WO2014101490A1 - Relay node selection method and apparatus - Google Patents

Abstract

Provided are a relay node selection method and apparatus. The method comprises: an AP receiving relay indication information sent by a relay node, and establishing an association with the relay node according to the relay indication information; the AP receiving an association request message sent by an STA, and establishing an association with the STA according to the association request message; and the AP determining a destination relay node corresponding to the STA in the associated relay node, so as to communicate with the STA through the destination relay node. In the embodiments of the present invention, by adding a relay mechanism between the AP and the STA, the AP is associated with the relay node and the STA, obtains the destination relay node corresponding to the STA and selected by the STA or the AP, and then communicates with the STA through the destination relay node, thereby improving the throughput of the system, and solving the problem of sharply decreased throughput and low communication reliability caused due to the wide WLAN coverage.

Description

 Description

 The present invention relates to communication technologies, and in particular, to a relay node selection method and apparatus. Background technique

 With the development of communication technologies, wireless local area networks (WLANs) are being used more and more. In the prior art, in the WLAN system, access points (access points, called APs) and sites (Station, the barrel is called STA) The method of direct communication is adopted.

 However, in the prior art, when the coverage of the AP is large, for example, the coverage of the AP reaches 1 km, direct communication between the AP and the STA may result in a significant drop in throughput and low communication reliability. Summary of the invention

 The embodiments of the present invention provide a method and a device for selecting a relay node, which are used to solve the problem that the throughput is decreased and the communication reliability is low when the WLAN coverage is large.

 A first aspect of the embodiments of the present invention provides a method for selecting a relay node, including: receiving, by an access point AP, relay indication information sent by a relay node, and establishing, according to the relay indication information, the relay node Association

 Receiving, by the AP, an association request message sent by the STA, and establishing an association with the STA according to the association request message;

 And determining, by the AP, the destination relay node corresponding to the STA, in the establishing the associated relay node, to communicate with the STA by using the destination relay node.

 With reference to the first aspect, in a first implementation manner of the first aspect, the determining, by the AP, the destination relay node corresponding to the STA, in the establishing the associated relay node, includes:

Determining, by the AP, a mapping relationship between the STA and the associated relay node, determining a candidate relay node corresponding to the STA, and sending a channel measurement request frame to the candidate relay node for the to-be-selected The relay broadcast channel measurement frame, so that the STA is based on the received channel a measurement frame, selecting a relay node from the candidate relay node as a destination relay node; and receiving, by the STA, a first notification message that is sent by the STA and carrying the identifier of the destination relay node, and according to Determining, by the destination relay node, a destination relay node corresponding to the STA

 With reference to the first aspect, in a second implementation manner of the first aspect, the determining, by the eNB, the destination relay node corresponding to the STA,

 The ΑΡ broadcast channel measurement request frame, for the relay node associated with the ΑΡ in the entire network to broadcast a channel measurement frame according to the received channel measurement request frame, so that the STA according to the received a channel measurement frame, selecting a relay node from the relay nodes that are associated with the UI in the entire network, as a destination relay node;

 Receiving, by the STA, a first notification message that is sent by the STA and carrying the identifier of the destination relay node, and determining, according to the identifier of the destination relay node, a destination relay node corresponding to the STA

 With reference to the first aspect, in a third implementation manner of the first aspect, the determining, by the eNB, the destination relay node corresponding to the STA,

 Determining, by the ΑΡ, each relay node that is associated with the ΑΡ in the BSS to which the ΑΡ belongs, as a candidate relay node, and sending the identifier of the candidate relay node to the STA for the STA And sending, according to the identifier of the candidate relay node, a channel measurement request frame to the candidate relay node, and selecting a relay node from the candidate relay node according to the received channel measurement frame, as a destination relay a channel measurement frame is a channel measurement frame broadcast by the candidate relay node; the UI receives a first notification message that is sent by the STA and carries an identifier of the destination relay node, and according to the destination An identifier of the relay node, determining a destination relay node corresponding to the STA

 With reference to the first aspect, in a fourth implementation manner of the first aspect, the determining, by the eNB, the destination relay node corresponding to the STA,

 ΑΡ measuring location information of the STA;

 Determining, according to the location information, a destination relay node corresponding to the STA, where the destination relay node corresponding to the STA is smaller than other relays The distance between the node and the STA;

Then the method further includes: The AP carries the identifier of the destination relay node in a second notification message and sends the identifier to the STA and the destination relay node.

 A second aspect of the embodiments of the present invention provides a method for selecting a relay node, including:

 The STA sends an association request message to the access point AP, so that the AP establishes an association with the STA according to the association request message.

 Determining, by the STA, a destination relay node corresponding to the STA, and communicating with the AP according to the destination relay node, where the destination relay node is associated with the AP.

 With reference to the second aspect, in a first implementation manner of the second aspect, the determining, by the STA, the destination relay node corresponding to the STA, includes:

 Receiving, by the STA, a channel measurement frame broadcast by the candidate relay node, and selecting a relay node from the candidate relay node as the destination relay node according to the channel measurement frame;

 Then the method further includes:

 The STA carries the identifier of the destination relay node in the first notification message and sends the identifier to the AP and the destination relay node.

 With reference to the second aspect, in a second implementation manner of the second aspect, the STA determines

The destination relay node corresponding to the STA includes:

 Receiving, by the STA, an identifier of the candidate relay node that is sent by the AP, and sending a channel measurement request frame to the candidate relay node according to the identifier of the to-be-selected relay node;

 Receiving, by the STA, the channel measurement frame sent by the to-be-selected relay node according to the channel measurement request frame, and selecting a relay node from the candidate relay node as the destination relay node according to the channel measurement frame ;

 Then the method further includes:

 The STA carries the identifier of the destination relay node in the first notification message and sends the identifier to the AP and the destination relay node.

 With reference to the second aspect, in a third implementation manner of the second aspect, the STA determines

The destination relay node corresponding to the STA includes:

 The STA receives the second notification that is sent by the AP and carries the identifier of the destination relay node. The third aspect of the present invention provides a relay node selection method, including:

The relay node sends the relay indication information to the AP, so that the AP is configured according to the relay indication information. Establishing an association with the relay node;

 Receiving, by the relay node, a channel measurement request frame, and broadcasting a channel measurement frame according to the channel measurement request frame, for listening to the STA that sends the channel measurement frame, and broadcasting the channel measurement frame according to the channel measurement frame One of the relay nodes associated with the AP is selected as the destination relay node corresponding to the STA.

 With reference to the third aspect, in a first implementation manner of the third aspect, the receiving, by the relay node, the channel measurement request frame includes:

 The relay node receives a channel measurement request frame sent by an AP or a STA.

 With the third aspect, in a second implementation manner of the third aspect, the method further includes: if the relay node is used as the destination relay node, the receiving STA sends the destination relay The first notification message of the identifier of the node, or the second notification message that is sent by the AP and carries the identifier of the destination relay node.

 A fourth aspect of the embodiments of the present invention provides an access point, including:

 a receiving module, configured to receive relay indication information sent by the relay node, and establish an association with the relay node according to the relay indication information;

 The receiving module is further configured to receive an association request message sent by the STA, and establish an association with the STA according to the association request message.

 And a determining module, configured to determine, in the relay node that establishes the association, a destination relay node corresponding to the STA, to communicate with the STA by using the destination relay node.

 With reference to the fourth aspect, in a first implementation manner of the fourth aspect, the determining module includes: a determining unit, configured to: perform, by the AP, the mapping between the STA and the associated relay node, and determine the mapping relationship with the STA The candidate relay node;

 a sending unit, configured to send a channel measurement request frame to the candidate relay node, where the candidate relay node broadcasts a channel measurement frame, so that the STA receives the channel measurement frame according to the received Selecting one of the relay nodes as the destination relay node;

 The determining unit is further configured to: when the receiving module receives the first notification message that is sent by the STA and carries the identifier of the destination relay node, determine, according to the identifier of the destination relay node, The destination relay node corresponding to the STA.

 With reference to the fourth aspect, in a second implementation manner of the fourth aspect, the method further includes:

a broadcast module, configured to broadcast a channel measurement request frame, for associating with the AP in the entire network The relay node broadcasts a channel measurement frame according to the received channel measurement request frame, so that the STA establishes a relay node associated with the AP from the entire network according to the received channel measurement frame. Select a relay node as the destination relay node;

 The determining module is specifically configured to: when the receiving module receives the first notification message that is sent by the STA and carries the identifier of the destination relay node, determine, according to the identifier of the destination relay node, The destination relay node corresponding to the STA.

 With reference to the fourth aspect, in a third implementation manner of the fourth aspect, the determining module includes: a determining unit, configured to use, as a to-be-selected, a relay node that is associated with the AP in a BSS to which the AP belongs Following node

 a sending unit, configured to send an identifier of the candidate relay node to the STA, where

Sending, by the STA according to the identifier of the candidate relay node, a channel measurement request frame to the candidate relay node, and selecting a relay node from the candidate relay node according to the received channel measurement frame, as a destination a channel measurement frame is a channel measurement frame broadcast by the to-be-selected relay node; the determining unit is further configured to: when receiving, by the STA, the first notification message that carries the identifier of the destination relay node And determining, according to the identifier of the destination relay node, a destination relay node corresponding to the STA.

 With reference to the fourth aspect, in a fourth implementation manner of the fourth aspect, the acquiring module includes: a measuring unit, configured to measure location information of the STA;

 a determining unit, configured to determine, according to the location information, a destination relay node corresponding to the STA in the relay node that establishes the association, where a distance between the destination relay node corresponding to the STA and the STA is smaller than other The distance between the relay node and the STA;

 The access point further includes:

 And a sending module, configured to carry the identifier of the destination relay node in the second notification message, and send the identifier to the STA and the destination relay node.

 A fifth aspect of the embodiments of the present invention provides a station, including:

 a sending module, configured to send an association request message to the access point AP, where the AP establishes an association with the STA according to the association request message;

 And a determining module, configured to determine a destination relay node corresponding to the STA, and according to the destination, the relay node communicates with the AP, where the destination relay node is associated with the AP.

With reference to the fifth aspect, in a first implementation manner of the fifth aspect, the site further includes: a receiving module, configured to receive a channel measurement frame broadcast by the candidate relay node;

 The determining module is specifically configured to select, according to the channel measurement frame, a relay node from the candidate relay node as a destination relay node;

 The sending module is further configured to carry the identifier of the destination relay node in the first notification message and send the identifier to the AP and the destination relay node.

 With reference to the fifth aspect, in a second implementation manner of the fifth aspect, the receiving module is further configured to receive an identifier of the to-be-selected relay node that is sent by the AP;

 And the determining module is configured to send, by the sending module, a channel measurement request frame to the candidate relay node according to the identifier of the candidate relay node, and receive, by the receiving module, the candidate relay node. And selecting, according to the channel measurement frame, a relay node from the candidate relay node as a destination relay node according to the channel measurement frame; the sending module is further used to The identifier of the destination relay node is carried in the first notification message and sent to the AP and the destination relay node.

 With reference to the fifth aspect, in a third implementation manner of the fifth aspect, the receiving module is further configured to receive a second notification message that is sent by the AP and that carries an identifier of the destination relay node;

 And the acquiring module is specifically configured to use, according to the second notification message, a relay node corresponding to the identifier of the destination relay node as a destination relay node.

 A sixth aspect of the embodiments of the present invention provides a relay node, including:

 a sending module, configured to send the relay indication information to the AP, where the AP establishes an association with the relay node according to the relay indication information;

 a receiving module, configured to receive a channel measurement request frame;

 The sending module is further configured to: according to the channel measurement request frame, broadcast a channel measurement frame, to listen to the STA that sends the channel measurement frame, and according to the channel measurement frame, measure the frame from the broadcast channel, and One of the relay nodes that associates the APs is selected as a destination relay node corresponding to the STA.

 With reference to the sixth aspect, in a first implementation manner of the sixth aspect, the receiving module is specifically configured to receive a channel measurement request frame sent by an AP or a STA.

With reference to the sixth aspect, in a second implementation manner of the sixth aspect, the receiving module is further configured to receive a first notification message that is sent by the STA and that carries the identifier of the destination relay node, or A second notification message carrying the identity of the destination relay node. In the embodiment of the present invention, by adding a relay mechanism between the AP and the STA, the AP associates with the relay node and the STA, and acquires the destination relay node corresponding to the STA selected by the STA or the AP, by using the destination. The relay node communicates with the STA to improve the throughput of the system, and solves the problem that when the WLAN coverage is large, the throughput is greatly reduced and the communication reliability is low. DRAWINGS

 In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below, and obviously, the attached in the following description The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

 1 is a schematic flowchart of a relay node selection method according to an embodiment of the present invention; FIG. 3 is a schematic flowchart of a relay node selection method according to another embodiment of the present invention; FIG. 4 is a schematic diagram of a signaling flow of a relay node selection method according to another embodiment of the present invention; FIG. 5 is a signaling flow of still another embodiment of a relay node selection method according to the present invention; FIG. 6 is a schematic diagram of a signaling flow of another embodiment of a method for selecting a relay node according to the present invention; FIG. 7 is a schematic diagram of a signaling flow of another embodiment of a method for selecting a relay node according to the present invention; A schematic structural diagram of an embodiment of an access point provided by the invention;

 9 is a schematic structural diagram of still another embodiment of an access point provided by the present invention;

 FIG. 10 is a schematic structural diagram of still another embodiment of an access point according to the present invention; FIG.

 FIG. 11 is a schematic structural diagram of another embodiment of an access point according to the present invention;

 12 is a schematic structural diagram of an embodiment of a station provided by the present invention;

 13 is a schematic structural diagram of another embodiment of a site provided by the present invention;

 FIG. 14 is a schematic structural diagram of an embodiment of a relay node according to the present invention; FIG.

 15 is a schematic structural diagram of another access point according to an embodiment of the present invention;

 16 is a schematic structural diagram of another site according to an embodiment of the present invention;

 FIG. 17 is a schematic structural diagram of another embodiment of a relay node according to the present invention. detailed description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the drawings, and the embodiments are described as a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

 FIG. 1 is a schematic flowchart of a method for selecting a relay node according to an embodiment of the present invention. As shown in FIG. 1 , the executor of the embodiment is an AP, and the method includes:

 S101. The AP receives the relay indication information sent by the relay node, and associates with the relay node according to the relay indication information.

 In this embodiment, the relay indication information may be sent as an independent frame, or may be carried in an association request frame sent by the relay node to the AP, where the relay indication information includes a relay capability indication, and is used to indicate The AP may use the node as a relay node, and the relay indication information may further include location information, capability information, and the like of the relay node, for example, processing speed, or the maximum number of supported nodes, etc., which need to be explained. Yes, the AP can associate multiple relay nodes at the same time.

 S102: The AP receives an association request message sent by the STA, and associates with the STA according to the association request message.

 Specifically, the AP may receive the association request message sent by the STA, and then reply to the STA for the association request response message, and the association is successfully established.

 5103. The AP determines, by the AP node that is associated with, the destination relay node corresponding to the STA, to communicate with the STA by using the destination relay node.

 In this embodiment, there may be multiple relay nodes for the same STA to provide relay services for it. Preferably, the STA may select one of the relay nodes associated with the AP as the destination relay node, that is, the relay node that finally provides the relay service for the AP and the STA communication. After the selection is completed, The AP needs to notify the AP of its selection result, and the AP knows which relay node to communicate with the STA. Alternatively, the AP may select a suitable relay node as the destination relay node and assign it to the STA.

In this embodiment, the AP is associated with the relay node and the STA, and the destination relay node corresponding to the STA is determined by the relay node associated with the AP, to pass the destination relay node and the destination node. The STA communicates, and the relay mechanism is added between the AP and the STA, thereby solving the problem that when the WLAN coverage is large, the throughput is greatly reduced and the communication reliability is low, thereby effectively improving the throughput of the system. Further, in another embodiment of the present invention, the AP in the S103 determines the destination relay node corresponding to the STA in the associated relay node, and may have the following four implementation manners:

In the first mode, the AP queries the mapping relationship between the STA and the associated relay node, determines the candidate relay node corresponding to the STA, and sends a channel measurement request frame to the candidate relay node for The candidate relay node broadcasts a channel measurement frame, so that the STA selects a relay node from the candidate relay nodes as the destination relay node according to the received channel measurement frame. The AP receives the first notification message that is sent by the STA and carries the identifier of the destination relay node, and determines the destination relay node corresponding to the STA according to the identifier of the destination relay node.

 Specifically, the AP queries the mapping relationship between the STA and the foregoing relay node that is associated with the AP, that is, determines which relay nodes can provide the relay service for the STA, and uses the relay node as the candidate relay node, and then the AP adopts The polling method sequentially sends channel measurement request frames to the candidate relay nodes, that is, sequentially sends channel measurement request frames to each candidate relay node in a unicast manner; and these candidate relay nodes select frames according to channel measurement requests. The channel measurement frame is sent in the form of a broadcast, and the STA selects by listening to the channel measurement frames, wherein the channel measurement frames may be null data frames dedicated to channel measurement, and the STA can obtain the channel condition of the relay node to the STA through the frame. When the STA selects, the relay node with the strongest signal can be selected as the destination relay node according to the signal strength of the channel measurement frame, but is not limited thereto. In addition, the STA may also choose not to use the relay node. For example, the STA detects that all available relay nodes have weak signal strength according to the channel measurement frame, or the STA can select not when the signal strength of the AP to the STA is strong enough. The relay node is used, and the existing technology directly communicates with the AP.

 After the STA selects the relay node according to the channel measurement frame, the AP needs to be notified of the selection result and the selected target relay node, and then the identifier of the destination relay node can be carried in a notification message. Send to the above AP and destination relay node.

 2) In the second mode, the AP broadcasts a channel measurement request frame for establishing an association with the AP in the entire network, and the relay node transmits a channel measurement frame according to the received channel measurement request frame, so that the STA receives the The above channel measurement frame is selected from the above-mentioned AP-associated relay node in the whole network as a destination relay node. The AP receives the first notification message that is sent by the STA and carries the identifier of the destination relay node, and determines the destination relay node corresponding to the STA according to the identifier of the destination relay node.

It should be noted that the foregoing relay node sends a channel measurement frame to the STA in a competitive manner. The method of the competition may specifically refer to the carrier sense multiple access/collision detection (CSMA/CA) channel access mode in the WLAN, that is, all the stations that need to access the channel perform random backoff after detecting that the channel is idle. After the channel access is initiated.

 In the third mode, the AP uses the relay node associated with the AP in the BSS to which the AP belongs as the candidate relay node, and sends the identifier of the candidate relay node to the STA for the STA. And sending, to the STA, the STA, according to the identifier of the to-be-selected relay node, to send a channel measurement request frame to the candidate relay node according to the identifier of the candidate relay node, and according to the received channel measurement frame, One of the selected relay nodes is selected as the destination relay node, wherein the channel measurement frame is a channel measurement frame broadcast by the candidate relay node. The AP receives the first notification message that is sent by the STA and carries the identifier of the destination relay node, and determines the destination relay node corresponding to the STA according to the identifier of the destination relay node.

 In the specific implementation process, the AP is to notify the STA of the basic service set (the basic service set, the BSS) to associate with the AP, and may send the identifiers of the candidate relay nodes to the STA, for example, The identifiers of the relay nodes are carried in a list form in a notification message and sent to the STA or the like.

 4) In the fourth mode, the AP first measures the location information of the STA; the AP then determines, according to the location information, the destination relay node corresponding to the STA in the associated relay node, and the destination corresponding to the STA The distance between the relay node and the STA is smaller than the distance between other relay nodes and the STA.

 It should be noted that, the manner in which the AP measures the location information of the STA may be any one of the prior art. For example, the STA obtains location information and provides the AP to the AP through a Global Positioning System (GPS), or the foregoing. The AP can measure the channel status of each location to the AP in advance, and the AP can obtain the location information of the STA according to the channel of the STA to the AP, and then the AP selects the relay node closest to the STA as the destination relay node; When the AP selects the destination relay node, it can select from the relay nodes associated with the AP;

 Further, in this manner, the AP carries the identifier of the destination relay node in the second notification message and sends the identifier to the STA and the destination relay node.

In a specific implementation process, the second notification message may be included in a relay node allocation frame. 2 is a schematic flowchart of still another embodiment of a relay node selection method according to the present invention. As shown in FIG. 2, the STA of the execution entity in this embodiment includes: S201. The STA sends an association request message to the AP, so that the AP establishes an association with the STA according to the association request message.

 In this embodiment, the AP may perform the technical solution of the foregoing method embodiment shown in FIG. 1 , and the implementation principles are similar, and details are not described herein again.

 S202. The STA determines a destination relay node corresponding to the STA, and communicates with the AP according to the destination, where the destination relay node is associated with the AP.

 In this embodiment, multiple relay nodes may be provided with relay services for the same STA, and therefore, the STA needs to select one of them as the destination relay node, that is, the relay service is finally provided for the foregoing AP and STA communication. After the completion of the selection, the AP needs to notify the AP of its selection result, and the AP knows which relay node to communicate with the STA. Of course, the AP can also select a suitable destination relay node and assign it to the STA. It is noted that these relay nodes are relay nodes that are associated with the AP.

 In this embodiment, the STA sends an association request message to the AP, so that the AP associates with the STA according to the association request message, and determines a destination relay node corresponding to the STA, and finally, according to the destination relay node and The AP communication solves the problem that the throughput is greatly reduced and the communication reliability is low when the WLAN coverage is large due to the addition of a relay mechanism between the AP and the STA, thereby effectively improving the throughput of the system.

 Further, in another embodiment of the present invention, corresponding to the method embodiment shown in FIG. 2, the STA determines the destination relay node corresponding to the STA in S201, and may implement three implementation manners, as follows:

 1) In the first mode, the STA receives the channel measurement frame broadcast by the candidate relay node, and selects a relay node from the candidate relay node as the destination relay node according to the channel measurement frame, and then the STA The identifier of the destination relay node is carried in the first notification message and sent to the AP and the destination relay node.

 Before receiving the channel measurement frame sent by the candidate relay node, the relay node may be a channel measurement request frame that is sent by the receiving AP in a polling manner, or may be a channel measurement request frame that the receiving AP broadcasts to the entire network. For the method, refer to the first mode or the second mode in the method embodiment shown in FIG. 1 , and details are not described herein again.

2) In the second mode, the STA receives the identifier of the candidate relay node that is sent by the AP, and sends a channel measurement request frame to the candidate relay node according to the identifier of the candidate relay node to be selected; Receiving, by the candidate relay node, a channel measurement frame sent according to the channel measurement request frame, and selecting a relay node from the candidate relay node as the destination relay node according to the channel measurement frame;

 In this manner, the STA carries the identifier of the destination relay node in the first notification message and sends the identifier to the AP and the destination relay node. Specifically, the method may refer to the third embodiment in the embodiment shown in FIG. This way will not be repeated here.

 In the third mode, the STA receives the second notification message that is sent by the AP and carries the identifier of the destination relay node, that is, the AP notifies the STA of the destination relay node that is selected by the AP. The fourth mode in the embodiment is not described herein.

 FIG. 3 is a schematic flowchart of still another embodiment of a relay node selection method according to the present invention. As shown in FIG. 3, the relay node of the execution entity in this embodiment includes:

 S301. The relay node sends the relay indication information to the AP, so that the AP establishes an association with the relay node according to the relay indication information.

 In this embodiment, the AP may perform the technical solution of the foregoing method embodiment shown in FIG. 1, but the principle is similar, and is not mentioned here.

 S302. The foregoing relay node receives a channel measurement request frame, and broadcasts a channel measurement frame according to the channel measurement request frame, for listening to the STA that sends the channel measurement frame, according to the channel measurement frame, from the broadcast channel measurement frame, And selecting one of the relay nodes associated with the AP as the destination relay node corresponding to the STA.

 In this embodiment, the STA may perform the technical solution of the foregoing method embodiment shown in FIG. 2, and the implementation principles thereof are similar, and details are not described herein again.

 In this embodiment, the relay node sends the relay indication information to the AP, so that the AP connects to the relay point according to the relay indication information, and receives the channel measurement request frame, and broadcasts the request frame according to the channel, and broadcasts a channel measurement frame for listening to the STA that transmits the channel measurement frame, according to the channel measurement frame, selecting a relay node from the relay node of the broadcast channel measurement frame as the destination relay node corresponding to the STA, thereby The AP communicates with the STA through the destination relay node, which solves the problem that when the WLAN coverage is large, the throughput is greatly reduced and the communication reliability is low, thereby improving the throughput of the system.

 Further, in another embodiment of the present invention, on the basis of the foregoing embodiment shown in FIG. 3, the specific implementation manner of receiving the channel measurement request frame by the relay node in S302 may be:

Receive a channel measurement request frame sent by the AP or the STA. Further, in still another embodiment of the present invention, on the basis of the foregoing embodiment shown in FIG. 3, if the relay node is used as the destination relay node, the method further includes:

 Receiving a first notification message that is sent by the STA and carrying the identifier of the destination relay node, or receiving a second notification message that is sent by the AP and carrying the identifier of the destination relay node.

 In this embodiment, whether the AP or the STA selects the destination relay node, the selected relay node is notified of the selection result for further communication.

 In this embodiment, by adding a relay mechanism between the AP and the STA, the AP establishes an association with the relay node and the STA, and acquires a destination relay node corresponding to the STA selected by the STA or the AP, by using the destination. The communication between the node and the STA can improve the throughput of the system and solve the problem that when the WLAN coverage is large, the throughput is greatly reduced and the communication reliability is low.

 FIG. 4 is a schematic diagram of a signaling flow of a relay node selection method according to another embodiment of the present invention. As shown in FIG. 4, the method includes:

 S401. The relay node sends the relay indication information to the AP.

 In this embodiment, the relay node may provide its own message through the relay indication information.

 S402. The AP establishes an association with the relay node according to the relay indication information.

 S403: The STA sends an association request message to the AP.

 S404: The AP establishes an association with the STA according to the association request message.

 S405. The AP queries the mapping relationship between the STA and the associated relay node, and determines the candidate relay node corresponding to the STA.

 S406. The AP sequentially sends a channel measurement request frame to the candidate relay node.

 S407. The candidate relay node broadcasts a channel measurement frame for the STA to monitor.

 In this embodiment, the number of the candidate relay nodes may be multiple, and each of the candidate relay nodes may broadcast a channel measurement frame for the STA to monitor.

 It should be noted that the relay node shown in FIG. 4 is a candidate relay node.

 S408. The STA receives the channel measurement frame, and selects one of the candidate relay nodes as the destination relay node according to the channel measurement frame.

 S409: The STA carries the identifier of the destination relay node in the first notification message and sends the identifier to the AP.

5410. The STA carries the identifier of the destination relay node in the first notification message and sends the identifier to the destination relay node.

Among them, S409 and S410 can be executed simultaneously. FIG. 5 is a schematic flowchart of still another embodiment of a method for selecting a relay node according to the present invention. As shown in FIG. 5, the method includes:

 5501. The relay node sends a relay indication information to the AP.

 S502. The AP establishes an association with the relay node according to the relay indication information.

 S503. The STA sends an association request message to the AP.

 S504: The AP establishes an association with the STA according to the relay indication information.

 5505. The AP broadcasts a channel measurement request frame for monitoring by a relay node of the entire network, and the relay nodes are associated with the AP.

 It should be noted that the relay node shown in FIG. 5 is one of the relay nodes that are associated with the AP in the entire network.

 5506. Each relay node broadcasts a channel measurement frame in a competitive manner for the STA to monitor.

 S507. The STA receives the channel measurement frame, and selects one of the associated relay nodes from the AP as the destination relay node according to the channel measurement frame.

 S508: The STA carries the identifier of the destination relay node in the first notification message and sends the identifier to the AP. . S509: The STA carries the identifier of the destination relay node in the first notification message and sends the identifier to the destination relay node.

 S508 and S509 can be executed simultaneously.

 FIG. 6 is a schematic diagram of a signaling flow of another embodiment of a method for selecting a relay node according to the present invention. As shown in FIG. 6, the method includes:

 S601. The relay node sends the relay indication information to the AP.

 S602. The AP establishes an association with the relay node according to the relay indication information.

 S603: The STA sends an association request message to the AP.

 S604: The AP establishes an association with the STA according to the association request message.

 5605. The AP uses the relay node associated with the AP in the BSS to which the AP belongs as the candidate relay node, and notifies the STA.

 In this embodiment, the number of the candidate relay nodes may be multiple, and each of the candidate relay nodes may broadcast a channel measurement frame for the STA to monitor.

 It should be noted that the relay node shown in FIG. 6 is a candidate relay node.

 S606. The STA broadcasts a channel measurement request frame for the above-mentioned candidate relay node to monitor.

S607. The foregoing candidate relay node broadcasts a channel measurement frame in a competitive manner for the STA to monitor. S608: The STA receives the channel measurement frame, and selects one of the candidate relay nodes as the destination relay node according to the channel measurement frame.

 S609: The STA carries the identifier of the destination relay node in the first notification message and sends the identifier to the AP.

5610. The STA carries the identifier of the destination relay node in the first notification message and sends the identifier to the destination relay node.

 Among them, S609 and S610 can be executed simultaneously.

 FIG. 7 is a schematic diagram of a signaling flow of another embodiment of a method for selecting a relay node according to the present invention. As shown in FIG. 7, the method includes:

 S701. The relay node sends the relay indication information to the AP.

 S702. The AP establishes an association with the relay node according to the relay indication information.

 S703: The STA sends an association request message to the AP.

 S704: The AP establishes an association with the STA according to the association request message.

 5705. The AP measures location information of the STA.

 S706. The AP selects a relay node that is closest to the STA as the destination relay node according to the location information.

 S707: The AP carries the identifier of the destination relay node in the second notification message and sends the identifier to the STA.

 S708. The AP carries the identifier of the destination relay node in the second notification message and sends the identifier to the STA.

 Among them, S707 and S708 can be executed simultaneously.

 In this embodiment, the AP is associated with the relay node and the STA, and the destination relay node corresponding to the STA selected by the STA or the AP is determined, and the destination relay node communicates with the STA by using the destination, A relay mechanism is added between the AP and the STA, thereby solving the problem that when the WLAN coverage is large, the throughput is greatly reduced and the communication reliability is low, thereby effectively improving the throughput of the system.

 FIG. 8 is a schematic structural diagram of an access point according to an embodiment of the present invention. As shown in FIG. 8, the access point 800 includes: a receiving module 801 and a determining module 802, where:

 The receiving module 801 is configured to receive the relay indication information sent by the relay node, and establish an association with the relay node according to the relay indication information.

Further, the receiving module 801 is further configured to receive an association request message sent by the STA, and Establishing an association with the STA according to the association request message;

 The determining module 802 is configured to determine, in the relay node that establishes the association, a destination relay node corresponding to the STA, to communicate with the STA by using the destination relay node.

 For the specific operations of the above modules, reference may be made to the method embodiment shown in FIG. 1 , and details are not described herein again.

 In this embodiment, the AP is associated with the relay node and the STA, respectively, and is determined by the

The destination relay node corresponding to the STA selected by the STA or the AP communicates with the STA by using the destination relay node, and the relay mechanism is added between the AP and the STA, thereby solving the problem that when the WLAN coverage is large, The throughput is greatly reduced and the communication reliability is low, thereby effectively increasing the throughput of the system.

 FIG. 9 is a schematic structural diagram of another embodiment of an access point according to the present invention. As shown in FIG. 9, on the basis of FIG. 8, the determining module 802 in the access point 800 includes: a determining unit 901 and a sending unit 902. , specifically,

 Corresponding to the first mode in the method embodiment shown in FIG. 1 , the acquiring unit 901 is configured to: the AP queries the STA and the mapping relationship of the associated relay node, and determines a candidate relay node corresponding to the STA;

 a sending unit 902, configured to send a channel measurement request frame to the candidate relay node, where the candidate relay node broadcasts a channel measurement frame, so that the STA, according to the received channel measurement frame, Selecting one of the candidate relay nodes as the destination relay node;

 Further, the determining unit 901 is further configured to: when the receiving module 801 receives the first notification message that is sent by the STA and carries the identifier of the destination relay node, according to the identifier of the destination relay node. Obtaining a destination relay node corresponding to the STA.

 In addition, corresponding to the third mode in the method embodiment shown in FIG. 1, the determining unit 901 is configured to use, as the candidate relay node, a relay node associated with the AP in the BSS to which the AP belongs.

 The sending unit 902 is configured to send the identifier of the to-be-selected relay node to the STA, where the STA sends a channel measurement request frame to the candidate relay node according to the identifier of the candidate relay node, and Determining, according to the received channel measurement frame, a relay node from the candidate relay node as a destination relay node; the channel measurement frame is a channel measurement frame broadcast by the candidate relay node;

Further, the determining unit 901 is further configured to send, by the STA, received by the receiving module. When the first notification message carrying the identifier of the destination relay node carries, the destination relay node corresponding to the STA is obtained according to the identifier of the destination relay node.

 FIG. 10 is a schematic structural diagram of another embodiment of an access point according to the present invention. As shown in FIG. 10, on the basis of FIG. 8, the access point 800 further includes: a broadcast module 803, specifically,

 Corresponding to the second mode in the method embodiment shown in Figure 1, the broadcast module 803 is configured to broadcast a channel measurement request frame, so that the relay node associated with the AP in the entire network according to the received channel Measure a request frame, and broadcast a channel measurement frame, so that the STA selects one relay node from the relay nodes that are associated with the AP in the entire network according to the received channel measurement frame, as a destination Following node

 The determining module 802 is specifically configured to: when the receiving module receives the first notification message that is sent by the STA and carries the identifier of the destination relay node, obtain, according to the identifier of the destination relay node, The destination relay node corresponding to the STA.

 FIG. 11 is a schematic structural diagram of another embodiment of an access point according to the present invention. As shown in FIG. 11, on the basis of FIG. 8, the access point further includes: a sending module 804, and in addition, the access point 800 The determining module 802 includes: a measuring unit 111 and a determining unit 112, specifically,

 Corresponding to the fourth mode in the method embodiment shown in FIG. 1 , the measuring unit 111 is configured to measure location information of the STA;

 a determining unit 112, configured to determine, according to the location information, a destination relay node corresponding to the STA in the relay node that establishes the association, where a distance between the destination relay node corresponding to the STA and the STA is less than The distance between other relay nodes and the STA;

 The sending module 804 is configured to carry the identifier of the destination relay node in the second notification message and send the identifier to the STA and the destination relay node.

 For the specific operations of the above modules, reference may be made to the method embodiment shown in FIG. 1 , and details are not described herein again.

 FIG. 12 is a schematic structural diagram of a site according to an embodiment of the present invention. As shown in FIG. 12, the site 120 includes: a sending module 121 and a determining module 122, where:

 The sending module 121 is configured to send an association request message to the AP, where the AP establishes an association with the STA according to the association request message.

 The determining module 122 is configured to determine a destination relay node corresponding to the STA, and communicate with the AP according to the destination relay node, where the destination relay node is associated with the AP.

In this embodiment, the AP associates with the relay node and the STA, respectively, and obtains the The destination relay node corresponding to the STA selected by the STA or the AP communicates with the STA by using the destination relay node, and the relay mechanism is added between the AP and the STA, thereby solving the problem that when the WLAN coverage is large, The throughput is greatly reduced and the communication reliability is low, thereby effectively increasing the throughput of the system.

 FIG. 13 is a schematic structural diagram of another embodiment of a site according to the present invention. As shown in FIG. 13, on the basis of FIG. 12, the site 120 further includes: a receiving module 123, specifically,

 Corresponding to the method embodiment shown in FIG. 2, the determining module 122 is configured to acquire a destination relay node corresponding to the STA, and has three implementation manners:

 1) The first mode, the receiving module 123 receives the channel measurement frame broadcast by the candidate relay node, and then the determining module 122 selects a relay node from the candidate relay node according to the channel measurement frame, as a purpose. Relay node

 The sending module 121 is further configured to carry the identifier of the destination relay node in the first notification message and send the identifier to the AP and the destination relay node.

 2) The second mode, the receiving module 123 is configured to receive, by the AP, an identifier of the candidate relay node that is sent by the AP.

 The determining module 122 sends a channel measurement request frame to the candidate relay node by using the sending module 121 according to the identifier of the candidate relay node, and receiving, by the receiving module 123, the candidate relay node according to the channel measurement request. And selecting, by the channel measurement frame, a relay node from the candidate relay node as the destination relay node according to the channel measurement frame;

 Further, in the same manner as the first manner, the sending module 121 is further configured to carry the identifier of the destination relay node in the first notification message and send the identifier to the AP and the destination relay node.

 The third mode, the receiving module 123 is further configured to receive a second notification message that is sent by the AP and that carries the identifier of the destination relay node.

 Then, the determining module 122 uses, as the destination relay node, the relay node corresponding to the identifier of the destination relay node according to the second notification message.

 For the specific operations of the above modules, reference may be made to the method embodiment shown in FIG. 2, and details are not described herein again.

 FIG. 14 is a schematic structural diagram of a relay node according to an embodiment of the present invention. As shown in FIG. 14, the relay node includes: a sending module 141 and a receiving module 142, where:

The sending module 141 is configured to send the relay indication information to the AP, where the AP establishes an association with the relay node according to the relay indication information. The receiving module 142 is configured to receive a channel measurement request frame.

 Further, the sending module 141 broadcasts a channel measurement frame according to the channel measurement request frame, for the STA that listens to the channel measurement frame, according to the channel measurement frame, from the broadcast channel measurement frame, and the AP One of the relay nodes that establish the association is selected as the destination relay node corresponding to the STA.

 In this embodiment, the AP is associated with the relay node and the STA, and the destination relay node corresponding to the STA selected by the STA or the AP is obtained, and the destination relay node communicates with the STA by using the destination. A relay mechanism is added between the AP and the STA, thereby solving the problem that when the WLAN coverage is large, the throughput is greatly reduced and the communication reliability is low, thereby effectively improving the throughput of the system.

 Further, in another embodiment of the present invention, the receiving module 142 is specifically configured to receive a channel measurement request frame sent by the AP or the STA.

 Further, if the relay node is used as the destination relay node, the receiving module 112 is further configured to receive a first notification message that is sent by the STA and that carries the identifier of the destination relay node, or receive A second notification message sent by the AP carrying the identifier of the destination relay node.

 For the operation of the above modules, reference may be made to the method embodiment shown in FIG. 3, and details are not described herein again.

 FIG. 15 is a schematic structural diagram of another embodiment of an access point according to the present invention. As shown in FIG. 15, the access point 150 includes: a memory 151, a receiver 152, a processor 153, and a transmitter 154, where 151. The receiver 152, the processor 153 and the transmitter 154 are connected by a bus 155, specifically:

 The memory 151 is for storing a command instructing the processor 153 to perform an operation;

 The receiver 152 is configured to receive the relay indication information sent by the relay node, and establish an association with the relay node according to the relay indication information, and is further configured to receive an association request message sent by the station STA, according to the An association request message is associated with the STA;

 The processor 153 is configured to determine, in the relay node that establishes the association, a destination relay node corresponding to the STA, to communicate with the STA by using the destination relay node.

 Specifically, the AP determines the destination relay node corresponding to the STA in the established relay node, and may have the following four implementation manners:

(1) In the first mode, the processor 153 is configured to: the AP queries the mapping relationship between the STA and the associated relay node, and determines a candidate relay node corresponding to the STA; a transmitter 154, configured to send a channel measurement request frame to the candidate relay node, where the candidate relay node broadcasts a channel measurement frame, so that the STA according to the received channel measurement frame, Selecting one of the candidate relay nodes as the destination relay node;

 The processor 153 is further configured to: when the receiving module receives the first notification message that is sent by the STA and carries the identifier of the destination relay node, determine, according to the identifier of the destination relay node, The destination relay node corresponding to the STA.

 (2) In the second mode, the transmitter 154 is configured to broadcast a channel measurement request frame, so that the relay node associated with the AP in the entire network according to the received channel measurement request frame, and the broadcast channel measurement a frame, so that the STA selects one relay node as a destination relay node from the relay nodes that are associated with the AP in the entire network according to the received channel measurement frame; the processor 153, Specifically, when the receiving module receives the first notification message that is sent by the STA and carries the identifier of the destination relay node, determining, according to the identifier of the destination relay node, a destination corresponding to the STA Relay node.

 (3) In the third mode, the processor 153 is configured to use, as the candidate relay node, a relay node that is associated with the AP in the BSS to which the AP belongs.

 a transmitter 154, configured to send, to the STA, an identifier of the to-be-selected relay node, to send, by the STA, a channel measurement request frame to the candidate relay node according to the identifier of the candidate relay node, and Determining, according to the received channel measurement frame, a relay node from the candidate relay node as a destination relay node; the channel measurement frame is a channel measurement frame broadcast by the candidate relay node;

 The processor 153 is further configured to: when the first notification message that is sent by the STA and that carries the identifier of the destination relay node, is received by the receiving module, determine, according to the identifier of the destination relay node, The destination relay node corresponding to the STA.

 (4) In the fourth mode, the processor 153 is configured to measure location information of the STA, and is further configured to determine, according to the location information, a destination corresponding to the STA in the relay node that establishes association a relay node, where a distance between the destination relay node corresponding to the STA and the STA is smaller than a distance between the other relay node and the STA;

 The transmitter 154 is configured to carry the identifier of the destination relay node in the second notification message and send the identifier to the STA and the destination relay node.

FIG. 16 is a schematic structural diagram of another site according to an embodiment of the present invention, as shown in FIG. The station 160 includes: a memory 161, a receiver 162, a processor 163, and a transmitter 164, wherein the memory 161, the receiver 162, the processor 163, and the transmitter 164 are connected by a bus 165, specifically:

 The memory 161 is for storing a command instructing the processor 163 to perform an operation;

 The sender 164 is configured to send an association request message to the access point AP, where the AP establishes an association with the STA according to the association request message.

 The processor 163 is configured to determine a destination relay node corresponding to the STA, and communicate with the AP according to the destination relay node, where the destination relay node is associated with the AP.

 Further, the receiver 162 is configured to receive a channel measurement frame that is broadcast by the to-be-selected relay node, where the processor 163 is configured to select a relay node from the candidate relay node according to the channel measurement frame, as The destination relay node is further configured to carry the identifier of the destination relay node in the first notification message and send the identifier to the AP and the destination relay node.

 The receiver 162 is configured to receive an identifier of the to-be-selected relay node that is sent by the AP, where the processor 163 is configured to send, by using the sending module, a channel measurement to the to-be-selected relay node according to the identifier of the to-be-selected relay node. Requesting a frame; and when the receiving module receives the channel measurement frame sent by the candidate relay node according to the channel measurement request frame, selecting a relay from the candidate relay node according to the channel measurement frame The node is used as the destination relay node. The sender 164 is further configured to carry the identifier of the destination relay node in the first notification message and send the identifier to the AP and the destination relay node.

 The receiver 162 is configured to receive a second notification message that is sent by the AP and that carries the identifier of the destination relay node. The processor 163 is configured to: determine, according to the second notification message, the identifier of the destination relay node. The corresponding relay node serves as the destination relay node.

 FIG. 17 is a schematic structural diagram of another embodiment of a relay node according to the present invention. As shown in FIG. 17, the relay node 170 includes: a receiver 171 and a transmitter 172, where:

 The transmitter 172 is configured to send the relay indication information to the AP, where the AP establishes an association with the relay node according to the relay indication information.

 a receiver 171, configured to receive a channel measurement request frame;

The transmitter 172 is further configured to: according to the channel measurement request frame, broadcast a channel measurement frame, to listen to the STA that sends the channel measurement frame, according to the channel measurement frame, from a relay node that broadcasts the channel measurement frame Selecting a relay node as the destination relay section corresponding to the STA Point, wherein the destination relay node is associated with the AP.

 Further, the receiver 171 is specifically configured to receive a channel measurement request frame sent by the AP or the STA.

 The receiver 171 is further configured to receive a first notification message that is sent by the STA and that carries the identifier of the destination relay node, or a second notification message that is sent by the AP and that carries the identifier of the destination relay node.

 One of ordinary skill in the art will appreciate that all or a portion of the steps to implement the various method embodiments described above can be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

 Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims 1. A relay node selection method, characterized by including: The access point AP receives the relay indication information sent by the relay node, and establishes an association with the relay node based on the relay indication information; The AP receives the association request message sent by the station STA, and establishes an association with the STA according to the association request message; The AP determines a destination relay node corresponding to the STA among the associated relay nodes, so as to communicate with the STA through the destination relay node. 2. The method according to claim 1, wherein the AP determines the destination relay node corresponding to the STA among the associated relay nodes, including: The AP queries the mapping relationship between the STA and the associated relay node, determines the candidate relay node corresponding to the STA, and sends a channel measurement request frame to the candidate relay node for the candidate to be selected. The relay node broadcasts a channel measurement frame, so that the STA selects a relay node from the candidate relay nodes as the destination relay node according to the received channel measurement frame; the AP receives the message sent by the STA the first notification message carrying the identifier of the destination relay node, and determine the destination relay node corresponding to the STA based on the identifier of the destination relay node 3. The method according to claim 1, wherein the AP determines the destination relay node corresponding to the STA among the associated relay nodes, including: The AP broadcasts a channel measurement request frame, so that the relay nodes associated with the AP in the entire network can broadcast a channel measurement frame based on the received channel measurement request frame, so that the STA can broadcast a channel measurement frame based on the received channel measurement request frame. In the channel measurement frame, select a relay node from the relay nodes associated with the AP in the entire network as a destination relay node; The AP receives the first notification message sent by the STA and carries the identity of the destination relay node, and determines the destination relay node corresponding to the STA based on the identity of the destination relay node. 4. The method according to claim 1, wherein the AP determines the destination relay node corresponding to the STA among the associated relay nodes, including: The AP uses the relay node associated with the AP in the BSS to which the AP belongs as a candidate relay node, and sends the identification of the candidate relay node to the STA for use by the STA. According to the identification of the candidate relay node, a channel measurement request frame is sent to the candidate relay node, and according to the received channel measurement frame, a relay node is selected from the candidate relay node as the destination relay. Node; The channel measurement frame is a channel measurement frame broadcast by the candidate relay node; The AP receives the first notification message sent by the STA and carries the identity of the destination relay node, and performs the measurement according to the purpose The identification of the relay node determines the destination relay node corresponding to the STA. 5. The method according to claim 1, wherein the AP determines the destination relay node corresponding to the STA among the associated relay nodes, including: The AP measures the location information of the STA; The AP determines, based on the location information, the relay node associated with the The destination relay node corresponding to the STA, the distance between the destination relay node corresponding to the STA and the STA is smaller than the distance between other relay nodes and the STA; The method also includes: The AP carries the identity of the destination relay node in a second notification message and sends it to the STA and the destination relay node. 6. A relay node selection method, characterized by including: The station STA sends an association request message to the access point AP, so that the AP can establish association with the STA according to the association request message; The STA determines a destination relay node corresponding to the STA, and communicates with the AP according to the destination relay node, where the destination relay node is associated with the AP. 7. The method according to claim 6, wherein the STA determines the destination relay node corresponding to the STA, including: The STA receives the channel measurement frame broadcast by the candidate relay node, and selects a relay node from the candidate relay node as the destination relay node according to the channel measurement frame; The method also includes: The STA carries the identity of the destination relay node in a first notification message and sends it to the AP and the destination relay node. 8. The method according to claim 6, wherein the STA determines the destination relay node corresponding to the STA, including: The STA receives the identification of the candidate relay node sent by the AP; and according to the candidate relay node The identification of the point, sending a channel measurement request frame to the candidate relay node; The STA receives a channel measurement frame sent by the candidate relay node according to the channel measurement request frame, and selects a relay node from the candidate relay nodes as a destination relay node based on the channel measurement frame. ; The method also includes: The STA carries the identity of the destination relay node in a first notification message and sends it to the AP and the destination relay node. 9. The method according to claim 6, wherein the STA determines the destination relay node corresponding to the STA, including: The STA receives the second notification message carrying the identity of the destination relay node sent by the AP. 10. A relay node selection method, characterized by including: The relay node sends relay indication information to the AP, so that the AP establishes association with the relay node based on the relay indication information; The relay node receives the channel measurement request frame, and broadcasts the channel measurement frame according to the channel measurement request frame, so that the STA that sends the channel measurement frame can be monitored, and broadcasts the channel measurement frame according to the channel measurement frame. Select one relay node among the relay nodes associated with the AP as the destination relay node corresponding to the STA. 11. The method according to claim 10, characterized in that the relay node receives a channel measurement request frame, including: The relay node receives the channel measurement request frame sent by the AP or STA. 12. The method according to claim 10, further comprising: If the relay node is used as the destination relay node, receive the first notification message sent by the STA carrying the identifier of the destination relay node, or receive the first notification message sent by the AP carrying the identifier of the destination relay node. The identification of the second notification message. 13. An access point, characterized by: including: A receiving module, configured to receive the relay indication information sent by the relay node, and establish an association with the relay node according to the relay indication information; The receiving module is also configured to receive an association request message sent by the site STA, and establish an association with the STA according to the association request message; A determining module, configured to determine a destination relay node corresponding to the STA among the associated relay nodes, so as to communicate with the STA through the destination relay node. 14. The access point according to claim 13, characterized in that the determination module includes: a determination unit, used by AP to query the STA and establish the mapping relationship of the associated relay node, and determine the mapping relationship corresponding to the STA The candidate relay node; A sending unit, configured to send a channel measurement request frame to the candidate relay node, so that the candidate relay node broadcasts the channel measurement frame, so that the STA receives the channel measurement frame from the candidate relay node. Select a relay node among the selected relay nodes as the destination relay node; The determining unit is also configured to determine, based on the identity of the destination relay node, the first notification message sent by the STA and carrying the identity of the destination relay node when the receiving module receives the first notification message sent by the STA. The destination relay node corresponding to the STA. 15. The access point according to claim 13, further comprising: A broadcast module, configured to broadcast a channel measurement request frame, so that the relay nodes associated with the AP in the entire network can broadcast a channel measurement frame according to the received channel measurement request frame, so that the STA can broadcast a channel measurement frame according to the received channel measurement request frame. For the channel measurement frame, select a relay node from the relay nodes associated with the AP in the entire network as the destination relay node; The determining module is specifically configured to determine, based on the identification of the destination relay node, the first notification message sent by the STA and carrying the identification of the destination relay node when the receiving module receives the first notification message sent by the STA. The destination relay node corresponding to the above STA. 16. The access point according to claim 13, characterized in that the determination module includes: a determination unit, configured to select the relay node associated with the AP in the BSS to which the AP belongs as a candidate successor node; A sending unit, configured to send the identification of the candidate relay node to the STA, so that the STA can send a channel measurement request frame to the candidate relay node according to the identification of the candidate relay node, and according to The received channel measurement frame selects a relay node from the candidate relay nodes as the destination relay node; the channel measurement frame is a channel measurement frame broadcast by the candidate relay node; the determination unit, It is also configured to determine, based on the identity of the destination relay node, the first notification message sent by the STA carrying the identity of the destination relay node when the receiving module receives the first notification message corresponding to the STA. destination relay node. 17. The access point according to claim 13, characterized in that the determining module includes: A measurement unit, used to measure the location information of the STA; Determining unit, configured to determine a destination relay node corresponding to the STA among the associated relay nodes according to the location information, and the distance between the destination relay node corresponding to the STA and the STA is smaller than other The distance between the relay node and the STA; The access point also includes: A sending module, configured to carry the identity of the destination relay node in the second notification message and send it to the STA and the destination relay node. 18. A site, characterized by: including: A sending module, configured to send an association request message to the access point AP, so that the AP can establish association with the STA according to the association request message; Determining module, configured to determine the destination relay node corresponding to the STA, and communicate with the AP according to the destination relay node, where the destination relay node is associated with the AP. 19. The site according to claim 18, further comprising: The receiving module is used to receive the channel measurement frame broadcast by the candidate relay node; Then the determination module is specifically configured to select a relay node from the candidate relay nodes as the destination relay node according to the channel measurement frame; The sending module is also configured to carry the identity of the destination relay node in the first notification message and send it to the AP and the destination relay node. 20. The site according to claim 18, characterized in that the receiving module is used to receive the identification of the candidate relay node sent by the AP; The determining module is specifically configured to send a channel measurement request frame to the candidate relay node through the sending module according to the identification of the candidate relay node; and receive the candidate relay node in the receiving module. When the channel measurement frame is sent according to the channel measurement request frame, according to the channel measurement frame, select a relay node from the candidate relay nodes as the destination relay node; the sending module is also used to send the selected relay node. The identity of the destination relay node is carried in the first notification message and sent to the AP and the destination relay node. 21. The site according to claim 18, characterized in that, The receiving module is also configured to receive a second notification message sent by the AP carrying the identification of the destination relay node; Then the determining module is specifically configured to determine the destination relay node according to the second notification message. The relay node corresponding to the identifier is used as the destination relay node. 22. A relay node, characterized by: including: A sending module, configured to send relay indication information to the AP, so that the AP can establish association with the relay node based on the relay indication information; A receiving module, used to receive channel measurement request frames; The sending module is also configured to broadcast a channel measurement frame according to the channel measurement request frame, so as to monitor the STA that sends the channel measurement frame, and according to the channel measurement frame, broadcast the channel measurement frame from, and with the Select one relay node among the relay nodes associated with the AP as the destination relay node corresponding to the STA. 23. The relay node according to claim 22, characterized in that the receiving module is specifically configured to receive a channel measurement request frame sent by the AP or STA. 24. The relay node according to claim 22, characterized in that, The receiving module is also configured to receive a first notification message sent by the STA carrying the identifier of the destination relay node, or receive a second notification message sent by the AP carrying the identifier of the destination relay node.