mode; and in the first mode, performing, on a first link, a frame exchange with the second device, wherein the second field is used for indicating whether to stop the frame exchange when a multicast frame is transmitted on a link other than the first link. By means of an indication of a second field, the stopping of a frame exchange caused by the transmission of a multicast frame can be effectively avoided or reduced, such that the system efficiency can be effectively improved.

Description

Data transmission method and device

This application claims priority to the Chinese patent application filed with the China Patent Office on August 5, 2022, with the application number 202210937960.5 and the application title "Data transmission method and device", the entire content of which is incorporated into this application by reference.

Technical field

The embodiments of the present application relate to communication technology, and in particular, to a data transmission method and device.

Background technique

Multi-Link Device (Multi-Link Device, MLD) is a device that supports data transmission on multiple links at the same time. Currently, there are non-Access Point (non-AP) MLDs that support EMLSR mode. , and there are also non-AP MLDs that support EMLMR mode.

Currently, non-AP MLD determines the EMLMR link set or EMLSR link set, and determines a specific link in the link set for frame exchange between multi-link devices. In the prior art, during frame exchange, radio frequency chains on other links in the link set are switched to a specific link used for frame exchange.

However, switching the radio frequency chain on other links to a specific link will cause the frame exchange of the specific link to be suspended when other links need to receive multicast frames, thereby reducing system efficiency.

Contents of the invention

Embodiments of the present application provide a data transmission method and device to overcome the problem of frame exchange being suspended, thereby reducing system efficiency.

In a first aspect, embodiments of the present application provide a data transmission method, applied to a first device, wherein at least two links are established between the first device and the second device, including:

Send instruction information to the second device, where the instruction information includes a first field and a second field, the first field is used to instruct the first device to enable a first mode, and the first mode is as follows One of: enhanced multi-link single radio frequency EMLSR mode, enhanced multi-link multi-radio EMLMR mode;

In the first mode, frames are exchanged with the second device on the first link, and the second field is used to indicate the existence of multicast frame transmission on a link other than the first link. , whether to abort the frame exchange.

In a second aspect, embodiments of the present application provide a data transmission method applied to a second device, wherein at least two links are established between the second device and the first device, including:

Receive indication information sent by the first device, wherein the indication information includes a first field and a second field, the first field is used to indicate that the first device enables the first mode, and the first The mode is one of the following: enhanced multi-link single radio frequency EMLSR mode, enhanced multi-link multi-radio EMLMR mode;

In the first mode, frames are exchanged with the first device on the first link, and the second field is used to indicate the existence of multicast frame transmission on a link other than the first link. , whether to abort the frame exchange.

In a third aspect, embodiments of the present application provide a data transmission device, including:

A sending module, configured to send indication information to the second device, wherein the indication information includes a first field and a second field, the first field is used to indicate that the first device enables the first mode, and the The first mode is as One of the following: enhanced multi-link single radio frequency EMLSR mode, enhanced multi-link multi-radio EMLMR mode;

A processing module configured to exchange frames with the second device on the first link in the first mode, and the second field is used to indicate that on a link other than the first link Whether to abort the frame exchange when there is multicast frame transmission.

In a fourth aspect, embodiments of the present application provide a data transmission device, including:

A receiving module, configured to receive indication information sent by the first device, wherein the indication information includes a first field and a second field, and the first field is used to instruct the first device to enable the first mode. , the first mode is one of the following: enhanced multi-link single radio frequency EMLSR mode, enhanced multi-link multi-radio frequency EMLMR mode;

A processing module configured to exchange frames with the first device on the first link in the first mode, and the second field is used to indicate that on a link other than the first link Whether to abort the frame exchange when there is multicast frame transmission.

In a fifth aspect, embodiments of the present application provide a data transmission device, including:

Memory, used to store programs;

A processor configured to execute the program stored in the memory. When the program is executed, the processor is configured to execute the method described in the first aspect above.

In a sixth aspect, embodiments of the present application provide a data transmission device, including:

Memory, used to store programs;

A processor configured to execute the program stored in the memory. When the program is executed, the processor is configured to execute the method described in the second aspect above.

In a seventh aspect, embodiments of the present application provide a chip including instructions. The chip includes a processor. The processor executes computer execution instructions, so that the processor executes the above first aspect and various possible aspects of the first aspect. design, as well as the second aspect and the method described in any of the various possible designs of the second aspect.

In an eighth aspect, embodiments of the present application provide a computer-readable storage medium, including instructions that, when run on a computer, cause the computer to execute the above first aspect and various possible designs of the first aspect, and the second aspect and the method described in any of the various possible designs of the second aspect.

In a ninth aspect, embodiments of the present application provide a computer program product, including a computer program that, when executed by a processor, implements the above first aspect and various possible designs of the first aspect, as well as the second aspect and the third aspect. Either of the two possible designs is described.

Embodiments of the present application provide a data transmission method and device. The method includes: sending indication information to a second device, where the indication information includes a first field and a second field, and the first field is used to indicate that the first device enables The first mode is one of the following: EMLSR mode, EMLMR mode. In the first mode, frames are exchanged with the second device on the first link, and the second field is used to indicate whether to terminate frame exchange when there is multicast frame transmission on a link other than the first link. By including the second field in the indication information, the second field may indicate whether in the first mode, when there is multicast frame transmission on a link other than the first link used for frame exchange, it is necessary to terminate the third field. Frame exchange in the first mode, through the indication of the second field, can effectively avoid or reduce the interruption of frame exchange caused by the transmission of multicast frames, thereby effectively improving system efficiency.

Description of drawings

Figure 1 is a schematic diagram of a communication scenario provided by an embodiment of the present application;

Figure 2 is a schematic diagram of links between multi-link devices provided by the embodiment of the present application;

Figure 3 is a schematic diagram of the format of the EML control field provided by the embodiment of the present application;

Figure 4 is a flow chart of a transmission method provided by an embodiment of the present application;

Figure 5 is a schematic diagram 1 of the implementation of data transmission in the first mode provided by the embodiment of the present application;

Figure 6 is a schematic diagram 2 of the implementation of data transmission in the first mode provided by the embodiment of the present application;

Figure 7 is a schematic diagram 3 of the implementation of data transmission in the first mode provided by the embodiment of the present application;

Figure 8 is a schematic diagram 4 of the implementation of data transmission in the first mode provided by the embodiment of the present application;

Figure 9 is a schematic diagram 5 of the implementation of data transmission in the first mode provided by the embodiment of the present application;

Figure 10 is a schematic structural diagram of a data transmission device provided by an embodiment of the present application;

Figure 11 is a schematic structural diagram 2 of a data transmission device provided by an embodiment of the present application;

Figure 12 is a schematic diagram 1 of the hardware structure of the data transmission device provided by the embodiment of the present application;

Figure 13 is a schematic diagram 2 of the hardware structure of the data transmission device provided by the embodiment of the present application.

Detailed ways

In order to better understand the technical solutions of this application, the relevant technologies involved in this application will be introduced in further detail below.

802.11be is the next generation WiFi standard. 802.11be network, also known as Extremely High Throughput (EHT, extremely high throughput) network, enhances functions through a series of system features and multiple mechanisms to achieve extremely high throughput. 802.11be is The new WLAN standard proposed after WiFi6 (802.11ax).

According to the definition of two communication ends in 802.11, one end is the AP device and the other end is the STA device. For example, the communication scenario can be understood in conjunction with Figure 1, which is a schematic diagram of the communication scenario provided by the embodiment of the present application. Referring to Figure 1, in this communication scenario, one end is an access point (Access Point, AP) device, and the other end is a station (Station, STA) device.

Among them, AP can be an access point running on a wired network for mobile users. It is mainly deployed in homes, buildings and campuses. The typical coverage radius is tens of meters to hundreds of meters. Of course, it can also be deployed outdoors. 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. Specifically, the AP may be a terminal device or network device with a wireless-fidelity (WiFi) chip. The AP can be a device that supports the 802.11ax standard. The AP can also be a device that supports multiple wireless local area networks (WLAN) standards such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

Among them, STA can be a wireless communication chip, a wireless sensor or a wireless communication terminal. For example, mobile phones that support WiFi communication function, tablet computers that support WiFi communication function, set-top boxes that support WiFi communication function, smart TVs that support WiFi communication function, smart wearable devices that support WiFi communication function, and vehicle-mounted communication devices that support WiFi communication function and computers that support WiFi communication functions. Optionally, STA can support the 802.11ax standard. STA can also support multiple WLAN standards such as 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.

In the actual implementation process, the specific implementation methods of the AP device and the STA device can be selected according to actual needs. This embodiment does not limit this, as long as the AP device can serve as an access point and the STA device can serve as a site.

Currently in 802.11be, the function that can support 802.11 multiple links (Multiple Links) is defined. Based on the above introduction, in multi-link communication, one end is AP MLD (access point multi-link device) and the other end is STA MLD (site multi-link device). Among them, STA MLD can also be called non- AP MLD (Multi-Link to Non-Access Point Devices).

And currently, Multi-Link Device (MLD) is introduced in 802.11be (EHT). MLD is a device that supports data transmission on multiple links at the same time. For example, it can communicate on the 2.4GHz, 5GHz and 6GHz frequency bands at the same time. Even when the number of antennas is limited, multi-link devices can switch between different frequency bands to select the best frequency band and ensure its communication quality. .

STA MLD and AP MLD that have established multi-links with each other can take advantage of multi-links to send and receive data on multiple links to achieve high throughput/low latency and other advantages.

Wherein, if the multi-link device is an AP device, the multi-link device may contain one or more APs; if the multi-link device is an STA device, the multi-link device may contain one or more STAs.

It can be understood that whether it is an STA multi-link device or an AP multi-link device, a multi-link device is essentially a device. The AP MLD introduced above can include one or more APs, and the STA MLD can include one or more Multiple STAs can be understood as a multi-link device that can include one or more virtual entities, in which each logical entity transmits data with the other end of the communication through a link. The link is a wireless resource used to transmit data. .

For example, the multi-links between AP MLD and non-AP MLD can be understood with reference to Figure 2. Figure 2 is a schematic diagram of links between multi-link devices provided by the embodiment of the present application.

As shown in Figure 2, assume that the AP MLD currently includes AP1, AP2,..., APn, and the non-AP MLD includes STA1, STA2,..., STAn, where a link is established between AP1 and STA1 )1, link 2 is established between AP2 and STA2,..., link n is established between APn and STAn. In a possible implementation, each AP can work on different frequency bands, and each STA can Working in different frequency bands, correspondingly, each link established is also a link in the corresponding frequency band. Data can be transmitted over multiple links.

In the actual implementation process, the specific number of APs included in the AP multi-link device and the specific number of STAs included in the STA multi-link device can be selected according to actual needs, and this embodiment does not limit this. .

Currently, the standard specifies two types of non-AP MLD:

Multi-Link Single Radio (MLSR) non-AP MLD, where MLSR non-AP MLD has only one radio and can only transmit data on one link at the same time;

Multi-Link Multi-Radio (MLMR) non-AP MLD, where MLMR non-AP MLD has multiple radios and can transmit data on multiple links at the same time.

Furthermore, the standard also specifies an MLSR non-AP MLD that supports enhanced multi-link single radio frequency EMLSR (Enhanced Multi-Link Single-Radio) mode.

Among them, non-AP MLD that supports EMLSR mode can send an enhanced multi-link operating mode notification frame (EML Operating Mode Notificaiton frame) to the AP MLD by setting the EMLSR Mode subfield (EMLSR Mode subfield) to 1. Instruct it to enable EMLSR mode. After receiving the EML Operating Mode Notificaiton frame replied by AP MLD, the EMLSR mode can be enabled.

In non-AP MLD, in EMLSR mode, each link is active:

And, the non-AP MLD listens on the set of EMLSR links indicated by the EMLSR Link Bitmap subfield every link in . Its essence is to modulate multiple radio frequency chains (Radio Frequency Chain, RF Chain) in Single Radio to these Links respectively.

When an initial control frame is received on a link, a corresponding reply is made after the Short Inter Frame Space (SIFS) time. Among them, the initial control frame can be a Multi-User Request To Send frame (MU-RTS) or a Buffer Status Report Poll frame (BSRP). When replying, reply Clear To Send (CTS) to MU-RTS, and reply Trigger Based PPDU with BSR to BSRP.

And, after SIFS, frame exchange within the EMLSR MIMO capability is performed on the link. At this time, the RF chain will switch to the link and stop monitoring on other links.

After the frame exchange stops, after the EMLSR Transition Delay time, each link in the EMLSR link set returns to the listening state. Among them, Transition Delay is an EMLSR parameter of non-AP MLD, which is notified to AP MLD in other signaling.

Also, the non-AP MLD can send an EML Operating Mode Notification frame to the AP MLD and set the EMLSR mode field to 0 to indicate that it wants to disable the EMLSR mode. After receiving the EML Operating Mode Notification frame replied by the AP MLD, it can Disable EMLSR mode.

Furthermore, the standard also specifies an MLMR non-AP MLD that supports enhanced multi-link multi-radio EMLMR (Enhanced Multi-Link Multi-Radio) mode.

Among them, non-AP MLD that supports EMLMR mode can send an enhanced multi-link operating mode notification frame (EML Operating Mode Notificaiton frame) to the AP MLD by setting the EMLMR Mode subfield (EMLMR Mode subfield) to 1. Instruct it to enable EMLMR mode. After receiving the EML Operating Mode Notificaiton frame replied by AP MLD, the EMLMR mode can be enabled.

Non-AP MLD is in EMLMR mode. In the EMLMR link set indicated by EMLMR Link Bitmap subfield, after a link performs the initial frame exchange (frame exchange), this non-AP MLD can:

On this link, the protocol data unit (Presentation Protocol Data Unit, PPDU) is received with the maximum number of received spatial streams (the number of Spatial Stream) indicated by EMLMR Supported MCS And NSS Set;

On this link, send PPDU with the maximum number of spatial streams (the number of Spatial Stream) indicated by EMLMR Supported MCS And NSS Set;

Execute the above introduction until the frame exchange ends. After the frame exchange ends, the remaining links in the EMLMR link set can send and receive data.

And it can be understood that during frame exchange in EMLMR mode, the behavior of non-AP MLD is essentially to switch the radio frequency chains (Radio Frequency Chain, RF Chain) of other links in the EMLMR link set to frame exchange link, so that the link obtains the sending and receiving capabilities indicated by EMLMR Supported MCS And NSS Set.

In order to better understand the related contents of the EMLSR mode and EMLMR mode introduced above, the enhanced multi-link operating mode notification frame (EML Operating Mode Notification frame format) is introduced in detail below.

The EML operation mode notification frame is used to indicate that the non-AP MLD to which the STA sending data belongs is changing its EML operation.

The following is an introduction to the EML Operating Mode Notification frame Action field format (EML Operating Mode Notification frame Action field format) in conjunction with Table 1.

Table 1

Among them, the category field is defined in 9.4.1.11 (Action field) in the protocol;

The EHT action field is defined in 9.6.34.1 (EHT Action field)

The conversation token field is set by the non-AP MLD to a non-zero value selected by the non-AP MLD and set by the AP MLD to the value copied from the corresponding received EML operating mode notification frame;

The EML control field is defined in 9-144i (EML Control field format).

The specific implementation of the EML control field will be introduced in detail below. The EML control field can be understood with reference to Figure 3. Figure 3 is a schematic diagram of the format of the EML control field provided by the embodiment of the present application.

As shown in Figure 3, the total length of the EML control field may be 65 bits, or 89 bits, or 113 bits. The EML control field includes multiple subfields. These subfields are described below.

Among them, the EMLSR Mode field occupies 1 bit and is located at bit 0. The EMLSR mode field is used to indicate whether the non-AP MLD enables the EMLSR mode. Enabling the EMLSR mode actually means that the non-AP MLD runs in the EMLSR mode.

And, the EMLMR Mode (EMLMR Mode) field occupies 1 bit, located at bit 1. The EMLMR mode field is used to indicate whether the non-AP MLD enables the EMLMR mode. Enabling the EMLMR mode actually means that the non-AP MLD runs in the EMLMR mode.

And, the EMLSR Link Bitmap field occupies 16 bits, located at bit 2-bit 17. The EMLSR link bitmap field is used to indicate the EMLSR link set. The links in the EMLSR link set are used for frame exchange between AP MLD and non-AP MLD in EMLSR mode. For example, the EMLSR link bitmap field can be 11100000 00000000 (Bit0 is at the front), indicating that the EMLSR link set includes: Link1, Link2, and Link3.

And, the Reserved field occupies 6 bits, located between bit 18 and bit 23.

And, the EMLMR Link Bitmap field occupies 0 bits or 16 bits, located at bit 24-bit 39. The EMLMR link bitmap field is used to indicate the EMLMR link set. The links in the EMLMR link set are used for frame exchange between AP MLD and non-AP MLD in EMLMR mode. For example, the EMLMR link bitmap field can be 11000000 00000000 (Bit0 is at the front), indicating that the EMLMR link set includes: Link1, Link2.

Also, the number of bits occupied by the EMLMR Supported MCS And NSS Set field is variable, and may be located between bit 42 and bit 65, or between bit 42 and bit 89, or Possibly located at bit 42-bit 113. Among them, EMLMR supports MAS and NSS The set field is used to indicate the set of modulation and coding schemes (Modulation and Coding Scheme, MCS) and number of spatial streams (Number of Spatial Stream, NSS) supported by the non-AP MLD in EMLMR mode.

And, the MCS Map Count field occupies 0 bits or 2 bits, located at bit 40-bit 41. The MCS mapping quantity field is used to indicate the bits occupied by the above-mentioned MAS and NSS set fields supported by EMLMR, specifically which of the following three types: bit 42-bit 65, bit 42-bit 89, Bit 42 - Bit 113.

After introducing the meaning of each field introduced above and the corresponding bits, it also needs to be explained that for a non-AP MLD, whether it specifically supports the EMLSR mode or the EMLMR mode, for the non-AP MLD is a an inherent attribute. Therefore, for a non-AP MLD, it must either enable the EMLSR mode through the EMLSR mode field or enable the EMLMR mode through the EMLMR mode field.

Based on the relevant contents of the EMLSR mode and EMLMR mode introduced above, the problems existing in the existing technology will be analyzed below.

Because the transmission of multicast frames (group addressed frames) occurs periodically. For EMLSR mode, while the non-AP MLD is performing EMLSR frame exchange on a certain link, the AP MLD will terminate the EMLSR frame exchange before transmitting the group addressed frame on other links in the EMLSR link set (links that do not perform frame exchange). And, no matter which other link in the EMLSR link set needs to transmit multicast frames, AL MLD will terminate the EMLSR frame exchange.

Among them, due to the fragmentation on the resource timeline, the overhead of Enhanced Distributed Channel Access (EDCA) to obtain the transmission opportunity (Transition Opportunity, TXOP), re-detection of the channel (sounding), etc., the system will be damaged. Reduction in efficiency.

Also, when there are multiple other links and the timing of transmitting multicast frames is not synchronized, EMLSR frame exchange may be frequently suspended, greatly reducing system efficiency.

In fact, non-AP MLD may not have any business need to receive group addressed frame (AP MLD does not need to terminate EMLSR frame exchange), or it may only receive group addressed frame on a certain link (AP MLD only needs to occur group addressed frame transmission on the corresponding link) When, stop EMLSR frame exchange).

Also, the problems existing in the EMLMR mode are similar to those introduced above and will not be described again here.

In view of the above-mentioned problem that when other links receive multicast frames, the frame exchange process of the link that performs frame exchange needs to be suspended, resulting in reduced system efficiency. This application proposes the following technical concept: by indicating that there are When transmitting multicast frames, does it need to stop frame exchange? Furthermore, it can indicate on which link there is a multicast frame transmission, when frame exchange needs to be stopped, thus effectively ensuring that even if other links want to receive multicast data , and try to avoid or reduce the suspension of frame exchanges on specific links, which can effectively improve system efficiency.

Based on the above introduction, the transmission method provided by this application is introduced in detail below with reference to specific embodiments. The data transmission method provided by the embodiments of this application can be applied to the first device or the second device. In this embodiment, at least two links are established between the first device and the second device. The first device may be, for example, the non-AP MLD introduced above, and the second device may be the AP MLD introduced above; or, the first device may be, for example, the AP MLD introduced above, and the second device may be the non-AP MLD introduced above. -AP MLD, this embodiment does not limit the specific implementation methods of the first device and the second device, and the first device and the second device There is also no limit to the specific number of links between devices, which can be selected and expanded according to actual needs.

Taking the first device as a non-AP MLD and the second device as an AP MLD as an example, the data transmission method on the first device side is first introduced in conjunction with Figure 4. Figure 4 is a flow chart of the transmission method provided by the embodiment of the present application. .

S401. Send instruction information to the second device, where the instruction information includes a first field and a second field. The first field is used to instruct the first device to enable the first mode. The first mode is one of the following: enhanced Type multi-link single radio frequency EMLSR mode, enhanced multi-link multi-radio EMLMR mode.

In this embodiment, the first device may send indication information to the second device, where the indication information may include a first field. The first field is used to instruct the first device to enable the first mode. In this embodiment, the first The mode can be EMLSR mode or EMLMR mode.

In a possible implementation manner, if the first device is a device that supports a single radio frequency, the indication information may instruct the first device to enable the EMLSR mode. Alternatively, if the first device is a device that supports multiple radio frequencies, the indication information may instruct the first device to enable the EMLMR mode. That is to say, the instruction information specifically indicates whether the first device enables the EMLSR mode or the EMLMR mode, depending on the specific conditions of the first device.

And in a possible implementation manner, the indication information in this embodiment can be, for example, the enhanced multi-link operation mode notification frame introduced above, and the first field in the indication information can be, for example, the enhanced multi-link The EMLSR mode subfield or the EMLMR mode subfield in the road operation mode notification frame. Or in the actual implementation process, the indication information and the first field in the indication information can be selected and set according to actual needs, as long as the indication information can achieve the function stated in this embodiment.

S402. In the first mode, perform frame exchange with the second device on the first link. The second field is used to indicate whether to terminate frame exchange when there is multicast frame transmission on a link other than the first link. .

After the first device sends the indication information, if a response information from the second device is received before timeout, the response information may also be an enhanced multi-link operation mode notification frame, and the specific content and indication of each field in the response information The specific contents of each field in the information are the same, and then the first device can operate in the first mode, that is, the EMLMR mode or the EMLSR mode, according to the instructions of the response information.

Then, in the first mode, the first device can exchange frames with the second device on the first link, where the first link is a link used for frame exchange, and it can be any one in the link set. Link, this embodiment does not limit this, and it can be selected according to actual needs.

And the indication information in this embodiment also includes a second field. The second field in this embodiment can indicate whether there is a multicast frame transmission on a link other than the first link and whether it is necessary to suspend the first mode. frame exchange.

In a possible implementation, if the second field indicates that there is multicast frame transmission on a link other than the first link, the frame exchange is not stopped, thereby effectively avoiding the The frame exchange in the first mode is suspended to effectively improve system efficiency.

Alternatively, if the second field indication indicates that frame exchange is to be terminated when there is multicast frame transmission on a link other than the first link, then the indication information may further indicate, for example, on which link the multicast frame is to be transmitted. , the frame exchange needs to be aborted. This can effectively reduce the frame exchange interruption in the first mode caused by the transmission of multicast frames, thereby effectively improving system efficiency.

The data transmission method provided by the embodiment of the present application includes: sending indication information to the second device, where the indication information includes a first field and a second field, the first field is used to instruct the first device to enable the first mode, and the third field One mode is one of the following: EMLSR mode, EMLMR mode. In first mode, on the first link and The second device performs frame exchange, and the second field is used to indicate whether to terminate frame exchange when there is multicast frame transmission on a link other than the first link. By including the second field in the indication information, the second field may indicate whether in the first mode, when there is multicast frame transmission on a link other than the first link used for frame exchange, whether the third field needs to be suspended. Frame exchange in mode 1, through the indication of the second field, can effectively avoid or reduce the interruption of frame exchange caused by the transmission of multicast frames, thereby effectively improving system efficiency.

Based on the above introduction, several possible implementation methods of the second field will be described below.

In a possible implementation manner, the first device may not have a service for receiving multicast frames.

It can be understood that multicast frames are sent by AP MLD for multicast of multiple non-AP MLDs, but not every non-AP MLD has the business of receiving multicast frames, so for this kind of non-existent multicast receiving The non-AP MLD of the frame service, although the AP MLD will send it, the non-AP MLD does not need to receive it.

Furthermore, if the first device does not have the service of receiving multicast frames, that is to say, the first device does not need to receive multicast frames, then the first device naturally does not need to terminate the frame exchange in the first mode. Therefore, in this implementation mode, the second field in this embodiment may be used to indicate not to suspend frame exchange in the first mode.

The currently introduced situation can be understood with a specific example in conjunction with Figure 5. Figure 5 is a schematic diagram 1 of the implementation of data transmission in the first mode provided by the embodiment of the present application.

As shown in Figure 5, assume that the first device is a non-AP MLD, the second device is an AP-MLD, and the first mode is the EMLSR mode.

Among them, the MLSR non-AP MLD has two STAs, namely STA1 and STA2. Each of these three STAs supports 2 spatial streams (Spatial Stream), and it is assumed that the non-AP MLD supports the EMLSR mode.

Also, there are three AP-MLDs, namely AP1, AP2, and AP3. These three APs work at 2.4GHz, 5GHz, and 6GHz respectively. Each supports 4 spatial stream capabilities, and it is assumed that the AP MLD supports EMLSR mode.

Among them, STA1 and AP1 have established a link, refer to link 1 in Figure 5; STA2 and AP2 have established a link, refer to link 2 in Figure 5. Among them, the AID associated with non-AP MLD is AID1.

Based on the above introduction, it can be determined that non-AP MLD will exchange EML operation mode control frames (that is, indication information) with AP MLD. In the EML operation mode control frame, for example, by changing the EMLSR mode field (that is, the first field ) is set to 1 to indicate that the non-AP MLD wants to enable EMLSR mode.

And, assuming that the EMLSR link bitmap field in the EML operation mode control frame is: 1100000000000000 (Bit0 is at the front), it means that the currently indicated EMLSR link set includes: link 1 and link 2, that is to say, these 2 Each link can be used for frame exchange in EMLSR mode.

At the same time, assuming that the non-AP MLD in this embodiment does not receive multicast frame services, the second field in this embodiment may indicate not to terminate frame exchange in the first mode. That is to say, while the non-AP MLD is exchanging EMLSR frames on a link between link 1 and link 2, there is no need to interrupt the EMLSR frame exchange to transmit multicast frames on other links other than the link.

The specific data transmission process is explained below in conjunction with Figure 5:

1. After non-AP MLD runs in EMLSR mode, assuming that STA2 receives the initial control frame through link 2 at time T1, then it can be determined that link 2 is the first link, where the initial control frame can be, for example, MU -RTS trigger frame, which has an AID of User Info field, such as AID1.

And, after SIDS from the end of the initial control frame, STA2 can, for example, send a Trigger Based PPDU on the allocated resource unit (Resource Unit) to reply to the CTS, and in the Trigger Based PPDU After the end moment of SIFS, the transmit and receive performance of 4 spatial streams is obtained to start EMLSR frame exchange.

Among them, the initial control frame corresponding to the EMLSR mode and the corresponding reply can also be selected according to actual needs, and this embodiment does not limit this.

2. STA2 can exchange frames with 2 spatial stream capabilities. For example, STA2 in Figure 5 can receive EHT MU PPDU and reply with Block Ack (BA) information. Among them, MU means multi-user (Multi-User). This enables frame exchange on link 2.

3. As shown in Figure 5, at time T2, if STA1 wants to receive a multicast frame, then STA1 can receive the Beacon message through link 1 and receive the multicast frame after the Beacon message.

However, in this embodiment, because non-AP MLD does not have the service of receiving multicast frames, STA1 will not receive Beacon messages and multicast frames at time T2, and EMLSR frame exchange will not be suspended.

It should be noted that the current FIG. 5 is an exemplary description for the EMLSR mode, but the situation in FIG. 5 is also similar for the EMLMR mode. The implementation in the EMLMR mode can refer to the above introduction, which will not be described again in this embodiment.

In this embodiment, when the first device does not have the service of receiving multicast frames, the second field is set to indicate not to terminate the frame exchange in the first mode, thereby effectively ensuring that the multicast frame transmission is not affected. This avoids the interruption of frame exchange, which can effectively improve system efficiency.

And in another possible implementation, the first device may have a service of receiving multicast frames, and during frame exchange in the first mode, the number of received spatial streams supported by the first device on the first link is The number of required radio frequency chains is less than the number of all radio frequency chains of the first device.

It should be noted that the current situation is for the EMLMR mode. First, link switching in the EMLMR mode is introduced.

During frame exchange in EMLMR mode, the behavior of non-AP MLD is essentially to switch the radio frequency links of other links in the EMLMR link set to the link for frame exchange, so that the link becomes EMLMR Supported Transmitting and receiving capabilities indicated by MCS And NSS Set.

In a possible implementation, when switching radio frequency chains, all radio frequency chains may not be switched to the link for frame exchange, but part of the radio frequency chains may be reserved to ensure that other links can retain reception. Multicast frame capability. That is to say, as explained in this embodiment, the number of radio frequency chains required for receiving spatial streams supported by the first device on the first link is less than the number of all radio frequency chains of the first device.

It can be understood that in this case, because the ability to receive multicast frames is reserved for other links in advance, there is no need to interrupt frame exchange in the first mode even if multicast frames need to be received. Therefore, in this embodiment The second field of may indicate not to abort frame exchange in the first mode.

The following also uses a specific example to understand the currently introduced situation with reference to Figure 6. Figure 6 is a second schematic diagram of the implementation of data transmission in the first mode provided by the embodiment of the present application.

As shown in Figure 6, assume that the first device is a non-AP MLD and the second device is an AP-MLD.

Among them, the non-AP MLD has three STAs, namely STA1, STA2, and STA3. Each of these three STAs supports 2 spatial streams, and it is assumed that the non-AP MLD supports the EMLMR mode.

And, there are three AP-MLDs, namely AP1, AP2, and AP3. These three APs work at 2.4GHz, 5GHz, and 6GHz respectively. Each supports 4 spatial stream capabilities, and it is assumed that the AP MLD supports EMLMR mode.

Among them, STA1 and AP1 have established a link, refer to link 1 in Figure 6; STA2 and AP2 have established a link, Refer to link 2 in Figure 6; STA3 and AP3 have established a link, refer to link 3 in Figure 6. Among them, the AID associated with non-AP MLD is AID1.

Based on the above introduction, it can be determined that non-AP MLD will exchange EML operation mode control frames (that is, indication information) with AP MLD. In the EML operation mode control frame, for example, the EMLMR mode field (that is, the first field) can be ) is set to 1 to indicate that the non-AP MLD wants to enable EMLMR mode.

And, assuming that the EMLMR link bitmap field in the EML operation mode control frame is: 1110000000000000 (Bit0 is at the front), it means that the currently indicated EMLMR link set includes: link 1, link 2, link 3, also That is to say, these three links can be used for frame exchange in EMLMR mode.

And, assuming that the MAS and NSS set fields supported by EMLMR indicate, a maximum of 4 streams of reception capability and 4 streams of transmission capability are supported during EMLMR frame exchange.

Based on the above introduction, it can be determined that STA1, STA2, and STA3 each support 2 spatial streams. If all radio frequency chains are switched to the link for frame exchange, then during the EMLMR frame exchange period, the maximum Supports 6-stream reception capability, but in this embodiment, during the EMLMR frame exchange period, it only supports up to 4-stream reception capability. That is, all radio frequency chains are not used up during the EMLMR frame exchange period. Therefore, during the EMLMR frame exchange period, non-AP MLD has the ability to Multicast frames are received on other links.

Therefore, the second field in this embodiment can indicate not to terminate the frame exchange in the first mode. In other words, while non-AP MLD is exchanging EMLMR frames on a link among link 1, link 2, and link 3, there is no need to suspend the transmission of multicast frames on other links other than the link. EMLMR frame exchange.

The specific data transmission process is explained below in conjunction with Figure 6:

1. After non-AP MLD runs in EMLMR mode, assuming that at time T1, STA2 receives the initial control frame through link 2, then it can be determined that link 2 is the first link, where the initial control frame can be QoS, for example. Null frame (QoS Null frame), in which the initial control frame corresponding to the EMLMR mode can be selected according to actual needs, and this embodiment does not limit this.

And, STA2 can reply ACK, and after SIFS, obtain the sending and receiving performance of 4 spatial streams to start EMLMR frame exchange.

2. STA2 can perform frame exchange with 4 spatial stream capabilities. For example, STA2 in Figure 6 can receive EHT MU PPDU and reply Block Ack information.

3. As shown in Figure 6, at time T2, STA1 can receive the Beacon message through link 1 and receive the multicast frame after the Beacon message.

Because link 1 for frame exchange does not occupy all radio frequency chains, STA1 still has the ability to receive multicast frames, so there is no need to interrupt EMLMR frame exchange when receiving multicast frames.

The situation described in Figure 6 above is that all links are included in the EMLMR link set, and then the links for frame exchange are not occupied by all radio frequency chains, thus ensuring that the remaining links still have the ability to receive multicast frames.

In another possible implementation, it is possible that all links are not included in the EMLMR link set. It is understandable that the switching of the radio frequency chain is only for links in the EMLMR link set. For links that are not included in the EMLMR link set, there is no need to switch the radio frequency chain, so these links naturally retain the ability to receive multicast frames. This situation also corresponds to the fact that during the current frame exchange in the first mode, the number of radio frequency chains required for receiving the number of spatial streams supported by the first device on the first link is less than the number of all radio frequency chains of the first device. Condition.

Next, with reference to Figure 7, the situation in which all links are not included in the EMLMR link set will be explained. Figure 7 is a schematic diagram 3 of the implementation of data transmission in the first mode provided by the embodiment of the present application.

As shown in Figure 7, assume that the first device is a non-AP MLD and the second device is an AP-MLD.

Among them, the non-AP MLD has three STAs, namely STA1, STA2, and STA3. Each of these three STAs supports 2 spatial streams, and it is assumed that the non-AP MLD supports the EMLMR mode.

And, there are three AP-MLDs, namely AP1, AP2, and AP3. These three APs work at 2.4GHz, 5GHz, and 6GHz respectively. Each supports 4 spatial stream capabilities, and it is assumed that the AP MLD supports EMLMR mode.

Among them, STA1 and AP1 have established a link, refer to link 1 in Figure 7; STA2 and AP2 have established a link, refer to link 2 in Figure 7; STA3 and AP3 have established a link, refer to link 3 in Figure 7. Among them, the AID associated with non-AP MLD is AID1.

Based on the above introduction, it can be determined that non-AP MLD will exchange EML operation mode control frames (that is, indication information) with AP MLD. In the EML operation mode control frame, for example, the EMLMR mode field (that is, the first field) can be ) is set to 1 to indicate that the non-AP MLD wants to enable EMLMR mode.

And, assuming that the EMLMR link bitmap field in the EML operation mode control frame is: 1100000000000000 (Bit0 is at the front), it means that the currently indicated EMLMR link set includes: link 1 and link 2, that is to say, these 2 Each link can be used for frame exchange in EMLMR mode.

And, assuming that the MAS and NSS set fields supported by EMLMR indicate, a maximum of 4 streams of reception capability and 4 streams of transmission capability are supported during EMLMR frame exchange.

Based on the above introduction, it can be determined that STA1, STA2, and STA3 each support 2 spatial streams. Because the EMLMR link set includes link 1 and link 2, the radio frequency chains of link 1 and link 2 can be switched to the link for frame exchange to ensure that up to 4 streams are supported during EMLMR frame exchange. Receiving ability. Link 3 is not included in the EMLMR link set, so its radio frequency chain is still retained on link 3.

In this embodiment, non-AP MLD can receive multicast frames on links that are not included in the EMLMR link set, because these links have the ability to receive multicast frames without interrupting frame exchange. In the actual implementation process, there may be multiple links that are not included in the EMLMR link set. For example, one link may be selected from multiple links to receive multicast frames. So in the current example shown in Figure 7, the link used to receive multicast frames is link 3.

Therefore, the second field in this embodiment can indicate not to terminate the frame exchange in the first mode. In other words, while the non-AP MLD is exchanging EMLMR frames on one of Link 1 and Link 2, there is no need to interrupt the EMLMR frame exchange by transmitting multicast frames on other links other than the link.

The specific data transmission process is explained below in conjunction with Figure 7:

1. After non-AP MLD runs in EMLMR mode, assuming that at time T1, STA2 receives the initial control frame through link 2, then it can be determined that link 2 is the first link, where the initial control frame can be QoS, for example. Empty frame, where the initial control frame corresponding to the EMLMR mode can be selected according to actual requirements, and this embodiment does not limit this.

And, STA2 can reply ACK, and after SIFS, obtain the sending and receiving performance of 4 spatial streams to start EMLMR frame exchange.

2. STA2 can perform frame exchange with 4 spatial stream capabilities. For example, STA2 in Figure 7 can receive EHT MU PPDU and reply Block Ack information.

3. As shown in Figure 7, at time T2, if STA1 wants to receive a multicast frame, then STA1 can receive the Beacon message through link 1 and receive the multicast frame after the Beacon message.

However, because multicast frames are received on link 3 in this embodiment, STA1 does not receive Beacon messages and subsequent multicast frames.

4. Because link 3 is not included in the EMLMR link set, link 3 retains its own radio frequency chain and can be used to receive multicast frames. Therefore, at time T3, STA3 can receive Beacon messages and subsequent multicast frames without interrupting EMLMR frame exchange.

In this embodiment, during frame exchange, if the number of radio frequency chains required for receiving spatial streams supported by the first device on the first link is less than the number of all radio frequency chains of the first device, that is, reserved for other links When you have the ability to receive multicast frames, you can set the second field to indicate not to interrupt the frame exchange in the first mode, thereby effectively avoiding the interruption of frame exchange without affecting the transmission of multicast frames, and thus enabling Effectively improve system efficiency.

And in another possible implementation, the second field in this embodiment may also indicate that frame exchange in the first mode is suspended when there is multicast frame transmission.

In this implementation, the indication information may further include a third field, and the third field may be used to indicate the second link.

When the first device has a service of receiving multicast frames, the first device may specify to receive multicast frames only on the second link. The second link can be selected and set according to actual needs. Therefore, the second field in this embodiment can indicate that when there is multicast frame transmission on the second link, frame exchange in the first mode is stopped.

In other words, for links other than the second link, if there is multicast frame transmission, there is no need to stop frame exchange.

The following also uses a specific example to understand the currently introduced situation with reference to Figure 8. Figure 8 is a schematic diagram 4 of the implementation of data transmission in the first mode provided by the embodiment of the present application.

As shown in Figure 8, assume that the first device is a non-AP MLD and the second device is an AP-MLD.

Among them, the non-AP MLD has three STAs, namely STA1, STA2, and STA3. Each of these three STAs supports 2 spatial streams, and it is assumed that the non-AP MLD supports the EMLMR mode.

And, there are three AP-MLDs, namely AP1, AP2, and AP3. These three APs work at 2.4GHz, 5GHz, and 6GHz respectively. Each supports 4 spatial stream capabilities, and it is assumed that the AP MLD supports EMLMR mode.

Among them, STA1 and AP1 have established a link, refer to link 1 in Figure 8; STA2 and AP2 have established a link, refer to link 2 in Figure 8; STA3 and AP3 have established a link, refer to link 3 in Figure 8. Among them, the AID associated with non-AP MLD is AID1.

Based on the above introduction, it can be determined that non-AP MLD will exchange EML operation mode control frames (that is, indication information) with AP MLD. In the EML operation mode control frame, for example, the EMLMR mode field (that is, the first field) can be ) is set to 1 to indicate that the non-AP MLD wants to enable EMLMR mode.

And, assuming that the EMLMR link bitmap field in the EML operation mode control frame is: 1110000000000000 (Bit0 is at the front), it means that the currently indicated EMLMR link set includes: link 1, link 2, link 3, also That is to say, these three links can be used for frame exchange in EMLMR mode.

And, assuming that the MAS and NSS set fields supported by EMLMR indicate, a maximum of 6 streams of reception capability and 6 streams of transmission capability are supported during EMLMR frame exchange.

And, assuming that the third field in the indication information in this embodiment indicates that the second link is link 3, then the second field in this embodiment can indicate that the non-AP MLD is in link 1, link 2, During the EMLMR frame exchange on a certain link in link 3, the EMLMR frame exchange needs to be stopped for the transmission of multicast frames on link 3.

The specific data transmission process is explained below in conjunction with Figure 8:

1. After non-AP MLD runs in EMLMR mode, assuming that at time T1, STA2 receives the initial control frame through link 2, then it can be determined that link 2 is the first link, where the initial control frame can be QoS, for example. Null frame (QoS Null frame), in which the initial control frame corresponding to the EMLMR mode can be selected according to actual needs, and this embodiment does not limit this.

And, STA2 can reply ACK and obtain the sending and receiving performance of 6 spatial streams after SIFS to start EMLMR frame exchange.

2. STA2 can exchange frames with 6 spatial stream capabilities. For example, STA2 in Figure 8 can receive EHT MU PPDU and reply Block Ack information.

3. As shown in Figure 8, at time T2, if STA1 wants to receive a multicast frame, then STA1 can receive the Beacon message through link 1 and receive the multicast frame after the Beacon message.

However, because the second link indicated by the third field in this embodiment is link 3, that is to say, only nin-AP MLD will receive multicast frames on link 3, so at time T2, STA1 does not receive Beacon messages and subsequent multicast frames.

4. Because the second link indicated by the third field in this embodiment is link 3, referring to Figure 8, at time T3, STA3 can receive the Beacon message and the subsequent multicast frame. When receiving Beacon messages and subsequent multicast frames, EMLMR frame exchange has been terminated.

The time node for stopping EMLMR frame exchange is explained here. In a possible implementation, the frame exchange can be stopped before the first time, where the first time is the first time period before the start time of transmitting the multicast frame. corresponding moment.

For example, the AP MLD knows that the non-AP MLD will receive multicast frames on link 3, so before the multicast frame transmission starts on link 3, it can end the EMLMR frame exchange a period of time in advance to ensure that the non-AP MLD has time to switch its RF chain. The advance period here is the first duration introduced above.

In a possible implementation, the first duration is not less than the time required for non-AP MLD to switch the RF chain, and the first duration can, for example, be notified to the AP MLD through additional signaling.

In this embodiment, the operation of terminating EMLMR frame exchange can be completed by AP MLD or non-AP MLD, which depends on the specific data transmission process, and this embodiment does not limit this.

The above example in Figure 8 describes the situation where the second link and the first link are not the same link. In a possible implementation, the second link and the first link in this embodiment may also be It is the same link, that is to say, the link that performs frame exchange, that is, the link that needs to stop frame exchange due to multicast frame transmission. This situation will be explained below in conjunction with Figure 9, which is an embodiment of the present application. Schematic diagram 5 of the implementation of data transmission in the first mode is provided.

As shown in Figure 9, assume that the first device is a non-AP MLD and the second device is an AP-MLD.

Among them, the non-AP MLD has two STAs, namely STA1 and STA2. These two STAs each support 2 spatial streams, and it is assumed that the non-AP MLD supports the EMLSR mode.

And, there are three AP-MLDs, namely AP1, AP2, and AP3. These three APs work at 2.4GHz respectively. and 5GHz and 6GHz, each supporting 4 spatial stream capabilities, and assuming that the AP MLD supports EMLSR mode.

Among them, STA1 and AP1 have established a link, refer to link 1 in Figure 9; STA2 and AP2 have established a link, refer to link 2 in Figure 9. Among them, the AID associated with non-AP MLD is AID1.

Based on the above introduction, it can be determined that non-AP MLD will exchange EML operation mode control frames (that is, indication information) with AP MLD. In the EML operation mode control frame, for example, by changing the EMLSR mode field (that is, the first field ) is set to 1 to indicate that the non-AP MLD wants to enable EMLSR mode.

And, assuming that the EMLSR link bitmap field in the EML operation mode control frame is: 1100000000000000 (Bit0 is at the front), it means that the currently indicated EMLSR link set includes: link 1 and link 2, that is to say, these 2 Each link can be used for frame exchange in EMLSR mode.

And, assuming that the third field in the indication information in this embodiment indicates that the second link is link 2, then the second field in this embodiment can indicate that the non-AP MLD is in link 1 and link 2. During the EMLSR frame exchange on a certain link, the EMLSR frame exchange needs to be stopped for the transmission of multicast frames on link 2.

The specific data transmission process is explained below in conjunction with Figure 9:

1. After non-AP MLD runs in EMLSR mode, assuming that STA2 receives the initial control frame through link 2 at time T1, then it can be determined that link 2 is the first link, where the initial control frame can be, for example, MU -RTS trigger frame, which has an AID of User Info field, such as AID1.

And, after SIDS at the end of the initial control frame, STA2 can, for example, send a Trigger Based PPDU reply to CTS on the allocated resource unit, and after SIFS at the end of the Trigger Based PPDU, obtain the sending and receiving performance of 4 spatial streams. , to start EMLSR frame exchange.

2. STA2 can exchange frames with 2 spatial stream capabilities. For example, STA2 in Figure 9 can receive EHT MU PPDU and reply Block Ack information.

3. As shown in Figure 9, at time T2, if STA1 wants to receive a multicast frame, then STA1 can receive the Beacon message through link 1 and receive the multicast frame after the Beacon message.

However, because the second link indicated by the third field in this embodiment is link 2, that is to say, only nin-AP MLD will receive multicast frames on link 2, so at time T2, STA1 does not receive Beacon messages and subsequent multicast frames.

In this embodiment, by instructing to stop frame exchange when there is multicast frame transmission on a specific link, it can effectively avoid the need to stop frame exchange when there is multicast frame transmission on any one of the other links. , which can effectively reduce the number of frame exchange interruptions and effectively improve system efficiency.

The above embodiments introduce various possible implementations of the second field. Based on the above introduction, possible implementations of the indication information, the second field and the third field are described.

In a possible implementation, the indication information in this embodiment may be the EML operation mode notification frame introduced above, and the first field may be, for example, the EMLSR mode subfield in the EML operation mode notification frame introduced above or EMLMR mode subfield.

And based on the above introduction, it can be determined that there is a reserved field in the EML operation mode notification frame, then the second field and/or the third field in this embodiment can be, for example, the enhanced multi-link operation mode notification frame. Some of the reserved fields in .

Among them, the reserved resources in the EML operation mode notification frame are B18-B23, then for example, a certain bit in B18-B23 can be used as the second field, for example, the B18 field can be selected, or any other possible words part.

For example, the second field can be named End Of EML Frame Exchange At MC On Another Link subfield (end EML frame exchange at MC in other links). For example, when this field is 1, it indicates that the first mode needs to be terminated. Frame exchange, when this field is 0, it indicates that there is no need to terminate the frame exchange in the first mode.

And, for example, you can use certain 4 consecutive bits in B18-B23 as the third field, for example, you can choose the B19-B23 field, or any other possible field.

For example, the third field can be named MC link subfield (multicast link subfield), where MC means multicast. The value of the third field is used to indicate on which link the multicast frame is specifically received, that is, for multicast frame transmission on this link, frame exchange in the first mode needs to be stopped.

To sum up, the data transmission method provided by the embodiment of the present application includes the third field in the indication information and uses the second field to indicate that there is no need to suspend frame exchange in the first mode for multicast frame transmission, or uses the second The field indicates that frame exchange in the first mode is suspended only for multicast frame transmission on a specific link, which can effectively avoid or reduce the occurrence of frame exchange interruption in the first mode, thereby effectively improving system efficiency.

The above embodiment is explained from the side of the first device. The implementation on the side of the second device is similar to that introduced in the above embodiment and will not be described in detail here. For its specific implementation and beneficial effects, please refer to the above. Description of the Examples.

Figure 10 is a schematic structural diagram of a data transmission device provided by an embodiment of the present application. As shown in Figure 10, the device 100 includes: a sending module 1001 and a processing module 1002.

The sending module 1001 is configured to send indication information to the second device, where the indication information includes a first field and a second field, and the first field is used to indicate that the first device enables the first mode, so The first mode is one of the following: enhanced multi-link single radio frequency EMLSR mode, enhanced multi-link multi-radio frequency EMLMR mode;

Processing module 1002, configured to exchange frames with the second device on the first link in the first mode, and the second field is used to indicate a link outside the first link. When there is a multicast frame transmission on the network, whether to abort the frame exchange.

In a possible design, the first device does not have a service of receiving multicast frames;

Wherein, the second field is used to indicate not to suspend frame exchange in the first mode.

In a possible design, the first device has a service of receiving multicast frames, and during the frame exchange, the first device supports the number of radio frequencies required for receiving spatial streams on the first link. The number of chains is less than the number of all radio frequency chains of the first device;

Wherein, the second field is used to indicate not to suspend frame exchange in the first mode.

In a possible design, the indication information further includes a third field, where the third field is used to indicate the second link;

The first device has a service of receiving multicast frames, wherein the second field is used to indicate that frame exchange in the first mode is suspended when multicast frame transmission exists on the second link.

In a possible design, the processing module 1002 is also used to:

The frame exchange is stopped before a first time, which is a time corresponding to a first duration before the start time of transmitting the multicast frame.

In a possible design, the indication information is an enhanced multi-link operation mode notification frame.

In a possible design, the second field and/or the third field are some of the reserved fields in the enhanced multi-link operation mode notification frame.

The device provided in this embodiment can be used to execute the technical solutions of the above method embodiments. Its implementation principles and technical effects are similar, and will not be described again in this embodiment.

Figure 11 is a schematic second structural diagram of a data transmission device provided by an embodiment of the present application. As shown in Figure 11, the device 110 includes: a receiving module 1101 and a processing module 1102.

The receiving module 1101 is configured to receive indication information sent by the first device, where the indication information includes a first field and a second field, and the first field is used to indicate that the first device enables the first Mode, the first mode is one of the following: enhanced multi-link single radio frequency EMLSR mode, enhanced multi-link multi-radio frequency EMLMR mode;

The processing module 1102 is configured to perform frame exchange with the first device on the first link in the first mode, and the second field is used to indicate a link outside the first link. When there is a multicast frame transmission on the network, whether to abort the frame exchange.

In a possible design, the first device does not have a service of receiving multicast frames;

Wherein, the second field is used to indicate not to suspend frame exchange in the first mode.

In a possible design, the first device has a service of receiving multicast frames, and during the frame exchange, the first device supports the number of radio frequencies required for receiving spatial streams on the first link. The number of chains is less than the number of all radio frequency chains of the first device;

Wherein, the second field is used to indicate not to suspend frame exchange in the first mode.

In a possible design, the indication information further includes a third field, where the third field is used to indicate the second link;

The first device has a service of receiving multicast frames, wherein the second field is used to indicate that frame exchange in the first mode is suspended when multicast frame transmission exists on the second link.

In a possible design, the processing module 1102 is also used to:

The frame exchange is stopped before a first time, which is a time corresponding to a first duration before the start time of transmitting the multicast frame.

In a possible design, the indication information is an enhanced multi-link operation mode notification frame.

In a possible design, the second field and/or the third field are some of the reserved fields in the enhanced multi-link operation mode notification frame.

The device provided in this embodiment can be used to execute the technical solutions of the above method embodiments. Its implementation principles and technical effects are similar, and will not be described again in this embodiment.

Figure 12 is a schematic diagram of the hardware structure of the data transmission device provided by the embodiment of the present application. As shown in Figure 12, the data transmission device 120 of this embodiment includes: a processor 1201 and a memory 1202; wherein

Memory 1202, used to store computer execution instructions;

The processor 1201 is configured to execute computer execution instructions stored in the memory to implement various steps performed by the data transmission method in the above embodiment. For details, please refer to the relevant descriptions in the foregoing method embodiments.

Optionally, the memory 1202 can be independent or integrated with the processor 1201.

When the memory 1202 is set independently, the data transmission device also includes a bus 1203 for connecting the memory 1202. memory 1202 and processor 1201.

Figure 13 is a schematic diagram 2 of the hardware structure of the data transmission device provided by the embodiment of the present application. As shown in Figure 13, the data transmission device 130 of this embodiment includes: a processor 1301 and a memory 1302; wherein

Memory 1302, used to store computer execution instructions;

The processor 1301 is configured to execute computer execution instructions stored in the memory to implement various steps performed by the data transmission method in the above embodiment. For details, please refer to the relevant descriptions in the foregoing method embodiments.

Optionally, the memory 1302 can be independent or integrated with the processor 1301.

When the memory 1302 is provided independently, the data transmission device also includes a bus 1303 for connecting the memory 1302 and the processor 1301.

An embodiment of the present application also provides a chip, which includes a processor. The processor can be used to execute computer execution instructions stored in the memory to implement the data transmission method described in any of the above method embodiments of the present application. Optionally, the memory that stores instructions executed by the computer may be a memory inside the chip or a memory outside the chip.

Regarding the various modules/units included in each device and product described in the above embodiments, they may be software modules/units or hardware modules/units, or they may be partly software modules/units and partly hardware modules/units. . For example, for various devices and products applied to or integrated into a chip, each module/unit included therein can be implemented in the form of hardware such as circuits, or at least some of the modules/units can be implemented in the form of a software program. The software program Running on the processor integrated inside the chip, the remaining (if any) modules/units can be implemented using circuits and other hardware methods; for various devices and products applied to or integrated into the chip module, each module/unit included in it can They are all implemented in the form of hardware such as circuits. Different modules/units can be located in the same component of the chip module (such as chips, circuit modules, etc.) or in different components. Alternatively, at least some modules/units can be implemented in the form of software programs. The software program runs on the processor integrated inside the chip module, and the remaining (if any) modules/units can be implemented using circuits and other hardware methods; for various devices and products applied to or integrated in terminal equipment/network equipment, other Each included module/unit can be implemented in the form of hardware such as circuits. Different modules/units can be located in the same component (such as a chip, circuit module, etc.) or in different components within the terminal device/network device, or at least some of the modules/units. The unit can be implemented in the form of a software program, which runs on the processor integrated within the terminal device/network device. The remaining (if any) modules/units can be implemented in hardware such as circuits.

Embodiments of the present application also provide a computer-readable storage medium. Computer-executable instructions are stored in the computer-readable storage medium. When the processor executes the computer-executable instructions, the data transmission method performed by the above data transmission device is implemented. .

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of modules is only a logical function division. In actual implementation, there may be other division methods, for example, multiple modules may be combined or integrated. to another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or modules, and may be in electrical, mechanical or other forms.

The above integrated modules implemented in the form of software function modules can be stored in a computer-readable storage medium. The above software function modules are stored in a storage medium and include a number of instructions to make a computer A computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (English: processor) executes some steps of the methods described in various embodiments of this application.

It should be understood that the above-mentioned processor may be a central processing unit (English: Central Processing Unit, referred to as: CPU), or other general-purpose processor, digital signal processor (English: Digital Signal Processor, referred to as: DSP), or an application-specific integrated circuit (English: Application Specific Integrated Circuit, abbreviation: ASIC), etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in conjunction with the invention can be directly embodied and executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

The memory may include high-speed RAM memory, and may also include non-volatile storage NVM, such as at least one disk memory, which may also be a USB flash drive, a mobile hard disk, a read-only memory, a magnetic disk, or an optical disk.

The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, the bus in the drawings of this application is not limited to only one bus or one type of bus.

The above storage medium can be implemented by any type of volatile or non-volatile storage device or their combination, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable Except programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. Storage media can be any available media that can be accessed by a general purpose or special purpose computer.

Persons of ordinary skill in the art can understand that all or part of the steps to implement the above method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps including the above-mentioned method embodiments are executed; and the aforementioned storage media include: ROM, RAM, magnetic disks, optical disks and other media that can store program codes.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present application. scope.

Claims (33)

A data transmission method, characterized in that it is applied to a first device, wherein at least two links are established between the first device and a second device, and the method includes: Send instruction information to the second device, where the instruction information includes a first field and a second field, the first field is used to instruct the first device to enable a first mode, and the first mode is as follows One of: enhanced multi-link single radio frequency EMLSR mode, enhanced multi-link multi-radio EMLMR mode; In the first mode, frames are exchanged with the second device on the first link, and the second field is used to indicate the existence of multicast frame transmission on a link other than the first link. , whether to abort the frame exchange. The method according to claim 1, characterized in that the first device does not have a service of receiving multicast frames; Wherein, the second field is used to indicate not to suspend frame exchange in the first mode. The method according to claim 1, characterized in that the first device has a service of receiving multicast frames, and during the frame exchange, the receiving space supported by the first device on the first link The number of radio frequency chains required for the number of flows is less than the number of all radio frequency chains of the first device; Wherein, the second field is used to indicate not to suspend frame exchange in the first mode. The method according to claim 1, characterized in that the indication information further includes a third field, and the third field is used to indicate the second link; The first device has a service of receiving multicast frames, wherein the second field is used to indicate that frame exchange in the first mode is suspended when multicast frame transmission exists on the second link. The method of claim 4, further comprising: The frame exchange is stopped before a first time, which is a time corresponding to a first duration before the start time of transmitting the multicast frame. The method according to any one of claims 1 to 5, characterized in that the indication information is an enhanced multi-link operation mode notification frame. The method according to claim 6, wherein the second field and/or the third field are some of the reserved fields in the enhanced multi-link operation mode notification frame. A data transmission method, characterized in that it is applied to a second device, wherein at least two links are established between the second device and the first device, and the method includes: Receive indication information sent by the first device, wherein the indication information includes a first field and a second field, the first field is used to indicate that the first device enables the first mode, and the first The mode is one of the following: enhanced multi-link single radio frequency EMLSR mode, enhanced multi-link multi-radio EMLMR mode; In the first mode, frames are exchanged with the first device on the first link, and the second field is used to indicate the existence of multicast frame transmission on a link other than the first link. , whether to abort the frame exchange. The method according to claim 8, characterized in that the first device does not have a service of receiving multicast frames; Wherein, the second field is used to indicate not to suspend frame exchange in the first mode. The method according to claim 8, characterized in that the first device has a service of receiving multicast frames, and during the frame exchange, the receiving space supported by the first device on the first link The number of radio frequency chains required for the number of flows is less than the number of all radio frequency chains of the first device; Wherein, the second field is used to indicate not to suspend frame exchange in the first mode. The method according to claim 8, wherein the indication information further includes a third field, and the third field is used to indicate the second link; The first device has a service of receiving multicast frames, wherein the second field is used to indicate that in the second When there is multicast frame transmission on the link, frame exchange in the first mode is stopped. The method according to claim 11, characterized in that, the method further includes: The frame exchange is stopped before a first time, which is a time corresponding to a first duration before the start time of transmitting the multicast frame. The method according to any one of claims 8-12, characterized in that the indication information is an enhanced multi-link operation mode notification frame. The method according to claim 13, characterized in that the second field and/or the third field are some of the reserved fields in the enhanced multi-link operation mode notification frame. A data transmission device, characterized by including: A sending module, configured to send indication information to the second device, wherein the indication information includes a first field and a second field, the first field is used to indicate that the first device enables the first mode, and the first The mode is one of the following: enhanced multi-link single radio frequency EMLSR mode, enhanced multi-link multi-radio EMLMR mode; A processing module configured to exchange frames with the second device on the first link in the first mode, and the second field is used to indicate that on a link other than the first link Whether to abort the frame exchange when there is multicast frame transmission. The device according to claim 15, characterized in that the first device does not have a service of receiving multicast frames; Wherein, the second field is used to indicate not to suspend frame exchange in the first mode. The apparatus according to claim 15, characterized in that the first device has a service of receiving multicast frames, and during the frame exchange, the first device supports a receiving space on the first link. The number of radio frequency chains required for the number of flows is less than the number of all radio frequency chains of the first device; Wherein, the second field is used to indicate not to suspend frame exchange in the first mode. The device according to claim 15, wherein the indication information further includes a third field, and the third field is used to indicate the second link; The first device has a service of receiving multicast frames, wherein the second field is used to indicate that frame exchange in the first mode is suspended when multicast frame transmission exists on the second link. The device according to claim 18, characterized in that the processing module is also used to: The frame exchange is stopped before a first time, which is a time corresponding to a first duration before the start time of transmitting the multicast frame. The device according to any one of claims 16 to 19, wherein the indication information is an enhanced multi-link operation mode notification frame. The apparatus according to claim 20, wherein the second field and/or the third field are some of the reserved fields in the enhanced multi-link operation mode notification frame. A data transmission device, characterized by including: A receiving module configured to receive indication information sent by the first device, wherein the indication information includes a first field and a second field, and the first field is used to indicate that the first device enables the first mode, so The first mode is one of the following: enhanced multi-link single radio frequency EMLSR mode, enhanced multi-link multi-radio frequency EMLMR mode; A processing module configured to exchange frames with the first device on the first link in the first mode, and the second field is used to indicate that on a link other than the first link Whether to abort the frame exchange when there is multicast frame transmission. The device according to claim 22, characterized in that the first device does not have a service of receiving multicast frames; Wherein, the second field is used to indicate not to suspend frame exchange in the first mode. The apparatus according to claim 22, characterized in that the first device has a service of receiving multicast frames, and during the frame exchange, the first device supports a receiving space on the first link. The number of radio frequency chains required for the number of flows is less than the number of all radio frequency chains of the first device; Wherein, the second field is used to indicate not to suspend frame exchange in the first mode. The device according to claim 22, wherein the indication information further includes a third field, and the third field is used to indicate the second link; The first device has a service of receiving multicast frames, wherein the second field is used to indicate that frame exchange in the first mode is suspended when multicast frame transmission exists on the second link. The device according to claim 25, characterized in that the processing module is also used to: The frame exchange is stopped before a first time, which is a time corresponding to a first duration before the start time of transmitting the multicast frame. The device according to any one of claims 22 to 26, wherein the indication information is an enhanced multi-link operation mode notification frame. The apparatus according to claim 27, wherein the second field and/or the third field are some of the reserved fields in the enhanced multi-link operation mode notification frame. A data transmission device, characterized by including: Memory, used to store programs; A processor configured to execute the program stored in the memory. When the program is executed, the processor is configured to execute the method according to any one of claims 1 to 7. A data transmission device, characterized by including: Memory, used to store programs; A processor configured to execute the program stored in the memory. When the program is executed, the processor is configured to execute the method according to any one of claims 8 to 14. A chip, characterized in that the chip includes a processor, and the processor executes computer execution instructions, so that the processor executes the method as described in any one of claims 1 to 7 or 8 to 14 . A computer-readable storage medium, characterized by comprising instructions that, when run on a computer, cause the computer to perform the method described in any one of claims 1 to 7 or 8 to 14. A computer program product, including a computer program, characterized in that when the computer program is executed by a processor, the method described in any one of claims 1 to 7 or 8 to 14 is implemented.