WO2015074199A1 - Procédé et appareil d'établissement d'une liaison directe dans un réseau local sans fil - Google Patents

Procédé et appareil d'établissement d'une liaison directe dans un réseau local sans fil Download PDF

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Publication number
WO2015074199A1
WO2015074199A1 PCT/CN2013/087525 CN2013087525W WO2015074199A1 WO 2015074199 A1 WO2015074199 A1 WO 2015074199A1 CN 2013087525 W CN2013087525 W CN 2013087525W WO 2015074199 A1 WO2015074199 A1 WO 2015074199A1
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WIPO (PCT)
Prior art keywords
direct link
site
station
group
direct
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Application number
PCT/CN2013/087525
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English (en)
Chinese (zh)
Inventor
林英沛
张佳胤
罗毅
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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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380077332.3A priority Critical patent/CN105284175B/zh
Priority to PCT/CN2013/087525 priority patent/WO2015074199A1/fr
Publication of WO2015074199A1 publication Critical patent/WO2015074199A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • Embodiments of the present invention relate to the field of communications, and more particularly, to a method and apparatus for establishing a direct link in a wireless local area network. Background technique
  • WLAN Wireless Local Area Network
  • WiFi Wireless Fidelity
  • the existing direct link communication technologies are based on Carrier Sense Multiple Access with Collision Avoid (CSMA/CA), and do not consider the characteristics of the scheduling-based WLAN system. Therefore it may not be applicable to scheduling-based WLAN systems.
  • CSMA/CA Carrier Sense Multiple Access with Collision Avoid
  • TDLS Tunnel Link Direct Link Setup
  • each direct link is independent of each other, communication between two sites in the direct link needs to compete for transmission resources, and the transmission resources can only be occupied by the successful direct link, so that the spectrum resources The utilization rate is low.
  • the present invention provides a method and apparatus for establishing a direct link, which is mainly applied to a scheduling-based WLAN system, which can improve spectrum resource utilization and improve user experience. Summary of the invention
  • the embodiments of the present invention provide a method, an access point, and a site for establishing a direct link in a WLAN, which can reduce the overhead of scheduling signaling and improve the utilization of spectrum resources.
  • the first aspect provides a method for establishing a direct link in a WLAN, including: receiving a first direct link setup request message sent by a first station, where the first direct link setup request message is used for requesting and second The station establishes a direct link; when it is determined that the second station can establish a direct link with the first station, determining a direct link group to which the direct link between the first station and the second station belongs; a first link and the second station send a direct link setup confirmation message, where the direct link setup acknowledgement message includes the identifier information of the direct link group, so that the first site and the second site are configured according to the direct link group.
  • the identification information is for direct link communication.
  • interference between any two direct links in the direct link group is lower than a preset interference value.
  • determining the first The direct link group to which the direct link between the site and the second site belongs includes: when the first site and the basic service set BSS to which the second site belongs, support direct link communication and the second site has a direct link In the case of the road communication capability, the direct link group to which the direct link between the first station and the second station belongs is determined.
  • the method further includes: sending, to the second station, a second direct link setup request message, where the second direct link setup request message is used to request the second site to establish with the first site Direct link; determining the direct link group to which the direct link between the first station and the second station belongs, comprising: receiving a direct link sent by the second station according to the second direct link setup request message When the path setup response message is determined, the direct link group to which the direct link between the first site and the second site belongs is determined, where the direct link setup response message is used to indicate that the second site agrees with the first The site establishes a direct link.
  • the determining the first site and the first The direct link group to which the direct link between the two sites belongs includes: determining, according to link state information of the first site and the second site, a direct link between the first site and the second site Direct link group of the genus.
  • the determining the first site and the first The direct link group to which the direct link between the two sites belongs includes: determining a direct link between the first site and the second site according to location information of the first site and location information of the second site The direct link group to which it belongs.
  • the determining the first site and the first The direct link group to which the direct link between the two sites belongs includes: determining, according to the information of the third site and the information of the fourth site, the direct link to which the direct link between the first site and the second site belongs The road group, the first station can listen to the third station, and the second station can listen to the fourth station.
  • the method further includes: determining the first Transmit power for direct link communication between the station and the second station; transmitting transmit power indication information to the first station and the second station, the transmit power indication information being used to indicate the transmit power.
  • the method further includes: The path group allocates the transmission resource; and sends resource scheduling indication information to all the stations of the direct link group, where the resource scheduling indication information is used to indicate the transmission resource allocated by the AP to the direct link group.
  • the method before the allocating the transmission resource for the direct link group, the method further includes: receiving the first site or the second a transmission resource request sent by the station, the transmission resource request is used to request the wireless access point AP to allocate a transmission resource for the direct link between the first station and the second station; the transmission resource is allocated to the direct link group, The method includes: allocating transmission resources to the direct link group according to the transmission resource request.
  • a second aspect provides a method for establishing a direct link in a WLAN, where: the first station sends a first direct link setup request message to the wireless access point AP, where the first direct link setup request message is used. And establishing a direct link with the second station; receiving a first direct link setup acknowledgement message sent by the AP according to the first direct link setup request message, where the first direct link is established.
  • the confirmation message includes identification information of a direct link group to which the direct link between the first station and the second station belongs.
  • interference between any two direct links in the direct link group is lower than a preset interference value.
  • the first direct link setup request message includes at least one of the following information: the first site Location information, link state information of the first site and the second site, and information of the third site, the first site being able to listen to the third site.
  • the method further includes: receiving, by the AP, transmit power indication information, the transmit power The indication information is used to indicate the transmit power of the direct link communication between the first station and the second station; and the direct link communication is performed between the second station and the second station.
  • the method further includes: receiving the AP sending The resource scheduling indication information is used to indicate the transmission resource allocated by the AP to the direct link group; and data transmission is performed between the second resource and the second station.
  • the method before the receiving the resource scheduling indication information sent by the AP, the method further includes: sending a transmission resource request to the AP, where The transmission resource request is used to request the AP to allocate transmission resources for the direct link between the first station and the second station.
  • the receiving the resource scheduling indication information sent by the AP includes: receiving the AP to send according to the transmission resource request Resource scheduling indication information.
  • the method further includes: receiving the AP sending a third direct link setup request message, the third direct link setup request message is used to request the first station to establish a direct link with the fifth station, and send the message to the AP according to the third direct link setup request message.
  • a second direct link setup response message the second direct link setup response message is used to indicate that the first station agrees to establish a direct link with the fifth station; and the receiving the AP is sent according to the second direct link setup response message.
  • the direct link setup confirmation message includes the identifier information of the direct link group to which the direct link between the fifth station and the first station belongs.
  • the second direct link setup response message includes at least one of the following information: location information of the first site, The link state information of the fifth site and the first site and the information of the third site.
  • the third aspect provides an access point AP, including: a receiving module, configured to receive a first direct link setup request message sent by the first station, where the first direct link setup request message is used for requesting and second Establishing a direct link by the station; the determining module, the second station for determining the first direct link setup request message received by the receiving module is capable of establishing a direct link with the first station, and determining the first site and a direct link group to which the direct link between the second sites belongs; a sending module, configured to send a direct link setup acknowledgement message to the first station and the second station, where the direct link setup acknowledgement message includes the determining The module determines the identification information of the direct link group, so that the first station and the second station perform direct link communication according to the identification information of the direct link group.
  • interference between any two direct links in the direct link group is lower than a preset interference value.
  • the determining module is specifically configured to: when the first site and the second site belong to a basic service set When the BSS supports direct link communication and the second station has direct link communication capability, the direct link group to which the direct link between the first station and the second station belongs is determined.
  • the sending module is further configured to determine, at the determining module, the first site and the first Before the direct link group to which the direct link between the two sites belongs, sending a second direct link setup request message to the second site, where the second direct link setup request message is used to request the second site and the first a first link establishes a direct link;
  • the receiving module is further configured to receive a direct link setup response message sent by the second station according to the second direct link setup request message sent by the sending module, where the direct link setup response message is used Instructing the second site to agree to establish a direct link with the first site;
  • the determining module is specifically configured to determine, according to the direct link setup response message received by the receiving module, between the first site and the second site The direct link group to which the direct link belongs.
  • the determining module is specifically configured to: The link state information of the first site and the second site determines a direct link group to which the direct link between the first site and the second site belongs.
  • the determining module is specifically configured to: determine, according to location information of the first site and location information of the second site, the first site and the first The direct link group to which the direct link between the two sites belongs.
  • the determining module is specifically configured to: The information of the three sites and the information of the fourth site determine a direct link group to which the direct link between the first site and the second site belongs, and the first site can detect the third site, the second The site is able to listen to the fourth site.
  • the determining module is further configured to determine the first Transmit power for direct link communication between a station and the second station; the sending module is further configured to send transmit power indication information to the first station and the second station, where the transmit power indication information is used to indicate the determining The transmit power determined by the module.
  • the AP further includes: an allocation module, And allocating the transmission resource to the direct link group; the sending module is further configured to send the resource scheduling indication information to all the stations of the direct link group, where the resource scheduling indication information is used to indicate that the allocation module allocates the direct link group The transmission resource.
  • the receiving module is further configured to receive the first site or before the allocating module allocates transmission resources for the direct link group a transmission resource request sent by the second station, where the transmission resource request is used to request the wireless access point AP to allocate transmission resources for a direct link between the first station and the second station; The transmission resource request received by the receiving module allocates transmission resources for the direct link group.
  • a fourth aspect provides a station, including: a sending module, configured to send a first direct link setup request message to a wireless access point AP, where the first direct link setup request message is used to request to establish with a second site a direct link; a receiving module, configured to receive a first direct link setup acknowledgement message sent by the AP according to the first direct link setup request message sent by the sending module, where the first direct link setup acknowledgement message includes the first Identification information of a direct link group to which a direct link between a site and the second site belongs.
  • any two of the direct link groups The interference between the direct links is lower than the preset interference value.
  • the first direct link setup request message sent by the sending module includes at least one of the following information. : location information of the first site, link state information of the first site and the second site, and information of the third site, the first site being able to detect the third site.
  • the receiving module is further configured to receive, by the AP, transmit power indication information, where the The power indication information is used to indicate the transmit power of the direct link communication between the first station and the second station;
  • the site further includes: a direct link communication module, configured to receive the transmit power indication information by the receiving module The indicated transmit power is in direct link communication with the second station.
  • the receiving module is further configured to receive the AP a resource scheduling indication information, where the resource scheduling indication information is used to indicate the transmission resource allocated by the AP to the direct link group;
  • the site further includes: a data transmission module, configured to receive the resource scheduling indication at the receiving module Data transmission between the transmission resource indicated by the information and the second station.
  • the sending module is further configured to: before the receiving module receives the resource scheduling indication information sent by the AP, send the transmission resource to the AP a request, the transmission resource request is used to request the AP to allocate a transmission resource for a direct link between the first station and the second station; the receiving module is specifically configured to receive the transmission resource request sent by the AP according to the sending module The resource scheduling indication information sent.
  • the receiving module is further configured to receive the AP And a third direct link setup request message, where the third direct link setup request message is used to request the first station to establish a direct link with the fifth station;
  • the sending module is further configured to receive, according to the receiving module, the first link a third direct link setup request message, where the second direct link setup response message is sent to the AP, the second direct link setup response message is used to indicate that the first station agrees to establish a direct link with the fifth station;
  • the module is further configured to receive a direct link setup acknowledgement message sent by the AP according to the second direct link setup response message sent by the sending module, where the second direct link setup acknowledgement message includes the fifth site and the first site Direct link between direct links ID information of the link group.
  • the second direct link setup response message sent by the sending module includes at least one of the following information: the first site Location information, link state information of the fifth site and the first site, and information of the third site.
  • a method, an access point, and a station for establishing a direct link in a WLAN are mainly applied to a scheduling-based WLAN system, and the direct link is determined by an AP in establishing a direct link.
  • the direct link packet described in the path enables the AP to uniformly manage and schedule the direct link in the direct link packet, thereby reducing scheduling signaling overhead, improving spectrum resource utilization, and improving network throughput, and Improve the user experience.
  • FIG. 1 is a schematic flow chart of a method for establishing a direct link in a WLAN according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a direct link packet according to an embodiment of the present invention.
  • FIG. 3 is another schematic flowchart of a method for establishing a direct link in a WLAN according to an embodiment of the present invention.
  • FIG. 4 is still another schematic flowchart of a method for establishing a direct link in a WLAN according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of configuring resources for a direct link group according to an embodiment of the present invention.
  • FIG. 6 is another schematic diagram of configuring resources for a direct link group according to an embodiment of the present invention.
  • FIG. 7 is still another schematic diagram of configuring resources for a direct link group according to an embodiment of the present invention.
  • FIG. 8 is still another schematic diagram of configuring resources for a direct link group according to an embodiment of the present invention.
  • FIG. 9 is still another schematic flowchart of a method for establishing a direct link in a WLAN according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of a method for establishing a direct link in a WLAN according to another embodiment of the present invention.
  • FIG. 11 is another schematic flowchart of a method for establishing a direct link in a WLAN according to another embodiment of the present invention.
  • FIG. 12 is still another schematic flowchart of a method of establishing a direct link in a WLAN according to another embodiment of the present invention.
  • FIG. 13 is a schematic flowchart of a method for establishing a direct link in a WLAN according to still another embodiment of the present invention.
  • FIG. 14 is a schematic flowchart of a method for scheduling a direct link according to an embodiment of the present invention.
  • Figure 15 is a schematic block diagram of an access point in accordance with an embodiment of the present invention.
  • FIG. 16 is another schematic block diagram of an access point according to an embodiment of the present invention.
  • Figure 17 is a schematic block diagram of a station in accordance with an embodiment of the present invention.
  • FIG. 18 is a schematic block diagram of an access point according to another embodiment of the present invention.
  • FIG 19 is a schematic block diagram of a station in accordance with another embodiment of the present invention. detailed description
  • WLAN networks which may be WiFi networks, or may be WiMAX (Worldwide Interoperability for Microwave Access) or WAPI (WLAN Authentication).
  • WiMAX Worldwide Interoperability for Microwave Access
  • WAPI Wi-Fi Authentication
  • the privacy infrastructure which is called a "wireless local area network authentication and security infrastructure" network, etc., is not limited in this embodiment of the present invention.
  • the station can be connected to the Internet through (Access Point, called “AP").
  • the site may be a device with signal acquisition, data processing, wireless communication, etc. in the WLAN network sensor application service, or a device that communicates with the access point in other application services other than the sensor application service of the WLAN network.
  • the station may be a fixed terminal or a mobile terminal such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
  • the AP can be a separate AP, and the AP is accessed by an access controller (Access Controller).
  • Access Controller Access Controller
  • control and management of "AC” can also be an AP that includes AC functions, or it can be combined with a base station.
  • the specific embodiment of the present invention is not limited thereto.
  • the method and apparatus for establishing a direct link in a WLAN provided by the embodiments of the present invention are mainly applied to a scheduling-based WLAN system, including a completely scheduling-based WLAN system and a WLAN system based on scheduling and contention.
  • the present invention is not limited to the WLAN system based on the competition.
  • FIG. 1 is a schematic flowchart of a method 100 for establishing a direct link in a WLAN according to an embodiment of the present invention.
  • the method 100 may be performed by any suitable device, for example, by an AP, as shown in FIG.
  • Method 100 includes:
  • S110 Receive a first direct link setup request message sent by the first station, where the first direct link setup request message is used to request to establish a direct link with the second site.
  • the first direct link setup request message sent by the first station may include identifier information of the second site, for example, media access control (Medium Access Control, called "MAC" of the second site.
  • the address and the like may further include at least one of the following information: identification information of the first site, location information of the first site, information of the third site, and the first site and the second site Link state information, the first site is capable of detecting the third site, where the location information of the first site may be an absolute location of the first site, or may be a relative location of the first site relative to the AP
  • the first station is capable of receiving the signal sent by the third station, the information of the third station may include the identifier information and/or the location information of the third station, and may further include the first node to the third node.
  • the measurement result of the measurement is performed by the signal sent by the node, and the measurement result may include information such as the signal strength, and the embodiment of the present invention is not limited thereto;
  • the signal transmitted by the second station is measured to obtain the link state information, where the link state information may include the signal strength of the signal sent by the second station received by the first station, and may also include the first station according to the signal strength. Determining the transmit power of the direct link communication between the first site and the second site, but the embodiment of the present invention is not limited thereto.
  • the first direct link setup request message may further include other information. This embodiment of the present invention does not limit this.
  • the AP determines that the second station can establish a direct link with the first station, and determines a direct link group to which the direct link between the first station and the second station belongs. Specifically, when the direct link between the first site and the second site can be in the same group as the existing direct link, the AP can directly link the first site to the second site. The route is in the direct link group to which the existing direct link belongs; and when the direct link between the first site and the second site cannot be in the same group as any existing direct link, The AP may establish a new direct link group for the direct link between the first site and the second site, but the embodiment of the present invention is not limited thereto.
  • the AP sends the identifier information of the direct link group to the first site and the second site, where the identifier information of the direct link group may be a group identifier of the direct link group, but the implementation of the present invention is implemented.
  • the AP can perform unified management and scheduling on the direct link group. For example, the AP can allocate transmission resources in units of direct link groups. Accordingly, the first station and the second station receive the direct link group. After the identification information, the AP may request the transmission resource by using the identifier information of the direct link group, or may determine the transmission resource allocated by the AP to the direct link group according to the identifier information of the direct link group, but the present invention The embodiment is not limited to this.
  • the method for establishing a direct link in a WLAN is mainly applied to a scheduling-based WLAN system, and the direct link group described by the direct link is determined by the AP in establishing a direct link.
  • the AP can perform unified management and scheduling on the direct link in the direct link packet, thereby reducing scheduling signaling overhead, improving spectrum resource utilization, improving network throughput, and improving user experience.
  • the AP may determine whether the basic service set (Basic Service Set, called "BSS") belongs to the first site and the second site.
  • BSS Basic Service Set
  • the ability to support direct link communication and/or whether the second site has direct link communication determines whether the second site is capable of establishing direct link communication with the first site.
  • S120 when determining that the second station can establish a direct link with the first station, determining a direct link group to which the direct link between the first station and the second station belongs, including:
  • the AP may first determine whether the BSS to which the first station and the second station belong to support direct link communication, and when the BSS does not support direct link communication, the AP may The station sends a direct link setup reject message; otherwise, the AP can further determine whether the second site has the capability to support direct link communication, and when the second site does not have the capability to support direct link communication, the AP determines The second station cannot establish a direct link with the first station, and can send a direct link setup reject message to the first station; otherwise, the AP can determine that the second site can establish a direct link with the first site.
  • the road but the embodiment of the invention is not limited thereto.
  • the AP may also determine the second when the first site is requested to establish a direct link with the first site by receiving the first direct link setup request message. Whether the site can establish a direct link with the first site.
  • the method 100 further includes:
  • S140 Send a second direct link setup request message to the second station, where the second direct link setup request message is used to request the second station to establish a direct link with the first site.
  • S120 determining a direct link group to which the direct link between the first site and the second site belongs, includes:
  • the AP sends a second direct link setup request message to the second station to query whether the second site agrees to establish a direct link with the first station, where the second direct link setup request message
  • the information of the first node may be carried, for example, the identifier information of the first node, the location information of the first node, the service information of the first node, or the capability information of the first node, so that the second node determines Whether or not to agree to establish a direct link with the first node, the embodiment of the present invention is not limited thereto.
  • the direct link setup response message is used to indicate that the second station agrees to establish a direct link with the first station, may include only one bit of the indication bit, and may further include the AP may be used to determine the
  • the direct link setup response message may include at least one of the following information: the second node The location information, the information of the fourth node, and the link state information of the first site and the second site, the second node is capable of detecting the fourth node, where the location information of the second node may be the first
  • the absolute position of the second node may also be the relative position of the second node relative to the AP; the second node is capable of receiving the signal sent by the fourth node, the fourth section
  • the information of the point may include the location information and/or the identifier information of the fourth node, and may further include a measurement result that the second node measures the signal sent by the fourth node, and the measurement result may include a signal strength, and the like.
  • the second station may measure the signal transmitted by the first station to obtain the link state information, and the link
  • the status information may include a signal strength of the signal transmitted by the first station received by the second station, and may also include a direct link between the first station and the second station determined by the second station according to the signal strength.
  • the transmission power of the communication but the embodiment of the present invention is not limited thereto.
  • the direct link setup response message may further include other information, and the embodiment of the present invention is not limited thereto.
  • the AP may further determine the second site by querying the second site. Whether a direct link can be established with the first station, but the embodiment of the present invention is not limited thereto.
  • the AP may group the direct links based on multiple parameters, and optionally, the AP may group the direct links according to interference situations between the direct links, for example, The interference between all direct links in the same direct link group is lower than a preset threshold, so that multiple direct links in the same direct link group can use the same transmission resource for data transmission and mutual The AP does not interfere with each other.
  • the AP may also group the direct link according to other parameters, which is not limited in this embodiment of the present invention.
  • the interference between any two direct links in the direct link group is lower than a preset interference value.
  • the preset interference value may be determined according to interference that the station can bear, and the interference between any two direct links in the direct link group may be zero, or is greater than or equal to zero and less than the preset interference value. Any numerical value, but the embodiment of the invention is not limited thereto.
  • the following describes an example in which the AP groups the direct links according to the interference between the direct links, but the embodiment of the present invention is not limited thereto.
  • the direct link group in the S120 or S120a or S120b that determines the direct link between the first site and the second site belongs to:
  • S121 Determine, according to location information of the first site and location information of the second site, a direct link group to which the direct link between the first site and the second site belongs.
  • the AP may directly link the distance between the first station and the second station.
  • the direct links of the first site and the site farther away from the second site are in the same group, so that the direct link between the first site and the second site and other direct links in the direct link group The probability of the channel generating interference is low.
  • a direct link between STA1 and STA12 in one BSS of the AP is established, a direct link between STA1 and STA2, and STA9 farther away from it.
  • the AP may obtain location information of the first site and location information of the second site in multiple manners.
  • the AP may obtain location information of the first site from the first direct link setup request message.
  • the AP may directly obtain the location information of the first site from the first direct link setup request message; when the first direct link setup request message includes the identifier information of the first site, the AP also The location information of the first site may be determined according to the identifier information of the first site, but the embodiment of the present invention is not limited thereto.
  • the AP may obtain the location information of the second site from the first direct link setup request message or the direct link setup response message. Specifically, the AP may directly obtain the direct link response message from the direct link response message.
  • the location information of the second site is determined, or the location information of the second site is determined according to the identifier information of the second site that is carried by the first direct link setup request message, which is not limited by the embodiment of the present invention.
  • determining, by the S120 or S120a or S120b, a direct link group to which the direct link between the first site and the second site belongs includes:
  • S122 Determine, according to the link state information of the first site and the second site, a direct link group to which the direct link between the first site and the second site belongs.
  • the AP may obtain the link state information from the first direct link request message or the direct link setup response message; when the link state information includes a signal strength, the AP may determine the first site according to the signal strength The transmit power of the direct link communication with the second station, or the AP directly obtains the transmit power information included in the link state information; and then the AP may determine the first site and the second site according to the transmit power
  • the interference range of the direct link between the direct links is determined so that the stations of other direct links in the direct link group are outside the interference range, but the embodiment of the present invention is not limited thereto.
  • determining the first in the S120 or S120a or S120b The direct link group to which the direct link between the site and the second site belongs includes:
  • S123 Determine, according to the information of the third site and the information of the fourth site, a direct link group to which the direct link between the first site and the second site belongs, where the first site can detect the third site
  • the second site is capable of listening to the fourth site.
  • the AP may obtain information about the third site and the fourth site from the first site and the second site, respectively, optionally, the first direct link setup request message includes information of the third site, where the direct The link setup response message includes information of the fourth site.
  • the AP may obtain the information of the third site and the information of the fourth site from the first direct link setup request message and the direct link setup response message, respectively, but the embodiment of the present invention is not limited thereto.
  • the AP may divide the direct link between the first site and the second site into a direct link group that does not include the third site and does not include the fourth site; the AP may also be configured according to the The location information of the third site and the location information of the fourth site, and the direct link between the first site and the second site is not included in the site that is closer to the third site and the fourth site.
  • the AP may also be based on the signal strength of the signal sent by the third station received by the first station, and the second station Receiving the signal strength of the signal sent by the fourth station, determining the interference station in the third station and the fourth station that the signal strength exceeds a certain threshold, and directing the direct link between the first station and the second station
  • the route is in a direct link group that does not include the interference site and does not include a site near the interference site to reduce the direct link between the first site and the second site and other direct directs in the direct link group Link
  • the probability of interference between, but the embodiment of the invention is not limited thereto.
  • the method 100 further includes:
  • S160 Send transmit power indication information to the first station and the second station, where the transmit power indication information is used to indicate the transmit power.
  • the AP may obtain the transmit power from the first direct link setup request message or the direct link setup response message, or may be related information according to the first direct link setup request message and the direct link setup response message. , determine the transmit power.
  • the first station and the second station may perform data transmission by using the transmit power, but the embodiment of the present invention is not limited thereto.
  • the AP may also control, according to the real-time status of the direct link between the first site and the second site, the transmit power of the direct link communication between the first site and the second site. And adjustment, However, embodiments of the invention are not limited thereto.
  • the method 100 further includes:
  • the AP may actively allocate transmission resources to the direct link group, or may allocate transmission resources to the direct link group according to the received transmission resource request sent by the station included in the direct link group, and the present invention
  • the embodiment does not limit this.
  • the AP may be based on the service type of the direct link in the direct link group and the quality of service of the site included in the direct link group (Quality of Service, called "" The QoS") or the transmission resource requested by the station determines the transmission resource allocated to the direct link group, and the embodiment of the present invention is not limited thereto.
  • the AP may broadcast the resource scheduling indication information, and include the group identifier of the direct link group in the resource scheduling indication information, so that the station included in the direct link group may determine the transmission according to the group identifier.
  • Resources are allocated for this direct link group and are directly linked over the specified transport resources.
  • the AP may send the resource scheduling indication information in the dedicated control channel, or may send the resource scheduling indication information in the data channel of the BSS, but the embodiment of the present invention is not limited thereto.
  • FIG. 5 is a diagram showing an example of resource allocation indicated by resource scheduling indication information according to an embodiment of the present invention.
  • the transmission resource and the location indicating the transmission resource are separately configured.
  • the AP may schedule a direct link group with an ID of 1 on the first uplink (Uplink, called Data transmission is performed within a certain transmission resource within "UL"), and the direct link group with the scheduling ID of 2 performs data transmission on a certain transmission resource in the second uplink period.
  • the AP may also schedule the normal link to perform data transmission on the same transmission resource while scheduling the direct link group, where the communication between the normal link and the direct link group does not interfere with each other. ;
  • the AP may also schedule the direct link group to perform data transmission on a certain transmission resource in the downlink (Downlink, referred to as "DL"), but the embodiment of the present invention is not limited thereto.
  • the embodiment of the present invention may also be applied to a WLAN system based on scheduling and contention.
  • the AP is first in a contention window. It is called “CW”. It competes with other APs for resources.
  • the AP competes for resources, it first sends channel clearing signaling (Channel Clear Signaling, called "CCS") to ensure that the AP is in the next segment.
  • CCS Channel Clear Signaling
  • the AP can perform uplink or downlink scheduling on the normal link, so that the normal link occupies the uplink scheduling window shown in FIG. 7 (the scheduling window)
  • the trunk is called "SW") or the transmission resource corresponding to the downlink scheduling SW.
  • the direct link can also be scheduled to occupy uplink or downlink transmission resources, so that when there is no full-time scheduling of uplink or downlink resources.
  • the AP can schedule the direct link group to significantly improve network efficiency.
  • the AP is a normal link, and the direct link group may be separately scheduled, but the embodiment of the present invention is not limited thereto.
  • the AP may also allocate transmission resources to the direct link group by means of polling.
  • polling frame Contention Free-Poll, called "CF-Poll”
  • NAV Network Allocation Vector
  • the station schedules and transmits data during the time period of the maximum transmission opportunity (Transmission Opportunity), and during this time period, the ⁇ can be based on the QoS requirements of the sites included in each direct link group.
  • the service type and other factors allocate transmission resources for each direct link group, and in the polling frame, the identifier of the direct link group indicates that the next resource is allocated to the direct link group, and the station determines the direct link group to which it belongs. Whether it corresponds to the identifier of the direct link group indicated in the polling frame, and if so, direct link communication is performed in the transmission resource, but the embodiment of the present invention does not Here.
  • the AP may allocate transmission resources to the direct link group according to the transmission resource request sent by the station included in the direct link group.
  • the method 100 further includes:
  • S190 Receive a transmission resource request sent by the first station or the second station, where the transmission resource request is used to request the wireless access point AP to allocate transmission resources for a direct link between the first station and the second station.
  • S170 allocating transmission resources for the direct link group, including:
  • the transmission resource request may include a service type and/or a QoS requirement of the first site and the second site, so that the AP allocates transmission resources for the direct link group, but the embodiment of the present invention is not limited thereto.
  • the AP may further send the direct link teardown indication information to the first site and the second site, where the first site and the second site remove the direct link according to the indication information. road.
  • the AP may remove the direct link between the first site and the second site actively or according to the request of the first site or the second site, specifically, when the AP discovers the party of the direct link communication (ie, When the first station or the second station leaves the BSS or is associated with the AP, or the AP sets a maximum communication duration for the direct link, and the communication time of the direct link reaches the maximum communication duration
  • the AP may initiate the teardown of the direct link.
  • the first site or the second site when the first site or the second site does not want to receive the direct link data again, or the party of the direct link communication is a printer, When the projector, storage device, etc., and the other party ends the transmission to these devices, the first site or the second site initiates the removal of the direct link.
  • the AP may further receive a direct link teardown request sent by the first station or the second station, requesting the The AP removes the direct link, but the embodiment of the present invention is not limited thereto.
  • the method for establishing a direct link in a WLAN is mainly applied to a scheduling-based WLAN system, and the direct link group described by the direct link is determined by the AP in establishing a direct link.
  • the AP can perform unified management and scheduling on the direct link in the direct link packet, thereby reducing scheduling signaling overhead, improving spectrum resource utilization, improving network throughput, and improving user experience.
  • a method for establishing a direct link in a WLAN is described in detail from the perspective of an AP.
  • a WLAN in accordance with an embodiment of the present invention will be described in detail from the perspective of a station in conjunction with FIG. 10 to FIG. A method of establishing a direct link.
  • FIG. 10 is a schematic flowchart of a method 200 for establishing a direct link in a WLAN according to another embodiment of the present invention. As shown in FIG. 10, the method 200 includes:
  • the first station sends a first direct link setup request message to the wireless access point AP, where the first direct link setup request message is used to request to establish a direct link with the second site.
  • the S220 Receive a first direct link sent by the AP according to the first direct link setup request message.
  • the path establishment confirmation message includes the identifier information of the direct link group to which the direct link between the first station and the second station belongs.
  • the method for establishing a direct link in a WLAN is mainly applied to a scheduling-based WLAN system, and the direct link group described by the direct link is determined by the AP in establishing a direct link.
  • the AP can perform unified management and scheduling on the direct link in the direct link packet, thereby reducing scheduling signaling overhead, improving spectrum resource utilization, improving network throughput, and improving user experience.
  • the interference between any two direct links in the direct link group is lower than a preset interference value.
  • the first direct link setup request message may include the identifier information of the second site, for example, the MAC address of the second site, and the like, and may further include an AP that can be used by the AP to determine the first site and The information of the direct link group to which the direct link between the second sites belongs, but the embodiment of the present invention is not limited thereto.
  • the first direct link setup request message includes at least one of the following information: location information of the first site, link state information of the first site and the second site. And the information of the third site, the first site can listen to the third site.
  • the location information of the first site may be an absolute location of the first site, or may be a relative location of the first site relative to the AP; the first site is capable of receiving a signal sent by the third site, where
  • the information of the third site may include the identifier information and/or the location information of the third site, and may further include a measurement result that the first node measures the signal sent by the third node, and the measurement result may include a signal strength, etc.
  • the information is not limited thereto.
  • the first station may obtain the link state information by measuring the signal transmitted by the second station, where the link state information may include the second received by the first station.
  • the signal strength of the signal sent by the station may also include the transmit power of the direct link communication between the first station and the second station determined by the first station according to the signal strength, but the embodiment of the present invention is not limited thereto.
  • the AP may perform direct link communication between the first site and the second site according to a real-time status of a direct link between the first site and the second site.
  • the transmit power is controlled and adjusted. Accordingly, the method 200 further includes:
  • the method 200 further includes:
  • S250 Receive resource scheduling indication information sent by the AP, where the resource scheduling indication information is used to indicate the transmission resource allocated by the AP to the direct link group.
  • the transmission resource indicated by the resource scheduling indication information may be a transmission resource that the AP actively allocates for the direct link group, or may be a transmission resource request sent by the AP according to the received station included in the direct link group.
  • the transmission resource allocated for the direct link group is not limited in this embodiment of the present invention.
  • the method 200 further includes:
  • the S250 the receiving the resource scheduling indication information sent by the AP, includes:
  • the transmission resource request may include information such as the service type of the first site and the second site, so that the AP allocates transmission resources to the direct link group according to the transmission resource request; optionally, the second site
  • the transmission resource request may also be sent to the AP, but the embodiment of the present invention is not limited thereto.
  • another station associated with the AP may also request to establish a direct link with the first station. Accordingly, as shown in FIG. 12, the method 200 further includes:
  • S280 Receive a third direct link setup request message sent by the AP, where the third direct link setup request message is used to request that the first station establish a direct link with the fifth station.
  • S290 Send a second direct link setup response message to the AP according to the third direct link setup request message, where the second direct link setup response message is used to indicate that the first site agrees to establish a direct connection with the fifth site.
  • the fifth station requests to establish a direct link with the first station, and the AP sends the third direct link setup request message to the first station, where the third direct link request message may carry the fifth station Information, so that the first site determines whether it agrees to establish a direct chain with the fifth site Specifically, the third direct link request message may carry the identifier information of the fifth node, the location information of the fifth node, the service information of the fifth node, or the capability information of the fifth node, to facilitate the The first node determines whether to agree to establish a direct link with the fifth node, and the embodiment of the present invention is not limited thereto.
  • the first station determines to agree to establish a direct link with the fifth station, send a second direct link acknowledgement message to the AP, where the second direct link acknowledgement message may include only one indication bit, and may also include the
  • the AP is used to determine information about a direct link between the fifth site and the first site, and the embodiment of the present invention is not limited thereto.
  • the second direct link acknowledgement message carries the identifier information of the direct link group, and when the data needs to be transmitted between the fifth station and the first station, the identifier information of the direct link group may be used to the AP.
  • the transmission resource is requested, and the transmission resource allocated by the AP to the direct link group is determined according to the identifier information of the direct link group, but the embodiment of the present invention is not limited thereto.
  • the second direct link setup response message includes at least one of the following information: location information of the first site, link state information of the fifth site and the first site. And information about the third site.
  • the method for establishing a direct link in a WLAN is mainly applied to a scheduling-based WLAN system, and the direct link group described by the direct link is determined by the AP in establishing a direct link.
  • the AP can perform unified management and scheduling on the direct link in the direct link packet, thereby reducing scheduling signaling overhead, improving spectrum resource utilization, improving network throughput, and improving user experience.
  • FIG. 13 shows a schematic flow diagram of a method 300 of establishing a direct link in a WLAN, in accordance with yet another embodiment of the present invention.
  • the method 300 includes:
  • STA1 sends a first direct link setup request message to the AP, requesting to establish a direct link with STA2.
  • the first direct link request message may include the identification information of the STA2, for example, the MAC address of the STA2, and the like, and may further include at least one of the following information: the identification information of the STA1, the location information of the STA1, the information of the STA3, and The link state information of the STA1 and the STA2, the STA1 can detect the STA3, but the embodiment of the present invention does not limit this.
  • S320. The AP determines whether the BSS to which the STA1 and the STA2 belong supports direct link communication. When the BSS does not support direct link communication, the AP performs S330, and the process of establishing the direct link ends; otherwise, the AP performs S340.
  • the AP sends a direct link setup reject message to STA1.
  • the AP determines whether STA2 has the capability of direct link communication.
  • the STA2 can report the capability of the direct link communication to the AP.
  • the AP2 Execution S350, the process of establishing a direct link ends; otherwise, the AP performs S360.
  • the AP sends a direct link setup reject message to STA1.
  • S360 The AP sends a second direct link setup request message to STA2, requesting STA2 to establish a direct link with STA1.
  • the second direct link setup request message may carry the information of the STA1, for example, the identifier information of the STA1, the location information of the STA1, the service information of the STA1, or the capability information of the STA1, so that the STA2 determines whether to agree to establish a direct link with the STA1.
  • the STA2 determines whether to agree to establish a direct link with the STA1.
  • Embodiments of the invention are not limited thereto.
  • the STA2 determines, according to the second direct link setup request message, whether to agree to establish a direct link with the STA1, and send a direct link setup response message to the AP.
  • the direct link setup response message may indicate that STA2 agrees to establish a direct link with STA1, and may also indicate that STA2 does not agree to establish a direct link with STA1.
  • S380 The AP determines, according to the direct link setup response message, whether the STA2 agrees to establish a direct link with the STA1.
  • the AP When the direct link setup response message indicates that the STA2 agrees to establish a direct link with the STA1, the AP performs S390, and the process of establishing the direct link ends; otherwise, the AP performs S394 and S398.
  • the AP sends a direct link setup reject message to STA1.
  • the AP determines a direct link group to which the direct link between STA1 and STA2 belongs.
  • the AP may determine a direct link group to which the direct link belongs based on multiple parameters.
  • the AP may determine the direct link according to interference between the direct link and other existing direct links.
  • the direct link group to which the direct path belongs may also be determined according to other parameters.
  • the direct link group to which the direct link belongs may be limited. It is an existing direct link group, or it can be a direct link group created by the AP. The embodiment does not limit this.
  • S398 The AP sends a direct link acknowledgement message to the STA1 and the STA2, where the direct link acknowledgement message includes the identifier information of the direct link group.
  • the method for establishing a direct link in a WLAN is mainly applied to a scheduling-based WLAN system, and the direct link group described by the direct link is determined by the AP in establishing a direct link.
  • the AP can perform unified management and scheduling on the direct link in the direct link packet, thereby reducing scheduling signaling overhead, improving spectrum resource utilization, improving network throughput, and improving user experience.
  • FIG. 14 shows a schematic flow diagram of a method 400 of scheduling a direct link, in accordance with an embodiment of the present invention
  • the STA sends a transmission resource request to the AP, and reports the service type of the STA in the transmission resource request, so that the AP determines the transmission resource required by the STA according to the service type of the STA.
  • the transmission resource request may further include information such as QoS of the site, and the embodiment of the present invention is not limited thereto.
  • the AP schedules a transmission resource for the STA, and sends resource scheduling indication information to the STA, where the resource scheduling indication information indicates the AP by using an identifier of a direct link group to which the direct link of the STA belongs.
  • the transmission resource allocated for the STA is a transmission resource allocated for the STA.
  • the AP may send the resource scheduling indication information only to the STAs included in the direct link group, and may also send the resource scheduling indication information to all the STAs associated with the AP.
  • the embodiment of the present invention is not limited thereto.
  • the direct link of the STA and other direct links in the direct link group perform data transmission on the transmission resource indicated by the resource scheduling indication information.
  • the STA determines whether the transmission resource allocated by the AP for the STA meets the data transmission requirement of the STA.
  • the resource scheduling process ends; otherwise, the STA performs S450.
  • the STA continues to request the transmission resource from the AP, and performs data transmission on the transmission resource allocated by the AP, until the transmission resource allocated by the AP satisfies the transmission requirement of the STA.
  • the method for establishing a direct link in a WLAN is mainly applied to a scheduling-based WLAN system, and the AP determines the direct in the process of establishing a direct link.
  • the direct link packet of the link enables the AP to perform unified management and scheduling on the direct link in the direct link packet, thereby reducing scheduling signaling overhead, improving spectrum resource utilization, and improving network throughput. And enhance the user experience.
  • FIG. 13 and FIG. 14 are intended to assist those skilled in the art to better understand the embodiments of the present invention, and are not intended to limit the scope of the embodiments of the present invention. A person skilled in the art will be able to make various modifications or changes in accordance with the examples of FIG. 13 and FIG. 14 which are within the scope of the embodiments of the present invention.
  • first, second, and “fifth” are used to distinguish different contents, and should not be construed as limiting the embodiments of the present invention.
  • the "first direct link setup request message” and the “second direct link request message” are both used to request the second site to establish a direct link with the first site, and should not be understood as requesting to establish a different direct link.
  • the "third direct link setup request message” is used to request the first station to establish a direct link with the fifth station.
  • a method of establishing a direct link in a WLAN according to an embodiment of the present invention is described in detail above with reference to FIG. 1 through FIG. 14, and an AP and a station according to an embodiment of the present invention will be described below with reference to FIGS. 15 through 19.
  • Figure 15 shows a schematic block diagram of an access point AP 500 in accordance with an embodiment of the present invention.
  • the AP 500 includes:
  • the receiving module 510 is configured to receive a first direct link setup request message sent by the first station, where the first direct link setup request message is used to request to establish a direct link with the second site;
  • a determining module 520 configured to determine, by the receiving module 510, the second station that is configured by the first direct link setup request message to establish a direct link with the first station, and determine the first site and the second site The direct link group to which the direct link belongs;
  • the sending module 530 is configured to send a direct link setup confirmation message to the first station and the second station, where the direct link setup acknowledgement message includes the identifier information of the direct link group determined by the determining module 520, to facilitate the The first station and the second station perform direct link communication according to the identification information of the direct link group.
  • an access point is mainly applied to a scheduling-based WLAN system.
  • the AP determines the direct link packet in the direct link in the process of establishing a direct link, so that the AP can uniformly manage and schedule the direct link in the direct link packet, thereby reducing the scheduling signal. Increase the utilization of spectrum resources, increase network throughput, and improve user experience.
  • the AP may group the direct links based on multiple parameters, optionally, the
  • the AP may group the direct link according to the interference situation between the direct links. For example, the interference between all the direct links in the same direct link group is lower than a certain preset threshold, so that the same direct link group
  • the multiple direct links may use the same transmission resource for data transmission without interference between each other.
  • the AP may also group the direct link according to other parameters, which is not performed by the embodiment of the present invention. limited.
  • the interference between any two direct links in the direct link group is lower than a preset interference value.
  • the determining module 520 is specifically configured to: when the first site and the basic service BSS to which the second site belongs, support direct link communication, and the second site has direct link communication capability And determining a direct link group to which the direct link between the first station and the second station belongs.
  • the determining module 520 may first determine whether the BSS to which the first station and the second station belong to support direct link communication, and when the determining module 520 determines that the BSS does not support direct link communication, the sending module 530 may Sending a direct link setup reject message to the first station; otherwise, the determining module 520 may further determine whether the second site has the capability of supporting direct link communication, where the determining module 520 may report the second station in advance.
  • the capability information determines whether the second site has the capability to support direct link communication.
  • the determining module 520 determines that the second site does not have the capability to support direct link communication
  • the determining module 520 determines that the second site is not A direct link can be established with the first station, and the sending module 530 can send a direct link setup reject message to the first station; otherwise, the determining module 520 can determine that the second site can establish a direct link with the first site.
  • the road but the embodiment of the invention is not limited thereto.
  • the sending module 530 is further configured to: before the determining module 520 determines a direct link group to which the direct link between the first site and the second site belongs, to the second Sending, by the station, a second direct link setup request message, where the second direct link setup request message is used to request the second station to establish a direct link with the first station;
  • the receiving module 510 is further configured to receive the second station sent by the second station according to the sending module 530. a direct link setup response message sent by the direct link setup request message, where the direct link setup response message is used to indicate that the second site agrees to establish a direct link with the first station;
  • the determining module 520 is specifically configured to determine, according to the direct link setup response message received by the receiving module 510, a direct link group to which the direct link between the first station and the second station belongs.
  • the determining module 520 is specifically configured to: determine, according to link state information of the first site and the second site, a direct link between the first site and the second site.
  • the AP may obtain the link state information from the first direct link request message or the direct link setup response message; when the link state information includes a signal strength, the AP may determine the first site according to the signal strength The transmit power of the direct link communication with the second station, or the AP directly obtains the transmit power information included in the link state information; and then the AP may determine the first site and the second site according to the transmit power
  • the interference range of the direct link between the direct links is determined so that the stations of other direct links in the direct link group are outside the interference range, but the embodiment of the present invention is not limited thereto.
  • the determining module 520 is specifically configured to: determine, according to location information of the first site, and location information of the second site, a direct link between the first site and the second site.
  • the AP may group the direct link between the first site and the second site into a same group as the direct link of the site farther from the first site and the second site, so that the AP The probability that the direct link between the first site and the second site interferes with other direct links in the direct link group is low, but the embodiment of the present invention is not limited thereto.
  • the determining module 520 is specifically configured to: determine, according to the information of the third site and the information of the fourth site, the direct link between the first site and the second site A link group, the first site is capable of listening to the third site, and the second site is capable of listening to the fourth site.
  • the AP may obtain the information of the third site and the fourth site from the first direct link setup request message sent by the first site and the direct link setup response message sent by the second site, but the embodiment of the present invention Not limited to this.
  • the determining module 520 is further configured to determine transmit power of direct link communication between the first station and the second station;
  • the sending module 530 is further configured to send, to the first station and the second station, transmit power indication information, where the transmit power indication information is used to indicate the transmit power determined by the determining module 520.
  • the AP 500 further includes:
  • An allocating module 540 configured to allocate a transmission resource to the direct link group
  • the sending module 530 is further configured to send resource scheduling indication information to all stations of the direct link group, where the resource scheduling indication information is used to indicate the transmission resource allocated by the allocating module 540 for the direct link group.
  • the receiving module 510 is further configured to receive, before the allocating module 540 allocates transmission resources for the direct link group, a transmission resource request sent by the first station or the second station, where The transmission resource request is used to request the wireless access point AP to allocate transmission resources for the direct link between the first station and the second station;
  • the allocating module 540 is specifically configured to allocate a transmission resource to the direct link group according to the transmission resource request received by the receiving module 510.
  • the AP in the method of establishing the direct link, and the above-mentioned and other operations and/or functions of the respective modules in the AP 500 are respectively implemented in order to implement the respective processes of the respective methods in FIGS. 1 to 14 . Narration.
  • the access point according to the embodiment of the present invention is mainly applied to a scheduling-based WLAN system, and the AP determines the direct link packet of the direct link in the process of establishing a direct link, so that the AP can
  • the direct link in the direct link packet is uniformly managed and scheduled, thereby reducing the overhead of scheduling signaling, improving the utilization of spectrum resources, improving network throughput, and improving the user experience.
  • Figure 17 shows a schematic block diagram of a station 600, as shown in Figure 17, which includes:
  • the sending module 610 is configured to send, to the wireless access point AP, a first direct link setup request message, where the first direct link setup request message is used to request to establish a direct link with the second site;
  • the receiving module 620 is configured to receive a first direct link setup acknowledgement message sent by the AP according to the first direct link setup request message sent by the sending module 610, where the first direct link setup acknowledgement message includes the first site Identification information of the direct link group to which the direct link with the second site belongs.
  • a station according to an embodiment of the present invention is mainly applied to a scheduling-based WLAN system. Determining the direct link packet in the direct link by the AP in the process of establishing a direct link, so that the AP can uniformly manage and schedule the direct link in the direct link packet, thereby reducing scheduling signaling. Overhead, improve spectrum resource utilization, increase network throughput, and enhance user experience.
  • the interference between any two direct links in the direct link group is lower than a preset interference value.
  • the first direct link setup request message sent by the sending module 610 includes at least one of the following information: location information of the first site, the first site, and the second The link state information of the site and the information of the third site, the first site can detect the third site.
  • the receiving module 620 is further configured to receive transmit power indication information sent by the AP, where the transmit power indication information is used to indicate a direct link between the first station and the second station. Transmit power of communication;
  • the site 600 also includes:
  • the direct link communication module 630 is configured to perform direct link communication with the second station by the transmit power indicated by the transmit power indication information received by the receiving module 620.
  • the receiving module 620 is further configured to receive the resource scheduling indication information that is sent by the AP, where the resource scheduling indication information is used to indicate the transmission resource allocated by the AP to the direct link group.
  • the site 600 also includes:
  • the data transmission module 640 is configured to perform data transmission between the transmission resource indicated by the resource scheduling indication information received by the receiving module 620 and the second station.
  • the sending module 610 is further configured to: before the receiving module 620 receives the resource scheduling indication information sent by the AP, send a transmission resource request, where the transmission resource request is used to request the AP. Allocating transmission resources for a direct link between the first station and the second station;
  • the receiving module 620 is specifically configured to receive resource scheduling indication information that is sent by the AP according to the transmission resource request sent by the sending module 610.
  • the receiving module 620 is further configured to receive a third direct link setup request message sent by the AP, where the third direct link setup request message is used to request the first site and the fifth The station establishes a direct link;
  • the sending module 610 is further configured to send a second direct link setup response message to the AP according to the third direct link setup request message received by the receiving module 620, where the second direct link setup response message is used to indicate the The first site agrees to establish a direct link with the fifth site;
  • the receiving module 620 is further configured to receive a direct link setup acknowledgement message sent by the AP according to the second direct link setup response message sent by the sending module 610, where the second direct link setup acknowledgement message includes the fifth site and Identification information of the direct link group to which the direct link between the first sites belongs.
  • the second direct link setup response message sent by the sending module 610 includes at least one of the following information: location information of the first site, the fifth site, and the first The link state information of the site and the information of the third site.
  • a site 600 in accordance with an embodiment of the present invention may correspond to a first one of the methods of establishing a direct link in a WLAN in accordance with an embodiment of the present invention, and the above and other operations and/or functions of the various modules in the site 600 are respectively The corresponding processes of the various methods in FIG. 1 to FIG. 14 are implemented, and are not described here.
  • the station according to the embodiment of the present invention is mainly applied to a scheduling-based WLAN system, and the AP determines the direct link packet of the direct link in the process of establishing a direct link, so that the AP can directly
  • the direct link in the road group is uniformly managed and scheduled, thereby reducing the overhead of scheduling signaling, improving the utilization of spectrum resources, improving network throughput, and improving the user experience.
  • FIG. 18 shows a schematic block diagram of an access point AP 700 in accordance with another embodiment of the present invention.
  • the AP 700 includes: a receiver 710, a processor 720, and a transmitter 730.
  • the receiver 710 is configured to receive a first direct link setup request message sent by the first station, where the first direct link setup request message is used to request to establish a direct link with the second site.
  • the processor 720 is configured to determine that the second station that the first direct link setup request message received by the receiver 710 is capable of establishing a direct link with the first station, and determine the first site and the second site.
  • the transmitter 730 is configured to send a direct link setup acknowledgement message to the first station and the second station, where the direct link setup acknowledgement message includes identifier information of the direct link group determined by the processor 720, to facilitate the The first station and the second station perform direct link communication according to the identification information of the direct link group.
  • an access point is mainly applied to a scheduling-based WLAN system.
  • the AP determines the direct link packet in the direct link in the process of establishing a direct link, so that the AP can uniformly manage and schedule the direct link in the direct link packet, thereby reducing the scheduling signal. Increase the utilization of spectrum resources, increase network throughput, and improve user experience.
  • the interference between any two direct links in the direct link group is lower than a preset interference value.
  • the processor 720 is specifically configured to: when the first site and the basic service BSS to which the second site belongs, support direct link communication, and the second site has direct link communication capability And determining a direct link group to which the direct link between the first station and the second station belongs.
  • the transmitter 730 is further configured to: before the processor 720 determines a direct link group to which the direct link between the first site and the second site belongs The station sends a second direct link setup request message, where the second direct link setup request message is used to request the second station to establish a direct link with the first station;
  • the receiver 710 is further configured to receive a direct link setup response message sent by the second station according to the second direct link setup request message sent by the sender 730, where the direct link setup response message is used to indicate the second The site agrees to establish a direct link with the first site;
  • the processor 720 is specifically configured to determine, according to the direct link setup response message received by the receiver 710, a direct link group to which the direct link between the first station and the second station belongs.
  • the processor 720 is specifically configured to: determine, according to link state information of the first site and the second site, a direct link between the first site and the second site.
  • the processor 720 is specifically configured to: determine, according to location information of the first site, location information of the second site, a direct link between the first site and the second site The direct link group to which the road belongs.
  • the processor 720 is specifically configured to: determine, according to the information of the third site and the information of the fourth site, the direct link between the first site and the second site A link group, the first site is capable of listening to the third site, and the second site is capable of listening to the fourth site.
  • the processor 720 is further configured to determine the first site and the first Transmit power for direct link communication between two stations;
  • the transmitter 730 is further configured to send transmit power indication information to the first station and the second station, where the transmit power indication information is used to indicate the transmit power determined by the processor 720.
  • the processor 720 is further configured to allocate a transmission resource to the direct link group
  • the transmitter 730 is further configured to send resource scheduling indication information to all stations of the direct link group, where the resource scheduling indication information is used to indicate the transmission resource allocated by the processor 720 for the direct link group.
  • the receiver 710 is further configured to: before the processor 720 allocates a transmission resource to the direct link group, receive a transmission resource request sent by the first station or the second station, where The transmission resource request is used to request the wireless access point AP to allocate transmission resources for the direct link between the first station and the second station;
  • the processor 720 is specifically configured to allocate a transmission resource to the direct link group according to the transmission resource request received by the receiver 710.
  • the processor 720 may be a central processing unit (Central)
  • the Processing Unit can also be other general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs), or other programmable Logic devices, discrete gates or transistor logic devices, discrete hardware components, and more.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs off-the-shelf programmable gate arrays
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor 720 or an instruction in the form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software modules can be located in random memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, etc., which are well established in the art.
  • the storage medium is located in the memory, and the processor 720 reads the information in the memory and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the AP in the method of establishing a direct link, and the above-mentioned and other operations and/or functions of the respective modules in the AP 700 are respectively implemented in order to implement the respective processes of the respective methods in FIGS. 1 to 14 . Narration.
  • an access point is mainly applied to a scheduling-based WLAN system.
  • the AP determines the direct link packet in the direct link in the process of establishing a direct link, so that the AP can uniformly manage and schedule the direct link in the direct link packet, thereby reducing the scheduling signal. Increase the utilization of spectrum resources, increase network throughput, and improve user experience.
  • FIG. 19 shows a schematic block diagram of a station 800, as shown in FIG. 19, including a transmitter 810 and a receiver 820, in accordance with another embodiment of the present invention.
  • the transmitter 810 is configured to send a first direct link setup request message to the wireless access point AP, where the first direct link setup request message is used to request to establish a direct link with the second station; Receiving, by the AP, a first direct link setup acknowledgement message sent by the first direct link setup request message sent by the sender 810, where the first direct link setup acknowledgement message includes the first site and the second site Identification information of the direct link group to which the direct link belongs.
  • the station according to the embodiment of the present invention is mainly applied to a scheduling-based WLAN system, and the AP determines the direct link packet of the direct link in the process of establishing a direct link, so that the AP can directly
  • the direct link in the road group is uniformly managed and scheduled, thereby reducing the overhead of scheduling signaling, improving the utilization of spectrum resources, improving network throughput, and improving the user experience.
  • the interference between any two direct links in the direct link group is lower than a preset interference value.
  • the first direct link setup request message sent by the sender 810 includes at least one of the following information: location information of the first site, the first site, and the second The link state information of the site and the information of the third site, the first site can detect the third site.
  • the receiver 820 is further configured to receive transmit power indication information sent by the AP, where the transmit power indication information is used to indicate a direct link between the first station and the second station. Transmit power of communication;
  • the site 800 also includes:
  • the processor 830 is configured to perform direct link communication with the second station by the transmit power indicated by the transmit power indication information received by the receiver 820.
  • the receiver 820 is further configured to receive resource scheduling indication information that is sent by the AP, where the resource scheduling indication information is used to indicate the transmission resource allocated by the AP to the direct link group.
  • the site 800 also includes:
  • the processor 830 is configured to perform data transmission between the transmission resource indicated by the resource scheduling indication information received by the receiver 820 and the second station.
  • the transmitter 810 is further configured to: before the receiver 820 receives the resource scheduling indication information sent by the AP, send a transmission resource request to the AP, where the transmission resource request is used to request the AP. Allocating transmission resources for a direct link between the first station and the second station;
  • the receiver 820 is specifically configured to receive resource scheduling indication information that is sent by the AP according to the transmission resource request sent by the transmitter 810.
  • the receiver 820 is further configured to receive a third direct link setup request message sent by the AP, where the third direct link setup request message is used to request the first site and the fifth The station establishes a direct link;
  • the transmitter 810 is further configured to send, according to the third direct link setup request message received by the receiver 820, a second direct link setup response message to the AP, where the second direct link setup response message is used to indicate the The first site agrees to establish a direct link with the fifth site;
  • the receiver 820 is further configured to receive a direct link setup acknowledgement message sent by the AP according to the second direct link setup response message sent by the transmitter 810, where the second direct link setup acknowledgement message includes the fifth site and Identification information of the direct link group to which the direct link between the first sites belongs.
  • the second direct link setup response message sent by the sender 810 includes at least one of the following information: location information of the first site, the fifth site, and the first The link state information of the site and the information of the third site.
  • the processor 830 may be a central processing unit (Central)
  • the Processing Unit can also be other general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs), or other programmable Logic devices, discrete gates or transistor logic devices, discrete hardware components, and more.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs off-the-shelf programmable gate arrays
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor 830 or an instruction in the form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in random access memory, flash memory, read only memory, programmable only Read memory or electrically erasable programmable memory, registers, etc., which are well-established in the field of storage media.
  • the storage medium is located in the memory, and the processor 830 reads the information in the memory and completes the steps of the above method in combination with the hardware. To avoid repetition, it will not be described in detail here.
  • a site 800 in accordance with an embodiment of the present invention may correspond to a first site in a method of establishing a direct link in a WLAN in accordance with an embodiment of the present invention, and the above and other operations and/or functions of the various modules in the site 800 are respectively The corresponding processes of the various methods in FIG. 1 to FIG. 14 are implemented, and are not described here.
  • the station according to the embodiment of the present invention is mainly applied to a scheduling-based WLAN system, and the AP determines the direct link packet of the direct link in the process of establishing a direct link, so that the AP can directly
  • the direct link in the road group is uniformly managed and scheduled, thereby reducing the overhead of scheduling signaling, improving the utilization of spectrum resources, improving network throughput, and improving the user experience.
  • the term "and/or” is merely an association relationship describing an associated object, indicating that there may be three relationships.
  • a and / or B can mean: A exists separately, there are A and B, and there are three cases of B alone.
  • the character " /" in this article generally indicates that the contextual object is an "or" relationship.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separate, 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 objectives of the embodiments of the present invention.
  • 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 above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included 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 USB flash drive, a mobile hard disk, a read-only memory (called “ROM”), a random access memory (“RAM” called “RAM”), a disk or A variety of media such as optical discs that can store program code.

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

Abstract

L'invention concerne un procédé d'établissement d'une liaison directe dans un réseau local sans fil (WLAN, Wireless Local Area Network), un point d'accès et une station. Le procédé consiste à : recevoir un premier message de demande d'établissement d'une liaison directe envoyé par une première station, le premier message de demande d'établissement d'une liaison directe étant utilisé pour demander d'établir une liaison directe avec une seconde station (110) ; lorsqu'il est déterminé que la seconde station peut établir une liaison directe avec la première station, déterminer un groupe de liaisons directes auquel appartient la liaison directe entre la première station et la seconde station (120) ; et envoyer un message de confirmation d'établissement d'une liaison directe à la première station et à la seconde station, le message de confirmation d'établissement d'une liaison directe comprenant des informations d'identification concernant le groupe de liaisons directes de manière à permettre à la première station et à la seconde station d'effectuer une communication de liaison directe conformément aux informations d'identification concernant le groupe de liaisons directes (130). Conformément au procédé d'établissement d'une liaison directe dans un WLAN selon les modes de réalisation de la présente invention, un point d'accès (AP, Access Point) déterminant un groupe de liaisons directes auquel appartient une liaison directe lors du processus d'établissement de la liaison directe peut augmenter le débit d'un réseau.
PCT/CN2013/087525 2013-11-20 2013-11-20 Procédé et appareil d'établissement d'une liaison directe dans un réseau local sans fil WO2015074199A1 (fr)

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CN201380077332.3A CN105284175B (zh) 2013-11-20 2013-11-20 在无线局域网中建立直接链路的方法及装置
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CN113938490B (zh) * 2020-07-13 2023-04-07 成都极米科技股份有限公司 建立点对点通信连接的方法、装置及存储介质
CN114006908B (zh) * 2020-07-13 2023-03-10 成都极米科技股份有限公司 一种点对点通信资源分配的方法及终端
CN114079881B (zh) * 2020-08-13 2024-05-17 华为技术有限公司 一种通信方法及装置
WO2024216518A1 (fr) * 2023-04-18 2024-10-24 北京小米移动软件有限公司 Procédé et appareil de communication, dispositif et support de stockage

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