Patent Publication Number: US-2018042046-A1

Title: Pseudo access method, direct connection scheduling method for pseudo access, station, and access point

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a national stage of International Application No. PCT/CN2015/073683, filed on Mar. 5, 2015, which is hereby incorporated by reference in its entirety. 
    
    
     TECHNICAL FIELD 
     The present invention relates to the communications field, and in particular, to a pseudo access method, a direct connection scheduling method for pseudo access, a station, and an access point. 
     BACKGROUND 
     Direct communication means that two STAs (Station, station) (for example, user terminals) are associated with a same AP (Access Point, access point), but when the two STAs communicate with each other, a packet is directly sent to each other by using an air interface without being forwarded by the AP. As shown in  FIG. 1 , when a STA  1  sends a message to a STA  2  by using an AP, a channel needs to be occupied twice, that is, once at uplink and once at downlink. However, a channel needs to be occupied only once when a direct link is used. In this way, utilization of a radio channel can be improved, and an attainable effective system throughput of a BSS (Basic Service Set, basic service set, that is, a wireless local area network centering on an AP) controlled by the AP can be improved. 
     In an existing standard, a direct link may work on a working channel, that is, a fundamental channel, of an AP or may work on a channel, that is, a non-fundamental channel, different from the working channel of the AP. When the direct link works on the fundamental channel, and data is transmitted on a direct link of the AP, a channel resource still needs to be requested from the AP. That is, when data is transmitted on the direct link, other STAs in a BSS (Basic Service Set, basic service set, that is, a wireless local area network centering on the AP) controlled by the AP and the AP cannot use a working channel that is being occupied. When the direct link works on the non-fundamental channel, the direct link does not occupy a resource of the working channel of the AP. Therefore, data transmission on another link in the BSS is not affected, but a STA on the direct link may content for a channel resource with another BSS. 
     With development of the IEEE802.11 technology, a working channel of an AP becomes increasingly broad, but a quantity of channels into which a limited radio spectrum may be divided is increasingly small. Consequently, when the AP works on a very broad radio channel, it becomes difficult for a STA to select a non-fundamental channel as a working channel of a direct link. Therefore, a main consideration is that the direct link still needs to work on a fundamental channel. 
     A WiFi network (that is, a network running the IEEE802.11 standard) runs in a free radio spectrum, and mainly uses a contention mechanism. The newest IEEE 802.11ax standard that is being formulated strives to improve efficiency of the WiFi network, and further improve a system throughput. In some dense user scenarios, use of a direct connection technology remarkably improves the system throughput, but in an existing standard, a STA on a direct link voluntarily contends for a channel. 
     In addition, in actual application, generally, two STAs may be directly connected to perform communication without being associated to one AP, for example, maybe directly connected by using an ad hoc mode (ad hoc) defined in the IEEE802.11, or may be connected by using a P2P connection mode defined by the WFA (Wi-Fi Alliance, WiFi Alliance). A brand name of the P2P mode defined by the WFA is WiFi Direct. WiFi Direct is a mode in which multiple STAs are interconnected, where one STA plays a role similar to a group owner (Group Owner) of an AP, and another STA plays a role of a client, but most common P2P application is a connection of two STAs, for example, smartphones. In the present invention, a manner in which two STAs are directly connected without an infrastructure AP is collectively referred to as a P2P connection, to distinguish from a direct connection of two STAs of one AP. 
     However, in a dense scenario, many STAs may be connected to an AP to perform an Internet service, and many STAs may perform P2P communication at the same time. The STAs may contend for a same spectrum resource. Consequently, channel use efficiency is low. 
     SUMMARY 
     Embodiments of the present invention provide a pseudo access method, a direct connection scheduling method for pseudo access, a station, and an access point, so as to improve channel use efficiency for communication between STAs in a dense scenario. 
     A first aspect of the embodiments of the present invention provides a pseudo access method, including: 
     finding, by a station STA, an access point AP supporting pseudo access, where the STA is not an authorized user of the AP, and the pseudo access is used for enabling an unauthorized user that accesses the AP to send a scheduling-related management frame to the AP and accept scheduling management by the AP; 
     sending, by the STA, pseudo access information to the AP, where the pseudo access information is used by the AP to determine that access initiated by the STA is pseudo access; and 
     establishing, by the STA, a pseudo access association with the AP, so that the STA can send a scheduling-related management frame to the AP and accept scheduling management by the AP. 
     With reference to the first aspect of the embodiments of the present invention, in a first implementation manner of the first aspect of the embodiments of the present invention, the sending, by the STA, pseudo access information to the AP specifically includes: 
     sending, by the STA, a pseudo access association request message to the AP, where the pseudo association request message is used for initiating a pseudo access association request to the AP, and includes an information indication indicating the pseudo access information; and 
     before the step of establishing, by the STA, a pseudo access association with the AP, the method further includes: 
     receiving, by the STA, a pseudo access association response message sent by the AP, where the pseudo access association response message is a response to the pseudo access association request message, and is used for determining that the AP accepts the pseudo access association request sent by the STA. 
     With reference to the first aspect of the embodiments of the present invention, in a second implementation manner of the first aspect of the embodiments of the present invention, the sending, by the STA, pseudo access information to the AP specifically includes: 
     sending, by the STA, a pseudo access authentication request message to the AP, where the pseudo access authentication request message is used for initiating a pseudo access authentication request to the AP, and includes an authentication type parameter indicating the pseudo access information; and 
     before the step of establishing, by the STA, a pseudo access association with the AP, the method further includes: 
     receiving, by the STA, a pseudo access authentication response message sent by the AP, where the pseudo access authentication response message is a response to the pseudo access authentication request message, and is used for determining that the AP accepts the pseudo access authentication request sent by the SAT. 
     With reference to any one of the first aspect to the second implementation manner of the first aspect of the embodiments of the present invention, in a third implementation manner of the first aspect of the embodiments of the present invention, the finding, by a STA, an AP supporting pseudo access specifically includes: 
     listening, by the STA, for a broadcast frame that is sent by an AP and that can be received; and 
     if a broadcast frame that is sent by a first AP and that is obtained by listening indicates that the first AP supports pseudo access, determining, by the STA, that the first AP is the AP supporting pseudo access. 
     With reference to any one of the first aspect to the second implementation manner of the first aspect of the embodiments of the present invention, in a fourth implementation manner of the first aspect of the embodiments of the present invention, the finding, by a STA, an AP supporting pseudo access specifically includes: 
     sending, by the STA, a probe request frame including information indicating that an AP supporting pseudo access is searched for; and 
     receiving, by the STA, a probe response frame sent by a second AP, where the probe response frame indicates that the second AP is the AP supporting pseudo access. 
     A second aspect of the embodiments of the present invention provides a pseudo access method, including: 
     receiving, by an AP, pseudo access information sent by a STA, where the pseudo access information is used for enabling the AP to determine that access initiated by the STA is pseudo access, the STA is not an authorized user of the AP, the AP supports pseudo access, and the pseudo access is used for enabling an unauthorized user that accesses the AP to send a scheduling-related management frame to the AP and accept scheduling management by the AP; and 
     establishing, by the AP, a pseudo access association with the STA, so that the AP can receive a scheduling-related management frame sent by the STA and perform scheduling management on the STA. 
     With reference to the second aspect of the embodiments of the present invention, in a first implementation manner of the second aspect of the embodiments of the present invention, the receiving, by an AP, pseudo access information sent by a STA specifically includes: 
     receiving, by the AP, a pseudo access association request message sent by the STA, where the pseudo association request message is used for initiating a pseudo access association request to the AP, and includes an information indication indicating the pseudo access information; and 
     before the step of establishing, by the AP, a pseudo access association with the STA, the method further includes: 
     sending, by the AP, a pseudo access association response message to the STA, where the pseudo access association response message is a response to the pseudo access association request message, and is used for determining that the AP accepts the pseudo access association request sent by the STA. 
     With reference to the second aspect of the embodiments of the present invention, in a second implementation manner of the second aspect of the embodiments of the present invention, the receiving, by an AP, pseudo access information sent by a STA specifically includes: 
     receiving, by the AP, a pseudo access authentication request message sent by the STA, where the pseudo access authentication request message is used for initiating a pseudo access authentication request to the AP, and includes an authentication type parameter indicating the pseudo access information; and 
     before the step of establishing, by the AP, a pseudo access association with the STA, the method further includes: 
     sending, by the AP, a pseudo access authentication response message to the STA, where the pseudo access authentication response message is a response to the pseudo access authentication request message, and is used for determining that the AP accepts the pseudo access authentication request sent by the SAT. 
     With reference to any one of the second aspect to the second implementation manner of the second aspect of the embodiments of the present invention, in a third implementation manner of the second aspect of the embodiments of the present invention, before the step of receiving, by an AP, pseudo access information sent by a STA, the method further includes: 
     sending, by the AP, a broadcast frame, and indicating, in the broadcast frame, that the AP supports pseudo access. 
     With reference to any one of the second aspect to the second implementation manner of the second aspect of the embodiments of the present invention, in a fourth implementation manner of the second aspect of the embodiments of the present invention, before the step of receiving, by an AP, pseudo access information sent by a STA, the method further includes: 
     receiving, by the AP, a probe request frame sent by the STA, where the probe request frame carries information indicating that an AP supporting pseudo access is searched for; and 
     sending, by the AP, a probe response frame to the STA, where the probe response frame indicates that the AP supports pseudo access. 
     A third aspect of the embodiments of the present invention provides a direct connection scheduling method for pseudo access, including: 
     establishing, by a first STA, a P2P connection to a second STA; 
     establishing, by the first STA and the second STA, a pseudo access association with a same AP supporting pseudo access, where the first STA and the second STA are not authorized users of the AP; 
     establishing, by the first STA, a direct connection to the second STA by using the AP; and 
     accepting, by the first STA and the second STA, direct connection scheduling by the AP. 
     With reference to the third aspect of the embodiments of the present invention, in a first implementation manner of the third aspect of the embodiments of the present invention, the establishing, by the first STA and the second STA, a pseudo access association with a same AP supporting pseudo access specifically includes: 
     finding, by the first STA, the AP supporting pseudo access; 
     notifying, by the first STA, the second STA of an identifier of the found AP by using the P 2 P connection; and 
     establishing, by both the first STA and the second STA, a pseudo access association with the AP. 
     With reference to the third aspect or the first implementation manner of the third aspect of the embodiments of the present invention, in a second implementation manner of the third aspect of the embodiments of the present invention, the establishing, by the first STA, a direct connection to the second STA by using the AP specifically includes: 
     initiating, by the first STA, a direct connection request to the AP, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA; and 
     receiving, by the first STA, a direct connection response returned by the AP, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
     With reference to the third aspect of the embodiments of the present invention, in a third implementation manner of the third aspect of the embodiments of the present invention, the accepting, by the first STA and the second STA, direct connection scheduling by the AP specifically includes: 
     requesting, by the first STA, a direct connection transport stream from the AP, to notify the AP of a resource requirement of direct communication between the first STA and the second STA; and 
     performing, by the first STA, direct communication with the second STA on a direct connection transport stream allocated by the AP. 
     With reference to the third implementation manner of the third aspect of the embodiments of the present invention, in a fourth implementation manner of the third aspect of the embodiments of the present invention, the method further includes: 
     when the first STA performs direct communication with the second STA on the direct connection transport stream, providing protection by using a key of the P2P connection. 
     A fourth aspect of the embodiments of the present invention provides a direct connection scheduling method for pseudo access, including: 
     establishing, by an AP, a pseudo access association with each of a first STA and a second STA, where the AP supports pseudo access, the first STA and the second STA are not authorized users of the AP, and a P2P connection is already established between the first STA and the second STA; 
     establishing, by the AP, a direct connection between the first STA and the second STA; and performing, by the AP, direct connection scheduling on the first STA and the second STA. 
     With reference to the fourth aspect of the embodiments of the present invention, in a first implementation manner of the fourth aspect of the embodiments of the present invention, the establishing, by the AP, a direct connection between the first STA and the second STA specifically includes: 
     receiving, by the AP, a direct connection request initiated by the first STA, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA; and 
     establishing, by the AP, a direct connection between the first STA and the second STA according to the direct connection request, and returning a direct connection response to the first STA, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
     With reference to the fourth aspect or the first implementation manner of the fourth aspect of the embodiments of the present invention, in a second implementation manner of the fourth aspect of the embodiments of the present invention, the performing, by the AP, direct connection scheduling on the first STA and the second STA specifically includes: 
     receiving, by the AP, a request of the first STA for a direct connection transport stream, to obtain a resource requirement of direct communication between the first STA and the second STA; and 
     allocating, by the AP, a direct connection transport stream for the first STA to perform direct communication with the second STA. 
     A fifth aspect of the embodiments of the present invention provides a station STA, including: 
     a finding module, configured to find an access point AP supporting pseudo access, where the STA is not an authorized user of the AP, and the pseudo access is used for enabling an unauthorized user that accesses the AP to send a scheduling-related management frame to the AP and accept scheduling management by the AP; 
     a first sending module, configured to send pseudo access information to the AP, where the pseudo access information is used by the AP to determine that access initiated by the STA is pseudo access; and 
     a first establishment module, configured to establish a pseudo access association with the AP, so that the STA can send a scheduling-related management frame to the AP and accept scheduling management by the AP. 
     With reference to the fifth aspect of the embodiments of the present invention, in a first implementation manner of the fifth aspect of the embodiments of the present invention, the first sending module is specifically configured to send a pseudo access association request message to the AP, where the pseudo association request message is used for initiating a pseudo access association request to the AP, and includes an information indication indicating the pseudo access information; and 
     the STA further includes: 
     a first receiving module, configured to: before the pseudo access association is established with the AP, receive a pseudo access association response message sent by the AP, where the pseudo access association response message is a response to the pseudo access association request message, and is used for determining that the AP accepts the pseudo access association request sent by the STA. 
     With reference to the fifth aspect of the embodiments of the present invention, in a second implementation manner of the fifth aspect of the embodiments of the present invention, the first sending module is specifically configured to send a pseudo access authentication request message to the AP, where the pseudo access authentication request message is used for initiating a pseudo access authentication request to the AP, and includes an authentication type parameter indicating the pseudo access information; and 
     the STA further includes: 
     a second receiving module, configured to: before the pseudo access association is established with the AP, receive a pseudo access authentication response message sent by the AP, where the pseudo access authentication response message is a response to the pseudo access authentication request message, and is used for determining that the AP accepts the pseudo access authentication request sent by the SAT. 
     With reference to the fifth aspect to the second implementation manner of the fifth aspect of the embodiments of the present invention, in a third implementation manner of the fifth aspect of the embodiments of the present invention, the finding module specifically includes: 
     a listening unit, configured to listen for a broadcast frame that is sent by an AP and that can be received; and 
     a determining unit, configured to: when a broadcast frame that is sent by a first AP and that is obtained by the listening unit by listening indicates that the first AP supports pseudo access, determine that the first AP is the AP supporting pseudo access. 
     With reference to the fifth aspect to the second implementation manner of the fifth aspect of the embodiments of the present invention, in a fourth implementation manner of the fifth aspect of the embodiments of the present invention, the finding module specifically includes: 
     a probe sending unit, configured to: send a probe request frame, and add, to the probe request frame, information indicating that an AP supporting pseudo access is searched for; and 
     a response receiving unit, configured to receive a probe response frame sent by a second AP, where the probe response frame indicates that the second AP is the AP supporting pseudo access. 
     A sixth aspect of the embodiments of the present invention provides an access point AP, including: 
     a third receiving module, configured to receive pseudo access information sent by a STA, where the pseudo access information is used for enabling the AP to determine that access initiated by the STA is pseudo access, the STA is not an authorized user of the AP, the AP supports pseudo access, and the pseudo access is used for enabling an unauthorized user that accesses the AP to send a scheduling-related management frame to the AP and accept scheduling management by the AP; and 
     a second establishment module, configured to establish a pseudo access association with the STA, so that the AP can receive a scheduling-related management frame sent by the STA and perform scheduling management on the STA. 
     With reference to the sixth aspect of the embodiments of the present invention, in a first implementation manner of the sixth aspect of the embodiments of the present invention, the third receiving module is specifically configured to receive a pseudo access association request message sent by the STA, where the pseudo association request message is used for initiating a pseudo access association request to the AP, and includes an information indication indicating the pseudo access information; and 
     the AP further includes: 
     a second sending module, configured to: before the pseudo access association is established with the STA, send a pseudo access association response message to the STA, where the pseudo access association response message is a response to the pseudo access association request message, and is used for determining that the AP accepts the pseudo access association request sent by the STA. 
     With reference to the sixth aspect of the embodiments of the present invention, in a second implementation manner of the sixth aspect of the embodiments of the present invention, the third receiving module is specifically configured to receive a pseudo access authentication request message sent by the STA, where the pseudo access authentication request message is used for initiating a pseudo access authentication request to the AP, and includes an authentication type parameter indicating the pseudo access information; and 
     the AP further includes: 
     a third sending module, configured to: before the pseudo access association is established with the STA, send a pseudo access authentication response message to the STA, where the pseudo access authentication response message is a response to the pseudo access authentication request message, and is used for determining that the AP accepts the pseudo access authentication request sent by the SAT. 
     With reference to any one of the sixth aspect to the second implementation manner of the sixth aspect of the embodiments of the present invention, in a third implementation manner of the sixth aspect of the embodiments of the present invention, the AP further includes: 
     a fourth sending module, configured to: before the pseudo access information sent by the STA is received, send a broadcast frame, and indicate, in the broadcast frame, that the AP supports pseudo access. 
     With reference to any one of the sixth aspect to the second implementation manner of the sixth aspect of the embodiments of the present invention, in a fourth implementation manner of the sixth aspect of the embodiments of the present invention, the AP further includes: 
     a probe receiving module, configured to receive a probe request frame sent by the STA, where the probe request frame carries information indicating that an AP supporting pseudo access is searched for; and 
     a response sending module, configured to send a probe response frame to the STA, where the probe response frame indicates that the AP supports pseudo access. 
     A seventh aspect of the embodiments of the present invention provides a STA, used as a first STA, and including: 
     a third establishment module, configured to establish a P2P connection to a second STA; 
     a fourth establishment module, configured to establish a pseudo access association with an AP supporting pseudo access, wherein the AP is the same one as that the second STA has established or will establish a pseudo access association with, where the first STA and the second STA are not authorized users of the AP; 
     a fifth establishment module, configured to establish a direct connection to the second STA by using the AP; and 
     a scheduling acceptance module, configured to accept direct connection scheduling by the AP along with the second STA. 
     With reference to the seventh aspect of the embodiments of the present invention, in a first implementation manner of the seventh aspect of the embodiments of the present invention, the fourth establishment module specifically includes: 
     a finding unit, configured to find the AP supporting pseudo access; 
     a notification unit, configured to notify the second STA of an identifier of the found AP by using the P2P connection; and 
     an establishment unit, configured to establish, a pseudo access association with the AP, wherein the second STA has established or will establish a pseudo access association with the same AP. 
     With reference to the seventh aspect or the first implementation manner of the seventh aspect of the embodiments of the present invention, in a second implementation manner of the seventh aspect of the embodiments of the present invention, the fifth establishment module specifically includes: 
     a direct connection request initiation unit, configured to initiate a direct connection request to the AP, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA; and 
     a direct connection response receiving unit, configured to receive a direct connection response returned by the AP, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
     With reference to the seventh aspect of the embodiments of the present invention, in a third implementation manner of the seventh aspect of the embodiments of the present invention, the scheduling acceptance module specifically includes: 
     a transport stream request unit, configured to request a direct connection transport stream from the AP, to notify the AP of a resource requirement of direct communication between the first STA and the second STA; and 
     a communications unit, configured to perform direct communication with the second STA on a direct connection transport stream allocated by the AP. 
     With reference to the third implementation manner of the seventh aspect of the embodiments of the present invention, in a fourth implementation manner of the seventh aspect of the embodiments of the present invention, the communications unit is specifically configured to perform direct communication with the second STA on the direct connection transport stream allocated by the AP, and provide protection by using a key of the P2P connection. 
     An eighth aspect of the embodiments of the present invention provides an AP, including: 
     a sixth establishment module, configured to establish a pseudo access association with each of a first STA and a second STA, where the AP supports pseudo access, the first STA and the second STA are not authorized users of the AP, and a P2P connection is already established between the first STA and the second STA; 
     a seventh establishment module, configured to establish a direct connection between the first STA and the second STA; and 
     a scheduling module, configured to perform direct connection scheduling on the first STA and the second STA. 
     With reference to the eighth aspect of the embodiments of the present invention, in a first implementation manner of the eighth aspect of the embodiments of the present invention, the seventh establishment module specifically includes: 
     a direct connection request receiving unit, configured to receive a direct connection request initiated by the first STA, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA; and 
     a direct connection request response unit, configured to: establish a direct connection between the first STA and the second STA according to the direct connection request, and return a direct connection response to the first STA, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
     With reference to the eighth aspect or the first implementation manner of the eighth aspect of the embodiments of the present invention, in a second implementation manner of the eighth aspect of the embodiments of the present invention, the scheduling module specifically includes: 
     a transport stream request receiving unit, configured to receive a request of the first STA for a direct connection transport stream, to obtain a resource requirement of direct communication between the first STA and the second STA; and 
     a transport stream allocation unit, configured to allocate a direct connection transport stream for the first STA to perform direct communication with the second STA. 
     A ninth aspect of the embodiments of the present invention provides a STA, including: 
     an input apparatus, an output apparatus, a processor, and a memory, where 
     the processor is configured to perform the following steps by invoking an operation instruction stored in the memory: 
     finding an access point AP supporting pseudo access, where the STA is not an authorized user of the AP, and the pseudo access is used for enabling an unauthorized user that accesses the AP to send a scheduling-related management frame to the AP and accept scheduling management by the AP; 
     sending pseudo access information to the AP, where the pseudo access information is used by the AP to determine that access initiated by the STA is pseudo access; and 
     establishing a pseudo access association with the AP, so that the STA can send a scheduling-related management frame to the AP and accept scheduling management by the AP. 
     With reference to the ninth aspect of the embodiments of the present invention, in a first implementation manner of the ninth aspect of the embodiments of the present invention, when performing the step of sending pseudo access information to the AP, the processor specifically performs the following step: 
     sending a pseudo access association request message to the AP, where the pseudo association request message is used for initiating a pseudo access association request to the AP, and includes an information indication indicating the pseudo access information; and 
     before performing the step of establishing a pseudo access association with the AP, the processor is further configured to perform the following step: 
     receiving a pseudo access association response message sent by the AP, where the pseudo access association response message is a response to the pseudo access association request message, and is used for determining that the AP accepts the pseudo access association request sent by the STA. 
     With reference to the ninth aspect of the embodiments of the present invention, in a second implementation manner of the ninth aspect of the embodiments of the present invention, when performing the step of sending pseudo access information to the AP, the processor specifically performs the following step: 
     sending a pseudo access authentication request message to the AP, where the pseudo access authentication request message is used for initiating a pseudo access authentication request to the AP, and includes an authentication type parameter indicating the pseudo access information; and 
     before performing the step of establishing a pseudo access association with the AP, the processor is further configured to perform the following step: 
     receiving a pseudo access authentication response message sent by the AP, where the pseudo access authentication response message is a response to the pseudo access authentication request message, and is used for determining that the AP accepts the pseudo access authentication request sent by the SAT. 
     With reference to any one of the ninth aspect to the second implementation manner of the ninth aspect of the embodiments of the present invention, in a third implementation manner of the ninth aspect of the embodiments of the present invention, when performing the step of finding an access point AP supporting pseudo access, the processor specifically performs the following steps: 
     listening for a broadcast frame that is sent by an AP and that can be received; and 
     when a broadcast frame that is sent by a first AP and that is obtained by listening indicates that the first AP supports pseudo access, determining that the first AP is the AP supporting pseudo access. 
     With reference to any one of the ninth aspect to the second implementation manner of the ninth aspect of the embodiments of the present invention, in a fourth implementation manner of the ninth aspect of the embodiments of the present invention, when performing the step of finding an access point AP supporting pseudo access, the processor specifically performs the following steps: 
     sending a probe request frame including information indicating that an AP supporting pseudo access is searched for; and 
     receiving a probe response frame sent by a second AP, where the probe response frame indicates that the second AP is the AP supporting pseudo access. 
     A tenth aspect of the embodiments of the present invention provides an AP, including: 
     an input apparatus, an output apparatus, a processor, and a memory, where 
     the processor is configured to perform the following steps by invoking an operation instruction stored in the memory: 
     receiving pseudo access information sent by a STA, where the pseudo access information is used for enabling the AP to determine that access initiated by the STA is pseudo access, the STA is not an authorized user of the AP, the AP supports pseudo access, and the pseudo access is used for enabling an unauthorized user that accesses the AP to send a scheduling-related management frame to the AP and accept scheduling management by the AP; and 
     establishing a pseudo access association with the STA, so that the AP can receive a scheduling-related management frame sent by the STA and perform scheduling management on the STA. 
     With reference to the tenth aspect of the embodiments of the present invention, in a first implementation manner of the tenth aspect of the embodiments of the present invention, when performing the step of receiving pseudo access information sent by a STA, the processor specifically performs the following step: 
     receiving a pseudo access association request message sent by the STA, where the pseudo association request message is used for initiating a pseudo access association request to the AP, and includes an information indication indicating the pseudo access information; and 
     before performing the step of establishing a pseudo access association with the STA, the processor further performs the following step: 
     sending a pseudo access association response message to the STA, where the pseudo access association response message is a response to the pseudo access association request message, and is used for determining that the AP accepts the pseudo access association request sent by the STA. 
     With reference to the tenth aspect of the embodiments of the present invention, in a second implementation manner of the tenth aspect of the embodiments of the present invention, when performing the step of receiving pseudo access information sent by a STA, the processor specifically performs the following step: 
     receiving a pseudo access authentication request message sent by the STA, where the pseudo access authentication request message is used for initiating a pseudo access authentication request to the AP, and includes an authentication type parameter indicating the pseudo access information; and 
     before performing the step of establishing a pseudo access association with the STA, the processor further performs the following step: 
     sending a pseudo access authentication response message to the STA, where the pseudo access authentication response message is a response to the pseudo access authentication request message, and is used for determining that the AP accepts the pseudo access authentication request sent by the SAT. 
     With reference to any one of the tenth aspect to the third implementation manner of the tenth aspect of the embodiments of the present invention, in a fourth implementation manner of the tenth aspect of the embodiments of the present invention, before performing the step of receiving pseudo access information sent by a STA, the processor is further configured to perform the following step: 
     sending a broadcast frame, and indicating, in the broadcast frame, that the AP supports pseudo access. 
     With reference to any one of the tenth aspect to the third implementation manner of the tenth aspect of the embodiments of the present invention, in a fifth implementation manner of the tenth aspect of the embodiments of the present invention, before performing the step of receiving pseudo access information sent by a STA, the processor is further configured to perform the following steps: 
     receiving a probe request frame sent by the STA, where the probe request frame carries information indicating that an AP supporting pseudo access is searched for; and 
     sending a probe response frame to the STA, where the probe response frame indicates that the AP supports pseudo access. 
     An eleventh aspect of the embodiments of the present invention provides a STA, used as a first STA, and including: 
     an input apparatus, an output apparatus, a processor, and a memory, where 
     the processor is configured to perform the following steps by invoking an operation instruction stored in the memory: 
     establishing a P2P connection to a second STA; 
     establishing a pseudo access association with an AP supporting pseudo access, wherein the AP is the same one as that the second STA has established or will establish a pseudo access association with, where the first STA and the second STA are not authorized users of the AP; 
     establishing a direct connection to the second STA by using the AP; and 
     accepting direct connection scheduling by the AP along with the second STA. 
     With reference to the eleventh aspect of the embodiments of the present invention, in a first implementation manner of the eleventh aspect of the embodiments of the present invention, when performing the step of establishing a pseudo access association with an AP supporting pseudo access, wherein the AP is the same one as that the second STA has established or will establish a pseudo access association with, the processor is specifically configured to perform the following steps: 
     finding the AP supporting pseudo access; 
     notifying the second STA of an identifier of the found AP by using the P2P connection; and 
     establishing, a pseudo access association with the AP, wherein the second STA has established or will establish a pseudo access association with the AP. 
     With reference to the eleventh aspect or the first implementation manner of the eleventh aspect of the embodiments of the present invention, in a second implementation manner of the eleventh aspect of the embodiments of the present invention, when performing the step of establishing a direct connection to the second STA by using the AP, the processor is specifically configured to perform the following steps: 
     initiating a direct connection request to the AP, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA; and 
     receiving a direct connection response returned by the AP, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
     With reference to the eleventh aspect of the embodiments of the present invention, in a third implementation manner of the eleventh aspect of the embodiments of the present invention, when performing the step of accepting direct connection scheduling by the AP along with the second STA, the processor is specifically configured to perform the following steps: 
     requesting a direct connection transport stream from the AP, to notify the AP of a resource requirement of direct communication between the first STA and the second STA; and 
     performing direct communication with the second STA on a direct connection transport stream allocated by the AP. 
     With reference to the third implementation manner of the eleventh aspect of the embodiments of the present invention, in a fourth implementation manner of the eleventh aspect of the embodiments of the present invention, when performing the step of performing direct communication with the second STA on a direct connection transport stream allocated by the AP, the processor is specifically configured to perform the following step: 
     performing direct communication with the second STA on the direct connection transport stream allocated by the AP, and providing protection by using a key of the P2P connection. 
     A twelfth aspect of the embodiments of the present invention provides an AP, including: 
     an input apparatus, an output apparatus, a processor, and a memory, where 
     the processor is configured to perform the following steps by invoking an operation instruction stored in the memory: 
     establishing a pseudo access association with each of a first STA and a second STA, where the AP supports pseudo access, the first STA and the second STA are not authorized users of the AP, and a P2P connection is already established between the first STA and the second STA; 
     establishing a direct connection between the first STA and the second STA; and 
     performing direct connection scheduling on the first STA and the second STA. 
     With reference to the twelfth aspect of the embodiments of the present invention, in a first implementation manner of the twelfth aspect of the embodiments of the present invention, when performing the step of establishing a direct connection between the first STA and the second STA, the processor is specifically configured to perform the following steps: 
     receiving a direct connection request initiated by the first STA, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA; and 
     establishing a direct connection between the first STA and the second STA according to the direct connection request, and returning a direct connection response to the first STA, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
     With reference to the twelfth aspect or the first implementation manner of the twelfth aspect of the embodiments of the present invention, in a second implementation manner of the twelfth aspect of the embodiments of the present invention, when performing the step of performing direct connection scheduling on the first STA and the second STA, the processor is specifically configured to perform the following steps: 
     receiving a request of the first STA for a direct connection transport stream, to obtain a resource requirement of direct communication between the first STA and the second STA; and 
     allocating a direct connection transport stream for the first STA to perform direct communication with the second STA. 
     As can be seen from the foregoing technical solutions, the embodiments of the present invention have the following advantages: In the embodiments of the present invention, after finding an AP supporting pseudo access, a STA sends pseudo access information to the AP, and establishes a pseudo access association with the AP, so that a STA that is not an authorized user of the AP can perform pseudo access to the AP, and accept scheduling management by the AP. Therefore, in a dense scenario, multiple STAs can be prevented from contending for a same spectrum resource, thereby improving channel use efficiency for communication between the STAs. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a schematic flowchart of a pseudo access method according to an embodiment of the present invention; 
         FIG. 2  is another schematic flowchart of a pseudo access method according to an embodiment of the present invention; 
         FIG. 3  is another schematic flowchart of a pseudo access method according to an embodiment of the present invention; 
         FIG. 4  is another schematic flowchart of a pseudo access method according to an embodiment of the present invention; 
         FIG. 5  is a schematic flowchart of a direct connection scheduling method for pseudo access according to an embodiment of the present invention; 
         FIG. 6  is another schematic flowchart of a direct connection scheduling method for pseudo access according to an embodiment of the present invention; 
         FIG. 7  is another schematic flowchart of a direct connection scheduling method for pseudo access according to an embodiment of the present invention; 
         FIG. 8  is another schematic flowchart of a direct connection scheduling method for pseudo access according to an embodiment of the present invention; 
         FIG. 9  is another schematic flowchart of a direct connection scheduling method for pseudo access according to an embodiment of the present invention; 
         FIG. 10  is a schematic structural diagram of a station according to an embodiment of the present invention; 
         FIG. 11  is another schematic structural diagram of a station according to an embodiment of the present invention; 
         FIG. 12  is another schematic structural diagram of a station according to an embodiment of the present invention; 
         FIG. 13  is a schematic structural diagram of an access point according to an embodiment of the present invention; 
         FIG. 14  is another schematic structural diagram of an access point according to an embodiment of the present invention; 
         FIG. 15  is another schematic structural diagram of an access point according to an embodiment of the present invention; 
         FIG. 16  is another schematic structural diagram of an access point according to an embodiment of the present invention; 
         FIG. 17  is another schematic structural diagram of an access point according to an embodiment of the present invention; 
         FIG. 18  is another schematic structural diagram of a station according to an embodiment of the present invention; 
         FIG. 19  is another schematic structural diagram of a station according to an embodiment of the present invention; 
         FIG. 20  is another schematic structural diagram of an access point according to an embodiment of the present invention; 
         FIG. 21  is another schematic structural diagram of an access point according to an embodiment of the present invention; and 
         FIG. 22  is a schematic structural diagram of a device according to an embodiment of the present invention. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are merely some but not all of the embodiments of the present invention. All other embodiments obtained by persons skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. 
     It should be understood that, in the embodiments of the present invention, terms such as first and second may be used to describe STAs or APs, but the STAs or the APs should not be limited to these terms. These terms are only used to distinguish STAs or APs. For example, without departing from the scope of the embodiments of the present invention, a first STA may also be referred to as a second STA. Similarly, a second STA may also be referred to as a first STA. Similarly, a second AP may also be referred to as a third AP, or the like. This is not limited in the embodiments of the present invention. 
     A pseudo access method in an embodiment of the present invention is described below by separately using a STA and an AP as an execution body. 
     1. A STA is used as an execution body. 
     Referring to  FIG. 1 , an embodiment of a pseudo access method in the embodiments of the present invention includes the following steps. 
       101 : A STA finds an AP supporting pseudo access. 
     A STA may find an AP supporting pseudo access, where the STA is not an authorized user of the AP, the pseudo access is used for enabling an unauthorized user that accesses the AP to send a scheduling-related management frame to the AP and accept scheduling management by the AP. 
     It should be noted that, the scheduling-related management frame may specifically include: 
     a management frame used for creating a direct link, that is, a DLS request, a DLS response, or the like; 
     a management frame used for creating or modifying a transport stream, that is, an ADDTS or the like; and 
     a management frame used for requesting a transmission resource, or the like. 
     It may be understood that, the STA may find an AP supporting pseudo access in multiple manners: 
     Optionally, the STA may listen for a broadcast frame that is sent by an AP and that can be received; and if a broadcast frame that is sent by a first AP and that is obtained by listening indicates that the first AP supports pseudo access, the STA determines that the first AP is the AP supporting pseudo access. Specifically, the AP may add indication information to a beacon message broadcast by the AP to indicate that the AP supports pseudo access. 
     Optionally, the STA may send a probe request frame, and add, to the probe request frame, information indicating that an AP supporting pseudo access is searched for; and then, the STA receives a probe response frame sent by a second AP, where the probe response frame indicates that the second AP is the AP supporting pseudo access. Specifically, when the STA runs in a network of the IEEE802.11 standard, the probe request message may be a probe request frame defined in the 802.11, and the probe response message may be a probe response frame defined in the 802.11. 
       102 : The STA sends pseudo access information to the AP, where the pseudo access information is used by the AP to determine that access initiated by the STA is pseudo access. 
     After finding the AP supporting pseudo access, the STA sends pseudo access information to the AP, where the pseudo access information is used for enabling the AP to determine that access initiated by the STA is pseudo access. 
       103 : The STA establishes a pseudo access association with the AP, so that the STA can send a scheduling-related management frame to the AP and accept scheduling management by the AP. 
     After sending the pseudo access information to the AP, the STA establishes a pseudo access association with the AP, so that the STA can send a scheduling-related management frame to the AP and accept scheduling management by the AP. 
     In this embodiment of the present invention, after finding an AP supporting pseudo access, a STA sends pseudo access information to the AP, and establishes a pseudo access association with the AP, so that a STA that is not an authorized user of the AP can perform pseudo access to the AP, and accept scheduling management by the AP. Therefore, in a dense scenario, multiple STAs can be prevented from contending for a same spectrum resource, thereby improving channel use efficiency for communication between the STAs. 
     2. An AP is used as an execution body. 
     Referring to  FIG. 2 , another embodiment of a pseudo access method in the embodiments of the present invention includes the following steps. 
       201 : An AP receives pseudo access information sent by a STA. 
     An AP supporting pseudo access may receive pseudo access information sent by a STA, where the pseudo access information is used for enabling the AP to determine that access initiated by the STA is pseudo access, the STA is not an authorized user of the AP, and the pseudo access is used for enabling an unauthorized user that accesses the AP to send a scheduling-related management frame to the AP and accept scheduling management by the AP. 
     It may be understood that, before the step of receiving, by an AP, pseudo access information sent by a STA, the STA needs to first find that the AP supports pseudo access, which may have multiple manners: 
     Optionally, the AP may send a broadcast frame, and indicate, in the broadcast frame, that the AP supports pseudo access. 
     Optionally, the AP may receive a probe request frame sent by the STA, where the probe request frame carries information indicating that an AP supporting pseudo access is searched for; and then, the AP sends a probe response frame to the AP, where the probe response frame indicates that the AP supports pseudo access. 
       202 : The AP establishes a pseudo access association with the STA, so that the AP can receive a scheduling-related management frame sent by the STA and perform scheduling management on the STA. 
     After receiving the pseudo access information sent by the STA, the AP establishes a pseudo access association with the STA, so that the AP can receive a scheduling-related management frame sent by the STA and perform scheduling management on the STA. 
     In this embodiment of the present invention, after receiving pseudo access information sent by a STA, an AP establishes a pseudo access association with the STA, so that a STA that is not an authorized user of the AP can perform pseudo access to the AP, and accept scheduling management by the AP. Therefore, in a dense scenario, multiple STAs can be prevented from contending for a same spectrum resource, thereby improving channel use efficiency for communication between the STAs. 
     In the foregoing embodiment, the STA sends the pseudo access information to the AP, and in actual application, the pseudo access information maybe sent to the AP in different phases of communication between the STA and the AP, so as to instruct to perform pseudo access. The pseudo access method in this embodiment of the present invention is separately described below by using interaction between the STA and the AP when the pseudo access information is sent in different phases. 
     1. In an 802.11 authentication process, it is instructed that pseudo access is performed: 
     Referring to  FIG. 3 , another embodiment of a pseudo access method in the embodiments of the present invention includes the following steps. 
       301 : A STA finds an AP supporting pseudo access. 
     This step is similar to step  101 , and details are not described herein again. 
       302 : The STA sends a pseudo access authentication request message to the AP. 
     After finding an AP supporting pseudo access, the STA sends a pseudo access authentication request message to the AP, where the pseudo access authentication request message is used for initiating a pseudo access authentication request to the AP, and includes an authentication type parameter indicating the pseudo access information. 
     Specifically, an 802.11 authentication message may indicate pseudo access authentication. In the existing 802.11 standard, an 802.11 authentication message carries an authentication type parameter to indicate a type of authentication performed. When a value of the authentication type parameter is 0, it indicates open system authentication (Open System). When a value of the authentication type parameter is 1, it indicates shared key authentication (Shared Key, that is, a same key is preset in the STA and the AP). When a value of the authentication type parameter is 2, it indicates fast transition authentication (Fast Transition, that is, the STA fast switches from one AP to another AP) . When a value of the authentication type parameter is 3, it indicates ad hoc synchronous authentication (used for ad hoc authentication between two neighboring nodes in a mesh network). In this step, on this basis, a definition may be added for the authentication type parameter, for example, when the value is 4, it indicates pseudo access authentication. Certainly, a new frame may also be defined to perform pseudo access 802.11 authentication. This is not limited herein. 
       303 : The AP receives the pseudo access authentication request message sent by the STA. 
     After the STA sends the pseudo access authentication request message to the AP, the AP receives the pseudo access authentication request message sent by the STA, where the pseudo access authentication request message is used for initiating a pseudo access authentication request to the AP, and includes an authentication type parameter indicating the pseudo access information. 
       304 : The AP sends a pseudo access authentication response message to the STA. 
     After the AP receives the pseudo access authentication request message sent by the STA, if the AP agrees on the pseudo access authentication request, the AP may send the pseudo access authentication response message to the STA, where the pseudo access authentication response message is a response to the pseudo access authentication request message, and is used for determining that the AP accepts the pseudo access authentication request sent by the SAT. 
       305 : The STA receives the pseudo access authentication response message sent by the AP. 
     After the AP sends the pseudo access authentication response to the STA, the STA receives the pseudo access authentication response message sent by the AP, where the pseudo access authentication response message is a response to the pseudo access authentication request message, and is used for determining that the AP accepts the pseudo access authentication request sent by the SAT. 
       306 : The STA sends an association request message to the AP. 
       307 : The AP receives the association request message sent by the STA. 
       308 : The AP sends an association response message to the STA. 
       309 : The STA receives the association response message sent by the AP. 
     The association response message may carry an association identifier that is allocated by the AP to the STA. 
     It should be noted that, step  306  and step  309  are similar to implementation in an existing standard, and an only difference is that the AP can determine that 802.11 authentication performed in step  303  to step  305  is pseudo access authentication. In this case, actually, pseudo access is completed after an 802.11 association is established in step  307  and step  308 . 
       310 : The STA and the AP establish a pseudo access association, so that the STA can send a scheduling-related management frame to the AP and accept scheduling management by the AP. 
     The AP sends the association response message to the STA, and after the STA receives the association response message, all conditions for establishing a pseudo access association are already satisfied. In this case, the STA establishes a pseudo access association with the AP, so that the STA can send a scheduling-related management frame to the AP and accept scheduling management by the AP. 
     In this embodiment of the present invention, a pseudo access message is added to a pseudo access authentication request message in an 802.11 authentication process, and an existing standard only needs to be modified slightly to implement pseudo access, without adding more unnecessary steps, thereby improving efficiency of performing pseudo access by a STA to an AP. 
     It may be understood that, in the embodiment corresponding to  FIG. 3 , step  301 , step  302 , step  305 , step  306 , step  309 , and step  310  are steps performed by the STA as an execution body to implement the pseudo access method. Step  304 , step  304 , step  307 , step  308 , and step  310  are steps performed by the AP as an execution body to implement the pseudo access method. 
     2. In an 802.11 association process, it is instructed that pseudo access is performed: 
     Referring to  FIG. 4 , another embodiment of a pseudo access method in the embodiments of the present invention includes the following steps. 
       401 : A STA finds an AP supporting pseudo access. 
     This step is similar to step  101 , and details are not described herein again. 
       402 : The STA sends an authentication request message to the AP. 
       403 : The AP receives the authentication request message sent by the STA. 
       404 : The AP sends an authentication response message to the STA. 
       405 : The STA receives the authentication response message sent by the AP. 
     It should be noted that, step  402  and step  405  are similar to implementation in an existing standard. Specifically, an authentication authentication frame in the existing 802.11 standard may be not modified. 
       406 : The STA sends a pseudo access association request message to the AP. 
     After receiving the authentication response message sent by the AP, the STA may send a pseudo access association message to the AP, where the pseudo association request message is used for initiating a pseudo access association request to the AP, and includes an information indication indicating pseudo access information. 
     Specifically, an association request association request frame defined in the 802.11 may be used, and an information indication is added to the association request frame to indicate that the association request frame is a pseudo access association request. A specific indication manner may be adding an information element, and existence of the information element indicates that the STA requests a pseudo access association. For the information element, refer to the 802.11 standard text, and details are not described herein. In addition, a manner of adding pseudo access indication information is not limited to a manner of using an information element; and a new frame may also be additionally defined as a pseudo access association request. This is not limited herein. 
       407 : The AP receives the pseudo access association request message sent by the STA. 
     After the STA sends the pseudo access association request message to the AP, the AP receives the pseudo access association request message sent by the STA, where the pseudo association request message is used for initiating a pseudo access association request to the AP, and includes an information indication indicating the pseudo access information. 
       408 : The AP sends a pseudo access association response message to the STA. 
     After the AP receives the pseudo access association request message sent by the STA, if the AP agrees on the pseudo access association request, the AP sends the pseudo access association response message to the STA, where the pseudo access association response message is a response to the pseudo access association request message, and is used for determining that the AP accepts the pseudo access association request sent by the STA. 
       409 : The STA receives the pseudo access association response message sent by the AP. 
     After the AP sends the pseudo access association response message to the STA, the STA receives the pseudo access association response message sent by the AP, where the pseudo access association response message is a response to the pseudo access association request message, and is used for determining that the AP accepts the pseudo access association request sent by the STA. 
       410 : The STA and the AP establish a pseudo access association, so that the STA can send a scheduling-related management frame to the AP and accept scheduling management by the AP. 
     This step is similar to step  310 , and details are not described herein again. 
     In this embodiment of the present invention, a pseudo access message is added to a pseudo access association request message in an 802.11 association process, and an existing standard only needs to be modified slightly to implement pseudo access, without adding more unnecessary steps, thereby improving efficiency of performing pseudo access by a STA to an AP. 
     It may be understood that, in the embodiment corresponding to  FIG. 4 , step  401 , step  402 , step  405 , step  406 , step  409 , and step  410  are steps performed by the STA as an execution body to implement the pseudo access method. Step  404 , step  404 , step  407 , step  408 , and step  410  are steps performed by the AP as an execution body to implement the pseudo access method. 
     A direct connection scheduling method for pseudo access in an embodiment of the present invention is described below. 
     1. A first STA is used as an execution body. 
     Referring to  FIG. 5 , an embodiment of a direct connection scheduling method for pseudo access in the embodiments of the present invention includes the following steps. 
       501 : A first STA establishes a P2P connection to a second STA. 
     The first STA establishes a P2P connection to the second STA for communication. A process of establishing the P2P connection is not described in detail herein. The first STA and the second STA negotiate a key of the P2P connection in the process of establishing the P2P connection, and communication between the first STA and the second STA is protected by the key. 
       502 : The first STA establishes, a pseudo access association with an AP supporting pseudo access, wherein the AP is the same one as that the second STA has established or will establish a pseudo access association with, where the first STA and the second STA are not authorized users of the AP. 
     When a communication environment is crowded, the first STA establishes a pseudo access association with an AP supporting pseudo access, wherein the AP is the same one as that the second STA has established or will establish a pseudo access association with, where the first STA and the second STA are not authorized users of the AP. It may be understood that, the AP supports pseudo access, and the AP also supports direct connection scheduling. For the step of establishing a pseudo access association, refer to the pseudo access method in the embodiments of the present invention, and details are not described herein again. 
       503 : The first STA establishes a direct connection to the second STA by using the AP. 
     After the first STA and the second STA perform pseudo access to the same AP, the first STA establishes a direct connection to the second STA by using the AP. 
       504 : The first STA accepts, along with the second STA, direct connection scheduling by the AP. 
     After the first STA establishes the direct connection to the second STA by using the AP, the first STA and the second STA accept direct connection scheduling by the AP. 
     In this embodiment of the present invention, in a dense scenario, a first STA and a second STA that has established a P2P connection can perform pseudo access to an AP, and accept direct connection scheduling by the AP, so as to prevent a collision when a P2P user and an AP user contend for a same channel resource, and improve channel efficiency in the dense scenario. 
     The direct connection scheduling method for pseudo access in this embodiment of the present invention is described in detail below. Referring to  FIG. 6 , another embodiment of a direct connection scheduling method for pseudo access in the embodiments of the present invention includes the following steps. 
       601 : A first STA establishes a P2P connection to a second STA. 
     This step is similar to step  501 , and details are not described herein again. 
       602 : The first STA finds an AP supporting pseudo access. 
     The first STA finds that an environment is crowded and a communication effect is poor, and therefore searches for an AP supporting pseudo access. For a process of searching for an AP, refer to the pseudo access method in the embodiments of the present invention, and details are not described herein again. Certainly, the AP supporting pseudo access herein actually also supports direct connection scheduling. 
       603 : The first STA notifies the second STA of an identifier of the found AP by using the P2P connection. 
     The first STA finds the AP supporting pseudo access, and notifies the second STA of the identifier of the AP by using the P2P connection, so that the second STA also performs pseudo access to the AP. Specifically, the second STA may also initiatively find such an AP, and may notify the first STA of the found AP supporting pseudo access. APs respectively found by the first STA and the second STA maybe not the same; therefore, the first STA and the second STA further need to negotiate an AP to access together. This is not limited herein. 
       604 : The first STA establishes a pseudo access association with the AP, wherein the second STA has established or will establish a pseudo access association with the same AP. 
     After the second STA obtains the AP supporting pseudo access that is found by the first STA, both the first STA and the second STA establish a pseudo access association with the AP. 
       605 : The first STA initiates a direct connection request to the AP, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA. 
     After both the first STA and the second STA establish the pseudo access association with the AP, the first STA initiates a direct connection request to the AP, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA. That is, the direct connection request sent by the first STA indicates that a direct connection object is the second STA. 
       606 : The first STA receives a direct connection response returned by the AP, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
     After the first STA sends the direct connection request, the first STA receives a direct connection response returned by the AP, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
       607 : The first STA requests a direct connection transport stream from the AP, to notify the AP of a resource requirement of direct communication between the first STA and the second STA. 
     After the direct connection is established between the first STA and the second STA, the first STA requests a direct connection transport stream from the AP, to notify the AP of a resource requirement of direct communication between the first STA and the second STA. 
     In an existing standard, after a direct connection is established successfully, a first STA should initiate an SMK (STA to STA link Master Key, master key of a direct link) handshake process to enable two parties of the direct connection to obtain an SMK. However, in a pseudo access process, a STA and an AP do not perform a security authentication process for authentication; therefore, there is no temporary key between the first STA and the AP, message exchange is not protected, and the SMK cannot be securely sent to the first STA and a second STA. Consequently, SMK handshake cannot be performed, and further, 4-way STK handshake, based on the SMK, between the first STA and the second STA cannot be performed either. Because the AP knows that the first STA and the second STA perform pseudo access to the AP, the AP allows the first STA and the second STA to perform a subsequent operation without performing SMK handshake after a direct connection is established between the first STA and the second STA. 
       608 : The first STA performs direct communication with the second STA on a direct connection transport stream allocated by the AP. 
     After the first STA requests the direct connection transport stream from the AP, the first STA performs direct communication with the second STA on the direct connection transport stream allocated by the AP. 
     It maybe understood that, when the first STA performs direct communication with the second STA on the direct connection transport stream, protection may be provided by using a key of the P2P connection. 
     In this embodiment of the present invention, in a dense scenario, a first STA and a second STA that has established a P2P connection can perform pseudo access to an AP, and accept direct connection scheduling by the AP, so as to prevent a collision when a P2P user and an AP user contend for a same channel resource, and improve channel efficiency in the dense scenario. 
     2. An AP is used as an execution body. 
     Referring to  FIG. 7 , another embodiment of a direct connection scheduling method for pseudo access in the embodiments of the present invention includes the following steps. 
       701 : An AP establishes a pseudo access association with each of a first STA and a second STA, where the AP supports pseudo access, the first STA and the second STA are not authorized users of the AP, and a P2P connection is already established between the first STA and the second STA. 
       702 : The AP establishes a direct connection between the first STA and the second STA. 
       703 : The AP performs direct connection scheduling on the first STA and the second STA. 
     In this embodiment of the present invention, in a dense scenario, a first STA and a second STA that has established a P2P connection can perform pseudo access to an AP, and accept direct connection scheduling by the AP, so as to prevent a collision when a P2P user and an AP user contend for a same channel resource, and improve channel efficiency in the dense scenario. 
     The direct connection scheduling method for pseudo access in this embodiment of the present invention is described in detail below. Referring to  FIG. 8 , another embodiment of a pseudo access scheduling method in the embodiments of the present invention includes the following steps. 
       801 : An AP establishes a pseudo access association with each of a first STA and a second STA, where the AP supports pseudo access, the first STA and the second STA are not authorized users of the AP, and a P 2 P connection is already established between the first STA and the second STA. 
       802 : The AP receives a direct connection request initiated by the first STA, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA. 
       803 : The AP establishes a direct connection between the first STA and the second STA according to the direct connection request, and returns a direct connection response to the first STA, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
       804 : The AP receives a request of the first STA for a direct connection transport stream, to obtain a resource requirement of direct communication between the first STA and the second STA. 
       805 : The AP allocates a direct connection transport stream for the first STA to perform direct communication with the second STA. 
     In this embodiment of the present invention, in a dense scenario, a first STA and a second STA that has established a P2P connection can perform pseudo access to an AP, and accept direct connection scheduling by the AP, so as to prevent a collision when a P2P user and an AP user contend for a same channel resource, and improve channel efficiency in the dense scenario. 
     The pseudo access scheduling method in this embodiment of the present invention is described below by using interaction between the first STA and the second STA and the AP. Referring to  FIG. 9 , another embodiment of pseudo access scheduling method in the embodiments of the present invention includes the following steps. 
       901 : A first STA establishes a P2P connection to a second STA for communication. The first STA and the second STA negotiate a key of the P2P connection in the process of establishing the P2P connection, and communication between the first STA and the second STA is protected by the key. 
       902 : The first STA finds that an environment is crowded and a communication effect is poor, and therefore finds an AP supporting pseudo access. Certainly, the AP supporting pseudo access herein actually also supports direct connection scheduling; otherwise, it is meaningless for a STA to perform pseudo access to the AP. 
       903 : The first STA finds the AP supporting pseudo access, and notifies the second STA of the information. This means that the second STA is requested to also perform pseudo access to the AP. Specifically, the second STA may also initiatively find such an AP, and may notify the first STA of the found AP supporting pseudo access. APs respectively found by the first STA and the second STA may be not the same; therefore, the first STA and the second STA further need to negotiate an AP to access together. 
       904 : The first STA completes pseudo access to the AP. 
       905 : The first STA requests direct connection establishment from the AP, where a direct connection object is the second STA. 
       906 : If the second STA has not accessed the AP at this time, the AP rejects the direct connection request of the first STA. 
       907 : The second STA performs pseudo access to the AP. 
       908 : The first STA requests direct connection establishment from the AP again later, where a direct connection object is the second STA. 
       909 : The AP accepts the direct connection request, and sends the direct connection request to the second STA, to indicate that a direct connection object is the first STA. 
       910 : The second STA accepts the direct connection request, and returns a direct connection response to the AP. 
       911 : The AP sends the direct connection response to the first STA, to indicate that a direct connection is established successfully. 
     In an existing standard, after a direct connection is established successfully, a first STA should initiate an SMK handshake process to enable two parties of the direct connection to obtain an SMK. However, in a pseudo access process, a STA and an AP do not perform a security authentication process for authentication; therefore, there is no temporary key between the first STA and the AP, message exchange is not protected, and the SMK cannot be securely sent to the first STA and a second STA. Consequently, SMK handshake cannot be performed, and further, 4-way STK handshake, based on the SMK, between the first STA and the second STA cannot be performed either. Because the AP knows that the first STA and the second STA perform pseudo access to the AP, the AP allows the first STA and the second STA to perform a subsequent operation without performing SMK handshake after a direct connection is established between the first STA and the second STA. 
       912 : The first STA requests establishment of a direct connection transport stream from the AP, so that the AP knows a resource requirement of direct communication between the first STA and the second STA. 
       913 : The AP may schedule the first STA and the second STA according to a communication requirement of the first STA and the second STA, thereby improving channel use efficiency in a dense environment. 
       914 : The first STA performs direct communication with the second STA, where the communication is still protected by using a key of a P2P link. Therefore, even if there is no STK handshake, communication between the first STA and the second STA is still secure. 
     A STA for pseudo access in an embodiment of the present invention is described below. 
     Referring to  FIG. 10 , an embodiment of a STA in the embodiments of the present invention includes: 
     a finding module  1001 , configured to find an access point AP supporting pseudo access, where the STA is not an authorized user of the AP, and the pseudo access is used for enabling an unauthorized user that accesses the AP to send a scheduling-related management frame to the AP and accept scheduling management by the AP; 
     a first sending module  1002 , configured to send pseudo access information to the AP, where the pseudo access information is used by the AP to determine that access initiated by the STA is pseudo access; and 
     a first establishment module  1003 , configured to establish a pseudo access association with the AP, so that the STA can send a scheduling-related management frame to the AP and accept scheduling management by the AP. 
     In this embodiment of the present invention, after the finding module  1001  finds an AP supporting pseudo access, the first sending module  1002  sends pseudo access information to the AP, and the first establishment module  1003  establishes a pseudo access association with the AP, so that a STA that is not an authorized user of the AP can perform pseudo access to the AP, and accept scheduling management by the AP. Therefore, in a dense scenario, multiple STAs can be prevented from contending for a same spectrum resource, thereby improving channel use efficiency for communication between the STAs. 
     In the foregoing embodiment, the finding module  1001  may include multiple different units to find an access point AP supporting pseudo access: 
     Optionally, in another embodiment of the STA in this embodiment of the present invention, the finding module  1001  may specifically include: 
     a listening unit, configured to listen for a broadcast frame that is sent by an AP and that can be received; and 
     a determining unit, configured to: when a broadcast frame that is sent by a first AP and that is obtained by the listening unit by listening indicates that the first AP supports pseudo access, determine that the first AP is the AP supporting pseudo access. 
     Optionally, in another embodiment of the STA in this embodiment of the present invention, the finding module  1001  may specifically include: 
     a probe sending unit, configured to: send a probe request frame, and add, to the probe request frame, information indicating that an AP supporting pseudo access is searched for; and 
     a response receiving unit, configured to receive a probe response frame sent by a second AP, where the probe response frame indicates that the second AP is the AP supporting pseudo access. 
     In the foregoing embodiment, the first sending module  1002  may also send the pseudo access information to the AP in multiple different manners: 
     Optionally, in another embodiment of the STA in the embodiments of the present invention, referring to  FIG. 11 , the first sending module  1002  may be specifically configured to send a pseudo access association request message to the AP, where the pseudo association request message is used for initiating a pseudo access association request to the AP, and includes an information indication indicating the pseudo access information. The STA may further include: a first receiving module  1101 , configured to: before the pseudo access association is established with the AP, receive a pseudo access association response message sent by the AP, where the pseudo access association response message is a response to the pseudo access association request message, and is used for determining that the AP accepts the pseudo access association request sent by the STA. 
     In this embodiment of the present invention, the first sending module  1002  adds a pseudo access message to a pseudo access authentication request message in an 802.11 authentication process, and an existing standard only needs to be modified slightly to implement pseudo access, without adding more unnecessary steps, thereby improving efficiency of performing pseudo access by a STA to an AP. 
     Optionally, in another embodiment of the STA in the embodiments of the present invention, referring to  FIG. 12 , the first sending module  1002  may be specifically configured to send a pseudo access authentication request message to the AP, where the pseudo access authentication request message is used for initiating a pseudo access authentication request to the AP, and includes an authentication type parameter indicating the pseudo access information. The STA may further include: a second receiving module  1201 , configured to: before the pseudo access association is established with the AP, receive a pseudo access authentication response message sent by the AP, where the pseudo access authentication response message is a response to the pseudo access authentication request message, and is used for determining that the AP accepts the pseudo access authentication request sent by the SAT. 
     In this embodiment of the present invention, the first sending module  1002  adds a pseudo access message to a pseudo access authentication request message in an 802.11 authentication process, and an existing standard only needs to be modified slightly to implement pseudo access, without adding more unnecessary steps, thereby improving efficiency of performing pseudo access by a STA to an AP. 
     An AP for pseudo access in an embodiment of the present invention is described below. 
     Referring to  FIG. 13 , an embodiment of an AP in the embodiments of the present invention includes: 
     a third receiving module  1301 , configured to receive pseudo access information sent by a STA, where the pseudo access information is used for enabling the AP to determine that access initiated by the STA is pseudo access, the STA is not an authorized user of the AP, the AP supports pseudo access, and the pseudo access is used for enabling an unauthorized user that accesses the AP to send a scheduling-related management frame to the AP and accept scheduling management by the AP; and 
     a second establishment module  1302 , configured to establish a pseudo access association with the STA, so that the AP can receive a scheduling-related management frame sent by the STA and perform scheduling management on the STA. 
     In this embodiment of the present invention, after the third receiving module  1301  receives pseudo access information sent by a STA, the second establishment module  1302  establishes a pseudo access association with the STA, so that a STA that is not an authorized user of the AP can perform pseudo access to the AP, and accept scheduling management by the AP. Therefore, in a dense scenario, multiple STAs can be prevented from contending for a same spectrum resource, thereby improving channel use efficiency for communication between the STAs. 
     In the foregoing embodiment, before the third receiving module  1301  receives the pseudo access information sent by the STA, the STA needs to first find the AP. This may be implemented in multiple manners. 
     Optionally, in another embodiment of the AP in the embodiments of the present invention, referring to  FIG. 14 , the AP further includes: 
     a fourth sending module  1401 , configured to: before the pseudo access information sent by the STA is received, send a broadcast frame, and indicate, in the broadcast frame, that the AP supports pseudo access. 
     Optionally, in another embodiment of the AP in the embodiments of the present invention, referring to  FIG. 15 , the AP further includes: 
     a probe receiving module  1501 , configured to receive a probe request frame sent by the STA, where the probe request frame carries information indicating that an AP supporting pseudo access is searched for; and 
     a response sending module  1502 , configured to send a probe response frame to the STA, where the probe response frame indicates that the AP supports pseudo access. 
     In the foregoing embodiment, the third receiving module  1301  may receive, in multiple different manners, the pseudo access information sent by the STA: 
     Optionally, in another embodiment of the AP in the embodiments of the present invention, referring to  FIG. 16 , the third receiving module  1301  is specifically configured to receive a pseudo access association request message sent by the STA, where the pseudo association request message is used for initiating a pseudo access association request to the AP, and includes an information indication indicating the pseudo access information. The AP further includes: a second sending module  1601 , configured to: before the pseudo access association is established with the STA, send a pseudo access association response message to the STA, where the pseudo access association response message is a response to the pseudo access association request message, and is used for determining that the AP accepts the pseudo access association request sent by the STA. 
     In this embodiment of the present invention, the third receiving module  1301  receives a pseudo access message that is carried in a pseudo access authentication request message in an 802.11 authentication process, and an existing standard only needs to be modified slightly to implement pseudo access, without adding more unnecessary steps, thereby improving efficiency of performing pseudo access by a STA to an AP. 
     Optionally, in another embodiment of the AP in the embodiments of the present invention, referring to  FIG. 17 , the third receiving module  1301  is specifically configured to receive a pseudo access authentication request message sent by the STA, where the pseudo access authentication request message is used for initiating a pseudo access authentication request to the AP, and includes an authentication type parameter indicating the pseudo access information. The AP further includes: a third sending module  1701 , configured to: before the pseudo access association is established with the STA, send a pseudo access authentication response message to the STA, where the pseudo access authentication response message is a response to the pseudo access authentication request message, and is used for determining that the AP accepts the pseudo access authentication request sent by the SAT. 
     In this embodiment of the present invention, the third receiving module  1301  receives a pseudo access message that is carried in a pseudo access authentication request message in an 802.11 authentication process, and an existing standard only needs to be modified slightly to implement pseudo access, without adding more unnecessary steps, thereby improving efficiency of performing pseudo access by a STA to an AP. 
     A STA for direct connection scheduling for pseudo access in an embodiment of the present invention is described below. 
     Referring to  FIG. 18 , an embodiment of a STA used as a first STA in the embodiments of the present invention includes: 
     a third establishment module  1801 , configured to establish a P2P connection to a second STA; 
     a fourth establishment module  1802 , configured to establish, a pseudo access association with an AP supporting pseudo access, wherein the AP is the same one as that the second STA has established or will establish a pseudo access association with, where the first STA and the second STA are not authorized users of the AP; 
     a fifth establishment module  1803 , configured to establish a direct connection to the second STA by using the AP; and 
     a scheduling acceptance module  1804 , configured to accept direct connection scheduling by the AP along with the second STA. 
     In this embodiment of the present invention, the third establishment module  1801  establishes a P2P connection to a second STA, in a dense scenario, the fourth establishment module  1802  performs pseudo access to an AP, and the scheduling acceptance module  1804  accepts direct connection scheduling by the AP, so as to prevent a collision when a P2P user and an AP user contend for a same channel resource, and improve channel efficiency in the dense scenario. 
     In the foregoing embodiment, the fourth establishment module  1802  establishes, a pseudo access association with an AP supporting pseudo access, wherein the AP is the same one as that the second STA has established or will establish a pseudo access association with. In actual application, the first STA that finds the AP supporting pseudo access may send an identifier of the AP to the second STA. Referring to  FIG. 19 , in another embodiment of the STA in the embodiments of the present invention, the fourth establishment module  1802  specifically includes: 
     a finding unit  1901 , configured to find the AP supporting pseudo access; 
     a notification unit  1902 , configured to notify the second STA of an identifier of the found AP by using the P2P connection; and 
     an establishment unit  1903 , configured to establish, a pseudo access association with the AP, wherein the second STA has established or will establish a pseudo access association with the same AP. 
     Optionally, the fifth establishment module  1803  may specifically include: 
     a direct connection request initiation unit  1904 , configured to initiate a direct connection request to the AP, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA; and 
     a direct connection response receiving unit  1905 , configured to receive a direct connection response returned by the AP, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
     Optionally, the scheduling acceptance module  1804  may specifically include: 
     a transport stream request unit  1906 , configured to request a direct connection transport stream from the AP, to notify the AP of a resource requirement of direct communication between the first STA and the second STA; and 
     a communications unit  1907 , configured to perform direct communication with the second STA on a direct connection transport stream allocated by the AP. 
     Optionally, the communications unit  1907  maybe specifically configured to: perform direct communication with the second STA on the direct connection transport stream allocated by the AP, and provide protection by using a key of the P2P connection. 
     In this embodiment of the present invention, the third establishment module  1801  establishes a P2P connection to a second STA, in a dense scenario, the fourth establishment module  1802  performs pseudo access to an AP, and the scheduling acceptance module  1804  accepts direct connection scheduling by the AP, so as to prevent a collision when a P2P user and an AP user contend for a same channel resource, and improve channel efficiency in the dense scenario. 
     An AP for direct connection scheduling for pseudo access in an embodiment of the present invention is described below. 
     Referring to  FIG. 20 , another embodiment of an AP in the embodiments of the present invention includes: 
     a sixth establishment module  2001 , configured to establish a pseudo access association with each of a first STA and a second STA, where the AP supports pseudo access, the first STA and the second STA are not authorized users of the AP, and a P2P connection is already established between the first STA and the second STA; 
     a seventh establishment module  2002 , configured to establish a direct connection between the first STA and the second STA; and 
     a scheduling module  2003 , configured to perform direct connection scheduling on the first STA and the second STA. 
     In this embodiment of the present invention, the sixth establishment module  2001  establishes a pseudo access association with a first STA and a second STA that has established a P2P connection, and in a dense scenario, the seventh establishment module  2002  establishes a direct connection between the first STA and the second STA, so that the first STA and the second STA accept direct connection scheduling of an AP, so as to prevent a collision when a P2P user and an AP user contend for a same channel resource, and improve channel efficiency in the dense scenario. 
     The AP for direct connection scheduling for pseudo access in this embodiment of the present invention is described in detail below. Referring to  FIG. 21 , in another embodiment of the AP in the embodiments of the present invention, the seventh establishment module  2002  specifically includes: 
     a direct connection request receiving unit  2101 , configured to receive a direct connection request initiated by the first STA, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA; and 
     a direct connection request response unit  2102 , configured to: establish a direct connection between the first STA and the second STA according to the direct connection request, and return a direct connection response to the first STA, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
     The scheduling module  2003  specifically includes: 
     a transport stream request receiving unit  2103 , configured to receive a request of the first STA for a direct connection transport stream, to obtain a resource requirement of direct communication between the first STA and the second STA; and 
     a transport stream allocation unit  2104 , configured to allocate a direct connection transport stream for the first STA to perform direct communication with the second STA. 
     In this embodiment of the present invention, the sixth establishment module  2001  establishes a pseudo access association with a first STA and a second STA that has established a P 2 P connection, and in a dense scenario, the seventh establishment module  2002  establishes a direct connection between the first STA and the second STA, so that the first STA and the second STA accept direct connection scheduling of an AP, so as to prevent a collision when a P2P user and an AP user contend for a same channel resource, and improve channel efficiency in the dense scenario. 
     Referring to  FIG. 22 ,  FIG. 22  is structural diagram of a device according to an embodiment of the present invention. A STA or an AP in this embodiment of the present invention may use a structure of the device. The device  2200  includes: 
     an input apparatus  2201 , an output apparatus  2202 , a processor  2203 , and a memory  2204  (there may be one or more processors  2203  in the device  2200 , and in  FIG. 22 , one processor  2203  is used as an example). In some embodiments of the present invention, the input apparatus  2201 , the output apparatus  2202 , the processor  2203 , and the memory  2204  may be connected by using a bus or in another manner, and a connection by using a bus is used as an example in  FIG. 22 . 
     1. When the device  2200  is used as a STA for pseudo access, in another embodiment of the STA in this embodiment of the present invention, the processor  2203  is configured to perform the following steps by invoking an operation instruction stored in the memory  2204 : 
     finding an access point AP supporting pseudo access, where the STA is not an authorized user of the AP, and the pseudo access is used for enabling an unauthorized user that accesses the AP to send a scheduling-related management frame to the AP and accept scheduling management by the AP; 
     sending pseudo access information to the AP, where the pseudo access information is used by the AP to determine that access initiated by the STA is pseudo access; and 
     establishing a pseudo access association with the AP, so that the STA can send a scheduling-related management frame to the AP and accept scheduling management by the AP. 
     In some embodiments of the present invention, when performing the step of sending pseudo access information to the AP, the processor  2203  specifically performs the following step: 
     sending a pseudo access association request message to the AP, where the pseudo association request message is used for initiating a pseudo access association request to the AP, and includes an information indication indicating the pseudo access information; and 
     before performing the step of establishing a pseudo access association with the AP, the processor is further configured to perform the following step: 
     receiving a pseudo access association response message sent by the AP, where the pseudo access association response message is a response to the pseudo access association request message, and is used for determining that the AP accepts the pseudo access association request sent by the STA. 
     In some embodiments of the present invention, when performing the step of sending pseudo access information to the AP, the processor  2203  specifically performs the following step: 
     sending a pseudo access authentication request message to the AP, where the pseudo access authentication request message is used for initiating a pseudo access authentication request to the AP, and includes an authentication type parameter indicating the pseudo access information; and 
     before performing the step of establishing a pseudo access association with the AP, the processor is further configured to perform the following step: 
     receiving a pseudo access authentication response message sent by the AP, where the pseudo access authentication response message is a response to the pseudo access authentication request message, and is used for determining that the AP accepts the pseudo access authentication request sent by the SAT. 
     In some embodiments of the present invention, when performing the step of finding an access point AP supporting pseudo access, the processor  2203  specifically performs the following steps: 
     listening for a broadcast frame that is sent by an AP and that can be received; and 
     when a broadcast frame that is sent by a first AP and that is obtained by listening indicates that the first AP supports pseudo access, determining that the first AP is the AP supporting pseudo access. 
     In some embodiments of the present invention, when performing the step of finding an access point AP supporting pseudo access, the processor  2203  specifically performs the following steps: 
     sending a probe request frame including information indicating that an AP supporting pseudo access is searched for; and 
     receiving a probe response frame sent by a second AP, where the probe response frame indicates that the second AP is the AP supporting pseudo access. 
     2. When the device  2200  is used as an AP for pseudo access, in another embodiment of the AP in this embodiment of the present invention, the processor  2203  is configured to perform the following steps by invoking an operation instruction stored in the memory  2204 : 
     receiving pseudo access information sent by a STA, where the pseudo access information is used for enabling the AP to determine that access initiated by the STA is pseudo access, the STA is not an authorized user of the AP, the AP supports pseudo access, and the pseudo access is used for enabling an unauthorized user that accesses the AP to send a scheduling-related management frame to the AP and accept scheduling management by the AP; and 
     establishing a pseudo access association with the STA, so that the AP can receive a scheduling-related management frame sent by the STA and perform scheduling management on the STA. 
     In some embodiments of the present invention, when performing the step of receiving pseudo access information sent by a STA, the processor  2203  specifically performs the following step: 
     receiving a pseudo access association request message sent by the STA, where the pseudo association request message is used for initiating a pseudo access association request to the AP, and includes an information indication indicating the pseudo access information; and 
     before performing the step of establishing a pseudo access association with the STA, the processor  2203  further performs the following step: 
     sending a pseudo access association response message to the STA, where the pseudo access association response message is a response to the pseudo access association request message, and is used for determining that the AP accepts the pseudo access association request sent by the STA. 
     In some embodiments of the present invention, when performing the step of receiving pseudo access information sent by a STA, the processor  2203  specifically performs the following step: 
     receiving a pseudo access authentication request message sent by the STA, where the pseudo access authentication request message is used for initiating a pseudo access authentication request to the AP, and includes an authentication type parameter indicating the pseudo access information; and 
     before performing the step of establishing a pseudo access association with the STA, the processor  2203  further performs the following step: 
     sending a pseudo access authentication response message to the STA, where the pseudo access authentication response message is a response to the pseudo access authentication request message, and is used for determining that the AP accepts the pseudo access authentication request sent by the SAT. 
     In some embodiments of the present invention, before performing the step of receiving pseudo access information sent by a STA, the processor  2203  is further configured to perform the following step: 
     sending a broadcast frame, and indicating, in the broadcast frame, that the AP supports pseudo access. 
     In some embodiments of the present invention, before performing the step of receiving pseudo access information sent by a STA, the processor  2203  is further configured to perform the following step: 
     receiving a probe request frame sent by the STA, where the probe request frame carries information indicating that an AP supporting pseudo access is searched for; and 
     sending a probe response frame to the STA, where the probe response frame indicates that the AP supports pseudo access. 
     3. When the device  2200  is used as a STA for direct connection scheduling for pseudo access, in another embodiment of the STA in this embodiment of the present invention, the processor  2203  is configured to perform the following steps by invoking an operation instruction stored in the memory  2204 : 
     establishing a P2P connection to a second STA; 
     establishing, a pseudo access association with an AP supporting pseudo access, wherein the AP is the same one as that the second STA has established or will establish a pseudo access association with, where the first STA and the second STA are not authorized users of the AP; 
     establishing a direct connection to the second STA by using the AP; and 
     accepting direct connection scheduling by the AP along with the second STA. 
     In some embodiments of the present invention, when performing the step of establishing, a pseudo access association with an AP supporting pseudo access, wherein the second STA has established or will establish a pseudo access association with the same AP, the processor  2203  is specifically configured to perform the following steps: 
     finding the AP supporting pseudo access; 
     notifying the second STA of an identifier of the found AP by using the P2P connection; and 
     establishing, a pseudo access association with the AP, wherein the second STA has established or will establish a pseudo access association with the same AP. 
     In some embodiments of the present invention, when performing the step of establishing a direct connection to the second STA by using the AP, the processor  2203  is specifically configured to perform the following steps: 
     initiating a direct connection request to the AP, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA; and 
     receiving a direct connection response returned by the AP, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
     In some embodiments of the present invention, when performing the step of accepting direct connection scheduling by the AP along with the second STA, the processor  2203  is specifically configured to perform the following steps: 
     requesting a direct connection transport stream from the AP, to notify the AP of a resource requirement of direct communication between the first STA and the second STA; and 
     performing direct communication with the second STA on a direct connection transport stream allocated by the AP. 
     In some embodiments of the present invention, when performing the step of performing direct communication with the second STA on a direct connection transport stream allocated by the AP, the processor  2203  is specifically configured to perform the following step: 
     performing direct communication with the second STA on the direct connection transport stream allocated by the AP, and providing protection by using a key of the P2P connection. 
     4. When the device  2200  is used as an AP for direct connection scheduling for pseudo access, in another embodiment of the AP in this embodiment of the present invention, the processor  2203  is configured to perform the following steps by invoking an operation instruction stored in the memory  2204 : 
     establishing a pseudo access association with each of a first STA and a second STA, where the AP supports pseudo access, the first STA and the second STA are not authorized users of the AP, and a P2P connection is already established between the first STA and the second STA; 
     establishing a direct connection between the first STA and the second STA; and 
     performing direct connection scheduling on the first STA and the second STA. 
     In some embodiments of the present invention, when performing the step of establishing a direct connection between the first STA and the second STA, the processor  2203  is specifically configured to perform the following steps: 
     receiving a direct connection request initiated by the first STA, where the direct connection request is used for requesting to establish a direct connection between the first STA and the second STA; and 
     establishing a direct connection between the first STA and the second STA according to the direct connection request, and returning a direct connection response to the first STA, where the direct connection response is used for notifying the first STA that the requested direct connection is already established successfully. 
     In some embodiments of the present invention, when performing the step of performing direct connection scheduling on the first STA and the second STA, the processor  2203  is specifically configured to perform the following steps: 
     receiving a request of the first STA for a direct connection transport stream, to obtain a resource requirement of direct communication between the first STA and the second STA; and 
     allocating a direct connection transport stream for the first STA to perform direct communication with the second STA. 
     It may be clearly understood by persons skilled in the art that, for the purpose of convenient and brief description, for a detailed working process of the foregoing system, apparatus, and unit, reference may be made to a corresponding process in the foregoing method embodiments, and details are not described herein. 
     In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the described apparatus embodiment is merely an example. For example, the unit division is merely logical function division and may be other division in actual implementation. For example, a plurality of units or components maybe combined or integrated into another system, or some features may be ignored or not performed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections may be implemented through some interfaces, indirect couplings or communication connections between the apparatuses or units, or electrical connections, mechanical connections, or connections in other forms. 
     The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, maybe located in one position, or may be distributed on a plurality of network units . Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments. 
     In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in a form of hardware, or may be implemented in a form of a software functional unit. 
     When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, the integrated unit may be stored in a computer-readable storage medium. Based on such an understanding, the technical solutions of the present invention essentially, or the part contributing to the prior art, or all or some of the technical solutions maybe implemented in the form of a software product. The software product is stored in a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, a server, or a network device) to perform all or some of the steps of the methods described in the embodiments of the present invention. The foregoing storage medium includes: any medium that can store program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc. 
     The foregoing embodiments are merely intended for describing the technical solutions of the present invention, but not for limiting the present invention. Although the present invention is described in detail with reference to the foregoing embodiments, persons of ordinary skill in the art should understand that they may still make modifications to the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features thereof, without departing from the spirit and scope of the technical solutions of the embodiments of the present invention.