WO2021238833A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2021238833A1
WO2021238833A1 PCT/CN2021/095419 CN2021095419W WO2021238833A1 WO 2021238833 A1 WO2021238833 A1 WO 2021238833A1 CN 2021095419 W CN2021095419 W CN 2021095419W WO 2021238833 A1 WO2021238833 A1 WO 2021238833A1
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time
transmission
channel
duration
earlier
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PCT/CN2021/095419
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English (en)
French (fr)
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杨懋
李波
李云波
于健
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0825—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision detection

Definitions

  • This application relates to the field of communication technology, and in particular to a communication method and device.
  • IEEE 802.11 adopts carrier sense multiple access with collision avoidance (CSMA/CA) technology.
  • the carrier sense includes physical carrier sense and virtual carrier sense. Specifically:
  • STA Physical carrier sensing and physical layer reception is busy: When a station (station, STA) detects that the received signal strength indication (RSSI) value on the channel exceeds a certain clear channel assessment (CCA) ) When the threshold is reached, the backoff process needs to be stopped. Further, suppose that STA 1 sends a physical layer protocol data unit (PHY protocol data unit, PPDU) in the 802.11 format, and if any other STA (such as STA 2) parses the PPDU and calculates the transmission duration T of the PPDU , The STA 2 will set the physical layer status to receive busy (RX busy) in the next time period T. In the process of being in the RX Busy state, STA2 is not allowed to perform the backoff process to try to transmit.
  • RX busy receive busy
  • the duration field (Duration) of its media access control (MAC) frame may carry the network allocation vector (NAV) value T, This value represents that STA 1 expects to continue to perform continuous sending or receiving operations in the future time period T after the end of the frame, thereby realizing reservation of channel resources. This period of time is called transmission opportunity (TXOP).
  • TXOP transmission opportunity
  • Any other STA (such as STA 2) parses the 802.11 frame sent by STA 1 and parses out the Duration value T, and STA 2 is not currently set or the set end time is earlier than the end time corresponding to the duration. It is necessary to set NAV in the future time period T, and it is not allowed to perform the backoff process to try transmission during this period of time.
  • the next-generation IEEE 802.11be standard regards guaranteeing delay characteristics as a key technical goal, and has received extensive attention from the industry.
  • the preempt mechanism is an important mechanism. The core idea is to suspend the ongoing transmission and immediately transmit a frame with a low delay requirement to guarantee its delay requirement.
  • This application provides a communication method and device to clarify the transmission process under the preemptive mechanism.
  • the present application provides a communication method.
  • the method may include: a first device suspends a first transmission at a first time, and starts a second transmission at a second time; After the second transmission ends, release the channel, or when the fourth time is earlier than the third time, the first device starts the third transmission at the fifth time; wherein the transmission priority of the second transmission is higher than The priority of the first transmission; the second time is after the first time and is separated from the first time by the first time; the second time is earlier than the third time, and the third time Is the transmission end time when the first transmission is not suspended, or is the end time of the transmission opportunity TXOP restriction; the fifth time is located after the fourth time and is second to the fourth time Duration; the fourth moment is the moment when the second transmission ends.
  • the transmission process under the preemptive mechanism can be clarified, and in the case of preemptive transmission, the fairness between the devices in the communication system can be guaranteed or the efficiency of resource utilization can be guaranteed.
  • the first device releases the channel after the second transmission ends. Specifically, the first device releases the channel after the second transmission ends, when the fourth time is earlier than or When the time is equal to the third time, the first device releases the channel; further, when the fourth time is earlier than the third time, after the first device releases the channel, it arrives at the third time Before, there was no channel competition. This can ensure fairness between devices.
  • the first device releases the channel after the second transmission ends. Specifically, it may also be: the first device releases the channel after the second transmission ends, when the fourth time is early At or equal to the third time, the first device releases the channel; further, when the fourth time is earlier than the third time, after the first device releases the channel, the third Before the time arrives, the channel competition is repeated. In this way, the negative impact caused by the interruption of the transmission of the first device can be compensated.
  • the first device releases the channel after the second transmission ends. Specifically, it may also be: after the second transmission ends, the first device releases the channel when the fourth time is later than At the third moment, the first device releases the channel; further, afterwards, the first device may also perform at least one of the following operations:
  • the first device adjusts the enhanced distributed channel access EDCA parameter within the third time period
  • the starting time of the third time length is the fourth time
  • the third time length is related to the fourth time
  • the third time length is related to the fourth time and the first transmission time.
  • the access type is related.
  • the first device can ensure fairness to other devices by restricting the first device for a period of time when multiple channels are occupied.
  • the first device may perform one of the following operations according to the comparison result between the sixth time when the third transmission ends and the third time: when the sixth time is earlier than At the third moment, the first device releases the channel and does not compete for the channel before the third moment arrives; or, when the sixth moment is later than or equal to the third moment, so The first device releases the channel. This can ensure the efficiency of resource utilization.
  • the first device when the sixth time is later than the third time, the first device does not perform channel contention within the third time period; or, the first device is in the third time period. Adjust the enhanced distributed channel access EDCA parameters within the duration; or, the first device adjusts the maximum transmission duration of each physical layer protocol data unit PPDU sent by the first device within the third duration; or, The first device adjusts the maximum number of aggregated frames of each aggregated media access control management protocol data unit A-MPDU sent by the first device within the third time period; wherein, the start of the third time period The start time is the sixth time, the third time length is related to the sixth time, or the third time length is related to the sixth time and the access type of the first transmission.
  • the first device can ensure fairness to other devices by restricting the first device for a period of time when multiple channels are occupied.
  • the EDCA parameters may include one or more of the following: the size of the contention window CW, the interval between arbitration frames AIFS, and the TXOP duration limit.
  • the The first device may release the channel and perform channel competition again; or, the first device may start the third transmission at the fifth moment. This can ensure the efficiency of resource utilization.
  • the first device may release the channel. In this way, channel resources can be released and fairness between devices can be guaranteed.
  • the first device may also receive a response frame corresponding to the first transmission. In this way, the transmission of the first device can be relatively complete.
  • the first device when the first transmission is configured with a corresponding response frame, and the response frame is an immediate response configuration, the first device may also receive at least one mediator at the end of the first transmission.
  • the incoming control management protocol data unit MPDU carries an instruction to cancel the immediate response. In this way, the opposite end of the first device can make it clear that the response frame of the first transmission may not be triggered temporarily.
  • the present application also provides a communication device, where the communication device may be a first device, and the communication device has the function of implementing the first device in the foregoing first aspect or each possible design example of the first aspect.
  • the functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the first device in the first aspect or each possible design example of the first aspect. For details, refer to the method The detailed description in the example will not be repeated here.
  • the structure of the communication device includes a transceiver, a processor, and optionally a memory.
  • the transceiver is used for sending and receiving data and for communicating and interacting with other devices in the communication system.
  • the processor is configured to support the communication device to perform the aforementioned first aspect or the corresponding function of the first device in each possible design example of the first aspect.
  • the memory is coupled with the processor, and stores program instructions and data necessary for the communication device.
  • an embodiment of the present application provides a communication system, which may include the aforementioned first device and other devices that communicate with the first device.
  • a computer-readable storage medium provided by an embodiment of the present application.
  • the computer-readable storage medium stores program instructions.
  • the program instructions run on a computer, the computer executes the first aspect of the embodiments of the present application and its Any possible design.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer.
  • computer-readable media may include non-transitory computer-readable media, random-access memory (RAM), read-only memory (ROM), and electrically erasable In addition to programmable read-only memory (electrically EPROM, EEPROM), CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can Any other medium accessed by the computer.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable
  • CD-ROM or other optical disk storage magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can Any other medium accessed by the computer.
  • the embodiments of the present application provide a computer program product including computer program code or instructions, which when run on a computer, enables the computer to implement the first aspect and any possible design method in the first aspect .
  • the present application also provides a chip, which is coupled with a memory, and is used to read and execute the program instructions stored in the memory, so as to realize the above-mentioned first aspect and any one of the first aspect.
  • a chip which is coupled with a memory, and is used to read and execute the program instructions stored in the memory, so as to realize the above-mentioned first aspect and any one of the first aspect.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by this application.
  • Figure 2 is a schematic structural diagram of an AP or STA provided by this application.
  • FIG. 3 is a flowchart of a communication method provided by this application.
  • FIG. 4 is a schematic diagram of a transmission process provided by this application.
  • FIG. 5 is a schematic diagram of another transmission process provided by this application.
  • FIG. 6 is a schematic diagram of another transmission process provided by this application.
  • FIG. 7 is a schematic diagram of another transmission process provided by this application.
  • FIG. 8 is a schematic diagram of another transmission process provided by this application.
  • FIG. 9 is a schematic diagram of a transmission process provided by this application.
  • FIG. 10 is a schematic diagram of another transmission process provided by this application.
  • FIG. 11 is a schematic diagram of another transmission process provided by this application.
  • FIG. 12 is a schematic diagram of another transmission process provided by this application.
  • FIG. 13 is a schematic diagram of another transmission process provided by this application.
  • FIG. 14 is a schematic structural diagram of a communication device provided by this application.
  • FIG. 15 is a structural diagram of a communication device provided by this application.
  • the embodiments of the present application provide a communication method and device to clarify the transmission process under the preemption mechanism.
  • the method and device described in the present application are based on the same technical concept. Since the method and the device have similar principles for solving the problem, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • First transmission also known as current transmission (ongoing transmission). Refers to a transmission that was originally ongoing on the channel, but needs to be temporarily suspended and is interrupted by a preemptive transmission.
  • Second transmission also known as preempt transmission. Refers to the transmission that is temporarily performed immediately after the first transmission is suspended, and is often used to carry high-priority services or services with low latency requirements.
  • Third transmission After the second transmission ends, the sender of the original first transmission immediately performs the continued transmission. It can be understood that the third transmission and the services transmitted by the first transmission are the same, of course, they may also be different.
  • the TXOP of a single protection setting is the NAV time length carried in a frame that only protects the time for one transmission or one two-way frame interaction.
  • the TXOP of multiple protection settings is the NAV time length carried in a frame that will protect the time of multiple rounds of transmission or multiple rounds of frame interaction.
  • At least one refers to one or more
  • multiple refers to two or more.
  • And/or describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an “or” relationship.
  • the following at least one (item) or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • At least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c It can be single or multiple.
  • FIG. 1 shows the architecture of a possible communication system to which the communication method provided in the embodiments of the present application is applicable.
  • the architecture of the communication system includes at least one access point (access point, AP) (for example, the AP in FIG. 1) and at least one station (station, STA) (for example, STA1 and STA2 in FIG. 1).
  • access point access point
  • STA station
  • the AP may but not be limited to include communication servers, routers, switches, bridges, etc.
  • the STA may but not be limited to include mobile phones, tablets, computer notebooks, smart watches, smart TVs and many more.
  • the STA may be an AP, such as the router mentioned above, or a non-AP STA, such as the mobile phone mentioned above.
  • an AP or STA may be as shown in the structure diagram shown in FIG. 2, which may include a processor, a memory, a transmitter, a receiver, a signal detector, and a digital signal processor, and optionally may also include User Interface.
  • the transmitter and the receiver may also be combined as a transceiver, which is not limited in this application.
  • the name of the device shown in FIG. 1 is only an example, and there may be other names in the future communication system.
  • the number of devices in FIG. 1 is also only an example, and may include more or less. This application does not limit this equipment.
  • the communication method provided in this application can be applied to data communication between an AP and one or more STAs, can also be applied to data communication between APs and APs, and can also be applied to data communication between STAs and STAs. , This application does not limit this.
  • the following describes the communication method provided by this application in detail to clarify the transmission process of the preemption mechanism, so that the communication system can efficiently support preemptive transmission, and guarantee the fairness of resource competition between STAs (including AP and non-AP STA) , And guarantee the efficiency of resource utilization.
  • a communication method provided by an embodiment of the present application is suitable for the communication system as shown in FIG. 1. As shown in Figure 3, the specific process of the method includes:
  • Step 301 The first device suspends the first transmission at the first time and starts the second transmission at the second time; wherein the transmission priority of the second transmission is higher than the priority of the first transmission;
  • the second time is after the first time and is separated from the first time by the first time length; the second time is earlier than the third time, and the third time is the condition that the first transmission is not suspended
  • the next transmission end time, or the end time of the transmission opportunity TXOP restriction is the transmission end time when the first transmission is not suspended is the original planned end time when the first transmission is not suspended, and can also be directly referred to as the original planned end of the first transmission time.
  • the first device may be an AP or STA in the communication system shown in FIG. 1.
  • the first duration may be a certain inter-frame space (xIFS), for example, it may be a short inter-frame space (SIFS).
  • xIFS inter-frame space
  • SIFS short inter-frame space
  • Step 302 After the second transmission ends, the first device may perform the following operations a1 or a2:
  • Operation a1 the first device releases the channel
  • Operation a2 When the fourth time is earlier than the third time, the first device starts the third transmission at the fifth time, where the fifth time is located after the fourth time and is in line with the
  • the fourth time interval is a second time length; the fourth time is the time when the second transmission ends; for example, the second time length may be xIFS, for example, may be SIFS.
  • the first device performs the foregoing operation a1 only when the fourth time is earlier than or equal to the third time. In another optional implementation manner, the first device performs the foregoing operation a1 only when the fourth time is later than the third time.
  • the fourth time when the fourth time is earlier than the third time, after the first device releases the channel, that is, after the first device performs the above operation a1, the third Before the time arrives, there is no channel competition. This can ensure fairness between STAs.
  • the fourth time when the fourth time is earlier than the third time, after the first device releases the channel, that is, after the first device performs the above operation a1, the first device Before the third moment arrives, channel competition may be performed again. In this way, the negative impact caused by the interruption of the transmission of the first device can be compensated.
  • the first device may also perform the following operations according to the comparison result between the sixth time when the third transmission ends and the third time One of:
  • the first transmission is configured with a corresponding response frame, and when the fourth time is later than the third time and earlier than the preset end time of the response frame, The first device releases the channel and performs channel competition again; or the first device starts to perform the third transmission at the fifth moment. Further, when the sixth time when the third transmission ends is later than the preset end time of the response frame, the first device releases the channel.
  • the first device may perform the following operations One of:
  • the first device does not perform channel competition within the third time period; wherein, in the case that the fourth time is later than the third time, the start time of the third time period is the first time At time four, the third time length is related to the fourth time, or the third time length is related to the fourth time and the access category (AC) of the first transmission; or, at any time In the case where the sixth time is later than the third time, the start time of the third time length is the sixth time, the third time length is related to the sixth time, or the third time length Related to the sixth moment and the access type of the first transmission;
  • the third duration ⁇ T may conform to the following formula 1 or formula 2:
  • f 2 is a function, indicating that the value of ⁇ T is related to the value of t 2 -t 1 and the access type AC of the first transmission.
  • the first device adjusts enhanced distributed channel access (Enhanced Distributed Channel Access, EDCA) parameters within the third time period; for example, the EDCA parameters may include, but are not limited to, one or more of the following : Contention Window (CW) size, Arbitration Interframe Space (AIFS), TXOP time limit (TXOP limit); specifically, the first device to adjust the EDCA parameters can be to increase CW, Increase AIFS or decrease TXOP limit, etc.
  • CW Contention Window
  • AIFS Arbitration Interframe Space
  • TXOP limit TXOP time limit
  • the first device to adjust the EDCA parameters can be to increase CW, Increase AIFS or decrease TXOP limit, etc.
  • the first device adjusts the maximum transmission duration of each physical layer protocol data unit (PHY Protocol Data Unit, PPDU) sent by the first device within the third duration; for example, the first device may Reduce the maximum transmission duration of each PPDU;
  • PHY Protocol Data Unit PHY Protocol Data Unit
  • the first device adjusts the maximum aggregation of each aggregated medium access control management protocol data unit (Aggregated Medium access control Protocol Data Unit, A-MPDU) sent by the first device within the third time period
  • A-MPDU aggregated Medium access control Protocol Data Unit
  • the number of frames for example, the first device can reduce the maximum number of aggregated frames for each A-MPDU.
  • the first transmission when the first transmission is configured with a corresponding response frame, after the first device suspends the first transmission and before the second transmission, the first device The response frame corresponding to the first transmission is received first.
  • the first device when the first transmission is configured with a corresponding response frame, and the response frame is an immediate response configuration, the first device performs at least one MPDU in the last of the first transmission It carries an instruction to cancel the immediate response, so that the second transmission can be performed directly after the first transmission is suspended.
  • the MPDU has an IEEE 802.11 frame structure
  • the first device can modify the 00 in the ACK Policy field in the Quality of Service Control (QoS Control) field in the frame structure to 11.
  • QoS Control Quality of Service Control
  • the first device is an STA (including AP and non-AP STA) as an example for description.
  • the TXOP preemption mechanism is set for single protection, and it is suitable for the following scenarios: the TXOP duration (Duration) in the Medium Access Control (MAC) frame in the first transmission is set to 0 or The TXOP field in the High Efficient Signal Field A (HE SIG-A) of the first transmission is set to unspecified (UNSPECIFIED).
  • the transmission process in this example one may be:
  • Step d1 A certain STA (that is, the first device) successfully competes for the channel and initiates the first transmission. Set the original planned end time of the first transmission (that is, the above-mentioned third time) as Then the STA performs step d2.
  • Step d2 The STA is The first transmission is suspended at the time (that is, the aforementioned first time), and the second transmission is initiated immediately after waiting for the xIFS (such as SIFS) duration (that is, the aforementioned first duration) after the first transmission is suspended.
  • xIFS such as SIFS
  • Fig. 4 means that the second transmission only includes one frame
  • Figs. 5 and 6 mean that the second transmission may include multiple frames, and specifically may include interactive frames, such as the data frame and acknowledgement in Fig. 5
  • the frame is another example of the trigger frame, uplink transmission and confirmation frame in FIG. 6; it should be noted that the STA in FIG. 6 may be an AP, and the AP sends a trigger frame (Trigger Frame, TF) to schedule the uplink transmission process.
  • Trigger Frame Trigger Frame
  • the transmission end time of any frame in the second transmission in step d2 and the end time set by NAV for each frame of the second transmission are both equal to or earlier than the original plan of the first transmission End time
  • the STA After the second transmission ends, the STA performs step d3.
  • Step d3 If the end time of the second transmission (that is, the fourth time) has not reached the original planned end time of the first transmission
  • the STA can perform one of the following options:
  • Option (1) The STA releases the channel and guarantees that it is not allowed to compete for the channel before the original planned end time of the first transmission. At this point, the process ends, as shown in Figure 7. It should be noted that in this option (1), the device performing the first transmission and the second transmission with the STA also needs to release the channel, and it is ensured that no channel contention is allowed before the original planned end time of the first transmission.
  • Option (2) The STA decides to initiate the third transmission and executes step d4, as shown in FIG. 4 to FIG. 6.
  • Step d4 The STA immediately initiates the third transmission after the second transmission ends and after waiting for xIFS (such as SIFS) (that is, at the above fifth moment).
  • xIFS such as SIFS
  • the end time of the third transmission (that is, the aforementioned sixth time) is equal to or earlier than the originally planned end time of the first transmission. Then the STA executes step d5.
  • Step d5 If after the third transmission ends, the original planned end time of the first transmission has not been reached Then the STA needs to release the channel and ensure that it is not allowed to compete for the channel before the original planned end time of the first transmission. At this point, the process ends. It should be noted that in this case, the device performing the third transmission with the STA is also not allowed to compete for the channel before the original planned end time of the first transmission.
  • this example is applicable to the same scenario as the first example above.
  • the transmission process of this example two is generally the same as that of the above example one, but the difference is that in this example two, the end time of the third transmission is allowed to be later than the original planned end time of the first transmission.
  • the transmission process of the second example may be:
  • Step e1 A certain STA (that is, the first device) successfully competes for the channel and initiates the first transmission. Set the original planned end time of the first transmission (that is, the above-mentioned third time) as Then the STA executes step e2.
  • Step e2 The STA is The first transmission is suspended at the time (that is, the aforementioned first time), and the second transmission is initiated immediately after waiting for the xIFS (such as SIFS) duration (that is, the aforementioned first duration) after the first transmission is suspended.
  • xIFS such as SIFS
  • the difference from the first example of step d2 is that the transmission end time of the second transmission in step e2 and the end time of the NAV setting of each frame of the second transmission are not limited to be equal to or earlier than the first The original planned end time of a transmission That can be later than
  • the STA executes step e3.
  • Step e3 If the end time of the second transmission has reached or exceeded the original planned end time of the first transmission Then the process ends. Conversely, if the end time of the second transmission does not reach the original planned end time of the first transmission Then the STA can perform one of the following options:
  • Option (1) The STA releases the channel and guarantees that it is not allowed to compete for the channel before the original planned end time of the first transmission. At this point, the process ends. It should be noted that in this option (1), the device performing the first transmission and the second transmission with the STA also needs to release the channel, and it is ensured that no channel contention is allowed before the original planned end time of the first transmission.
  • Option (2) The STA decides to initiate the third transmission, and step e4 is executed.
  • Step e4 The STA immediately initiates the third transmission after the second transmission ends and waiting for xIFS (such as SIFS) (that is, at the above fifth moment).
  • xIFS such as SIFS
  • the end time of the third transmission in the second example may exceed the originally planned end time of the first transmission, so that the remaining information of the interrupted first transmission is completely transmitted. Then, the STA executes step e5.
  • Step e5 End time of the third transmission (That is, the sixth moment above) if the original planned end time of the first transmission is exceeded Then the process ends after the STA performs one of the following options:
  • Option (1) The STA releases the channel, as shown in FIG. 8.
  • Option (2) The STA releases the channel, and does not allow (that is, prohibits) the STA to compete for the channel within a ⁇ T time (that is, the foregoing third time period), as shown in FIG. 9.
  • the value of ⁇ T can be determined by the above formula 1 or formula 2, where, in the above formula 1 or formula 2, t 2 is t 1 is
  • Option (3) The STA releases the channel, and the STA adjusts the EDCA parameter within the ⁇ T time. For example, increase CW, increase AIFS, or decrease TXOP limit.
  • Option (4) release the channel, and the STA adjusts the maximum transmission duration of each PPDU within ⁇ T, for example, reduces the maximum transmission duration of each PPDU.
  • Option (5) release the channel, and the STA adjusts the maximum number of aggregated frames for each A-MPDU within ⁇ T, for example, reduces the maximum number of aggregated frames for each A-MPDU.
  • This example 3 is aimed at the preemption mechanism of TXOP with multiple protection settings. Specifically, the transmission process of this example 3 can be:
  • Step f1 In a TXOP with multiple protection settings (this TXOP is called the original TXOP in this example), a certain STA is performing the first transmission, and set the end time of the TXOP limit of the original TXOP (that is, the third time mentioned above) for Then, the STA performs step f2.
  • Step f2 The STA is The first transmission is suspended at the time (that is, the aforementioned first time), and the second transmission is initiated immediately after waiting for the xIFS (such as SIFS) duration (that is, the aforementioned first duration) after the first transmission is suspended.
  • the xIFS such as SIFS
  • the expected and actual end time of the second transmission does not need to be limited by the end time of the TXOP limit.
  • the STA executes step f3 after the second transmission ends.
  • Step f3 Set the end time of the second transmission (that is, the fourth time mentioned above) as If the end time of the second transmission has not exceeded which is Then the STA (the original TXOP holder (TXOP holder)) can continue to use the original TXOP, and the process ends. If the end time of the second transmission has exceeded which is Then the STA can perform one of the following options and then the process ends:
  • Option (1) The STA releases the channel.
  • Option (2) The STA releases the channel and does not allow the STA to compete for the channel within a ⁇ T time (that is, the aforementioned third time period), as shown in FIG. 10.
  • the value of ⁇ T can be determined by the above formula 1 or formula 2, where, in the above formula 1 or formula 2, t 2 is t 1 is
  • Selection (3) to selection (5) are the same as selection (3) to selection (5) in step e5 in the above example two, and can refer to each other, and will not be described in detail here.
  • the above example three can be implemented in the preemptive mechanism of setting the TXOP with multiple protections, so that in order to guarantee low-latency services, there is no need to be restricted by the TXOP limit.
  • This example four is aimed at the preemption mechanism in the case where the first transmission has a response, that is, the first transmission is configured with a corresponding response frame.
  • This example four sets TXOP for single protection and is applicable to the following scenarios: the TXOP duration (Duration) in the MAC frame in the first transmission is set to 0 or the high-efficiency signal domain A (HE SIG-A) of the first transmission is set The TXOP field in is set to unspecified (UNSPECIFIED).
  • This example four is similar to example one. The difference is that when the STA is performing the second transmission and the third transmission, it is clearly known that the frame originally planned to be sent by the first transmission has a response frame, and there is a difference in the calculation of the latest end time of the second transmission.
  • the transmission process of Example 4 may be:
  • Step g1 A certain STA (that is, the first device) successfully competes for the channel and initiates the first transmission.
  • Set the original planned end time of the first transmission that is, the above-mentioned third time
  • the first transmission originally planned to have a corresponding response frame the interval between the response frame and the original planned end time of the first transmission is set to yIFS, and it is assumed that the transmission duration of the response frame is Then the STA executes step g2.
  • Step g2 The STA is The first transmission is suspended at the time (that is, the aforementioned first time), and the second transmission is initiated immediately after waiting for the xIFS (such as SIFS) duration (that is, the aforementioned first duration) after the first transmission is suspended.
  • the transmission end time of any frame in the second transmission in step g2 and the end time set by NAV for each frame of the second transmission are equal to or earlier than
  • step g3 After the second transmission ends, the STA executes step g3.
  • Step g3 In one case, when the end time of the second transmission has not reached or exceeded the original planned end time of the first transmission Then the STA can perform one of the following options:
  • Option (1) The STA releases the channel and guarantees that at the original planned end time of the first transmission Prior to this, it was not allowed to compete for channels. At this point, the process ends. It should be noted that in this option (1), the device performing the first transmission and the second transmission with the STA also needs to release the channel, and it is ensured that no channel contention is allowed before the original planned end time of the first transmission.
  • Option (2) The STA decides to initiate the third transmission, and then executes step g4. Among them, when the transmission end time of the third transmission does not exceed the original planned end time of the first transmission
  • the subsequent process is the same as step d5 in the above example 1, and can refer to the content of step d5 in the above example 1, which will not be described in detail here.
  • the STA (and the device that performs the first transmission and the second transmission with the STA) can perform one of the following options:
  • Option (1) The STAs release channels and can compete for the channel again. At this point, the process ends.
  • Option (2) The STA decides to initiate the third transmission, and then executes step g4.
  • Step g4 the end moment of the end of the third transmission If it exceeds Then the STA executes one of the choices (1)-(5) involved in step e5 in the second example above.
  • the confirmation can be performed immediately after the first transmission is interrupted, and then the second transmission can be entered, as shown in FIG. 12.
  • the transmission process is performed after the above step g1: the STA is The first transmission is suspended at any moment, and the second transmission is initiated immediately after waiting for xIFS (such as SIFS) after the response frame transmission of the first transmission is received.
  • xIFS such as SIFS
  • the original first transmitted frame requires the opposite end to immediately reply with an acknowledgement frame (Acknowledgement) or block acknowledgement frame (Block ACK, BA),
  • the second transmission needs to be temporarily transmitted, it can be indicated in the last or the last several MPDUs of the first transmission to cancel the implicit immediate confirmation rule (the ACK Policy field in the QoS Control field in the IEEE 802.11 frame structure is set to 00)
  • Change to block acknowledgment explicit response the ACK Policy field in the QoS Control field in the IEEE 802.11 frame structure is set to 11).
  • the other processes after the end of the first transmission are the same as the steps d2-d5 in the above example one or the same as the steps e2-e5 in the above example two, which can be referred to each other and will not be described in detail here.
  • the second transmission and the third transmission can be adapted to the response mechanism, and the transmission is more flexible.
  • Example 5 it is a preemption mechanism that never allows the third transmission and cannot compete for the channel again.
  • the fifth example is the same as the solution corresponding to FIG. 7 in the first example.
  • the transmission process of Example 5 may be:
  • Step h1-step h2 are the same as step d1-step d2 in the foregoing example 1, and can refer to each other, and will not be described in detail here.
  • Step h3 If the end time of the second transmission (that is, the fourth time) has not reached the original planned end time of the first transmission Then the STA releases the channel and is not allowed to compete for the channel before the original planned end time of the first transmission. Then the process ends.
  • TXOP in the MAC frame in the first transmission The duration (Duration) is set to 0 or the TXOP field in the high efficiency signal field A (HE SIG-A) of the first transmission is set to not specified (UNSPECIFIED).
  • the transmission process of Example 6 may be:
  • Step i1-step i2 are the same as step d1-step d2 in the foregoing example 1, and can refer to each other, and will not be described in detail here.
  • Step i3 If the end time of the second transmission (that is, the fourth time) has not reached the original planned end time of the first transmission Then the STA releases the channel.
  • the difference from Example 5 is that after the STA releases the channel, the STA always allows the existing IEEE 802.11 channel contention mechanism to re-contend for the channel before the original planned end time of the first transmission.
  • the receiver of the first transmission and the device performing the second transmission with the STA may or may not be allowed to use the existing IEEE 802.11 channel contention mechanism to re-contend for the channel before the original planned end time of the first transmission. Then the process ends.
  • the preemption mechanism that allows the channel to be released after the second transmission ends and re-competes for the channel can enable the participants of the interrupted transmission to still compete for the channel again, which compensates for the negative effects caused by the interruption of the transmission. Influence.
  • the embodiment of the present application also provides a communication device.
  • the communication device 1400 may include a processing unit 1401 and a transceiver unit 1402.
  • the transceiving unit 1402 is used for the communication device 1400 to perform communication transmission, for example, receiving information (frame, message or data) or sending information (frame, message or data), and the processing unit 1401 is used to The operation of the communication device 1400 is controlled and managed.
  • the processing unit 1401 may also control the steps performed by the transceiver unit 1402.
  • the communication apparatus 1400 may be the first device in the foregoing embodiment, and specifically may be a processor, or a chip or a chip system, or a functional module in the first device.
  • the communication device 1400 when used to implement the function of the first device in the embodiment shown in FIG. 3, it may specifically include:
  • the processing unit 1401 is configured to control the transceiver unit 1402 to suspend the first transmission at the first moment and start the second transmission at the second moment; wherein the transmission priority of the second transmission is higher than that of the first transmission.
  • Priority of transmission; the second time is located after the first time and is separated from the first time by the first time; the second time is earlier than the third time, and the third time is the first time A transmission end time when the transmission is not suspended, or the end time of the transmission opportunity TXOP restriction;
  • the processing unit 1401 is further configured to release the channel after the second transmission of the transceiver unit 1402 ends; or, at After the second transmission of the transceiving unit 1402 ends, when the fourth time is earlier than the third time, the transceiving unit 1402 is controlled to start the third transmission at the fifth time, where the fifth time is located at the fifth time.
  • the fourth time is the time when the second transmission ends.
  • the processing unit 1401 when the processing unit 1401 releases the channel after the second transmission of the transceiving unit 1402 ends, it is specifically configured to: after the second transmission of the transceiving unit 1402 ends, when the When the fourth time is earlier than or equal to the third time, the channel is released; when the fourth time is earlier than the third time, the processing unit 1401 is further configured to: after releasing the channel: Before the third moment arrives, no channel contention or channel contention is performed again.
  • the processing unit 1401 when the processing unit 1401 releases the channel after the second transmission of the transceiving unit 1402 ends, it is specifically configured to: after the second transmission of the transceiving unit 1402 ends, when the fourth time is later than all At the third time, the channel is released; further, the processing unit 1401 is further configured to: do not perform channel competition within the third time period; wherein, the start time of the third time period is the fourth time , The third duration is related to the fourth time, or the third duration is related to the fourth time and the access type of the first transmission; or, the enhancement distribution is adjusted within the third time Channel access EDCA parameters; or, within the third time period, adjust the maximum transmission duration of each physical layer protocol data unit PPDU sent by the first device; or, within the third time period, adjust the first The maximum number of aggregated frames for each aggregated media access control management protocol data unit A-MPDU sent by a device.
  • the processing unit 1401 is further configured to: perform one of the following operations according to the comparison result between the sixth time when the third transmission of the transceiver unit 1402 ends and the third time Item: When the sixth time is earlier than the third time, release the channel, and before the third time arrives, no channel contention; when the sixth time is later than or equal to the third time When the channel is released.
  • the processing unit 1401 is further configured to: within the third time period, no channel contention is performed; the start time of the third time period is all At the sixth moment, the third duration is related to the sixth moment, or the third duration is related to the sixth moment and the access type of the first transmission; or, at the third duration Internally adjust the enhanced distributed channel access EDCA parameters; or, adjust the maximum transmission duration of each physical layer protocol data unit PPDU sent by the first device within the third duration; or, within the third duration Adjust the maximum number of aggregated frames of each aggregated media access control management protocol data unit A-MPDU sent by the first device.
  • the EDCA parameters may include one or more of the following: the size of the contention window CW, the interval between arbitration frames AIFS, and the TXOP duration limit.
  • the processing unit 1401 is further configured to: the first transmission configuration of the transceiver unit 1402 is configured with a corresponding response frame, and when the fourth time is later than the third time And when it is earlier than the preset end time of the response frame, the channel is released and the channel contention is repeated; or, when the fourth time is later than the third time and earlier than the preset end time of the response frame , Controlling the transceiver unit 1402 to start the third transmission at the fifth moment.
  • the processing unit 1401 is further configured to release the channel when the sixth time when the third transmission of the transceiver unit 1402 ends is later than the preset end time of the response frame.
  • the processing unit 1401 is further configured to: after controlling the transceiving unit 1402 to suspend the first transmission, before performing the second transmission, control the transceiving unit 1402 to receive the The response frame corresponding to the first transmission.
  • the processing unit 1401 is further configured to: The last at least one medium access control management protocol data unit MPDU of the first transmission of the transceiver unit 1402 carries an instruction to cancel the immediate response.
  • the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • the functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit 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.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .
  • an embodiment of the present application also provides a communication device.
  • the communication device 1500 may include a transceiver 1501 and a processor 1502.
  • the communication device 1500 may further include a memory 1503.
  • the memory 1503 may be provided inside the communication device 1500, and may also be provided outside the communication device 1500.
  • the processor 1502 can control the transceiver 1501 to receive and send data.
  • the processor 1502 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
  • the processor 1502 may further include a hardware chip.
  • the aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof.
  • ASIC application-specific integrated circuit
  • PLD programmable logic device
  • the above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (generic array logic, GAL), or any combination thereof.
  • the transceiver 1501, the processor 1502, and the memory 1503 are connected to each other.
  • the transceiver 1501, the processor 1502, and the memory 1503 are connected to each other through a bus 1504;
  • the bus 1504 may be a Peripheral Component Interconnect (PCI) bus or an extended industry standard Structure (Extended Industry Standard Architecture, EISA) bus, etc.
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used in FIG. 15 to represent it, but it does not mean that there is only one bus or one type of bus.
  • the memory 1503 is used to store programs and the like.
  • the program may include program code, and the program code includes computer operation instructions.
  • the memory 1503 may include RAM, or may also include non-volatile memory, such as one or more disk memories.
  • the processor 1502 executes the application program stored in the memory 1503 to realize the above-mentioned functions, thereby realizing the function of the communication device 1500.
  • the communication apparatus 1500 may be the foregoing first device.
  • the communication apparatus 1500 When the communication apparatus 1500 is used to implement the function of the first device in the embodiment shown in FIG. 3, it may specifically include:
  • the transceiver 1501 is used for communication transmission; the processor 1502 is used for controlling the transceiver 1501 to suspend the first transmission at the first time and start the second transmission at the second time; wherein, the second transmission is The transmission priority of the transmission is higher than the priority of the first transmission; the second time is after the first time and is separated from the first time by the first time period; the second time is earlier than the third time Time, the third time is the transmission end time when the first transmission is not suspended, or the end time of the transmission opportunity TXOP restriction; the processor 1502 is also configured to perform the first transmission of the transceiver 1501 After the second transmission ends, release the channel; or, after the second transmission of the transceiver 1501 ends, when the fourth time is earlier than the third time, control the transceiver 1501 to start the third time at the fifth time. Transmission, wherein the fifth time is after the fourth time and is separated from the fourth time by a second length of time; the fourth time is the time when the second transmission ends.
  • the processor 1502 when the processor 1502 releases the channel after the second transmission of the transceiver 1501 ends, it is specifically configured to: after the second transmission of the transceiver 1501 ends, when the When the fourth time is earlier than or equal to the third time, the channel is released; when the fourth time is earlier than the third time, after releasing the channel, the processor 1502 is further configured to: Before the third moment arrives, no channel contention or channel contention is performed again.
  • the processor 1502 when the processor 1502 releases the channel after the second transmission of the transceiver 1501 ends, it is specifically configured to: after the second transmission of the transceiver 1501 ends, when the fourth time is later than all At the third time, the channel is released; further, the processor 1502 is further configured to: do not perform channel competition within the third time period; wherein the start time of the third time period is the fourth time , The third duration is related to the fourth time, or the third duration is related to the fourth time and the access type of the first transmission; or, the enhancement distribution is adjusted within the third time Channel access EDCA parameters; or, within the third time period, adjust the maximum transmission duration of each physical layer protocol data unit PPDU sent by the first device; or, within the third time period, adjust the first The maximum number of aggregated frames for each aggregated media access control management protocol data unit A-MPDU sent by a device.
  • the processor 1502 is further configured to: perform one of the following operations according to the comparison result between the sixth time when the third transmission of the transceiver 1501 ends and the third time Item: When the sixth time of the transceiver 1501 is earlier than the third time, the channel is released, and no channel contention is performed before the third time arrives; when the sixth time is later than or equal to all At the third moment, the channel is released.
  • the processor 1502 is further configured to: within the third time period, no channel contention is performed; the start time of the third time period is all At the sixth moment, the third duration is related to the sixth moment, or the third duration is related to the sixth moment and the access type of the first transmission; or, at the third duration Internally adjust the enhanced distributed channel access EDCA parameters; or, adjust the maximum transmission duration of each physical layer protocol data unit PPDU sent by the first device within the third duration; or, within the third duration Adjust the maximum number of aggregated frames of each aggregated media access control management protocol data unit A-MPDU sent by the first device.
  • the EDCA parameters may include one or more of the following: the size of the contention window CW, the interval between arbitration frames AIFS, and the TXOP duration limit.
  • the processor 1502 is further configured to: the first transmission configuration of the transceiver 1501 is configured with a corresponding response frame, and when the fourth time is later than the third time and When the response frame is earlier than the preset end time, the channel is released and the channel contention is restarted; or, when the fourth time is later than the third time and earlier than the preset end time of the response frame, Control the transceiver 1501 to start the third transmission at the fifth moment.
  • the processor 1502 is further configured to release the channel when the sixth time when the third transmission of the transceiver 1501 ends is later than the preset end time of the response frame.
  • the processor 1502 is further configured to: after controlling the transceiver 1501 to suspend the first transmission, before performing the second transmission, control the transceiver 1501 to receive the The response frame corresponding to the first transmission.
  • the processor 1502 is further configured to: The last at least one medium access control management protocol data unit MPDU of the first transmission of the transceiver 1501 carries an instruction to cancel the immediate response.
  • the embodiments of the present application provide a communication system, and the communication system may include the STA and AP involved in the above embodiments.
  • the embodiments of the present application also provide a computer-readable storage medium, which is used to store a computer program or instruction.
  • the computer program or instruction When the computer program or instruction is executed by a computer, the computer can implement the method provided in the foregoing method embodiment. Communication method.
  • the embodiments of the present application also provide a computer program product, the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer can implement the communication method provided in the foregoing method embodiment.
  • An embodiment of the present application also provides a chip, which is coupled with a memory, and the chip is configured to implement the communication method provided in the foregoing method embodiment.
  • this application can be provided as a method, a system, or a computer program product. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • a computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

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Abstract

一种通信方法及装置，用以明确占先机制下的传输过程。该方法包括：第一设备在第一时刻中止第一传输，在第二时刻开始进行第二传输；第二传输的传输优先级高于第一传输的优先级；第二时刻位于第一时刻之后且与第一时刻间隔第一时长；第二时刻早于第三时刻，第三时刻为第一传输未被中止的情况下的传输结束时刻，或者为TXOP限制的结束时刻；第一设备在第二传输结束后，释放信道；或者当第四时刻早于第三时刻时，第一设备在第五时刻开始进行第三传输，第五时刻位于第四时刻之后且与第四时刻间隔第二时长；第四时刻为第二传输结束的时刻。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2020年05月28日提交中国专利局、申请号为202010469484.X、申请名称为“一种通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
IEEE 802.11采用具有冲突避免的载波侦听多址接入(carrier sense multiple access with collision avoidance，CSMA/CA)技术，其中的载波侦听包括物理载波侦听和虚拟载波侦听两部分，具体的：
1)物理载波侦听与物理层接收繁忙：当一个站点(station，STA)侦听到信道上的接收信号强度(received signal strength indication，RSSI)值超过某一个空闲信道评估(clear channel assessment，CCA)门限值时，需要停止退避过程。进一步的，假设STA 1发出802.11格式的物理层协议数据单元(PHY protocol data unit，PPDU)后，而如果任何一个其他STA(例如STA 2)从该PPDU中解析并计算出该PPDU的传输时长T，则STA 2将在接下来的时长T内设置物理层状态为接收繁忙(RX busy)。在处于RX Busy状态的过程中，STA2不允许执行退避过程尝试传输。
2)虚拟载波侦听：假设STA 1发出一个802.11帧，其媒介接入控制(media access control，MAC)帧的时长域(Duration)可能会携带网络分配矢量(network allocation vector，NAV)值T，该值代表STA 1预期在该帧结束后的未来时长T内持续执行连续的发送或接收操作，从而实现对信道资源进行预约，这段时间被称为传输机会(transmission opportunity，TXOP)。其他任何一个STA(例如STA 2)解析出STA 1发出的802.11帧并解析出来其中的Duration取值T，且STA 2当前NAV没有被设置或者被设置的结束时间早于时长所对应的结束时间，则需要在未来时长T内设置NAV，不允许在这段时间内执行退避过程尝试传输。
下一代IEEE 802.11be标准将保障时延特性作为一项关键的技术目标，得到了业界的广泛重视。目前存在多种时延保障解决方案，其中占先机制(preempt)是一个重要的机制，核心思想是中止正在进行的传输并且临时立即传输一个低延时要求的帧以保障其延时需求。但是，在目前的标准中还没有对占先机制明确的规定。
发明内容
本申请提供一种通信方法及装置，用以明确占先机制下的传输过程。
第一方面，本申请提供了一种通信方法，该方法可以包括：第一设备在第一时刻中止第一传输，并在第二时刻开始进行第二传输；所述第一设备在所述第二传输结束后，释放信道，或者当第四时刻早于所述第三时刻时，所述第一设备在第五时刻开始进行第三传输； 其中，所述第二传输的传输优先级高于所述第一传输的优先级；所述第二时刻位于所述第一时刻之后、且与所述第一时刻间隔第一时长；所述第二时刻早于第三时刻，所述第三时刻为所述第一传输未被中止的情况下的传输结束时刻，或者为传输机会TXOP限制的结束时刻；所述第五时刻位于所述第四时刻之后，且与所述第四时刻间隔第二时长；所述第四时刻为所述第二传输结束的时刻。
通过上述方法，可以明确占先机制下的传输过程，并在存在占先传输的情况下，可以保证通信系统中各设备之间的公平性或者可以保障资源利用的高效性。
在一个可能的设计中，所述第一设备在所述第二传输结束后释放信道，具体可以为：所述第一设备在所述第二传输结束后，当所述第四时刻早于或者等于所述第三时刻时，所述第一设备释放信道；进一步地，当所述第四时刻早于所述第三时刻时，所述第一设备释放信道后，在所述第三时刻到达之前，不进行信道竞争。这样可以保障设备之间的公平性。
在一个可能的设计中，所述第一设备在所述第二传输结束后，释放信道，具体还可以为：所述第一设备在所述第二传输结束后，当所述第四时刻早于或者等于所述第三时刻时，所述第一设备释放信道；进一步地，当所述第四时刻早于所述第三时刻时，所述第一设备释放信道后，在所述第三时刻到达之前，重新进行信道竞争。这样可以补偿所述第一设备的传输被打断所带来的负面影响。
在一个可能的设计中，所述第一设备在所述第二传输结束后释放信道，具体也可以为：所述第一设备在所述第二传输结束后，当所述第四时刻晚于所述第三时刻时，所述第一设备释放信道；进一步地，之后所述第一设备还可以执行如下操作中的至少一个：
在第三时长内，不进行信道竞争；或者
所述第一设备在所述第三时长内调整增强分布式信道接入EDCA参数；或者
所述第一设备在所述第三时长内调整所述第一设备发送的每一个物理层协议数据单元PPDU的最大传输时长；或者
所述第一设备在所述第三时长内调整所述第一设备发送的每一个聚合的媒介接入控制管理协议数据单元A-MPDU的最大聚合帧个数；
其中，所述第三时长的起始时刻为所述第四时刻，所述第三时长与所述第四时刻有关，或者所述第三时长与所述第四时刻和所述第一传输的接入类型相关。
通过上述方法，所述第一设备可以在多占用信道的情况下，通过对所述第一设备进行一段时长的限制，来保障对其他设备的公平。
在一个可能的设计中，所述第一设备根据所述第三传输结束的第六时刻与所述第三时刻的对比结果，可以执行如下操作中的一项：当所述第六时刻早于所述第三时刻时，所述第一设备释放信道，并在所述第三时刻到达之前，不进行信道竞争；或者，当所述第六时刻晚于或等于所述第三时刻时，所述第一设备释放信道。这样可以保障资源利用的高效性。
在一个可能的设计中，当所述第六时刻晚于所述第三时刻时，所述第一设备在第三时长内，不进行信道竞争；或者，所述第一设备在所述第三时长内调整增强分布式信道接入EDCA参数；或者，所述第一设备在所述第三时长内调整所述第一设备发送的每一个物理层协议数据单元PPDU的最大传输时长；或者，所述第一设备在所述第三时长内调整所述第一设备发送的每一个聚合的媒介接入控制管理协议数据单元A-MPDU的最大聚合帧个数；其中，所述第三时长的起始时刻为所述第六时刻，所述第三时长与所述第六时刻有关，或者所述第三时长与所述第六时刻和所述第一传输的接入类型相关。
通过上述方法，所述第一设备可以在多占用信道的情况下，通过对所述第一设备进行一段时长的限制，来保障对其他设备的公平。
在一个可能的设计中，所述EDCA参数可以包括以下一项或多项：竞争窗CW大小、仲裁帧间间隔AIFS、TXOP时长限制。
在一个可能的设计中，当所述第一传输配置有对应的应答帧，且当所述第四时刻晚于所述第三时刻且早于所述应答帧的预设结束时刻时，所述第一设备可以释放信道并重新进行信道竞争；或者，所述第一设备可以在所述第五时刻开始进行第三传输。这样可以保障资源利用的高效性。
在一个可能的设计中，当所述第三传输结束的第六时刻晚于所述应答帧的预设结束时刻时，所述第一设备可以释放信道。这样可以释放信道资源，保障个设备之间的公平性。
在一个可能的设计中，所述第一设备在中止所述第一传输之后，在进行第二传输之前，所述第一设备还可以接收所述第一传输对应的应答帧。这样可以使所述第一设备的传输相对完整。
在一个可能的设计中，当所述第一传输配置有对应的应答帧，且所述应答帧为立即应答配置时，所述第一设备还可以在所述第一传输的最后至少一个媒介接入控制管理协议数据单元MPDU中携带取消立即应答的指示。这样可以使得所述第一设备的对端明确所述第一传输的应答帧可以暂时不触发。
第二方面，本申请还提供了一种通信装置，所述通信装置可以是第一设备，该通信装置具有实现上述第一方面或第一方面的各个可能的设计示例中第一设备的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，所述通信装置的结构中包括收发单元和处理单元，这些单元可以执行上述第一方面或第一方面的各个可能的设计示例中第一设备的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
在一个可能的设计中，所述通信装置的结构中包括收发器和处理器，可选的还包括存储器，所述收发器用于收发数据，以及用于与通信系统中的其他设备进行通信交互，所述处理器被配置为支持所述通信装置执行上述第一方面或第一方面的各个可能的设计示例中第一设备的相应的功能。所述存储器与所述处理器耦合，其保存所述通信装置必要的程序指令和数据。
第三方面，本申请实施例提供了一种通信系统，可以包括上述提及的第一设备以及与所述第一设备通信的其他设备等。
第四方面，本申请实施例提供的一种计算机可读存储介质，该计算机可读存储介质存储有程序指令，当程序指令在计算机上运行时，使得计算机执行本申请实施例第一方面及其任一可能的设计。示例性的，计算机可读存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括非瞬态计算机可读介质、随机存取存储器(random-access memory，RAM)、只读存储器(read-only memory，ROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。
第五方面，本申请实施例提供一种包括计算机程序代码或指令的计算机程序产品，当 其在计算机上运行时，使得计算机实现上述第一方面及其第一方面中任一可能的设计的方法。
第六方面，本申请还提供了一种芯片，所述芯片与存储器耦合，用于读取并执行所述存储器中存储的程序指令，以实现上述第一方面及其第一方面中任一可能的设计的方法。
上述第二方面至第六方面中的各个方面以及各个方面可能达到的技术效果请参照上述针对第一方面中的各种可能方案可以达到的技术效果说明，这里不再重复赘述。
附图说明
图1为本申请提供的一种通信系统的架构示意图；
图2为本申请提供的一种AP或者STA的结构示意图；
图3为本申请提供的一种通信方法的流程图；
图4为本申请提供的一种传输过程的示意图；
图5为本申请提供的另一种传输过程的示意图；
图6为本申请提供的另一种传输过程的示意图；
图7为本申请提供的另一种传输过程的示意图；
图8为本申请提供的另一种传输过程的示意图；
图9为本申请提供的一种传输过程的示意图；
图10为本申请提供的另一种传输过程的示意图；
图11为本申请提供的另一种传输过程的示意图；
图12为本申请提供的另一种传输过程的示意图；
图13为本申请提供的另一种传输过程的示意图；
图14为本申请提供的一种通信装置的结构示意图；
图15为本申请提供的一种通信装置的结构图。
具体实施方式
下面将结合附图对本申请作进一步地详细描述。
本申请实施例提供一种通信方法及装置，用以明确占先机制下的传输过程。其中，本申请所述方法和装置基于同一技术构思，由于方法及装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。
以下，对本申请中的部分用语进行解释说明，以便于本领域技术人员理解。
1)、第一传输：亦称当前传输(ongoing transmission)。指原先在信道上正在进行的传输，但是需要临时中止而被占先传输所打断。
第二传输：亦称占先传输(preempt transmission)。指第一传输被中止后，临时立即进行的传输，往往用于承载高优先级业务或者低延时需求业务。
第三传输：在第二传输结束后，原第一传输的发送方立即执行的继续传输。可以理解为第三传输与第一传输所传输的业务相同，当然也可以不相同。
2)、单独保护设置(single protection setting)的TXOP，是一个帧中携带的NAV时间长度只保护一次传输或者一次双向帧交互的时间。
3)、多保护设置(multiple protection setting)的TXOP，是一个帧中携带的NAV时间 长度会保护多轮传输或者多轮帧交互的时间。
4)、在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
5)、本申请实施例中“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A、B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一(项)个”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a、b或c中的至少一项(个)，可以表示：a，b，c，a和b，a和c，b和c，或a、b和c，其中a、b、c可以是单个，也可以是多个。
为了更加清晰地描述本申请实施例的技术方案，下面结合附图，对本申请实施例提供的通信方法及装置进行详细说明。
图1示出了本申请实施例提供的通信方法适用的一种可能的通信系统的架构。所述通信系统的架构中包括至少一个接入点(access point，AP)(例如图1中的AP)和至少一个站点(station，STA)(例如图1中的STA1和STA2)。其中：所述AP可以但不限于包括通信服务器、路由器、交换机、网桥等等，所述STA可以但不限于包括手机(mobile phone)、平板电脑(Pad)，电脑笔记本，智能手表，智能电视等等。需要说明的是，通常STA既可以是AP，例如上述涉及的路由器等，也可以是非接入点的站点(non-AP STA)，例如上述涉及的手机等。
示例性的，AP或者STA的具体结构可以如图2示出的结构图所示，可以包括处理器、存储器、发送器、接收器、信号检测器以及数字信号处理器，可选的还可以包括用户界面。其中，发送器和所述接收器还可以合为收发器，本申请对此不作限定。
需要说明的是，图1示出的设备的名称仅仅是一种示例，在未来的通信系统中还可以有其它名称，图1中的设备数量也仅仅是示例，还可以包括更多或更少的设备，本申请对此不作限定。
在本申请提供的通信方法中，可以适用于AP与一个或多个STA之间的数据通信，也可以适用于AP与AP之间的数据通信，还可以适用于STA和STA之间的数据通信，本申请对此不作限定。
下面通过对本申请提供的通信方法进行详细说明，来明确占先机制的传输过程，以使通信系统可以高效地支持占先传输，既保障STA(包括AP和non-AP STA)之间竞争资源的公平性，又保障资源利用的高效性。
基于以上描述，本申请实施例提供的一种通信方法，适用于如图1所示的通信系统。参阅图3所示，该方法的具体流程包括：
步骤301：第一设备在第一时刻中止第一传输，并在第二时刻开始进行第二传输；其中，所述第二传输的传输优先级高于所述第一传输的优先级；所述第二时刻位于所述第一时刻之后，且与所述第一时刻间隔第一时长；所述第二时刻早于第三时刻，所述第三时刻为所述第一传输未被中止的情况下的传输结束时刻，或者为传输机会TXOP限制的结束时刻。其中，所述第一传输未被中止的情况下的传输结束时刻也就是所述第一传输未被中止的情况下的原计划结束时刻，也可以直接称为所述第一传输的原计划结束时刻。
其中，所述第一设备可以是图1所示的通信系统中的AP或者STA。
在一种可选的实施方式中，所述第一时长可以是某帧间间隔(x inter frame space，xIFS)，例如可以是短帧间间隔(short inter frame space，SIFS)。
步骤302：所述第一设备在所述第二传输结束后，可以执行如下操作a1或操作a2：
操作a1：所述第一设备释放信道；
操作a2：当第四时刻早于所述第三时刻时，所述第一设备在第五时刻开始进行第三传输，其中，所述第五时刻位于所述第四时刻之后，且与所述第四时刻间隔第二时长；所述第四时刻为所述第二传输结束的时刻；示例性的，所述第二时长可以是xIFS，例如可以是SIFS。
在上述操作a1中，在一种可选的实施方式中，当所述第四时刻早于或者等于所述第三时刻时，所述第一设备才执行上述操作a1。另一种可选的实施方式中，当所述第四时刻晚于所述第三时刻时，所述第一设备才执行上述操作a1。
一种实施例中，在所述第四时刻早于所述第三时刻的情况下，所述第一设备释放信道后，也即所述第一设备执行上述操作a1之后，在所述第三时刻到达之前，不进行信道竞争。这样可以保证STA之间的公平性。
另一种实施例中，当所述第四时刻早于所述第三时刻时，所述第一设备释放信道后，也即所述第一设备执行上述操作a1之后，所述第一设备在所述第三时刻到达之前，可以重新进行信道竞争。这样可以补偿所述第一设备的传输被打断所带来的负面影响。
在一种可选的实施方式中，在上述操作a2的情况下，所述第一设备根据所述第三传输结束的第六时刻与所述第三时刻的对比结果，还可以执行如下操作中的一项：
b1：当所述第六时刻早于所述第三时刻时，所述第一设备释放信道，并在所述第三时刻到达之前，不进行信道竞争；
b2：当所述第六时刻晚于或等于所述第三时刻时，所述第一设备释放信道。
在一种可选的实施方式中，所述第一传输配置有对应的应答帧，且当所述第四时刻晚于所述第三时刻且早于所述应答帧的预设结束时刻时，所述第一设备释放信道并重新进行信道竞争；或者所述第一设备在所述第五时刻开始进行第三传输。进一步地，当所述第三传输结束的第六时刻晚于所述应答帧的预设结束时刻时，所述第一设备释放信道。
在一种具体的实施方式中，当所述第四时刻晚于所述第三时刻时，或者，当所述第六时刻晚于所述第三时刻时，所述第一设备可以执行如下操作中的一项：
c1：所述第一设备在第三时长内，不进行信道竞争；其中，在所述第四时刻晚于所述第三时刻的情况下，所述第三时长的起始时刻为所述第四时刻，所述第三时长与所述第四时刻有关，或者所述第三时长与所述第四时刻和所述第一传输的接入类型(Access Category，AC)相关；或者，在所述第六时刻晚于所述第三时刻的情况下，所述第三时长的起始时刻为所述第六时刻，所述第三时长与所述第六时刻有关，或者所述第三时长与所述第六时刻和所述第一传输的接入类型相关；
示例性的，所述第三时长ΔT可以符合以下公式一或公式二：
ΔT＝f 1(t 2-t 1)          公式一；
其中，f 1是一个函数，例如，f 1表示ΔT＝t 2-t 1或者ΔT＝α(t 2-t 1)，其中α是一个固定的或者可以修改的数值，t 1为所述第三时刻，t 2为所述第四时刻或者为所述第六时刻；
ΔT＝f 2(t 2-t 1，AC)        公式二；
其中，f 2是一个函数，表示ΔT的取值与t 2-t 1的取值以及第一传输的接入类型AC有关。
c2：所述第一设备在所述第三时长内调整增强分布式信道接入(Enhanced Distributed Channel Access，EDCA)参数；示例性的，所述EDCA参数可以但不限于包括以下一项或多项：竞争窗(Contention Window，CW)大小、仲裁帧间间隔(Arbitration Interframe Space，AIFS)、TXOP时长限制(TXOP limit)；具体的，所述第一设备调整所述EDCA参数可以为增大CW、增大AIFS或者减小TXOP limit等。
c3：所述第一设备在所述第三时长内调整所述第一设备发送的每一个物理层协议数据单元(PHY Protocol Data Unit，PPDU)的最大传输时长；例如，所述第一设备可以减小每一个PPDU的最大传输时长；
c4：所述第一设备在所述第三时长内调整所述第一设备发送的每一个聚合的媒介接入控制管理协议数据单元(Aggregated Medium access control Protocol Data Unit，A-MPDU)的最大聚合帧个数，例如，所述第一设备可以减小每一个A-MPDU的最大聚合帧个数。
在一种可选的实施方式中，当所述第一传输配置有对应的应答帧时，所述第一设备在中止所述第一传输之后，在进行第二传输之前，所述第一设备先接收所述第一传输对应的所述应答帧。
在一种可选的实施方式中，当所述第一传输配置有对应的应答帧，且所述应答帧为立即应答配置时，所述第一设备在所述第一传输的最后至少一个MPDU中携带取消立即应答的指示，这样可以在中止第一传输后直接进行第二传输。例如，当MPDU为IEEE 802.11帧结构时，所述第一设备可以将帧结构中的服务质量控制(QoS Control)域中的确认规则(ACK Policy)域设置的00修改为11，来实现由立即确认规则(也即立即应答)改为块确认显式应答。
上述描述概括了所述第一设备的传输过程中存在占先传输的情况下，可能的传输过程，下面分别通过具体的示例来详细介绍一下不同的传输过程。在以下的示例中，以第一设备为STA(包括AP和non-AP STA)为例进行说明。
示例一：
在该示例中，针对单保护设置TXOP的占先机制，且适用于下述场景：在第一传输中的媒体接入控制(Medium Access Control，MAC)帧中的TXOP时长(Duration)设置为0或者第一传输的高效率信号域A(High Efficient Signal Field A，HE SIG-A)中的TXOP域设置为未指定(UNSPECIFIED)。具体的，该示例一中的传输过程可以为：
步骤d1：某个STA(即第一设备)成功竞争到信道并发起第一传输，设第一传输的原计划结束时刻(也即上述第三时刻)为
Figure PCTCN2021095419-appb-000001
然后所述STA执行步骤d2。
步骤d2：所述STA在
Figure PCTCN2021095419-appb-000002
时刻(也即上述第一时刻)中止所述第一传输，并在第一传输中止后等待xIFS(如SIFS)时长(也即上述第一时长)后，立即发起第二传输。例如，可以如图4至图6所示。其中，图4是指所述第二传输仅仅包含一个帧；图5和图6是指所述第二传输可以包含多个帧，具体可以包含交互的帧，例如图5中的数据帧和确认帧，又例如图6中的触发帧，上行传输和确认帧；需要说明的是，图6中所述STA可以是AP，并且所述AP在所述第二传输过程中通过发送触发帧(Trigger Frame，TF)来调度上行传输的流程。
在该示例一中，步骤d2中所述第二传输中任何一个帧的传输结束时刻以及所述第二传输每一个帧的NAV设置的结束时刻均等于或者早于所述第一传输的原计划结束时刻
Figure PCTCN2021095419-appb-000003
在所述第二传输结束后，所述STA执行步骤d3。
步骤d3：如果所述第二传输的结束时刻(也即上述第四时刻)仍未到达所述第一传输的原计划结束时刻
Figure PCTCN2021095419-appb-000004
所述STA可以执行如下选择之一：
选择(1)：所述STA释放信道，并且保证在所述第一传输的原计划结束时刻之前不允许竞争信道。此时，流程结束，如图7所示。需要说明的是，在该选择(1)中与所述STA进行第一传输和第二传输的设备也需要释放信道，并且保证在所述第一传输的原计划结束时刻之前不允许竞争信道。
选择(2)：所述STA决定发起第三传输，执行步骤d4，如图4至图6所示。
步骤d4：所述STA在所述第二传输结束并等待xIFS(如SIFS)后(也即在上述第五时刻)立即发起第三传输。在该示例一中，所述第三传输的结束时刻(也即上述第六时刻)等于或早于所述第一传输的原计划结束时刻。然后所述STA执行步骤d5。
步骤d5：如果第三传输结束后，仍未到达第一传输的原计划结束时间
Figure PCTCN2021095419-appb-000005
则所述STA需要释放信道，并且保证在第一传输的原计划结束时刻之前不允许竞争信道。此时，流程结束。需要说明的是，在该情况下，与所述STA进行第三传输的设备在第一传输的原计划结束时刻之前也不允许竞争信道。
在上述示例一所述具有占先传输(第二传输)的传输过程中，既可以保障STA之间的公平性，又可以保障资源利用的高效性。
示例二：
在该示例中，基于第三传输允许晚于第一传输原计划结束时间的占先机制，该示例与上述示例一适用的场景相同。该示例二的传输过程与上述示例一的流程总体一致，但区别在于该示例二中允许第三传输的结束时刻晚于第一传输原计划结束时刻
Figure PCTCN2021095419-appb-000006
具体的，该示例二的传输过程可以为：
步骤e1：某个STA(即第一设备)成功竞争到信道并发起第一传输，设第一传输的原计划结束时刻(也即上述第三时刻)为
Figure PCTCN2021095419-appb-000007
然后所述STA执行步骤e2。
步骤e2：所述STA在
Figure PCTCN2021095419-appb-000008
时刻(也即上述第一时刻)中止所述第一传输，并在第一传输中止后等待xIFS(如SIFS)时长(也即上述第一时长)后，立即发起第二传输。
在该示例二中，与示例一种步骤d2不同的是，步骤e2中所述第二传输的传输结束时刻以及第二传输每一个帧的NAV设置的结束时刻不限定等于或者早于所述第一传输的原计划结束时刻
Figure PCTCN2021095419-appb-000009
也即可以晚于
Figure PCTCN2021095419-appb-000010
在所述第二传输结束后，所述STA执行步骤e3。
步骤e3：如果第二传输的结束时刻已经达到或者超过第一传输的原计划结束时刻
Figure PCTCN2021095419-appb-000011
则流程结束。反之，如果第二传输结束时刻未到达第一传输的原计划结束时刻
Figure PCTCN2021095419-appb-000012
则所述STA可以执行如下选择之一：
选择(1)：所述STA释放信道，并且保证在所述第一传输的原计划结束时刻之前不允许竞争信道。此时，流程结束。需要说明的是，在该选择(1)中与所述STA进行第一传输和第二传输的设备也需要释放信道，并且保证在所述第一传输的原计划结束时刻之前不允许竞争信道。
选择(2)：所述STA决定发起第三传输，执行步骤e4。
步骤e4：所述STA在第二传输结束并等待xIFS(如SIFS)后(也即在上述第五时刻)立即发起第三传输。其中，与上述示例一不同，该示例二中的第三传输的结束时刻可以超过第一传输的原计划结束时刻，以使得被打断的第一传输的剩余信息得到完整传输。然后， 所述STA执行步骤e5。
步骤e5：所述第三传输的结束时刻
Figure PCTCN2021095419-appb-000013
(也即上述第六时刻)如果超过了第一传输的原计划结束时刻
Figure PCTCN2021095419-appb-000014
则所述STA执行下述选择之一之后流程结束：
选择(1)：所述STA释放信道，如图8所示。
选择(2)：所述STA释放信道，且在一个ΔT时间(也即上述第三时长)内不允许(即禁止)所述STA竞争信道，如图9所示。其中ΔT的数值可以通过上述公式一或公式二确定，其中，在上述公式一或公式二中，t 2为
Figure PCTCN2021095419-appb-000015
t 1为
Figure PCTCN2021095419-appb-000016
选择(3)：所述STA释放信道，且所述STA在ΔT时间内调整EDCA参数。例如，增大CW、增大AIFS或者减小TXOP limit。
选择(4)：释放信道，且所述STA在ΔT时间内调整每一个PPDU的最大传输时长，例如减小每一个PPDU的最大传输时长。
选择(5)：释放信道，且所述STA在ΔT时间内进行调整每一个A-MPDU的最大聚合帧个数，例如减小每一个A-MPDU的最大聚合帧个数。
通过上述示例二，在上述示例一的基础上，在第一传输被中止之后能够在一定程度上补偿第一传输被打断所受到的影响。
示例三：
该示例三针对多保护设置的TXOP的占先机制，具体的，该示例三的传输过程可以为：
步骤f1：在一个多保护设置的TXOP(该示例中将此TXOP称为原TXOP)内，某个STA正在进行第一传输，设原TXOP的TXOP limit的结束时刻(也即上述第三时刻)为
Figure PCTCN2021095419-appb-000017
然后，所述STA执行步骤f2。
步骤f2：所述STA在
Figure PCTCN2021095419-appb-000018
时刻(也即上述第一时刻)中止第一传输，并在第一传输中止后等待xIFS(如SIFS)时长(也即上述第一时长)后，立即发起第二传输。需要说明的是，在该示例三中第二传输的预期和实际结束时刻均不需要受限于TXOP limit的结束时刻的限制。所述STA在第二传输结束后执行步骤f3。
步骤f3：设第二传输的结束时刻(也即上述第四时刻)为
Figure PCTCN2021095419-appb-000019
如果第二传输的结束时刻仍未超过
Figure PCTCN2021095419-appb-000020
即
Figure PCTCN2021095419-appb-000021
则所述STA(原TXOP的持有者(TXOP holder))可以继续使用原TXOP，流程结束。如果第二传输的结束时刻已经超过
Figure PCTCN2021095419-appb-000022
即
Figure PCTCN2021095419-appb-000023
则所述STA可以执行下述选择之一之后流程结束：
选择(1)：所述STA释放信道。
选择(2)：所述STA释放信道，且在一个ΔT时间内(也即上述第三时长)不允许所述STA竞争信道，参见图10所示。其中ΔT的数值可以通过上述公式一或公式二确定，其中，在上述公式一或公式二中，t 2为
Figure PCTCN2021095419-appb-000024
t 1为
Figure PCTCN2021095419-appb-000025
选择(3)至选择(5)与上述示例二中步骤e5中的选择(3)至选择(5)相同，可以相互参见，此处不再详细描述。
上述示例三可以实现在多保护设置TXOP的占先机制中，使得为了保障低时延业务而不用受到TXOP limit的限制。
示例四：
该示例四针对第一传输有应答的情形下的占先机制，也即所述第一传输配置有对应的应答帧。该示例四针对单保护设置TXOP，且适用于下述场景：在第一传输中的MAC帧中的TXOP时长(Duration)设置为0或者第一传输的高效率信号域A(HE SIG-A)中的 TXOP域设置为未指定(UNSPECIFIED)。该示例四与示例一类似，区别在于STA在进行第二传输以及第三传输时明确获知第一传输原计划发送的帧拥有应答帧，则对于第二传输的最晚结束时刻的计算存在差别。具体的，该示例四的传输过程可以为：
步骤g1：某个STA(即第一设备)成功竞争到信道并发起第一传输，设第一传输的原计划结束时刻(也即上述第三时刻)为
Figure PCTCN2021095419-appb-000026
且第一传输原计划有对应的应答帧，应答帧和第一传输的原计划结束时刻的帧间间隔设为yIFS，并假设应答帧的传输时长为
Figure PCTCN2021095419-appb-000027
然后所述STA执行步骤g2。
步骤g2：所述STA在
Figure PCTCN2021095419-appb-000028
时刻(也即上述第一时刻)中止第一传输，并在第一传输中止后等待xIFS(如SIFS)时长(也即上述第一时长)后，立即发起第二传输。在该示例四中，步骤g2中第二传输中任何一个帧的传输结束时刻以及第二传输每一个帧的NAV设置的结束时刻等于或者早于
Figure PCTCN2021095419-appb-000029
在所述第二传输结束后，所述STA执行步骤g3。
步骤g3：在一种情况中，当第二传输的结束时刻仍未到达或超过第一传输的原计划结束时刻
Figure PCTCN2021095419-appb-000030
则所述STA可以执行如下选择之一：
选择(1)：所述STA释放信道，并且保证在第一传输的原计划结束时刻
Figure PCTCN2021095419-appb-000031
之前不允许竞争信道。此时，流程结束。需要说明的是，在该选择(1)中与所述STA进行第一传输和第二传输的设备也需要释放信道，并且保证在所述第一传输的原计划结束时刻之前不允许竞争信道。
选择(2)：所述STA决定发起第三传输，然后执行步骤g4。其中，当第三传输的传输结束时刻不超过第一传输的原计划结束时刻
Figure PCTCN2021095419-appb-000032
后续流程与上述示例一中步骤d5相同，可以参见上述示例一中步骤d5的内容，此处不再详细描述。
在另一种情况中，第二传输的结束时刻超过了第一传输的原计划结束时刻
Figure PCTCN2021095419-appb-000033
但未超过
Figure PCTCN2021095419-appb-000034
(也即上述应答帧的预设结束时刻)，例如图11所示，则所述STA(以及与所述STA进行第一传输和第二传输的设备)可以执行如下选择之一：
选择(1)：所述STA均释放信道，且可以重新竞争信道。此时，流程结束。
选择(2)：所述STA决定发起第三传输，然后执行步骤g4。
步骤g4：第三传输结束的结束时刻
Figure PCTCN2021095419-appb-000035
如果超过了
Figure PCTCN2021095419-appb-000036
则所述STA执行上述示例二中步骤e5中涉及的选择(1)-(5)中的选择之一。
在一种可选的实施方式中，在该示例四中，在第一传输被中断后可以立即进行确认，之后才可以进入第二传输，如图12所示。传输过程在上述步骤g1之后执行：所述STA在
Figure PCTCN2021095419-appb-000037
时刻中止第一传输，并在第一传输的应答帧传输接收后等待xIFS(如SIFS)时长后，立即发起第二传输。之后第二传输结束后的其他流程与上述示例一的步骤d3-d5一致或者与上述示例二的步骤e3-e5一致，可以相互参见，此处不再详细描述。
在一种可选的实施方式中，在该示例四中，可以如图13所示，原第一传输的帧要求对端立即回复确认帧(Acknowledgement)或者块确认帧(Block ACK，BA)，但是由于需要临时传输第二传输，因此可以在第一传输的最后一个或者最后若干个MPDU中指示取消隐式立即确认规则(IEEE 802.11帧结构中的QoS Control域中的ACK Policy域设置为00)，改为块确认显式应答(IEEE 802.11帧结构中的QoS Control域中的ACK Policy域设置为11)。第一传输结束后的其他流程与上述示例一的步骤d2-d5相同或者与上述示例二的步骤e2-e5相同，可以相互参见，此处不再详细描述。
通过上述示例四，可以使得第二传输以及第三传输与应答机制相适配，传输比较灵活。
示例五：
在该示例五中，是针对始终不允许第三传输且不能重新竞争信道的占先机制，该示例五是与上述示例一中图7所对应的方案相同。具体的，该示例五的传输过程可以为：
步骤h1-步骤h2与上述示例1中步骤d1-步骤d2相同，可以相互参见，此处不再详细描述。
步骤h3：如果所述第二传输的结束时刻(也即上述第四时刻)仍未到达所述第一传输的原计划结束时刻
Figure PCTCN2021095419-appb-000038
则所述STA释放信道，并且在第一传输的原计划结束时刻之前不允许竞争信道。然后流程结束。
示例六：
在该示例六中，是允许第二传输结束后释放信道并重新竞争信道的占先机制，该示例六针对单保护设置TXOP，且适用于下述场景：在第一传输中的MAC帧中的TXOP时长(Duration)设置为0或者第一传输的高效率信号域A(HE SIG-A)中的TXOP域设置为未指定(UNSPECIFIED)。具体的，该示例六的传输过程可以为：
步骤i1-步骤i2与上述示例1中步骤d1-步骤d2相同，可以相互参见，此处不再详细描述。
步骤i3：如果所述第二传输的结束时刻(也即上述第四时刻)仍未到达所述第一传输的原计划结束时刻
Figure PCTCN2021095419-appb-000039
则所述STA释放信道。但是与示例五的区别在于，在所述STA释放信道之后，所述STA始终允许在第一传输的原计划结束时刻之前采用IEEE 802.11现有信道竞争机制重新竞争信道。另外，可以允许也可以不允许第一传输的接收方以及与所述STA进行第二传输的设备在第一传输的原计划结束时刻之前采用IEEE 802.11现有信道竞争机制重新竞争信道。然后流程结束。
在该示例六中，允许第二传输结束后释放信道并重新竞争信道的占先机制，可以使得被打断的传输的参与方仍可以重新竞争信道，补偿了其传输被打断所带来的负面影响。
基于以上实施例，本申请实施例还提供了一种通信装置，参阅图14所示，通信装置1400可以包括处理单元1401和收发单元1402。其中，所述收发单元1402用于所述通信装置1400进行通信传输，例如，接收信息(帧、消息或数据)或发送信息(帧、消息或数据)，所述处理单元1401用于对所述通信装置1400的动作进行控制管理。所述处理单元1401还可以控制所述收发单元1402执行的步骤。
示例性的，该通信装置1400可以是上述实施例中的第一设备，具体可以是第一设备中的处理器，或者芯片或者芯片系统，或者是一个功能模块等。具体的，在所述通信装置1400用于实现上述图3所示的实施例中第一设备的功能时，具体可以包括：
所述处理单元1401用于控制所述收发单元1402在第一时刻中止第一传输，以及在第二时刻开始进行第二传输；其中，所述第二传输的传输优先级高于所述第一传输的优先级；所述第二时刻位于所述第一时刻之后、且与所述第一时刻间隔第一时长；所述第二时刻早于第三时刻，所述第三时刻为所述第一传输未被中止的情况下的传输结束时刻，或者为传输机会TXOP限制的结束时刻；所述处理单元1401还用于在所述收发单元1402的第二传输结束后，释放信道；或者，在所述收发单元1402的第二传输结束后，当第四时刻早于所述第三时刻时，控制所述收发单元1402在第五时刻开始进行第三传输，其中，所述第 五时刻位于所述第四时刻之后，且与所述第四时刻间隔第二时长；所述第四时刻为所述第二传输结束的时刻。
在一种可选的实施方式中，所述处理单元1401在所述收发单元1402的第二传输结束后释放信道时，具体用于：在所述收发单元1402的第二传输结束后，当所述第四时刻早于或者等于所述第三时刻时，释放信道；当所述第四时刻早于所述第三时刻时，所述处理单元1401在释放信道后，还用于：在所述第三时刻到达之前，不进行信道竞争或者重新进行信道竞争。
具体的，所述处理单元1401在所述收发单元1402的第二传输结束后释放信道时，具体用于：在所述收发单元1402的第二传输结束后，当所述第四时刻晚于所述第三时刻时，释放信道；进一步地，所述处理单元1401，还用于：在第三时长内，不进行信道竞争；其中，所述第三时长的起始时刻为所述第四时刻，所述第三时长与所述第四时刻有关，或者所述第三时长与所述第四时刻和所述第一传输的接入类型相关；或者，在所述第三时长内调整增强分布式信道接入EDCA参数；或者，在所述第三时长内调整所述第一设备发送的每一个物理层协议数据单元PPDU的最大传输时长；或者，在所述第三时长内调整所述第一设备发送的每一个聚合的媒介接入控制管理协议数据单元A-MPDU的最大聚合帧个数。
在一种示例性的实施方式中，所述处理单元1401还用于：根据所述收发单元1402的第三传输结束的第六时刻与所述第三时刻的对比结果，执行如下操作中的一项：当所述第六时刻早于所述第三时刻时，释放信道，并在所述第三时刻到达之前，不进行信道竞争；当所述第六时刻晚于或等于所述第三时刻时，释放信道。
示例性的，当所述第六时刻晚于所述第三时刻时，所述处理单元1401还用于：在第三时长内，不进行信道竞争；所述第三时长的起始时刻为所述第六时刻，所述第三时长与所述第六时刻有关，或者所述第三时长与所述第六时刻和所述第一传输的接入类型相关；或者，在所述第三时长内调整增强分布式信道接入EDCA参数；或者，在所述第三时长内调整所述第一设备发送的每一个物理层协议数据单元PPDU的最大传输时长；或者，在所述第三时长内调整所述第一设备发送的每一个聚合的媒介接入控制管理协议数据单元A-MPDU的最大聚合帧个数。
具体的，所述EDCA参数可以包括以下一项或多项：竞争窗CW大小、仲裁帧间间隔AIFS、TXOP时长限制。
在一种可选的实施方式中，所述处理单元1401，还用于：所述收发单元1402的第一传输配置有对应的应答帧，且当所述第四时刻晚于所述第三时刻且早于所述应答帧的预设结束时刻时，释放信道并重新进行信道竞争；或者，当所述第四时刻晚于所述第三时刻且早于所述应答帧的预设结束时刻时，控制所述收发单元1402在所述第五时刻开始进行第三传输。
在一种可选的实施方式中，所述处理单元1401还用于：当所述收发单元1402的第三传输结束的第六时刻晚于所述应答帧的预设结束时刻时，释放信道。
在一种可选的实施方式中，所述处理单元1401还用于：在控制所述收发单元1402中止所述第一传输之后，在进行第二传输之前，控制所述收发单元1402接收所述第一传输对应的应答帧。
在一种可选的实施方式中，当所述收发单元1402的第一传输配置有对应的应答帧，且所述应答帧为立即应答配置时，所述处理单元1401还用于：在所述收发单元1402的第 一传输的最后至少一个媒介接入控制管理协议数据单元MPDU中携带取消立即应答的指示。
需要说明的是，本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。在本申请的实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
基于以上实施例，本申请实施例还提供了一种通信装置，参阅图15所示，通信装置1500可以包括收发器1501和处理器1502。可选的，所述通信装置1500中还可以包括存储器1503。其中，所述存储器1503可以设置于所述通信装置1500内部，还可以设置于所述通信装置1500外部。其中，所述处理器1502可以控制所述收发器1501接收和发送数据。
具体的，所述处理器1502可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合。所述处理器1502还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic，GAL)或其任意组合。
其中，所述收发器1501、所述处理器1502和所述存储器1503之间相互连接。可选的，所述收发器1501、所述处理器1502和所述存储器1503通过总线1504相互连接；所述总线1504可以是外设部件互连标准(Peripheral Component Interconnect，PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图15中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
在一种可选的实施方式中，所述存储器1503，用于存放程序等。具体地，程序可以包括程序代码，该程序代码包括计算机操作指令。所述存储器1503可能包括RAM，也可能还包括非易失性存储器(non-volatile memory)，例如一个或多个磁盘存储器。所述处理器1502执行所述存储器1503所存放的应用程序，实现上述功能，从而实现通信装置1500的功能。
示例性的，该通信装置1500可以是上述第一设备。在通信装置1500用于实现上述图3所示的实施例中所述第一设备的功能时，具体可以包括：
所述收发器1501用于进行通信传输；所述处理器1502用于控制所述收发器1501在 第一时刻中止第一传输，以及在第二时刻开始进行第二传输；其中，所述第二传输的传输优先级高于所述第一传输的优先级；所述第二时刻位于所述第一时刻之后、且与所述第一时刻间隔第一时长；所述第二时刻早于第三时刻，所述第三时刻为所述第一传输未被中止的情况下的传输结束时刻，或者为传输机会TXOP限制的结束时刻；所述处理器1502还用于在所述收发器1501的第二传输结束后，释放信道；或者，在所述收发器1501的第二传输结束后，当第四时刻早于所述第三时刻时，控制所述收发器1501在第五时刻开始进行第三传输，其中，所述第五时刻位于所述第四时刻之后，且与所述第四时刻间隔第二时长；所述第四时刻为所述第二传输结束的时刻。
在一种可选的实施方式中，所述处理器1502在所述收发器1501的第二传输结束后释放信道时，具体用于：在所述收发器1501的第二传输结束后，当所述第四时刻早于或者等于所述第三时刻时，释放信道；当所述第四时刻早于所述第三时刻时，所述处理器1502在释放信道后，还用于：在所述第三时刻到达之前，不进行信道竞争或者重新进行信道竞争。
具体的，所述处理器1502在所述收发器1501的第二传输结束后释放信道时，具体用于：在所述收发器1501的第二传输结束后，当所述第四时刻晚于所述第三时刻时，释放信道；进一步地，所述处理器1502，还用于：在第三时长内，不进行信道竞争；其中，所述第三时长的起始时刻为所述第四时刻，所述第三时长与所述第四时刻有关，或者所述第三时长与所述第四时刻和所述第一传输的接入类型相关；或者，在所述第三时长内调整增强分布式信道接入EDCA参数；或者，在所述第三时长内调整所述第一设备发送的每一个物理层协议数据单元PPDU的最大传输时长；或者，在所述第三时长内调整所述第一设备发送的每一个聚合的媒介接入控制管理协议数据单元A-MPDU的最大聚合帧个数。
在一种示例性的实施方式中，所述处理器1502还用于：根据所述收发器1501的第三传输结束的第六时刻与所述第三时刻的对比结果，执行如下操作中的一项：当所述收发器1501的第六时刻早于所述第三时刻时，释放信道，并在所述第三时刻到达之前，不进行信道竞争；当所述第六时刻晚于或等于所述第三时刻时，释放信道。
示例性的，当所述第六时刻晚于所述第三时刻时，所述处理器1502还用于：在第三时长内，不进行信道竞争；所述第三时长的起始时刻为所述第六时刻，所述第三时长与所述第六时刻有关，或者所述第三时长与所述第六时刻和所述第一传输的接入类型相关；或者，在所述第三时长内调整增强分布式信道接入EDCA参数；或者，在所述第三时长内调整所述第一设备发送的每一个物理层协议数据单元PPDU的最大传输时长；或者，在所述第三时长内调整所述第一设备发送的每一个聚合的媒介接入控制管理协议数据单元A-MPDU的最大聚合帧个数。
具体的，所述EDCA参数可以包括以下一项或多项：竞争窗CW大小、仲裁帧间间隔AIFS、TXOP时长限制。
在一种可选的实施方式中，所述处理器1502还用于：所述收发器1501的第一传输配置有对应的应答帧，且当所述第四时刻晚于所述第三时刻且早于所述应答帧的预设结束时刻时，释放信道并重新进行信道竞争；或者，当所述第四时刻晚于所述第三时刻且早于所述应答帧的预设结束时刻时，控制所述收发器1501在所述第五时刻开始进行第三传输。
在一种可选的实施方式中，所述处理器1502还用于：当所述收发器1501的第三传输结束的第六时刻晚于所述应答帧的预设结束时刻时，释放信道。
在一种可选的实施方式中，所述处理器1502还用于：在控制所述收发器1501中止所述第一传输之后，在进行第二传输之前，制所述收发器1501接收所述第一传输对应的应答帧。
在一种可选的实施方式中，当所述收发器1501的第一传输配置有对应的应答帧，且所述应答帧为立即应答配置时，所述处理器1502还用于：在所述收发器1501的第一传输的最后至少一个媒介接入控制管理协议数据单元MPDU中携带取消立即应答的指示。
基于以上实施例，本申请实施例提供了一种通信系统，该通信系统可以包括上述实施例涉及的STA和AP等。
本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序或指令，该计算机程序或指令被计算机执行时，所述计算机可以实现上述方法实施例提供的通信方法。
本申请实施例还提供一种计算机程序产品，所述计算机程序产品用于存储计算机程序，该计算机程序被计算机执行时，所述计算机可以实现上述方法实施例提供的通信方法。
本申请实施例还提供一种芯片，所述芯片与存储器耦合，所述芯片用于实现上述方法实施例提供的通信方法。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的保护范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (21)

  1. 一种通信方法，其特征在于，包括：
    第一设备在第一时刻中止第一传输，并在第二时刻开始进行第二传输；其中，所述第二传输的传输优先级高于所述第一传输的优先级；所述第二时刻位于所述第一时刻之后、且与所述第一时刻间隔第一时长；所述第二时刻早于第三时刻，所述第三时刻为所述第一传输未被中止的情况下的传输结束时刻，或者为传输机会TXOP限制的结束时刻；
    所述第一设备在所述第二传输结束后，释放信道；或者当第四时刻早于所述第三时刻时，所述第一设备在第五时刻开始进行第三传输，其中，所述第五时刻位于所述第四时刻之后，且与所述第四时刻间隔第二时长；所述第四时刻为所述第二传输结束的时刻。
  2. 如权利要求1所述的方法，其特征在于，所述第一设备在所述第二传输结束后，释放信道，包括：
    所述第一设备在所述第二传输结束后，当所述第四时刻早于或者等于所述第三时刻时，所述第一设备释放信道；
    当所述第四时刻早于所述第三时刻时，所述第一设备释放信道后，所述方法还包括：
    所述第一设备在所述第三时刻到达之前，不进行信道竞争或者重新进行信道竞争。
  3. 如权利要求1所述的方法，其特征在于，所述第一设备在所述第二传输结束后，释放信道，包括：
    所述第一设备在所述第二传输结束后，当所述第四时刻晚于所述第三时刻时，所述第一设备释放信道；
    所述方法还包括：
    所述第一设备在第三时长内，不进行信道竞争；其中，所述第三时长的起始时刻为所述第四时刻，所述第三时长与所述第四时刻有关，或者所述第三时长与所述第四时刻和所述第一传输的接入类型相关；或者
    所述第一设备在所述第三时长内调整增强分布式信道接入EDCA参数；或者
    所述第一设备在所述第三时长内调整所述第一设备发送的每一个物理层协议数据单元PPDU的最大传输时长；或者
    所述第一设备在所述第三时长内调整所述第一设备发送的每一个聚合的媒介接入控制管理协议数据单元A-MPDU的最大聚合帧个数。
  4. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一设备根据所述第三传输结束的第六时刻与所述第三时刻的对比结果，执行如下操作中的一项：
    当所述第六时刻早于所述第三时刻时，所述第一设备释放信道，并在所述第三时刻到达之前，不进行信道竞争；
    当所述第六时刻晚于或等于所述第三时刻时，所述第一设备释放信道。
  5. 如权利要求4所述的方法，其特征在于，当所述第六时刻晚于所述第三时刻时，所述方法还包括：
    所述第一设备在第三时长内，不进行信道竞争；所述第三时长的起始时刻为所述第六时刻，所述第三时长与所述第六时刻有关，或者所述第三时长与所述第六时刻和所述第一传输的接入类型相关；或者
    所述第一设备在所述第三时长内调整增强分布式信道接入EDCA参数；或者
    所述第一设备在所述第三时长内调整所述第一设备发送的每一个物理层协议数据单元PPDU的最大传输时长；或者
    所述第一设备在所述第三时长内调整所述第一设备发送的每一个聚合的媒介接入控制管理协议数据单元A-MPDU的最大聚合帧个数。
  6. 如权利要求3或5所述的方法，其特征在于，所述EDCA参数包括以下一项或多项：竞争窗CW大小、仲裁帧间间隔AIFS、TXOP时长限制。
  7. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一传输配置有对应的应答帧，且当所述第四时刻晚于所述第三时刻且早于所述应答帧的预设结束时刻时，所述第一设备释放信道并重新进行信道竞争；或者所述第一设备在所述第五时刻开始进行第三传输。
  8. 如权利要求7所述的方法，其特征在于，所述方法还包括：
    当所述第三传输结束的第六时刻晚于所述应答帧的预设结束时刻时，所述第一设备释放信道。
  9. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一设备在中止所述第一传输之后，在进行第二传输之前，所述第一设备接收所述第一传输对应的应答帧。
  10. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一传输配置有对应的应答帧，且所述应答帧为立即应答配置时，所述第一设备在所述第一传输的最后至少一个媒介接入控制管理协议数据单元MPDU中携带取消立即应答的指示。
  11. 一种通信装置，其特征在于，包括：
    收发单元，用于进行通信传输；
    处理单元，用于控制所述收发单元在第一时刻中止第一传输，以及在第二时刻开始进行第二传输；其中，所述第二传输的传输优先级高于所述第一传输的优先级；所述第二时刻位于所述第一时刻之后、且与所述第一时刻间隔第一时长；所述第二时刻早于第三时刻，所述第三时刻为所述第一传输未被中止的情况下的传输结束时刻，或者为传输机会TXOP限制的结束时刻；
    所述处理单元，还用于在所述收发单元的第二传输结束后，释放信道；或者在所述收发单元的第二传输结束后，当第四时刻早于所述第三时刻时，控制所述收发单元在第五时刻开始进行第三传输，其中，所述第五时刻位于所述第四时刻之后，且与所述第四时刻间隔第二时长；所述第四时刻为所述第二传输结束的时刻。
  12. 如权利要求11所述的通信装置，其特征在于，所述处理单元，在所述收发单元的第二传输结束后释放信道时，具体用于：
    在所述收发单元的第二传输结束后，当所述第四时刻早于或者等于所述第三时刻时，释放信道；
    当所述第四时刻早于所述第三时刻时，所述处理单元在释放信道后，还用于：
    在所述第三时刻到达之前，不进行信道竞争或者重新进行信道竞争。
  13. 如权利要求11所述的通信装置，其特征在于，所述处理单元，在所述收发单元的第二传输结束后释放信道时，具体用于：
    在所述收发单元的第二传输结束后，当所述第四时刻晚于所述第三时刻时，释放信道；
    所述处理单元，还用于：
    在第三时长内，不进行信道竞争；其中，所述第三时长的起始时刻为所述第四时刻，所述第三时长与所述第四时刻有关，或者所述第三时长与所述第四时刻和所述第一传输的接入类型相关；或者
    在所述第三时长内调整增强分布式信道接入EDCA参数；或者
    在所述第三时长内调整所述第一设备发送的每一个物理层协议数据单元PPDU的最大传输时长；或者
    在所述第三时长内调整所述第一设备发送的每一个聚合的媒介接入控制管理协议数据单元A-MPDU的最大聚合帧个数。
  14. 如权利要求11所述的通信装置，其特征在于，所述处理单元，还用于：
    根据所述收发单元的第三传输结束的第六时刻与所述第三时刻的对比结果，执行如下操作中的一项：
    当所述第六时刻早于所述第三时刻时，释放信道，并在所述第三时刻到达之前，不进行信道竞争；
    当所述第六时刻晚于或等于所述第三时刻时，释放信道。
  15. 如权利要求14所述的通信装置，其特征在于，当所述第六时刻晚于所述第三时刻时，所述处理单元还用于：
    在第三时长内，不进行信道竞争；所述第三时长的起始时刻为所述第六时刻，所述第三时长与所述第六时刻有关，或者所述第三时长与所述第六时刻和所述第一传输的接入类型相关；或者
    在所述第三时长内调整增强分布式信道接入EDCA参数；或者
    在所述第三时长内调整所述第一设备发送的每一个物理层协议数据单元PPDU的最大传输时长；或者
    在所述第三时长内调整所述第一设备发送的每一个聚合的媒介接入控制管理协议数据单元A-MPDU的最大聚合帧个数。
  16. 如权利要求13或15所述的通信装置，其特征在于，所述EDCA参数包括以下一项或多项：竞争窗CW大小、仲裁帧间间隔AIFS、TXOP时长限制。
  17. 如权利要求11所述的通信装置，其特征在于，所述处理单元，还用于：
    所述第一传输配置有对应的应答帧，且当所述第四时刻晚于所述第三时刻且早于所述应答帧的预设结束时刻时，释放信道并重新进行信道竞争；或者
    当所述第四时刻晚于所述第三时刻且早于所述应答帧的预设结束时刻时，控制所述收发单元在所述第五时刻开始进行第三传输。
  18. 如权利要求17所述的通信装置，其特征在于，所述处理单元，还用于：
    当所述收发单元的第三传输结束的第六时刻晚于所述应答帧的预设结束时刻时，释放信道。
  19. 如权利要求11所述的通信装置，其特征在于，所述处理单元还用于：
    在控制所述收发单元中止所述第一传输之后，进行第二传输之前，控制所述收发单元接收所述第一传输对应的应答帧。
  20. 如权利要求11所述的通信装置，其特征在于，所述处理单元，还用于：
    在所述第一传输配置有对应的应答帧，且所述应答帧为立即应答配置时，在所述收发单元的第一传输的最后至少一个媒介接入控制管理协议数据单元MPDU中携带取消立即应答的指示。
  21. 一种计算机可读存储介质，其特征在于，包括指令，当所述指令在计算机上运行时，使得计算机执行如权利要求1-10中任一项所述的方法。
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