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 by means of scanning for networking signals from the second NAN cluster. If it determines, based on the discovery information, to join the second NAN cluster, the wireless network device sends an event message to other wireless network devices in the first NAN cluster to inform them that it is leaving the first NAN cluster to join the second NAN cluster. The event message also contains a cluster ID (CID) of the second NAN cluster. The wireless network device then leaves the first NAN cluster and joins the second NAN cluster.
Abstract:
The present invention provides a data transmission method and apparatus. The method includes: sending, by an access point, channel opportunity information, so that stations that have data to be sent randomly select, after receiving the channel opportunity information, a channel opportunity from the channel opportunity information, and concurrently send a sending request message to the access point; allocating, by the access point according to the received sending request message, to a station that sends the received sending request message, a channel resource that is used for sending uplink data; and sending, by the access point according to the allocated channel resource, a sending acknowledgement message to the station that sends the received sending request message, so that stations that receive the sending acknowledgement message use channel resources to concurrently send uplink data. Therefore, a synchronization requirement that multiple stations use different subcarriers to concurrently send data can be well met.
Abstract:
Embodiments of the present invention disclose a service advertisement message transmission method and device. The method in the embodiments of the present invention includes: generating, by a first device, a first service advertisement message, where the first service advertisement message includes first service information of the first device and second service information of a second device; the second service information is obtained by the first device from a received message sent by the second device; the first service information is used to enable a device in a communication range of the first device to learn service information of the first device; and the second service information is used to enable a device in a communication range of the second device to learn service information of the second device; and sending, by the first device, the first service advertisement message.
Abstract:
A resource reservation method applied to a WiFi system includes: receiving, by a destination node, a resource reservation request sent by a source node, and sending a resource reservation response to the source node, where the resource reservation response includes a reservation time, and the resource reservation response is used to enable another node, which can monitor the resource reservation response, in the WiFi system to set a network allocation vector of the another node according to the reservation time; determining, by the destination node, whether data sent by the source node is received within a predetermined time; and if the data is not received, sending a resource release instruction, so that the another node initializes the network allocation vector of the another node, and re-contends for a resource, thereby solving a hidden node problem and also ensuring that a network resource is fully and properly used.
Abstract:
A method includes: receiving, on a first channel by an access point, a request message sent by a station, where the request message includes first indication information used for indicating that the station is a first type station supporting channel information indicated by the access point, and the first channel is a minimum channel unit; and sending, a confirmation message to the station according to the request message, where the confirmation message includes channel information used for communication between the access point and the station, and the channel information includes at least the first channel. After an access point allocates a channel resource to all stations in a centralized manner according to the channel resource and types of the stations in a same BSS, the access point may send a confirmation message to a station, to instruct the access point and the station to communicate on an indicated channel resource.
Abstract:
The present invention discloses a data transmission method and device. The method includes: receiving, by a device in a first BSS, a data frame sent by a device in a second BSS, where the data frame sent by the device in the second BSS includes a Preamble sequence and a MAC frame; transmit power of the Preamble sequence is first power; transmit power of the MAC frame is second power; and the first power is higher than the second power; if the data frame received by the device in the first BSS includes the Preamble sequence but does not include the MAC frame, setting a NAV value according to a SIG field in the Preamble sequence; and transmitting data according to the NAV value.