WO2021057979A1 - 通信链路确定方法、装置、设备及存储介质 - Google Patents

通信链路确定方法、装置、设备及存储介质 Download PDF

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Publication number
WO2021057979A1
WO2021057979A1 PCT/CN2020/118159 CN2020118159W WO2021057979A1 WO 2021057979 A1 WO2021057979 A1 WO 2021057979A1 CN 2020118159 W CN2020118159 W CN 2020118159W WO 2021057979 A1 WO2021057979 A1 WO 2021057979A1
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WIPO (PCT)
Prior art keywords
communication link
channel state
idle
time period
link set
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PCT/CN2020/118159
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English (en)
French (fr)
Inventor
韩志强
方永刚
孙波
李楠
杨丹
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP20868613.9A priority Critical patent/EP4037417A4/en
Priority to US17/762,393 priority patent/US20220346141A1/en
Publication of WO2021057979A1 publication Critical patent/WO2021057979A1/zh

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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]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/008—Transmission of channel access control information with additional processing of random access related information at receiving side
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access

Definitions

  • This application relates to a wireless communication network, for example, to a method, device, device, and storage medium for determining a communication link.
  • Multi-link communication technology can provide more communication links for devices. And a larger transmission bandwidth, so as to transmit more data, each communication link can be called a channel (Channel), or link (Link) or band (Band), the use of the channel state is idle communication link can transmit data .
  • the bandwidth of each communication link is composed of the basic bandwidth set in the frequency band where the communication link is located.
  • the channel state of each communication link is constantly changing, and data transmission between the communication links is conflicted, resulting in poor reliability of the multi-link communication.
  • the present application provides a method, device, device, and storage medium for determining a communication link to improve the reliability of multi-link communication.
  • An embodiment of the present application provides a method for determining a communication link, including:
  • An embodiment of the present application also provides a communication link determination device, including:
  • the first link determining module is configured to determine the first communication link set whose channel status is idle among the communication link sets supported by the device;
  • the second link determining module is configured to determine the second communication link set according to the channel state of the first communication link set within a preset time period
  • the target link determining module is configured to determine the target communication link set for transmitting the wireless frame according to the channel state of the second communication link set during the backoff process.
  • the embodiment of the present application also provides a device, including:
  • One or more processors are One or more processors;
  • Storage device for storing one or more programs
  • the one or more processors When the one or more programs are executed by the one or more processors, the one or more processors implement the aforementioned communication link determination method.
  • the embodiment of the present application also provides a computer-readable storage medium, and a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the foregoing method for determining a communication link is implemented.
  • FIG. 1 is a flowchart of a method for determining a communication link according to an embodiment
  • FIG. 2 is a schematic diagram of the logical architecture of the medium access control sublayer and the physical layer in an embodiment
  • FIG. 3 is a schematic diagram of another logical architecture of the medium access control sublayer and the physical layer in an embodiment
  • Figure 4 is a schematic diagram of a communication link determination process in an embodiment
  • FIG. 5 is a flowchart of another method for determining a communication link according to an embodiment
  • FIG. 6 is a flowchart of another method for determining a communication link provided by an embodiment
  • FIG. 7 is a schematic diagram of another communication link determination process in an embodiment
  • FIG. 8 is a schematic structural diagram of a communication link determination apparatus provided by an embodiment
  • Fig. 9 is a schematic structural diagram of a device provided by an embodiment.
  • the channel state of each communication link is constantly changing, and data transmission between each communication link is conflicted, resulting in poor reliability of multi-link communication.
  • a method for determining a communication link is provided. The channel state of each communication link is detected during the backoff process before wireless frame transmission, and the channel state change of each communication link is considered to determine the target. The communication link improves the reliability of multi-link communication.
  • Fig. 1 is a flowchart of a method for determining a communication link according to an embodiment.
  • the method for determining a communication link in this embodiment can be applied to a device that supports data transmission with another device through at least one communication link, for example, a data sending device.
  • the method provided in this embodiment includes step 110, step 120, and step 130.
  • step 110 a first set of communication links whose channel status is idle is determined from a set of communication links supported by the device.
  • the channel state of each communication link in the set of communication links supported by the device is detected, and when the channel state of at least one communication link is idle, the communication link whose channel state is idle is determined as The first set of communication links.
  • the set of communication links supported by the device consists of communication links supported by both the transceiver device.
  • step 120 the second communication link set is determined according to the channel state of the first communication link set within a preset time period.
  • the channel status of each communication link in the first communication link set within a preset time period is detected, and when there is at least one communication link whose channel status is idle within the preset time period , Determining the communication link whose channel status is idle within the preset time period as the second communication link set.
  • the preset time period in this embodiment may be an Arbitration Inter Frame Space (AIFS).
  • AIFS Arbitration Inter Frame Space
  • the communication link whose channel state is idle within the preset time period is used as the second communication link to start the backoff process.
  • step 130 the target communication link set for transmitting the wireless frame is determined according to the channel state of the second communication link set during the backoff process.
  • the backoff process includes a preset number of backoff time slots, and the communication links in the second communication link set whose channel state in each backoff time slot is idle constitute the final target communication link, and the target The communication link set may include one or more communication links.
  • the channel status is always idle and can be used to transmit wireless frames.
  • the wireless frames may be data frames, management frames, or control frames.
  • the network architecture of a wireless local area network (Wireless Local Area Networks, WLAN) consists of two types of equipment: access points (Access Point, AP) and stations (Station, STA). An access point and multiple sites form a basic service set (Basic Service Set, BSS). In this embodiment, both stations and access points are devices that support multiple communication links. Multiple communication links refer to multiple wireless communication links. For example, listen before talk (LBT) can be used. The communication link on the unlicensed frequency band of the mechanism.
  • LBT listen before talk
  • the idle channel assessment is performed on each communication link supported by the device through the carrier sense (Carrier Sense, CS) mechanism.
  • the carrier detection mechanism includes physical carrier detection and virtual carrier detection.
  • the physical carrier detection is provided by the physical layer (PHY), which receives signals through the PHY layer to perform idle channel assessment; the virtual carrier detection is declared by the time information carried in the wireless frame
  • PHY physical layer
  • the device uses the time information to update the local network allocation vector (Network Allocation Vector, NAV).
  • NAV Network Allocation Vector
  • the state of the channel is judged by physical carrier detection and virtual carrier detection. When the physical carrier detection is idle and NAV is equal to 0, the channel state is judged to be idle.
  • FIG. 2 is a schematic diagram of the logical architecture of the medium access control sublayer and the physical layer in an embodiment.
  • MAC Medium Access Control
  • Each PHY logical entity corresponds to the physical layer function of a communication link.
  • ML-EDCA Multi-Link Enhanced Distributed Channel Access
  • the multi-link enhanced distributed channel access function is an enhancement to the enhanced distributed channel access function, which enhances the channel access function of multiple communication links, and enhances the quality of service (QoS) function and distribution Type channel access remains consistent.
  • QoS quality of service
  • FIG. 3 is a schematic diagram of another logical architecture of the medium access control sublayer and the physical layer in an embodiment.
  • the MAC sublayer when the device supports multiple communication links, the MAC sublayer is divided into two logical modules: MAC-U and MAC-L.
  • MAC-L is a set of logic for each communication link. Function, and PHY one-to-one correspondence, and MAC-U is a logic function common to all communication links.
  • MAC-U there is an ML-EDCA to provide channel access functions for multiple communication links.
  • the architecture of the MAC sublayer and PHY sublayer of a device supporting multiple communication links may also exist in other forms.
  • an ML-EDCA function is also used to control the channel access of multiple communication links.
  • Fig. 4 is a schematic diagram of a communication link determination process in an embodiment.
  • the device supports communication link 1, communication link 2, and communication link 3.
  • the device After detecting the first communication link set (communication link 1 and communication link 2) whose channel status is idle, it waits Arbitrate the inter-frame interval, and detect the second communication link set (communication link 1 and communication link 2) whose channel status is idle within the arbitration inter-frame interval, then communication link 1 and communication link 2 start the backoff process,
  • the communication link whose channel status is idle in each backoff time slot is regarded as the final target communication link set.
  • the channel state of each communication link is detected during the backoff process before the wireless frame transmission, and the channel state change of each communication link is considered to determine the target communication link to ensure that the target communication link is transmitting data.
  • the channel state during the previous preset time period and the backoff process is always idle, which improves the reliability of multi-link communication.
  • the determining the second communication link set according to the channel state of the first communication link set within a preset time period includes: detecting that the first communication link set is in the The channel state within a preset time period; the second communication link set is determined according to the communication links in the first communication link set whose channel state is idle within the preset time period.
  • a communication link whose channel status is idle within the preset time period in the first communication link set is determined as the second communication link set.
  • the determining the target communication link set for transmitting the wireless frame according to the channel state of the second communication link set in the backoff process includes: according to the information in the second communication link set In the backoff process, the channel state of each backoff time slot is an idle communication link to determine the target communication link set.
  • a communication link whose channel state in each backoff time slot in the backoff process is idle is determined as the target communication link set for transmitting wireless frames.
  • the method further includes: in the case that no communication link with an idle channel state is detected within the preset time period, re-determining the channel state as idle in the set of communication links supported by the device The first set of communication links.
  • the channel states of the communication links in the first communication link set are all busy within the preset time period, and there is no idle communication link, it can be determined again in the communication link set supported by the device The first set of communication links whose channel status is idle.
  • the method further includes: in the case that no communication link with an idle channel state is detected in any backoff time slot in the backoff process, re-determining that the channel state is from the set of communication links supported by the device The first set of idle communication links.
  • each communication link in the set of communication links supported by the device includes a main channel and an auxiliary channel; the channel state is the channel state of the main channel corresponding to the communication link.
  • each communication link in the set of communication links supported by the device includes a primary channel (Primary Channel) and a secondary channel (Secondary Channel), and detecting the channel status for each communication link means detecting each communication link The channel status of the main channel of the road.
  • each communication link corresponds to a NAV, and NAV is bound to the main channel of the communication link, that is, the update of the NAV of each communication link is related to the signal of the main channel, and is related to other channels. The signal is irrelevant.
  • the actual data transmission bandwidth of each communication link supported by the device may or may not be the same.
  • the method further includes: determining according to the channel status of the primary channel and the secondary channel of each communication link in the target communication link set in a first set time period before the wireless frame transmission The transmission bandwidth of each communication link in the target communication link set.
  • the communication link is determined according to the secondary channel and the main channel whose channel state is idle in the first set time period before the wireless frame transmission The transmission bandwidth.
  • the method further includes: detecting the channel state of the third communication link set in a second set time period before the wireless frame transmission, the third communication link set and the target communication link
  • the union of the path sets is the set of communication links supported by the device; in the third communication link set, the communication links whose channel status is idle within the second set time period are added to the target communication link Road collection.
  • the communication link in the target communication link set is a communication link whose channel status is always idle since step 110, and the communication link in the third communication link set has a busy channel status in step 110. . If it is detected that the communication link in the third communication link set has changed to idle in the second set period of time before the wireless frame transmission after step 110, it can also be added to the target communication link set, It is used to transmit wireless frames, realize the expansion of the target communication link set, increase the transmission bandwidth and the number of communication links, and improve the transmission efficiency.
  • the method further includes: determining the target communication link according to the channel state of each communication link in the target communication link set during the first set time period before the wireless frame transmission The transmission bandwidth of each communication link in the set; adding the communication link in the third communication link set whose channel state is idle in the second set time period before the transmission of the wireless frame to the target communication link set, The union of the third communication link set and the target communication link set is the communication link set supported by the device; the duration of the first set time period is less than or equal to that of the second set time period duration.
  • the method further includes: determining the target communication link according to the channel state of each communication link in the target communication link set within a first set time period before the transmission of the wireless frame The transmission bandwidth of each communication link in the set; adding the communication link in the third communication link set whose channel state is idle in the second set time period before the transmission of the wireless frame to the target communication link set, The union of the third communication link set and the target communication link set is the communication link set supported by the device; the threshold for determining the channel state within the first set time period is greater than or equal to 2. The threshold for judging the channel state within the set time period.
  • the transmission bandwidth of each communication link in the target communication link set depends on whether the channel state of the communication link in the first set period of time before the wireless frame transmission is idle. In this case, it is determined
  • the threshold of the channel state is expressed as M1; whether the communication link in the third communication link set can be extended to the target communication link set for transmitting wireless frames depends on the second set time of the communication link before the wireless frame transmission Whether the channel state in the segment is idle, in this case, the threshold for determining the channel state is expressed as M2, and it satisfies: M1 ⁇ M2.
  • the method further includes: for each communication link, when the channel state is evaluated as idle through the physical layer, and the network allocation vector is determined to be 0 according to the time information carried in the wireless frame, determining all The channel state of the communication link is idle.
  • Fig. 5 is a flowchart of another method for determining a communication link provided by an embodiment. As shown in FIG. 5, the method provided in this embodiment includes step 210 to step 270.
  • a first communication link set whose channel status is idle is determined from among the communication link sets supported by the device.
  • step 220 the channel state of the first communication link set within a preset time period is detected.
  • the second communication link set is determined according to the communication links in the first communication link set whose channel status is idle within a preset time period.
  • step 240 if it is determined that there is an idle communication link within the preset time period, step 240 is continued to complete the random backoff process.
  • step 210 is re-executed to determine the first communication link with an idle channel status from the set of communication links supported by the device. Communication link collection.
  • the target communication link set is determined according to the communication links in the second communication link set in which the channel state of each backoff time slot in the backoff process is idle.
  • each backoff time slot in the backoff process it is determined that the channel state of the communication link from the beginning of the backoff process to the current backoff time slot is idle, then the backoff time slot counter is decremented, and step 240 is repeated until The backoff time slot counter becomes 0, and the communication link whose channel state is idle detected in the last backoff time slot constitutes the target communication link set, which can be used to send wireless frame transmission data.
  • the target communication link set is a subset of the communication link set supported by the device.
  • the channel status of each communication link in the second communication link set in each backoff time slot except the first backoff time slot, determine the previous backoff time
  • the slot channel is the channel state of an idle communication link in the current back-off time slot until a communication link that is idle in each back-off time slot is detected, and the target communication link set is obtained. If there is an idle communication link in each backoff time slot, the backoff time slot counter is decremented; if there is no idle communication link, the first communication link whose channel status is idle is determined again in the communication links supported by the device Road collection.
  • step 210 is re-executed, and the channel state is determined to be idle again in the set of communication links supported by the device.
  • the first set of communication links if a communication link with an idle channel state is not detected in any backoff time slot in the backoff process, step 210 is re-executed, and the channel state is determined to be idle again in the set of communication links supported by the device. The first set of communication links.
  • the premise for the device to start the back-off process is that the back-off process of the device is not started.
  • step 250 the channel state of the third communication link set in the second set time period before the wireless frame transmission is detected, and the union of the third communication link set and the target communication link set is the device The set of supported communication links.
  • step 260 from the third communication link set, the communication links whose channel status is idle within the second set time period are added to the target communication link set.
  • the channel state of the third communication link in step 210 is not idle (busy), but may change to the idle state after the first communication link set is determined. Therefore, through step 260 In step 270, the target communication link set can be expanded, so that the device can transmit data on a larger bandwidth and more communication links.
  • the target communication link set is determined according to the channel status of the primary channel and the secondary channel of each communication link in the target communication link set during the first set time period before the wireless frame transmission The transmission bandwidth of each communication link in.
  • step 260 is performed before step 270, or step 270 and step 260 are performed simultaneously, that is, the second set time period is greater than or equal to the first set time period.
  • the threshold for determining the channel state in step 270 is greater than or equal to the threshold for determining the channel state in step 260.
  • Fig. 6 is a flowchart of yet another method for determining a communication link provided by an embodiment. As shown in FIG. 6, the method provided in this embodiment includes step 21 to step 27.
  • step 21 the first communication link set whose channel status is idle is determined from the set of communication links supported by the device.
  • step 22 it is detected whether there is a communication link with an idle channel state in the first communication link set within a preset time period, and in response to a channel state in the first communication link set during the preset time period For the detection result of an idle communication link, step 23 is executed; in response to the detection result that there is no communication link with an idle channel state in the first communication link set within the preset time period, step 21 is executed again.
  • step 23 a second set of communication links is determined.
  • the communication links in the first communication link set whose channel status is idle within the preset time period are used as the second communication link set.
  • step 24 it is determined whether there is a communication link in the second communication link set in the backoff process whose channel statuses in the current backoff time slot and the previous backoff time slot are both idle, and in response to the second communication link in the backoff process, 2.
  • the communication link set there is a judgment result that the channel status of the current backoff time slot and the previous backoff time slot are both idle, and step 25 is executed; in response to the backoff process, in the second communication link set It is determined that there is no communication link in the current back-off time slot and the channel state of the previous back-off time slot is idle, and step 21 is performed again.
  • step 25 the back-off slot counter is decremented by one.
  • step 26 it is judged whether the back-off time slot counter is 0. In response to the judgment result that the back-off time slot counter is 0, step 27 is executed; in response to the judgment result that the back-off time slot counter is not 0, step 24 is continued, and the detection is continued.
  • the channel status of the current backoff time slot and the previous backoff time slot are both idle communication links.
  • step 27 a target communication link set for transmitting wireless frames is determined.
  • a communication link whose channel state in each backoff time slot in the backoff process is idle is used as the target communication link set.
  • the device supporting three communication links Take the device supporting three communication links as an example, which are communication link 1, communication link 2, and communication link 3, which correspond to NAV1, NAV2, and NAV3, respectively.
  • the working bandwidths of the three communication links are 160MHz and 80MHz respectively. , 80MHz.
  • the back-off slot counter is initialized, for example, the initial value of the back-off slot counter is 5.
  • the three communication links are evaluated for idle channels.
  • the backoff process is started on the communication link 1 and the communication link 2.
  • the channel status of each communication link in the first communication link set within the preset time period If the channel status is all busy, suspend the backoff process, re-determine the first communication link set and then start the backoff process; if If there is a communication link with an idle channel state, the backoff time slot decrement process in the backoff process is continued. For example, if it is judged that the channel status of the communication link 1 and the communication link 2 is idle within the preset time period, the channel status of the communication link 1 and the communication link 2 will be continuously detected during the decrementing process of the backoff time slot.
  • the communication link whose channel state is idle in each backoff time slot can be used as the final target communication link.
  • the backoff time slot counter is decremented by 1, and the idle communication link is continuously detected in the next backoff time slot, and this operation is repeated until the backoff time slot counter
  • the last backoff time slot detected is the communication link that is always idle during the backoff process, and the target communication link set is obtained. For example, if the channel status of the communication link 2 in the last backoff time slot is busy, then the communication link 1 is the target communication link set for data transmission. If it is detected that the channel status of all communication links is busy in any back-off time slot, the current back-off time slot counter is saved, and the back-off process is suspended.
  • the bandwidth of the communication link 1 that can be used to transmit wireless frames is determined by the following method: the bandwidth of the main channel of the communication link 1, and the channel status in the first set time period T1 before the communication link 1 transmits data It is the bandwidth of the idle secondary channel and the bandwidth that can be used to transmit wireless frames.
  • the target communication link set in addition to communication link 1, can also be expanded. Detect the channel state of the third communication link (ie communication link 2 and communication link 3 except the target communication link set in the above example) in the second set time period T2 before data transmission, and it will be in T2 The communication link whose channel state is idle is added to the target communication link set. For example, if the channel status of the communication link 3 in T2 is idle, the target communication link set may include communication link 3 in addition to communication link 1, and the device can transmit data through communication link 1 and communication link 3.
  • T1 ⁇ T2 in order to realize that the determined transmission bandwidth is the transmission bandwidth of each communication link (including the extended communication link) in the target communication link set.
  • T1 is 25us before data transmission
  • T2 is 34us or 43us before data transmission.
  • the threshold for determining whether the channel is busy or not in T1 is greater than or equal to the threshold for determining whether the channel is busy or not in T2.
  • the threshold for determining whether the channel is busy or not in T1 is -62dbm or -72dbm
  • the threshold for determining whether the channel is busy or not in T2 is -82dbm, which fully guarantees that the extended communication link is in an idle state and meets the demand for data transmission.
  • Fig. 7 is a schematic diagram of another communication link determination process in an embodiment.
  • the device supports communication link 1, communication link 2, and communication link 3. After detecting that the channel status of communication link 1 and communication link 2 is idle, it waits for the interval between arbitration frames. It is detected that the channel status of communication link 1 and communication link 2 is idle within the interval, then communication link 1 and communication link 2 start the backoff process, and the channel status in each backoff time slot is an idle communication link As the final target communication link.
  • the transmission bandwidth can be determined according to the main channel and the secondary channel whose channel status is idle; in the second set time period before the wireless frame transmission, the communication can be detected
  • the channel status of link 3 determines whether to extend the target communication link.
  • the communication link determination method of this embodiment judges the channel state based on the main channel, determines the transmission bandwidth based on the main channel and the auxiliary channel together, and uses the communication link whose channel state is always idle to transmit data, which fully guarantees the data transmission of multiple communication links. Reliability; In addition, by detecting the channel status of the third communication link set, the target communication link set is expanded, and the communication link and transmission bandwidth for transmitting data are increased, thereby improving communication efficiency; by configuring the first set time period The relationship with the second set time period ensures that the communication link that is ultimately used to transmit the wireless frame is in an idle state, and the transmission bandwidth of each communication link that can be used to transmit the wireless frame is determined, thereby further improving reliability.
  • FIG. 8 is a schematic structural diagram of a communication link determination apparatus provided by an embodiment.
  • the communication link determination device includes: a first link determination module 310, a second link determination module 320, and a target link determination module 330.
  • the first link determining module 310 is configured to determine the first communication link set whose channel status is idle among the communication link sets supported by the device; the second link determining module 320 is configured to determine the first communication link set according to the first communication link.
  • the channel state of the set in the preset time period determines the second communication link set; the target link determining module 330 is configured to determine the channel state for transmitting the wireless frame according to the channel state of the second communication link set in the backoff process Target communication link collection.
  • the communication link determination apparatus of this embodiment detects the channel state of each communication link during the backoff process before the wireless frame transmission, and takes into account the change of the channel state of each communication link, thereby determining the target communication link, and guarantees The channel state of the target communication link in the preset time period before data transmission and in the backoff process is always idle, which improves the reliability of multi-link communication.
  • the second link determining module 320 includes: a first detecting unit configured to detect the channel state of the first communication link set within a preset time period; and the link determining unit configured to be based on The communication links in the first communication link set whose channel status is idle within the preset time period determine the second communication link set.
  • the target link determining module 330 is configured to determine the communication link according to the idle communication link of each backoff time slot in the backoff process in the second communication link set. Target communication link collection.
  • it further includes: a first re-determination module, configured to re-enter the set of communication links supported by the device when no communication link with an idle channel state is detected within the preset time period Determine the first set of communication links whose channel status is idle.
  • a first re-determination module configured to re-enter the set of communication links supported by the device when no communication link with an idle channel state is detected within the preset time period Determine the first set of communication links whose channel status is idle.
  • it further includes: a second re-determining module, configured to re-set the communication link set supported by the device when no communication link whose channel state is idle is detected in any back-off time slot in the back-off process The first set of communication links in which the channel status is determined to be idle.
  • each communication link in the set of communication links supported by the device includes a main channel and an auxiliary channel; the channel state is the channel state of the main channel corresponding to the communication link.
  • it further includes: a bandwidth determining module, configured to determine the channel according to the primary channel and secondary channel of each communication link in the target communication link set in the first set time period before the wireless frame transmission Status, determining the transmission bandwidth of each communication link in the target communication link set.
  • a bandwidth determining module configured to determine the channel according to the primary channel and secondary channel of each communication link in the target communication link set in the first set time period before the wireless frame transmission Status, determining the transmission bandwidth of each communication link in the target communication link set.
  • it further includes: a non-target link detection module configured to detect the channel state of the third communication link set in a second set time period before the wireless frame transmission, the third communication link set The union with the target communication link set is the communication link set supported by the device; the expansion module is configured to set the channel state in the third communication link set to idle during the second set time period The communication link is added to the target communication link set.
  • a non-target link detection module configured to detect the channel state of the third communication link set in a second set time period before the wireless frame transmission, the third communication link set The union with the target communication link set is the communication link set supported by the device; the expansion module is configured to set the channel state in the third communication link set to idle during the second set time period The communication link is added to the target communication link set.
  • the duration of the first set time period is less than or equal to the duration of the second set time period.
  • the threshold for determining the channel state in the first set period of time is greater than or equal to the threshold for determining the channel state in the second set period of time.
  • the channel of the communication link is determined The state is idle.
  • the set of communication links supported by the device is a set of communication links supported by both parties of the data transceiver.
  • the communication link determination device proposed in this embodiment and the communication link determination method proposed in the above embodiments belong to the same inventive concept.
  • technical details not described in this embodiment in detail please refer to any of the above embodiments, and this embodiment has the same Perform the same effect as the communication link determination method.
  • the embodiment of the present application also provides a device.
  • the communication link determination method may be executed by a communication link determination device, and the communication link determination device may be implemented in software and/or hardware, and integrated in the device.
  • the device supports data transmission with another device through at least one communication link.
  • Fig. 9 is a schematic structural diagram of a device provided by an embodiment.
  • a device provided in this embodiment includes: a processor 410 and a storage device 420. There may be one or more processors in the device.
  • one processor 410 is taken as an example.
  • the processor 410 and the storage device 420 in the device may be connected through a bus or other methods.
  • FIG. Connect as an example.
  • the one or more programs are executed by the one or more processors 410, so that the one or more processors implement the communication link determination method described in any of the foregoing embodiments.
  • the storage device 420 in the device can be used to store one or more programs.
  • the programs can be software programs, computer-executable programs, and modules, as determined by the communication link in the embodiment of the present invention.
  • Program instructions/modules corresponding to the method include: a first link determination module 310, a second link determination module 320, and a target link determination module 330) .
  • the processor 410 executes various functional applications and data processing of the device by running software programs, instructions, and modules stored in the storage device 420, that is, implements the communication link determination method in the foregoing method embodiment.
  • the storage device 420 mainly includes a storage program area and a storage data area.
  • the storage program area can store an operating system and an application program required by at least one function; the storage data area can store data created according to the use of the device, etc. (as in the above embodiment)
  • the storage device 420 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the storage device 420 may further include a memory remotely provided with respect to the processor 410, and these remote memories may be connected to the device through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
  • the following operations are implemented: determine the first communication link whose channel status is idle in the set of communication links supported by the device Set; determine the second set of communication links according to the channel state of the first set of communication links within a preset time period; determine the second set of communication links according to the channel state of the second set of communication links in the backoff process for transmitting wireless frames The target communication link collection.
  • the device proposed in this embodiment and the communication link determination method proposed in the above embodiment belong to the same inventive concept.
  • this embodiment has a communication link with execution. Determine the effect of the same method.
  • the embodiment of the present application also provides a storage medium containing computer-executable instructions, and the computer-executable instructions are used to execute a communication link determination method when executed by a computer processor.
  • this application can be implemented by software and general-purpose hardware, and can also be implemented by hardware.
  • the technical solution of this application can be embodied in the form of a software product.
  • the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), and random access memory ( Random Access Memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including multiple instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute any of the embodiments described in this application method.
  • the block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions.
  • the computer program can be stored on the memory.
  • the memory can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as but not limited to read only memory (ROM), random access memory (RAM), optical storage devices and systems (digital multi-function optical discs) (Digital Versatile Disc, DVD) or compact disc (Compact Disc, CD)), etc.
  • Computer-readable media may include non-transitory storage media.
  • the data processor can be any type suitable for the local technical environment, such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (ASICs) ), programmable logic devices (Field Programmable Gate Array, FPGA), and processors based on multi-core processor architecture.
  • DSP Digital Signal Processors
  • ASICs application specific integrated circuits
  • FPGA Field Programmable Gate Array
  • processors based on multi-core processor architecture such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (ASICs) ), programmable logic devices (Field Programmable Gate Array, FPGA), and processors based on multi-core processor architecture.

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Abstract

本申请提供一种通信链路确定方法、装置、设备及存储介质，该方法包括：在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合；根据所述第一通信链路集合在预设时间段内的信道状态确定第二通信链路集合；根据所述第二通信链路集合在退避过程中的信道状态确定用于传输无线帧的目标通信链路集合。

Description

通信链路确定方法、装置、设备及存储介质
本申请要求在2019年09月27日提交中国专利局、申请号为201910926947.8的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信网络，例如涉及一种通信链路确定方法、装置、设备及存储介质。
背景技术
随着无线通信技术的发展和业务需求的快速增长，用户对无线通信的覆盖能力、服务质量、吞吐量的要求亦越来越高，多链路通信技术可以为设备提供更多的通信链路和更大的传输带宽，从而传输更多的数据，每个通信链路可以称为信道(Channel)，或者链接(Link)或者波段(Band)，利用信道状态为空闲的通信链路可以传输数据。每个通信链路的带宽是以该通信链路所在频带设定的基本带宽组成的。然而，在多通信链路的应用场景下，各通信链路的信道状态不断变化，各通信链路之间的数据传输存在冲突，导致多链路通信的可靠性较差。
发明内容
本申请提供一种通信链路确定方法、装置、设备及存储介质，以提高多链路通信的可靠性。
本申请实施例提供一种通信链路确定方法，包括：
在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合；
根据所述第一通信链路集合在预设时间段内的信道状态确定第二通信链路集合；
根据所述第二通信链路集合在退避过程中的信道状态确定用于传输无线帧的目标通信链路集合。
本申请实施例还提供了一种通信链路确定装置，包括：
第一链路确定模块，设置为在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合；
第二链路确定模块，设置为根据所述第一通信链路集合在预设时间段内的 信道状态确定第二通信链路集合；
目标链路确定模块，设置为根据所述第二通信链路集合在退避过程中的信道状态确定用于传输无线帧的目标通信链路集合。
本申请实施例还提供了一种设备，包括：
一个或多个处理器；
存储装置，用于存储一个或多个程序；
当所述一个或多个程序被所述一个或多个处理器执行，使得所述一个或多个处理器实现上述的通信链路确定方法。
本申请实施例还提供了一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，该计算机程序被处理器执行时实现上述的通信链路确定方法。
附图说明
图1为一实施例提供的一种通信链路确定方法的流程图；
图2为一实施例中的媒介接入控制子层和物理层的逻辑架构的示意图；
图3为一实施例中的媒介接入控制子层和物理层的另一逻辑架构的示意图；
图4为一实施例中的一种通信链路确定过程的示意图；
图5为一实施例提供的另一种通信链路确定方法的流程图；
图6为一实施例提供的又一种通信链路确定方法的流程图；
图7为一实施例中的另一种通信链路确定过程的示意图；
图8为一实施例提供的一种通信链路确定装置的结构示意图；
图9为一实施例提供的一种设备的结构示意图。
具体实施方式
下面结合附图和实施例对本申请进行说明。此处所描述的实施例仅仅用于解释本申请，而非对本申请的限定。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
在多链路通信的应用场景下，各通信链路的信道状态不断变化，各通信链路之间的数据传输存在冲突，导致多链路通信的可靠性较差。在本申请实施例中，提供一种通信链路确定方法，在无线帧传输之前的退避过程中检测每个通信链路的信道状态，考虑到每个通信链路的信道状态变化，从而确定目标通信 链路，提高多链路通信的可靠性。
图1为一实施例提供的一种通信链路确定方法的流程图。本实施例的通信链路确定方法可应用于支持与另一设备通过至少一个通信链路传输数据的设备，例如，数据的发送端设备。如图1所示，本实施例提供的方法包括步骤110、步骤120和步骤130。
在步骤110中，在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
本实施例中，检测设备所支持的通信链路集合中每个通信链路的信道状态，在至少一个通信链路的信道状态为空闲的情况下，将信道状态为空闲的通信链路确定为第一通信链路集合。设备所支持的通信链路集合由收发设备双方都支持的通信链路组成。
在步骤120中，根据所述第一通信链路集合在预设时间段内的信道状态确定第二通信链路集合。
本实施例中，检测第一通信链路集合中的每个通信链路在预设时间段内的信道状态，在存在至少一个通信链路在预设时间段内的信道状态为空闲的情况下，将在预设时间段内信道状态为空闲的通信链路确定为第二通信链路集合。本实施例中的预设时间段可以为一个仲裁帧间间隔(Arbitration Inter Frame Space，AIFS)。第一通信链路集合中在预设时间段内信道状态为空闲的通信链路作为第二通信链路开启退避过程。
在步骤130中，根据所述第二通信链路集合在退避过程中的信道状态确定用于传输无线帧的目标通信链路集合。
在一实施例中，退避过程包含预设数量个退避时隙，第二通信链路集合中的在每一个退避时隙的信道状态均为空闲的通信链路组成最终的目标通信链路，目标通信链路集合中可以包括一个或多个通信链路，在上述过程中的信道状态始终为空闲，可用于传输无线帧，无线帧可以为数据帧、管理帧或控制帧。
无线局域网(Wireless Local Area Networks，WLAN)的网络架构由两种类型的设备组成：接入点(Access Point，AP)和站点(Station，STA)。一个接入点和多个站点组成一个基本服务集(Basic Service Set，BSS)。本实施例中，站点和接入点都是支持多个通信链路的设备，多个通信链路指的是多个无线通信链路，例如是可以采用对话前监听(Listen before Talk，LBT)机制的非授权频段上的通信链路。
上述实施例中，通过载波检测(Carrier Sense，CS)机制对设备所支持的每个通信链路进行空闲信道评估。载波检测机制包括物理载波检测和虚拟载波检 测，物理载波检测由物理层(Physical Layer，PHY)提供，通过PHY层接收信号来进行空闲信道评估；虚拟载波检测通过无线帧中携带的时间信息来声明即将使用媒介的时间，设备使用该时间信息来更新本地的网络分配矢量(Network Allocation Vector，NAV)。通过物理载波检测和虚拟载波检测来判断信道的状态，在物理载波检测为空闲且NAV等于0的情况下，判断信道的状态为空闲。
图2为一实施例中的媒介接入控制子层和物理层的逻辑架构的示意图。如图2所示，设备支持多个通信链路的情况下，一个媒介接入控制(Medium Access Control，MAC)为多个PHY逻辑实体提供接入控制功能。每个PHY逻辑实体对应一个通信链路的物理层功能。在MAC逻辑实体中，存在一个多链路增强分布式信道接入(Multi-Link Enhanced Distributed Channel Access，ML-EDCA)来为多个通信链路提供信道接入功能。
多链路增强分布式信道接入功能是对增强分布式信道接入功能的增强，增强了多个通信链路信道接入功能，在服务质量(Quality of Service，QoS)功能上，和增强分布式信道接入保持一致。
图3为一实施例中的媒介接入控制子层和物理层的另一逻辑架构的示意图。如图3所示，设备支持多个通信链路的情况下，MAC子层分为两个逻辑模块：MAC-U和MAC-L，MAC-L是每个通信链路都有的一组逻辑功能，和PHY一一对应，而MAC-U是所有通信链路共有的一个逻辑功能。在MAC-U中，存在一个ML-EDCA来为多个通信链路提供信道接入功能。
在一些实施例中，支持多个通信链路的设备的MAC子层和PHY子层的架构可能还存在其他的形式。在其他形式的架构下，也是通过一个ML-EDCA功能来控制多个通信链路的信道接入。
图4为一实施例中的一种通信链路确定过程的示意图。如图4所示，设备支持通信链路1、通信链路2和通信链路3，检测到信道状态为空闲的第一通信链路集合(通信链路1和通信链路2)后，等待仲裁帧间间隔，在仲裁帧间间隔内检测到信道状态为空闲的第二通信链路集合(通信链路1和通信链路2)，则通信链路1和通信链路2开启退避过程，将在每一个退避时隙的信道状态均为空闲的通信链路作为最终的目标通信链路集合。
本实施例通过在无线帧传输之前的退避过程中检测每个通信链路的信道状态，考虑到每个通信链路的信道状态变化，从而确定目标通信链路，保证目标通信链路在传输数据前的预设时间段和退避过程中的信道状态始终为空闲，提高多链路通信的可靠性。
在一实施例中，所述根据所述第一通信链路集合在预设时间段内的信道状 态确定所述第二通信链路集合，包括：检测所述第一通信链路集合在所述预设时间段内的信道状态；根据所述第一通信链路集合中在所述预设时间段内的信道状态为空闲的通信链路确定所述第二通信链路集合。
本实施例中，将第一通信链路集合中在所述预设时间段内的信道状态为空闲的通信链路确定为第二通信链路集合。
在一实施例中，所述根据所述第二通信链路集合在退避过程中的信道状态确定用于传输无线帧的目标通信链路集合，包括：根据所述第二通信链路集合中在退避过程中的每个退避时隙的信道状态均为空闲的通信链路确定所述目标通信链路集合。
本实施例中，将第二通信链路集合中在退避过程中的每个退避时隙的信道状态均为空闲的通信链路确定为目标通信链路集合，用于传输无线帧。
在一实施例中，所述方法还包括：在所述预设时间段内未检测到信道状态为空闲的通信链路的情况下，重新在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
本实施例中，如果第一通信链路集合中的通信链路在预设时间段内的信道状态均为忙，不存在空闲的通信链路，可重新在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
在一实施例中，所述方法还包括：在退避过程中的任意退避时隙未检测到信道状态为空闲的通信链路的情况下，重新在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
本实施例中，如果在退避过程中的任意退避时隙，检测到上一个退避时隙为空闲的通信链路在当前退避时隙的信道状态均为忙，不存在空闲的通信链路，可重新在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
在一实施例中，所述设备支持的通信链路集合中的每个通信链路包括主信道和辅信道；所述信道状态为通信链路对应的主信道的信道状态。
本实施例中，设备支持的通信链路集合中的每个通信链路包括主信道(Primary Channel)和辅信道(Secondary Channel)，对每个通信链路检测信道状态是指检测每个通信链路的主信道的信道状态。本实施例中，每个通信链路都对应于一个NAV，且NAV与通信链路的主信道绑定，即，每个通信链路的NAV的更新和主信道的信号相关，和其他信道的信号无关。
在一实施例中，设备支持的每个通信链路实际可传输数据的带宽大小可以相同也可以不完全相同。
在一实施例中，所述方法还包括：根据所述目标通信链路集合中每个通信链路的主信道和辅信道在无线帧传输之前的第一设定时间段内的信道状态，确定所述目标通信链路集合中每个通信链路的传输带宽。
本实施例中，对于目标通信链路集合中的每个通信链路，根据其在无线帧传输前的第一设定时间段内信道状态为空闲的辅信道以及主信道来确定该通信链路的传输带宽。
在一实施例中，所述方法还包括：检测第三通信链路集合在无线帧传输之前的第二设定时间段内的信道状态，所述第三通信链路集合与所述目标通信链路集合的并集为设备支持的通信链路集合；将所述第三通信链路集合中，在所述第二设定时间段内信道状态为空闲的通信链路添加到所述目标通信链路集合。
本实施例中，目标通信链路集合中的通信链路是从步骤110开始信道状态始终为空闲的通信链路，而第三通信链路集合中的通信链路在步骤110中信道状态为忙。如果检测到第三通信链路集合中的通信链路在步骤110之后、且在无线帧传输之前的第二设定时间段内信道状态转变为空闲，则也可以添加至目标通信链路集合，用于传输无线帧，实现目标通信链路集合的扩展，增加传输带宽和通信链路的数量，提高传输效率。
在一实施例中，所述方法还包括：根据所述目标通信链路集合中每个通信链路在无线帧传输之前的第一设定时间段内的信道状态，确定所述目标通信链路集合中每个通信链路的传输带宽；将第三通信链路集合中在无线帧传输之前的第二设定时间段内信道状态为空闲的通信链路添加到所述目标通信链路集合，所述第三通信链路集合与所述目标通信链路集合的并集为设备支持的通信链路集合；所述第一设定时间段的时长小于或等于所述第二设定时间段的时长。
本实施例中，先根据第三通信链路集合在无线帧传输之前的第二设定时间段内的信道状态确定是否扩展目标通信链路集合，再根据目标通信链路集合中每个通信链路在无线帧传输之前的第一设定时间段内的信道状态，确定所述目标通信链路集合中每个通信链路的传输带宽。
在一实施例中，所述方法还包括：根据所述目标通信链路集合中每个通信链路在无线帧传输前的第一设定时间段内的信道状态，确定所述目标通信链路集合中每个通信链路的传输带宽；将第三通信链路集合中在无线帧传输之前的第二设定时间段内信道状态为空闲的通信链路添加到所述目标通信链路集合，所述第三通信链路集合与所述目标通信链路集合的并集为设备支持的通信链路集合；在所述第一设定时间段内判定信道状态的门限大于或等于在所述第二设定时间段内判定信道状态的门限。
本实施例中，目标通信链路集合中每个通信链路的传输带宽取决于该通信链路在无线帧传输之前的第一设定时间段内的信道状态是否为空闲，这种情况下判定信道状态的门限表示为M1；第三通信链路集合中的通信链路是否可扩展至目标通信链路集合用于传输无线帧取决于该通信链路在无线帧传输之前的第二设定时间段内的信道状态是否为空闲，这种情况下判定信道状态的门限表示为M2，则满足：M1≥M2。
在一实施例中，所述方法还包括：对于每个通信链路，在通过物理层评估信道状态为空闲，且根据无线帧中携带的时间信息确定网络分配矢量为0的情况下，判定所述通信链路的信道状态为空闲。
图5为一实施例提供的另一种通信链路确定方法的流程图。如图5所示，本实施例提供的方法包括步骤210至步骤270。
在步骤210中，在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
在步骤220中，检测所述第一通信链路集合在预设时间段内的信道状态。
在步骤230中，根据所述第一通信链路集合中在预设时间段内的信道状态为空闲的通信链路确定所述第二通信链路集合。
本实施例中，如果判断在预设时间段内有空闲的通信链路，则继续执行步骤240，完成随机退避过程。
在一实施例中，在预设时间段内未检测到信道状态为空闲的通信链路的情况下，重新执行步骤210，重新在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
在步骤240中，根据所述第二通信链路集合中在退避过程中的每个退避时隙的信道状态均为空闲的通信链路确定所述目标通信链路集合。
本实施例中，在退避过程中的每个退避时隙，判断存在通信链路从退避过程开始到当前退避时隙的信道状态都为空闲，则退避时隙计数器递减，重复执行步骤240，直到退避时隙计数器变为0，最后一个退避时隙检测到的信道状态为空闲的通信链路即构成目标通信链路集合，可用于发送无线帧传输数据。目标通信链路集合是设备支持的通信链路集合的子集。
在退避过程中的第一个退避时隙，判断第二通信链路集合中每个通信链路的信道状态；在除第一个退避时隙以外的每个退避时隙，判断上一个退避时隙信道为空闲的通信链路在当前退避时隙的信道状态，直到检测到每个退避时隙都空闲的通信链路，得到目标通信链路集合。在每个退避时隙中如果有空闲的通信链路，则退避时隙计数器递减；如果没有空闲的通信链路，则重新在设备 支持的通信链路中确定信道状态为空闲的第一通信链路集合。
在一实施例中，在退避过程中的任意退避时隙未检测到信道状态为空闲的通信链路的情况下，重新执行步骤210，重新在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
上述实施例中，设备开始退避过程的前提是设备的退避过程没有开启。
在步骤250中，检测第三通信链路集合在无线帧传输之前的第二设定时间段内的信道状态，所述第三通信链路集合与所述目标通信链路集合的并集为设备支持的通信链路集合。
在步骤260中，将所述第三通信链路集合中，在所述第二设定时间段内信道状态为空闲的通信链路添加到所述目标通信链路集合。
在一实施例中，允许检测第三通信链路在退避时隙计数器递减到0之前的第二设定时间段内的信道状态，第三通信链路为设备支持的通信链路中除目标通信链路集合以外的通信链路，第三通信链路在步骤210中的信道状态为非空闲(忙)，但是在确定第一通信链路集合之后可能又转变为空闲状态，因此，通过步骤260和步骤270，可以扩展目标通信链路集合，使设备可以在更大带宽、更多的通信链路上传输数据。
在步骤270中，根据所述目标通信链路集合中每个通信链路的主信道和辅信道在无线帧传输之前的第一设定时间段内的信道状态，确定所述目标通信链路集合中每个通信链路的传输带宽。
在一实施例中，在步骤270之前执行步骤260，或者同时执行步骤270和步骤260，即第二设定时间段大于或等于第一设定时间段。
在一实施例中，步骤270中判定信道状态的门限大于或等于步骤260中判定信道状态的门限。
图6为一实施例提供的又一种通信链路确定方法的流程图。如图6所示，本实施例提供的方法包括步骤21至步骤27。
在步骤21中，在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
在步骤22中，检测在预设时间段内，第一通信链路集合中是否有信道状态为空闲的通信链路，响应于在预设时间段内，第一通信链路集合中有信道状态为空闲的通信链路的检测结果，执行步骤23；响应于在预设时间段内，第一通信链路集合中没有信道状态为空闲的通信链路的检测结果，重新执行步骤21。
在步骤23中，确定第二通信链路集合。
本步骤中，将第一通信链路集合中在预设时间段内信道状态为空闲的通信链路作为第二通信链路集合。
在步骤24中，判断在退避过程中，第二通信链路集合中是否有在当前退避时隙以及之前的退避时隙的信道状态均为空闲的通信链路，响应于在退避过程中，第二通信链路集合中有在当前退避时隙以及之前的退避时隙的信道状态均为空闲的通信链路的判断结果，执行步骤25；响应于在退避过程中，第二通信链路集合中没有在当前退避时隙以及之前的退避时隙的信道状态均为空闲的通信链路的判断结果，重新执行步骤21。
在步骤25中，退避时隙计数器减1。
在步骤26中，判断退避时隙计数器是否为0，响应于退避时隙计数器为0的判断结果，执行步骤27；响应于退避时隙计数器不为0的判断结果，继续执行步骤24，继续检测当前退避时隙以及之前的退避时隙的信道状态均为空闲的通信链路。
在步骤27中，确定用于传输无线帧的目标通信链路集合。
本步骤中，将第二通信链路集合中在退避过程中的每个退避时隙的信道状态均为空闲的通信链路作为目标通信链路集合。
以设备支持三个通信链路为例，分别为通信链路1、通信链路2和通信链路3，分别对应于NAV1、NAV2、NAV3，三个通信链路的工作带宽分别为160MHz、80MHz、80MHz。在三个通信链路第一次竞争信道之前，初始化退避时隙计数器，例如退避时隙计数器的初始值为5。在第一次竞争信道的情况下，对三个通信链路进行空闲信道评估。例如，通信链路1和通信链路2对应的NAV都是0，且对应主信道的物理载波检测也是空闲，则判定通信链路1和通信链路2构成第一通信链路集合，共享同一个退避过程，在通信链路1和通信链路2开启退避过程。
在预设时间段内判断第一通信链路集合中每个通信链路的信道状态，如果信道状态都为忙，则挂起退避过程，重新确定第一通信链路集合再开启退避过程；如果存在信道状态为空闲的通信链路，则继续进行退避过程中的退避时隙递减过程。例如，在预设时间段内判断通信链路1和通信链路2的信道状态为空闲，则在退避时隙递减过程继续检测通信链路1和通信链路2的信道状态。
在退避时隙递减过程中每个退避时隙信道状态都为空闲的通信链路可作为最终的目标通信链路。在每一个退避时隙，如果存在通信链路的信道状态为空闲，则退避时隙计数器递减1，在下一个退避时隙继续对空闲的通信链路进行检测，重复该操作，直到退避时隙计数器变成0，最后一个退避时隙检测到的即为 在退避过程中始终空闲的通信链路，得到目标通信链路集合。例如，最后一个退避时隙通信链路2的信道状态为忙，则通信链路1即为目标通信链路集合，用于传输数据。如果在任意一个退避时隙中检测到所有通信链路的信道状态为忙，则保存当前的退避时隙计数器，挂起退避过程。
在上述示例中，通信链路1可用于传输无线帧的带宽由以下方法确定：通信链路1主信道的带宽，以及在通信链路1传输数据前的第一设定时间段T1内信道状态为空闲的辅信道的带宽，为可用于传输无线帧的带宽。
在上述示例中，除了通信链路1，还可扩展目标通信链路集合。检测第三通信链路(即上述示例中除目标通信链路集合以外的通信链路2和通信链路3)在传输数据前的第二设定时间段T2内的信道状态，将在T2内信道状态为空闲的通信链路加入目标通信链路集合。例如，在T2内通信链路3的信道状态为空闲，则目标通信链路集合除了通信链路1，还可以包括通信链路3，设备可通过通信链路1和通信链路3传输数据。
在一实施例中，T1≤T2，以实现确定的传输带宽是目标通信链路集合中的每个通信链路(包括扩展的通信链路)的传输带宽。例如，T1为传输数据前的25us，T2为传输数据前的34us或43us。
在一实施例中，在T1内判定信道忙闲的门限要大于或等于在T2内判定信道忙闲的门限。例如，T1内判断信道忙闲的门限为-62dbm或-72dbm，而在T2内判断信道忙闲的门限为-82dbm，充分保证扩展的通信链路为空闲状态，满足数据传输的需求。
图7为一实施例中的另一种通信链路确定过程的示意图。如图7所示，设备支持通信链路1、通信链路2和通信链路3，检测到通信链路1和通信链路2的信道状态为空闲后，等待仲裁帧间间隔，在仲裁帧间间隔内检测到通信链路1和通信链路2的信道状态为空闲，则通信链路1和通信链路2开启退避过程，在每一个退避时隙的信道状态均为空闲的通信链路作为最终的目标通信链路。此外，在无线帧传输之前的第一设定时间段内，根据主信道以及信道状态为空闲的辅信道可确定传输带宽；在无线帧传输之前的第二设定时间段内，可通过检测通信链路3的信道状态确定是否扩展目标通信链路。
本实施例的通信链路确定方法，基于主信道判断信道状态，基于主信道和辅信道共同确定传输带宽，利用信道状态始终为空闲的通信链路传输数据，充分保证多通信链路传输数据的可靠性；此外，通过检测第三通信链路集合的信道状态，对目标通信链路集合进行扩展，增加了传输数据的通信链路以及传输带宽，提高通信效率；通过配置第一设定时间段和第二设定时间段的关系，确保最终用于传输无线帧的通信链路为空闲状态，且确定每个可用于传输无线帧 的通信链路的传输带宽，进一步提高可靠性。
本申请实施例还提供一种通信链路确定装置。图8为一实施例提供的通信链路确定装置的结构示意图。如图8所示，所述通信链路确定装置包括：第一链路确定模块310、第二链路确定模块320和目标链路确定模块330。
第一链路确定模块310，设置为在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合；第二链路确定模块320，设置为根据所述第一通信链路集合在预设时间段内的信道状态确定第二通信链路集合；目标链路确定模块330，设置为根据所述第二通信链路集合在退避过程中的信道状态确定用于传输无线帧的目标通信链路集合。
本实施例的通信链路确定装置，通过在无线帧传输之前的退避过程中检测每个通信链路的信道状态，考虑到每个通信链路的信道状态变化，从而确定目标通信链路，保证目标通信链路在传输数据前的预设时间段和退避过程中的信道状态始终为空闲，提高多链路通信的可靠性。
在一实施例中，第二链路确定模块320，包括：第一检测单元，设置为检测所述第一通信链路集合在预设时间段内的信道状态；链路确定单元，设置为根据所述第一通信链路集合中在预设时间段内的信道状态为空闲的通信链路确定所述第二通信链路集合。
在一实施例中，目标链路确定模块330，是设置为：根据所述第二通信链路集合中在退避过程中的每个退避时隙的信道状态均为空闲的通信链路确定所述目标通信链路集合。
在一实施例中，还包括：第一重确定模块，设置为在所述预设时间段内未检测到信道状态为空闲的通信链路的情况下，重新在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
在一实施例中，还包括：第二重确定模块，设置为在退避过程中的任意退避时隙未检测到信道状态为空闲的通信链路的情况下，重新在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
在一实施例中，所述设备支持的通信链路集合中的每个通信链路包括主信道和辅信道；所述信道状态为通信链路对应的主信道的信道状态。
在一实施例中，还包括：带宽确定模块，设置为根据所述目标通信链路集合中每个通信链路的主信道和辅信道在无线帧传输之前的第一设定时间段内的信道状态，确定所述目标通信链路集合中每个通信链路的传输带宽。
在一实施例中，还包括：非目标链路检测模块，设置为检测第三通信链路集合在无线帧传输之前的第二设定时间段内的信道状态，所述第三通信链路集 合与所述目标通信链路集合的并集为设备支持的通信链路集合；扩展模块，设置为将所述第三通信链路集合中，在所述第二设定时间段内信道状态为空闲的通信链路添加到所述目标通信链路集合。
在一实施例中，第一设定时间段的时长小于或等于所述第二设定时间段的时长。
在一实施例中，在第一设定时间段内判定信道状态的门限大于或等于在第二设定时间段内判定信道状态的门限。
在一实施例中，对于每个通信链路，在通过物理层评估信道状态为空闲，且根据无线帧中携带的时间信息确定网络分配矢量为0的情况下，判定所述通信链路的信道状态为空闲。
在一实施例中，所述设备支持的通信链路集合为数据收发双方都支持的通信链路集合。
本实施例提出的通信链路确定装置与上述实施例提出的通信链路确定方法属于同一发明构思，未在本实施例中详尽描述的技术细节可参见上述任意实施例，并且本实施例具备与执行通信链路确定方法相同的效果。
本申请实施例还提供一种设备。所述通信链路确定方法可以由通信链路确定装置执行，该通信链路确定装置可以通过软件和/或硬件的方式实现，并集成在所述设备中。所述设备支持与另一设备通过至少一个通信链路传输数据。
图9为一实施例提供的一种设备的结构示意图。如图9所示，本实施例提供的一种设备，包括：处理器410和存储装置420。该设备中的处理器可以是一个或多个，图9中以一个处理器410为例，所述设备中的处理器410和存储装置420可以通过总线或其他方式连接，图9中以通过总线连接为例。
所述一个或多个程序被所述一个或多个处理器410执行，使得所述一个或多个处理器实现上述任一实施例所述的通信链路确定方法。
该设备中的存储装置420作为一种计算机可读存储介质，可用于存储一个或多个程序，所述程序可以是软件程序、计算机可执行程序以及模块，如本发明实施例中通信链路确定方法对应的程序指令/模块(例如，附图8所示的通信链路确定装置中的模块，包括：第一链路确定模块310、第二链路确定模块320和目标链路确定模块330)。处理器410通过运行存储在存储装置420中的软件程序、指令以及模块，从而执行设备的各种功能应用以及数据处理，即实现上述方法实施例中的通信链路确定方法。
存储装置420主要包括存储程序区和存储数据区，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据设备的使用所创 建的数据等(如上述实施例中的第一通信链路集合、第二通信链路集合等)。此外，存储装置420可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实例中，存储装置420可进一步包括相对于处理器410远程设置的存储器，这些远程存储器可以通过网络连接至设备。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
并且，当上述设备中所包括一个或者多个程序被所述一个或者多个处理器410执行时，实现如下操作：在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合；根据所述第一通信链路集合在预设时间段内的信道状态确定第二通信链路集合；根据所述第二通信链路集合在退避过程中的信道状态确定用于传输无线帧的目标通信链路集合。
本实施例提出的设备与上述实施例提出的通信链路确定方法属于同一发明构思，未在本实施例中详尽描述的技术细节可参见上述任意实施例，并且本实施例具备与执行通信链路确定方法相同的效果。
本申请实施例还提供一种包含计算机可执行指令的存储介质，计算机可执行指令在由计算机处理器执行时用于执行一种通信链路确定方法。
通过以上关于实施方式的描述，本申请可借助软件及通用硬件来实现，也可以通过硬件实现。本申请的技术方案可以以软件产品的形式体现出来，该计算机软件产品可以存储在计算机可读存储介质中，如计算机的软盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、闪存(FLASH)、硬盘或光盘等，包括多个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)执行本申请任意实施例所述的方法。
以上所述，仅为本申请的示例性实施例而已，并非用于限定本申请的保护范围。
本申请附图中的任何逻辑流程的框图可以表示程序步骤，或者可以表示相互连接的逻辑电路、模块和功能，或者可以表示程序步骤与逻辑电路、模块和功能的组合。计算机程序可以存储在存储器上。存储器可以具有任何适合于本地技术环境的类型并且可以使用任何适合的数据存储技术实现，例如但不限于只读存储器(ROM)、随机访问存储器(RAM)、光存储器装置和系统(数码多功能光碟(Digital Versatile Disc，DVD)或光盘(Compact Disc，CD))等。计算机可读介质可以包括非瞬时性存储介质。数据处理器可以是任何适合于本地技术环境的类型，例如但不限于通用计算机、专用计算机、微处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific  Integrated Circuit，ASIC)、可编程逻辑器件(Field Programmable Gate Array，FPGA)以及基于多核处理器架构的处理器。

Claims (15)

  1. 一种通信链路确定方法，包括：
    在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合；
    根据所述第一通信链路集合在预设时间段内的信道状态确定第二通信链路集合；
    根据所述第二通信链路集合在退避过程中的信道状态确定用于传输无线帧的目标通信链路集合。
  2. 根据权利要求1所述的方法，其中，所述根据所述第一通信链路集合在预设时间段内的信道状态确定所述第二通信链路集合，包括：
    检测所述第一通信链路集合在所述预设时间段内的信道状态；
    根据所述第一通信链路集合中在所述预设时间段内的信道状态为空闲的通信链路确定所述第二通信链路集合。
  3. 根据权利要求1所述的方法，其中，所述根据所述第二通信链路集合在退避过程中的信道状态确定用于传输无线帧的目标通信链路集合，包括：
    根据所述第二通信链路集合中在退避过程中的每个退避时隙的信道状态均为空闲的通信链路确定所述目标通信链路集合。
  4. 根据权利要求2所述的方法，还包括：
    在所述预设时间段内未检测到信道状态为空闲的通信链路的情况下，重新在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
  5. 根据权利要求3所述的方法，还包括：
    在退避过程中的任意退避时隙未检测到信道状态为空闲的通信链路的情况下，重新在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合。
  6. 根据权利要求1所述的方法，其中，所述设备支持的通信链路集合中的每个通信链路包括主信道和辅信道；
    所述信道状态为通信链路对应的主信道的信道状态。
  7. 根据权利要求6所述的方法，还包括：
    根据所述目标通信链路集合中每个通信链路的主信道和辅信道在无线帧传输之前的第一设定时间段内的信道状态，确定所述目标通信链路集合中每个通信链路的传输带宽。
  8. 根据权利要求1所述的方法，还包括：
    检测第三通信链路集合在无线帧传输之前的第二设定时间段内的信道状态，所述第三通信链路集合与所述目标通信链路集合的并集为所述设备支持的通信链路集合；
    将所述第三通信链路集合中，在所述第二设定时间段内信道状态为空闲的通信链路添加到所述目标通信链路集合。
  9. 根据权利要求1所述的方法，还包括：
    根据所述目标通信链路集合中每个通信链路在无线帧传输之前的第一设定时间段内的信道状态，确定所述目标通信链路集合中每个通信链路的传输带宽；
    将第三通信链路集合中在无线帧传输之前的第二设定时间段内信道状态为空闲的通信链路添加到所述目标通信链路集合，所述第三通信链路集合与所述目标通信链路集合的并集为设备支持的通信链路集合；
    其中，所述第一设定时间段的时长小于或等于所述第二设定时间段的时长。
  10. 根据权利要求1所述的方法，还包括：
    根据所述目标通信链路集合中每个通信链路在无线帧传输前的第一设定时间段内的信道状态，确定所述目标通信链路集合中每个通信链路的传输带宽；
    将第三通信链路集合中在无线帧传输之前的第二设定时间段内信道状态为空闲的通信链路添加到所述目标通信链路集合，所述第三通信链路集合与所述目标通信链路集合的并集为设备支持的通信链路集合；
    其中，在所述第一设定时间段内判定信道状态的门限大于或等于在所述第二设定时间段内判定信道状态的门限。
  11. 根据权利要求1-10任一项所述的方法，还包括：
    对于每个通信链路，在通过物理层评估信道状态为空闲，且根据无线帧中携带的时间信息确定网络分配矢量为0的情况下，判定所述通信链路的信道状态为空闲。
  12. 根据权利要求1-10任一项所述的方法，其中，所述设备支持的通信链路集合为数据收发双方都支持的通信链路集合。
  13. 一种通信链路确定装置，包括：
    第一链路确定模块，设置为在设备支持的通信链路集合中确定信道状态为空闲的第一通信链路集合；
    第二链路确定模块，设置为根据所述第一通信链路集合在预设时间段内的信道状态确定第二通信链路集合；
    目标链路确定模块，设置为根据所述第二通信链路集合在退避过程中的信道状态确定用于传输无线帧的目标通信链路集合。
  14. 一种设备，包括：
    至少一个处理器；
    存储装置，设置为存储至少一个程序；
    当所述至少一个程序被所述至少一个处理器执行，使得所述至少一个处理器实现如权利要求1-10中任一项所述的通信链路确定方法。
  15. 一种计算机可读存储介质，存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1-10中任一项所述的通信链路确定方法。
PCT/CN2020/118159 2019-09-27 2020-09-27 通信链路确定方法、装置、设备及存储介质 WO2021057979A1 (zh)

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