Abstract: A data communications method, apparatus, and system are provided. The method includes: sending an association request message to an access point; receiving an association response message sent by the access point, where the association response message includes an association identifier; generating a data frame, where a format of the data frame is a simplified frame format, and a frame header of the data frame includes a source address and a destination address, where the length of the source address is shorter than the length of a Media Access Control (MAC) address, and the source address includes the association identifier, the association identifier and a multicast unicast indicator, the association identifier and a data type, or the association identifier, the data type, and the multicast unicast indicator; and sending the data frame to the access point.

Abstract: Embodiments of the present invention disclose 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. The method in the embodiments of the present invention includes: after finding an AP supporting pseudo access, sending, by a STA, pseudo access information to the AP, and establishing 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.

Abstract: In a process for a wireless network device in a first Neighbor Awareness Network device cluster (NAN cluster) to join a second NAN cluster, the wireless network device first discovers the second NAN cluster. It calculates a first score based on multiple pieces of attribute information of the first NAN cluster, and a second score based on multiple pieces of attribute information of the second NAN cluster, compares the first score and the second score, and determines to join the second NAN cluster when the second score is greater than the first score. Then it sends an event message to other wireless network devices in the first NAN cluster to inform them to join the second NAN cluster, stops participating in the first NAN Cluster by not contending for serving as a synchronization device in the first NAN Cluster, and joins the second NAN cluster.

Abstract: A packet processing method, apparatus, and system. A first node receives a first packet sent by a relay device, where the first packet includes data in a second packet sent by a second node to the relay device, the data in the second packet is encrypted by using second additional authentication data and a session key between the first node and the second node, and the second additional authentication data is generated by the second node according to at least address information in a packet header of the second packet by using a second rule; the first node generates first additional authentication data according to address information in a packet header of the first packet by using a first rule, and decrypts the data in the first packet by using the first additional authentication data and the session key.

Abstract: Embodiments of the present invention provide an information query method and device, which can reduce a waste of resources in an information query process, and decrease power consumption. The method includes: sending, by a requesting device in a broadcast manner, a first query request message, where the first query request message carries a first query condition and information about a group identity; and when the requesting device receives a first query response message sent by a responding device that meets the first query condition, sending, by the requesting device, a second query request message that uses the group identity as a receiving address, so that the responding device processes the second query request message.

Abstract: Embodiments of the present invention disclose a method and an apparatus for acknowledging transmission of downlink data frames by multiple stations in a wireless local area network. The method includes: sending, by an access point, a corresponding downlink data frame to each station of the multiple stations; and receiving, by the access point after the access point sends the corresponding downlink data frame to each station, acknowledgment messages concurrently sent by the multiple stations on channel resources allocated by the access point to the multiple stations. According to the method and the apparatus provided in the embodiments of the present invention, time required by the multiple stations to feed back the acknowledgment messages can be reduced.

Abstract: A method includes: after receiving an operation instruction of a first user, generating, by a first device, connection information according to the operation instruction, and providing the connection information to a second device near the first device, so that the second device obtains a first identifier through calculation according to a first information portion of the connection information by using a preset algorithm; receiving a first message that is sent by the second device according to the connection information, where the first message carries the first identifier; determining whether the first identifier matches a second identifier of the first device, where the second identifier is equal to or corresponds to a result that is generated through calculation according to the first information portion; if the first identifier matches the second identifier, sending a second message to the second device; and establishing a wireless connection to the second device.

Abstract: This application provides a screen sharing method, a sharing device, and a receiving device. The screen sharing method includes: displaying a user interface of an application menu; establishing a connection used for screen sharing to a receiving device; determining shareable image data, where the shareable image data is a part of image data corresponding to the user interface; and sending the shareable image data to the receiving device by using the connection, so that the receiving device displays the user interface of the application menu according to the shareable image data. When this embodiment is used for screen sharing, a sharing device may send shareable image data to only a receiving device, thereby decreasing security problems caused by screen sharing.

Abstract: A security authentication method, device, and system are provided. A first device and a second device perform security authentication by using a first mapping key and a second mapping key, where the first mapping key is generated according to an initial key of the first device and a first predetermined algorithm, the second mapping key is generated according to an initial key of the second device and the first predetermined algorithm. A device in embodiments of the present invention performs security authentication by using a mapped initial key, which can increase the difficulty for an attacker to acquire a key, thereby improving security of a wireless network connection.

Abstract: A method for establishing a connection by a terminal, an apparatus, and a system, where the method includes acquiring, by a first wireless terminal, a first media access control (MAC) address of a second wireless terminal, sending, by the first wireless terminal, a first message carrying identifier information such that the second wireless terminal receives the first message carrying the identifier information and verifies the identifier information, where the identifier information is obtained by the first wireless terminal according to at least the first MAC address, receiving, by the first wireless terminal, a first response message that is sent by the second wireless terminal and that carries a second MAC address of the second wireless terminal, and establishing, by the first wireless terminal, a connection to the second wireless terminal according to the second MAC address.

Abstract: A direct link scheduling method implemented by an access point (AP) includes: multicasting or broadcasting information about multiple direct links participating in a next direct link scheduled period; obtaining, in the direct link scheduled period, sounding results sent by the both terminal devices on each of the multiple direct links, and separately allocating channel resources to the multiple direct links according to the sounding results in the direct link scheduled period; and/or sub-channels or transmission time in channel resources of two direct links interfering with each other are or is different; and sending information about the allocated channel resource to the both terminal devices on each of the multiple direct links. The embodiments of the present invention can avoid channel contention between different direct links and reduce a probability that a conflict occurs because of the channel contention.

Abstract: A method implemented in an access point (AP) includes sending first communication address change information to a station to notify the station of a communication address which is to be used by the AP after the AP changes a communication address, the first communication address change information includes at least a third communication address, and the third communication address is the communication address which is to be used by the AP after the AP changes the communication address; determining a fourth communication address, where the fourth communication address is a communication address which is to be used by the station after the station changes a communication address; and switching the communication address from a first communication address to the third communication address, and using the third communication address to communicate with the station whose communication address is switched from a second communication address to the fourth communication address.

Abstract: The present invention discloses a service processing method and apparatus, which belong to the field of Internet technologies. After the AP and an STA first perform MAC address change notification and then establish a first MAC connection, the AP sends service data of the STA to the STA through the first MAC connection by using a resource related to a second MAC connection. Therefore, in a MAC address change process, there is no need to re-establish a resource at an upper layer of a MAC layer, and only a change in invoking a MAC layer resource is required at a layer at which the MAC layer resource is used. Time and a resource for processing a service can be reduced without affecting service continuity and stability of the upper layer. Therefore, the service is processed in a timely manner and service processing efficiency is improved.

Abstract: A secure connection method for a network device includes: acquiring a public key operation value of a second device in an out-of-band manner; sending public key information of a first device to the second device; receiving public key information of the second device that is sent by the second device, and decrypting the public key information of the second device by using a private key of the first device, to obtain the public key of the second device; and performing a preset-algorithm operation on the public key of the second device to obtain a copy of the public key operation value of the second device, and after the copy of the public key operation value of the second device matches the public key operation value of the second device, accepting received connection information sent by the second device.

Abstract: An indoor positioning method includes: sending, by a client, a position request instruction to at least three access points; receiving, by the client, a response message sent by each access point in response to the request instruction; sending, by the client, a corresponding measurement report message to each access point, so that each access point obtains a radio signal flight time between itself and the client; and receiving, by the client, a position estimation result from a network side, where the network side performs a comparative calculation on the radio signal flight time received from each access point and a sampling time measured in advance between each access point and each of multiple sampling points, and the position estimation result is an obtained coordinate location of a sampling point whose corresponding sampling time has a minimum time difference from the radio signal flight time received from each access point.

Abstract: Embodiments provide a service discovery method. The method includes a first device, using an access point, sending a service discovery request to at least one second device connected to the access point, where the service discovery request is used to query, from the at least one second device, a service that the first device requests to query. The method also includes the first device receiving a service discovery response sent by the at least one second device, where the service discovery response is a response of the at least one second device to the service discovery request, and the service discovery response includes a service supported by the at least one second device.

Abstract: A method includes: securely obtaining, by a first device, a first public key estimated value of a second device in an out-of-band manner; encrypting an asymmetric encryption public key by using the first public key estimated value; sending the encrypted asymmetric encryption public key to the second device; receiving an encrypted first key-exchange public key sent by the second device; decrypting the encrypted first key-exchange public key by using an asymmetric encryption private key; performing an operation based on the decrypted first key-exchange public key, to obtain a second public key estimated value; and when the first public key estimated value is consistent with the second public key estimated value, determining that the decrypted first key-exchange public key is correct, generating a shared key by using a key-exchange private key and the first key-exchange public key, and establishing a secure connection to the second device by using the shared key.

Abstract: A method for allocating an addressing identifier includes: notifying, by an access point, at least two stations of an encrypted new MAC address that corresponds to each station, and indicating a predetermined update condition, so that the at least two stations update respective MAC addresses to the respective new MAC addresses when the predetermined update condition is met; and when the predetermined update condition is met, updating, by the access point, the MAC addresses of the at least two stations to the new MAC addresses that correspond to the stations, so that when a message is subsequently received from the stations or sent to the stations, the new MAC addresses are used as the MAC addresses of the stations. In the foregoing manner, the present invention can prevent an eavesdropper from tracing, by using a MAC address, a terminal to acquire user privacy, ensuring security of the user privacy.

Abstract: A network configuration method, including acquiring a public key operation value of a second device in an out-of-band manner, acquiring a public key copy of the second device that is sent by the second device and that is used to perform key exchange, performing an operation of the preset algorithm on the public key copy of the second device, to obtain a public key operation value copy of the second device, and generating a first exchange key according to a private key that is used by the first device to perform key exchange and the acquired public key copy of the second device after the public key operation value copy of the second device matches the public key operation value of the second device, and hence the method simplifies a network configuration process.

Abstract: Embodiments of the present invention provide an information query method and device, which can reduce a waste of resources in an information query process, and decrease power consumption. The method includes: sending, by a requesting device in a broadcast manner, a first query request message, where the first query request message carries a first query condition and information about a group identity; and when the requesting device receives a first query response message sent by a responding device that meets the first query condition, sending, by the requesting device, a second query request message that uses the group identity as a receiving address, so that the responding device processes the second query request message.