WO2017197606A1

WO2017197606A1 - Transmission method, access point, and site

Info

Publication number: WO2017197606A1
Application number: PCT/CN2016/082508
Authority: WO
Inventors: 乔登宇; 禄·彼得; 丁志明; 林英沛
Original assignee: 华为技术有限公司
Priority date: 2016-05-18
Filing date: 2016-05-18
Publication date: 2017-11-23
Also published as: CN109076633A; CN109076633B

Abstract

The invention provides a transmission method, access point, and site. The transmission method includes: the access point (AP) transmitting a direct link transmission period establishment message, the direct link transmission period establishment message carrying direct link transmission period duration information and direct link indicator information, the direct link indicator information being used to indicate T scheduled direct links, where T ≥ 1; and before the time designated in the duration information ends and when the AP receives direct link transmission end indication information transmitted from all direct link sites within the T scheduled direct links, the AP transmitting a transmission period end indication message, where the direct link transmission end indication information is used to indicate the corresponding direct link has completed transmission and the transmission period end indication message is used to end the direct link transmission period. The transmission method, access point, and station of the invention can improve channel utilization.

Description

Transmission method, access point and site

Technical field

The present invention relates to the field of communications, and in particular, to a transmission method, an access point, and a station.

Background technique

Wireless Fidelity (WiFi) is a wireless LAN technology based on the IEEE 802.11 standard of the Institute of Electrical and Electronics Engineers (IEEE), which will be a personal computer (Personal Computer, PC), user equipment. Terminals such as (User Equipment, UE) form a computer network in a wireless manner, and these terminals constituting the computing network may be referred to as WiFi devices. WiFi devices can be divided into access points (APs) and user sites. The user site may also be referred to simply as a station (Station, STA). The AP and its associated STAs can form a Basic Service Set (BSS).

Direct Link is an important technology of WiFi, and its purpose is to improve the efficiency of bandwidth usage. When two STAs establish a direct link, they can directly transmit data between them without going through the AP. Such a STA can be called a direct link site. STAs that do not establish a direct link can be called. Indirect link site. A direct link can reduce the number of occupations of the same bandwidth from twice to once. Sites that transmit data over a direct link form a direct link.

In the prior art, there is an enhanced direct link method in a high-density scenario. The method includes: during a direct link transmission period, the AP can schedule multiple direct links to simultaneously transmit data, thereby further improving system efficiency. The direct link transmission period refers to the transmission period used only by the scheduled direct link. Other stations do not allow data transmission during the direct link transmission period, that is, remain silent. The other sites mentioned above refer to sites other than the sites of the scheduled direct link.

In the prior art, in a direct link cycle, a direct link site may complete transmission in advance, but other sites may only transmit data after a direct link cycle, which results in a direct link. The transmission channel is not fully utilized during the period from the completion of the transmission to the direct link link period.

Summary of the invention

The transmission method, the access point and the station provided by the invention can improve the channel usage rate.

In a first aspect, the present invention provides a transmission method, including: an AP transmitting a direct link transmission a periodic setup message, where the direct link transmission period setup message carries duration information of the direct link transmission period and direct link indication information, where the direct link indication information is used to indicate the scheduled T straight Connected to the link, T≥1; before the end of the time corresponding to the duration information, when the AP receives the direct connection sent by the station of each directly connected link in the scheduled T directly connected links When the link transmission end indication information, the AP sends a transmission period end indication message, where the direct link transmission end indication information is used to indicate that the corresponding direct link has completed transmission, and the transmission period end indication message is used for Ending the direct link transmission cycle.

In the embodiment of the present invention, the AP receives the direct link transmission end indication information sent by the STA of the scheduled direct link before the end of the direct link transmission period, and according to the direct link transmission end indication information All STAs send a transmission period end message, so that all STAs know that the direct link transmission period has ended, and can use the channel for transmission, so that before the end of the direct link transmission period and when all direct link transmissions are ended, The channel usage is improved.

In a possible implementation manner, the direct link transmission end indication information includes identifier information of a corresponding direct link.

In the embodiment of the present invention, the direct link transmission end indication information passes the identifier of the direct link where the STA that terminates the direct link transmission is located, so that the AP learns the directly connected link that has ended the transmission.

In a possible implementation, the direct link transmission end indication information is carried in the first message, and the frame type information carried by the first message is the same as the frame type information of the CF-End frame.

In the embodiment of the present invention, the message carrying the direct link transmission end indication information may multiplex the frame type of the CF-End frame.

In a possible implementation manner, the direct link transmission end indication information is carried in a signaling domain of the second message.

In the embodiment of the present invention, the direct link transmission end indication information may be carried by a message including only the preamble sequence domain and the signaling domain.

In a possible implementation manner, the signaling domain is HE-SIG-A or HE-SIG-B, and the HE-SIG-A or HE-SIG-B carries the direct link transmission end indication information.

In a possible implementation manner, the transmission period end message is a CF-End frame, and the duration period of the transmission period end message is 0.

In the embodiment of the present invention, the transmission period end message is carried by the CF-End frame to fully use the existing frame resource.

In a possible implementation manner, the direct link indication information includes the scheduled T The identification information of each directly connected link in the direct link or the group identification information of the scheduled T directly connected links.

In a possible implementation manner, the direct link transmission end indication information further includes cause information, where the direct link transmission end indication information is further used to indicate that the direct link is completed by using the cause information. The reason for the transmission.

In the embodiment of the present invention, the AP may know the reason why the direct link ends the transmission, so as to perform subsequent operations according to the reason.

In a second aspect, the present invention provides a transmission method, including: receiving, by a STA, a direct link transmission period setup message sent by an AP, where the direct link transmission period setup message carries duration information of a direct link transmission period And directly connecting the link indication information, where the direct link indication information is used to indicate the scheduled T directly connected links, where the T≥1; the STA receives the transmission period end indication message sent by the AP, The transmission period end indication message is used to end the direct link transmission period.

In the embodiment of the present invention, the STA receives the direct link transmission end message sent by the AP before the end of the direct link transmission period, so that before the end of the direct link transmission period and when all the direct link transmissions are ended, The STA can use the channel for transmission, that is, increase the channel usage rate.

In a possible implementation manner, the direct link where the STA is located is a direct link in the scheduled T directly connected links, where the STA receives the transmission sent by the AP. Before the end of the period indication message, the transmission method further includes: when the linear link where the STA is located has no pending data, the STA sends a direct link transmission end indication information to the AP, the direct link The path transmission end indication information is used to indicate that the direct link of the STA is completed.

In the embodiment of the present invention, when the STA has no data transmission before the end of the direct link transmission period, the STA sends the direct link transmission end indication information to the AP, so that the AP can send the direct link transmission end indication information to all STAs according to the direct link transmission end indication information. The transmission period end message, so that all STAs know that the direct link transmission has ended, and can use the channel for transmission, so that the channel usage rate can be made before the end of the direct link transmission period and when all the direct link transmissions are ended. Improved.

In a possible implementation manner, the direct link transmission end indication information includes identifier information of a direct link where the STA is located.

In a possible implementation manner, the direct link transmission end indication information is carried in the first message, and the frame type information carried by the first message is the same as the frame type information of the CF-End frame of the contention free period end.

In a possible implementation manner, the signaling domain includes a high-efficiency signaling indication field HE-SIG-A or HE-SIG-B, and the HE-SIG-A or HE-SIG-B carries the straight Link transmission end indication information.

In a possible implementation manner, the direct link indication information includes identifier information of each directly connected link in the scheduled T directly connected links or the scheduled T directly connected links. Group identification information of the road.

In a third aspect, the present invention provides an AP, the AP comprising a module for performing the transmission method of the first aspect.

In a fourth aspect, the present invention provides a STA, the STA comprising a module for performing the transmission method of the second aspect.

In a fifth aspect, the present invention provides an AP, the AP including a memory, a processor, and a transceiver. The memory is for storing a program, the processor is for executing a program, and the transceiver is for communicating with a STA. When the program is executed, the processor invokes the transceiver to perform the method of the first aspect.

In a sixth aspect, the present invention provides a STA, the STA device including a memory, a processor, and a transceiver, the memory for storing a program, the processor for executing a program, and the transceiver for communicating with an AP . When the program is executed, the processor invokes the transceiver to perform the method of the second aspect.

In a seventh aspect, the present invention provides a communication system comprising the AP of the third aspect, and the STA of the fourth aspect.

In an eighth aspect, the present invention provides a computer readable medium storing program code for execution by an AP, the program code comprising instructions for performing the method of the first aspect.

In a ninth aspect, the present invention provides a computer readable medium storing the computer readable medium Program code for STA execution, the program code comprising instructions for performing the method of the second aspect.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a schematic diagram of direct link transmission and indirect link transmission according to an embodiment of the present invention.

2 is a schematic diagram of a direct link transmission period according to an embodiment of the present invention.

FIG. 3 is a schematic flowchart of a transmission method according to an embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a CF-End frame according to an embodiment of the present invention.

FIG. 5 is a schematic structural diagram of an enhanced CF-End frame according to an embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a data frame according to an embodiment of the present invention.

FIG. 7 is a schematic structural diagram of an AP according to an embodiment of the present invention.

FIG. 8 is a schematic flowchart of a STA according to an embodiment of the present invention.

FIG. 9 is a schematic structural diagram of an AP according to an embodiment of the present invention.

FIG. 10 is a schematic flowchart of a STA according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

For a better understanding of the embodiments of the present invention, the direct link and the indirect link, and the direct link transmission period involved in the embodiment of the present invention are described below with reference to FIG. 1 and FIG.

As shown in FIG. 1, if the STA 120 needs to send data to the STA 140, the STA 120 needs to first send a data frame to the AP 130 through the uplink, and then the AP 130 sends a corresponding uplink to the STA 140 through the downlink. Data frame. That is, data transmission between STA 120 and STA 140 needs to be forwarded by AP 130. However, when the STA 110 and the STA 150 establish a link directly, that is, After establishing a direct link, STA 110 can send data frames directly to STA 150. In the embodiment of the present invention, a site that has established a direct link is called a direct link site, such as STA 110 and STA 150, and a site that does not establish a direct link is called a non-directly connected link site, such as STA 120. And STA 140, the indirect link includes an uplink and a downlink.

Before the direct link transmission (such as STA 110 and STA 150) performs direct transmission, the AP may send a direct link transmission period setup message, and the direct link transmission period setup message is used to establish a direct link transmission period and Indicates the directly connected link being scheduled. During the direct link transmission cycle, other sites remain silent, ie no transmission. Here, other stations refer to stations other than the stations of the scheduled direct link (such as STA 120 and STA 140).

FIG. 2 is a schematic diagram of a direct link transmission period according to an embodiment of the present invention. The same reference numerals in FIG. 2 as those in FIG. 1 denote the same meanings, and details are not described herein again.

As shown in FIG. 2, the STA 120 can only occupy a channel to transmit a data frame to the AP 130 after the direct link transmission period ends, or the AP 130 transmits a data frame to the STA 140. In the direct link transmission period, the direct transmission between STA 110 and STA 150 may be transmitted in advance. That is, the direct link transmission period has not ended yet, but the direct connection between STAs has been completed. At this time, the channel idle period occurs in the direct link transmission period, that is, the channel will not be used by other stations until the direct connection transmission of the scheduled direct link is completed until the end of the direct link transmission period. As a result, the channel resources are wasted, and the channel usage rate is lowered. Therefore, the embodiment of the present invention proposes a transmission method that can improve channel usage.

FIG. 3 is an exemplary flowchart of a transmission method according to an embodiment of the present invention. It should be understood that FIG. 3 illustrates steps or operations of the transmission method, but these steps or operations are merely examples, and embodiments of the present invention may perform other operations or variations of the various operations in FIG. Moreover, the various steps in FIG. 3 may be performed in a different order than that presented in FIG. 3, and it is possible that not all operations in FIG. 3 are to be performed.

The STA 302 may be the STA 110 in FIG. 1, the AP 304 may be the AP 130 in FIG. 1, the STA 306 may be the STA 150 in FIG. 1, and the STA 308 may be the STA 120 or the STA 140 in FIG.

S310, the AP 304 sends a direct link transmission period setup message, and the STA 302, the STA 306, and the STA 308 receive a direct link transmission period setup message, thereby establishing a direct link transmission period, and the direct link transmission period setup message includes The duration of the direct connection transmission period and the direct link indication information, the direct link indication information is used to indicate the scheduled T directly connected links, and T is an integer greater than or equal to 1.

The direct link transmission period refers to the transmission period in which the direct link can be directly connected. During the direct link transmission period, the AP 304 may specify one or more direct links for direct connection transmission through the direct link indication information, or may allow the direct link station to perform direct connection transmission through contention. In the embodiment of the present invention, the direct link that can be directly connected to the AP 304 is referred to as the scheduled direct link in the direct link transmission period. The scheduled direct link may be all direct links or partial direct links.

Optionally, the direct link transmission period setup message may further include channel allocation information of the scheduled direct link. According to the channel allocation resource, the scheduled direct link performs direct transmission on the allocated channel.

Optionally, the plurality of directly connected links that are scheduled may share the same channel or the used channels partially overlap, but the link power may be used as the transmit power for direct transmission, so that multiple direct transmissions do not overlap each other. Interference. The link power is lower than or equal to the full transmit power, which can be specified by the AP.

The direct link indication information may include identification information of each directly connected link of the scheduled T directly connected links or group identification information of the scheduled T directly connected links, that is, the AP 304 passes through The link transmission period setup message carries the identifier of the direct link to notify the STA which direct links are scheduled direct links.

The duration of the direct link transmission period may be carried in the signaling indication domain or the Media Access Control (MAC) part of the physical header of the direct link transmission period setup message, so that other stations are directly connected. No transmission is performed during the transmission period, that is, it remains silent. Other sites are sites outside the site of the scheduled direct link.

The AP 306 sends both a direct link transmission period setup message to the direct link site (e.g., STA 302 and STA 306) and a direct link transmission period setup message to the non-direct link site (e.g., STA 308).

After receiving the direct link transmission period setup message, the direct link station can determine whether to include the direct link or the direct link group identifier of the direct link transmission period establishment message. Perform direct connection transmission. If not included, set the Network Allocation Vector (NAV) according to the duration of the direct link transmission period; the non-directly connected link station directly depends on the duration of the direct link transmission period. Time Set Network Allocation Vector (NAV).

After receiving the direct link transmission period setup message, the STA 302 and the STA 306 determine, according to the identifier of the direct link or the direct link group where the direct link transmission period establishment message is located, Perform direct link transmission. After receiving the direct link transmission period setup message, the STA 308 sets the NAV according to the duration of the direct link transmission period. The STA 308 can then operate in accordance with the NAV. When the value of NAV is non-zero, STA 308 does not transmit, ie remains silent.

Optionally, the direct link transmission period setup message may be a control frame or a management frame or a data frame. Optionally, the transmit power of the direct link transmission period setup message may be full power.

S312, the STA 302 sends a direct connection transmission frame to the STA 306, and the STA 306 receives the direct connection transmission frame sent by the STA 302.

Optionally, the transmit power of the direct transmission frame may be link power.

Optionally, when the STA 302 has no data transmission, the direct transmission frame sent by the STA 302 to the STA 306 may include indication information indicating that the STA 302 has no pending data.

S314. After receiving the direct transmission frame sent by the STA 302, the STA 306 sends an acknowledgement frame to the STA 302, and the STA 302 receives the acknowledgement frame sent by the STA 306.

Optionally, the transmit power of the acknowledgement frame may be link power.

S316, the STA 306 sends a direct connection transmission frame to the STA 302, and the STA 302 receives the direct connection transmission frame sent by the STA 306.

Optionally, the transmit power of the direct transmission frame is link power.

Optionally, when the STA 306 does not have data transmission, the direct transmission frame sent by the STA 306 to the STA 302 may include indication information indicating that the STA 306 has no pending data.

S318. After receiving the direct transmission frame sent by the STA 306, the STA 302 sends an acknowledgement frame to the STA 306, and the STA 306 receives the acknowledgement frame sent by the STA 302.

Optionally, the transmit power of the acknowledgement frame may be link power.

The above S312 to S318 can be repeatedly executed.

S320, in the direct link transmission period, when the STA 306 has no pending data, the STA 306 may send the direct connection transmission end indication information to the AP 304, and the AP 304 receives the direct connection transmission end indication information sent by the STA 306. Of course, the STA 306 may also send the direct connection transmission end indication information to the AP 304 if the direct connection transmission is ended for other reasons.

S322, in the direct link transmission period, when the STA 302 has no pending data transmission, the STA 302 may also send the direct connection transmission end indication information to the AP 304, and the AP 304 receives the direct connection transmission end indication information sent by the STA 302. Of course, the STA 302 may also send the direct connection transmission end indication information to the AP 304 if the direct connection transmission is ended for other reasons.

It should be noted that the STA 302 receives the indication that the STA 306 has not sent data sent by the STA 306. After the transmission frame is directly connected, and the STA 302 has no data transmission, the STA 302 may send the direct connection transmission end indication information indicating that the transmission of the direct link where the STA 302 is located has been sent to the AP 304. Alternatively, after the STA 306 receives the direct transmission frame sent by the STA 302 indicating that the STA 302 has no data transmission, and the STA 306 has no data transmission, the STA 306 may send the AP 304 the transmission indicating that the direct link of the STA 306 is located. The completed direct transmission end indication message. Or both the STA 302 and the STA 306 send the direct connection transmission end indication information to the AP 304. For example, the STA 302 and the STA 306 can respectively send the direct connection transmission end indication information to the AP 304 when they do not directly transmit the data.

Optionally, the direct link transmission end indication information may further include cause information, where the cause information is used to indicate the reason why the direct link completes the transmission.

Optionally, the transmit power of the STA 302 and/or the STA 306 that sends the direct transmission end indication information may be full power.

S324, before the end of the duration of the transmission period, when the AP 304 collects the direct link transmission end indication information sent by the station of each directly connected link in the scheduled T direct links, the AP may broadcast and send. The transmission period end message, the STA receives the transmission period end message.

If the AP 304 only schedules a direct link, the AP 304 may send a transmission period end message after receiving the direct connection end indication information of the direct link; if the AP 304 schedules multiple direct links Then, the AP 304 receives the direct transmission end indication information of all the scheduled direct links to send the transmission period end message.

The AP 304 may receive the direct link transmission indication information sent by any one of the directly connected links of the scheduled T directly connected links, or may receive each of the scheduled T directly connected links. Direct link transmission indication information sent by two stations of the direct link.

The AP may broadcast a transmission transmission period end message, that is, release the channel, so that these STAs can use the channel for data transmission.

Alternatively, the transmission power of the transmission period end message may be full power.

In the embodiment of the present invention, when the STA ends the direct link transmission before the end of the direct link transmission period, the STA sends the direct link transmission end indication information to the AP, indicating that the transmission of the direct link of the STA is completed. When the AP obtains the direct link transmission end indication information of all the scheduled direct links, the AP may broadcast the transmission transmission period end message, so that the STA knows that the direct link transmission period has ended, and the channel can be used for transmission. Therefore, the channel usage rate can be improved before the end of the direct link transmission period and when all the direct link transmissions are completed.

Optionally, in the embodiment of the present invention, the direct connection end indication information may be a message in a different format. carry. The following describes an example of a message carrying a direct transmission end indication message.

A message carrying the direct transmission end indication information may be an enhanced CF-End frame, that is, adding a new domain or multiplexing an existing domain based on an existing CF-End frame.

The structure of the CF-End frame will be described below with reference to FIG. As shown in FIG. 4, the CF-End frame includes a frame control domain, a duration, a destination address, a Basic Service Set (BSS) identity (ID), and a check digit. The frame control field may include a Type, a Subtype, a More Fragments, a Retry, a Power Management, More Data, and a Protected Frame. Subdomains such as Frame) and Order.

A schematic structure of the enhanced CF-End of the embodiment of the present invention is shown in FIG. 5.

As shown in FIG. 5, the MAC header of the enhanced CF-End according to the embodiment of the present invention is based on a domain including a frame control domain, a duration, a destination address, a BSS ID, and a check digit of the existing enhanced CF-End. It may also include a direct link identification field and/or an end cause field.

The value of the Type and/or Subtype subfield in the frame control domain of the enhanced CF-End frame may be the same as the existing CF-End frame. The direct link identifier field is used to record the identification information of the directly connected link that has been transmitted, and the end reason field is used to record the reason for the end of the direct link transmission.

In the embodiment of the present invention, the BSSID field of the enhanced CF-End frame may be set to the MAC address of the AP, and the destination address field may be set to the MAC address of the AP or the MAC address of the peer station of the directly connected link.

After receiving the enhanced CF-End frame, the AP may identify that the direct transmission end indication information belongs to the BSS according to the BSSID field. Optionally, when the destination address field is set to the MAC address of the direct link site, the AP may identify the direct link of the direct connection end indication information. Optionally, when the direct connection end indication information includes the direct link identifier, the AP may identify the direct link to which the direct transmission end indication information belongs. Optionally, when the direct connection end indication information includes the end cause information, the AP may identify the reason for the end of the direct connection transmission.

Different from the duration field in the existing CF-End frame being set to 0, the duration of the enhanced CF-End frame may be the remaining time of the direct transmission period.

Since the enhanced CF-End is a management frame, the original indication uses of the More Fragments, Retry, More Data, Protected Frame, and Order subfields have no practical meaning. Therefore, optionally, the enhanced CF-End can be used in the above. Any sub-domain carries indication information for indicating whether a direct link identifier field or an end cause field exists in the MAC part.

The message carrying the direct transmission end indication information may also be a new control frame or a management frame carrying, that is, the Type and Subtype subfields of the frame control domain of the control frame or the management frame may be set to an existing undefined value, and other information. It may be the same as the information in the enhanced CF-End frame described above as the direct transmission end indication information.

A message carrying a direct transmission end indication information may be a null data packet (NDP), that is, a frame including only a preamble sequence and a signaling domain.

As shown in FIG. 6, the physical header of the null data frame includes only the preamble sequence and the signaling domain. The signaling domain may in turn include an old signaling domain and a new signaling domain. The new signaling domain may include a sub-domain such as a basic service set color (BSS Color), a direct transmission end indication information indicating bit, and a direct link identifier. Of course, the new signaling domain may also include an end cause field of the direct link.

Alternatively, the new signaling domain may be a High Efficiency Signaling Indicator Domain A (HE-SIG-A) or a High Efficiency Signaling Indicator Domain B (HE-SIG-B).

After receiving the null data frame sent by the STA, the AP may identify that the frame is a direct transmission end indication information according to the direct connection end indication information indication bit, and identify that the direct transmission end indication information belongs to the local according to the BSS Color field. BSS.

Optionally, the AP may identify the direct link of the direct connection end indication information according to the direct link identifier. Optionally, when the direct connection end indication information includes the end cause information, the AP may identify the reason for the end of the direct connection transmission according to the end cause field.

In the embodiment of the present invention, optionally, the transmission period end message may be a CF-End frame as shown in FIG. The information carried in the domain of the frame control domain, the destination address, the BSSID, and the check bit of the CF-End frame carrying the transmission period end message may be the same as that of the existing CF-End frame, and the duration domain of the CF-End frame may be Set to 0.

After receiving the CF-End frame, the STA 306 can know that the STA 306 can use the channel according to its duration field being 0.

The data transmission method and the related frame structure in the transmission method of the embodiment of the present invention are described above with reference to FIG. 3 to FIG. 6. The AP and the implementation of the transmission method shown in FIG. 3 according to the embodiment of the present invention are described below with reference to FIG. 7 to FIG. STA.

FIG. 7 is a schematic structural diagram of an AP according to an embodiment of the present invention. The AP in FIG. 7 is capable of implementing the steps performed by the AP in FIG. The AP 700 shown in FIG. 7 includes a first transmitting module 710 and a second transmitting module 720.

The first sending module 710 is configured to send a direct link transmission period establishment message, where the direct link The path transmission period setup message carries duration information of the direct link transmission period and direct link indication information, and the direct link indication information is used to indicate the scheduled T directly connected links, T≥1.

a second sending module 720, configured to: when the AP receives the direct connection sent by the station of each direct link in the scheduled T direct links before the time corresponding to the duration information ends And transmitting, by the link transmission end indication message, a transmission period end indication message, where the direct link transmission end indication information is used to indicate that the corresponding direct link has completed transmission, and the transmission period end indication message is used to end the Direct link transmission cycle.

The AP of the embodiment of the present invention receives the direct link transmission end indication information sent by the STA of the scheduled direct link before the end of the direct link transmission period, and according to the direct link transmission end indication information All STAs send a transmission period end message, so that all STAs know that the direct link transmission period has ended, and can use the channel for transmission, so that before the end of the direct link transmission period and when all direct link transmissions are ended, The channel usage is improved.

Optionally, as an embodiment, the direct link transmission end indication information includes identifier information of the corresponding direct link.

Optionally, as an embodiment, the direct link transmission end indication information is carried in the first message, and the frame type information carried by the first message is the same as the frame type information of the CF-End frame of the contention free period end.

Optionally, as an embodiment, the direct link transmission end indication information is carried in a signaling domain of the second message, where the second message includes a preamble sequence field and the signaling domain.

Optionally, as an embodiment, the signaling domain includes a high efficiency signaling indication field HE-SIG-A or HE-SIG-B, and the HE-SIG-A or HE-SIG-B carries the straight Link transmission end indication information.

Optionally, as an embodiment, the transmission period end message is a CF-End frame, and the duration of the transmission period end message is 0.

Optionally, as an embodiment, optionally, as an embodiment, the direct link indication information includes identifier information or a location of each directly connected link in the scheduled T directly connected links. The group identification information of the scheduled T directly connected links.

Optionally, as an embodiment, the direct link transmission end indication information further includes cause information, where the direct link transmission end indication information is further used to indicate that the direct link is completed by using the cause information. The reason for the transmission.

FIG. 8 is a schematic structural diagram of an STA according to an embodiment of the present invention. The STA in Figure 8 can implement the graph. The steps performed by the STA in 3. The STA 800 shown in FIG. 8 includes a first receiving module 810 and a second, receiving module 820.

The first receiving module 810 is configured to receive a direct link transmission period setup message sent by the access point AP, where the direct link transmission period setup message carries duration information of the direct link transmission period and a direct link. Instructing information, the direct link indication information is used to indicate the scheduled T directly connected links, where T≥1.

The second receiving module 820 is configured to receive a transmission period end indication message sent by the AP, where the transmission period end indication message is used to end the direct link transmission period.

The STA of the embodiment of the present invention sends the direct link transmission end indication information to the AP when the data is not transmitted before the end of the direct link transmission period, so that the AP can send the direct link transmission end indication information to all STAs according to the direct link transmission end indication information. The transmission period end message, so that all STAs know that the direct link transmission has ended, and can use the channel for transmission, so that the channel usage rate can be made before the end of the direct link transmission period and when all the direct link transmissions are ended. Improved.

Optionally, as an embodiment, the direct link where the STA is located is a direct link in the scheduled T directly connected links, where the STA further includes a sending module, where the sending The module is configured to send, after the second receiving module receives the transmission period end indication message sent by the AP, a direct link transmission end indication to the AP when the linear link where the STA is located has no pending data. The direct link transmission end indication information is used to indicate that the direct link where the STA is located has completed transmission.

Optionally, as an embodiment, the direct link transmission end indication information includes identifier information of a direct link where the STA is located.

Optionally, as an embodiment, the direct link indication information includes identifier information of each direct link in the scheduled T directly connected links or the scheduled T directly connected links. Group identification information of the road.

FIG. 9 is a schematic structural diagram of an AP according to an embodiment of the present invention. The AP in FIG. 9 is capable of implementing the steps performed by the AP in FIG. The AP 900 shown in FIG. 9 includes a memory 910, a processor 920, and a transceiver 930.

The memory 910 is configured to store a program.

The processor 920 is configured to execute a program in the memory 910. The processor 920 is configured to invoke the transceiver 930 when the program is executed.

The transceiver 930 is configured to send a direct link transmission period setup message, where the direct link transmission period setup message carries duration information of the direct link transmission period and direct link indication information, and the direct link The indication information is used to indicate the scheduled T directly connected links, T≥1.

The transceiver 930 is further configured to: when the AP receives the direct link sent by the station of each direct link in the scheduled T direct link before the time corresponding to the duration information ends And transmitting a transmission period end indication message, where the direct link transmission end indication information is used to indicate that the corresponding direct link has completed transmission, and the transmission period end indication message is used to end the direct connection. Link transmission period.

Optionally, as an embodiment, the direct link transmission end indication information is carried in the second A signaling domain of the message, the second message including a preamble sequence field and the signaling domain.

FIG. 10 is a schematic structural diagram of a STA according to an embodiment of the present invention. The STA in FIG. 10 is capable of implementing the steps performed by the STA in FIG. The STA 1000 shown in FIG. 10 includes a memory 1010, a processor 1020, and a transceiver 1030.

The memory 1010 is configured to store a program.

The processor 1020 is configured to execute a program in the memory 1010. The processor 1020 is configured to invoke the transceiver 1030 when the program is executed.

The transceiver 1030 is configured to receive a direct link transmission period setup message sent by the access point AP, where the direct link transmission period setup message carries duration information of the direct link transmission period and direct link indication information. The direct link indication information is used to indicate the scheduled T directly connected links, where T≥1.

The transceiver 1030 is further configured to receive a transmission period end indication message sent by the AP, where the transmission period end indication message is used to end the direct link transmission period.

Optionally, as an embodiment, the direct link in which the STA is located is a direct link in the scheduled T directly connected links; wherein the transceiver 1030 is further configured to be in the second Receiving module Before receiving the transmission period end indication message sent by the AP, when the linear link where the STA is located has no pending data, the direct link transmission end indication information is sent to the AP, and the direct link transmission ends. The indication information is used to indicate that the direct link where the STA is located has completed transmission.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative For example, the division of the unit is only a logical function division, and the actual implementation may have another division manner, for example, multiple units or components may be combined or may be integrated into another system, or some features may be Ignore, or not execute. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

A transmission method, comprising:

The access point AP sends a direct link transmission period setup message, where the direct link transmission period setup message carries duration information of the direct link transmission period and direct link indication information, and the direct link indication The information is used to indicate the T directly connected links, T≥1;

Before the end of the time corresponding to the duration information, when the AP receives the direct link transmission end indication information sent by the station of each of the directly connected links of the scheduled T direct links, Sending, by the AP, a transmission period end indication message, where the direct link transmission end indication information is used to indicate that the corresponding direct link has completed transmission, and the transmission period end indication message is used to end the direct link transmission cycle.
The transmission method according to claim 1, wherein the direct link transmission end indication information comprises identification information of a corresponding direct link.
The transmission method according to claim 1 or 2, wherein the direct link transmission end indication information is carried in the first message, and the frame type information carried in the first message and the contention free period end CF-End The frame type information of the frame is the same.
The transmission method according to claim 1 or 2, wherein the direct link transmission end indication information is carried in a signaling domain of the second message.
The transmission method according to claim 4, wherein the signaling domain comprises a high efficiency signaling indication field HE-SIG-A or HE-SIG-B, the HE-SIG-A or HE-SIG- B carries the direct link transmission end indication information.
The transmission method according to any one of claims 1 to 5, wherein the transmission period end message is a CF-End frame, and the duration of the transmission period end message is 0.
The transmission method according to any one of claims 1 to 6, wherein the direct link indication information includes identification information of each directly connected link among the scheduled T directly connected links. Or the group identification information of the scheduled T directly connected links.
The transmission method according to any one of claims 1 to 7, wherein the direct link transmission end indication information further includes cause information, wherein the direct link transmission end indication information is further used for The cause information is used to indicate the reason why the direct link completes the transmission.
A transmission method, comprising:

The STA receives the direct link transmission period setup message sent by the access point AP, and the direct link transmission period setup message carries the duration information of the direct link transmission period and the direct link. Instructing information, the direct link indication information is used to indicate the scheduled T directly connected links, where T≥1;

The STA receives a transmission period end indication message sent by the AP, and the transmission period end indication message is used to end the direct link transmission period.
The transmission method according to claim 9, wherein the direct link in which the STA is located is a direct link in the scheduled T directly connected links;

The transmission method further includes: before the STA receives the transmission period end indication message sent by the AP, the transmission method further includes:

When the linear link where the STA is located has no data to be sent, the STA sends a direct link transmission end indication information to the AP, where the direct link transmission end indication information is used to indicate that the STA is located. The direct link has completed the transfer.
The transmission method according to claim 10, wherein the direct link transmission end indication information includes identification information of a direct link in which the STA is located.
The transmission method according to claim 10 or 11, wherein the direct link transmission end indication information is carried in the first message, and the frame type information carried in the first message and the contention free period end CF-End The frame type information of the frame is the same.
The transmission method according to claim 10 or 11, wherein the direct link transmission end indication information is carried in a signaling domain of the second message.
The transmission method according to claim 13, wherein said signaling domain comprises a high efficiency signaling indication field HE-SIG-A or HE-SIG-B, said HE-SIG-A or HE-SIG- B carries the direct link transmission end indication information.
The transmission method according to any one of claims 9 to 14, wherein the transmission period end message is a CF-End frame, and the duration of the transmission period end message is 0.
The transmission method according to any one of claims 9 to 15, wherein the direct link indication information includes identification information of each of the directly connected links of the scheduled T directly connected links. Or the group identification information of the scheduled T directly connected links.
The transmission method according to any one of claims 9 to 16, wherein the direct link transmission end indication information further includes cause information, wherein the direct link transmission end indication information is further used for The cause information is used to indicate the reason why the direct link completes the transmission.
An access point AP, comprising:

a first sending module, configured to send a direct link transmission period setup message, where the direct link transmission is performed The transmission period setup message carries the duration information of the direct link transmission period and the direct link indication information, where the direct link indication information is used to indicate the scheduled T directly connected links, T≥1;

a second sending module, configured to: when the AP receives the direct link sent by the station of each direct link in the scheduled T direct links before the time corresponding to the duration information ends And transmitting a transmission period end indication message, where the direct link transmission end indication information is used to indicate that the corresponding direct link has completed transmission, and the transmission period end indication message is used to end the straight Link transmission cycle.
The AP according to claim 18, wherein the direct link transmission end indication information comprises identification information of a corresponding direct link.
The AP according to claim 18 or 19, wherein the direct link transmission end indication information is carried in the first message, and the frame type information carried in the first message and the contention free period end CF-End frame The frame type information is the same.
The AP according to claim 18 or 19, wherein the direct link transmission end indication information is carried in a signaling domain of the second message.
The AP according to claim 21, wherein said signaling domain comprises a high efficiency signaling indication field HE-SIG-A or HE-SIG-B, said HE-SIG-A or HE-SIG-B Carrying the direct link transmission end indication information.
The AP according to any one of claims 18 to 22, wherein the transmission period end message is a CF-End frame, and the duration of the transmission period end message is 0.
The AP according to any one of claims 18 to 23, wherein the direct link indication information includes identification information of each of the directly connected links of the scheduled T direct links or The group identification information of the scheduled T direct links.
The AP according to any one of claims 18 to 24, wherein the direct link transmission end indication information further includes cause information, wherein the direct link transmission end indication information is further used to pass The cause information indicates the reason why the direct link completes the transmission.
A station STA, characterized in that it comprises:

a first receiving module, configured to receive a direct link transmission period setup message sent by the access point AP, where the direct link transmission period setup message carries duration information of the direct link transmission period and a direct link indication Information, the direct link indication information is used to indicate the scheduled T directly connected links, where T≥1;

a second receiving module, configured to receive a transmission period end indication message sent by the AP, where The transmission period end indication message is used to end the direct link transmission period.
The STA according to claim 26, wherein the direct link in which the STA is located is a direct link in the scheduled T directly connected links;

The STA further includes a sending module, where the sending module is configured to: when the second receiving module receives the transmission period end indication message sent by the AP, when the linear link where the STA is located has no pending data. And transmitting the direct link transmission end indication information to the AP, where the direct link transmission end indication information is used to indicate that the direct link of the STA is completed.
The STA according to claim 27, wherein the direct link transmission end indication information includes identification information of a direct link in which the STA is located.
The STA according to claim 27 or 28, wherein the direct link transmission end indication information is carried in the first message, and the frame type information carried by the first message and the contention free period end CF-End frame The frame type information is the same.
The STA according to claim 27 or 28, wherein the direct link transmission end indication information is carried in a signaling domain of the second message.
The STA according to claim 30, wherein said signaling domain comprises a high efficiency signaling indication field HE-SIG-A or HE-SIG-B, said HE-SIG-A or HE-SIG-B Carrying the direct link transmission end indication information.
The STA according to any one of claims 26 to 31, wherein the transmission period end message is a CF-End frame, and the duration of the transmission period end message is 0.
The transmission method according to any one of claims 26 to 32, wherein the direct link indication information includes identification information of each of the directly connected links of the scheduled T directly connected links Or the group identification information of the scheduled T directly connected links.
The STA according to any one of claims 26 to 33, wherein the direct link transmission end indication information further includes cause information, wherein the direct link transmission end indication information is further used to pass The cause information indicates the reason why the direct link completes the transmission.