WO2017197606A1 - Procédé de transmission, point d'accès et site - Google Patents

Procédé de transmission, point d'accès et site Download PDF

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Publication number
WO2017197606A1
WO2017197606A1 PCT/CN2016/082508 CN2016082508W WO2017197606A1 WO 2017197606 A1 WO2017197606 A1 WO 2017197606A1 CN 2016082508 W CN2016082508 W CN 2016082508W WO 2017197606 A1 WO2017197606 A1 WO 2017197606A1
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WO
WIPO (PCT)
Prior art keywords
direct link
transmission
indication information
message
information
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Application number
PCT/CN2016/082508
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English (en)
Chinese (zh)
Inventor
乔登宇
禄·彼得
丁志明
林英沛
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201680084663.3A priority Critical patent/CN109076633B/zh
Priority to PCT/CN2016/082508 priority patent/WO2017197606A1/fr
Publication of WO2017197606A1 publication Critical patent/WO2017197606A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies

Definitions

  • the present invention relates to the field of communications, and in particular, to a transmission method, an access point, and a station.
  • WiFi Wireless Fidelity
  • IEEE Institute of Electrical and Electronics Engineers
  • UE User Equipment
  • 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).
  • STA station
  • the AP and its associated STAs can form a Basic Service Set (BSS).
  • BSS Basic Service Set
  • Direct Link is an important technology of WiFi, and its purpose is to improve the efficiency of bandwidth usage.
  • STAs 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.
  • 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.
  • 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.
  • the transmission method, the access point and the station provided by the invention can improve the channel usage rate.
  • 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
  • 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.
  • 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.
  • the direct link transmission end indication information includes identifier information of a corresponding direct link.
  • 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.
  • 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.
  • the message carrying the direct link transmission end indication information may multiplex the frame type of the CF-End frame.
  • the direct link transmission end indication information is carried in a signaling domain of the second message.
  • the direct link transmission end indication information may be carried by a message including only the preamble sequence domain and the signaling domain.
  • the signaling domain is 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 period end message is a CF-End frame
  • the duration period of the transmission period end message is 0.
  • the transmission period end message is carried by the CF-End frame to fully use the existing frame resource.
  • 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.
  • 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.
  • the AP may know the reason why the direct link ends the transmission, so as to perform subsequent operations according to the reason.
  • 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.
  • 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.
  • 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.
  • 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.
  • the STA 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.
  • the direct link transmission end indication information includes identifier information of a direct link where the STA is located.
  • 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.
  • the direct link transmission end indication information is carried in a signaling domain of the second message.
  • 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.
  • the transmission period end message is a CF-End frame
  • the duration period of the transmission period end message is 0.
  • 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.
  • 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.
  • the present invention provides an AP, the AP comprising a module for performing the transmission method of the first aspect.
  • the present invention provides a STA, the STA comprising a module for performing the transmission method of the second 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
  • the transceiver is for communicating with a STA.
  • the processor invokes the transceiver to perform the method of the first 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 .
  • the processor invokes the transceiver to perform the method of the second aspect.
  • the present invention provides a communication system comprising the AP of the third aspect, and the STA of the fourth 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.
  • 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.
  • 1 is a schematic diagram of direct link transmission and indirect link transmission according to an embodiment of the present invention.
  • FIG. 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.
  • 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.
  • 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.
  • 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.
  • the indirect link includes an uplink and a downlink.
  • 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.
  • the direct link transmission cycle other sites remain silent, ie no transmission.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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
  • the STA 308 may be the STA 120 or the STA 140 in FIG.
  • the AP 304 sends a direct link transmission period setup message
  • the STA 302 sends a direct link transmission period setup message
  • the STA 306, and the STA 308 receive a direct link transmission period setup message, thereby establishing a direct link transmission period
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • MAC Media Access Control
  • 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).
  • the direct link station 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).
  • NAV Network Allocation Vector
  • the STA 302 and the STA 306 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.
  • the direct link transmission period setup message may be a control frame or a management frame or a data frame.
  • the transmit power of the direct link transmission period setup message may be full power.
  • 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.
  • the transmit power of the direct transmission frame may be link power.
  • 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.
  • the STA 306 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.
  • the transmit power of the acknowledgement frame may be link power.
  • 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.
  • the transmit power of the direct transmission frame is link power.
  • 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.
  • the STA 302 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.
  • the transmit power of the acknowledgement frame may be link power.
  • the above S312 to S318 can be repeatedly executed.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • both the STA 302 and the STA 306 send the direct connection transmission end indication information to the AP 304.
  • 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.
  • 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.
  • the transmit power of the STA 302 and/or the STA 306 that sends the direct transmission end indication information may be full power.
  • the AP 304 may broadcast and send.
  • the transmission period end message the STA receives the transmission period end message.
  • 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.
  • the transmission power of the transmission period end message may be full power.
  • the STA 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.
  • 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.
  • 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 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.
  • FIG. 5 A schematic structure of the enhanced CF-End of the embodiment of the present invention is shown in FIG. 5.
  • the MAC header of the enhanced CF-End 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.
  • 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.
  • the AP may identify that the direct transmission end indication information belongs to the BSS according to the BSSID field.
  • the AP may identify the direct link of the direct connection end indication information.
  • 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.
  • 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.
  • the duration of the enhanced CF-End frame may be the remaining time of the direct transmission period.
  • 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.
  • NDP null data packet
  • 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.
  • BSS Color basic service set color
  • the new signaling domain may also include an end cause field of the direct link.
  • 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).
  • HE-SIG-A High Efficiency Signaling Indicator Domain A
  • HE-SIG-B High Efficiency Signaling Indicator Domain B
  • 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.
  • the AP may identify the direct link of the direct connection end indication information according to the direct link identifier.
  • the AP may identify the reason for the end of the direct connection transmission according to the end cause field.
  • 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.
  • the STA 306 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.
  • the direct link transmission end indication information includes identifier information of the corresponding direct link.
  • 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.
  • 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.
  • 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.
  • the transmission period end message is a CF-End frame, and the duration of the transmission period end message is 0.
  • the direct link indication information includes identifier information or a location of each directly connected link in the scheduled T directly connected links.
  • 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 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.
  • 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.
  • the direct link transmission end indication information includes identifier information of a direct link where the STA is located.
  • 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.
  • 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.
  • 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.
  • the transmission period end message is a CF-End frame, and the duration of the transmission period end message is 0.
  • 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.
  • 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. 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.
  • 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.
  • the direct link transmission end indication information includes identifier information of the corresponding direct link.
  • 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.
  • 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.
  • 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.
  • the transmission period end message is a CF-End frame, and the duration of the transmission period end message is 0.
  • the direct link indication information includes identifier information or a location of each directly connected link in the scheduled T directly connected links.
  • 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. 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.
  • 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.
  • 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.
  • the direct link transmission end indication information includes identifier information of a direct link where the STA is located.
  • 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.
  • 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.
  • 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.
  • the transmission period end message is a CF-End frame, and the duration of the transmission period end message is 0.
  • 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.
  • 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.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative
  • 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.
  • 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.
  • 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.
  • 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. .

Abstract

L'invention concerne un procédé de transmission, un point d'accès et un site. Le procédé de transmission comprend les opérations suivantes : le point d'accès (AP) transmet un message d'établissement de période de transmission de liaison directe, le message d'établissement de période de transmission de liaison directe transportant des informations de durée de période de transmission de liaison directe et des informations d'indicateur de liaison directe, les informations d'indicateur de liaison directe étant utilisées pour indiquer T liaisons directes planifiées, où T ≥ 1; et avant que le temps désigné dans les informations de durée ne se termine et lorsque l'AP reçoit des informations d'indication de fin de transmission de liaison directe transmises à partir de tous les sites de liaison directe dans les T liaisons directes planifiées, l'AP transmet un message d'indication de fin de période de transmission, les informations d'indication de fin de transmission de liaison directe étant utilisées pour indiquer que la liaison directe correspondante a achevé la transmission et le message d'indication de fin de période de transmission étant utilisé pour mettre fin à la période de transmission de liaison directe. Le procédé de transmission, le point d'accès et la station de l'invention peuvent améliorer l'utilisation de canal.
PCT/CN2016/082508 2016-05-18 2016-05-18 Procédé de transmission, point d'accès et site WO2017197606A1 (fr)

Priority Applications (2)

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CN201680084663.3A CN109076633B (zh) 2016-05-18 2016-05-18 传输方法、接入点和站点
PCT/CN2016/082508 WO2017197606A1 (fr) 2016-05-18 2016-05-18 Procédé de transmission, point d'accès et site

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102098796A (zh) * 2009-12-15 2011-06-15 英特尔公司 自主对等体发现和增强链路可靠性的方法、系统和设备
US20120051240A1 (en) * 2010-07-29 2012-03-01 Qualcomm Incorporated Systems and methods of communication using tunneled direct link setup (tdls)
CN103222311A (zh) * 2010-11-16 2013-07-24 交互数字专利控股公司 用于无线直接链路操作的方法和设备
WO2015142132A1 (fr) * 2014-03-21 2015-09-24 Lg Electronics Inc. Procédé et appareil d'indication d'informations d2d dans un système de communication sans fil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102098796A (zh) * 2009-12-15 2011-06-15 英特尔公司 自主对等体发现和增强链路可靠性的方法、系统和设备
US20120051240A1 (en) * 2010-07-29 2012-03-01 Qualcomm Incorporated Systems and methods of communication using tunneled direct link setup (tdls)
CN103222311A (zh) * 2010-11-16 2013-07-24 交互数字专利控股公司 用于无线直接链路操作的方法和设备
WO2015142132A1 (fr) * 2014-03-21 2015-09-24 Lg Electronics Inc. Procédé et appareil d'indication d'informations d2d dans un système de communication sans fil

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CN109076633A (zh) 2018-12-21

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