CN117441402A - Reply control method, device, equipment and storage medium - Google Patents
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- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
- H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
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Abstract
A reply control method performed by STA MLD, which is NSTR STA MLD, STA MLD supporting n link communication, n being a positive integer greater than 1, comprising: under the condition that the first STA meets NSTR constraint conditions, the first STA in the STA MLD chooses not to reply to the target frame; wherein, the first STA is a STA corresponding to a first link of the n links, and the NSTR constraint condition includes: the first STA receives the target frame on the first link, and the target frame is a frame conforming to an immediate acknowledgement mechanism.
Description
The embodiment of the application relates to the technical field of communication, in particular to a reply control method, a reply control device, reply control equipment and a storage medium.
In the standard of wireless local area networks, functions that can support Multiple Links (Multiple Links) are defined. Two devices supporting the interconnection of the Multi-Link function, one being a Station (STA) Multi-Link Device (MLD) and one being an Access Point (AP) MLD, are defined in the standard for both ends of the communication. Any one of the links established between the STAMLD and APMLD corresponds to one of the STA MLD as a logical entity STA and also corresponds to one of the access points MLD as a logical entity AP.
For STA MLD, a Non-simultaneous transceiving (Non-Simultaneous Transmission and Reception, NSTR) STA MLD is defined. Upon receipt of a frame on one of the links of NSTRSTA MLD that meets the immediate acknowledgement mechanism, the STA MLD may determine whether the STA on that link meets the NSTR constraint (limited) condition, and if the STA meets the NSTR constraint, may choose not to reply to the frame.
Disclosure of Invention
The embodiment of the application provides a reply control method, device, equipment and storage medium. The technical scheme is as follows:
according to an aspect of the embodiments of the present application, there is provided a reply control method, the method being performed by an STA MLD, the STA MLD being NSTR STA MLD, the STA MLD supporting n link communications, the n being a positive integer greater than 1, the method comprising:
in the case that a first STA satisfies an NSTR constraint condition, the first STA in the STA MLD chooses not to reply to a target frame;
wherein the first STA is a STA corresponding to a first link of the n links, and the NSTR constraint includes: the first STA receives the target frame on the first link, and the target frame is a frame conforming to an immediate reply acknowledgement mechanism.
According to an aspect of the embodiments of the present application, there is provided a reply control device, the device is an NSTR device, the device supports n link communications, where n is a positive integer greater than 1, and the device includes: a reply module;
the reply module is configured to, when the first STA meets an NSTR constraint condition, select not to reply to the target frame by the first STA;
wherein the first STA is a STA corresponding to a first link of the n links, and the NSTR constraint includes: the first STA receives the target frame on the first link, and the target frame is a frame conforming to an immediate reply acknowledgement mechanism.
According to one aspect of embodiments of the present application, there is provided a STAMLD, the STAMLD being NSTR STAMLD, the STAMLD supporting n-link communication, the n being a positive integer greater than 1, the STAMLD comprising a transceiver;
the transceiver is configured to, if a first STA meets an NSTR constraint condition, select not to reply to a target frame by the first STA in the STA MLD;
wherein the first STA is a STA corresponding to a first link of the n links, and the NSTR constraint includes: the first STA receives the target frame on the first link, and the target frame is a frame conforming to an immediate reply acknowledgement mechanism.
According to an aspect of the embodiments of the present application, there is provided a computer-readable storage medium having stored therein a computer program for execution by a processor to implement the above reply control method.
According to an aspect of the embodiments of the present application, there is provided a chip including programmable logic circuits and/or program instructions for implementing the above-described recovery control method when the chip is running.
According to an aspect of the embodiments of the present application, there is provided a computer program product or a computer program, the computer program product or computer program comprising computer instructions stored in a computer readable storage medium, from which a processor reads and executes the computer instructions to implement the above-mentioned reply control method.
The technical scheme provided by the embodiment of the application can bring the following beneficial effects:
NSTR STA MLD when a target frame is received on the first link, if the first STA corresponding to the first link meets the NSTR constraint condition, the first STA may choose not to reply, where the NSTR constraint condition includes: the first STA receives the target frame in the first link, and the target frame is a frame conforming to the immediate response acknowledgement mechanism, compared with the traditional NSTR constraint condition that the received frame is only an RTS frame, further, an implementation manner that the RTS frame is not replied is selected, and the RTS frame is expanded to a wider range of target frames conforming to the immediate response acknowledgement mechanism, such as: the data frame increases the possibility that the first STA chooses not to reply to the received frame, so as to avoid interference of reply actions of the first STA to the frame transceiving sequences of STAs on other links.
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a wireless local area network according to one embodiment of the present application;
fig. 2 is a schematic diagram of an uplink procedure between NSTR STAMLD and APMLD provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of STAMLD select Clear To Send (CTS) frames provided by one embodiment of the present application;
FIG. 4 is a schematic diagram of STAMLD selecting not to reply to a CTS frame provided by one embodiment of the present application;
FIG. 5 is a schematic diagram of a STAMLD reply ACK frame provided by one embodiment of the present application;
FIG. 6 is a schematic diagram of STAMLD selecting not to reply to a CTS frame provided by one embodiment of the present application;
FIG. 7 is a schematic diagram of a STAMLD reply CTS frame provided by one embodiment of the present application;
FIG. 8 is a flow chart of a reply control method provided by one embodiment of the present application;
FIG. 9 is a flow chart of a reply control method provided by one embodiment of the present application;
FIG. 10 is a schematic diagram of STAMLD select not to reply to an ACK frame provided by one embodiment of the present application;
FIG. 11 is a schematic diagram of a STAMLD reply CTS frame provided by one embodiment of the present application;
FIG. 12 is a schematic diagram of STAMLD selecting not to reply to a CTS frame provided by one embodiment of the present application;
FIG. 13 is a block diagram of a reply control device provided by one embodiment of the present application;
FIG. 14 is a schematic diagram of the structure of a STAMLD provided in one embodiment of the present application.
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.
Referring to fig. 1, a block diagram of a wireless local area network according to an exemplary embodiment of the present application is shown, where the wireless local area network may include: STAMLD10 and AP MLD 20.
The STAMLD10 includes one or more logic entities STA, which may be a wireless communication chip, a wireless sensor, or a wireless communication terminal. Such as a mobile phone supporting wireless fidelity (Wireless Fidelity, wiFi) communication functions, a tablet computer supporting WiFi communication functions, a set top box supporting WiFi communication functions, a smart television supporting WiFi communication functions, a smart wearable device supporting WiFi communication functions, a vehicle communication device supporting WiFi communication functions, and a computer supporting WiFi communication functions.
The AP MLD 20 includes one or more logical entities AP. The AP may be an access point for a mobile user to enter a wired network, and is mainly deployed in a home, a building, or a campus, where a typical coverage radius is several tens meters to hundreds meters, and of course, may be deployed outdoors. The AP is equivalent to a bridge connecting a wired network and a wireless network, and mainly serves to connect each wireless network client together and then access the wireless network to the ethernet. Specifically, the AP may be a terminal device or a network device with a WiFi chip.
In the embodiment of the present application, a multilink is established between the STA MLD10 and the AP MLD 20. Illustratively, there is a link 1 and a link 2 between the STA MLD10 and the AP MLD 20, the STA MLD10 includes: STA1 and STA2, the AP MLD 20 includes: AP1 and AP2, STA1 and STA2 perform data transmission with AP1 and AP2, respectively, that is, AP1 and AP2 are peer-to-peer logical entities of STA1 and STA2, respectively, and their corresponding links are link 1 and link 2, respectively.
In the embodiment of the present application, both STA MLD 10 and AP MLD 20 support the 802.11 standard. It can be understood that the STA MLD 10 and the AP MLD 20 in the embodiments of the present application may also support the evolution standard of the 802.11 standard, and may also support other communication standards. For example, support for 802.11be, etc., and subsequent versions.
Before the technical scheme of the application is introduced, some technical knowledge related to the application is introduced and explained.
In the relevant standards, functions are defined that can support multiple links. One is STA MLD and one is APMLD, as defined in the standard for both ends of communication. The multi-link STA MLD and APMLD established mutually can utilize the advantages of the multi-link to transmit and receive data on a plurality of links so as to achieve the advantages of high throughput/low time delay and the like.
For two devices supporting the interconnection of the multi-link functions (Multiple Links Operation, MLO), a NSTR STAMLD is defined. In such a device supporting multiple links, due to limitations of Radio Frequency (RF) and the like, when one link is transmitting (transmission), mutual interference (in-device interference) is caused in the device, and the other link cannot perform normal reception (reception), so that data cannot be independently and simultaneously transmitted and received over multiple links, that is, if such NSTR STAMLD device wants to use multiple links simultaneously, it is necessary to transmit or receive simultaneously over multiple links.
Illustratively, as shown in fig. 2, there is an UpLink (UL) procedure between NSTR STAMLD and APMLD, NSTR STAMLD includes STA1 and STA2, APMLD includes AP1 and AP2, STA1 and AP1 correspond to one link, STA2 and AP2 correspond to one link, and in an ideal case, the transmissions of NSTRSTA MLD on the two links are aligned together and the receptions are aligned together.
Because in 802.11be multi-link operation, transmission or reception between multiple links cannot be aligned together due to the length of a data packet, different physical rates of different links, etc., so that a process that a certain link is transmitting or receiving is encountered, another link needs to transmit, and then it needs to be considered that the expected transmission under the link will not interfere with the link that is transmitting or receiving, so that the link cannot transmit or receive normally.
In 802.11, there is a transmission conforming to an immediate acknowledgement mechanism (Immediate Acknowledgement Procedure) procedure in which, when a certain device receives a frame of some type of a peer device, the device needs to immediately reply to the peer device with an acknowledgement after receiving the frame, at a minimum inter-frame space (Short Interframe Space, SIFS) time. For example, a Request To Send (RTS) frame is received, and if the condition is satisfied, a CTS frame needs to be immediately replied; upon receipt of a data frame, an immediate acknowledgement (Ack) or block acknowledgement (Block Acknowledgement, BA) frame is required.
Under the NSTR multilink of NSTRSTA MLD, the current standard adds NSTR constraints to these transmissions that meet the immediate acknowledgement mechanism because the transmission of one NSTR link may interfere with the reception on another NSTR link.
The current determination NSTRSTA MLD is whether the STA on a certain NSTR link is of the type NSTR constraint (limited) and needs to satisfy the following three NSTR constraint conditions simultaneously:
1. the link where this STA is located belongs to an NSTR link pair (link pairs) in NSTRSTA MLD, that is, the link where this STA is located and one or more other links in NSTR STA MLD cannot be simultaneously transceived.
2. This STA receives an RTS frame on the link described in 1.
3. For the other link or links forming the NSTR link pair with the link on which the STA is located, the STAs on those other link or links are in a transmission opportunity (Transmission Opportunity, txOP) owner (holder) role or a TxOP responder (responder) role.
According to the requirement of the current protocol, when a certain STA receives an RTS frame, if the rule condition that a CTS frame can be replied in the standard 802.11 is met, the STA is required to reply the CTS frame immediately if the STA does not meet the NSTR constraint condition; if the STA satisfies the NSTR constraint, it is required that the STA may choose to reply to the CTS frame or not reply to the CTS frame.
Illustratively, as shown in fig. 3, link 1 and link 2 of NSTRSTA MLD are NSTR links, when STA1 on link 1 is in the TxOP holder, i.e., STA1 is in the process of obtaining a TxOP duration (duration), an RTS frame is received on link 2, and STA2 on link 2 is not expected to reply to the CTS frame even if the rule condition that CTS frames can be recovered in reference 802.11 (i.e., the RTS/CTS mechanism in the 802.11 protocol before 802.11 be) is satisfied, because STA2 on link 2 is satisfied with the NSTR constraint, STA2 on link 2 may choose not to reply to the CTS frame to avoid interfering with the reception on link 1.
Illustratively, as shown in fig. 4, link 1 and link 2 of NSTRSTA MLD are NSTR links, when STA1 on link 1 is in a TxOP responder, STA2 on link 2 receives an RTS frame, and even if the rule condition that can reply to a CTS frame in reference 802.11 is satisfied, STA2 on link 2 may choose not to reply to a CTS frame because STA2 on link 2 satisfies the NSTR constraint, so as not to interfere with the reception on link 1.
During the evolution of the current standard, discussion is in: the same requirement is made for NSTRSTA MLD to reply to an ACK/BA frame on some NSTR link. That is, when a STA on a certain NSTR link on NSTR STA MLD needs to immediately reply to an ACK/BA frame, it needs to see whether the STA on this link currently meets the NSTR constraint, and if the NSTR constraint is not met, it must immediately reply to the ACK/BA frame; if NSTR constraints are met, either an ACK/BA frame may be selected for reply or an ACK/BA frame may be selected for not reply.
Under the existing mechanism, because it is determined whether the STA on a certain NSTR link meets the NSTR constraint, it is required that the STA receives an RTS frame; but it is obvious that when the STA needs to reply to the ACK/BA frame, the corresponding received frame must not be the RTS frame, and the NSTR constraint condition cannot be satisfied.
Illustratively, as shown in fig. 5, link 1 and link 2 of NSTRSTA MLD are NSTR links, when STA1 on link 1 is in the TxOP holder, a non-RTS frame is received on link 2, and STA2 on link 2 does not satisfy the NSTR constraint, so STA2 on link 2 needs to immediately reply to an ACK frame, and the transmission of the ACK frame may interfere with the reception on link 1.
In the existing mechanism, because it is determined whether the STA on a certain NSTR link satisfies the NSTR constraint, it makes a determination when the RTS frame is received. In practice, however, since there is a certain time interval between the reply CTS frame and the receipt of the RTS frame, for example, there is at least SIFS time (16 us), there are the following cases: upon receipt of the RTS frame, the STA on the other NSTR link is the TxOP owner or TxOP responder, but upon reply to the CTS frame, the STA on the other NSTR link has already finished with the TxOP owner or TxOP responder role.
Illustratively, as shown in fig. 6, STA1 on link 1 has finished its role as TxOP owner before STA2 on link 2 expects to reply to the CTS frame, but may abort replying to the CTS frame because the RTS frame was received while STA1 was still in the TxOP owner, resulting in STA2 determining that the NSTR constraint is met.
In existing mechanisms, because determining whether an STA on a certain NSTR link meets the NSTR constraint requires determining whether STAs on other NSTR links are in the TxOP owner or the TxOP responder. But according to the definition in the current reference 802.11 regarding the TxOP holder and the TxOP responder, it is the case that the STA is not involved in receiving frames that do not need to reply, such as the STA is receiving multicast or broadcast frames, or the STA is receiving frames that do not need to reply to ACK/BA, when the STA is neither the TxOP holder nor the TxOP responder.
For example, as shown in fig. 7, for STA1 in NSTR STAMLD, when it receives a broadcast frame on link 1, STA2 on link 2 receives an RTS frame, because STA2 does not satisfy the NSTR constraint at this time, STA2 requires that CTS must be recovered immediately in accordance with the existing mechanism under the rule that CTS can be recovered in standard 802.11. This results in the transmission of a CTS frame by STA2 that interferes with the reception of the broadcast frame at STA 1.
In this embodiment of the present application, when the NSTR STA MLD receives the target frame on the first link, if the first STA corresponding to the first link meets the NSTR constraint condition, the first STA may choose not to reply, where the NSTR constraint condition includes: the first STA receives the target frame in the first link, and the target frame is a frame conforming to the immediate response acknowledgement mechanism, compared with the traditional NSTR constraint condition that the received frame is only an RTS frame, further, an implementation manner that the RTS frame is not replied is selected, and the RTS frame is expanded to a wider range of target frames conforming to the immediate response acknowledgement mechanism, such as: the data frame increases the possibility that the first STA chooses not to reply to the received frame, so as to avoid interference of reply actions of the first STA to the frame transceiving sequences on other links.
The following describes the technical scheme of the application through several embodiments.
Referring to fig. 8, a flowchart of a reply control method according to an embodiment of the present application is shown. The method can be applied to the wireless local area network shown in fig. 1. The method may comprise the steps of:
step 802: a first AP in the AP MLD transmits a target frame to a first STA in the STA MLD over a first link.
The AP MLD in the embodiment of the present application supports n link communications, where n is a positive integer greater than 1. That is, in the embodiment of the present application, a plurality of links are established between the STA MLD and the AP MLD, including: first to nth links. The AP MLD includes logic entities AP corresponding to the n links one by one, for example: the first link corresponds to a first AP in the AP MLD and the nth link corresponds to nAP in the AP MLD.
Step 804: a first STA in the STA MLD receives the target frame over the first link.
Step 806: under the condition that the first STA meets NSTR constraint conditions, the first STA in the STA MLD chooses not to reply to the target frame; wherein, the first STA is a STA corresponding to a first link of the n links, and the NSTR constraint condition includes: a target frame is received at the first link and is a frame conforming to an immediate reply acknowledgement mechanism.
In the embodiment of the application, STA MLD supports n link communication, where n is a positive integer greater than 1. That is, in the embodiment of the present application, a plurality of links are established between the STA MLD and the AP MLD, including: first to nth links. The STA MLD includes logic entities STA corresponding to the n links one to one, for example: the first link corresponds to a first STA in the STA MLD and the nth link corresponds to an nth STA in the STA MLD.
In the embodiment of the present application, the STA MLD is NSTR STA MLD, NSTR STA MLD, which means that the STA MLD cannot independently and simultaneously transmit and receive data on multiple links, and if multiple links are to be used simultaneously, it is necessary to simultaneously transmit or simultaneously receive data on multiple links.
In the embodiment of the present application, a first STA on a first link of the n links determines whether an NSTR constraint condition is satisfied, and if the NSTR constraint condition is satisfied, the first STA chooses not to reply to the received target frame. Alternatively, the first STA may also choose to reply to the received target frame if the NSTR constraint is met.
It can be understood that, since the STA MLD in the embodiment of the present application is NSTR STA MLD, data cannot be independently and simultaneously received and transmitted on multiple links, if other links are receiving, the first STA does not reply to the received target frame, so that interference to the reception on other links can be avoided.
The NSTR constraint is a condition for the STA in the STA MLD to determine whether to observe the immediate reply acknowledgement mechanism (Immediate Acknowledgement Procedure). In the case that the NSTR constraint is met, the STA may choose not to reply, i.e., not follow the immediate reply acknowledgement mechanism; in the case where the NSTR constraint is not satisfied, the STA needs to make an immediate reply acknowledgement, i.e., obey the immediate reply acknowledgement mechanism. The instant reply acknowledgement mechanism refers to a mechanism that a receiving end needs to reply to a transmitting end immediately after receiving a frame sent by the transmitting end.
In an embodiment of the present application, the NSTR constraint includes: the first STA receives a target frame on the first link, and the target frame is a frame conforming to an immediate reply acknowledgement mechanism. Optionally, the NSTR constraint includes other constraints, which will be described in the following embodiments, and will not be described herein.
It will be appreciated that, based on conventional implementations, the NSTR constraint includes restrictions on the type of target frame received, e.g., RTS frames need to be received on the first link, which are frames that conform to the immediate acknowledgement mechanism. Whereas in the present embodiment, the NSTR constraint includes: the first STA receives the target frame on the first link, and the target frame is a frame conforming to the immediate acknowledgement mechanism, and the NSTR constraint does not include a restriction on the type of target frame received.
Optionally, the target frame includes: RTS frames and other frames that require immediate acknowledgement. Accordingly, the frame replying to the target frame includes: CTS frame, ACK frame, and BA frame. Other frames requiring immediate acknowledgement refer to other types of frames that conform to the immediate acknowledgement mechanism in addition to the RTS frame.
For example, when the first STA receives the RTS frame on the first link, the first STA satisfies that the first STA in the NSTR constraint condition receives the target frame on the first link, and the target frame is a frame conforming to the immediate acknowledgement mechanism, and also satisfies other NSTR constraint conditions, the first STA chooses not to reply to the CTS frame to the RTS frame.
For example, when the first STA receives the data frame on the first link, the first STA satisfies that the first STA in the NSTR constraint condition receives the target frame on the first link, and the target frame is a frame conforming to the immediate acknowledgement mechanism, and also satisfies other NSTR constraint conditions, the first STA chooses not to reply to the ACK frame to the data frame.
For example, when the first STA receives the data frame on the first link, the first STA satisfies that the first STA in the NSTR constraint condition receives the target frame on the first link, and the target frame is a frame conforming to the immediate acknowledgement mechanism, and also satisfies other NSTR constraint conditions, the first STA chooses not to reply the BA frame to the data frame.
In summary, in the method provided in this embodiment, NSTR STA MLD, when the target frame is received on the first link, if the first STA corresponding to the first link meets the NSTR constraint condition, the first STA may choose not to reply, where the NSTR constraint condition includes: the first STA receives the target frame in the first link, and the target frame is a frame conforming to the immediate response acknowledgement mechanism, compared with the traditional NSTR constraint condition that the received frame is only an RTS frame, further, an implementation manner that the RTS frame is not replied is selected, and the RTS frame is expanded to a wider range of target frames conforming to the immediate response acknowledgement mechanism, such as: the data frame increases the possibility that the first STA chooses not to reply to the received frame, so as to avoid interference of reply actions of the first STA to the frame transceiving sequences of STAs on other links.
In the exemplary embodiment, when determining whether a STA on a certain NSTR link meets the NSTR constraint, it is necessary to consider the case that other STAs are receiving frames that do not need to reply, and the present application provides for two possible implementations for this purpose.
In one possible implementation, besides the condition that the first STA receives the target frame on the first link and that the target frame is a frame that conforms to the immediate acknowledgement mechanism, the NSTR constraint includes the following two conditions:
condition 1: the first link belongs to one NSTR link pair in NSTR STA MLD.
That is, the first link is one of the NSTR link pair. Wherein, NSTR link pair includes at least two links that can not independently transmit and receive data simultaneously.
For example, NSTR STA MLD is established with links 1, 2 and 3, where links 1 and 2 belong to one NSTR link pair, and links 1 and 2 cannot independently transmit and receive data simultaneously.
Condition 2: the second STA on the at least one second link is a transmission opportunity owner or a transmission opportunity responder or in a state of receiving frames that do not need to reply.
The second link is any other NSTR link in the NSTR link pair to which the first link belongs. Alternatively, in the case where the NSTR link pair includes two NSTR links, the second link is another link other than the first link.
That is, the first STA considers that the condition 2 is satisfied in a case where any one of the following 3 cases is satisfied: STAs on the other links in the NSTR link pair are transmission opportunity owners; STAs on the other links in the NSTR link pair are transmission opportunity responders; STAs on the other links in the NSTR link pair are in a state of receiving frames that do not need to be replied.
Wherein, the transmission opportunity owner means that the STA obtains a transmission opportunity through channel contention; a transmission opportunity responder refers to a STA receiving a frame in a sequence of frames (frame exchange sequence) from the transmission opportunity owner and the STA needs to reply to the frame.
Wherein, the state of receiving the frame without reply means that the STA is receiving a frame without reply. Optionally, the frame that does not require a reply includes at least one of: multicasting the frame; broadcasting a frame; frames that do not require an ACK reply; no frames of the reply BA are needed.
In the above implementation, for the case that other STAs are receiving frames that do not need to be replied, the definition of the conventional NSTR constraint is modified, specifically: the condition 2 is added that the other STAs are receiving frames that do not need to be replied, so that when the other STAs are receiving frames that do not need to be replied, the first STA also considers that the NSTR constraint condition is satisfied, and further may choose not to reply immediately.
In another possible implementation, the STA MLD performs the following steps: in the case that the first STA meets the NSTR constraint condition, or there is a state that the third STA on at least one third link is in a state of receiving a frame that does not need to be replied, the first STA in the STA MLD chooses not to reply to the target frame; the third link is any other NSTR link in the NSTR link pair to which the first link belongs. Optionally, in the case where the NSTR link pair includes two NSTR links, the third link is another link other than the first link.
Wherein, the state of receiving the frame without reply means that the STA is receiving a frame without reply. Optionally, the frame that does not require a reply includes at least one of: multicasting the frame; broadcasting a frame; frames that do not require an ACK reply; no frames of the reply BA are needed.
Optionally, in the foregoing implementation, the NSTR constraint includes, in addition to a condition that the first STA receives the target frame on the first link and that the target frame is a frame that conforms to the immediate acknowledgement mechanism, the following two conditions:
condition 1: the first link belongs to one NSTR link pair in NSTR STA MLD.
That is, the first link is one of the NSTR link pair. The NSTR link pair comprises at least two links which cannot independently and simultaneously transmit and receive.
Condition 2: the fourth STA on the at least one fourth link is the transmission opportunity owner or transmission opportunity responder.
The fourth link is any other NSTR link in the NSTR link pair to which the first link belongs. Optionally, in the case where the NSTR link pair includes two NSTR links, the fourth link is another link other than the first link.
That is, the first STA considers that the condition 2 is satisfied in a case where any one of the following 2 cases is satisfied: STAs on the other links in the NSTR link pair are transmission opportunity owners; STAs on the other links in the NSTR link pair are transmission opportunity responders.
In the above implementation, for the case that the other STAs are receiving the frame that does not need to be replied, the definition of the conventional NSTR constraint is not further modified, but it is separately determined whether the other STAs are receiving the frame that does not need to be replied, and then the first STA may also choose not to reply immediately when the other STAs are receiving the frame that does not need to be replied.
In summary, in the method provided in this embodiment, when the first STA determines whether to select whether to perform immediate reply confirmation on the received frame, the situation that other STAs are receiving frames that do not need to reply is considered, so that interference of the reply behavior of the first STA on the frame transceiving sequences of STAs on other links is further avoided.
In the exemplary embodiment, in order to ensure the accuracy of the determination, a time point at which whether the first STA satisfies the NSTR constraint condition is selected as a time point at which the first STA expects to reply to the target frame.
Referring to fig. 9, a flowchart of a reply control method according to an embodiment of the present application is shown. The method can be applied to the wireless local area network shown in fig. 1. The method may comprise the steps of:
step 902: a first AP in the AP MLD transmits a target frame to a first STA in the STA MLD over a first link.
Step 904: a first STA in the STA MLD receives the target frame over the first link.
Step 906: at a point in time when the first STA expects to reply to the target frame, it is determined whether the first STA on the first link satisfies the NSTR constraint.
Wherein, the first STA is a STA corresponding to a first link of the n links, and the NSTR constraint condition includes: the first STA receives a target frame on the first link, and the target frame is a frame conforming to an immediate reply acknowledgement mechanism.
In practice, the first STA will generally be separated by a period of time after receiving the target frame, for example: SIFS time, thereby reaching a point in time at which the first STA expects to reply to the target frame. In this embodiment, at a point in time when the first STA expects to reply to the target frame, it is determined whether the first STA satisfies the NSTR constraint.
It will be appreciated that, based on conventional implementations, it will be determined whether the first STA satisfies the NSTR constraint at the point in time when the target frame is received. In this embodiment, the time point of the judgment is delayed to the time point that the first STA expects to reply to the target frame, so as to avoid that the state of other links changes to affect the accuracy of the judgment in the time period from the time point of receiving the target frame to the time point of expecting to reply.
Step 908: under the condition that the first STA meets NSTR constraint conditions, the first STA in the STA MLD chooses not to reply to the target frame; wherein, the first STA is a STA corresponding to a first link of the n links, and the NSTR constraint condition includes: a target frame is received at the first link and is a frame conforming to an immediate reply acknowledgement mechanism.
The embodiment of this step can be referred to above 806, and will not be described here again.
In summary, the method provided in this embodiment delays the time point when the NSTR constraint condition is met to the time point when the first STA expects to reply to the target frame, and because whether to reply is selected after the judgment, compared with the traditional time point when the target frame is received, the influence of state changes of other links on judgment accuracy in the time period from the time point when the target frame is received to the time point when the reply is expected is avoided, and it can be more accurately judged that the reply behavior on the first link will not interfere with the frame transceiving sequences on other links, thereby improving the air interface utilization ratio.
The method embodiments described above are described below in connection with the following examples.
Illustratively, as shown in fig. 10, link 1 and link 2 of NSTR STA MLD are NSTR links, when STA1 on link 1 is in the TxOP holder, and when a non-RTS frame is received on link 2, STA2 on link 2 satisfies the NSTR constraint, so STA2 on link 2 may choose not to reply to the ACK frame to avoid interfering with the reception on link 1.
As shown in fig. 11, for example, link 1 and link 2 of NSTR STA MLD are NSTR links, and the time point when STA2 on link 2 determines whether it satisfies the NSTR constraint is: STA2 expects to reply immediately to the point in time of the acknowledgement, i.e. the point in time when the CTS frame is expected to be sent in the figure, at which time STA1 on link 1 has finished functioning as the TxOP holder, so STA2 judges that it does not meet the NSTR constraint and will still reply to the CTS frame normally.
As shown in fig. 12, for example, link 1 and link 2 of NSTR STA MLD are NSTR links, STA1 on link 1 is receiving a broadcast frame, STA2 on link 2 determines that STA1 is receiving a broadcast frame when expecting to reply to a CTS frame, and STA2 may choose not to reply to the CTS frame in order to avoid interfering with the reception of STA 1.
It will be appreciated that the above method embodiments may be implemented alone or in combination, and are not limited in this application.
It can be understood that the above method embodiment may be implemented as a reply control method on the STA MLD side alone or as a reply control method on the AP MLD side alone.
The following are device embodiments of the present application, which may be used to perform method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.
Referring to fig. 13, a block diagram of a reply control device according to an embodiment of the present application is shown. The device has the function of realizing the method example, and the function can be realized by hardware or can be realized by executing corresponding software by hardware. The apparatus may be the STA MLD described above, or may be provided in the STA MLD. The device is an NSTR device that supports n-link communications, where n is a positive integer greater than 1. As shown in fig. 13, the apparatus 1300 may include: a reply module 1310;
the reply module 1310 is configured to, if the first STA meets the NSTR constraint condition, select not to reply to the target frame by the first STA;
Wherein the first STA is a STA corresponding to a first link of the n links, and the NSTR constraint includes: the first STA receives the target frame on the first link, and the target frame is a frame conforming to an immediate reply acknowledgement mechanism.
In an alternative embodiment, the NSTR constraint further comprises:
the first link belongs to one NSTR link pair in the NSTR device;
the second STA on the at least one second link is a transmission opportunity owner or a transmission opportunity responder or in a state of receiving a frame without reply;
wherein the second link is any other NSTR link in the NSTR link pair to which the first link belongs.
In an optional embodiment, the reply module 1310 is configured to, in a case where the first STA meets the NSTR constraint condition, or there is a third STA on at least one third link in a state of receiving a frame that does not need to be replied, select not to reply to the target frame by the first STA;
wherein the third link is any other NSTR link in the NSTR link pair to which the first link belongs.
In an alternative embodiment, the NSTR constraint further comprises:
The first link belongs to one NSTR link pair in the NSTR device;
the fourth STA on the at least one fourth link is a transmission opportunity owner or transmission opportunity responder;
wherein the fourth link is any other NSTR link in the NSTR link pair to which the first link belongs.
In an alternative embodiment, the reply-free frame includes at least one of:
multicasting the frame;
broadcasting a frame;
frames that do not require an ACK reply;
no frames of the reply BA are needed.
In an alternative embodiment, the apparatus further comprises: a judging module;
the judging module is configured to judge, at a time point when the first STA expects to reply to the target frame, whether the first STA on the first link meets the NSTR constraint condition.
In an alternative embodiment, the target frame includes: RTS frames and other frames that require immediate acknowledgement.
It should be noted that, when the apparatus provided in the foregoing embodiment performs the functions thereof, only the division of the respective functional modules is used as an example, in practical application, the foregoing functional allocation may be performed by different functional modules according to actual needs, that is, the content structure of the device is divided into different functional modules, so as to perform all or part of the functions described above.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
Referring to FIG. 14, a schematic diagram of a STAMLD structure is shown, according to one embodiment of the present application. The STAMLD may include: processor 1401, receiver 1402, transmitter 1403, memory 1404 and bus 1405.
The processor 1401 includes one or more processing cores, and the processor 1401 executes various functional applications and scoreboard-like updates by running software programs and modules.
The receiver 1402 and the transmitter 1403 may be implemented as one transceiver 1406, and the transceiver 1406 may be a communication chip.
The memory 1404 is connected to the processor 1401 by a bus 1405.
The memory 1404 may be used for storing a computer program, and the processor 1401 is used for executing the computer program to implement the steps executed by the terminal device in the above-described method embodiment.
Further, memory 1404 may be implemented by any type or combination of volatile or nonvolatile storage devices including, but not limited to: random-Access Memory (RAM) and Read-Only Memory (ROM), erasable programmable Read-Only Memory (EPROM), electrically erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), flash Memory or other solid state Memory technology, read-Only optical disk (Compact Disc Read-Only Memory, CD-ROM), high density digital video disk (Digital Video Disc, DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices.
In this embodiment, the transceiver 1406 is configured to, in a case where a first STA meets an NSTR constraint condition, select not to reply to a target frame by the first STA in the STA MLD;
wherein the first STA is a STA corresponding to a first link of the n links, and the NSTR constraint includes: the first STA receives the target frame on the first link, and the target frame is a frame conforming to an immediate reply acknowledgement mechanism.
In an alternative embodiment, the NSTR constraint further comprises:
the first link belongs to one NSTR link pair in the NSTR device;
the second STA on the at least one second link is a transmission opportunity owner or a transmission opportunity responder or in a state of receiving a frame without reply;
wherein the second link is any other NSTR link in the NSTR link pair to which the first link belongs.
In an optional embodiment, the transceiver 1406 is configured to, when the first STA meets the NSTR constraint, or when there is a third STA on at least one third link in a state of receiving a frame that does not need to be replied, select not to reply to the target frame by the first STA;
Wherein the third link is any other NSTR link in the NSTR link pair to which the first link belongs.
In an alternative embodiment, the NSTR constraint further comprises:
the first link belongs to one NSTR link pair in the NSTR device;
the fourth STA on the at least one fourth link is a transmission opportunity owner or transmission opportunity responder;
wherein the fourth link is any other NSTR link in the NSTR link pair to which the first link belongs.
In an alternative embodiment, the reply-free frame includes at least one of:
multicasting the frame;
broadcasting a frame;
frames that do not require an ACK reply;
no frames of the reply BA are needed.
In an alternative embodiment, the processor 1401 is configured to determine, at a point in time when the first STA expects to reply to the target frame, whether the first STA on the first link satisfies the NSTR constraint.
In an alternative embodiment, the target frame includes: RTS frames and other frames that require immediate acknowledgement.
The embodiment of the application also provides a computer readable storage medium, wherein the storage medium stores a computer program, and the computer program is used for being executed by a STAMLD processor to realize the reply control method.
Alternatively, the computer-readable storage medium may include: read-Only Memory (ROM), random-Access Memory (RAM), solid state disk (Solid State Drives, SSD), or optical disk, etc. The random access memory may include resistive random access memory (Resistance Random Access Memory, reRAM) and dynamic random access memory (Dynamic Random Access Memory, DRAM), among others.
The embodiment of the application also provides a chip, which comprises a programmable logic circuit and/or program instructions and is used for realizing the recovery control method when the chip runs on STAMLD.
Embodiments of the present application also provide a computer program product or computer program comprising computer instructions stored in a computer readable storage medium from which a STAMLD processor reads and executes the computer instructions to implement the above-described reply control method.
The processor in the embodiment of the application comprises: an application specific integrated circuit (Application Specific Integrated Circuit, ASIC).
It should be understood that, in the embodiments of the present application, the "indication" may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B.
In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct correspondence or an indirect correspondence between the two, or may indicate that there is an association between the two, or may indicate a relationship between the two and the indicated, configured, or the like.
References herein to "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
In addition, the step numbers described herein are merely exemplary of one possible execution sequence among steps, and in some other embodiments, the steps may be executed out of the order of numbers, such as two differently numbered steps being executed simultaneously, or two differently numbered steps being executed in an order opposite to that shown, which is not limited by the embodiments of the present application.
Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The foregoing description of the exemplary embodiments of the present application is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and scope of the invention.
Claims (18)
- A reply control method, performed by a station multi-link device, STA, MLD, the STA MLD being non-concurrently transceptible NSTR STA MLD, the STA MLD supporting n-link communications, the n being a positive integer greater than 1, the method comprising:in the case that a first STA satisfies an NSTR constraint condition, the first STA in the STA MLD chooses not to reply to a target frame;wherein the first STA is a STA corresponding to a first link of the n links, and the NSTR constraint includes: the first STA receives the target frame on the first link, and the target frame is a frame conforming to an immediate reply acknowledgement mechanism.
- The method of claim 1, wherein the NSTR constraint further comprises:said first link belongs to one NSTR link pair in said NSTRSTA MLD;the second STA on the at least one second link is a transmission opportunity owner or a transmission opportunity responder or in a state of receiving a frame without reply;Wherein the second link is any other NSTR link in the NSTR link pair to which the first link belongs.
- The method according to claim 1, wherein the method further comprises:in the case that the first STA meets the NSTR constraint condition, or there is a third STA on at least one third link in a state of receiving a frame that does not need to be replied, the first STA in the STA MLD chooses not to reply to the target frame;wherein the third link is any other NSTR link in the NSTR link pair to which the first link belongs.
- The method of claim 3, wherein the NSTR constraint further comprises:said first link belongs to one NSTR link pair in said NSTRSTA MLD;the fourth STA on the at least one fourth link is a transmission opportunity owner or transmission opportunity responder;wherein the fourth link is any other NSTR link in the NSTR link pair to which the first link belongs.
- The method of any of claims 2 to 4, wherein the reply-free frame comprises at least one of:multicasting the frame;broadcasting a frame;frames that do not require a reply acknowledgement ACK;There is no need to reply to the frame of the block acknowledgment BA.
- The method according to any one of claims 1 to 5, further comprising:and at the time point when the first STA expects to reply to the target frame, judging whether the first STA on the first link meets the NSTR constraint condition.
- The method according to any one of claims 1 to 6, wherein,the target frame includes: request to send RTS frames and other frames that require immediate acknowledgement.
- A reply control device, wherein the device is an NSTR device that is not capable of transmitting and receiving simultaneously, the device supporting n link communications, n being a positive integer greater than 1, the device comprising: a reply module;the reply module is configured to, when the first STA meets an NSTR constraint condition, select not to reply to the target frame by the first STA;wherein the first STA is a STA corresponding to a first link of the n links, and the NSTR constraint includes: the first STA receives the target frame on the first link, and the target frame is a frame conforming to an immediate reply acknowledgement mechanism.
- The apparatus of claim 8, wherein the NSTR constraint further comprises:The first link belongs to one NSTR link pair in the NSTR device;the second STA on the at least one second link is a transmission opportunity owner or a transmission opportunity responder or in a state of receiving a frame without reply;wherein the second link is any other NSTR link in the NSTR link pair to which the first link belongs.
- The apparatus of claim 8, wherein the device comprises a plurality of sensors,the reply module is configured to, when the first STA meets the NSTR constraint condition, or there is a state that a third STA on at least one third link is in a state of receiving a frame that does not need to reply, select not to reply to the target frame by the first STA;wherein the third link is any other NSTR link in the NSTR link pair to which the first link belongs.
- The apparatus of claim 10, wherein the NSTR constraint further comprises:the first link belongs to one NSTR link pair in the NSTR device;the fourth STA on the at least one fourth link is a transmission opportunity owner or transmission opportunity responder;wherein the fourth link is any other NSTR link in the NSTR link pair to which the first link belongs.
- The apparatus according to any of claims 9 to 11, wherein the reply-free frame comprises at least one of:multicasting the frame;broadcasting a frame;frames that do not require a reply acknowledgement ACK;there is no need to reply to the frame of the block acknowledgment BA.
- The apparatus according to any one of claims 8 to 12, further comprising: a judging module;the judging module is configured to judge, at a time point when the first STA expects to reply to the target frame, whether the first STA on the first link meets the NSTR constraint condition.
- The device according to any one of claims 8 to 13, wherein,the target frame includes: request to send RTS frames and other frames that require immediate acknowledgement.
- A station multi-link device STAMLD, wherein said STAMLD is non-simultaneouslytransceptible NSTRSTAMLD, said STAMLD supporting n-link communications, said n being a positive integer greater than 1, said STAMLD comprising a transceiver;the transceiver is configured to, if a first STA meets an NSTR constraint condition, select not to reply to a target frame by the first STA in the STA MLD;wherein the first STA is a STA corresponding to a first link of the n links, and the NSTR constraint includes: the first STA receives the target frame on the first link, and the target frame is a frame conforming to an immediate reply acknowledgement mechanism.
- A computer-readable storage medium, in which a computer program is stored for execution by a processor to implement the reply control method of any one of claims 1 to 7.
- A chip comprising programmable logic circuits and/or program instructions for implementing a recovery control method according to any one of claims 1 to 7 when said chip is running.
- A computer program product or computer program comprising computer instructions stored in a computer readable storage medium, from which a processor reads and executes the computer instructions to implement the reversion control method according to any one of claims 1 to 7.
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| PCT/CN2021/115141 WO2023024106A1 (en) | 2021-08-27 | 2021-08-27 | Reply control method and apparatus, device, and storage medium |
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