CN109412711B - Pairing method and device for asymmetric in-band full-duplex communication and terminal - Google Patents
Pairing method and device for asymmetric in-band full-duplex communication and terminal Download PDFInfo
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Abstract
A pairing method, a device and a terminal for asymmetric in-band full-duplex communication are provided, wherein the pairing method comprises the following steps: sending a group of trigger frames, wherein the group of trigger frames carries RU reporting indication information, the RU reporting indication information is used for indicating each first receiving node which carries out RU measurement and reports, and the group of trigger frames comprises at least one trigger frame; and receiving the measurement report sent by each first receiving node to determine a pairing node for asymmetric in-band full-duplex communication. By the technical scheme provided by the invention, the appropriate station can be selected to carry out asymmetric in-band full duplex communication with the access point, the data transmission rate is improved, and the advantages of in-band full duplex communication are brought into play.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a pairing method and device for asymmetric in-band full-duplex communication and a terminal.
Background
The Institute of Electrical and Electronics Engineers 802.11Full Duplex Interest Group (Institute of Electrical and Electronics Engineers 802.11Full Duplex Topic Interest Group, IEEE802.11FD TIG) introduced the concept of In-band Full Duplex (IFD) that allows IEEE802.11 systems (e.g., Wireless Local Area Network (WLAN) systems) to perform Full Duplex communications.
The wireless in-band full duplex can be divided into two types, namely symmetrical full duplex and asymmetrical full duplex. For a WLAN, when full-duplex communication between an Access Point (AP) and a STAtion (STA) is symmetric full-duplex communication, both the AP and the STA have full-duplex capability. When the full-duplex communication between the AP and the STA is asymmetric in-band full-duplex communication, the AP has full-duplex capability and performs transceiving at the same time. For example, the AP transmits packets to STAB while receiving packets from STAA.
In the asymmetric in-band full duplex communication, only when the path loss between two STAs reaches a certain threshold, the two STAs are suitable for performing data communication with the AP at the same time, otherwise, the two STAs interfere with each other, which reduces the communication quality. However, the prior art does not provide a relevant solution how to select a suitable STA for full-duplex communication with an AP having full-duplex capability.
Disclosure of Invention
The invention solves the technical problem of how to select the station to complete asymmetric in-band full duplex communication so as to improve the transmission rate.
In order to solve the above technical problem, an embodiment of the present invention provides a pairing method for asymmetric in-band full-duplex communication, where the pairing method for asymmetric in-band full-duplex communication includes: sending a group of trigger frames, wherein the group of trigger frames carries RU reporting indication information, the RU reporting indication information is used for indicating each first receiving node which carries out RU measurement and reports, and the group of trigger frames comprises at least one trigger frame; and receiving the measurement report sent by each first receiving node to determine a pairing node for asymmetric in-band full-duplex communication.
Optionally, the group of trigger frames includes two trigger frames, and the sending the group of trigger frames includes: sending a first trigger frame; receiving a PPDU packet sent by each second receiving node indicated by the first trigger frame, wherein the PPDU packet is selected from: an uplink OFDMA PPDU packet and an uplink MU-MIMO PPDU packet; sending a second trigger frame, wherein the first trigger frame or the second trigger frame comprises the RU report indication information.
Optionally, the group of trigger frames includes two trigger frames, and the sending the group of trigger frames includes: sending a first trigger frame; sending a second trigger frame, wherein the first trigger frame or the second trigger frame comprises the RU report indication information.
Optionally, each first receiving node is a full duplex node, the group of trigger frames includes one trigger frame, and the sending the group of trigger frames includes: and sending a trigger frame comprising the RU report indication information.
Optionally, the receiving the measurement report sent by each first receiving node includes: receiving a PPDU packet and a measurement report sent by each first receiving node indicated by the trigger frame, wherein the PPDU packet is selected from: an uplink OFDMA PPDU packet and an uplink MU-MIMO PPDU packet.
Optionally, the receiving the measurement report sent by each first receiving node includes: and receiving the detection packet and the measurement report which are sent by each first receiving node and indicated by the trigger frame.
Optionally, after receiving the measurement report sent by each first receiving node, the pairing method further includes: an acknowledgement frame is sent to each first receiving node.
Optionally, after receiving the measurement report sent by each first receiving node, the pairing method further includes: and sending the node pairing success information to each pairing node.
Optionally, the measurement report is 1 bit or multiple bits, and the number of bits increases with an increase in the number of the preset path loss thresholds.
In order to solve the above technical problem, an embodiment of the present invention further provides a pairing method for asymmetric in-band full duplex communication, including: receiving a group of trigger frames sent by a sending node, wherein the group of trigger frames carries RU report indication information which is used for indicating each first receiving node which carries out RU measurement and reports; and judging whether the current node is the first receiving node or not according to the RU report indication information, if so, executing measurement and sending a measurement report to the sending node so that the sending node determines a pairing node of asymmetric in-band full duplex communication according to the measurement report.
Optionally, the group of trigger frames includes two trigger frames, and the group of trigger frames sent by the receiving and sending node includes: receiving a first trigger frame sent by the sending node; determining whether the current node is a second receiving node according to the first trigger frame, and if so, sending a PPDU packet selected from: an uplink OFDMA PPDU packet and an uplink MU-MIMO PPDU packet; and receiving an acknowledgement frame and a second trigger frame sent by the sending node, wherein the first trigger frame or the second trigger frame comprises the RU report indication information.
Optionally, the group of trigger frames includes two trigger frames, and the group of trigger frames sent by the receiving and sending node includes: receiving a first trigger frame sent by the sending node; determining whether the current node is a second receiving node according to the first trigger frame, and if so, sending a detection packet; and receiving a second trigger frame sent by the sending node, wherein the first trigger frame or the second trigger frame comprises the RU report indication information.
Optionally, each receiving node is a full-duplex node, and the receiving a group of trigger frames includes: receiving a trigger frame including the RU report instruction information.
Optionally, the sending the measurement report to the sending node includes: transmitting a PPDU packet and a measurement report to the transmitting node, the PPDU packet selected from: an uplink OFDMA PPDU packet and an uplink MU-MIMO PPDU packet.
Optionally, the sending the measurement report to the sending node includes: sending a probe packet and a measurement report to the sending node.
Optionally, after sending the measurement report to the sending node, the pairing method further includes: and receiving the acknowledgement frame sent by the sending node.
Optionally, after sending the measurement report to the sending node, the pairing method further includes: receiving node pairing success information from the sending node, wherein the node pairing success information is sent when the current node is determined to be a pairing node.
Optionally, the measurement report is 1 bit or multiple bits, and the number of bits increases with an increase in the number of the preset path loss thresholds.
To solve the foregoing technical problem, an embodiment of the present invention further provides an asymmetric in-band full-duplex communication pairing device, including: a sending module, adapted to send a set of trigger frames, where the set of trigger frames carries RU report instruction information, where the RU report instruction information is used to instruct each first receiving node that performs RU measurement and reports, and the set of trigger frames includes at least one trigger frame; and the receiving module is suitable for receiving the measurement report sent by each first receiving node so as to determine the paired nodes of the asymmetric in-band full-duplex communication.
To solve the foregoing technical problem, an embodiment of the present invention further provides an asymmetric in-band full-duplex communication pairing device, including: a receiving module, adapted to receive a group of trigger frames sent by a sending node, where the group of trigger frames carries RU report instruction information, and the RU report instruction information is used to instruct each first receiving node that performs RU measurement and reports; and the judging module is used for judging whether the current node is the first receiving node or not according to the RU report indication information, and if so, the judging module is suitable for executing measurement and sending a measurement report to the sending node so that the sending node determines a pairing node of asymmetric in-band full-duplex communication according to the measurement report.
To solve the above technical problem, an embodiment of the present invention further provides a storage medium having stored thereon computer instructions, where the computer instructions execute the steps of the above method when executed.
In order to solve the foregoing technical problem, an embodiment of the present invention further provides a terminal, including a memory and a processor, where the memory stores computer instructions executable on the processor, and the processor executes the computer instructions, where the steps of the foregoing method are performed.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a pairing method of asymmetric in-band full duplex communication, which comprises the following steps: sending a group of trigger frames, wherein the group of trigger frames carries RU reporting indication information, the RU reporting indication information is used for indicating each first receiving node which carries out RU measurement and reports, and the group of trigger frames comprises at least one trigger frame; and receiving the measurement report sent by each first receiving node to determine a pairing node for asymmetric in-band full-duplex communication. By the technical scheme provided by the embodiment of the invention, the sending node (for example, AP) can carry the RU report indication information in the trigger frame, so that the first receiving node can carry out channel measurement and report a measurement report according to the RU report indication information. Then, the sending node can determine a pairing node suitable for asymmetric in-band full-duplex communication according to the measurement report so as to perform full-duplex communication, exert the advantages of full-duplex communication and obtain higher data transmission rate.
Further, the set of trigger frames includes two trigger frames, and the sending the set of trigger frames includes: sending a first trigger frame; receiving a PPDU packet sent by each second receiving node indicated by the first trigger frame, wherein the PPDU packet is selected from: an uplink OFDMA PPDU packet and an uplink MU-MIMO PPDU packet; sending a second trigger frame, wherein the first trigger frame or the second trigger frame comprises the RU report indication information. According to the technical scheme provided by the embodiment of the invention, when one group of trigger frames comprises two trigger frames, one trigger frame can be used for sending the RU report indication information, so that the possibility of determining the paired nodes for the sending node is provided.
Further, each first receiving node is a full-duplex node, the set of trigger frames includes one trigger frame, and the sending the set of trigger frames includes: and sending a trigger frame comprising the RU report indication information. Through the technical scheme provided by the embodiment of the invention, when only one trigger frame is contained in one group of trigger frames, the RU report indication information can be carried by the trigger frame, thereby providing possibility for a sending node to determine a paired node.
Drawings
Fig. 1 is a schematic diagram of a typical application scenario of asymmetric in-band full-duplex communication in a WLAN system;
fig. 2 is a flowchart illustrating a pairing method for asymmetric in-band full-duplex communication according to an embodiment of the present invention;
fig. 3 to 8 are schematic flow charts of pairing methods of asymmetric in-band full-duplex communication according to embodiments of the present invention;
fig. 9 is a flowchart illustrating a pairing method for asymmetric in-band full-duplex communication according to another embodiment of the present invention;
fig. 10 is a schematic structural diagram of a pairing device for asymmetric in-band full-duplex communication according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of another asymmetric pairing apparatus for in-band full-duplex communication according to an embodiment of the present invention.
Detailed Description
As noted in the background, prior art solutions do not address the problem of node pairing and selection for asymmetric in-band full-duplex communication.
Specifically, IEEE802.11FD TIG focuses on wireless in-band full duplex communication. Among them, asymmetric FD (e.g., an AP transceiving packets with different STAs) is one of the key issues.
Some protocol specifications for asymmetric operation (asymmetric operation) have been proposed currently. However, these protocol specifications do not relate to how to determine a suitable station as an asymmetric FD communication node. In the asymmetric FD scenario, the path loss between two STAs that become communication nodes should be as large as possible. The intuitive method is to detect whether the path loss between two STAs meets the path loss requirement.
Taking fig. 1 as an example, fig. 1 is a schematic diagram of a typical application scenario of asymmetric in-band full-duplex communication in a WLAN system. In this WLAN communication scenario, the AP with full-duplex communication capability, and the node STA1, the node STA2, the node STA3, and the node STA4 with half-duplex communication capability are included. Node STA2, node STA4 are a pair of suitable asymmetric full duplex paired nodes (pair). Among them, the node STA2 transmits data to the AP, and the node STA4 receives data from the AP. In contrast, since the path loss between node STA1 and node STA2 does not satisfy the path loss requirement, the transmission signal of node STA2 may interfere with the reception signal of node STA1, so that node STA1 and node STA2 cannot form a proper pairing node.
The embodiment of the invention provides a pairing method of asymmetric in-band full duplex communication, which comprises the following steps: sending a group of trigger frames, wherein the group of trigger frames carries RU reporting indication information, the RU reporting indication information is used for indicating each first receiving node which carries out RU measurement and reports, and the group of trigger frames comprises at least one trigger frame; and receiving the measurement report sent by each first receiving node to determine a pairing node for asymmetric in-band full-duplex communication. By the technical scheme provided by the embodiment of the invention, the sending node (for example, AP) can carry the RU report indication information in the trigger frame, so that the first receiving node can carry out channel measurement and report a measurement report according to the RU report indication information. Then, the sending node can determine a pairing node suitable for asymmetric in-band full-duplex communication according to the measurement report so as to perform full-duplex communication, exert the advantages of full-duplex communication and obtain higher data transmission rate.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 2 is a flowchart illustrating an asymmetric in-band full-duplex communication pairing method according to an embodiment of the present invention, where the node pairing method is applicable to a transmitting node side with full-duplex communication capability (e.g., an AP side with full-duplex communication capability) in a WLAN system. Specifically, the node pairing method may include the steps of:
step S201, sending a group of trigger frames, wherein the group of trigger frames carries RU report indication information, the RU report indication information is used for indicating each first receiving node which carries out RU measurement and reports, and the group of trigger frames comprises at least one trigger frame;
step S202, receiving the measurement report sent by each first receiving node to determine a paired node for asymmetric in-band full-duplex communication.
More specifically, in step S201, a transmitting node (e.g., a WLAN AP) may transmit a set of trigger frames (trigger frames) to a plurality of receiving nodes (e.g., WLAN STAs). For simplicity, the following description will take an AP with full duplex communication capability as a transmitting node and a WLAN STA as a receiving node as an example.
In a specific implementation, the trigger frame may include a plurality of receiving nodes and time-frequency Resource information of Resource Units (RUs) uploaded by each receiving node, so that the receiving nodes may select corresponding RU locations according to information carried by the trigger frame to perform Access of Orthogonal Frequency Division Multiple Access (OFDMA).
In different scenarios, the number of trigger frames sent by an AP may be different. For example, the number may be one, two, etc. When there are two trigger frames in a group of trigger frames, RU report instruction information may be included in the first trigger frame or the second trigger frame, where the RU report instruction information may be used to instruct each first receiving node that performs RU measurement and reports. The first receiving node may be a part of the receiving nodes. The AP may notify which receiving nodes (i.e., first receiving nodes) report the measurement report by adding the RU report instruction information in the trigger frame, so that the AP may determine the paired nodes for asymmetric FD communication according to the measurement report sent by each first receiving node.
In a specific implementation, when a group of trigger frames sent by an AP includes two trigger frames, a first trigger frame may include related parameter information for OFDMA access; the second trigger frame may include RU reporting indicator information in addition to parameter information such as RU time frequency information used for time frequency synchronization and reporting measurement reports.
As a variation, when a group of trigger frames sent by the AP includes two trigger frames, the first trigger frame may include RU report indication information in addition to the related parameter information for OFDMA access; the second trigger frame may only include parameter information such as RU time frequency information used for time frequency synchronization and reporting of a measurement report.
As a non-limiting example, when a set of trigger frames sent by the AP includes two trigger frames, the first trigger frame includes RU report instruction information. In a particular implementation, the AP may send a first trigger frame. After receiving the first trigger frame, the receiving node may determine, according to information carried in the first trigger frame, whether the current receiving node is a second receiving node that needs to feed back a data packet to the AP, and if so, the receiving node feeds back the data packet to the AP. The Data packet may be a Physical Protocol Data Unit (PPDU) packet. Wherein, the RU time-frequency resource of each data packet may be a plurality of consecutive carriers (a blocks of tones). The PPDU packet can be an uplink OFDMA PPDU packet and an uplink Multi-User Input and Output (MU-MIMO) PPDU packet.
At this time, since the first trigger frame further includes RU report instruction information, after receiving the first trigger frame, each receiving node can also know whether it is the first receiving node that needs to perform measurement and report a measurement report. If the measurement report needs to be reported, when the second receiving node sends a data packet, the time-frequency resource of the data packet can be measured to obtain a measurement result, and a measurement report is formed. Each receiving node may be a half-duplex node or an FD node. When each receiving node is a half-duplex node, the first receiving node refers to a receiving node that transmits a measurement report, and the second receiving node is another receiving node different from the first receiving node and transmitting a data packet (e.g., a PPDU packet) or other packet. When each receiving node is an FD node, the first receiving node and the second receiving node may be the same receiving node, and may send a measurement report or a data packet or other packets.
For the AP, after receiving the data packet sent by each second receiving node, the AP may send an ACKnowledgement (ACK) frame and a second trigger frame to the second receiving node that sends the data packet. After receiving the second trigger frame, each first receiving node may send a measurement report to the AP after obtaining the measurement report.
As a variation, when a group of trigger frames sent by the AP includes two trigger frames, the first trigger frame does not include the RU report instruction information, and the second trigger frame includes the RU report instruction information. In a particular implementation, the AP may send a first trigger frame. After receiving the first trigger frame, the receiving node may determine, according to information carried by the first trigger frame, whether the current receiving node is a second receiving node that needs to feed back a data packet to the AP, and if so, the receiving node may feed back a PPDU packet to the AP, where the PPDU packet may be an uplink OFDMA PPDU packet or an uplink MU-MIMO PPDU packet.
At this time, since the first trigger frame does not include the RU report instruction information, after receiving the first trigger frame, each receiving node cannot know whether it needs to perform measurement and report a measurement report. In order to enable the AP to determine the paired nodes of the asymmetric FD, among the receiving nodes that receive the first trigger frame, each second receiving node having FD communication capability and other receiving nodes that have half-duplex capability and do not send data packets may perform time-frequency resource measurement to obtain a measurement result when the second receiving node sends a data packet, so as to form a measurement report.
For the AP, after receiving the data packet sent by each second receiving node, the AP may send an ACK frame and a second trigger frame to the second receiving node that sent the data packet. As a variation, after receiving the data packet sent by each second receiving node, the AP may send a second trigger frame (no ACK frame) to the second receiving node that sent the data packet. Each receiving node receiving the second trigger frame can know whether the receiving node is the first receiving node needing to report the measurement report from the RU report instruction information in the second trigger frame. If so, the first receiving node may send the measurement report to the AP after obtaining the measurement report.
As another variation, in a specific implementation, when a group of trigger frames sent by the AP includes two trigger frames, the AP may send a first trigger frame and a second trigger frame respectively. For each receiving node, after receiving a first trigger frame sent by an AP, if it is determined that a current node is a second receiving node that needs to send a probe packet to the AP according to information carried by the first trigger frame, the second receiving node sends the probe packet to the AP. The AP may send the second trigger frame directly after receiving the sounding packet without sending an ACK frame before sending the second trigger frame. It should be noted that the sounding Packet may be an uplink OFDMA and/or MU-MIMO Null Packet (e.g., (Null Data Packet, NDP for short)). Alternatively, the sounding packet may be a null packet of a carrier-interleaved (tone-interleaved) packet.
As a variation, for each receiving node, after receiving a first trigger frame sent by an AP, if it is determined that a current node is a second receiving node that sends a probe packet according to information carried in the first trigger frame, the second receiving node may send the probe packet to a peripheral receiving node and the AP. The AP may ignore the probe packet (e.g., the AP does not receive the probe packet), send the second trigger frame directly, and not send an ACK frame before sending the second trigger frame. It should be noted that the sending time of the probe packet may be the time after the first trigger frame is received.
Further, after receiving a second trigger frame, each receiving node may learn whether it is a first receiving node that needs to feed back a measurement report according to RU report indication information included in the first trigger frame or the second trigger frame, and if so, the first receiving node may send the measurement report to the AP after receiving the second trigger frame. Where the RU of each data packet may be an interleaved tone (tones), i.e., a number of non-adjacent carriers. Those skilled in the art will understand that the specific flow when the RU report instruction information is included in the first trigger frame or the second trigger frame may refer to the above, and will not be repeated here.
It should be noted that, if a group of trigger frames sent by the AP includes a first trigger frame and a second trigger frame, where the first trigger frame instructs each second receiving node to send a probe packet, each second receiving node may send a probe packet. If the second trigger frame indicates that each first receiving node sends a measurement report, the first receiving node may send the measurement report after receiving the second trigger frame. If the set of trigger frames sent by the AP includes one trigger frame and the trigger frame instructs each first receiving node to send a probe packet and a measurement report, the first receiving node may send a probe packet and then send the measurement report after receiving the trigger frame.
In a specific implementation, when a group of trigger frames sent by the AP includes one trigger frame, the trigger frame may include RU report instruction information. After the AP sends the trigger frame, the receiving node with full duplex communication capability can know whether it needs to feed back PPDU packets to the AP or not and whether it needs to report a measurement report or not according to the information carried by the trigger frame after receiving the trigger frame. If the data packet needs to be fed back and the measurement report is reported, the receiving node may send the measurement report later when feeding back the data packet to the AP. Wherein the PPDU packet may be selected from: an uplink OFDMA PPDU packet and an uplink MU-MIMO PPDU packet.
As a variation, in a specific implementation, when a group of trigger frames sent by the AP includes one trigger frame, the trigger frame may include RU report instruction information. After the AP sends the trigger frame, the receiving node with full duplex communication capability can know whether it needs to feed back a probe packet to the AP or not and whether it needs to report a measurement report or not according to the information carried by the trigger frame after receiving the trigger frame. If the probe packet needs to be fed back and the measurement report needs to be reported, the receiving node may subsequently send the measurement report to the AP when sending the probe packet. Wherein the measurement report is obtained by measuring the probe packet. It should be noted that after receiving the trigger frame, each receiving node may learn whether it needs to send a probe packet to a peripheral node according to information carried in the trigger frame, at this time, the receiving node that needs to send the probe packet may send the probe packet to the peripheral node (for example, send the probe packet after receiving the trigger frame, and then send a measurement report), and the AP may receive the probe packet as the peripheral node, or may directly ignore the probe packet.
Those skilled in the art understand that, when a group of trigger frames sent by the AP includes two trigger frames, the first trigger frame may include the RU report instruction information in addition to the related parameter information for OFDMA access; the second trigger frame may include RU reporting instruction information in addition to parameter information such as RU time frequency information used for time frequency synchronization and reporting measurement reports.
In step S202, the AP may receive the measurement report from the first receiving node when the set of trigger frames includes two trigger frames. After receiving the measurement report transmitted by each first receiving node, the AP may transmit an acknowledgement frame to each first receiving node.
As a variation, the AP may receive a data packet and a measurement report together from the first node when the set of trigger frames includes one trigger frame; alternatively, the AP may receive a probe packet and a measurement report together from the first receiving node. Thereafter, the AP may transmit an ACK frame to each first receiving node. In an implementation, the AP may ignore the probe packet sent by the first receiving node and only receive the measurement report.
In a specific implementation, after obtaining the measurement report, the AP may determine which nodes are paired nodes according to the measurement report, so as to perform asymmetric FD communication. When asymmetric FD communication is performed, the pairing node may be sent to each pairing node as node pairing success information. It should be noted that the measurement report may be obtained according to the measurement result of each RU, or each node may also be obtained according to the measurement results of the plurality of RUs measured by each node, or obtained according to the measurement result of each second receiving node.
In a specific implementation, the measurement report may be 1 bit or more. Specifically, if there are only 1 preset path loss threshold, a 1-bit measurement report may be used to indicate whether the measurement result is lower than the preset path loss threshold. If there are multiple preset path loss thresholds, then the measurement report with multiple bits can be used to indicate the path loss range where the measurement result is located. The more the preset path loss threshold is, the more the number of bits of the measurement report is, and the higher the accuracy of the measurement report is. The measurement result may be a Received Signal Strength Indicator (RSSI).
For example, the predetermined path loss thresholds are three predetermined thresholds of-82 db milliWatt (dBm), 72dBm and-62 dBm, respectively, and the measurement report may be 2 bits. The measurement results are expressed as RSSI, and the measurement report is shown in table 1.
TABLE 1
| RSSI | -85 | -70 | -76 | -40 | -63 |
| Measurement reporting | 00 | 10 | 01 | 11 | 10 |
Fig. 3 is a flowchart illustrating a pairing method for asymmetric in-band full-duplex communication according to an embodiment of the present invention. The AP has full-duplex communication capability, and the node STA1, the nodes STA2 and … …, the node STAn, the node STA (n +1), the nodes STA (n +2) and … …, and the node STAk all have half-duplex communication capability. The AP sends a first trigger frame and a second trigger frame in a downlink, the first trigger frame or the second trigger frame comprises RU report indication information, and each node can know that the node sending the data packet is a node STA1, a node STA2, a node … … and a node STAN through the RU report indication information; the nodes sending the measurement report are node STA (n +1), node STA (n +2), … …, and node STAk. When the node STA1, the node STAs 2, … …, and the node STAn transmit data packets through the uplink, the node STA (n +1), the node STAs (n +2), … …, and the node STAk may perform Available RU (Available RU, or ARU) measurement, and form a measurement report. In general, the AP transmits an ACK frame and receives a measurement report after receiving a data packet of each node. Further, the AP may transmit an ACK frame to each node that transmits the measurement report. It should be noted that the ARU refers to an RU in which the first receiving node transmits a data packet to the AP.
Those skilled in the art will appreciate that the AP may not send an ACK frame and receive a measurement report after receiving a data packet for each node. Further, the AP may not transmit an ACK frame to each node that transmits the measurement report.
Fig. 4 is a flowchart illustrating a pairing method for asymmetric in-band full-duplex communication according to another embodiment of the present invention. The AP has full-duplex communication capability, and the node STA1, the nodes STA2, … …, and the node STAn all have full-duplex communication capability. The AP sends a first trigger frame and a second trigger frame in a downlink, the first trigger frame or the second trigger frame comprises RU report indication information, and each node can know that the node sending the data packet and the measurement report is the node STA1, the nodes STA2, … … and the node STAn through the RU report indication information. The node STA1, the node STAs 2 and … …, and the node STA n also perform the ARU measurement and form a measurement report when transmitting the data packet in the uplink. After receiving the data packets of the respective nodes, the AP transmits an ACK frame and receives a measurement report. Further, the AP may transmit an ACK frame to each node that transmits the measurement report.
Fig. 5 is a flowchart illustrating another pairing method for asymmetric in-band full-duplex communication according to an embodiment of the present invention. The AP has full-duplex communication capability, and the node STA1, the nodes STA2 and … …, the node STAn, the node STA (n +1), the nodes STA (n +2) and … …, and the node STAk all have half-duplex communication capability. After the AP transmits the first trigger frame, the node STA1, the node STAs 2, … …, the node STAn transmit a sounding packet to the AP. At this time, the nodes STA (n +1), STA (n +2), … …, and STAk may perform the ARU measurement to form a measurement report. After receiving the data packet of each node, the AP transmits a second trigger frame and receives measurement reports from the nodes STA (n +1), STA (n +2), … …, and STA k. Further, the AP may transmit an ACK frame to each node that transmits the measurement report. Further details may refer to the description in fig. 3.
Fig. 6 is a flowchart illustrating a pairing method for asymmetric in-band full-duplex communication according to another embodiment of the present invention. The AP has full-duplex communication capability, and the node STA1, the nodes STA2, … …, and the node STAn all have full-duplex communication capability. After the AP transmits the first trigger frame, the node STA1, the node STAs 2, … …, and the node STAn also perform the ARU measurement while transmitting the probe packet to the AP to form a measurement report. After that, the AP transmits a second trigger frame and receives measurement reports from the node STA1, the node STAs 2, … …, and the node STAn, after receiving the data packet of each node. Further, the AP may transmit an ACK frame to each node that transmits the measurement report. Further details may refer to the description in fig. 4.
Fig. 7 is a flowchart illustrating a next pairing method for asymmetric in-band full-duplex communication according to an embodiment of the present invention. The AP, the node STA1, the nodes STA2, … …, and the node STAn all have full-duplex communication capability. After the AP transmits the first trigger frame, the node STA1, the node STAs 2, … …, and the node STAn transmit the measurement report together while transmitting the data packet to the AP. Thereafter, the AP transmits an ACK frame to node STA1, node STAs 2, … …, node STAn.
Fig. 8 is a flowchart illustrating a pairing method for asymmetric in-band full-duplex communication according to another embodiment of the present invention. The AP, the node STA1, the nodes STA2, … …, and the node STAn all have full-duplex communication capability. After the AP transmits the first trigger frame, the node STA1, the node STAs 2, … …, and the node STAn transmit a probe packet to the AP and simultaneously transmit a measurement report. Thereafter, the AP transmits an ACK frame to node STA1, node STAs 2, … …, node STAn.
In a specific implementation, after the AP obtains the node pairing success information, the AP may perform asymmetric FD transmission with the pairing node.
Fig. 9 is a flowchart illustrating a pairing method for asymmetric in-band full-duplex communication according to another embodiment of the present invention. The pairing method may be used on the receiving node side (e.g., WLAN STA side). Specifically, the pairing method may include the steps of:
step S301, receiving a group of trigger frames sent by a sending node, wherein the group of trigger frames carries RU report indication information, and the RU report indication information is used for indicating each first receiving node which performs RU measurement and reports;
step S302, judging whether the current node is the first receiving node according to the RU report indication information, if so, executing measurement and sending a measurement report to the sending node, so that the sending node determines a paired node of asymmetric in-band full duplex communication according to the measurement report.
In a specific implementation, in step S301, a node (e.g., a WLAN STA) may receive a set of trigger frames from a sending node (e.g., an AP), where the set of trigger frames may carry RU report instruction information, and the RU report instruction information is used to instruct each first receiving node that performs RU measurement and reports.
When the group of trigger frames comprises two trigger frames, the WLAN STA can receive a first trigger frame sent by the sending node; and determining whether the current node is a second receiving node according to the first trigger frame, if so, the WLAN STA can send a PPDU packet to the sending node. Thereafter, an acknowledgement frame and a second trigger frame transmitted by the transmitting node may be received. Wherein the first trigger frame or the second trigger frame may include the RU report indication information.
As a variation, when the set of trigger frames includes two trigger frames, the WLAN STA may receive a first trigger frame sent by the transmitting node; and determining whether the current node is a second receiving node according to the first trigger frame, and if so, sending a detection packet. Thereafter, a second trigger frame sent by the sending node may be received, where the first trigger frame or the second trigger frame includes the RU report instruction information.
As a further variation, when a receiving node is a full-duplex node, the first receiving node may be the same as the second receiving node, i.e. both are the same node, for a single node. At this time, a trigger frame including the RU report instruction information may be received from the AP. Thereafter, the node may transmit a data packet and a measurement report to the transmitting node, where the data packet may be an uplink OFDMA PPDU packet, an uplink MU-MIMO PPDU packet, or other PPDU packet. Alternatively, the node may send a sounding packet, which may be a null packet of carrier frequency interlace or an NDP packet, and a measurement report to the sending node. And then receiving the acknowledgement frame sent by the sending node from the sending node. It should be noted that the sending node may ignore the probe packet.
In a specific implementation, after the WLAN STA transmits the measurement report to the transmitting node, if the current node is determined to be a pairing node, the WLAN STA may further receive node pairing success information from the transmitting node, where the node pairing success information is sent when the current node is determined to be a pairing node.
In a specific implementation, the measurement report may be 1 bit or more, and the number of bits may increase as the number of the preset path loss thresholds increases.
Fig. 10 is a pairing apparatus for asymmetric in-band full-duplex communication according to an embodiment of the present invention. The pairing apparatus 2 (for simplicity, hereinafter referred to as the pairing apparatus 2) for asymmetric in-band full-duplex communication may be used to implement the technical solutions of the pairing methods shown in fig. 2 to 8, and may be applied to the WLAN AP side. Specifically, the configuration apparatus 2 may include: a transmitting module 21 and a receiving module 22.
More specifically, the sending module 21 is adapted to send a group of trigger frames, where the group of trigger frames carries RU report instruction information, where the RU report instruction information is used to instruct each first receiving node that performs RU measurement and reports, and the group of trigger frames includes at least one trigger frame; the receiving module 22 is adapted to receive the measurement report sent by each first receiving node to determine a paired node for asymmetric in-band full-duplex communication.
In a specific implementation, the set of trigger frames includes two trigger frames, and the sending module 21 may include: a first sending submodule 211 adapted to send a first trigger frame; a first receiving submodule 212, adapted to receive PPDU packets sent by the respective second receiving nodes indicated by the first trigger frame, where the PPDU packets are selected from: an uplink OFDMA PPDU packet and an uplink MU-MIMO PPDU packet; a second sending submodule 213 adapted to send a second trigger frame, the first trigger frame or the second trigger frame including the RU report instruction information.
As a variation, the group of trigger frames includes two trigger frames, and the sending module 21 may include: a third transmitting submodule 214 adapted to transmit the first trigger frame; a fourth sending submodule 215 adapted to send a second trigger frame, the first trigger frame or the second trigger frame including the RU report instruction information.
As another variation, each first receiving node is a full-duplex node, the group of trigger frames includes one trigger frame, and the sending module 21 may include: a fifth sending submodule 216 adapted to send a trigger frame including the RU report instruction information.
In a specific implementation, the receiving module 22 may include: a third receiving submodule 221, adapted to receive a data PPDU packet and a measurement report sent by each first receiving node indicated by the trigger frame, where the PPDU packet is selected from: an uplink OFDMAPPDU packet and an uplink MU-MIMO PPDU packet.
In a specific implementation, the receiving module 22 may include: a fourth receiving sub-module 222, adapted to receive the sounding packets and the measurement reports sent by the respective first receiving nodes indicated by the trigger frame.
In a specific implementation, the pairing apparatus 2 may further include: an acknowledgement frame sending module 23 adapted to send an acknowledgement frame to each first receiving node.
In a specific implementation, the pairing apparatus 2 may further include: and the pairing success sending module 24 is adapted to send the node pairing success information to each pairing node.
The measurement report may be 1 bit or multiple bits, and the number of bits increases with the increase of the number of the preset path loss thresholds.
For more details of the operation principle and the operation mode of the pairing apparatus 2, reference may be made to the description in fig. 2 to fig. 8, and details are not repeated here.
Fig. 11 is a pairing device for asymmetric in-band full-duplex communication according to an embodiment of the present invention, where the pairing device 3 for asymmetric in-band full-duplex communication (hereinafter referred to as the pairing device 3 for simplicity) may be used to implement the technical solution of the pairing method shown in fig. 9, and may be applied to a WLAN STA side. Specifically, the configuration device 3 may include: a receiving module 31 and a judging module 32.
More specifically, the receiving module 31 is adapted to receive a group of trigger frames sent by a sending node, where the group of trigger frames carries RU report instruction information, and the RU report instruction information is used to instruct each first receiving node that performs RU measurement and reports; and judging whether the current node is the first receiving node or not according to the RU report instruction information, and if so, the judging module 32 is adapted to send a measurement report to the sending node, so that the sending node determines a paired node of asymmetric in-band full-duplex communication according to the measurement report.
In a specific implementation, the set of trigger frames may include two trigger frames, and the receiving module 31 may include: a first receiving submodule 311, adapted to receive a first trigger frame sent by the sending node; a first determining sub-module 312, adapted to determine whether the current node is a second receiving node according to the first trigger frame, and if so, send a PPDU packet to the sending node, where the PPDU packet is selected from: an uplink OFDMAPPDU packet and an uplink MU-MIMO PPDU packet; a second receiving submodule 313, adapted to receive an acknowledgement frame and a second trigger frame sent by the sending node, where the first trigger frame or the second trigger frame includes the RU report instruction information.
As a variation, the set of trigger frames may include two trigger frames, and the receiving module 31 may include: a third receiving submodule 314, adapted to receive the first trigger frame sent by the sending node; a second determining sub-module 315 adapted to determine whether the current node is a second receiving node according to the first trigger frame, and if so, send a probe packet; the fourth receiving submodule 316 receives a second trigger frame sent by the sending node, where the first trigger frame or the second trigger frame includes the RU report instruction information.
As another variation, each receiving node is a full-duplex node, and the receiving module 31 may include: a fifth receiving submodule 317 adapted to receive a trigger frame including the RU report instruction information.
In a specific implementation, the determining module 32 may include: a first transmitting submodule 321 adapted to transmit a PPDU packet and a measurement report to the transmitting node. Or a second sending submodule 322 adapted to send probe packets and measurement reports to the sending node.
In a specific implementation, the pairing apparatus 3 may further include an acknowledgement frame receiving module 33, which is adapted to receive an acknowledgement frame sent by the sending node after sending the measurement report to the sending node.
In a specific implementation, the pairing apparatus 3 may further include a pairing success receiving module 34 adapted to receive node pairing success information from the sending node after sending the measurement report to the sending node, where the node pairing success information is sent when the current node is determined to be a pairing node.
The measurement report may be 1 bit or multiple bits, and the number of bits increases with the increase of the number of the preset path loss thresholds.
For more details of the operation principle and the operation mode of the pairing apparatus 3, reference may be made to the above description in fig. 9, and details are not repeated here.
Further, the embodiment of the present invention further discloses a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the technical solutions of the methods in the embodiments shown in fig. 2 to fig. 9 are executed. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transient) memory. The computer readable storage medium may include ROM, RAM, magnetic or optical disks, and the like.
Further, an embodiment of the present invention further discloses a terminal, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the technical solution of the method in the embodiment shown in fig. 2 to 8 or 9 when executing the computer instructions. In particular, the terminal may be an access point or a station in a WLAN network.
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 (22)
1. A pairing method for asymmetric in-band full-duplex communication, comprising:
sending a group of trigger frames, wherein the group of trigger frames carries RU reporting indication information, the RU reporting indication information is used for indicating each first receiving node which carries out RU measurement and reports, and the group of trigger frames comprises at least one trigger frame; the group of trigger frames comprise a plurality of receiving nodes and time-frequency resource information of resource units uploaded and used by the receiving nodes, and the first receiving node is one part of the receiving nodes;
and receiving the measurement report sent by each first receiving node to determine a pairing node for asymmetric in-band full-duplex communication.
2. The pairing method of claim 1, wherein the set of trigger frames comprises two trigger frames, and wherein the sending the set of trigger frames comprises:
sending a first trigger frame;
receiving a PPDU packet sent by each second receiving node indicated by the first trigger frame, wherein the PPDU packet is selected from: an uplink OFDMA PPDU packet and an uplink MU-MIMO PPDU packet;
sending a second trigger frame, wherein the first trigger frame or the second trigger frame comprises the RU report indication information.
3. The pairing method of claim 1, wherein the set of trigger frames comprises two trigger frames, and wherein the sending the set of trigger frames comprises:
sending a first trigger frame;
sending a second trigger frame, wherein the first trigger frame or the second trigger frame comprises the RU report indication information.
4. The pairing method as claimed in claim 1, wherein each first receiving node is a full-duplex node, the set of trigger frames includes one trigger frame, and the sending of the set of trigger frames includes:
and sending a trigger frame comprising the RU report indication information.
5. The pairing method according to claim 4, wherein the receiving the measurement report sent by each first receiving node comprises:
receiving a PPDU packet and a measurement report sent by each first receiving node indicated by the trigger frame, wherein the PPDU packet is selected from: an uplink OFDMA PPDU packet and an uplink MU-MIMO PPDU packet.
6. The pairing method according to claim 4, wherein the receiving the measurement report sent by each first receiving node comprises:
and receiving the detection packet and the measurement report which are sent by each first receiving node and indicated by the trigger frame.
7. The pairing method according to any one of claims 1 to 6, further comprising, after receiving the measurement report sent by each first receiving node:
an acknowledgement frame is sent to each first receiving node.
8. The pairing method according to any one of claims 1 to 6, further comprising, after receiving the measurement report sent by each first receiving node:
and sending the node pairing success information to each pairing node.
9. Pairing method according to any one of claims 1 to 6, characterized in that the measurement report is 1 or more bits, the number of bits increasing with the number of preset path loss thresholds.
10. A pairing method for asymmetric in-band full-duplex communication, comprising:
receiving a group of trigger frames sent by a sending node, wherein the group of trigger frames carries RU report indication information which is used for indicating each first receiving node which carries out RU measurement and reports; the group of trigger frames comprise a plurality of receiving nodes and time-frequency resource information of resource units uploaded and used by the receiving nodes, and the first receiving node is one part of the receiving nodes;
and judging whether the current node is the first receiving node or not according to the RU report indication information, if so, executing measurement and sending a measurement report to the sending node so that the sending node determines a pairing node of asymmetric in-band full duplex communication according to the measurement report.
11. The pairing method according to claim 10, wherein the set of trigger frames includes two trigger frames, and wherein the receiving of the set of trigger frames sent by the sending node includes:
receiving a first trigger frame sent by the sending node;
determining whether the current node is a second receiving node according to the first trigger frame, if so, sending a PPDU packet to the sending node, wherein the PPDU packet is selected from: an uplink OFDMA PPDU packet and an uplink MU-MIMO PPDU packet;
and receiving an acknowledgement frame and a second trigger frame sent by the sending node, wherein the first trigger frame or the second trigger frame comprises the RU report indication information.
12. The pairing method according to claim 10, wherein the set of trigger frames includes two trigger frames, and wherein the receiving of the set of trigger frames sent by the sending node includes:
receiving a first trigger frame sent by the sending node;
determining whether the current node is a second receiving node according to the first trigger frame, and if so, sending a detection packet;
and receiving a second trigger frame sent by the sending node, wherein the first trigger frame or the second trigger frame comprises the RU report indication information.
13. The pairing method as claimed in claim 10, wherein each receiving node is a full duplex node, the set of trigger frames includes one trigger frame, and the receiving a set of trigger frames includes:
receiving a trigger frame including the RU report instruction information.
14. The pairing method of claim 13, wherein the sending the measurement report to the sending node comprises:
transmitting a PPDU packet and a measurement report to the transmitting node, the PPDU packet selected from: an uplink OFDMA PPDU packet and an uplink MU-MIMO PPDU packet.
15. The pairing method of claim 13, wherein the sending the measurement report to the sending node comprises:
sending a probe packet and a measurement report to the sending node.
16. The pairing method according to any one of claims 10 to 15, further comprising, after sending a measurement report to the sending node:
and receiving the acknowledgement frame sent by the sending node.
17. The pairing method according to any one of claims 10 to 15, further comprising, after sending a measurement report to the sending node:
receiving node pairing success information from the sending node, wherein the node pairing success information is sent when the current node is determined to be a pairing node.
18. Pairing method according to one of claims 10 to 15, characterized in that the measurement report is 1 or more bits, the number of bits increasing with the number of preset path loss thresholds.
19. A pairing apparatus for asymmetric in-band full duplex communication, comprising:
a sending module, adapted to send a set of trigger frames, where the set of trigger frames carries RU report instruction information, where the RU report instruction information is used to instruct each first receiving node that performs RU measurement and reports, and the set of trigger frames includes at least one trigger frame; the group of trigger frames comprise a plurality of receiving nodes and time-frequency resource information of resource units uploaded and used by the receiving nodes, and the first receiving node is one part of the receiving nodes;
and the receiving module is suitable for receiving the measurement report sent by each first receiving node so as to determine the paired nodes of the asymmetric in-band full-duplex communication.
20. A pairing apparatus for asymmetric in-band full duplex communication, comprising:
a receiving module, adapted to receive a group of trigger frames sent by a sending node, where the group of trigger frames carries RU report instruction information, and the RU report instruction information is used to instruct each first receiving node that performs RU measurement and reports; the group of trigger frames comprise a plurality of receiving nodes and time-frequency resource information of resource units uploaded and used by the receiving nodes, and the first receiving node is one part of the receiving nodes;
and the judging module is used for judging whether the current node is the first receiving node or not according to the RU report indication information, and if so, the judging module is suitable for executing measurement and sending a measurement report to the sending node so that the sending node determines a pairing node of asymmetric in-band full-duplex communication according to the measurement report.
21. A storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the method of any one of claims 1 to 9 or any one of claims 10 to 18.
22. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any one of claims 1 to 9 or any one of claims 10 to 18.
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| US20230007633A1 (en) * | 2019-12-09 | 2023-01-05 | Beijing Xiaomi Mobile Software Co., Ltd. | Resource allocation method, resource allocation apparatus and storage medium |
| CN111082914B (en) * | 2019-12-30 | 2020-12-01 | 华中科技大学 | OFDMA cross-carrier same-frequency full-duplex pairing method, terminal and storage medium |
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