WO2025077590A1 - Service transmission method and apparatus - Google Patents

Abstract

Provided in the present application are a service transmission method and apparatus. The technical solution provided in the present application can be applied to a wireless local area network system that supports IEEE 802.11be next-generation Wi-Fi protocols (such as Wi-Fi 8, UHR and 11bn), or Wi-Fi AI, or millimeter waves (mmWave), or ultra-wideband (UWB), or sensing. The service transmission method comprises: a sending station using a first channel to transmit at least one first PPDU with a receiving station; the sending station receiving a preemption signal from a preemption station during the process of transmitting the at least one first PPDU, wherein the preemption signal indicates that the preemption station makes a request to perform service transmission; and the sending station using part of the first channel to continue to perform service transmission, and reserving part of the channel for the preemption station to perform preemption transmission. By means of the method of the present application, the influence on a service that is currently being transmitted by a sending station can be reduced.

Description

Business transmission method and device

This application claims priority to Russian patent application No. 2023125825 filed with the Russian State Intellectual Property Office on October 10, 2023, entitled “Method and Device for Business Transmission”, the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of communication technology, and more specifically, to a service transmission method and device.

Background Art

Low latency is an important research goal for current business transmission. In particular, real-time applications (RAT) have stricter requirements for low latency transmission, and even require ultra-low latency of less than a few milliseconds and ultra-high reliability (UHR). In order to ensure low latency transmission of RAT, preemption technology is currently introduced.

The preemptive technology is specifically: when the sending station is transmitting non-low-latency service data packets, other stations have service data packets with ultra-low latency requirements that need to be transmitted, then the sending station interrupts the transmission of the current PPDU and allows other stations to occupy the channel to transmit service data packets with ultra-low latency requirements, or, after the sending station completes the transmission of the current PPDU, it interrupts the transmission of non-low-latency service data packets and allows other stations to occupy the channel to transmit service data packets with ultra-low latency requirements. Therefore, other stations preempting the sending station will cause the transmission of the sending station to be interrupted, which will have a certain impact on the original transmission.

Summary of the invention

The present application provides a service transmission method and device, which can reduce the impact on the original transmission of the sending site.

In the first aspect, a service transmission method is provided, which can be executed by a first site, or by a module (such as a chip or circuit) in the first site, or by a logical node, logical module or software that can implement all or part of the functions of the first site, and the present application does not limit this.

The method includes: the first station uses a first channel to transmit at least one first PPDU with a third station; the first station receives first information, and the first information is used to indicate that the second station requests service transmission; the first station uses a second channel to transmit at least one second PPDU with the third station, and the second channel is part of the first channel.

Specifically, the above-mentioned “the second channel is a part of the first channel” can be understood as the above-mentioned second channel is a partial channel of the above-mentioned first channel, or, the bandwidth of the above-mentioned second channel is a part of the bandwidth of the above-mentioned first channel, or, the frequency domain resources corresponding to the above-mentioned second channel are a part of the frequency domain resources corresponding to the above-mentioned first channel, or, the frequency domain range corresponding to the above-mentioned second channel is included in the frequency domain range corresponding to the above-mentioned first channel, or, the above-mentioned second channel is a subchannel of the above-mentioned first channel, etc.

Specifically, the at least one second PPDU may be a PPDU belonging to the same service as the at least one first PPDU, and the at least one second PPDU may also be a PPDU of a new service, which is not limited in the present application.

Specifically, the above-mentioned first information may be a preemptive signal.

When the service transmission of the sending station is preempted, the impact on the original transmission can be reduced by reducing the transmission channel of the original service to maintain the continued transmission of the original service.

Specifically, the at least one first PPDU includes first indication information, where the first indication information is used to indicate at least one of the following information:

The sending period of the at least one first PPDU, the length of the at least one first PPDU, the period of sending or receiving the first information, and the time interval of sending or receiving the first information.

The above time interval can also be understood as a time window.

In combination with the first aspect, in certain implementations of the first aspect, when the number of the at least one first PPDU and the number of the at least one second PPDU are 1, there is a first time interval between a first PPDU and a second PPDU, and the first site receiving the first information includes: the first site receives the first information at the first time interval.

The above-mentioned first time interval can be a preemption opportunity (PROP).

The sending station (i.e., the first station) receives the preemptive signal using the time interval between the PPDUs sent, and the preemptive station (i.e., the second station) sends the preemptive signal using the time interval between the PPDUs sent by the sending station, so that the sending station can detect the preemptive signal. Signal first.

In combination with the first aspect, in certain implementations of the first aspect, when the number of the at least one first PPDU or the at least one second PPDU is greater than 1, there is a first time interval between the last first PPDU of the at least one first PPDU and the first second PPDU of the at least one second PPDU, and the first site receiving the first information includes: the first site receives the first information at the first time interval.

There is a time interval #1 between any two adjacent first PPDUs in the at least one first PPDU mentioned above, so there are multiple time intervals #1 between at least one first PPDU, and the multiple time intervals #1 are PROPs, and the first time interval mentioned above can be one of the PROPs.

The sending period of the at least one first PPDU mentioned above can be considered as a preemption period (PP), and the PP can also be understood as the period of PROP.

The sending site (i.e., the first site mentioned above) receives the preemptive signal using the time interval between the PPDUs sent, and the preemptive site (i.e., the second site mentioned above) sends the preemptive signal using the time interval between the PPDUs sent by the sending site, so that the sending site can detect the preemptive signal.

In combination with the first aspect, in certain implementations of the first aspect, the first time interval also includes a second time and a third time, the second time (aTxRxTurnaroundTime) is used for the first site to switch from a sending state to a receiving state, the third time (aRxTxTurnaroundTime) is used for the first site to switch from a receiving state to a sending state, and the first site receiving the first information includes: the first site receives the first information at a time interval in the first time interval except the second time and the third time.

Optionally, the at least one first PPDU may further include a time interval in the first time interval except the second time and the third time.

The sending site (i.e., the first site) uses the time interval in the first time interval excluding the delay for the conversion between the sending state and the receiving state to receive the preemptive signal, and the preemptive site (i.e., the second site) uses the time interval in the first time interval excluding the delay for the conversion between the sending state and the receiving state of the sending site to send the preemptive signal. This can not only increase the success rate of the sending site detecting the preemptive signal, but also reduce the resource overhead of the preemptive site.

In combination with the first aspect, in certain implementations of the first aspect, the first site receiving the first information includes: the first site receiving the first information on a fourth channel, which is a part of the first channel; the method also includes: the first site determining that the channel in the first channel other than the fourth channel is the second channel.

Specifically, the first site may determine that part or all of the first channels except the fourth channel are the second channels.

Specifically, the first station receiving the first information on the fourth channel indicates that the second station wants to occupy the fourth channel for preemptive transmission. The fourth channel here may be the same as, partially the same as, or completely different from the third channel requested by the second station.

The sending station (i.e., the first station) can learn the channel on which the preemptive station (i.e., the second station) wants to preempt transmission by receiving the channel of the preemptive signal, and reserve a channel for the preemptive transmission and re-determine the channel of the original transmission, thereby ensuring that the preemptive transmission is carried out and the original transmission is not interrupted.

In combination with the first aspect, in certain implementations of the first aspect, the fourth channel is in the high frequency band of the first channel, or the fourth channel is in the low frequency band of the first channel, or the bandwidth of the fourth channel is less than or equal to half of the bandwidth of the first channel.

By imposing certain restrictions on the fourth channel sent by the first station (ie, the second station), it is avoided that the fourth channel used by the first station to send the first information is occupied too much, resulting in the interruption of the original transmission.

In combination with the first aspect, in certain implementations of the first aspect, when the main channel of the first site is the same as the main channel of the second site, the first site receiving the first information includes: the first site receives the first information on the main channel; the method also includes: the first site sends second information, the second information is used to indicate switching the main channel of the first site, and the second channel includes the main channel of the first site after switching.

Furthermore, the second information is also used to indicate the primary channel of the first site after the switch.

When the main channels of the sending site (i.e., the first site) and the preemptive site (i.e., the second site) are the same, the sending site will switch its main channel after receiving the preemptive signal, and the original transmission of the sending site will also be switched to the main channel after the sending site switches, ensuring that the original transmission of the sending site is not interrupted.

Specifically, the second information may be carried in any wireless frame of the sending station for transmission, and this application does not limit this. Exemplarily, the second information may be carried in at least one second PPDU for transmission, and more specifically, the second information may be carried in The at least one second PPDU is sent in the first second PPDU.

In combination with the first aspect, in some implementations of the first aspect, the at least one second PPDU may further include second indication information, where the second indication information is used to indicate the second channel.

Exemplarily, the second indication information may be carried in the first second PPDU sent among the at least one second PPDU.

After determining the second channel, the sending station (ie, the first station) needs to notify the receiving station (ie, the third station) of the second channel so that the receiving station knows how to receive data.

In combination with the first aspect, in some implementations of the first aspect, the first information is further used to indicate that the second station requests to use a third channel, where the third channel is a part of the first channel.

Specifically, the above-mentioned “the third channel is part of the first channel” can be understood as the above-mentioned third channel is a partial channel of the above-mentioned first channel, or, the bandwidth of the above-mentioned third channel is part of the bandwidth of the above-mentioned first channel, or, the frequency domain resources corresponding to the above-mentioned third channel are part of the frequency domain resources corresponding to the above-mentioned first channel, or, the frequency domain range corresponding to the above-mentioned third channel is included in the frequency domain range corresponding to the above-mentioned first channel, or, the above-mentioned third channel is a subchannel of the above-mentioned first channel, etc.

Specifically, the third channel requested to be used by the second station can be determined in the following three ways:

Mode 1: The third channel is predefined based on the first channel.

Mode 2: The at least one first PPDU includes third indication information, where the third indication information is used to indicate a third channel, and the third channel is used for the second site to transmit at least one third PPDU.

Exemplarily, the third indication information may be carried in part or all of the at least one first PPDU. For example, the third indication information may be carried in the first PPDU sent among the at least one first PPDU.

Method 3: The first station and the second station determine the third channel through negotiation, and the specific steps are as follows:

The first station sends fourth information to the second station, where the fourth information is used to indicate configuration information of the third channel.

Specifically, the configuration information of the third channel includes information such as the bandwidth position and bandwidth size of the third channel.

Optionally, the first site receives third information from the second site, where the third information is used to request configuration information of the third channel.

The negotiation process of the above-mentioned method three only needs to be completed before the second site needs to transmit the above-mentioned at least one third PPDU, and the specific negotiation time is not limited in this application.

The above three methods can enable the second station to learn the third channel, thereby ensuring normal preemptive transmission.

On the second aspect, a service transmission method is provided, which can be executed by the first site, or by a module (such as a chip or circuit) in the first site, or by a logical node, logical module or software that can implement all or part of the functions of the first site, and the present application does not limit this.

The method includes: the first station uses a first channel to transmit at least one first PPDU to a third station based on a first parameter, and the first parameter includes a power for transmitting the at least one first PPDU or a modulation and coding scheme (MCS) for transmitting the at least one first PPDU; the first station receives first information, and the first information is used to indicate that the second station requests to transmit a service; the first station uses the first channel to transmit at least one second PPDU to the third station based on a second parameter, and the first parameter includes a power for transmitting the at least one second PPDU or a MCS for transmitting the at least one second PPDU.

The power represented by the second parameter is lower than the power represented by the first parameter, or the MCS represented by the second parameter is lower than the MCS represented by the first parameter.

Specifically, the MCS includes a coding rate and/or a modulation order. The MCS represented by the second parameter is lower than the MCS represented by the first parameter, which includes: the coding rate represented by the second parameter is lower than the coding rate represented by the first parameter and/or the modulation order represented by the second parameter is lower than the modulation order represented by the first parameter.

Specifically, the at least one second PPDU may be a PPDU belonging to the same service as the at least one first PPDU, and the at least one second PPDU may also be a PPDU of a new service, which is not limited in the present application.

Specifically, the above-mentioned first information may be a preemptive signal.

Optionally, the first information is also used to indicate that the second site requests to use the first channel.

When the service transmission of the sending station is preempted, the transmission parameters of the original service can be reduced to maintain the transmission of the original service, thereby reducing the impact on the original transmission.

Specifically, the at least one first PPDU includes first indication information, where the first indication information is used to indicate at least one of the following information:

The transmission period of the at least one first PPDU, the length of the at least one first PPDU, the transmission or reception of the first information The period, time interval for sending or receiving the above-mentioned first information.

The above time interval can also be understood as a time window.

In combination with the second aspect, in certain implementations of the second aspect, when the number of the at least one first PPDU and the number of the at least one second PPDU are 1, there is a first time interval between a first PPDU and a second PPDU, and the first site receiving the first information includes: the first site receives the first information at the first time interval.

The first time interval mentioned above may be PROP.

The sending site (i.e., the first site mentioned above) receives the preemptive signal using the time interval between the PPDUs sent, and the preemptive site (i.e., the second site mentioned above) sends the preemptive signal using the time interval between the PPDUs sent by the sending site, so that the sending site can detect the preemptive signal.

In combination with the second aspect, in certain implementations of the second aspect, when the number of the at least one first PPDU or the at least one second PPDU is greater than 1, there is a first time interval between the last first PPDU of the at least one first PPDU and the first second PPDU of the at least one second PPDU, and the first site receiving the first information includes: the first site receives the first information at the first time interval.

There is a time interval #1 between any two adjacent first PPDUs in the at least one first PPDU mentioned above, so there are multiple time intervals #1 between at least one first PPDU, and the multiple time intervals #1 are PROPs, and the first time interval mentioned above can be one of the PROPs.

The transmission period of the at least one first PPDU mentioned above may be considered as PP, and the PP may also be understood as the period of PROP.

The sending site (i.e., the first site mentioned above) receives the preemptive signal using the time interval between the PPDUs sent, and the preemptive site (i.e., the second site mentioned above) sends the preemptive signal using the time interval between the PPDUs sent by the sending site, so that the sending site can detect the preemptive signal.

In combination with the second aspect, in certain implementations of the second aspect, the first time interval also includes a second time and a third time, the second time (aTxRxTurnaroundTime) is used for the first site to switch from a sending state to a receiving state, the third time (aRxTxTurnaroundTime) is used for the first site to switch from a receiving state to a sending state, and the first site receiving the first information includes: the first site receives the first information at a time interval in the first time interval other than the second time and the third time.

Optionally, the at least one first PPDU may further include a time interval in the first time interval except the second time and the third time.

The sending site (i.e., the first site) uses the time interval in the first time interval excluding the delay for the conversion between the sending state and the receiving state to receive the preemptive signal, and the preemptive site (i.e., the second site) uses the time interval in the first time interval excluding the delay for the conversion between the sending state and the receiving state of the sending site to send the preemptive signal. This can not only increase the success rate of the sending site detecting the preemptive signal, but also reduce the resource overhead of the preemptive site.

On the third aspect, a service transmission method is provided, which can be executed by the second site, or by a module (such as a chip or circuit) in the second site, or by a logical node, logical module or software that can implement all or part of the functions of the second site, and the present application does not limit this.

The method includes: the second site sends first information to the first site, and the first information is used to indicate that the second site requests service transmission; the second site uses a third channel to transmit at least one third PPDU, and the third channel is part of the first channel, and the first channel is used for the above-mentioned first site and the third site to transmit at least one first PPDU.

Specifically, the above-mentioned “the third channel is part of the first channel” can be understood as the above-mentioned third channel is a partial channel of the above-mentioned first channel, or, the bandwidth of the above-mentioned third channel is part of the bandwidth of the above-mentioned first channel, or, the frequency domain resources corresponding to the above-mentioned third channel are part of the frequency domain resources corresponding to the above-mentioned first channel, or, the frequency domain range corresponding to the above-mentioned third channel is included in the frequency domain range corresponding to the above-mentioned first channel, or, the above-mentioned third channel is a subchannel of the above-mentioned first channel, etc.

Specifically, the above-mentioned first information may be a preemptive signal.

The preemptive station (ie, the second station) uses part of the channels of the sending station (ie, the first station) for preemptive transmission, which can maintain the continued transmission of the original service of the sending station and reduce the impact on the original transmission.

Specifically, the at least one first PPDU includes first indication information, where the first indication information is used to indicate at least one of the following information:

The sending period of the at least one first PPDU, the length of the at least one first PPDU, the period of sending or receiving the first information, and the time interval of sending or receiving the first information.

The above time interval can also be understood as a time window.

In conjunction with the third aspect, in some implementations of the third aspect, the second site sending the first information to the first site includes: The first station sends the first information at a first time interval.

Among them, when the number of the at least one first PPDU and the number of the at least one second PPDU are 1, the first time interval is the time interval between a first PPDU and a second PPDU, the second PPDU is a PPDU transmitted by the first site and the third site on the second channel, and the second channel is a part of the first channel.

Specifically, the above-mentioned “the second channel is a part of the first channel” can be understood as the above-mentioned second channel is a partial channel of the above-mentioned first channel, or, the bandwidth of the above-mentioned second channel is a part of the bandwidth of the above-mentioned first channel, or, the frequency domain resources corresponding to the above-mentioned second channel are a part of the frequency domain resources corresponding to the above-mentioned first channel, or, the frequency domain range corresponding to the above-mentioned second channel is included in the frequency domain range corresponding to the above-mentioned first channel, or, the above-mentioned second channel is a subchannel of the above-mentioned first channel, etc.

Specifically, the at least one second PPDU may be a PPDU belonging to the same service as the at least one first PPDU, and the at least one second PPDU may also be a PPDU of a new service, which is not limited in the present application.

The above-mentioned first time interval can be a preemption opportunity (PROP).

The sending site (i.e., the first site mentioned above) receives the preemptive signal using the time interval between the PPDUs sent, and the preemptive site (i.e., the second site mentioned above) sends the preemptive signal using the time interval between the PPDUs sent by the sending site, so that the sending site can detect the preemptive signal.

In combination with the third aspect, in some implementations of the third aspect, the second station sending the first information to the first station includes: the second station sending the first information at a first time interval.

In which, when the number of the at least one first PPDU or the at least one second PPDU is greater than 1, the first time interval is the time interval between the last first PPDU of the at least one first PPDU and the first second PPDU of the at least one second PPDU, and the at least one second PPDU is a PPDU transmitted by the first site and the third site on the second channel, and the second channel is a part of the first channel.

There is a time interval #1 between any two adjacent first PPDUs in the at least one first PPDU mentioned above, so there are multiple time intervals #1 between at least one first PPDU, and the multiple time intervals #1 are PROPs, and the first time interval mentioned above can be one of the PROPs.

The transmission period of the at least one first PPDU mentioned above may be considered as PP, and the PP may also be understood as the period of PROP.

The sending site (i.e., the first site mentioned above) receives the preemptive signal using the time interval between the PPDUs sent, and the preemptive site (i.e., the second site mentioned above) sends the preemptive signal using the time interval between the PPDUs sent by the sending site, so that the sending site can detect the preemptive signal.

In combination with the third aspect, in certain implementations of the third aspect, the second station sending the first information at the first time interval includes: the second station sending the first information at a time interval other than the second time and the third time in the first time interval, the second time (aTxRxTurnaroundTime) is used for the first station to switch from a sending state to a receiving state, and the third time (aRxTxTurnaroundTime) is used for the first station to switch from a receiving state to a sending state.

Optionally, the at least one first PPDU may further include a time interval in the first time interval except the second time and the third time.

The sending site (i.e., the first site) uses the time interval in the first time interval excluding the delay for the conversion between the sending state and the receiving state to receive the preemptive signal, and the preemptive site (i.e., the second site) uses the time interval in the first time interval excluding the delay for the conversion between the sending state and the receiving state of the sending site to send the preemptive signal. This can not only increase the success rate of the sending site detecting the preemptive signal, but also reduce the resource overhead of the preemptive site.

In combination with the third aspect, in some implementations of the third aspect, the second station sending the first information to the first station includes: the second station sending the first information to the first station on a fourth channel.

Specifically, the second station sends the first information to the first station on the fourth channel to indicate that the second station wants to occupy the fourth channel for preemptive transmission. The fourth channel here may be the same as, partially the same as, or completely different from the third channel requested by the second station.

The preemptive station (ie, the second station) can indicate the channel on which it wants to preempt transmission through a channel carrying a preemptive signal, which can ensure that the preemptive transmission is carried out and that the original transmission is not interrupted.

In combination with the third aspect, in certain implementations of the third aspect, the fourth channel is in the high frequency band of the first channel, or the fourth channel is in the low frequency band of the first channel, or the bandwidth of the fourth channel is less than or equal to half of the bandwidth of the first channel.

By imposing certain restrictions on the fourth channel sent by the first station (ie, the second station), it is avoided that the fourth channel used by the first station to send the first information is occupied too much, resulting in the interruption of the original transmission.

In combination with the third aspect, in certain implementations of the third aspect, when the main channel of the first site is the same as the main channel of the second site, the second site sending the first information to the first site includes: the second site sending the first information to the first site on the main channel; the method also includes: the second site receives second information from the first site, the second information is used to indicate switching the main channel of the first site, and the second channel includes the main channel of the first site after switching.

Furthermore, the second information is also used to indicate the primary channel of the first site after the switch.

When the main channels of the sending site (i.e., the first site) and the preemptive site (i.e., the second site) are the same, the sending site will switch its main channel after receiving the preemptive signal, and the original transmission of the sending site will also be switched to the main channel after the sending site switches, ensuring that the original transmission of the sending site is not interrupted.

Specifically, the second information can be carried in any wireless frame of the sending site for transmission, and this application does not limit this. Exemplarily, the second information can be carried in the at least one second PPDU for transmission, and more specifically, the second information can be carried in the first second PPDU sent in the at least one second PPDU for transmission.

In combination with the third aspect, in certain implementations of the third aspect, the at least one second PPDU may further include second indication information, where the second indication information is used to indicate the second channel.

Exemplarily, the second indication information may be carried in the first second PPDU sent among the at least one second PPDU.

Specifically, the third channel requested to be used by the second station can be determined in the following three ways:

Method 1: The second station determines the third channel according to the first channel.

Specifically, the third channel is predefined according to the first channel.

Mode 2: The at least one first PPDU includes third indication information, and the third indication information is used to indicate a third channel.

Exemplarily, the third indication information may be carried in part or all of the at least one first PPDU. For example, the third indication information may be carried in the first PPDU sent among the at least one first PPDU.

Method 3: The first station and the second station determine the third channel through negotiation, and the specific steps are as follows:

The second site receives fourth information from the first site, where the fourth information is used to indicate configuration information of the third channel.

Specifically, the configuration information of the third channel includes information such as the bandwidth position and bandwidth size of the third channel.

Optionally, the second site sends third information to the first site, where the third information is used to request configuration information of the third channel.

The negotiation process of the above-mentioned method three only needs to be completed before the second site needs to transmit the above-mentioned at least one third PPDU, and the specific negotiation time is not limited in this application.

The above three methods can enable the second station to learn the third channel, thereby ensuring normal preemptive transmission.

In a fourth aspect, a service transmission method is provided, which can be executed by the second site, or by a module (such as a chip or circuit) in the second site, or by a logical node, logical module or software that can implement all or part of the functions of the second site. The present application does not limit this.

The method includes: the second station sends first information to the first station, and the first information is used to indicate that the second station requests to transmit a service; the second station uses the above-mentioned first channel to transmit at least one third PPDU based on a third parameter, and the third parameter includes a first power for transmitting at least one third PPDU or a first MCS for transmitting at least one third PPDU.

Specifically, the first MCS includes a first coding rate and/or a first modulation order.

Specifically, the above-mentioned first information may be a preemptive signal.

Optionally, the first information is also used to indicate that the second site requests to use the first channel.

When the preemptive station needs to transmit the preemptive service, by using the specified service transmission parameters, it can not only ensure the transmission of the preemptive service, but also maintain the continued transmission of the original service, which can reduce the impact on the original transmission.

Specifically, the at least one first PPDU includes first indication information, where the first indication information is used to indicate at least one of the following information:

The sending period of the at least one first PPDU, the length of the at least one first PPDU, the period of sending or receiving the first information, and the time interval of sending or receiving the first information.

The above time interval can also be understood as a time window.

In combination with the fourth aspect, in some implementations of the fourth aspect, the second site sending the first information to the first site includes: the first site sending the first information at a first time interval.

Wherein, when the number of the at least one first PPDU and the number of the at least one second PPDU are 1, the first time interval is the time interval between a first PPDU and a second PPDU, and the second PPDU is the time interval between the first station and the third station in The PPDU transmitted on the above first channel.

Specifically, the at least one second PPDU may be a PPDU belonging to the same service as the at least one first PPDU, and the at least one second PPDU may also be a PPDU of a new service, which is not limited in the present application.

The first time interval mentioned above may be PROP.

The sending site (i.e., the first site mentioned above) receives the preemptive signal using the time interval between the PPDUs sent, and the preemptive site (i.e., the second site mentioned above) sends the preemptive signal using the time interval between the PPDUs sent by the sending site, so that the sending site can detect the preemptive signal.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the second station sending the first information to the first station includes: the second station sending the first information at a first time interval.

In which, when the number of the at least one first PPDU or the at least one second PPDU is greater than 1, the first time interval is the time interval between the last first PPDU of the at least one first PPDU and the first second PPDU of the at least one second PPDU, and the at least one second PPDU is the PPDU transmitted by the first site and the third site on the first channel.

There is a time interval #1 between any two adjacent first PPDUs in the at least one first PPDU mentioned above, so there are multiple time intervals #1 between at least one first PPDU, and the multiple time intervals #1 are PROPs, and the first time interval mentioned above can be one of the PROPs.

The transmission period of the at least one first PPDU mentioned above may be considered as PP, and the PP may also be understood as the period of PROP.

The sending site (i.e., the first site mentioned above) receives the preemptive signal using the time interval between the PPDUs sent, and the preemptive site (i.e., the second site mentioned above) sends the preemptive signal using the time interval between the PPDUs sent by the sending site, so that the sending site can detect the preemptive signal.

In combination with the fourth aspect, in certain implementations of the fourth aspect, the second station sending the first information at the first time interval includes: the second station sending the first information at a time interval other than the second time and the third time in the first time interval, the second time (aTxRxTurnaroundTime) is used for the first station to switch from a sending state to a receiving state, and the third time (aRxTxTurnaroundTime) is used for the first station to switch from a receiving state to a sending state.

Optionally, the at least one first PPDU may further include a time interval in the first time interval except the second time and the third time.

The sending site (i.e., the first site) uses the time interval in the first time interval excluding the delay for the conversion between the sending state and the receiving state to receive the preemptive signal, and the preemptive site (i.e., the second site) uses the time interval in the first time interval excluding the delay for the conversion between the sending state and the receiving state of the sending site to send the preemptive signal. This can not only increase the success rate of the sending site detecting the preemptive signal, but also reduce the resource overhead of the preemptive site.

In a fifth aspect, a service transmission device is provided, which includes: a transceiver unit for transmitting at least one first PPDU with a third site using a first channel; the transceiver unit is also used to receive first information, which is used to indicate that the second site requests service transmission; the transceiver unit is also used to transmit at least one second PPDU with the above-mentioned third site using a second channel, and the second channel is part of the above-mentioned first channel.

Specifically, the at least one first PPDU includes first indication information, where the first indication information is used to indicate at least one of the following information:

The sending period of the at least one first PPDU, the length of the at least one first PPDU, the period of sending or receiving the first information, and the time interval of sending or receiving the first information.

In combination with the fifth aspect, in certain implementations of the fifth aspect, when the number of the at least one first PPDU and the number of the at least one second PPDU are 1, there is a first time interval between a first PPDU and a second PPDU, and the transceiver unit is used to receive the first information, including: the transceiver unit is used to receive the first information in the first time interval.

In combination with the fifth aspect, in certain implementations of the fifth aspect, when the number of the at least one first PPDU or the at least one second PPDU is greater than 1, there is a first time interval between the last first PPDU of the at least one first PPDU and the first second PPDU of the at least one second PPDU, and the transceiver unit is used to receive the first information, including: the transceiver unit is used to receive the first information in the first time interval.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the above-mentioned first time interval also includes a second time and a third time, the second time (aTxRxTurnaroundTime) is used for the above-mentioned device to switch from a sending state to a receiving state, and the third time (aRxTxTurnaroundTime) is used for the above-mentioned device to switch from a receiving state to a sending state, and the above-mentioned transceiver unit is used to receive the first information, including: the above-mentioned transceiver unit is used to receive the first information in a time interval other than the above-mentioned second time and the above-mentioned third time in the first time interval.

In conjunction with the fifth aspect, in some implementations of the fifth aspect, the transceiver unit is used to receive the first information, including: The unit is used to receive the above-mentioned first information on a fourth channel, and the fourth channel is a part of the above-mentioned first channel; the above-mentioned device also includes: a processing unit, which is used to determine that the channel other than the above-mentioned fourth channel in the above-mentioned first channel is the above-mentioned second channel.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the fourth channel is in the high frequency band of the first channel, or the fourth channel is in the low frequency band of the first channel, or the bandwidth of the fourth channel is less than or equal to half of the bandwidth of the first channel.

In combination with the fifth aspect, in certain implementations of the fifth aspect, when the main channel of the above-mentioned device is the same as the main channel of the above-mentioned second site, the above-mentioned transceiver unit is used to receive the first information, including: the above-mentioned transceiver unit is used to receive the first information on the main channel; the above-mentioned transceiver unit is also used to send second information, and the second information is used to indicate switching the main channel of the above-mentioned device, and the second channel includes the main channel of the above-mentioned device after switching.

Furthermore, the second information is also used to indicate a primary channel of the device after switching.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the at least one second PPDU may further include second indication information, where the second indication information is used to indicate the second channel.

In combination with the fifth aspect, in certain implementations of the fifth aspect, the first information is further used to indicate that the second station requests to use a third channel, which is a part of the first channel.

Specifically, the third channel requested to be used by the second station can be determined in the following three ways:

Mode 1: The third channel is predefined based on the first channel.

Mode 2: The at least one first PPDU includes third indication information, where the third indication information is used to indicate a third channel, and the third channel is used for the second site to transmit at least one third PPDU.

Exemplarily, the third indication information may be carried in part or all of the at least one first PPDU. For example, the third indication information may be carried in the first PPDU sent among the at least one first PPDU.

Mode 3: The device and the second station determine the third channel through negotiation, and the specific steps are as follows:

The transceiver unit is used to send fourth information to the second site, where the fourth information is used to indicate configuration information of the third channel.

Specifically, the configuration information of the third channel includes information such as the bandwidth position and bandwidth size of the third channel.

Optionally, the transceiver unit is used to receive third information from the second site, where the third information is used to request configuration information of the third channel.

The explanation and beneficial effects of the relevant contents of the service transmission device provided in the fifth aspect can refer to the service transmission method shown in the first aspect, and will not be repeated here.

In a sixth aspect, a service transmission device is provided, the device comprising: a transceiver unit, used to transmit at least one first PPDU to a third site using a first channel based on a first parameter, the first parameter including a power for transmitting at least one first PPDU or a modulation and coding scheme (MCS) for transmitting at least one first PPDU; the transceiver unit is also used to receive first information, the first information being used to indicate that a second site requests service transmission; the transceiver unit is also used to transmit at least one second PPDU to the third site using the first channel based on a second parameter, the first parameter including a power for transmitting at least one second PPDU or a MCS for transmitting at least one second PPDU.

The power represented by the second parameter is lower than the power represented by the first parameter, or the MCS represented by the second parameter is lower than the MCS represented by the first parameter.

Specifically, the MCS includes a coding rate and/or a modulation order. The MCS represented by the second parameter is lower than the MCS represented by the first parameter, which includes: the coding rate represented by the second parameter is lower than the coding rate represented by the first parameter and/or the modulation order represented by the second parameter is lower than the modulation order represented by the first parameter.

Specifically, the at least one first PPDU includes first indication information, where the first indication information is used to indicate at least one of the following information:

The sending period of the at least one first PPDU, the length of the at least one first PPDU, the period of sending or receiving the first information, and the time interval of sending or receiving the first information.

In combination with the sixth aspect, in certain implementations of the sixth aspect, when the number of the at least one first PPDU and the number of the at least one second PPDU are 1, there is a first time interval between a first PPDU and a second PPDU, and the transceiver unit is used to receive the first information, including: the transceiver unit is used to receive the first information in the first time interval.

In combination with the sixth aspect, in certain implementations of the sixth aspect, when the number of the at least one first PPDU or the at least one second PPDU is greater than 1, there is a first time interval between the last first PPDU of the at least one first PPDU and the first second PPDU of the at least one second PPDU, and the transceiver unit is used to receive the first information, including: the transceiver unit is used to receive the first information in the first time interval.

In combination with the sixth aspect, in certain implementations of the sixth aspect, the above-mentioned first time interval also includes a second time and a third time, the second time (aTxRxTurnaroundTime) is used for the first site to switch from a sending state to a receiving state, and the third time (aRxTxTurnaroundTime) is used for the first site to switch from a receiving state to a sending state, and the above-mentioned transceiver unit is used to receive the first information, including: the above-mentioned transceiver unit is used to receive the first information in a time interval other than the above-mentioned second time and the above-mentioned third time in the first time interval.

The explanation and beneficial effects of the relevant contents of the service transmission device provided in the sixth aspect can be referred to the service transmission method shown in the second aspect, and will not be repeated here.

In the seventh aspect, a service transmission device is provided, which includes: a transceiver unit for sending first information to a first site, the first information being used to indicate that the device requests service transmission; the transceiver unit is also used to transmit at least one third PPDU using a third channel, the third channel being part of the first channel, and the first channel being used to transmit at least one first PPDU between the above-mentioned first site and the third site.

Specifically, the at least one first PPDU includes first indication information, where the first indication information is used to indicate at least one of the following information:

The sending period of the at least one first PPDU, the length of the at least one first PPDU, the period of sending or receiving the first information, and the time interval of sending or receiving the first information.

In combination with the seventh aspect, in certain implementations of the seventh aspect, the transceiver unit is used to send the first information to the first site, including: the transceiver unit is used to send the first information at a first time interval.

Among them, when the number of the at least one first PPDU and the number of the at least one second PPDU are 1, the first time interval is the time interval between a first PPDU and a second PPDU, the second PPDU is a PPDU transmitted by the first site and the third site on the second channel, and the second channel is a part of the first channel.

In combination with the seventh aspect, in certain implementations of the seventh aspect, the transceiver unit is used to send the first information to the first site, including: the transceiver unit is used to send the first information at a first time interval.

In which, when the number of the at least one first PPDU or the at least one second PPDU is greater than 1, the first time interval is the time interval between the last first PPDU of the at least one first PPDU and the first second PPDU of the at least one second PPDU, and the at least one second PPDU is a PPDU transmitted by the first site and the third site on the second channel, and the second channel is a part of the first channel.

In combination with the seventh aspect, in certain implementations of the seventh aspect, the above-mentioned transceiver unit is used to send the above-mentioned first information in the above-mentioned first time interval, including: the above-mentioned transceiver unit is used to send the above-mentioned first information in the time interval other than the second time and the third time in the above-mentioned first time interval, the second time (aTxRxTurnaroundTime) is used for the first site to switch from a sending state to a receiving state, and the third time (aRxTxTurnaroundTime) is used for the first site to switch from a receiving state to a sending state.

In combination with the seventh aspect, in certain implementations of the seventh aspect, the transceiver unit is used to send the first information to the first site, including: the transceiver unit is used to send the first information to the first site on a fourth channel.

In combination with the seventh aspect, in certain implementations of the seventh aspect, the fourth channel is in the high frequency band of the first channel, or the fourth channel is in the low frequency band of the first channel, or the bandwidth of the fourth channel is less than or equal to half of the bandwidth of the first channel.

In combination with the seventh aspect, in certain implementations of the seventh aspect, when the main channel of the above-mentioned first site is the same as the main channel of the above-mentioned device, the above-mentioned transceiver unit is used to send the first information to the first site, including: the above-mentioned transceiver unit is used to send the first information to the first site on the main channel; the above-mentioned transceiver unit is also used to receive second information from the first site, and the second information is used to indicate switching the main channel of the first site, and the second channel includes the main channel of the first site after switching.

Furthermore, the second information is also used to indicate the primary channel of the first site after the switch.

In combination with the seventh aspect, in certain implementations of the seventh aspect, the at least one second PPDU may further include second indication information, where the second indication information is used to indicate the second channel.

Specifically, the third channel requested to be used by the above device can be determined in the following three ways:

Mode 1: The above-mentioned device further includes: a processing unit, configured to determine a third channel according to the above-mentioned first channel.

Specifically, the third channel is predefined according to the first channel.

Mode 2: The at least one first PPDU includes third indication information, and the third indication information is used to indicate a third channel.

Exemplarily, the third indication information may be carried in part or all of the at least one first PPDU. For example, the third indication information may be carried in the first PPDU sent among the at least one first PPDU.

Method 3: The first station and the device determine the third channel through negotiation, and the specific steps are as follows:

The transceiver unit is used to receive fourth information from the first site, where the fourth information is used to indicate configuration information of the third channel.

Specifically, the configuration information of the third channel includes information such as the bandwidth position and bandwidth size of the third channel.

Optionally, the transceiver unit is further used to send third information to the first site, where the third information is used to request configuration information of the third channel.

The explanation and beneficial effects of the relevant contents of the service transmission device provided in the seventh aspect can be referred to the service transmission method shown in the third aspect, and will not be repeated here.

In the eighth aspect, a service transmission device is provided, which includes: a transceiver unit for sending first information to a first site, the first information being used to indicate that the device requests service transmission; the transceiver unit is also used to transmit at least one third PPDU using a first channel based on a third parameter, the first channel being used for transmitting at least one first PPDU between the above-mentioned first site and the third site, and the third parameter including a first power for transmitting at least one third PPDU or a first MCS for transmitting at least one third PPDU.

Specifically, the at least one first PPDU includes first indication information, where the first indication information is used to indicate at least one of the following information:

The sending period of the at least one first PPDU, the length of the at least one first PPDU, the period of sending or receiving the first information, and the time interval of sending or receiving the first information.

In combination with the eighth aspect, in certain implementations of the eighth aspect, the transceiver unit is used to send the first information to the first site, including: the transceiver unit is used to send the first information at a first time interval.

Among them, when the number of the at least one first PPDU and the number of the at least one second PPDU are 1, the first time interval is the time interval between a first PPDU and a second PPDU, and the second PPDU is the PPDU transmitted by the first site and the third site on the first channel.

In combination with the eighth aspect, in certain implementations of the eighth aspect, the transceiver unit is used to send the first information to the first site, including: the transceiver unit is used to send the first information at a first time interval.

In which, when the number of the at least one first PPDU or the at least one second PPDU is greater than 1, the first time interval is the time interval between the last first PPDU of the at least one first PPDU and the first second PPDU of the at least one second PPDU, and the at least one second PPDU is the PPDU transmitted by the first site and the third site on the first channel.

In combination with the eighth aspect, in certain implementations of the eighth aspect, the above-mentioned transceiver unit is used to send the above-mentioned first information in the above-mentioned first time interval, including: the above-mentioned transceiver unit is used to send the above-mentioned first information in the above-mentioned first time interval except the second time and the third time, the second time (aTxRxTurnaroundTime) is used for the first site to switch from a sending state to a receiving state, and the third time (aRxTxTurnaroundTime) is used for the first site to switch from a receiving state to a sending state.

The explanation and beneficial effects of the relevant contents of the service transmission device provided in the eighth aspect can be referred to the service transmission method shown in the fourth aspect, and will not be repeated here.

In a ninth aspect, a communication device is provided, comprising a processor, wherein the processor is used to, by executing a computer program or instruction or through a logic circuit, enable the communication device to perform the method described in the first aspect and any possibility of the first aspect; or enable the communication device to perform the method described in the second aspect and any possibility of the second aspect; enable the communication device to perform the method described in the third aspect and any possibility of the third aspect; or enable the communication device to perform the method described in the fourth aspect and any possibility of the fourth aspect.

In a possible implementation, the communication device further includes a memory for storing the computer program or instruction.

In a possible implementation manner, the communication device further includes a communication interface, which is used to input and/or output signals.

In the tenth aspect, a communication device is provided, comprising a logic circuit and an input/output interface, the input/output interface being used to input and/or output signals, the logic circuit being used to execute the method described in the first aspect and any possibility of the first aspect; or, the logic circuit being used to execute the method described in the second aspect and any possibility of the second aspect; the logic circuit being used to execute the method described in the third aspect and any possibility of the third aspect; or, the logic circuit being used to execute the method described in the fourth aspect and any possibility of the fourth aspect.

In the eleventh aspect, a computer-readable storage medium is provided, on which a computer program or instruction is stored. When the computer program or the instruction is run on a computer, the method described in the first aspect and any possibility of the first aspect is executed; or, the method described in the second aspect and any possibility of the second aspect is executed; the method described in the third aspect and any possibility of the third aspect is executed; or, the method described in the fourth aspect and any possibility of the fourth aspect is executed.

In the twelfth aspect, a computer program product is provided, comprising instructions, which, when executed on a computer, cause the method described in the first aspect and any possibility of the first aspect to be executed; or, cause the method described in the second aspect and any possibility of the second aspect to be executed; cause the method described in the third aspect and any possibility of the third aspect to be executed; or, cause the method described in the fourth aspect and any possibility of the fourth aspect to be executed.

In the thirteenth aspect, a communication system is provided, which includes the above-mentioned first site and the above-mentioned second site, the first site is used to execute the method described in the above-mentioned first aspect and any possibility of the first aspect, or the first site is used to execute the method described in the above-mentioned second aspect and any possibility of the second aspect, the second site is used to execute the method described in the above-mentioned third aspect and any possibility of the third aspect, or the second site is used to execute the method described in the above-mentioned fourth aspect and any possibility of the fourth aspect.

For the description of the beneficial effects of the fifth to thirteenth aspects, reference can be made to the description of the first to fourth aspects.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of an example network architecture 100 applicable to an embodiment of the present application.

FIG. 2 is a schematic flowchart of a service transmission method 200 applicable to an embodiment of the present application.

FIG3 is a schematic diagram of a service transmission method 200 applicable to an embodiment of the present application.

FIG. 4 is another schematic diagram of a service transmission method 200 applicable to an embodiment of the present application.

FIG. 5 is another schematic diagram of the service transmission method 200 applicable to the embodiment of the present application.

FIG. 6 is another schematic diagram of the service transmission method 200 applicable to the embodiment of the present application.

FIG. 7 is another schematic diagram of the service transmission method 200 applicable to the embodiment of the present application.

FIG. 8 is a schematic flowchart of a service transmission method 300 applicable to an embodiment of the present application.

FIG. 9 is a schematic flowchart of a service transmission method 800 applicable to an embodiment of the present application.

FIG. 10 is a schematic diagram of a service transmission method 800 applicable to an embodiment of the present application.

FIG. 11 is another schematic diagram of a service transmission method 800 applicable to an embodiment of the present application.

FIG. 12 is a schematic flowchart of a service transmission method 900 applicable to an embodiment of the present application.

FIG. 13 is a schematic block diagram of an example of a communication device 1100 applicable to an embodiment of the present application.

FIG. 14 is a schematic block diagram of an example communication device 1200 applicable to an embodiment of the present application.

FIG. 15 is a schematic block diagram of an example of a communication device 1300 applicable to an embodiment of the present application.

DETAILED DESCRIPTION

The technical solution in this application will be described below in conjunction with the accompanying drawings.

The embodiments of the present application can be applied to a wireless local area network (WLAN). The current standard adopted by WLAN is the Institute of Electrical and Electronics Engineers (IEEE) 802.11 series. A WLAN may include multiple basic service sets (BSSs), and the network nodes in the BSSs are stations (STAs) and access points (APs). Each BSS may include an AP and multiple STAs associated with the AP.

The AP in the embodiments of the present application may also be referred to as a wireless access point or hotspot, etc. AP is an access point for mobile users to enter a wired network. It is mainly deployed in homes, buildings, and parks. The typical coverage radius is tens of meters to hundreds of meters. Of course, it can also be deployed outdoors. AP is equivalent to a bridge connecting a wired network and a 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 can be a device that supports the 802.11ax standard. Further optionally, the AP can be a device that supports multiple WLAN standards such as 802.11ac, 802.11n, 802.11g, 802.11b, 802.11a or subsequent versions.

The STA in the embodiment of the present application can be a wireless communication chip, a wireless sensor or a wireless communication terminal. For example: a mobile phone that supports Wi-Fi communication function, a tablet computer that supports Wi-Fi communication function, a set-top box that supports Wi-Fi communication function, a smart TV that supports Wi-Fi communication function, a smart wearable device that supports Wi-Fi communication function, a vehicle-mounted communication device that supports Wi-Fi communication function, and a computer that supports Wi-Fi communication function. Optionally, STA can support the 802.11ax standard, and further optionally, STA can support multiple WLAN standards such as 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a or subsequent versions.

In the embodiment of the present application, the STA or AP includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer includes applications such as a browser, an address book, a word processing software, and an instant messaging software. In addition, the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application, as long as it can communicate according to the method provided in the embodiment of the present application by running a program that records the code of the method provided in the embodiment of the present application, for example, the execution subject of the method provided in the embodiment of the present application can be a STA or an AP, or a functional module in a STA or an AP that can call and execute a program.

In addition, various aspects or features of the present application can be implemented as methods, devices or products using standard programming and/or engineering techniques. The term "product" used in this application covers computer programs that can be accessed from any computer-readable device, carrier or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or tapes, etc.), optical disks (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memories (EPROMs), cards, sticks or key drives, etc.). In addition, the various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.

FIG1 is a schematic diagram of a network architecture 100 of a wireless local area network applicable to an embodiment of the present application. The network architecture 100 includes access points AP110 and AP120. Optionally, the network architecture 100 may also include stations STA111, STA112, STA113 associated with access point AP110 and stations STA121, STA122, STA123 associated with access point AP120. Among them, access point AP110, stations STA111, STA112, STA113 constitute basic service set 1 (basic service set, BSS1), and access points AP120, STA121, STA122, STA123 constitute BSS2. In an example, AP110 and AP120 can cooperate in transmission to provide uplink or downlink transmission services for the same or different users. It should be understood that Figure 1 is only exemplary and should not limit the network architecture of the wireless local area network to which the present application is applicable. For example, the network architecture may also include more APs, and each AP may be associated with more STAs. The embodiments of the present application are not limited here.

The AP in the above network architecture 100 can be considered as an AP-type station, and the STA in the above network architecture 100 can be considered as a non-access point-type station (none access point station, non-AP STA).

Low latency is an important research goal for current business transmission. In particular, real-time applications (RAT) have stricter requirements for low latency transmission, and even require ultra-low latency of less than a few milliseconds and ultra-high reliability (UHR). In order to ensure low latency transmission of RAT, preemption technology is currently introduced.

Specifically, the above-mentioned preemptive technology can be divided into preemption at the physical layer protocol data unit (PPDU) level and preemption at the transmission opportunity (TXOP) level.

Among them, the PPDU level preemption is specifically: when the sending site is transmitting non-low-latency service data packets, if other sites have transmission requirements for ultra-low-latency service data packets, the sending site interrupts the current PPDU transmission and allows other sites to transmit ultra-low-latency service data packets; after the transmission of the ultra-low-latency service data packets is completed, the transmission of the non-low-latency service data packets will continue.

Among them, the TXOP level preemption specifically means that when the sending station is transmitting non-low-latency service data packets within a TXOP, if other stations have transmission requirements for ultra-low-latency service data packets, the sending station can complete the transmission of the current PPDU within the TXOP and allow other stations to transmit ultra-low-latency service data packets in the same TXOP.

Regardless of the above-mentioned preemption, when the sending station is transmitting services, other stations preempting the sending station will cause the transmission of the sending station to be interrupted, which will have a certain impact on the original transmission of the sending station. The embodiment of the present application provides a service transmission method 200, which can reduce the impact of other stations' preemption on the original transmission of the sending station.

In the service transmission method 200 shown in Figure 2, the sending site reduces the original transmission channel after detecting the preemptive signal of other sites, and reserves a part of the channel for the preemptive transmission of other sites, which can ensure both the original transmission of the sending site and the preemptive transmission of other sites.

Exemplarily, the first station (i.e., the sending station) in the following service transmission method 200 may be the AP 110 in the BSS1 of the above-mentioned network architecture 100, and the second station (i.e., the other station) may be the AP 120 in the BSS2 of the above-mentioned network architecture 100; or, the first station may be the AP 110 in the BSS1 of the above-mentioned network architecture 100, and the second station may be the STA 121 in the BSS2 of the above-mentioned network architecture 100; or, the first station may be the STA 111 in the BSS1 of the above-mentioned network architecture 100, and the second station may be the STA 121 in the BSS2 of the above-mentioned network architecture 100; or, the first station may be the STA 111 in the BSS1 of the above-mentioned network architecture 100, and the second station may be the STA 112 in the BSS1 of the above-mentioned network architecture 100, etc., and the present application does not limit the specific forms of the first station and the second station. It can be seen that the first station and the second station may belong to the same BSS or to different BSSs.

Specifically, when the first site and the second site belong to the same BSS, before receiving the preemptive signal, the first site may perform the original transmission on the main channel and the secondary channel of the BSS to which the first site and the second site belong; after the first site receives the preemptive signal, the first site may reserve the secondary channel of the BSS to which the first site and the second site belong for the second site to use for preemptive transmission.

When the first site and the second site belong to different BSSs respectively, before receiving the preemptive signal, the first site may perform original transmission on the main channel and secondary channel of the BSS to which the first site belongs and the main channel and secondary channel of the BSS to which the second site belongs; after the first site receives the first information, the first site will at least reserve the main channel of the BSS to which the second site belongs for the second site to use for preemptive transmission.

FIG2 is a schematic flow chart of a service transmission method 200 according to an embodiment of the present application. The site is used as the execution subject of the interactive illustration to illustrate the method, but the present application does not limit the execution subject of the interactive illustration. Exemplarily, the first site and the second site in FIG. 2 may also be chips, chip systems or processors that support the implementation of the method, or may be logical nodes, logical modules or software that implement all or part of its functions. Specifically, the service transmission method 200 includes:

In step S210 , the first station transmits at least one first PPDU with the third station using the first channel.

Specifically, the bandwidth of the first channel may be any bandwidth such as 20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz, 640 MHz, etc., and this application does not limit this.

Exemplarily, when the first site and the second site belong to the same BSS, the first channel may be the primary channel and the secondary channel of the BSS to which the first site and the second site belong. When the first site and the second site belong to different BSSs, the first channel may be the primary channel and the secondary channel of the BSS to which the first site belongs and the primary channel and the secondary channel of the BSS to which the second site belongs.

Step S212: The second site sends first information to the first site, where the first information is used to indicate that the second site requests service transmission. Correspondingly, the first site receives the first information.

Exemplarily, the first information may be the preemptive signal, and the preemptive signal may be a short training field (STF), or the preemptive signal may be STF+long training field (LTF), or the preemptive signal may be STF+LTF+signaling field (SIG).

Optionally, the first information is further used to indicate that the second station requests to use the third channel. Exemplarily, the second station may request to use the third channel to transmit at least one third PPDU with the fourth station.

In step S214, the first station transmits at least one second PPDU with the third station using a second channel, where the second channel is a part of the first channel.

Specifically, the above-mentioned “the second channel is a part of the above-mentioned first channel” can be understood as “the above-mentioned second channel is a partial channel of the above-mentioned first channel” or “the bandwidth of the above-mentioned second channel is a part of the bandwidth of the above-mentioned first channel” or “the frequency domain resources corresponding to the above-mentioned second channel are a part of the frequency domain resources corresponding to the above-mentioned first channel” or “the frequency domain range corresponding to the above-mentioned second channel is included in the frequency domain range corresponding to the above-mentioned first channel” or “the above-mentioned second channel is a subchannel of the above-mentioned first channel”, etc., and the present application does not impose any limitation on this.

Among them, "the bandwidth of the second channel is a partial bandwidth of the bandwidth of the first channel" means that the position of the bandwidth of the second channel is within the position of the bandwidth of the first channel, and also means that the size of the bandwidth of the second channel is smaller than the size of the bandwidth of the first channel.

Exemplarily, when the first site and the second site belong to the same BSS, the second channel may be the primary channel of the BSS to which the first site and the second site belong. When the first site and the second site belong to different BSSs and the secondary channel of the BSS to which the first site belongs is different from the secondary channel of the BSS to which the second site belongs, the second channel may be the primary channel, the secondary channel, or the secondary channel of the BSS to which the second site belongs, or the second channel may be the primary channel or the secondary channel of the BSS to which the first site belongs; when the first site and the second site belong to different BSSs and the secondary channel of the BSS to which the first site belongs is the same as the secondary channel of the BSS to which the second site belongs, the second channel may be the primary channel of the BSS to which the first site belongs, the secondary channel of the BSS to which the first site belongs, or the secondary channel of the BSS to which the second site belongs, or the second channel may be the primary channel of the BSS to which the first site belongs.

Specifically, for TXOP-level preemption, the at least one second PPDU may be the remaining PPDU of the first station during the transmission of at least one first PPDU, and the first station continues to transmit the at least one second PPDU after the transmission channel of the first station changes from the first channel to the second channel. Alternatively, the at least one second PPDU may be the PPDU of the new service transmitted by the first station. For PPDU-level preemption, the first station interrupts the transmission of the last first PPDU during the transmission of at least one first PPDU, and the first station retransmits the interrupted last first PPDU and continues to transmit the remaining PPDU or the PPDU of the new service after the transmission channel of the first station changes from the first channel to the second channel. The retransmitted interrupted last first PPDU and the continued transmission of the remaining PPDU may be considered as the at least one second PPDU, or the retransmitted interrupted last first PPDU and the PPDU of the new service may be considered as the at least one second PPDU.

Step S216: The second station transmits at least one third PPDU using the third channel, where the third channel is a part of the first channel.

Similarly, the above-mentioned “the third channel is part of the first channel” can be understood as “the above-mentioned third channel is a partial channel of the above-mentioned first channel” or “the bandwidth of the above-mentioned third channel is part of the bandwidth of the above-mentioned first channel” or “the frequency domain resources corresponding to the above-mentioned third channel are part of the frequency domain resources corresponding to the above-mentioned first channel” or “the frequency domain range corresponding to the above-mentioned third channel is included in the frequency domain range corresponding to the above-mentioned first channel” or “the above-mentioned third channel is a subchannel of the above-mentioned first channel”, etc., and the present application does not limit this.

Similarly, “the bandwidth of the third channel is a partial bandwidth of the bandwidth of the first channel” means that the bandwidth of the third channel is within the bandwidth of the first channel and that the bandwidth of the third channel is smaller than the bandwidth of the first channel. size.

Exemplarily, when the first site and the second site belong to the same BSS, the third channel may be a secondary channel of the BSS to which the first site and the second site belong. When the first site and the second site belong to different BSSs and the secondary channel of the BSS to which the first site belongs is different from the secondary channel of the BSS to which the second site belongs, the third channel may be the primary channel of the BSS to which the second site belongs, or the third channel may be the primary channel or the secondary channel of the BSS to which the second site belongs; when the first site and the second site belong to different BSSs and the secondary channel of the BSS to which the first site belongs is the same as the secondary channel of the BSS to which the second site belongs, the third channel may be the primary channel of the BSS to which the second site belongs, or the third channel may be the primary channel of the BSS to which the second site belongs, the secondary channel of the BSS to which the second site belongs, or the secondary channel of the BSS to which the first site belongs.

Exemplarily, the transmission delay of the at least one third PPDU is lower than the transmission delay of the at least one first PPDU or the at least one second PPDU, or the requirement of the at least one third PPDU on the delay performance is higher than the requirement of the at least one first PPDU or the at least one second PPDU on the delay performance. For example, the three PPDUs may be RATs, and the at least one first PPDU or the at least one second PPDU may be non-low-latency services. Alternatively, the at least one third PPDU is other services that need to be transmitted in a timely manner, which is not limited in the present application.

Through the above-mentioned service transmission method 200, when the service transmission of the first site is preempted, the first site can maintain the transmission of the original service and reserve a part of the channel for preemptive transmission by reducing the transmission channel of the original service, thereby reducing the impact on the original transmission of the first site.

Next, the method 200 for transmitting the above-mentioned service provided in the present application is described in detail by taking a first scenario in which the first site and the second site belong to different BSSs and a second scenario in which the first site and the second site belong to the same BSS as examples.

Exemplarily, the first site in the first scenario may be AP 110 in BSS1 of the network architecture 100, and the second site may be AP 120 in BSS2 of the network architecture 100. In this case, it can be considered that AP 120 needs to transmit an ultra-low-latency service data packet to a certain STA in BSS2, and AP 120 wants to occupy part of the channel for AP 110 and a certain STA in BSS1 to transmit non-low-latency service data packets. Therefore, AP 120 can send a preemptive signal to AP 110 on the main channel of BSS2. Alternatively, the first site may be AP 110 in BSS1 of the network architecture 100, and the second site may be STA 121 in BSS2 of the network architecture 100. In this case, it can be considered that STA 121 needs to transmit an ultra-low-latency service data packet to AP 120 in BSS2. In the example, STA 121 wants to occupy some channels for transmitting non-low-latency service data packets between AP 110 and a certain STA in BSS1, so STA 121 can send a preemptive signal to AP 110 on the main channel of BSS2; or, the first station can be STA 111 in BSS1 of the above network architecture 100 and the second station can be STA 121 in BSS2 of the above network architecture 100. At this time, it can be considered that STA 121 needs to transmit ultra-low-latency service data packets to AP 120 in BSS2, and STA 121 wants to occupy some channels for transmitting non-low-latency service data packets between STA 111 and a certain STA in BSS1, so STA 121 can send a preemptive signal to STA 111 on the main channel of BSS2, etc. This application is not limited. The following description specifically takes the first site in the first scenario as AP 110 in BSS1 of the above-mentioned network architecture 100, and the second site as AP 120 in BSS2 of the above-mentioned network architecture 100 as an example. The following Figures 3 to 6 correspond to the description based on the first scenario as an example. Exemplarily, in the first scenario, the third site may be STA 113 in BSS1 of the above-mentioned network architecture 100, and the fourth site may be STA 121 in BSS2 of the above-mentioned network architecture 100. It should be noted that the third site may also be other STAs in BSS1 of the above-mentioned network architecture 100, and the fourth site may also be other STAs in BSS2 of the above-mentioned network architecture 100, and the present application does not limit this.

As shown in FIG3 , before the occurrence of the occupation (i.e., before receiving the above-mentioned first information), AP 110 may transmit at least one first PPDU to STA 113 on the primary channel (primary channel), the secondary channel (secondary channel) of BSS1 and the primary channel and the secondary channel of BSS2, and there is a time interval #1 between any two adjacent PPDUs in the at least one PPDU. Exemplarily, the time interval #1 may be the short interframe space (SIFS) shown in FIG3 , and each SIFS may be 10 microseconds (μs). It should be noted that FIG3 only shows the primary channel of BSS1 and the primary channel of BSS2, but the transmission of at least one first PPDU may also be transmitted on the secondary channel of BSS1 and the secondary channel of BSS2. Among them, the primary channel and the secondary channel of BSS1 and the primary channel and the secondary channel of BSS2 here may be examples of the above-mentioned first channel.

Optionally, the above-mentioned time interval #1 can also be other forms of inter-frame intervals such as point coordination function interframe space (PIFS), which is not limited in this application.

When AP 120 has a preemptive service (e.g., the at least one third PPDU) to transmit, in order to enable AP 110 to detect the first information, AP 110 allows AP 120 to send the first information in the time interval #1. Accordingly, AP 110 detects the first information in the time interval #1, and AP 110 detects the first information in the first time interval and receives the first information. The first time interval belongs to the time interval #1.

Specifically, as shown in FIG3 , when the number of the at least one first PPDU and the number of the at least one second PPDU are 1, the first time interval is the time interval between the at least one first PPDU and the at least one second PPDU; when the number of the at least one first PPDU or the at least one second PPDU is greater than 1, the first time interval is the time interval between the last first PPDU of the at least one first PPDU and the first second PPDU of the at least one second PPDU. After receiving the first information in the first time interval, the AP 110 transmits the at least one second PPDU using a portion of the first channel (i.e., the second channel).

Furthermore, in order to enable AP 110 to accurately detect the first information and to reduce the resource overhead of AP 120 in sending the first information, AP 110 instructs AP 120 to send the first information at a time interval other than the second time and the third time in the time interval #1. Accordingly, AP 110 detects the first information at a time interval other than the second time and the third time in the time interval #1, and AP 110 detects the first information at a time interval other than the second time and the third time in the first time interval and receives the first information. The second time (aTxRxTurnaroundTime) is used for AP 110 to switch from a sending state to a receiving state, or the second time (aTxRxTurnaroundTime) is a delay for AP 110 to switch from a sending state to a receiving state; the third time (aRxTxTurnaroundTime) is used for AP 110 to switch from a receiving state to a sending state, or the third time (aRxTxTurnaroundTime) is a delay for AP 110 to switch from a receiving state to a sending state. For example, the time corresponding to "1" in FIG. 3 may be the second time, and the time corresponding to "2" in FIG. 3 may be the third time. Therefore, AP 120 sends the first information to AP 110 at a time interval other than the second time and the third time in the first time interval, which can increase the probability that AP 110 detects the first information and reduce the resource overhead of AP 120.

Exemplarily, the at least one first PPDU may further include first indication information, and the first indication information may indicate at least one of the following information:

The transmission period of the at least one first PPDU, the length of the at least one first PPDU, the period of sending or receiving the first information, the time interval of sending or receiving the first information, etc. Among them, the period of sending or receiving the first information can be considered as a preemption period (preemption period, PP), and the time interval of sending or receiving the first information can be considered as a preemption opportunity (preemption opportunity, PROP), and the PP or PROP can be considered to be the same as the transmission period of the at least one first PPDU, as shown in Figure 3. Exemplarily, the first indication information can include the first first PPDU sent in the at least one PPDU, which is not limited in this application. The time interval #1 can be considered as the time interval for sending or receiving the first information here.

Optionally, part or all of the at least one first PPDU may further include identification (ID) information of a sending site (i.e., the first site), ID information of a receiving site (i.e., the third site), resource allocation information, modulation and coding scheme (MCS) information, number of spatial and time streams (NSTS) information, etc. Exemplarily, the information may include the first PPDU sent first in the at least one PPDU, and the content of the information may be used as the information content of the first PPDU sent later, which is not limited in the present application.

When AP 110 receives the above-mentioned first information from AP 120, AP 110 reduces the channel for service transmission from the first channel to the second channel, and uses the second channel to transmit the above-mentioned at least one second PPDU with STA 113.

Specifically, the second channel can be determined in the following two ways:

Method 1 (the main channels corresponding to AP 110 and AP 120 are different): AP 110 receives the first information on the fourth channel, and AP 110 determines that part or all of the channels in the first channel except the fourth channel are the second channel.

Exemplarily, AP 120 sends the first information to AP 110 on its primary channel, and the second channel determined by AP 110 includes part or all of the first channel except the primary channel of AP 120. Exemplarily, as shown in FIG3 , AP 120 sends the first information on the primary channel of BSS2, and AP 110 determines that the primary channel of BSS1 is the second channel.

For another example, for the scenario of more BSSs shown in Figure 4, before the occurrence of the first information, AP 110 transmits at least one first PPDU with STA 113 on channel 1, channel 2, channel 3, and channel 4, wherein channel 1 corresponds to the main channel of BSS1, channel 3 corresponds to the main channel of BSS2, and channel 4 corresponds to the main channel of BSS3; when AP 110 receives the above-mentioned first information from AP 120 on the main channel of BSS2 and receives the above-mentioned first information from AP 130 on the main channel of BSS3, AP 110 determines that the channel corresponding to channel 1 and channel 2 is the second channel.

The position and/or size of the fourth channel for sending the first information by AP 120 may be limited within a predetermined range to avoid the situation where the fourth channel for sending the first information by AP 120 is occupied too much and causes the original transmission to be interrupted. For example, the fourth channel is in the high frequency band of the first channel, or the fourth channel is in the low frequency band of the first channel, or the bandwidth of the fourth channel is less than or equal to half of the bandwidth of the first channel, etc.

It should be noted that the “fourth channel” in “AP 120 sends the first information to AP 110 on the fourth channel to indicate that AP 120 wants to occupy the fourth channel for sending the first information for preemptive transmission” is the same as “the first information is used to indicate that AP 120 requests to use the third channel for transmission”. The "third channel" in the "preemptive transmission" may be the same, partially the same, or completely different, and this application does not limit this.

Mode 2 (AP 110 and AP 120 have the same primary channel): In Mode 1, AP 110 and AP 120 have different primary channels. Mode 2 occurs when AP 110 and AP 120 have the same primary channel. In this case, the primary channel of BSS1 is the same as the primary channel of BSS2.

As shown in FIG5 , before the occurrence of the occupation, AP 110 can transmit at least one first PPDU with STA 113 on channel 1 and channel 2, wherein channel 1 corresponds to the primary channel of BSS1 and the primary channel of BSS2, and channel 2 corresponds to the secondary channel of BSS1 and the secondary channel of BSS2; when AP 110 receives the above-mentioned first information from AP 120 on channel 1, the AP 110 sends the second information, and the second information is used to indicate the switching of the primary channel of AP 110 and the primary channel of AP 110 after the switching, and the above-mentioned second channel includes the primary channel of AP 110 after the switching. Exemplarily, AP 110 in FIG5 indicates through the second information that its primary channel is switched to channel 2, and transmits at least one second PPDU on channel 2 or a channel including channel 2.

As an example but not limitation, the second information can be carried in any wireless frame for transmission, or carried in the first second PPDU transmitted in the at least one second PPDU, as shown in FIG6 . Each second PPDU in the at least one second PPDU includes a signaling portion and a data portion of a header, and the second information can be carried in the signaling portion of the first second PPDU header. The signaling portion of the first second PPDU header is transmitted on both channel 1 and channel 2, and the data portion of the first second PPDU transmitted and subsequent second PPDUs are transmitted on channel 2.

After the sending site AP 110 determines the second channel, it is also necessary to notify the corresponding receiving site STA 113 of the determined second channel. Specifically, the at least one second PPDU may also include second indication information, and the second indication information is used to indicate the second channel. As an example and not a limitation, the second indication information may be carried in the first second PPDU sent in the at least one second PPDU, or the second indication information may also be carried in the same frame in which the second information is carried and sent.

Specifically, the third channel used for the AP 120 and the STA 121 to transmit at least one third PPDU can be determined in the following four ways:

Method 1: After the AP 110 determines the second channel, it will use the second channel to transmit at least one second PPDU. After the AP 110 starts to transmit at least one second PPDU, the AP 120 can monitor that the idle channel on the first channel is the third channel, and use the third channel to transmit at least one third PPDU, such as the scenarios shown in Figures 3, 5, and 6. For the scenario of more BSSs shown in Figure 4, after the AP 110 determines the second channel and uses the second channel to start transmitting at least one second PPDU, the AP 120 and the AP 130 can monitor that the idle channel on the first channel is an available channel. At this time, the AP 120 and the AP 130 need to compete for the channel. If the AP 120 successfully competes for the channel, and channel 4 corresponds to the main channel of BSS3, then the AP 120 determines that the main channel of BSS2 is the third channel. After the AP 120 starts to transmit at least one third PPDU using the third channel, the AP 130 can monitor that the idle channel on the first channel is channel 4, and the AP 130 uses channel 4 to transmit the preemptive service.

Exemplarily, the AP 120 may perform channel contention based on enhanced distributed channel access (EDCA), where a first EDCA parameter set for the AP 120 to perform channel contention based on EDCA may be different from a second EDCA parameter set used when the AP 120 performs other service transmission. The other services here may be considered as services when the AP 120 performs non-preemptive transmission.

Specifically, the first EDCA parameter set and the second EDCA parameter set include at least one of the following parameter information: minimum contention window (CWmin), maximum contention window (CMmax), TXOP threshold value (TXOPlimit), etc., wherein TXOPlimit indicates the longest time of occupying a channel. The smaller the minimum contention window, the smaller the maximum contention window, and the smaller the TXOPlimit in the EDCA parameter set, the higher the priority of channel contention and the greater the chance of obtaining access to the channel. Therefore, the first EDCA parameter set for AP 120 to perform channel contention based on EDCA will adopt parameter information with a smaller minimum contention window, a smaller maximum contention window, or a smaller TXOPlimit.

Mode 2: Part or all of the at least one first PPDU sent by AP 110 includes third indication information, and the third indication information is used to indicate the third channel. Alternatively, the third indication information is carried in other wireless frames (such as beacon frames, probe response frames, etc.) sent by AP 110. AP 120 can monitor at least one first PPDU, other wireless frames, etc. sent by AP 110.

Exemplarily, the third indication information includes one bit, the value of which is 1, indicating that AP 110 allows AP 120 to transmit at least one third PPDU on a portion of the first channel. Furthermore, the third indication information also includes N bits, which indicate the position and size of the third channel. For example, the N bits may form a bitmap, each of which represents a 20 MHZ bandwidth, and the bitmap [0110] indicates that the channel corresponding to the middle 40 MHZ bandwidth of the 80 MHZ bandwidth is the third channel. Alternatively, the N bits may form a bitmap [0101], indicating that the channel corresponding to the second 20 MHZ bandwidth of the 80 MHZ bandwidth and the channel corresponding to the fourth 20 MHZ bandwidth are the third channel.

Mode 3: The third channel may be determined according to the working channel of the AP 110 (ie, the first channel). Specifically, how the third channel is determined by the working channel of the AP 110 may be predefined.

Exemplarily, the bandwidth of the working channel of AP 110 is 320MHZ, the third channel may be a secondary channel of the working channel of AP 110, and the bandwidth of the third channel may be 160MHZ; or, the bandwidth of the working channel of AP 110 is 160MHZ, the third channel may be a secondary channel of the working channel of AP 110, and the bandwidth of the third channel may be 80MHZ; the bandwidth of the working channel of AP 110 is 80MHZ, the third channel may be a secondary channel of the working channel of AP 110, and the bandwidth of the third channel may be 40MHZ; the bandwidth of the working channel of AP 110 is 40MHZ, the third channel may be a secondary channel of the working channel of AP 110, and the bandwidth of the third channel may be 20MHZ.

Alternatively, the bandwidth of the working channel of AP 110 is 320MHZ, and the bandwidth of the third channel may be 160MHZ in the high frequency band of the working channel of AP 110. Alternatively, the bandwidth of the third channel may be 160MHZ in the low frequency band of the working channel of AP 110. Alternatively, the bandwidth of the third channel does not exceed 160MHZ and the position of the third bandwidth is not limited.

Method 4: The third channel mentioned above can be negotiated in advance by AP 110 and AP 120 through signaling interaction.

Exemplarily, a preemptive protocol is established between AP 110 and AP 120. AP 110 sends fourth information to AP 120, where the fourth information is used to indicate the configuration information of the third channel. The configuration information of the third channel includes information such as the bandwidth position and bandwidth size of the third channel. Optionally, AP 120 sends third information to AP 110, where the third information is used to request the configuration information of the third channel.

The negotiation process of method 4 above can be completed before AP 120 performs preemptive transmission.

The first station and the second station in the above-mentioned first scenario belong to different BSSs respectively, and the first station and the second station in the following second scenario belong to the same BSS. For example, the following second scenario is described by taking STA 111 in BSS1 as the first station and STA 112 in BSS1 as the second station. At this time, the above-mentioned third station and the above-mentioned fourth station corresponding to the second scenario are both the above-mentioned AP 110 in BSS1. At this time, it can be considered that STA 112 in BSS1 needs to transmit ultra-low latency service data packets to AP 110 in BSS1, and STA 112 wants to occupy part of the channel for STA 111 and AP 110 in BSS1 to transmit non-low latency service data packets, so STA 112 can send a preemptive signal to STA 111.

As shown in FIG7 , in the second scenario of the service transmission method 200 , before the occurrence of occupation, STA 111 and AP 110 transmit at least one first PPDU on the main channel of BSS1 and the secondary channel of BSS1 (or non-main channel), and the main channel of BSS1 and the secondary channel of BSS1 may be an example of the above-mentioned first channel; before the occurrence of occupation, STA 111 and AP 110 transmit at least one second PPDU on the main channel of BSS1, and the main channel of BSS1 may be an example of the above-mentioned second channel; STA 112 and AP 110 transmit at least one third PPDU on the secondary channel of BSS1 (or non-main channel), and the secondary channel of BSS1 may be an example of the above-mentioned third channel.

The rest of the second scenario can refer to the first scenario mentioned above and will not be repeated here.

When there is a preemptive transmission, the above-mentioned service transmission method 200 provided in the embodiment of the present application can keep the original transmission uninterrupted by reducing the channel of the original transmission, thereby reducing the impact on the original transmission.

The above-mentioned service transmission method 200 is the preemption of other sites on the sending site. The present application can also provide another service transmission method 300, which can reduce the impact of the sending site's own preemption on the original transmission of the sending site. When the sending site in the service transmission method 300 shown in Figure 8 detects that there is a service data packet with ultra-low latency requirements in the newly arrived cached data packet of the sending site, the sending site reduces the original transmission channel and reserves a part of the channel for the transmission of the service data packet with ultra-low latency requirements of the sending site. The main difference between the service transmission method 300 and the above-mentioned service transmission method 200 is that: there is no need to perform the above-mentioned step S212 and the above-mentioned at least one first PPDU, the above-mentioned at least one second PPDU and the above-mentioned at least one third PPDU are all transmitted by the sending site.

FIG8 is a schematic flow chart of a service transmission method 300 according to an embodiment of the present application. The service transmission method 300 includes:

In step S310 , the first station transmits at least one first PPDU with the third station using the first channel.

Step S312, when the first site detects that there is a service data packet with ultra-low latency requirement in the newly arrived cached data packet, the first site uses the second channel to transmit at least one second PPDU with the third site, and uses the third channel to transmit at least one third PPDU.

Specifically, the second channel is a part of the first channel, and the third channel is a part of the first channel, and the sum of the second channel and the third channel is less than or equal to the first channel.

Exemplarily, the at least one third PPDU may be a service data packet with ultra-low latency requirements transmitted between the first site and the fourth site, and the fourth site in the service transmission method 300 may be the third site in the service transmission method 300, or the fourth site may be other sites that can interact with the first site for data, and the present application does not limit this.

Specifically, for TXOP-level preemption, the at least one second PPDU may be the PPDU remaining in the process of transmitting at least one first PPDU by the first station, and the first station continues to transmit the at least one second PPDU after the transmission channel of the first station changes from the first channel to the second channel. Alternatively, the at least one second PPDU may be the PPDU of a new service transmitted by the first station. For PPDU-level preemption, the first station interrupts the transmission of the last first PPDU in the process of transmitting at least one first PPDU, and the first station retransmits the interrupted last first PPDU and continues to transmit the remaining PPDUs after the transmission channel of the first station changes from the first channel to the second channel. Or a PPDU of a new service. The last first PPDU of the interruption that is retransmitted and the remaining PPDUs that continue to be transmitted can be considered as the at least one second PPDU mentioned above, or the last first PPDU of the interruption that is retransmitted and the PPDU of the new service can be considered as the at least one second PPDU mentioned above.

Through the above-mentioned service transmission method 300, when the first site has an ultra-low latency service to be transmitted, there is no need to wait for the current service transmission to be completed before transmission can be performed. The transmission of the ultra-low latency service data packet can be executed immediately, thereby improving the service experience.

The above-mentioned service transmission method 200 and the above-mentioned service transmission method 300 provided in the embodiments of the present application reduce the impact on the original transmission and ensure the normal progress of the preemptive transmission by reducing the channel of the original transmission. The embodiments of the present application can also provide another service transmission method 800. The sending site in the service transmission method 800 still uses the original channel to transmit the original service after detecting the preemptive signal of other sites, and allows the preemptive site to also use the channel to transmit the preemptive service, but the sending site needs to reduce the power or MCS of the original service transmission to reduce the impact on the preemptive transmission; or, the preemptive site needs to reduce the power or MCS of the preemptive service transmission to reduce the impact on the original service.

Exemplarily, the first station (i.e., the sending station) in the following service transmission method 800 may be the AP 110 in the BSS1 of the above-mentioned network architecture 100, and the second station (i.e., the other station) may be the AP 120 in the BSS2 of the above-mentioned network architecture 100; or, the first station may be the AP 110 in the BSS1 of the above-mentioned network architecture 100, and the second station may be the STA 121 in the BSS2 of the above-mentioned network architecture 100; or, the first station may be the STA 111 in the BSS1 of the above-mentioned network architecture 100, and the second station may be the STA 121 in the BSS2 of the above-mentioned network architecture 100; or, the first station may be the STA 111 in the BSS1 of the above-mentioned network architecture 100, and the second station may be the STA 112 in the BSS1 of the above-mentioned network architecture 100, etc., and the present application does not limit the specific forms of the first station and the second station. It can be seen that the first station and the second station may belong to the same BSS or to different BSSs.

FIG9 is a schematic flow chart of a service transmission method 800 of an embodiment of the present application. It should be noted that FIG9 uses the first site and the second site as the execution subjects of the interactive schematic to illustrate the method, but the present application does not limit the execution subjects of the interactive schematic. Exemplarily, the first site and the second site in FIG9 may also be chips, chip systems or processors that support the implementation of the method, or may be logical nodes, logical modules or software that implement all or part of its functions. Specifically, the service transmission method 800 includes:

In step S810 , the first station transmits at least one first PPDU with the third station using a first channel based on a first parameter.

Specifically, the bandwidth of the first channel may be any bandwidth such as 20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz, 640 MHz, etc., and this application does not limit this.

Step S812: The second site sends first information to the first site, where the first information is used to indicate that the second site requests service transmission. Correspondingly, the first site receives the first information.

Exemplarily, the first information may be a preemptive signal, and the preemptive signal may be STF, or the preemptive signal may be STF+LTF, or the preemptive signal may be STF+LTF+SIG.

Optionally, the first information is further used to indicate that the second station requests to use the first channel. Exemplarily, the second station may request to use the first channel to transmit at least one third PPDU with the fourth station.

Step S814: The first station transmits at least one second PPDU with the third station using the first channel based on the second parameter.

Specifically, the first parameter includes the power of the first site transmitting the at least one first PPDU or the MCS of the first site transmitting the at least one first PPDU, and the second parameter includes the power of the first site transmitting the at least one second PPDU or the MCS of the first site transmitting the at least one second PPDU. The power represented by the second parameter is lower than the power represented by the first parameter, or the MCS represented by the second parameter is lower than the MCS represented by the first parameter.

The MCS includes a coding rate and/or a modulation order, and the MCS represented by the second parameter is lower than the MCS represented by the first parameter, including: the coding rate represented by the second parameter is lower than the coding rate represented by the first parameter and/or the modulation order represented by the second parameter is lower than the modulation order represented by the first parameter.

Modulation can define how many bits a single resource element (RE) carries. The current 5G NR supports modulation methods such as QPSK, 16-QAM, 64-QAM, and 256-QAM. With QPSK modulation, each RE can carry 2 bits; with 16-QAM modulation, each RE can carry 4 bits; with 64-QAM modulation, each RE can carry 6 bits; with 256-QAM modulation, each RE can carry 8 bits, etc. The 16, 64, 256, etc. shown here are the modulation orders.

The code rate defines the ratio of useful bits to the total transmitted bits.

Exemplarily, different MCS indices (MCS index) correspond to different coding rates (code rate) and/or modulation orders (modulation order), as shown in Table 1 below.

Table 1

Exemplarily, when the first site uses a modulation order of 1024 corresponding to the modulation mode 1024-QAM to transmit at least one first PPDU on the first channel, after receiving the first information, the first site uses a modulation order of 256 corresponding to the modulation mode 256-QAM to transmit at least one second PPDU on the first channel; or, when the first site uses a coding rate of 5/6 corresponding to the modulation mode 256-QAM to transmit at least one first PPDU on the first channel, after receiving the first information, the first site uses a coding rate of 3/4 corresponding to the modulation mode 256-QAM to transmit at least one second PPDU on the first channel. The present application does not limit this.

Optionally, the power with which the first site transmits the at least one second PPDU may be lower than the maximum transmission power of the first site, or the MCS with which the first site transmits the at least one second PPDU may be lower than the highest MCS of the first site.

Specifically, for TXOP-level preemption, the at least one second PPDU may be the remaining PPDU of the first station during the transmission of at least one first PPDU, and the first station continues to transmit the at least one second PPDU using the first channel after receiving the first information. Alternatively, the at least one second PPDU may be the PPDU of a new service transmitted by the first station using the first channel after receiving the first information. For PPDU-level preemption, the first station interrupts the transmission of the last first PPDU during the transmission of at least one first PPDU, and the first station retransmits the interrupted last first PPDU and continues to transmit the remaining PPDU or the PPDU of the new service using the first channel after receiving the first information. The retransmitted interrupted last first PPDU and the continued transmission of the remaining PPDU may be considered as the at least one second PPDU, or the retransmitted interrupted last first PPDU and the PPDU of the new service may be considered as the at least one second PPDU.

Optionally, in step S816, the first site indicates a third parameter to the second site, where the third parameter includes a first power for the second site to transmit at least one third PPDU or a first MCS for the second site to transmit at least one third PPDU.

Specifically, the third parameter can be determined in the following three ways:

Mode 1: Some or all of the at least one first PPDU sent by the first station include fourth indication information, and the fourth indication information is used to indicate the third parameter. Alternatively, the fourth indication information is carried in other wireless frames (such as beacon frames, probe response frames, etc.) sent by the first station. The second station can monitor at least one first PPDU, other wireless frames, etc. sent by the first station.

Method 2: The third parameter may be predefined.

Exemplarily, the first power or the first MCS included in the third parameter may be predefined in advance.

Method three: the third parameter may be negotiated in advance between the first site and the second site through signaling interaction.

Exemplarily, a preemptive protocol is established between the first station and the second station. The first station sends fifth information to the second station, where the fifth information is used to indicate the third parameter.

Optionally, the second site sends sixth information to the first site, where the sixth information is used to request a third parameter.

The negotiation process of the above-mentioned method 3 can be completed before the second station performs preemptive transmission.

Step S816: The second station transmits at least one third PPDU using the first channel based on the third parameter.

Exemplarily, the second site transmits at least one third PPDU using the first channel based on the first power, or the second site transmits at least one third PPDU based on the first MCS.

Alternatively, the above-mentioned step S816 may not be performed, in which case the above-mentioned second site transmits at least one third PPDU with a power lower than the maximum transmission power of the second site, or the above-mentioned second site transmits at least one third PPDU with an MCS lower than the highest MCS of the second site.

Specifically, the maximum transmit power of the second site and the highest MCS of the second site may be determined in the following three ways:

Mode 1: Some or all of the at least one first PPDU sent by the first station include fifth indication information, and the fifth indication information is used to indicate the maximum transmission power of the second station or the highest MCS of the second station. Alternatively, the fifth indication information is carried in other radio frames (such as beacon frames, detection response frames, etc.) sent by the first station. The second station can monitor at least one first PPDU, other radio frames, etc. sent by the first station.

Method 2: The maximum transmission power of the second site or the highest MCS of the second site may be predefined.

Exemplarily, the maximum transmission power of the second site or the highest MCS of the second site may be predefined in advance.

Method three: the maximum transmission power of the second site or the highest MCS of the second site may be negotiated in advance between the first site and the second site through signaling interaction.

Exemplarily, a preemptive protocol is established between the first station and the second station. The first station sends seventh information to the second station, where the seventh information is used to indicate the maximum transmit power of the second station or the highest MCS of the second station.

Optionally, the second site sends eighth information to the first site, where the eighth information is used to request a maximum transmission power of the second site or a highest MCS of the second site.

The negotiation process of the above-mentioned method 3 can be completed before the second station performs preemptive transmission.

Exemplarily, the transmission delay of the at least one third PPDU is lower than the transmission delay of the at least one first PPDU or the at least one second PPDU. For example, the at least one third PPDU may be a RAT, the at least one first PPDU or the at least one second PPDU may be a non-low-latency service, or the at least one third PPDU may be other services that need to be transmitted in a timely manner, which is not limited in this application.

Through the above-mentioned service transmission method 800, when the service transmission of the first site is preempted, the first site can maintain the transmission of the original service and reduce the impact on the preempted service transmission by reducing the transmission parameters of the original service or reducing the transmission parameters of the preempted service. It can reduce the impact on the original transmission of the first site and reduce the impact on the preempted service.

Next, the method 800 for transmitting the above-mentioned service provided in the present application is described in detail by taking a first scenario in which the first site and the second site belong to different BSSs and a second scenario in which the first site and the second site belong to the same BSS as examples.

In the first scenario, the first station may be AP 110 in BSS1 of the network architecture 100, and the second station may be AP 120 in BSS2 of the network architecture 100. In this case, it can be considered that AP 120 needs to transmit ultra-low-latency service data packets to a certain STA in BSS2, and AP 120 wants to occupy the channel for AP 110 and a certain STA in BSS1 to transmit non-low-latency service data packets. Alternatively, the first station may be AP 110 in BSS1 of the network architecture 100, and the second station may be STA 121 in BSS2 of the network architecture 100. In this case, it can be considered that STA 121 1 needs to transmit ultra-low latency service data packets to AP 120 in BSS2, and STA 121 wants to occupy the channel for non-low latency service data packets transmitted between AP 110 and a certain STA in BSS1; or, the first station can be STA 111 in BSS1 of the above-mentioned network architecture 100 and the second station can be STA 121 in BSS2 of the above-mentioned network architecture 100. At this time, it can be considered that STA 121 needs to transmit ultra-low latency service data packets to AP 120 in BSS2, and STA 121 wants to occupy the channel for non-low latency service data packets transmitted between STA 111 and a certain STA in BSS1, etc. This application is not limited. The following specifically describes the first scenario in which the first station is AP 110 in BSS1 of the above-mentioned network architecture 100 and the second station is AP 120 in BSS2 of the above-mentioned network architecture 100. Figure 10 below corresponds to the description of the first scenario of the service transmission method 800 as an example. Exemplarily, in the first scenario, the third station may be STA 113 in BSS1 of the network architecture 100, and the fourth station may be STA 121 in BSS2 of the network architecture 100. It should be noted that the third station may also be other STAs in BSS1 of the network architecture 100, and the fourth station may also be other STAs in BSS2 of the network architecture 100, which is not limited in the present application.

As shown in FIG10, before the occurrence of the occupation (i.e., before receiving the above-mentioned first information), AP 110 may transmit at least one first PPDU with STA 113 on the primary channel of BSS1, the secondary channel of BSS1, the primary channel of BSS2, and the secondary channel of BSS2, and there is a time interval #1 between any two adjacent PPDUs in the at least one PPDU. Exemplarily, the time interval #1 may be the SIFS shown in FIG10, and each SIFS may be 10 microseconds (μs). Among them, the primary channel of BSS1, the secondary channel of BSS1, the primary channel of BSS2, and the secondary channel of BSS2 shown in FIG10 may be an example of the above-mentioned first channel. It should be noted that FIG10 only shows the primary channel of BSS1 and the primary channel of BSS2, but the transmission of at least one first PPDU may also be transmitted on the secondary channel of BSS1 and the secondary channel of BSS2.

Optionally, the time interval #1 may also be other forms of inter-frame intervals such as PIFS, which is not limited in the present application.

When AP 120 has a preemptive service (e.g., the at least one third PPDU) to transmit, in order to enable AP 110 to detect the first information, AP 110 allows AP 120 to send the first information in the time interval #1. Accordingly, AP 110 detects the first information in the time interval #1, and AP 110 detects the first information in the first time interval and receives the first information.

Specifically, as shown in FIG10 , when the number of the at least one first PPDU and the number of the at least one second PPDU are 1, the first time interval is the time interval between the at least one first PPDU and the at least one second PPDU; when the number of the at least one first PPDU or the number of the at least one second PPDU is greater than 1, the first time interval is the time interval between the last first PPDU of the at least one first PPDU and the first second PPDU of the at least one second PPDU. After receiving the first information at the first time interval, the AP 110 transmits the at least one second PPDU using the first channel based on the second parameter.

Furthermore, in order to enable AP 110 to accurately detect the first information and to reduce the resource overhead of AP 120 in sending the first information, AP 110 instructs AP 120 to send the first information at a time interval other than the second time and the third time in the time interval #1. Accordingly, AP 110 detects the first information at a time interval other than the second time and the third time in the time interval #1, and AP 110 detects the first information at a time interval other than the second time and the third time in the first time window and receives the first information. The second time (aTxRxTurnaroundTime) is used for AP 110 to switch from a sending state to a receiving state, or the second time (aTxRxTurnaroundTime) is a delay for AP 110 to switch from a sending state to a receiving state; the third time (aRxTxTurnaroundTime) is used for AP 110 to switch from a receiving state to a sending state, or the third time (aRxTxTurnaroundTime) is a delay for AP 110 to switch from a receiving state to a sending state. Exemplarily, the time corresponding to "1" in FIG. 10 may be the second time, and the time corresponding to "2" in FIG. 9 may be the third time. Therefore, AP 120 sends the first information to AP 110 at a time interval other than the second time and/or the third time in the first time interval, which can increase the probability that AP 110 detects the first information and reduce the resource overhead of AP 120.

Exemplarily, the at least one first PPDU may further include first indication information, and the first indication information may indicate at least one of the following information:

The transmission period of at least one first PPDU, the length of at least one first PPDU, the period for sending or receiving the above-mentioned first information, the time interval for sending or receiving the above-mentioned first information, etc. Among them, the period for sending or receiving the above-mentioned first information can be considered as PP, and the time interval for sending or receiving the above-mentioned first information can be considered as PROP, and the PP or PROP can be considered to be the same as the transmission period of the above-mentioned at least one first PPDU, as shown in Figure 9. Exemplarily, the first indication information can include the first first PPDU sent in the above-mentioned at least one PPDU, and this application does not limit this. The above-mentioned time interval #1 can be considered as the time interval for sending or receiving the above-mentioned first information here.

Optionally, part or all of the at least one first PPDU may also include the ID information of the sending site, the ID information of the receiving site, resource allocation information, MCS information, NSTS information, etc. Exemplarily, the information may include the first PPDU sent first in the at least one PPDU, and the content of the information may be used as the information content of the first PPDU sent later, which is not limited in the present application.

When AP 110 receives the above-mentioned first information from AP 120, AP 110 does not change the channel for service transmission, but reduces the parameters for service transmission.

The first station and the second station of the first scenario of the above-mentioned service transmission method 800 belong to different BSSs respectively, and the first station and the second station of the following second scenario belong to the same BSS. For example, the following second scenario is described by taking STA 111 in BSS1 as the first station and STA 112 in BSS1 as the second station. At this time, the above-mentioned third station and the above-mentioned fourth station corresponding to the second scenario are both the above-mentioned AP 110 in BSS1. At this time, it can be considered that STA 112 in BSS1 needs to transmit ultra-low latency service data packets to AP 110 in BSS1, and STA 112 wants to occupy the channel for STA 111 and AP 110 in BSS1 to transmit non-low latency service data packets, so STA 112 can send a preemptive signal to STA 111.

As shown in FIG. 11 , in the second scenario of the service transmission method 800 , before the occurrence of occupation, STA 111 and AP 110 transmit at least one first PPDU on the primary channel of BSS1 and the secondary channel (or non-primary channel) of BSS1; before the occurrence of occupation, STA 111 and AP 110 transmit at least one second PPDU on the primary channel of BSS1 and the secondary channel (or non-primary channel) of BSS1. And before the occurrence of occupation, STA 112 and AP 110 also transmit at least one third PPDU on the primary channel of BSS1 and the secondary channel (or non-primary channel) of BSS1. The primary channel of BSS1 and the secondary channel of BSS1 here are examples of the first channel mentioned above.

The rest of the second scenario can refer to the first scenario mentioned above and will not be repeated here.

When there is a preemptive transmission, the method 800 for transmitting the service provided in the embodiment of the present application can reduce the transmission parameters of the original service or reduce the transmission parameters of the preemptive service, thereby maintaining the original transmission without interruption and reducing the impact on the preemptive service. In the method 800 for transmitting a service, AP 110 transmits at least one second PPDU on the first channel before the preemption occurs, so that AP 120 considers that the first channel is busy during channel contention, and AP 120 may not be able to transmit at least one third PPDU on the first channel.

Based on the above problems, the present application proposes a solution: when performing channel contention, the AP 120 uses a higher clear channel assessment (CCA) threshold value to determine whether the first channel is idle. For example, the CCA threshold value for channel contention is set higher than the first threshold value or a higher CCA threshold value is set.

Specifically, the CCA threshold value or the first threshold value may be determined in the following three ways:

Mode 1: The at least one first PPDU sent by the AP 110 carries sixth indication information, and the sixth indication information is used to indicate the CCA threshold value or the first threshold value, or the sixth indication information is carried in part of the at least one first PPDU, or the sixth indication information is carried in other wireless frames (such as beacon frames or probe response frames, etc.) sent by the AP 110. The AP 120 can monitor the at least one first PPDU, other wireless frames, etc. sent by the AP 110.

Mode 2: the CCA threshold value or the first threshold value may be predefined.

Exemplarily, the CCA threshold value or the first threshold value mentioned above may be predefined in advance.

Method three: The above-mentioned CCA threshold value or the above-mentioned first threshold value can be negotiated in advance between AP 110 and AP 120.

Exemplarily, a preemptive protocol is established between AP 120 and AP 120. AP 120 sends an interaction request frame to AP 110 to request a CCA threshold value or the first threshold value for channel contention; AP 110 sends a response frame to AP 120 to indicate the CCA threshold value or the first threshold value.

By setting a higher CCA threshold value or setting the CCA threshold value higher than a certain threshold value, the success rate of channel contention when the preemptive station uses the same channel as the sending station to perform preemptive service transmission can be improved.

The above-mentioned service transmission method 800 is the preemption of the sending site by other sites. The present application can also provide another service transmission method 900, which can reduce the impact of the preemption of the sending site itself on the original transmission of the sending site. When the sending site in the service transmission method 900 shown in Figure 12 detects that there is a service data packet with ultra-low latency requirements in the newly arrived cache data packet of the sending site, the sending site still uses the original channel to transmit the original service, and allows the service data packet with ultra-low latency requirements of the sending site to be transmitted on the channel. However, the sending site needs to reduce the power or MCS of the original service transmission to reduce the impact on the preemptive transmission; or, the preemptive site needs to reduce the power or MCS of the preemptive service transmission to reduce the impact on the original service. The main difference between the service transmission method 900 and the above-mentioned service transmission method 800 is that: there is no need to perform the above-mentioned step S812 and the above-mentioned at least one first PPDU, the above-mentioned at least one second PPDU and the above-mentioned at least one third PPDU are all transmitted by the sending site.

FIG12 is a schematic flow chart of a service transmission method 900 according to an embodiment of the present application. The service transmission method 900 includes:

In step S910 , the first station transmits at least one first PPDU with the third station using a first channel based on a first parameter.

Step S912, when the first site detects that there is a service data packet with ultra-low latency requirements in the newly arrived cached data packets, the first site uses the above-mentioned first channel to transmit at least one second PPDU with the third site based on the second parameters, and uses the above-mentioned first channel to transmit at least one third PPDU based on the third parameters.

Specifically, the first parameter includes the power of the first site transmitting the at least one first PPDU or the MCS of the first site transmitting the at least one first PPDU, and the second parameter includes the power of the first site transmitting the at least one second PPDU or the MCS of the first site transmitting the at least one second PPDU. The power represented by the second parameter is lower than the power represented by the first parameter, or the MCS represented by the second parameter is lower than the MCS represented by the first parameter.

The MCS includes a code rate and/or a modulation order, and the MCS represented by the second parameter is lower than the MCS represented by the first parameter, including: the code rate represented by the second parameter is lower than the code rate represented by the first parameter and/or the modulation order represented by the second parameter is lower than the modulation order represented by the first parameter. For further description of modulation and code rate, reference may be made to the relevant contents of the service transmission method 800, which will not be repeated here.

Specifically, the third parameter includes the power of the first site transmitting the at least one third PPDU or the MCS of the first site transmitting the at least one third PPDU, wherein the power represented by the third parameter is lower than the power represented by the first parameter, or the MCS represented by the third parameter is lower than the MCS represented by the first parameter.

The MCS includes a code rate and/or a modulation order, and the MCS represented by the third parameter is lower than the MCS represented by the first parameter, including: the code rate represented by the third parameter is lower than the code rate represented by the first parameter and/or the modulation order represented by the third parameter is lower than the modulation order represented by the first parameter. For further description of modulation and code rate, reference may be made to the relevant contents of the service transmission method 800, which will not be repeated here.

Exemplarily, the at least one third PPDU may be a service data packet with ultra-low latency requirements transmitted by the first station and the fourth station, and the fourth station in the service transmission method 900 may be the third station in the service transmission method 900, or the fourth station may be This application does not limit other sites that can interact with the first site for data.

Specifically, for TXOP-level preemption, the at least one second PPDU may be the remaining PPDU of the first station during the transmission of at least one first PPDU, and the first station continues to transmit the at least one second PPDU using the first channel after receiving the first information. Alternatively, the at least one second PPDU may be the PPDU of a new service transmitted by the first station using the first channel after receiving the first information. For PPDU-level preemption, the first station interrupts the transmission of the last first PPDU during the transmission of at least one first PPDU, and the first station retransmits the interrupted last first PPDU and continues to transmit the remaining PPDU or the PPDU of the new service using the first channel after receiving the first information. The retransmitted interrupted last first PPDU and the continued transmission of the remaining PPDU may be considered as the at least one second PPDU, or the retransmitted interrupted last first PPDU and the PPDU of the new service may be considered as the at least one second PPDU.

Through the above-mentioned service transmission method 900, when the first site has an ultra-low latency service to be transmitted, there is no need to wait for the current service transmission to be completed before transmission can be performed. The transmission of ultra-low latency service data packets can be executed immediately, thereby improving the service experience.

Finally, the device embodiment of the embodiment of the present application is introduced.

In order to implement the functions in the method provided in this application, the terminal device and the network device may include a hardware structure and/or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

13 is a schematic block diagram of a communication device 1100 according to an embodiment of the present application. The communication device 1100 includes a processor 1110 and a communication interface 1120, and the processor 1110 and the communication interface 1120 may be interconnected via a bus 1130. The communication device 1100 may be a first site or a second site.

Optionally, the communication device 1100 may further include a memory 1140. The memory 1140 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a portable read-only memory (CD-ROM), and the memory 1140 is used to store relevant instructions and data.

The processor 1110 may be one or more central processing units (CPUs). In the case where the processor 1110 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

When the communication device 1100 is a first site, illustratively, the communication device 1100 is used to perform the following operations: receiving first information from a second site, etc.

When the communication device 1100 is the second site, illustratively, the communication device 1100 is used to perform the following operations: sending first information to the first site, etc.

The above contents are only exemplary descriptions. When the communication device 1100 is the first site/the second site, it will be responsible for executing the methods or steps related to the first site/the second site in the above method embodiments.

The above description is only an exemplary description. For specific content, please refer to the content shown in the above method embodiment. The implementation of each operation in Figure 13 can also correspond to the corresponding description of the method embodiment shown in Figures 2 to 12.

FIG14 is a schematic block diagram of a communication device 1200 according to an embodiment of the present application. The communication device 1200 may be a first site or a second site, or may be a chip or module in the first site or the second site, for implementing the method involved in the above embodiment. The communication device 1200 includes a transceiver unit 1210. The transceiver unit 1210 and the processing unit 1220 are exemplarily introduced below.

The transceiver unit 1210 may include a sending unit and a receiving unit. The sending unit is used to perform the sending action of the communication device 1200, and the receiving unit is used to perform the receiving action of the communication device 1200. For ease of description, the embodiment of the present application combines the sending unit and the receiving unit into one transceiver unit. A unified description is given here, and no further description is given later.

When the communication device 1200 is a first station, illustratively, the transceiver unit 1210 receives first information from a second station, and the processing unit 1220 is configured to transmit the at least one second PPDU using the second channel.

When the communication device 1200 is the second site, illustratively, the transceiver unit 1210 is used to send the first information to the first site, and the processing unit 1220 is used to transmit the at least one third PPDU using the third channel.

The above contents are only exemplary descriptions. When the communication device 1200 is the first station or the second station, it will be responsible for executing the methods or steps related to the first station or the second station in the above method embodiments.

Optionally, the communication device 1200 further includes a storage unit 1230, where the storage unit 1230 is used to store a program or code for executing the aforementioned method.

The device embodiments shown in Figures 13 and 14 are used to implement the contents described in Figures 2 to 12. The specific execution steps and methods of the devices shown in Figures 13 and 14 can refer to the contents described in the above method embodiments.

Fig. 15 is a schematic block diagram of a communication device 1300 according to an embodiment of the present application. The communication device 1300 is used to implement the functions of the first site/the second site. The communication device 1300 may be a chip in the first site/the second site.

The communication device 1300 includes: an input/output interface 1320 and a processor 1310. The input/output interface 1320 may be an input/output circuit. The processor 1310 may be a signal processor, a chip, or other integrated circuit that can implement the method of the present application. The input/output interface 1320 is used for inputting or outputting signals or data.

For example, when the communication device 1300 is a first station, the input/output interface 1320 is configured to receive first information from the first station. The processor 1310 is configured to transmit at least one second PPDU using a second channel.

For example, when the communication device 1300 is a second station, the input/output interface 1320 is used to send the first information to the first station. The processor 1310 is used to transmit at least one third PPDU using a third channel.

In one possible implementation, the processor 1310 implements the functions implemented by the first site or the second site by executing instructions stored in the memory.

Optionally, the communication device 1300 also includes a memory.

Optionally, the processor and memory are integrated together.

Optionally, the memory is outside the communication device 1300 .

In a possible implementation, the processor 1310 may be a logic circuit, and the processor 1310 inputs/outputs messages or signals through the input/output interface 1320. The logic circuit may be a signal processor, a chip, or other integrated circuit that can implement the method of the embodiment of the present application.

The above description of the communication device 1300 is only an exemplary description. The communication device 1300 can be used to execute the method described in the above embodiment. The specific content can be found in the description of the above method embodiment, which will not be repeated here.

The present application also provides a chip, including a processor, for calling and executing instructions stored in a memory from the memory, so that a communication device equipped with the chip executes the methods in the above examples.

The present application also provides a chip, including: an input interface, an output interface, and a processor, wherein the input interface, the output interface, and the processor are connected via an internal connection path, and the processor is used to execute the code in the memory, and when the code is executed, the processor is used to execute the method in each of the above examples. Optionally, the chip also includes a memory, and the memory is used to store computer programs or codes.

The present application also provides a processor, which is coupled to a memory and is used to execute the methods and functions involving a network device or a terminal device in any of the above embodiments.

The present application provides a computer program product including instructions. When the computer program product is run on a computer, the method of the above embodiment is implemented.

The present application also provides a computer program. When the computer program is executed in a computer, the method of the above embodiment is implemented.

The present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a computer, the method described in the above embodiment is implemented.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

In several embodiments provided in the present application, the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the technical solution of the embodiment of the present application.

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, or each unit can be physically separate. It is possible for two or more units to be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of each method embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.

The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (35)

A communication method, characterized in that the method comprises: The first station transmits at least one first PPDU with the third station using the first channel; The first site receives first information, where the first information is used to indicate that the second site requests to perform service transmission; The first station transmits at least one second PPDU with the third station using a second channel, the second channel being a portion of the first channel. The method according to claim 1, wherein the at least one first PPDU includes first indication information, and the first indication information is used to indicate at least one of the following information: The sending period of the at least one first PPDU, the length of the at least one first PPDU, the period of sending or receiving the first information, and the time interval of sending or receiving the first information. The method according to claim 1 or 2, characterized in that when the number of the at least one first PPDU and the number of the at least one second PPDU are 1, there is a first time interval between the first PPDU and the second PPDU, and the first station receives the first information, comprising: The first station receives the first information at the first time interval. The method according to claim 1 or 2, characterized in that when the number of the at least one first PPDU or the number of the at least one second PPDU is greater than 1, there is a first time interval between the last first PPDU of the at least one first PPDU and the first second PPDU of the at least one second PPDU, and the first station receives the first information, comprising: The first station receives the first information at the first time interval. The method according to claim 3 or 4 is characterized in that the first time interval also includes a second time and a third time, the second time is used for the first station to switch from a sending state to a receiving state, the third time is used for the first station to switch from a receiving state to a sending state, and the first station receives the first information in the first time interval, comprising: The first station receives the first information at a time interval other than the second time and the third time in the first time interval. The method according to any one of claims 1 to 5, characterized in that the first station receives the first information, comprising: The first station receives the first information on a fourth channel, the fourth channel being a part of the first channel; The method further comprises: The first station determines channels other than the fourth channel among the first channels as the second channels. The method according to claim 6 is characterized in that the fourth channel is in the high frequency band part of the first channel, or the fourth channel is in the low frequency band part of the first channel, or the bandwidth of the fourth channel is less than or equal to half of the bandwidth of the first channel. The method according to any one of claims 1 to 5, characterized in that when the primary channel of the first station is the same as the primary channel of the second station, the first station receiving the first information comprises: The first station receives the first information on the primary channel; The method further comprises: The first site sends second information, where the second information is used to indicate switching of a primary channel of the first site, and the second channel includes the primary channel of the first site after switching. The method according to claim 8 is characterized in that the second information is also used to indicate the primary channel of the first site after switching. The method according to any one of claims 1 to 9, characterized in that the at least one second PPDU includes second indication information, and the second indication information is used to indicate the second channel. The method according to any one of claims 1 to 10, characterized in that the first information is also used to indicate that the second station requests to use a third channel, and the third channel is a part of the first channel. The method according to claim 11, characterized in that the third channel is predefined based on the first channel. The method according to claim 11 is characterized in that the at least one first PPDU includes third indication information, and the third indication information is used to indicate a third channel, and the third channel is used for the second site to transmit at least one third PPDU. The method according to claim 11, characterized in that the method further comprises: The first station sends fourth information to the second station, where the fourth information is used to indicate configuration information of the third channel. The method according to claim 14, characterized in that the method further comprises: The first station receives third information, where the third information is used to request configuration information of the third channel. A communication method, characterized in that the method comprises: The second site sends first information to the first site, where the first information is used to indicate that the second site requests service transmission; The second station transmits at least one third PPDU using a third channel, where the third channel is a part of a first channel, and the first channel is used for the first station and the third station to transmit at least one first PPDU. The method according to claim 16, wherein the at least one first PPDU includes first indication information, and the first indication information is used to indicate at least one of the following information: The sending period of the at least one first PPDU, the length of the at least one first PPDU, the period of sending or receiving the first information, and the time interval of sending or receiving the first information. The method according to claim 16 or 17, characterized in that the second station sends the first information to the first station, comprising: The second station sends the first information at a first time interval, When the number of the at least one first PPDU and the number of the at least one second PPDU are 1, the first time interval is the time interval between the first PPDU and the second PPDU, the second PPDU is a PPDU transmitted by the first site and the third site on a second channel, and the second channel is a part of the first channel. The method according to claim 16 or 17, characterized in that the second station sends the first information to the first station, comprising: The second station sends the first information at a first time interval, When the number of the at least one first PPDU or the number of the at least one second PPDU is greater than 1, the first time interval is the time interval between the last first PPDU of the at least one first PPDU and the first second PPDU of the at least one second PPDU, and the at least one second PPDU is a PPDU transmitted by the first site and the third site on a second channel, and the second channel is part of the first channel. The method according to claim 18 or 19, wherein the second station sends the first information at the first time interval, comprising: The second station sends the first information at a time interval other than a second time and a third time in the first time interval, the second time is used for the first station to switch from a sending state to a receiving state, and the third time is used for the first station to switch from a receiving state to a sending state. The method according to any one of claims 18 to 20, characterized in that the second station sends the first information to the first station, comprising: The second station sends the first information to the first station on a fourth channel. The method according to claim 21 is characterized in that the fourth channel is in the high frequency band part of the first channel, or the fourth channel is in the low frequency band part of the first channel, or the bandwidth of the fourth channel is less than or equal to half of the bandwidth of the first channel. The method according to any one of claims 18 to 20, characterized in that when the primary channel of the first site is the same as the primary channel of the second site, the second site sending the first information to the first site comprises: The second station sends the first information to the first station on the primary channel; The method further comprises: The second station receives second information from the first station, where the second information is used to instruct switching of a primary channel of the first station, and the second channel includes the primary channel of the first station after switching. The method according to claim 23 is characterized in that the second information is also used to indicate the primary channel of the first site after switching. The method according to any one of claims 18 to 24 is characterized in that the at least one second PPDU includes second indication information, and the second indication information is used to indicate the second channel. The method according to any one of claims 16 to 25, characterized in that the method further comprises: The second station determines the third channel according to the first channel. The method according to any one of claims 16 to 25 is characterized in that the at least one first PPDU includes third indication information, and the third indication information is used to indicate the third channel. The method according to any one of claims 16 to 25, characterized in that the method further comprises: The second station receives fourth information from the first station, where the fourth information is used to indicate configuration information of the third channel. The method according to claim 28, characterized in that the method further comprises: The second station receives third information, where the third information is used to request configuration information of the third channel. A communication device, comprising: a processor, the processor being configured to execute a computer program or instruction, The communication device is caused to execute the method according to any one of claims 1 to 15, or the communication device is caused to execute the method according to any one of claims 16 to 29. The communication device according to claim 30 is characterized in that the communication device also includes a memory, and the memory is used to store the computer program or instruction. The communication device according to claim 30 or 31 is characterized in that the communication device also includes a communication interface, and the communication interface is used to input and/or output signals. A computer-readable storage medium, characterized in that a computer program or instruction is stored on the computer-readable storage medium, and when the computer program or the instruction is executed on a computer, so that the method of any one of claims 1 to 15 is performed; or, The method according to any one of claims 16 to 29 is performed. A computer program product, characterized in that it contains instructions, when the instructions are executed on a computer, so that the method of any one of claims 1 to 15 is performed; or, The method according to any one of claims 16 to 29 is performed. A communication system, characterized in that the communication system comprises a first site and a second site, the first site is used to execute the method described in any one of claims 1 to 15, and the second site is used to execute the method described in any one of claims 16 to 29.