CN117480821A

CN117480821A - Transmission method and device

Info

Publication number: CN117480821A
Application number: CN202180099113.XA
Authority: CN
Inventors: 徐彦超; 王泷
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2024-01-30
Also published as: WO2023029009A1

Abstract

The embodiment of the application provides a transmission method and a transmission device, wherein the method comprises the following steps: the first device receives a first frame sent by the second device on the first link, wherein the first frame comprises first interval information, and the first interval information is used for indicating a time interval for the second device to send a Beacon message through the second link. The first device receives a first number of remaining intervals transmitted by the second device over the second link. And the first equipment determines the TBTT corresponding to the DTIM Beacon transmitted by the second equipment on the second link according to the first interval information and/or the first residual interval quantity. After the first device receives the first frame, the first remaining interval number sent by the second device is received on the second link, so that the first device can be effectively ensured to accurately determine the TBTT corresponding to the DTIM Beacon on the second link.

Description

Transmission method and device

Technical Field

The present disclosure relates to the field of communications, and in particular, to a transmission method and apparatus.

Background

A Multi-Link Device (MLD) is a Device supporting data transmission on multiple links at the same time, and two communication ends of the Multi-Link Device may be a Station (STA) MLD and an Access Point (AP) MLD, respectively.

Currently, the STA MLD and the AP MLD may perform a connection process only on the first link, and establish a plurality of links and determine connection parameters on each link through information interacted in the connection process on the first link, where the connection parameters may include a transmission data indication map (Delivery Traffic indication map, DTIM) counter. In the prior art, when determining the DTIM counter of the other link, the DTIM counter in the next beacon (beacon) closest to the current time in the other link is generally directly determined, and then transmitted in a radio frame.

However, when the transmission time of the radio frame is very close to the transmission time of the next nearest Beacon, the DTIM counter on the other link is determined to be erroneous, so that the STA MLD cannot correctly determine the TBTT corresponding to the DTIM Beacon on the other link.

Disclosure of Invention

The embodiment of the application provides a transmission method and a transmission device, which are used for solving the problem that a STA MLD cannot accurately determine TBTT corresponding to DTIM Beacon on other links.

In a first aspect, an embodiment of the present application provides a transmission method, applied to a first device, where at least two links are established between the first device and a second device, where the at least two links include a first link and a second link, including:

The first device receives a first frame sent by the second device on the first link, wherein the first frame comprises first interval information, and the first interval information is used for indicating a time interval of the second device sending a Beacon message through the second link;

the first device receives a first residual interval number sent by the second device on the second link;

and the first device determines a target Beacon transmission time TBTT of the transmission data indication map DTIM Beacon message transmitted by the second device on the second link according to the first interval information and/or the first residual interval quantity.

In a second aspect, an embodiment of the present application provides a transmission method, which is applied to a second device, where at least two links are established between the second device and a first device, where the at least two links include a first link and a second link, and the method includes:

the second device sends a first frame to the first device on the first link, wherein the first frame comprises first interval information, and the first interval information is used for indicating a time interval for the second device to send a Beacon message through the second link;

The second device transmitting a first number of remaining intervals to the first device over the second link;

wherein the first interval information and/or the first remaining interval number are used to determine a TBTT of the second device transmitting a DTIM Beacon on the second link.

In a third aspect, an embodiment of the present application provides a transmission apparatus, which is applied to a first device, where at least two links are established between the first device and a second device, where the at least two links include a first link and a second link, and the transmission apparatus includes:

a receiving module, configured to receive, by the first device, a first frame sent by the second device on the first link, where the first frame includes first interval information, where the first interval information is used to indicate a time interval during which the second device sends a Beacon packet through the second link;

the receiving module is further configured to receive, by the first device, a first remaining interval number sent by the second device on the second link;

and the determining module is used for determining the TBTT of the DTIM Beacon transmitted by the second device on the second link according to the first interval information and/or the first residual interval quantity by the first device.

In a fourth aspect, an embodiment of the present application provides a transmission apparatus, which is applied to a second device, where at least two links are established between the second device and a first device, where the at least two links include a first link and a second link, and the transmission apparatus includes:

a sending module, configured to send, by the second device, a first frame to the first device on the first link, where the first frame includes first interval information, where the first interval information is used to indicate a time interval in which the second device sends a Beacon packet through the second link;

the sending module is further configured to send, by the second device, a first remaining number of intervals to the first device over the second link;

In a fifth aspect, embodiments of the present application provide a transmission apparatus, including: a transceiver, a processor, a memory;

the memory stores computer-executable instructions;

the processor executing computer-executable instructions stored in the memory, causing the processor to perform the transmission method as described above in the first aspect;

Wherein the processor comprises an application specific integrated circuit ASIC.

In a sixth aspect, an embodiment of the present application provides a transmission apparatus, including: a transceiver, a processor, a memory;

the memory stores computer-executable instructions;

the processor executing computer-executable instructions stored in the memory, causing the processor to perform the transmission method as described in the second aspect above;

In a seventh aspect, embodiments of the present application provide a computer-readable storage medium having stored therein computer-executable instructions for implementing the transmission method according to the first or second aspect above, when the computer-executable instructions are executed by a processor.

In an eighth aspect, embodiments of the present application provide a computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the transmission method according to the first or second aspect above.

In a ninth aspect, an embodiment of the present application provides a chip, including a processing module and a communication interface, where the processing module is configured to implement the transmission method according to the first aspect or the second aspect.

The embodiment of the application provides a transmission method and a transmission device, wherein the method comprises the following steps: the first device receives a first frame sent by the second device on the first link, wherein the first frame comprises first interval information, and the first interval information is used for indicating a time interval for the second device to send a Beacon message through the second link. The first device receives a first number of remaining intervals transmitted by the second device over the second link. And the first equipment determines the TBTT corresponding to the DTIM Beacon transmitted by the second equipment on the second link according to the first interval information and/or the first residual interval quantity. After the first device receives the first frame, the first remaining interval number sent by the second device is received on the second link, so that the correct value of the DTIM counter can be ensured to be obtained, and then the TBTT corresponding to the DTIM Beacon is determined according to the first remaining interval number and the first interval information included in the first frame, so that the first device can be effectively ensured to correctly determine the TBTT corresponding to the DTIM Beacon on the second link.

Drawings

Fig. 1 is a schematic diagram of a communication scenario provided in an embodiment of the present application;

fig. 2 is a schematic link diagram between multiple link devices according to an embodiment of the present application;

Fig. 3 is a schematic diagram of a first implementation of sending a Beacon packet according to an embodiment of the present application;

fig. 4 is a second implementation schematic diagram of sending a Beacon packet according to the embodiment of the present application;

fig. 5 is a schematic parameter diagram of an AP according to an embodiment of the present application;

fig. 6 is a schematic diagram of an implementation of establishing a multi-link connection according to an embodiment of the present application;

fig. 7 is a schematic diagram of a first implementation of a connection response frame according to an embodiment of the present application;

fig. 8 is a second schematic implementation diagram of a connection response frame provided in an embodiment of the present application;

fig. 9 is a flowchart of a transmission method provided in an embodiment of the present application;

fig. 10 is a schematic diagram of a first implementation of determining DTIM information according to an embodiment of the present application;

fig. 11 is a second implementation schematic diagram of determining DTIM information according to an embodiment of the present application;

fig. 12 is a third implementation schematic diagram for determining DTIM information according to an embodiment of the present application;

fig. 13 is a fourth implementation schematic diagram of determining DTIM information according to an embodiment of the present application;

fig. 14 is a fifth implementation schematic diagram of determining DTIM information according to an embodiment of the present application;

fig. 15 is a sixth implementation schematic diagram of determining DTIM information provided in the embodiments of the present application;

fig. 16 is a second flowchart of a transmission method provided in an embodiment of the present application;

fig. 17 is a schematic structural diagram of a transmission device according to an embodiment of the present application;

Fig. 18 is a second schematic structural diagram of the transmission device according to the embodiment of the present application;

fig. 19 is a schematic structural diagram of a transmission device according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of a transmission device according to an embodiment of the present application.

Detailed Description

For better understanding of the technical solutions of the present application, the related art related to the present application is described in further detail below.

802.11be is the next generation WiFi standard, an 802.11be network, also known as Extremely High Throughput (EHT, very high throughput) network, which is enhanced in functionality through a range of system features and mechanisms to achieve very high throughput, 802.11be is a new WLAN standard proposed next to WiFi6 (802.11 ax).

According to the definition of the two communication ends in 802.11, one end is an AP device, and the other end is an STA device, for example, the communication scenario may be understood with reference to fig. 1, and fig. 1 is a schematic diagram of the communication scenario provided in the embodiment of the present application. Referring to fig. 1, in this communication scenario, one end is an AP device and the other end is a STA device.

The AP may be an access point for a mobile user to enter a wired network, and is mainly deployed in a home, a building, or a campus, where a typical coverage radius is several tens meters to hundreds meters, and of course, may be deployed outdoors. The AP is equivalent to a bridge connecting a wired network and a wireless network, and mainly serves to connect each wireless network client together and then access the wireless network to the ethernet. In particular, the AP may be a terminal device or a network device with a wireless-fidelity (WiFi) chip. The AP may be a device supporting the 802.11ax standard. The AP may be a device supporting multiple wireless local area network (wireless local area networks, WLAN) standards such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11 a.

The STA may be a wireless communication chip, a wireless sensor, or a wireless communication terminal. Such as a mobile phone supporting a WiFi communication function, a tablet computer supporting a WiFi communication function, a set top box supporting a WiFi communication function, a smart television supporting a WiFi communication function, a smart wearable device supporting a WiFi communication function, a vehicle communication device supporting a WiFi communication function, and a computer supporting a WiFi communication function. Optionally, the STA may support the 802.11ax standard. The STA may also support multiple WLAN standards such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11 a.

In the actual implementation process, the specific implementation manner of the AP device and the STA device may be selected according to actual requirements, which is not limited in this embodiment, as long as the AP device may be used as an access point, and the STA device may be used as a station.

At present, in 802.11be, a function capable of supporting 802.11 Multiple Links (MLD) is defined, and in the multilink communication, STA MLD (station multilink device) is located at one end and AP MLD (access point multilink device) is located at the other end based on the above description.

Among them, a Multi-link device (MLD) is a device that supports simultaneous data transmission over multiple links. For example, the multi-link device can simultaneously communicate in the frequency bands of 2.4GHz, 5GHz and 60GHz, and even if the number of antennas is limited, the multi-link device can switch in different frequency bands, so that the optimal frequency band is selected, and the communication quality is ensured.

The multi-link STA MLD and the multi-link AP MLD can utilize the advantages of the multi-link to transmit and receive data on a plurality of links so as to achieve the advantages of high throughput, low time delay and the like.

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

It will be appreciated that whether an STA or AP multilink device is a device in nature, the AP MLD described above may include one or more APs, and the STA MLD may include one or more STAs, which may be understood as including one or more virtual entities in the multilink device, where each logical entity communicates data with the other end of the communication via a link, which is a radio resource for transmitting data, respectively.

For example, the multi-link between the AP multi-link device and the STA multi-link device may be understood in conjunction with fig. 2, and fig. 2 is a schematic link diagram between the multi-link devices provided in the embodiments of the present application.

As shown in fig. 2, assuming that AP1, AP2, …, APn are currently included in the AP multi-link device and STA1, STA2, …, STAn are included in the STA multi-link device, where a link (link) 1 is established between AP1 and STA1, a link 2 is established between AP2 and STA2, …, and a link n is established between APn and STAn, in one possible implementation, each AP may operate on a different frequency band, and each STA may operate on a different frequency band, and accordingly, each link established is also a link on a corresponding frequency band.

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 may be selected according to actual requirements, which is not limited in this embodiment.

Based on the above description, the following description is made of the related implementation of Beacon.

In 802.11, the AP synchronizes the AP with the time of the entire basic service set (Basic Service Set, BSS) network by sending a Beacon message, which in one possible implementation is sent by the AP with a time stamp (TimeStamp), and after the STA receives this field, it can synchronize itself with the AP time. And it should be noted that, the BSS refers to a range covered by one AP, and STAs may communicate with each other in a service area of one BSS.

The mechanism of sending a Beacon message by an AP may be understood, for example, with reference to fig. 3, and fig. 3 is a schematic diagram of an implementation of sending a Beacon message provided in an embodiment of the present application.

As shown in fig. 3, the AP expects to send a Beacon message at each TBTT (Targeted Beacon Transmit Time, target Beacon transmission time), and referring to fig. 3, the time for the AP to send the Beacon message may lag behind the TBTT due to an air interface environment or the like.

Referring to fig. 3, where the Time Interval between two TBTTs is a Beacon Interval (Interval), in one possible implementation, the 802.11 standard specifies that the default Beacon Interval value is 100 Time Units (TU), where 1 tu=1024 μs, and in an actual implementation, the specific implementation of the Beacon Interval in which the AP sends a Beacon message may be selected according to the requirement, which is not limited in this embodiment.

Because in 802.11, after the AP and the STA establish a connection, the STA may allow a low Power Save state in which the STA may be in a sleep mode, when the AP buffers a broadcast multicast packet to be transmitted to the STA, the AP needs to have a mechanism to notify the STA that it has a buffered broadcast multicast packet, which in 802.11 is implemented by the DTIM Beacon mechanism of the AP.

Specifically, the AP may initially define a DTIM Period (Period), where the DTIM Period indicates that every few Beacon intervals, the AP will carry the indication information about whether there is a buffered broadcast multicast packet in a Beacon packet sent at this time point, and the Beacon packet is called a DTIM Beacon packet, where a DTIM counter=0 carried in the Beacon packet.

It will be appreciated that the DTIM counter (count) carried in the Beacon message is used to count down until the next DTIM arrives, and that the DTIM count is used to indicate that there are several Beacon intervals to send a DTIM Beacon.

For example, referring to fig. 3, in the example of fig. 3, DTIM period=2 indicates that a DTIM Beacon message is sent once every two Beacon intervals, and the first TBTT in fig. 3 sends a DTIM Beacon message, where a carried DTIM counter=0 indicates that the DTIM Beacon is currently sent; the second TBTT in fig. 3 sends a general Beacon packet, where the carried DTIM counter=1 indicates that there is one Beacon Interval to send the DTIM Beacon; the third TBTT in fig. 3 sends a DTIM Beacon message, where the carried DTIM counter=0 indicates that the DTIM Beacon is currently sent; the fourth TBTT in fig. 3 sends a general Beacon packet, where the carried DTIM counter=1 indicates that there is one Beacon Interval to send a DTIM Beacon; and so on.

For better understanding of the DTIM counter, for example, it may also be described in conjunction with the example in fig. 4, where fig. 4 is a schematic diagram ii of implementation of sending a Beacon packet according to the embodiment of the present application.

The content in fig. 4 is similar to the content in fig. 3, except that the DTIM period=3 in fig. 4, that is, the DTIM Beacon message is sent once every three Beacon intervals, as shown in fig. 4, the first TBTT in fig. 4 sends a DTIM Beacon message, where the carried DTIM counter=0 indicates that the DTIM Beacon is currently sent; the second TBTT in fig. 4 sends a common Beacon packet, where the carried DTIM counter=2 indicates that two more Beacon intervals need to send a DTIM Beacon; the third TBTT in fig. 4 sends a general Beacon packet, where the carried DTIM counter=1 indicates that there is one Beacon Interval to send the DTIM Beacon; the fourth TBTT in fig. 4 sends a DTIM Beacon message, where the carried DTIM counter=0 indicates that the DTIM Beacon is currently sent; and so on.

In one possible implementation, the buffered broadcast and multicast data would be transmitted after the DTIM Beacon. If there are multiple buffered frames, then they are transmitted sequentially.

The relationship between Beacon Interval, DTIM Period, DTIM Count is described above in connection with fig. 3 and 4. In this embodiment, the DTIM Period and the DTIM Count may be collectively referred to as DTIM information.

In 802.11be, beacon Interval, DTIM Period, and DTIM Count of the AP MLD on each link are set independently, and these parameters on different links are not mutually dependent, for example, as can be understood with reference to fig. 5, and fig. 5 is a schematic diagram of parameters of the AP provided in the embodiment of the present application.

As shown in fig. 5, there are two links at the AP MLD, and on Link1, DTIM period=1 of AP1 of the AP MLD, and as shown in fig. 5, each TBTT sends a DTIM Beacon; whereas on Link2, DTIM period=2 for AP2 of AP MLD, common Beacon and DTIM Beacon are transmitted at intervals as shown in fig. 5, and it can be determined with reference to fig. 5 that TBTTs on the two links are also different.

In 802.11be, when the STA MLD and the AP MLD establish a Multi-link (Multi-link) link, that is, when the STA MLD and the AP MLD perform a connection procedure only on any one link, connection parameters on other links are negotiated through information interacted with each other in the connection procedure on the single link, and link connections on other links are also established.

For example, it may be understood in conjunction with fig. 6, where fig. 6 is a schematic implementation diagram of establishing a multilink connection according to an embodiment of the present application.

As shown in fig. 6, it is assumed that the current AP MLD includes AP1, AP2 and AP3, wherein AP1 operates in the 2.4Ghz band, AP2 operates in the 5Ghz band, AP3 operates in the 6Ghz band, and the multi-link Non-network access point (Non-AP MLD) in fig. 6 is a multi-link terminal in the network connected to the multi-link network access point, which can be understood as the STA MLD currently introduced.

Assuming that the current STA MLD and the AP MLD exchange information by two packets of Association Request (connection request) and Association Response (connection response) only on the link at 2.4GHz as shown in fig. 6, three different links can be established between the STA MLD and the AP MLD, which are respectively link1 at 2.4GHz, link2 at 5GHz and link3 at 6GHz as shown in fig. 6. The Link parameters on Link2/Link3, including Beacon Interval, DTIM Period, and DTIM Count, are carried in the packets that interact when a connection is established on Link 1.

In 802.11be, in order to enable better low power consumption of the STA MLD, after the STA MLD and the AP MLD establish multiple links on a certain link, in a default state, only on the link is in a wake or active state, and the STA MLD on other links is in a sleep (Doze) state.

STA MLD may not be forced to listen to Beacon packets on other links in Doze state. For example, as will be understood with reference to fig. 7, fig. 7 is a schematic diagram of implementation of a connection response frame provided in an embodiment of the present application.

As shown in fig. 7, STA MLD performs multi-link establishment on link1, assuming that two links of link1 and link2 are established, where link1 is a link between AP1 and STA1 in fig. 7 and link2 is a link between AP2 and STA2 in fig. 7. After the STA MLD and the AP MLD interact with each other on the link1 and complete the packet containing link1/link2 link information, in a default state, the STA MLD is in an awake/active state on the link1, in a Doze state on the link2, and the link2 defaults on the link2 without monitoring Beacon on the link 2.

Also, in the case illustrated in fig. 7, in the connection response (Associate Response) frame sent by the AP MLD on link1, the AP2 information of the AP MLD on link2 is carried, including DTIM Period/DTIM Count, where the DTIM Period may be negotiated, but for different Beacon, where the DTIM Count may be different, and then it is necessary to determine which Beacon in the connection response frame specifically includes the DTIM Count.

In a possible implementation manner, when determining the DTIM Count of the AP2 included in the connection response frame, for example, the DTIM Count carried in the Beacon nearest to the AP MLD on link2 at this time may be obtained, so as to obtain information included in the connection response frame.

For example, referring to fig. 7, since at the time of sending this connection response frame, the Beacon packet closest to the AP MLD on link2 is the Beacon packet indicated by 701 in fig. 7, it can be determined based on fig. 7 that DTIM count=1 is carried in the Beacon packet, and thus the DTIM Count carried in the connection response frame is also 1.

Based on the above description, the problems in the prior art will be described below.

Based on the above description, it can be determined that in 802.11be, there is no requirement for the AP MLD to send Beacon/DTIM Beacon on different links, i.e. TBTT, beacon interval, DTIM Period, DTIM count, etc. on different links are independent from each other.

When the STA MLD and the AP MLD establish a connection Multi-Link Setup on a certain Link, the time point of the request response sent by the AP MLD on the Link is unpredictable, so that the time points of the Beacon and the connection response frames sent by the AP MLD on other links may be very close.

When such a situation occurs that the time points are very close, DTIM Count information on other links included in the connection response frame may occur due to a time difference in transmission of the connection response frame from the AP MLD to reception of the STA MLD, or the like, and when processed by the STA MLD, the DTIM Count information on the other links may not be correctly reflected.

For example, the description may be taken in conjunction with fig. 8, and fig. 8 is a second schematic implementation diagram of a connection response frame provided in an embodiment of the present application.

As shown in fig. 8, assume that the current STA MLD performs multi-link establishment on link1, and that two links of link1 and link2 are established, where link1 is a link between AP1 and STA1 in fig. 8 and link2 is a link between AP2 and STA2 in fig. 8.

When the AP MLD sends a connection response frame on link1, the closest Beacon packet on link2 from the AP MLD at this time is acquired as a Beacon packet indicated by 801 in fig. 8, and the DTIM Count carried in the Beacon packet is 1 (that is, next Beacon on Link2 is with DTIM Count =1), so that it can be determined that the DTIM count=1 in this connection response frame.

However, since the transmission time of the connection response frame is very close to the transmission time of the Beacon packet (801) of the AP MLD on Link2, when the STA MLD receives and processes the time point of the connection response frame (that is, when the STA1 in fig. 8 transmits the ACK (Acknowledge character, acknowledge character) at the time point, the closest Beacon packet on Link2 from this time point is already the packet indicated by 802 in fig. 8, and the DTIM count=0 in the Beacon packet may further cause the DTIM information on Link2 actually owned by the STA MLD to be erroneous.

After the Multi-Link Setup is completed, the STA MLD defaults to be in a sleep Doze state on Link2, and if the STA MLD does not listen to the Beacon on Link2 for a long time later, the STA MLD may be in an error state for a long time for DTIM information on Link2, which may further cause a data transmission failure.

As a specific example, it may be described with reference to fig. 8, for example, after the current STA MLD receives the connection response frame, it determines that the DTIM period on link2 is 2 according to the DTIM information of link1 included in the connection response frame, and determines that the DTIM counter carried by the next Beacon packet on link2 is 1, and then the STA MLD determines that another Beacon interval AP will send a DTIM Beacon on link 2.

According to the above description of fig. 8, when the STA MLD receives and processes the connection response frame, the Beacon packet closest to this point in time on Link2 is the packet indicated by 802 in fig. 8, the STA MLD determines that the information in the connection response frame is determined according to the Beacon packet indicated by 802, because the STA MLD determines that there is another Beacon interval AP from the connection response frame to send the DTIM Beacon on Link2, so the current STA MLD determines that the packet indicated by 803 in fig. 8 is the DTIM Beacon packet according to the connection response frame, but in fact the packet indicated by 802 is only the actual DTIM Beacon packet, and then by analogy, the determination of the STA MLD on the DTIM information on Link2 is in an error state for a long time.

The root cause of the above problem arises because the beacons on other links and the AP MLD send connection response frames on this link very close in time, resulting in the situation that the next nearest Beacon message actually relied on in the connection response frame and the next nearest Beacon message considered by the STA MLD in the connection response frame are not the same Beacon message, and thus the above error occurs.

Aiming at the problems in the prior art, the application provides the following technical conception: after the STA MLD receives the connection response frame, the Beacon may be received on other links, so that a correct DTIM count is obtained from the received Beacon, so as to avoid the problem that the STA MLD is in an error state for the DTIM information on Link2 for a long time, and further effectively improve the accuracy of data transmission.

Based on the foregoing description, the transmission method provided in the present application will be described in detail with reference to a specific embodiment, where the present embodiment may be applied to a first device, where at least two links are established between the first device and a second device in the present embodiment, and the at least two links may include a first link and a second link, where the first device may be, for example, the STA MLD described above, and the second device may be the AP MLD described above; alternatively, the first device may be, for example, the AP MLD described above, and the second device may be the STA MLD described above, which in this embodiment does not limit the specific implementation manner of the first device and the second device, and also does not limit the specific number of links between the first device and the second device, and may be selected and extended according to actual requirements.

In the following, taking the first device as STA MLD and the second device as AP MLD as an example, the description will be made with reference to fig. 9, and fig. 9 is a flowchart of a transmission method provided in an embodiment of the present application.

As shown in fig. 9, the method includes:

s901, a first device receives a first frame sent by a second device on a first link, wherein the first frame comprises first interval information, and the first interval information is used for indicating a time interval of the second device sending Beacon messages through the second link.

In this embodiment, the first device may be an STA multilink device, the second device may be an AP multilink device, and the first link may be any one of multiple links between the first device and the second device, and it may be determined based on the foregoing description that, when the multilink link is established, the STA MLD and the AP MLD are allowed to perform a connection procedure only on any one link, and the current first link is a link for performing the connection procedure.

The first device may receive, on the first link, a first frame sent by the second device, where the first frame may be, for example, the connection response frame described above, and the first frame includes first interval information, where the first interval information is used to indicate a time interval for the second device to send a Beacon packet through the second link, and it is understood that the current first interval information is a Beacon interval for the AP multilink device to send the Beacon packet on the second link, which is described in the foregoing embodiments and is not repeated herein.

S902, the first device receives, on the second link, the first remaining number of intervals sent by the second device.

And in this embodiment, the first device may receive, on the second link, the first remaining number of intervals sent by the second device, where the first remaining number of intervals may be, for example, the value of the DTIM counter described above.

In one possible implementation manner, the first device may, for example, receive, on the second link, a Beacon packet sent by the second device, and then obtain a DTIM counter carried in the Beacon, so as to obtain the first remaining number of intervals.

It will be appreciated that the number of remaining intervals is still included in the first frame, but it may be determined based on the above description that the number of remaining intervals included in the first frame may be incorrect, so that the current first device may receive the Beacon message sent by the second device on the second link, so that it may be ensured that the correct number of first remaining intervals is obtained.

S903, the first device determines a TBTT of the second device for transmitting the DTIM Beacon on the second link according to the first interval information and/or the first remaining interval number.

After the first device obtains the first interval indication information and the first remaining interval number, the first remaining interval number is used for indicating that the DTIM Beacon message is to be sent by the other Beacon intervals, and the first interval information can indicate the length of the Beacon interval, so that the first device can determine the TBTT of the second device for transmitting the DTIM Beacon on the second link according to the first interval information and/or the first remaining interval number.

In this embodiment, the first interval information may be carried in the first frame. Or in a possible implementation manner, the Beacon packet received by the first device on the second link may further include first interval information, so that the first interval information in this embodiment may also be obtained from the Beacon packet, that is, in this embodiment, the DTIM information of the second link may be determined together depending on the first frame and the Beacon packet received on the second link, or the DTIM information of the second link may be determined only according to the Beacon packet received on the second link, and in an actual implementation process, a specific determination manner of the DTIM information may be selected according to actual requirements, which is not limited in this embodiment.

Based on the above description, it may be determined that whether there is a broadcast multicast packet sent through the link currently may be indicated in the DTIM Beacon, and the specific implementation manner may refer to the description of the above embodiment, which is not repeated herein.

The transmission method provided by the embodiment of the application comprises the following steps: the first device receives a first frame sent by the second device on the first link, wherein the first frame comprises first interval information, and the first interval information is used for indicating a time interval for the second device to send a Beacon message through the second link. The first device receives a first number of remaining intervals transmitted by the second device over the second link. The first device determines a TBTT of the second device for transmitting the DTIM Beacon on the second link according to the first interval information and/or the first residual interval number. After the first device receives the first frame, the first remaining interval number sent by the second device is received on the second link, so that the correct value of the DTIM counter can be ensured to be obtained, and then the TBTT corresponding to the DTIM Beacon is determined according to the first remaining interval number and the first interval information included in the first frame, so that the first device can be effectively ensured to correctly determine the TBTT corresponding to the DTIM Beacon on the second link.

On the basis of the foregoing embodiments, a transmission method provided by the embodiments of the present application will be described in further detail with reference to fig. 10, and fig. 10 is a schematic diagram of implementation of determining DTIM information provided by the embodiments of the present application.

In this embodiment, the first device may be an STA MLD device, and the second device may be an AP MLD device, as shown in fig. 10, and it is assumed that the current STA MLD performs multi-link establishment on a first link, and it is assumed that two links, i.e., a first link between AP1 and STA1 in fig. 10 and a second link between AP2 and STA2 in fig. 10, are established.

The STA MLD device may receive the first frame transmitted by the AP MLD device, that is, the connection response frame shown in fig. 10, on the first link, and it may be understood that the first interval information is included in the connection response frame, where the first interval information is actually a Beacon interval on the second link, and further includes a DTIM counter in the connection response frame, and it may be determined based on the foregoing description that the DTIM counter included in the connection response frame is actually a DTIM counter carried in a Beacon message indicated by 1000 in fig. 10, that is, the DTIM counter=1 included in the connection response frame, but it may be determined based on the foregoing analysis that the number of remaining intervals currently included in the connection response frame may be erroneous because the transmission time of the current connection response frame and the transmission time of the Beacon message indicated by 1000 are very close.

In this embodiment, the STA MLD device may receive the Beacon packet sent by the AP MLD device on the second link, and obtain the first remaining interval number from the Beacon packet, so that the correct remaining interval number may be obtained by itself, and based on the above description, it may be determined that the STA MLD is in a sleep state on the remaining links after finishing the data packet interaction on the first link, and referring to fig. 10, the STA MLD is in a sleep state on the second link after finishing the data packet interaction on the first link, and in this embodiment, the STA MLD needs to receive the Beacon packet sent by the AP MLD device on the second link, and then needs to place the first device in a wake-up or active state on the second link, so that the Beacon packet is received on the second link, for example, the first device may determine TBTT information on the second link according to the connection response frame, so that the TBTT on the second link is placed in a wake-up or active state, so that the Beacon packet is received on the second link.

In one possible implementation, the first device may determine, for example, based on the first interval information, a first time at which the first Beacon packet is received on the second link; the first device receives a first Beacon message sent by the second device on the second link at a first time, wherein the first Beacon message includes the first remaining number of intervals, and the first device is in a wake-up or active state on the second link at the first time.

The first Beacon message may be a Beacon message sent by the second device on the second link, where the receiving time is after the first device receives the first frame, that is, the first Beacon message in this embodiment may be any Beacon message sent by the second device on the second link after the first device receives the connection response frame, which is not limited in this embodiment.

As will be understood with reference to fig. 10, for example, after receiving the connection response frame, the sta MLD may determine, for example, a Beacon interval on the second link according to the connection response frame, and then determine, according to the Beacon interval, each TBTT of the Beacon packet sent by the AP MLD on the second link, so that the first time of receiving the first Beacon packet on the second link may be determined.

The first Beacon packet may be, for example, a Beacon packet indicated by 1001 in fig. 10, where the first time corresponding to the Beacon packet is TBTT1 shown in fig. 10; or, the first Beacon packet may also be a Beacon packet indicated by 1002 in fig. 10, where the first time corresponding to the Beacon packet is TBTT2 described in fig. 10, in the actual implementation process, the specific implementation manner of the first Beacon packet may be selected according to the actual requirement, and after the STA MLD receives the connection response frame, the Beacon packet sent by the AP MLD on the second link may be used as the first Beacon packet in this embodiment.

Taking the example that the first Beacon packet is the Beacon packet indicated by 1001 in fig. 10, the first time when the first Beacon packet is received on the second link is currently determined to be the time indicated by TBTT1 in fig. 10, then, referring to fig. 10, the sta MLD may be in a wake-up or active state on the second link, for example, at the time point corresponding to TBTT1, to receive the Beacon packet 1001 sent by the AP MLD on the second link, and obtain the correct DTIM counter on the second link from the Beacon packet indicated by 1001, so as to obtain the correct first remaining interval number.

Or the first Beacon message may also be a Beacon message indicated by 1002 in fig. 10, and its implementation is similar and will not be described herein.

In this embodiment, there are several possible implementations of STA MLD for receiving Beacon messages on the second link, and several possible implementations are described below. For example, it can be understood with reference to fig. 11 to fig. 13, fig. 11 is a second implementation schematic diagram of determining DTIM information provided in an embodiment of the present application, fig. 12 is a third implementation schematic diagram of determining DTIM information provided in an embodiment of the present application, and fig. 13 is a fourth implementation schematic diagram of determining DTIM information provided in an embodiment of the present application.

As shown in fig. 11, for example, after receiving the connection response frame on the first link, the STA MLD may acquire the next TBTT (e.g., TBTT1 in fig. 11) of the second link closest to the current moment, then receive the Beacon packet at the time point, and if the Beacon packet is received correctly at the TBTT, then it may not be necessary to receive the Beacon packet on the second link later, and referring to fig. 11, after the STA MLD receives the Beacon packet on the second link at the time point corresponding to TBTT1, the STA MLD is in a sleep state on the second link later.

Or if the Beacon message is not correctly received at the TBTT, the next nearest TBTT (e.g. TBTT2 in fig. 10) may be obtained again, then the Beacon message is received at the time point, and so on, until the Beacon message is correctly received on the second link, then the Beacon message is not required to be received again, so that the correct and effective DTIM counter on the second link may be ensured to be obtained.

Alternatively, as shown in fig. 12, after receiving the connection response frame on the first link, the STA MLD may also perform reception of the Beacon packet on the second link at each TBTT, for example, the STA MLD wakes up at TBTT1 in fig. 12, so as to receive the Beacon packet indicated by 1201 on the second link, and the STA MLD wakes up at TBTT2 in fig. 12, so as to receive the Beacon packet indicated by 1202 on the second link, and the STA MLD wakes up at TBTT3 in fig. 12, so as to receive the Beacon packet indicated by 1203 on the second link, and so on, so as to ensure that the STA MLD can obtain the valid DTIM counter on the second link.

Or, as shown in fig. 13, after receiving the connection response frame on the first link, the STA MLD may further perform reception of the Beacon packet on the second link at a preset number of Beacon intervals, for example, see fig. 13, and currently, there are TBTT1, TBTT2, TBTT3, TBTT4, TBTT5, TBTT6, and … in time sequence, and assuming that reception of the Beacon packet is performed on the second link every 2 Beacon packets, as shown in fig. 13, for example, the STA MLD may wake up on the second link at a TBTT1 time point, perform reception of the Beacon packet indicated by 1302, then the STA MLD may wake up on the second link at a TBTT3 time point, perform reception of the Beacon packet indicated by 1303, and then the STA MLD wakes up on the second link at a TBTT5 time point, and so on, and in turn, so on, so as to ensure that the correct DTIM counter on the second link is obtained.

After the first remaining interval number and the first interval information are determined, it is determined that the second device transmits the TBTT corresponding to the DTIM Beacon on the second link, and in summary, in the transmission method provided in the embodiment of the present application, after the first device receives the first frame sent by the second device, the first device wakes up at the TBTT time corresponding to the second link, so as to receive the first remaining interval number sent by the second device on the second link, thereby effectively ensuring that the first device can accurately determine the TBTT corresponding to the DTIM Beacon on the second link. The wake state described above may also be an active state.

On the basis of the foregoing embodiment, another possible implementation manner of determining the correct DTIM counter by the first device will be described with reference to fig. 14, and fig. 14 is a schematic diagram five of implementation of determining DTIM information provided in the embodiment of the present application.

In another possible implementation manner, the first frame further includes a second remaining interval number of the second link and/or first indication information, where the first indication information is used to indicate the second remaining interval number to be the remaining interval number included in the Beacon packet sent by the second device on the second link at the first target sending time.

That is, the second remaining number of intervals included in the first frame may be used to determine DTIM information of the second link, but an additional indication information needs to be carried in the first frame, where the indication information indicates which TBTT of the second link the DTIM counter on the second link is currently carried to send in a Beacon message, where the first indication information may be, for example, a value of a first Target Beacon Transmission Time (TBTT); alternatively, the first indication information may also be an offset of a value of the first target transmission time (TBTT).

For example, as can be understood with reference to fig. 14, it is assumed that the current STA MLD performs multi-link establishment on a first link, which is a link between AP1 and STA1 in fig. 14, and a second link, which is a link between AP2 and STA2 in fig. 14, is assumed that both the first link and the second link are established.

When the AP MLD sends the connection response frame on the first link, the next latest Beacon packet on the corresponding second link is a Beacon packet indicated by 1401 in fig. 14, as can be determined by referring to fig. 14, and the DTIM counter carried in the Beacon packet indicated by 1401=1, then it can be determined that the second remaining interval number in the connection response frame is 1, and meanwhile, the connection response frame also carries first indication information, where the first indication information may be, for example, a value of TBTT2 or an offset (offset) of TBTT2, so that the first indication information may indicate that the DTIM counter included in the current connection response frame is the DTIM counter carried in the Beacon packet corresponding to TBTT 2.

In this way, when the STA MLD processes the connection response frame, although the Beacon message at the TBTT2 moment corresponding to the connection response frame is already sent, the STA MLD can still determine that the DTIM counter of the connection response frame is the Beacon message at the TBTT2 moment corresponding to the connection response frame through the additional first indication information carried in the connection response frame, so that the STA MLD can still have the correct DTIM information on the second link based on the second remaining number of intervals and the first indication information included in the connection response frame.

In one possible implementation manner, after the first device receives the first frame sent by the second device on the first link, the first device may determine, according to the first interval information, the second remaining interval number, and the first indication information, a time when the second device transmits the DTIM Beacon message on the second link, where the first indication information specifically indicates that the second remaining interval number is determined according to the Beacon on the second link, so that it may be ensured that the first device may obtain the correct DTIM information on the second link, and further may effectively ensure that the first device may correctly determine the TBTT corresponding to the DTIM Beacon on the second link.

And in another possible implementation manner, when the STA MLD and the AP MLD perform multi-link establishment on a certain link, the AP MLD may select, for example, a sending time point of the connection response frame, so that there may be a distance of a certain time threshold between this time point and the nearest Beacon packet on other links, and the connection response frame still carries a DTIM Count of the nearest Beacon packet on other links. Because the sending time point of the connection response frame is limited, the situation that the sending time of the connection response frame is very close to the sending time of the next nearest Beacon message on the second link is avoided, and therefore the occurrence of the error of the DTIM information can be avoided.

For example, a time interval between the transmission time of the first frame and a second TBTT of a second Beacon packet on the second link is greater than or equal to a preset duration, where the second Beacon packet is a Beacon packet having a TBTT after the transmission time of the first frame and closest to the transmission time of the first frame;

the first frame further includes a third remaining number of intervals carried in the second Beacon packet.

That is, when determining the sending time of the connection response frame, the second Beacon packet that is the latest after the sending time of the connection response frame may be acquired on the second link, so that the time interval between the sending time of the connection response frame and the second TBTT of the second Beacon packet is greater than or equal to the preset duration, where a specific implementation manner of the preset duration may be selected according to the actual requirement, which is not limited in this embodiment.

For example, it may be understood in conjunction with fig. 15, where fig. 15 is a schematic diagram sixth of implementation of determining DTIM information provided in an embodiment of the present application.

As shown in fig. 15, when the AP MLD sends a connection response frame on the first link, a sending time point may be selected, so that the time point is staggered with a time from a latest Beacon packet on the second link, and the connection response frame carries a DTIM counter in the latest Beacon packet on the second link determined above, that is, a DTIM counter of the Beacon packet 1501 corresponding to TBTT3 in fig. 15.

It will be appreciated that when determining the transmission time point of the connection response frame, the transmission time point of the next Beacon packet closest on the second link may be determined first, for example, may be TBTT2 in fig. 15, and it is assumed that the transmission time of the connection response frame is determined currently according to the Beacon packet corresponding to TBTT2, but it may be determined based on the foregoing that the transmission time point between TBTT2 and the connection response frame is very close, that is, the time interval between the transmission time points between TBTT2 and the connection response frame is less than the preset duration, so the currently determined transmission time of the connection response frame is not available.

And then continuing to select the next Beacon message on the second link, that is, the Beacon message 1501 corresponding to the TBTT3 in fig. 15, assuming that the transmission time point of the connection response frame shown in fig. 15 is currently determined based on the Beacon message 1501, it can be determined that the second target transmission time TBTT2 of the Beacon message 1501 and the transmission time of the connection response frame can satisfy the above-described relationship, that is, the TBTT3 of the Beacon message 1501 is after the transmission time of the connection response frame, and the time interval between the TBTT3 of the Beacon message 1501 and the transmission time of the connection response frame is greater than or equal to the preset duration, so that the third remaining interval number in the connection response frame can be determined according to the DTIM counter carried in the Beacon message 1501 corresponding to the TBTT3, and the connection response frame is transmitted at the determined transmission time point.

Thus, when the STA MLD receives and processes the connection response frame, the next latest Beacon packet on the corresponding second link is also the Beacon packet 1501 corresponding to TBTT3, where the DTIM counter=0 carried in the Beacon packet, so that it can be ensured that the STA MLD can have correct DTIM information on the second link.

On the basis of the above embodiments, after determining that the second device transmits the TBTT of the DTIM Beacon packet on the second link, if it is determined that the second device caches the data to be transmitted through the second link, the first device receives, on the second link, the data packet sent by the second device, where the first device is in the awake state on the second link at the TBTT of the DTIM Beacon packet transmitted.

Therefore, the first device in this embodiment can correctly receive data based on the determined correct DTIM information.

In summary, in the transmission method provided in the embodiment of the present application, during the process of establishing multiple links on a link between the STA MLD and the AP MLD, or after the establishment of multiple links is completed, the STA MLD may accurately obtain DTIM information of the AP MLD on all links through selection of a suitable scheme. The scheme can comprise the following steps:

After the STA MLD and the AP MLD complete the establishment of multiple links on one link, the STA MLD actively transmits the corresponding Beacon message to other links; and/or the number of the groups of groups,

the AP MLD carries Beacon information (first indication information) corresponding to the DTIM counter on each link; and/or the number of the groups of groups,

the AP MLD selects a proper time point to send the connection response frame, so that the time interval between the sending time of the connection response frame and the sending time of the Beacon message on the second link according to the time interval is larger than or equal to the preset duration.

The three possible implementations described above are all described in detail in the above embodiments, and are not repeated here. It will be appreciated that in the actual implementation process, the three ways described above may be combined at will according to the actual situation, or any one of them may be selected for implementation, which is not particularly limited in this embodiment.

Based on the transmission method provided by the embodiment of the application, the 802.11be STA MLD can accurately obtain the DTIM information of the AP MLD on all links, and after the 802.11be STA MLD obtains the correct DTIM information on all links, the STA MLD can be correctly synchronized with the AP MLD on each link.

The foregoing embodiments describe an implementation manner on the first device side, and the following description describes an implementation manner on the second device side with reference to fig. 16, where fig. 16 is a flowchart two of the transmission method provided in the embodiment of the present application.

S1601, the second device sends a first frame to the first device on the first link, where the first frame includes first interval information, where the first interval information is used to indicate a time interval during which the second device sends a Beacon packet through the second link.

S1602, the second device transmits a first remaining number of intervals to the first device over a second link.

Wherein the first interval information and/or the first number of remaining intervals is used to determine a TBTT at which the second device transmits the DTIM Beacon on the second link.

The second device in this embodiment may send a Beacon packet to the first device on the second link, where the Beacon packet may include the first remaining number of intervals, and the Beacon packet may further carry the first interval information, where an implementation manner of the second device is similar to that described in the foregoing embodiment.

Various possible implementations in this embodiment are similar to those described in the above embodiments, and are not repeated here.

The transmission method provided by the embodiment of the application comprises the following steps: the second device sends a first frame to the first device on the first link, wherein the first frame comprises first interval information, and the first interval information is used for indicating a time interval for the second device to send the Beacon message through the second link. The second device sends a first number of remaining intervals to the first device over the second link, wherein the first interval information and/or the first number of remaining intervals is used to determine a TBTT at which the second device transmits DTIM beacons over the second link. The second device sends the first frame to the first device, the first frame comprises first interval information, and the second device sends first remaining interval time to the first device on the second link, so that the first device can receive correct first remaining interval time, and then determines TBTT corresponding to the DTIM Beacon according to the first remaining interval number and the first interval information included in the first frame, so that the first device can effectively determine TBTT corresponding to the DTIM Beacon on the second link.

Fig. 17 is a schematic structural diagram of a transmission device according to an embodiment of the present application. Referring to fig. 17, the transmitting device 170 may include a receiving module 1701 and a determining module 1702, wherein,

a receiving module 1701, configured to receive, by the first device, a first frame sent by the second device on the first link, where the first frame includes first interval information, where the first interval information is used to indicate a time interval during which the second device sends a Beacon packet through the second link;

the receiving module 1701 is further configured to receive, by the first device, a first remaining number of intervals sent by the second device on the second link;

a determining module 1702, configured to determine, by the first device, a TBTT of transmitting, by the second device, a DTIM Beacon on the second link according to the first interval information and/or the first remaining interval number.

In one possible implementation, the receiving module 1701 is specifically configured to:

the first device determines a first moment of receiving a first Beacon message on the second link according to the first interval information;

the first device receives a first Beacon message sent by the second device on the second link at the first time, wherein the first Beacon message comprises the first remaining interval number, and the first device is in an awake state on the second link at the first time.

In a possible implementation manner, the first frame further includes a second remaining interval number of the second link and/or first indication information, where the first indication information is used to indicate that the second remaining interval number is a remaining interval number included in a Beacon packet sent by the second device on the second link at the first TBTT.

In one possible implementation, the determining module 1702 is further configured to:

after the first device receives the first frame sent by the second device on the first link, determining, according to at least one of the first interval information, the second remaining interval number and the first indication information, a TBTT of the second device transmitting a DTIM Beacon message on the second link.

In a possible implementation manner, the first indication information is the value of the first TBTT; or,

the first indication information is an offset of the value of the first TBTT.

In a possible implementation manner, a time interval between the transmission time of the first frame and a second TBTT of a second Beacon packet on a second link is greater than or equal to a preset duration, where the second Beacon packet is a Beacon packet having a TBTT after the transmission time of the first frame and closest to the transmission time of the first frame;

The first frame further includes a third remaining interval number carried in the second Beacon packet.

In one possible implementation, the receiving module 1701 is further configured to:

after the second device determines that the second device transmits the TBTT of the DTIM Beacon on the second link, if the second device determines that the second device caches the data to be transmitted through the second link, the first device receives the data packet sent by the second device on the second link, wherein the first device is in a wake-up state on the second link at the TBTT of the DTIM Beacon.

The transmission device provided in the embodiment of the present application may execute the technical solution shown in the foregoing method embodiment, and its implementation principle and beneficial effects are similar, and will not be described herein again.

Fig. 18 is a schematic structural diagram of a transmission device according to an embodiment of the present application. Referring to fig. 18, the transmission apparatus 180 may include a transmitting module 1801, wherein,

a sending module 1801, configured to send, by the second device, a first frame to the first device on the first link, where the first frame includes first interval information, where the first interval information is used to indicate a time interval during which the second device sends a Beacon packet through the second link;

The sending module 1801 is further configured to send, by the second device, a first remaining number of intervals to the first device over the second link;

In one possible implementation, the sending module 1801 is specifically configured to:

the second device determines a first moment of sending a first Beacon message on the second link according to the first interval information;

the second device sends a first Beacon message to the first device on the second link at the first time, wherein the first Beacon message includes the first remaining interval number, and the first device is in an awake state on the second link at the first time.

In one possible implementation manner, at least one of the first interval information, the second remaining interval number and the first indication information is used to determine a TBTT of the second device transmitting the DTIM Beacon message on the second link.

the first indication information is an offset of the value of the first TBTT.

In one possible implementation, the sending module 1801 is further configured to:

and if the second device is determined to cache the data to be transmitted through the second link, the second device sends a data packet on the second link at the TBTT of the DTIM Beacon.

Fig. 19 is a schematic structural diagram of a transmission device according to an embodiment of the present application. Referring to fig. 19, the transmission apparatus 190 may include: a transceiver 21, a memory 22, a processor 23. The transceiver 21 may include: a transmitter and/or a receiver. The transmitter may also be referred to as a transmitter, transmit port, transmit interface, or the like, and the receiver may also be referred to as a receiver, receive port, receive interface, or the like. The transceiver 21, the memory 22, and the processor 23 are illustratively interconnected by a bus 24. The memory 22 is used for storing program instructions; the processor 23 is configured to execute the program instructions stored in the memory, so as to cause the transmission device 190 to execute any one of the above-described transmission methods. In this embodiment, an application specific integrated circuit (Application Specific Integrated Circuit, ASIC) is included in the processor. Wherein the receiver of the transceiver 21 may be adapted to perform the receiving function of the transmitting device in the above-described transmission method.

Fig. 20 is a schematic structural diagram of a transmission device according to an embodiment of the present application. Referring to fig. 20, the transmission apparatus 200 may include: a transceiver 31, a memory 32, a processor 33. The transceiver 31 may include: a transmitter and/or a receiver. The transmitter may also be referred to as a transmitter, transmit port, transmit interface, or the like, and the receiver may also be referred to as a receiver, receive port, receive interface, or the like. Illustratively, the transceiver 31, the memory 32, and the processor 33 are interconnected by a bus 34. The memory 32 is used for storing program instructions; the processor 33 is configured to execute the program instructions stored in the memory, so as to cause the transmission apparatus 200 to execute any one of the above-described transmission methods. In this embodiment, the processor includes an ASIC. The receiver of the transceiver 31 may be used to perform the receiving function of the transmitting device in the above-mentioned transmitting method.

Embodiments of the present application provide a computer-readable storage medium having stored therein computer-executable instructions for implementing the above-described transmission method when the computer-executable instructions are executed by a processor.

Embodiments of the present application may also provide a computer program product, which may be executed by a processor, and when the computer program product is executed, may implement a transmission method executed by any of the above-mentioned terminal devices or network devices.

The embodiment of the application also provides a chip, which comprises: the processing module and the communication interface, the processing module can execute the technical scheme of the transmission equipment in the foregoing method embodiment. Further, the chip further includes a storage module (e.g., a memory), where the storage module is configured to store the instructions, and the processing module is configured to execute the instructions stored in the storage module, and execution of the instructions stored in the storage module causes the processing module to execute the technical solution of the transmission device in any of the foregoing method embodiments.

The terminal device, the computer readable storage medium and the computer program product of the embodiments of the present application may execute the transmission method described in the foregoing embodiments, and specific implementation processes and beneficial effects of the transmission method are referred to above and are not described herein again. In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The aforementioned computer program may be stored in a computer readable storage medium. The computer program, when executed by a processor, implements steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

A transmission method, applied to a first device, wherein at least two links are established between the first device and a second device, and the at least two links include a first link and a second link, the method comprising:

the first device receives a first frame sent by the second device on the first link, wherein the first frame comprises first interval information, and the first interval information is used for indicating a time interval of the second device sending a Beacon message through the second link;

the first device receives a first residual interval number sent by the second device on the second link;

And the first device determines a target Beacon transmission time TBTT of the transmission data indication map DTIM Beacon message transmitted by the second device on the second link according to the first interval information and/or the first residual interval quantity.
The method of claim 1, wherein the first device receiving a first number of remaining intervals transmitted by the second device over the second link comprises:

the first device determines a first moment of receiving a first Beacon message on the second link according to the first interval information;

the first device receives a first Beacon message sent by the second device on the second link at the first time, wherein the first Beacon message comprises the first remaining interval number, and the first device is in an awake state on the second link at the first time.
The method according to claim 1 or 2, wherein the first frame further comprises a second number of remaining intervals of the second link and/or first indication information, where the first indication information is used to indicate the second number of remaining intervals as the number of remaining intervals included in a Beacon packet sent by the second device on the second link at the first TBTT.
The method of claim 3, wherein the first device receives the first frame sent by the second device over the first link, the method further comprising:

and determining the TBTT of the DTIM Beacon message transmitted by the second equipment on the second link according to at least one of the first interval information, the second residual interval number and the first indication information.
The method according to claim 3 or 4, wherein the first indication information is the value of the first TBTT; or,

the first indication information is an offset of the value of the first TBTT.
The method according to any one of claims 1-5, wherein a time interval between the transmission time of the first frame and a second TBTT of a second Beacon message on a second link is greater than or equal to a preset duration, the second Beacon message being a Beacon message having a TBTT after the transmission time of the first frame and closest to the transmission time of the first frame;

the first frame further includes a third remaining interval number carried in the second Beacon packet.
The method according to any of claims 1-6, wherein the determining that the second device is transmitting a point in time on the second link at which the transfer data indicates a target Beacon transmit time TBTT for mapping DTIM Beacon messages, the method further comprising:

And if the second device caches the data to be transmitted through the second link, receiving the data packet sent by the second device on the second link by the first device in the TBTT of the DTIM Beacon, wherein the first device is in a wake-up state on the second link in the TBTT of the DTIM Beacon.
A transmission method, applied to a second device, wherein at least two links are established between the second device and a first device, and the at least two links include a first link and a second link, the method comprising:

the second device sends a first frame to the first device on the first link, wherein the first frame comprises first interval information, and the first interval information is used for indicating a time interval for the second device to send a Beacon message through the second link;

the second device transmitting a first number of remaining intervals to the first device over the second link;

wherein the first interval information and/or the first remaining interval number are used to determine a TBTT of the second device transmitting a DTIM Beacon on the second link.
The method of claim 8, wherein the second device transmitting a first remaining number of intervals to the first device over the second link comprises:

The second device determines a first moment of sending a first Beacon message on the second link according to the first interval information;

the second device sends a first Beacon message to the first device on the second link at the first time, wherein the first Beacon message includes the first remaining interval number, and the first device is in an awake state on the second link at the first time.
The method according to claim 8 or 9, wherein the first frame further comprises a second number of remaining intervals of the second link and/or first indication information, where the first indication information is used to indicate the second number of remaining intervals as the number of remaining intervals included in a Beacon packet sent by the second device on the second link at the first TBTT.
The method of claim 10, wherein at least one of the first interval information, the second number of remaining intervals, and the first indication information is used to determine a TBTT of the second device transmitting DTIM Beacon messages over the second link.
The method according to claim 10 or 11, wherein the first indication information is the value of the first TBTT; or,

The first indication information is an offset of the value of the first TBTT.
The method according to any one of claims 8-12, wherein a time interval between the transmission time of the first frame and a second TBTT of a second Beacon message on a second link is greater than or equal to a preset duration, the second Beacon message being a Beacon message having a TBTT after the transmission time of the first frame and closest to the transmission time of the first frame;

the first frame further includes a third remaining interval number carried in the second Beacon packet.
The method according to any one of claims 8-13, further comprising:

and if the second device is determined to cache the data to be transmitted through the second link, the second device sends a data packet on the second link at the TBTT of the DTIMBeacon.
A transmission apparatus for use with a first device, wherein at least two links are established between the first device and a second device, wherein the at least two links include a first link and a second link, the apparatus comprising:

a receiving module, configured to receive, by the first device, a first frame sent by the second device on the first link, where the first frame includes first interval information, where the first interval information is used to indicate a time interval during which the second device sends a Beacon packet through the second link;

The receiving module is further configured to receive, by the first device, a first remaining interval number sent by the second device on the second link;

and the determining module is used for determining the TBTT of the DTIM Beacon transmitted by the second device on the second link according to the first interval information and/or the first residual interval quantity by the first device.
The apparatus of claim 15, wherein the receiving module is specifically configured to:

the first device determines a first moment of receiving a first Beacon message on the second link according to the first interval information;

the first device receives a first Beacon message sent by the second device on the second link at the first time, wherein the first Beacon message comprises the first remaining interval number, and the first device is in an awake state on the second link at the first time.
The apparatus according to claim 15 or 16, wherein the first frame further comprises a second number of remaining intervals of the second link and/or first indication information, where the first indication information is used to indicate the second number of remaining intervals is the number of remaining intervals included in a Beacon packet sent by the second device on the second link at the first TBTT.
The apparatus of claim 17, wherein the means for determining is further configured to:

after the first device receives the first frame sent by the second device on the first link, determining, according to at least one of the first interval information, the second remaining interval number and the first indication information, a TBTT of the second device transmitting a DTIM Beacon message on the second link.
The apparatus according to claim 17 or 18, wherein the first indication information is the value of the first TBTT; or,

the first indication information is an offset of the value of the first TBTT.
The apparatus of any one of claims 15-19, wherein a time interval between the transmission time of the first frame and a second TBTT of a second Beacon message on a second link is greater than or equal to a preset duration, the second Beacon message being a Beacon message having a TBTT after the transmission time of the first frame and closest to the transmission time of the first frame;

the first frame further includes a third remaining interval number carried in the second Beacon packet.
The apparatus of any one of claims 15-20, wherein the receiving module is further configured to:

After the second device determines that the second device transmits the TBTT of the DTIM Beacon on the second link, if the second device determines that the second device caches the data to be transmitted through the second link, the first device receives the data packet sent by the second device on the second link, wherein the first device is in a wake-up state on the second link at the TBTT of the DTIM Beacon.
A transmission apparatus for use with a second device, wherein at least two links are established between the second device and a first device, wherein the at least two links include a first link and a second link, the apparatus comprising:

a sending module, configured to send, by the second device, a first frame to the first device on the first link, where the first frame includes first interval information, where the first interval information is used to indicate a time interval in which the second device sends a Beacon packet through the second link;

the sending module is further configured to send, by the second device, a first remaining number of intervals to the first device over the second link;

wherein the first interval information and/or the first remaining interval number are used to determine a TBTT of the second device transmitting a DTIM Beacon on the second link.
The apparatus of claim 22, wherein the sending module is specifically configured to:

the second device determines a first moment of sending a first Beacon message on the second link according to the first interval information;

the second device sends a first Beacon message to the first device on the second link at the first time, wherein the first Beacon message includes the first remaining interval number, and the first device is in an awake state on the second link at the first time.
The apparatus according to claim 22 or 23, wherein the first frame further comprises a second number of remaining intervals of the second link and/or first indication information, where the first indication information is used to indicate the second number of remaining intervals is the number of remaining intervals included in a Beacon packet sent by the second device on the second link at the first TBTT.
The apparatus of claim 24, wherein at least one of the first interval information, the second number of remaining intervals, and the first indication information is used to determine a TBTT of the second device transmitting DTIM Beacon messages over the second link.
The apparatus according to claim 24 or 25, wherein the first indication information is the value of the first TBTT; or,

the first indication information is an offset of the value of the first TBTT.
The apparatus of any one of claims 22-26, wherein a time interval between the transmission time of the first frame and a second TBTT of a second Beacon message on a second link is greater than or equal to a preset duration, the second Beacon message being a Beacon message having a TBTT after the transmission time of the first frame and closest to the transmission time of the first frame;

the first frame further includes a third remaining interval number carried in the second Beacon packet.
The apparatus of any one of claims 22-27, wherein the transmitting module is further configured to:

and if the second device is determined to cache the data to be transmitted through the second link, the second device sends a data packet on the second link at the TBTT of the DTIM Beacon.
A transmission apparatus, characterized by comprising: a transceiver, a processor, a memory;

the memory stores computer-executable instructions;

the processor executing computer-executable instructions stored in the memory, causing the processor to perform the transmission method of any one of claims 1 to 8;

Wherein the processor comprises an application specific integrated circuit ASIC.
A transmission apparatus, characterized by comprising: a transceiver, a processor, a memory;

the memory stores computer-executable instructions;

the processor executing computer-executable instructions stored in the memory, causing the processor to perform the transmission method of any one of claims 9 to 16;

wherein the processor includes an ASIC.
A computer-readable storage medium, in which computer-executable instructions are stored, which when executed by a processor are adapted to implement the transmission method of any one of claims 1 to 7 or 8 to 14.
A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the transmission method according to any one of claims 1 to 7 or 8 to 14.
A chip comprising a processing module for implementing the transmission method of any one of claims 1 to 7 or 8 to 14, and a communication interface.