CN113438683A - Multilink data transmission method, station, access point and readable storage medium - Google Patents

Multilink data transmission method, station, access point and readable storage medium Download PDF

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Publication number
CN113438683A
CN113438683A CN202010208325.4A CN202010208325A CN113438683A CN 113438683 A CN113438683 A CN 113438683A CN 202010208325 A CN202010208325 A CN 202010208325A CN 113438683 A CN113438683 A CN 113438683A
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link
data
txop
station
data transmission
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CN113438683B (en
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赵育仁
徐彦超
余庆华
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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Priority to PCT/CN2021/076208 priority patent/WO2021190193A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
    • 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
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A multilink data transmission method, a station, an access point and a readable storage medium are provided. The method is suitable for data transmission between two devices which do not support multilink simultaneous transmission and reception, and comprises the following steps: monitoring a channel state corresponding to a second link within the duration of transmitting the opportunity TXOP on the first link; and when the channel corresponding to the second link is monitored to be in an idle state, starting data transmission synchronous with the first link on the second link. By applying the scheme, the channel utilization rate can be effectively improved.

Description

Multilink data transmission method, station, access point and readable storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a multilink data transmission method, a station, an access point, and a readable storage medium.
Background
In a Wireless Local Area Network (WLAN), ieee802.11be standard in the discussion system includes the standard formulation of a multilink system, and an entity device may include a plurality of Stations (STAs), and the STAs respectively correspond to different Physical layers (Physical layers) but correspond to the same Media Access Control (MAC) Layer. An entity device may also include multiple Access Points (APs), where the APs correspond to different physical layers but the same MAC layer. Multiple links can be established between the entity equipment with multiple STAs and the entity equipment with multiple APs, and multi-link data transmission is realized.
Two entity devices establishing a multilink are both devices supporting multilink Simultaneous Transmission and Reception (STR) if data can be transmitted on one of the links and received on the other link. If data cannot be received on other links while data is being transmitted on one of the links, or data cannot be transmitted on other links while data is being received on one of the links, both of the two devices are devices that do not support multi-link Simultaneous transmission and reception (none STR), or at least one device is a none STR.
At present, for a device which does not support simultaneous transmission and reception on a multi-link, when data transmission is performed, the channel utilization rate is low.
Disclosure of Invention
The invention aims to solve the problem of how to improve the channel utilization rate when data transmission is carried out on two devices which do not support multilink simultaneous transmission and reception.
To solve the above problem, an embodiment of the present invention provides a multilink data transmission method, which is suitable for data transmission between two multilink devices that do not support multilink simultaneous transmission and reception, and includes: monitoring a channel state corresponding to a second link within the duration of transmitting the opportunity TXOP on the first link; and when the channel corresponding to the second link is monitored to be in an idle state, starting data transmission synchronous with the first link on the second link.
Optionally, the monitoring, in the duration of the transmission of the opportunistic TXOP on the first link, a channel state corresponding to the second link includes: and monitoring the channel state corresponding to the second link in the non-transmission time before the corresponding data on the first link is transmitted.
Optionally, the monitoring a channel state corresponding to the second link includes: and when the channel corresponding to the second link is continuously idle within a preset fixed time length or a random time length, judging that the channel corresponding to the second link is in an idle state.
Optionally, when it is monitored that a channel corresponding to the second link is idle, starting data transmission synchronized with the first link on the second link includes: and when the channel corresponding to the second link is monitored to be idle, the channel is used as the holder of the TXOP of the second link, and data transmission synchronous with the first link is started on the second link.
Optionally, the initiating, as a holder of the second link TXOP, data transmission synchronized with the first link on the second link comprises: acquiring the duration information of the TXOP on the first link; and sending the duration information of the TXOP on the first link through the data sent for the first time.
Optionally, the holder of the TXOP on the second link is an access point AP corresponding to the second link; or the holder of the TXOP on the second link is a station STA corresponding to the second link.
Optionally, the holder of the TXOP on the first link is a station STA corresponding to the first link; or, the holder of the TXOP on the first link is an access point AP corresponding to the first link.
Optionally, a frame structure of data transmitted on the second link is different from a frame structure of data transmitted on the first link.
Optionally, the data transmitted on the first link or the second link is single-user data or multi-user data.
Optionally, the data transmitted on the first link or the second link is aggregated data or concatenated data.
The embodiment of the present invention further provides a station, which is integrated in a multi-link device that does not support multi-link simultaneous transmission and reception, and the station includes:
the first channel state monitoring unit is suitable for monitoring the channel state of a second link corresponding to the station in the duration of sending the opportunity TXOP on the first link;
and the first data transmission unit is suitable for starting data transmission synchronous with the first link on the second link when the channel corresponding to the second link is monitored to be in an idle state.
Optionally, the first channel state monitoring unit is adapted to monitor a channel state corresponding to the second link within a non-transmission time before the corresponding data on the first link is transmitted.
Optionally, the first channel state monitoring unit is adapted to determine that a channel corresponding to the second link is in an idle state when the channel corresponding to the second link is continuously idle for a preset fixed time or a preset random time.
Optionally, the first data transmission unit is adapted to, when it is monitored that a channel corresponding to the second link is idle, start, as a holder of the TXOP of the second link, data transmission synchronized with the first link on the second link.
Optionally, the first data transmission unit includes: a first obtaining subunit, adapted to obtain duration information of the TXOP on the first link; and the first sending subunit is suitable for sending the duration information of the TXOP on the first link through the data sent for the first time.
Optionally, a frame structure of data transmitted on the second link is different from a frame structure of data transmitted on the first link.
Optionally, the data transmitted on the first link or the second link is single-user data or multi-user data.
Optionally, the data transmitted on the first link or the second link is aggregated data or concatenated data.
The embodiment of the present invention further provides an access point, which is integrated in a multilink device that does not support multilink simultaneous transmission and reception, and the access point includes:
a second channel state monitoring unit, adapted to monitor a channel state of a second link corresponding to the access point within a duration of transmitting the opportunity TXOP on the first link;
and the second data transmission unit is suitable for starting data transmission synchronous with the first link on the second link when the channel corresponding to the second link is monitored to be in an idle state.
Optionally, the second channel state monitoring unit is adapted to monitor a channel state corresponding to the second link in a non-transmission time before the corresponding data on the first link is transmitted.
Optionally, the second channel state monitoring unit is adapted to determine that a channel corresponding to the second link is in an idle state when the channel corresponding to the second link is continuously idle for a preset fixed time or a preset random time.
Optionally, the second data transmission unit is adapted to, when it is monitored that a channel corresponding to the second link is idle, start, as a holder of the TXOP of the second link, data transmission synchronized with the first link on the second link.
Optionally, the second data transmission unit includes: a second obtaining subunit, adapted to obtain duration information of the TXOP on the first link; and the second sending subunit is suitable for sending the duration information of the TXOP on the first link through the data sent for the first time.
Optionally, a frame structure of data transmitted on the second link is different from a frame structure of data transmitted on the first link.
Optionally, the data transmitted on the first link or the second link is single-user data or multi-user data.
Optionally, the data transmitted on the first link or the second link is aggregated data or concatenated data.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of any one of the methods described above.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following advantages:
by adopting the scheme, the channel state corresponding to the second link is monitored in the duration of the TXOP on the first link, and once the channel corresponding to the second link is idle, the data transmission synchronous with the first link is started on the second link. Compared with the prior art, the method can only perform synchronous data transmission on the second link with the idle channel at the starting moment of the TXOP on the first link, and can perform synchronous data transmission as long as the second link is idle in the duration of the TXOP on the first link, thereby effectively improving the utilization rate of the channel.
Drawings
FIG. 1 is a schematic diagram of data transmission between two devices that do not support multilink simultaneous transmission and reception;
FIG. 2 is a flow chart of a method for multilink data transmission according to an embodiment of the present invention;
fig. 3 is a schematic diagram of data transmission between two devices that do not support multilink simultaneous transmission and reception according to an embodiment of the present invention;
fig. 4 is another schematic diagram of data transmission between two devices that do not support multilink simultaneous transmission and reception according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating another embodiment of data transmission between two devices that do not support multilink simultaneous transmission and reception;
FIG. 6 is a schematic diagram of a station according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an access point in an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic diagram of a device that does not support multilink simultaneous transmission and reception of data between two devices. Taking two links established between two devices as an example, a first link1 between the first station STA1 and the first access point AP1 and a second link2 between the second station STA2 and the second access point AP2 are provided.
As shown in fig. 1, in the prior art, it is assumed that first station STA1 is the holder of a Transmission Opportunity (TXOP) on first link1, that is, on first link1, first station STA1 first transmits data to first access point AP 1.
Before the start time t0 of the TXOP, if the second station STA2 monitors that the channel corresponding to the second link2 is idle, the second station STA2, as the holder of the TXOP on the second link2, may start data transmission synchronized with the first link1 on the second link 2.
For example, the first station STA1 sends a first Request To Send (RTS) frame RTS1 To the first access point AP1 at time t0, and the second station STA2 also sends a second Request To Send frame RTS2 To the second access point AP2 at time t 0.
The first access point AP1 transmits a first Clear To Send (CTS) frame CTS1 to the first station STA1 at time t1, the first CTS1 being a response frame to the first request to send frame RTS 1. The second access point AP2 also transmits a second clear to send frame CTS2 to the second station STA2 at time t1, the second clear to send frame CTS2 being a response frame to the second request to send frame RTS 2. The time interval between the first clear to send frame CTS1 and the first request to send frame RTS1 and the time interval between the second clear to send frame CTS2 and the second request to send frame RTS2 are Short Interframe Space (SIFS).
Thereafter, when the first station STA1 transmits the data Date1 to the first access point AP1, the second station STA2 also transmits the data Date2 to the second access point AP2 at the same time. While the first access point AP1 transmits a response ACK1 with respect to the data Date1 to the first station STA1, the second access point AP2 also transmits a response ACK2 with respect to the data Date2 to the second station STA2 at the same time.
When the first station STA1 transmits data Date3 to the first access point AP1, the second station STA2 also transmits data Date4 to the second access point AP2 at the same time. While the first access point AP1 transmits a response ACK3 with respect to the data Date3 to the first station STA1, the second access point AP2 also transmits a response ACK4 with respect to the data Date4 to the second station STA2 at the same time.
However, at the start time t0 of the TXOP, if the channel corresponding to the second link2 is busy, the second link2 cannot perform data transmission synchronized with the first link1 during the duration of the TXOP, which results in a decrease in the channel utilization rate of the second link, and this disadvantage is more significant when there are more links established between two devices.
To this end, an embodiment of the present invention provides a multilink data transmission method, where in the method, a channel state corresponding to a second link is continuously monitored during a duration of a TXOP on a first link, and once a channel corresponding to the second link is idle, data transmission synchronized with the first link is started on the second link, so that a channel utilization rate can be effectively improved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 2, an embodiment of the present invention provides a multilink data transmission method, which is suitable for data transmission between two devices that do not support multilink simultaneous transmission and reception. That is to say, for two non STR multilink devices, the multilink data transmission method in the embodiment of the present invention may be adopted to perform data transmission. In particular, the method may comprise the steps of:
and step 21, monitoring a channel state corresponding to the second link within the duration of the opportunity TXOP sent on the first link.
In the embodiment of the present invention, only two links may be established between two non STR multi-link devices, or three or more links may be established. The first link is any one of a plurality of links established between two non STR multi-link devices. When data transmission is carried out on any link established between two non STR multi-link devices, the channel states corresponding to other links are monitored. Wherein, any one of the other links except the first link is the second link. At this time, the number of the second links may be only one, or may be two or more.
Specifically, taking two devices for multilink data transmission as a device a and a device B respectively as an example:
in an embodiment, the device a and the device B may both be dual-link non STR devices, and two links, which are a link1 and a link2, are established between the device a and the device B. The first link is one of the links, and the second link is the other link.
In another embodiment, the device a and the device B may both be three-link non STR devices, and three links are established between the device a and the device B, which are link1, link2, and link3 respectively. The first link is one of the links, and the second link may be the other two links.
In another embodiment, device a is a dual link non STR device, and device B is a three link hybrid device, where two links are in a non STR relationship with each other, and the third link can perform STR operation. Two links, namely a link1 and a link2, are established between two non STR links of the device a and the device B, the first link is one of the links, and the second link is the other link.
In another embodiment, the device a is a dual link non STR device, the device B is a dual link STR device, two links, namely, a link1 and a link2, are established between the device a and the device B, where the first link is one of the links, and the second link is the other link. On the first link, the station competes with the access point for the channel to obtain the TXOP. On the first link, the holder of the TXOP may be an STA or an AP, and is not limited in particular. Regardless of which party the holder of the TXOP is on the first link, the channel state corresponding to the second link is monitored for the duration of the TXOP. Wherein the channel state corresponding to the second link includes: the channel is in an idle state, namely the channel corresponding to the current second link does not transmit data; and a busy state of the channel, that is, the channel corresponding to the current second link is transmitting data. Whether there is data transmission in the Channel may be determined according to a measurement result of Clear Channel Assessment (CCA), and in an embodiment, the threshold (threshold) of Energy Detection (ED) may be the same as the threshold of Carrier Sensing (CS).
On the second link, the station or the access point may monitor a channel state corresponding to the second link in a non-transmission time before the corresponding data is transmitted on the first link. On the second link, the holder of the TXOP may be either a STA or an AP. The non-transmission time before the corresponding data on the first link is transmitted includes the transmission time of the non-corresponding data on the first link and the interval time between the non-corresponding data and the corresponding data.
In a specific implementation, the channel status of the second link may be monitored in various ways, and is not particularly limited as long as the channel monitoring result is obtained.
In an embodiment of the present invention, in a non-transmission time before the corresponding data is transmitted on the first link, if the channel corresponding to the second link is continuously idle within a preset fixed time or a random time, it is determined that the channel corresponding to the second link is in an idle state. The fixed duration may be preset or set according to actual conditions.
And step 22, when the channel corresponding to the second link is idle, performing data transmission on the second link in synchronization with the first link.
In a specific implementation, when it is monitored that a channel corresponding to the second link is idle, the channel is used as a holder of the TXOP of the second link, and data transmission synchronized with the first link is started on the second link. For example, when the station of the second link monitors that a channel corresponding to the second link is idle, the station of the second link is the holder of the TXOP of the second link, and starts synchronous data transmission. And when the access point of the second link monitors that the channel corresponding to the second link is idle, the access point of the second link is the holder of the TXOP of the second link, and synchronous data transmission is started.
The following is described in detail with reference to fig. 3 and 4:
referring to fig. 3, the holder of the TXOP on the first link1 is the first station STA1, and at the start time t0 of the TXOP on the first link1, other data is being transmitted on the second link 2.
In the same device, when the first station STA1 transmits data, the channel state of the second link2 is monitored by the second station STA2, and the obtained monitoring result is unreliable. Similarly, in the same device, when the first access point AP1 transmits data, the second access point AP2 monitors the channel status of the second link2, and the monitoring result is not reliable.
Therefore, in order to improve reliability of the monitoring result, when the first station STA1 transmits data, the channel state of the second link2 should be monitored by the second access point AP2, and when the first access point AP1 transmits data, the channel state of the second link2 should be monitored by the second station STA 2.
The corresponding Data of the second station STA2 of the second link2 on the first link are Data RTS1, Data1 and Data 2. The corresponding data on the first link for the second access point AP2 of the second link2 are CTS1, ACK1, and ACK 2.
When the transmission of other Data occupying the second link2 is finished, Data1 is transmitted corresponding to the first station STA1 on the first link, and at this time, the channel state of the second link2 is monitored by the second access point AP2 of the second link 2. Before the first access point AP1 sends the ACK1 on the first link, if the second access point AP2 monitors that the second link channel is in an idle state, the second access point AP2 serves as a holder of the second link TXOP, starts synchronous data transmission, and sends the ACK2 to the second station STA 2. The ACK2 may actually be in other data formats, but should be synchronized with the start and end times of ACK 1.
Referring to fig. 4, when the transmission of other data occupying the second link2 is finished, the corresponding second access point AP2 on the first link transmits a data CTS1, and at this time, the second station STA2 of the second link2 should monitor the channel state of the second link 2. Before the first station STA1 sends Data1 on the first link, if the second station STA2 monitors that the second link channel is in an idle state, the second station STA2 serves as a holder of the second link TXOP, starts synchronous Data transmission, and sends Data2 to the second access point AP 2.
In an embodiment of the present invention, the holder of the TXOP on the second link may first obtain the duration information of the TXOP on the first link, and then transmit the duration information of the TXOP on the first link through the first transmitted data, so as to perform data transmission on the second link that is synchronous with the first link.
For example, in fig. 3, the second access point AP2, as the holder of the TXOP of the second link, carries the duration information of the TXOP on the first link in the ACK2 that is first sent to the second access point STA 2. In fig. 4, the second station STA2, as a holder of the TXOP of the second link, carries the duration information of the TXOP on the first link in the Data2 that is first transmitted to the second access point AP 2.
Specifically, the holder of the TXOP on the second link may set the duration information of the TXOP on the first link in a MAC header of first-time transmission data. The first-time transmitted data refers to first-time transmitted data when the second link performs synchronous transmission with the first link in a channel idle state of the second link.
In a specific implementation, multiple methods may be adopted to obtain the duration information of the TXOP on the first link, and when the holder of the TXOP on the second link is a station, the station of the second link may obtain the duration information of the TXOP on the first link by communicating with the station of the first link in the same device. When the holder of the TXOP on the second link is an access point, the access point of the second link may obtain the duration information of the TXOP on the first link by communicating with the access point of the first link in the same device. The duration information of the TXOP on the first link may also be obtained by other modules of the device.
In a specific implementation, after the holder of the TXOP on the second link starts the synchronous data transmission, the second access point STA2 should acquire the transmission time of the corresponding data on the first link in advance before transmitting the data each time, including the transmission start time and the transmission end time. Similarly, the second access point AP2 should also obtain the transmission time of the corresponding data on the first link in advance before transmitting the data each time.
For example, in fig. 3, after the second access point AP2 is used as the holder of the second link TXOP and starts synchronous data transmission, the start time and end time information of the ACK2 is obtained, and then the ACK2 is sent to the second station STA 2. The transmission end time of the ACK2 is the same as the transmission end time of the ACK1 transmitted by the first access point AP1 to the first station STA1 on the first link 1.
It is to be appreciated that, before time t2, the first access point AP1 has not transmitted data to the first station STA1 on the first link1, and the second access point AP2 should wait and transmit data to the second station STA2 in synchronization with the first access point AP1 on the first link1 at time t 2.
Next, the second station STA2 acquires the start time and end time information of the transmission Data 3. The second station STA2 transmits Data3 to the second access point AP2, and the transmission time of the Data3 is the same as the transmission time of the Data2 transmitted by the first station STA1 to the first access point AP1 on the first link 1.
Thereafter, the second access point AP2 acquires the start time and end time information of the transmission ACK 4. The second access point AP2 transmits a response ACK4 regarding the Data3 to the second station STA2, the transmission time of the ACK4 is the same as the transmission time of the ACK3 transmitted by the first access point AP1 to the first station STA1 on the first link 1.
Referring to fig. 4, the second station STA2, as a holder of the second link TXOP, initiates synchronous Data transmission and transmits Data2 to the second access point AP 2. The transmission end time of the Data2 is the same as the transmission end time of the Data1 transmitted by the first station STA1 to the first access point AP1 on the first link 1. The start time and end time information of the transmission Data2 should be acquired in advance.
It is appreciated that, until time t3, Data1 has not been transmitted on the first link1, then the second station STA2 should wait and transmit Data to the second access point AP2 at time t3 in synchronization with the first station STA1 on the first link 1.
Then, the second access point AP2 acquires the start time and end time information of the transmission ACK 2. Thereafter, the second access point AP2 transmits a response ACK2 of the Data2 to the second station STA2, and the transmission time of the ACK2 is the same as that of the ACK 1.
The second station STA2 acquires the start time and end time information of the transmission Data 4. The second station STA2 transmits Data4 to the second access point AP 2. The transmission end time of the Data4 is the same as the transmission end time of the Data3 transmitted by the first station STA1 to the first access point AP1 on the first link 1.
Finally, the second access point AP2 obtains the start time and end time information of sending the ACK 4. The second access point AP2 transmits a response ACK4 with respect to the Data4 to the second station STA2, and the transmission time of the response ACK4 is the same as the transmission time of the ACK3 transmitted by the first access point AP1 to the first station STA1 on the first link 1.
In a specific implementation, the frame structure for transmitting data on the second link may be the same as or different from the frame structure for transmitting data on the first link, as long as the transmission times are synchronized.
In an embodiment of the present invention, the data sent by the access point to the station may be single-user data or multi-user data. Here, the single-user data refers to data transmitted from the access point to only one station. The multi-user data refers to data transmitted by the access point to multiple stations in the same channel at the same time.
In another embodiment of the present invention, the transmitted data may be aggregation data, may also be concatenation data, and may also include both aggregation data and concatenation data.
The Aggregation of data refers to the Aggregation of a plurality of specific subframes together by adopting a Frame Aggregation (Frame Aggregation) technology, and the specific subframes are encapsulated according to a protocol and then transmitted, so that the overhead of independently transmitting each subframe is reduced, and the number of response frames is reduced. The aggregated Data includes aggregation for MAC Service Data Units (MSDUs) and aggregation for MAC Protocol Data Units (MPDUs). The corresponding response data is Block Acknowledgement (BA) data or Multiple Block Acknowledgement (MBA) data.
The concatenated data refers to concatenated frames in which control frames or data frames of various formats are concatenated together for transmission.
The following is described in detail with particular reference to fig. 5:
referring to fig. 5, in addition to the first link1 and the second link2, another second link3 is established between the two devices. The access point of the second link3 is a third access point AP3, and the station is a third station STA 3.
The start time t0 of the TXOP on the first link1, the second link2 enters synchronous data transmission at time t4, and the second link3 enters synchronous data transmission at time t 5. The holder of the TXOP on the second link2 is the second access point AP2 and the holder of the TXOP on the second link3 is STA 3.
Unlike fig. 3 and 4, the data transmitted on the three links includes not only aggregate data AMPDU1 to AMPDU6 for MPDUs, but also trigger frames Tr1 to Tr 8. For example, at time t4, the aggregate data AMPDU1 and the trigger frame Tr1 are concatenated as concatenated data and transmitted by the first station STA1 to the first access point AP 1. The trigger frame Tr1 may be used to transfer control information, such as specifying the AP1 to transmit specific data or specifying the transmission duration of the AP 1.
Accordingly, the transmission data of the first access point AP1 is the concatenated BA1 or MBA1 and the trigger frame Tr 2. The trigger frame Tr2 may be used to convey control information, such as specifying STA1 to transmit specific data or specifying STA1 transmission duration.
Similarly, the second link2 and the second link3 also transmit data and receive response data as described above.
As can be seen from the above, with the multilink data transmission method, since the channel state corresponding to the second link is continuously monitored during the duration of the TXOP on the first link, once the channel corresponding to the second link is idle, data transmission synchronized with the first link is started on the second link, so that the channel utilization rate of the second link can be improved.
In order to make the present invention better understood and realized by those skilled in the art, the following detailed description is provided for a device and a computer readable storage medium corresponding to the above method.
Referring to fig. 6, an embodiment of the present invention provides a station 60. The station 60 is integrated in a multilink device that does not support multilink simultaneous transmission and reception. Specifically, the station 60 may include: a first channel state monitoring unit 61 and a first data transmission unit 62. Wherein:
the first channel state monitoring unit 61 is adapted to monitor a channel state of a second link corresponding to the station within a duration of a TXOP on a first link;
the first data transmission unit 62 is adapted to start data transmission synchronized with the first link on the second link when it is monitored that the channel corresponding to the second link is in an idle state.
In an embodiment of the present invention, the first channel state monitoring unit of the station 60 is adapted to monitor a channel state corresponding to the second link in a non-transmission time before the corresponding data on the first link is transmitted. .
In an embodiment of the present invention, the first channel state monitoring unit 61 is adapted to determine that the channel corresponding to the second link is in an idle state when the channel corresponding to the second link is continuously idle for a preset fixed time or a random time.
In an embodiment of the present invention, the first data transmission unit 62 is adapted to, when it is monitored that a channel corresponding to the second link is idle, serve as a holder of the TXOP of the second link, start data transmission synchronized with the first link on the second link
In an embodiment of the present invention, the first data transmission unit 62 may include: a first acquisition subunit (not shown) adapted to acquire duration information of the TXOP on the first link; a first transmitting subunit (not shown) adapted to transmit the duration information of the TXOP on the first link with the first transmitted data.
In an embodiment of the present invention, a frame structure of data transmitted on the second link is different from a frame structure of data transmitted on the first link.
In an embodiment of the present invention, the data transmitted on the first link or the second link is single-user data or multi-user data.
In an embodiment of the present invention, the data transmitted on the first link or the second link is aggregated data or concatenated data.
As can be seen from the foregoing, the station 60 in the embodiment of the present invention may monitor the channel state corresponding to the second link within the duration of the TXOP on the first link, and once the channel corresponding to the second link is idle, start data transmission on the second link that is synchronous with the first link, so as to effectively improve the channel utilization.
Referring to fig. 7, an embodiment of the present invention further provides an access point 70, where the access point 70 is integrated in a multi-link device that does not support multi-link simultaneous transmission and reception. Specifically, the access point 70 may include: a second channel status monitoring unit 71 and a second data transmission unit 72. Wherein:
the second channel state monitoring unit 71 is adapted to monitor a channel state of a second link corresponding to the access point within a duration of transmitting an opportunity TXOP on the first link;
the second data transmission unit 72 is adapted to start data transmission synchronized with the first link on the second link when it is monitored that the channel corresponding to the second link is in an idle state.
In an embodiment of the present invention, the second channel state monitoring unit 71 is adapted to monitor a channel state corresponding to the second link in a non-transmission time before the corresponding data is transmitted on the first link.
In an embodiment of the present invention, the second channel state monitoring unit 71 is adapted to determine that the channel corresponding to the second link is in an idle state when the channel corresponding to the second link is continuously idle for a preset fixed time or a random time.
In an embodiment of the present invention, the second data transmission unit 72 is adapted to, when it is monitored that a channel corresponding to the second link is idle, serve as a holder of the TXOP of the second link, start data transmission synchronized with the first link on the second link.
In an embodiment of the present invention, the second data transmission unit 72 may include: a second acquisition subunit (not shown) adapted to acquire duration information of the TXOP on the first link; a second transmitting subunit (not shown) adapted to transmit the duration information of the TXOP on the first link with the data transmitted for the first time.
In an embodiment of the present invention, a frame structure of data transmitted on the second link is different from a frame structure of data transmitted on the first link.
In an embodiment of the present invention, the data transmitted on the first link or the second link is single-user data or multi-user data.
In an embodiment of the present invention, the data transmitted on the first link or the second link is aggregated data or concatenated data.
As can be seen from the above description, the access point 70 in the embodiment of the present invention may monitor the channel state corresponding to the second link within the duration of the TXOP on the first link, and once the channel corresponding to the second link is idle, start data transmission on the second link that is synchronous with the first link, so as to effectively improve the channel utilization.
It should be noted that, in a specific implementation, the devices where the station 60 and the access point 70 are located may be both a none STR multi-link device, or only one of the devices may be a none STR multi-link device, and the other device is an STR multi-link device.
That is to say, the multilink data transmission method in the embodiment of the present invention is not only suitable for data transmission between two non STR multilink devices, but also suitable for data transmission between only one of the non STR multilink devices and the other one of the non STR multilink devices.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, where the computer program is executed by a processor to implement the steps of any one of the uplink data transmission methods in the foregoing embodiments, and details are not repeated.
In particular implementations, the computer-readable storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (27)

1. A multilink data transmission method, suitable for carrying on the data transmission between two multilink apparatuses that do not support multilink simultaneous sending and receiving, characterized by that, comprising:
monitoring a channel state corresponding to a second link within the duration of transmitting the opportunity TXOP on the first link;
and when the channel corresponding to the second link is monitored to be in an idle state, starting data transmission synchronous with the first link on the second link.
2. The method of claim 1, wherein monitoring a channel state corresponding to a second link for a duration of a transmission opportunity (TXOP) on a first link comprises:
and monitoring the channel state corresponding to the second link in the non-transmission time before the corresponding data on the first link is transmitted.
3. The method for multilink data transmission according to claim 2, wherein said monitoring the channel status corresponding to the second link includes:
and when the channel corresponding to the second link is continuously idle within a preset fixed time length or a random time length, judging that the channel corresponding to the second link is in an idle state.
4. The method for multilink data transmission according to claim 1, wherein the starting of data transmission synchronized with the first link on the second link when it is monitored that a channel corresponding to the second link is idle includes:
and when the channel corresponding to the second link is monitored to be idle, the channel is used as the holder of the TXOP of the second link, and data transmission synchronous with the first link is started on the second link.
5. The method of claim 4, wherein initiating data transmission synchronized with the first link on the second link as a holder of the second link TXOP comprises:
acquiring the duration information of the TXOP on the first link;
and sending the duration information of the TXOP on the first link through the data sent for the first time.
6. The method of claim 4, wherein the holder of the TXOP on the second link is an Access Point (AP) corresponding to the second link; or the holder of the TXOP on the second link is a station STA corresponding to the second link.
7. The method of claim 1, wherein the holder of the TXOP on the first link is a station STA corresponding to the first link; or, the holder of the TXOP on the first link is an access point AP corresponding to the first link.
8. The method of claim 1, wherein a frame structure of data transmitted on the second link is different from a frame structure of data transmitted on the first link.
9. The method for multilink data transmission according to claim 1, wherein the data transmitted on the first link or the second link is single-user data or multi-user data.
10. The method for multilink data transmission according to claim 1, wherein the data transmitted over the first link or the second link is aggregated data or concatenated data.
11. A station integrated in a multi-link device that does not support simultaneous transmission and reception of multiple links, comprising:
the first channel state monitoring unit is suitable for monitoring the channel state of a second link corresponding to the station in the duration of sending the opportunity TXOP on the first link;
and the first data transmission unit is suitable for starting data transmission synchronous with the first link on the second link when the channel corresponding to the second link is monitored to be in an idle state.
12. The station of claim 11, wherein the first channel state monitoring unit is adapted to monitor the channel state corresponding to the second link during a non-transmission time before the corresponding data is transmitted on the first link.
13. The station of claim 11, wherein the first channel state monitoring unit is adapted to determine that the channel corresponding to the second link is in an idle state when the channel corresponding to the second link is idle for a preset fixed time or a random time.
14. The station of claim 11, wherein the first data transmission unit is adapted to initiate data transmission synchronized with the first link on the second link as a holder of the second link TXOP when a channel corresponding to the second link is monitored to be idle.
15. The station of claim 14, wherein the first data transmission unit comprises:
a first obtaining subunit, adapted to obtain duration information of the TXOP on the first link;
and the first sending subunit is suitable for sending the duration information of the TXOP on the first link through the data sent for the first time.
16. The station of claim 11, wherein a frame structure for transmitting data on the second link is different from a frame structure for transmitting data on the first link.
17. The station of claim 11, wherein the data transmitted on the first link or the second link is single-user data or multi-user data.
18. The station of claim 11, wherein the data transmitted over the first link or the second link is aggregated data or concatenated data.
19. An access point integrated in a multi-link device that does not support simultaneous transmission and reception of multiple links, comprising:
a second channel state monitoring unit, adapted to monitor a channel state of a second link corresponding to the access point within a duration of transmitting the opportunity TXOP on the first link;
and the second data transmission unit is suitable for starting data transmission synchronous with the first link on the second link when the channel corresponding to the second link is monitored to be in an idle state.
20. The station of claim 19, wherein the second channel state monitoring unit is adapted to monitor the channel state corresponding to the second link during a non-transmission time before the corresponding data is transmitted on the first link.
21. The station according to claim 19, wherein the second channel state monitoring unit is adapted to determine that the channel corresponding to the second link is in an idle state when the channel corresponding to the second link is idle for a preset fixed time or a random time.
22. The station of claim 19, wherein the second data transmission unit is adapted to initiate data transmission synchronized with the first link on the second link as a holder of the second link TXOP when a channel corresponding to the second link is monitored to be idle.
23. The station of claim 22, wherein the second data transmission unit comprises:
a second obtaining subunit, adapted to obtain duration information of the TXOP on the first link;
and the second sending subunit is suitable for sending the duration information of the TXOP on the first link through the data sent for the first time.
24. The station of claim 19, wherein a frame structure for data transmitted on the second link is different from a frame structure for data transmitted on the first link.
25. The station of claim 19, wherein the data transmitted on the first link or the second link is single-user data or multi-user data.
26. The station of claim 19, wherein the data transmitted on the first link or the second link is aggregated data or concatenated data.
27. A computer-readable storage medium, on which a computer program is stored, which computer program is executable by a processor for carrying out the steps of the method according to any one of claims 1 to 10.
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