Abstract: A a plant composite corrosion inhibitor for an oil field and a preparation method thereof belong to the technical field of preparation of oil field chemical agents. The plant composite corrosion inhibitor comprises a first plant ingredient, a second plant ingredient, a corrosion inhibition synergist and an organic solvent. The first plant ingredient is zeaxanthin and a derivative thereof obtained by supercritical CO2 extraction of marigold; the second plant ingredient is prepared from luffa leaves, guava leaves and eclipta according to a mass ratio of 5:8:9; the corrosion inhibition synergist is prepared by mixing potassium iodide, 8-hydroxyquinoline and sodium dodecyl benzene sulfonate according to a mass ratio of 3:4:2; and the organic solvent is ethanol with a mass concentration of 82%. The composite corrosion inhibitor has a good corrosion inhibition effect, and reduces harmful chemical ingredients in the corrosion inhibitor.

Abstract: Embodiments provide a method for accessing a wireless local area network, a station, and an access point. The method includes: receiving, by a station, a beacon or a probe response from an access point, where the beacon or the probe response carries configuration version information; and executing, by the station, a GAS query according to the configuration version information carried in the beacon or the probe response. In embodiments, the access point sends the configuration version information to the station, so that the station executes the GAS query according to the configuration version information.

Abstract: Embodiments provide a method for accessing a wireless local area network, a station, and an access point. The method includes: receiving, by a station, a beacon or a probe response from an access point, where the beacon or the probe response carries configuration version information; and executing, by the station, a GAS query according to the configuration version information carried in the beacon or the probe response. In embodiments, the access point sends the configuration version information to the station, so that the station executes the GAS query according to the configuration version information.

Abstract: A data feedback method includes acquiring, by the beamformee, the number of columns from a null data packet announcement (NDPA) message; detecting the number of active first spatial streams; comparing the number of first spatial streams with the number of columns, and taking the smaller value obtained from the comparison as the number of second spatial streams required for feedback; and feeding back the number of second spatial streams and spatial stream measurement information about the second spatial streams to the beamformer.

Abstract: Embodiments of the present invention provide a method for accessing a wireless local area network, a station, and an access point. The method includes: receiving, by a station, a beacon or a probe response from an access point, where the beacon or the probe response carries configuration version information; and executing, by the station, a GAS query according to the configuration version information carried in the beacon or the probe response. In the embodiments of the present invention, the access point sends the configuration version information to the station, so that the station executes the GAS query according to the configuration version information, thereby improving access efficiency.

Abstract: A data feedback method includes acquiring, by the beamformee, the number of columns from a null data packet announcement (NDPA) message; detecting the number of active first spatial streams; comparing the number of first spatial streams with the number of columns, and taking the smaller value obtained from the comparison as the number of second spatial streams required for feedback; and feeding back the number of second spatial streams and spatial stream measurement information about the second spatial streams to the beamformer.

Abstract: Embodiments of the present invention provide a feedback method for active scanning of a user terminal and an access point, and relate to the field of communications, where a timer is set in the access point, and after the timer reaches preset time, buffered probe response message can be cleared, thereby further reducing an overhead of channel resources. The feedback method includes: receiving a probe request message from a user terminal, where the probe request message includes scanning time preset by the user terminal; generating and buffering a probe response message of the probe request message; setting and starting a timer corresponding to the user terminal according to the received scanning time preset by the user terminal; and clearing the buffered probe response message after determining that the timer reaches the preset scanning time and the probe response message is not sent to the user terminal.

Abstract: Embodiments of the present invention disclose a method, apparatus, and system for measurement for D2D communication, used to reduce blindness of measurement in a mechanism of D2D communication between terminals.

Abstract: Embodiments of the present invention disclose a method, apparatus, and system for measurement for D2D communication, used to reduce blindness of measurement in a mechanism of D2D communication between terminals.

Abstract: An embodiment of the present invention provides a method, comprising using optimized neighbor graphs for low-power access point assisted fast wireless roaming by a wireless station (STA) operating in a wireless network.

Abstract: Techniques are described that provide load balancing in wireless networks. For instance, a device (e.g., a first access point) may receive one or more current operational characteristics for each of one or more neighbor APs. Also, the first AP may determine a received signal strength for each of these neighbor AP(s). In turn, the first AP selects one or more reportable neighbor APs from these neighbor APs. Further, the first AP transmits a beacon. This beacon includes, for each reportable neighbor AP, the corresponding one or more current operational characteristics and the corresponding received signal strength.

Abstract: Embodiments of the present invention provide a feedback method for active scanning of a user terminal and an access point, and relate to the field of communications, where a timer is set in the access point, and after the timer reaches preset time, buffered probe response message can be cleared, thereby further reducing an overhead of channel resources. The feedback method includes: receiving a probe request message from a user terminal, where the probe request message includes scanning time preset by the user terminal; generating and buffering a probe response message of the probe request message; setting and starting a timer corresponding to the user terminal according to the received scanning time preset by the user terminal; and clearing the buffered probe response message after determining that the timer reaches the preset scanning time and the probe response message is not sent to the user terminal.

Abstract: A system, method and device may include triggering a direct connection setup based on one or more communication parameters communicated with a mobile device via a fixed device. It may be determined whether the mobile device is a peer. The quality of service with the mobile device via the fixed device may be compared with quality of service of a mobile device via a direct link. A channel for the direct link may be selected and information may be sent to the mobile device over the direct link via the channel.

Abstract: Embodiments of the present invention provide a method for accessing a wireless local area network, a station, and an access point. The method includes: receiving, by a station, a beacon or a probe response from an access point, where the beacon or the probe response carries configuration version information; and executing, by the station, a GAS query according to the configuration version information carried in the beacon or the probe response. In the embodiments of the present invention, the access point sends the configuration version information to the station, so that the station executes the GAS query according to the configuration version information, thereby improving access efficiency.

Abstract: Apparatuses and methods for security profile update are presented. In one embodiment, the method comprises determining the version of a security profile associated with a wireless client and determining whether a new security profile exists. The method includes calculating a one-time password based at least on a random character table and some image areas within an image. The method further includes generating an encrypted version of the new security profile by using a first part of the one-time password as an encryption key and sending to the wireless client a profile update request.

Abstract: A data feedback method includes acquiring, by the beamformee, the number of columns from the NDPA message; detecting the number of active first spatial streams; comparing the number of first spatial streams with the number of columns, and taking the smaller value obtained from the comparison as the number of second spatial streams required for feedback; and feeding back the number of second spatial streams and spatial stream measurement information about the second spatial streams to the beamformer.

Abstract: Apparatuses and methods for security profile update are presented. In one embodiment, the method comprises determining the version of a security profile associated with a wireless client and determining whether a new security profile exists. The method includes calculating a one-time password based at least on a random character table and some image areas within an image. The method further includes generating an encrypted version of the new security profile by using a first part of the one-time password as an encryption key and sending to the wireless client a profile update request.

Abstract: A method to generate a pairwise master key for use in establishing a wireless connection is presented. In one embodiment, the method comprises determining a region in an image. The method further comprises generating the pairwise master key based at least on contents of the region in the image.

Abstract: A technique for allowing client-driven profile updates in a wireless network uses a shared character password and a shared image that is known by both a client device and a network server. In some embodiments, a random character table is generated by a client device and is used, along with the shared character password and shared image, to calculate a one-time password (OTP). The OTP is then used to both encrypt and sign a new security profile to be delivered to the network server in a profile update request. The server may then generate the same OTP using information within the request and the shared character password and shared image. The new profile may then be decrypted and validated within the server.

Abstract: A technique for allowing client-driven profile updates in a wireless network uses a shared character password and a shared image that is known by both a client device and a network server. In some embodiments, a random character table is generated by a client device and is used, along with the shared character password and shared image, to calculate a one-time password (OTP). The OTP is then used to both encrypt and sign a new security profile to be delivered to the network server in a profile update request. The server may then generate the same OTP using information within the request and the shared character password and shared image. The new profile may then be decrypted and validated within the server.