Abstract: This disclosure provides a method and device for access authentication in wireless communication. The method performed by a first device includes: transmitting, to a second device, a first message for initiating a handshake process between the first device and the second device, wherein the first message at least includes a first key generation parameter of the first device; receiving, from the second device, a second message as a response to the first message, wherein the second message at least includes a second key generation parameter of the second device and a checking parameter generated by the second device at least based on the first key generation parameter and the second key generation parameter; and transmitting, to the second device, a third message for confirming a success of the handshake process, in response to verifying the checking parameter of the second message.

Abstract: A first access point (AP) device including one or more processors; a memory coupled to at least one of the processors; and a set of computer program instructions stored in the memory, which, when executed by at least one of the processors, cause the first AP device to perform operations of: receiving, from a second AP device to which a client device is being connected, a first context of the connection between the second AP device and the client device, wherein the first context indicates a next data frame and an amount of buffered data frames to be transmitted by the second AP device; and transmitting, to the client device, data frames starting from a data frame with a first sequence number (SN) based on a SN of the next data frame and the amount of buffered data frames.

Abstract: A recipient Multi-Link Device (MLD) including one or more processors; a memory coupled to at least one of the processors; and a set of computer program instructions stored in the memory, which, when executed by at least one of the processors, perform actions of: receiving, from an originator MLD, an indication for indicating a MLD Block Acknowledgment (BA) scheme; and delivering, in response to the HOL support indication indicating a diversity MLD BA scheme of transmitting duplicated sets of data frames on multiple links established between the recipient and originator MLDs, received data frames of a plurality of data frames from a first layer to a second layer of the recipient MLD according to the diversity MLD BA scheme, wherein the second layer is higher than the first layer.

Abstract: This disclosure provides an access point (AP) and a terminal and a communication method performed by the access point and terminal. The AP can be a first AP, including: a transmitter, configured to transmit a first request for requesting the terminal to re-associate with the first AP, and a receiver, configured to receive a first response which is in response to the first request, wherein the first response indicates that the re-association of the terminal with the first AP succeeds.

Abstract: A gamma fusion computing method based on gamma probe parameters includes: acquiring measurement values of two gamma probes in one continuous rotation period, and utilizing a mean value and a variance of the measurement values in the one rotation period as an evaluation reference value of each gamma probe; determining whether the gamma probes are abnormal, if the two gamma probes are both normal, utilizing the weight values to perform weight fusion on the measured values measured by two gamma probes, and if there is a gamma probe that is abnormal, then multiplying the average of the measured values of the normal gamma probe in the rotation period by 2 as a gamma output value for output.

Abstract: This disclosure provides a method and access point (AP) for sharing a transmission opportunity (TXOP). The method includes: determining a bandwidth resource of a frequency band which is not to be used by the first AP for a first time period of the TXOP of the frequency band, and transmitting a signal for announcing the bandwidth resource not to be used by the first AP for the first time period, wherein the signal indicates a delay requirement for one or more second APs to determine whether to contend for the bandwidth resource.

Abstract: The present disclosure provides a method and an AP for sharing a transmission opportunity (TXOP). A sharing access point (AP) according to the embodiment of the present disclosure includes a transmitter configured to transmit a first trigger frame for announcing a transmission opportunity (TXOP) to be shared; a receiver configured to receive responses from a plurality of candidate shared APs, wherein each response corresponds to one of the plurality of candidate shared APs, and includes information on interferential APs of the one of the plurality of candidate shared APs; a processor configured to determine one or more shared APs from the plurality of candidate shared APs based on the responses; and the transmitter further configured to transmit a second trigger frame which includes identity (ID) information of the one or more shared APs.

Abstract: This disclosure provides a method for transmission opportunity (TXOP) sharing by a sharing access point (AP), a method for TXOP sharing by a shared AP, a sharing AP, a shared AP, a non-transitory computer readable medium and a computer program product. The method includes: transmitting, to at least one candidate shared AP, a first message indicating that a TXOP owned by the sharing AP is sharable; receiving one or more second messages respectively from one or more shared APs of the at least one candidate shared AP, wherein each of the one or more second messages indicates resource requirement information of one of the one or more shared APs; and performing resource allocation for the TXOP to the one or more shared APs based on an available channel resource of the sharing AP and the resource requirement information of the one or more shared APs.

Abstract: This disclosure provides a method for channel state feedback in a non-simultaneous transmit and receive (NSTR) operation mode and the communication device thereof. The method implemented in a first communication device, the first communication device being configured with a plurality of links for communicating with a second communication device, the method including: receiving first data over a channel of a first link of the plurality of links; determining whether a channel of a second link of the plurality of links is idle in a case that no data is received over the channel of the second link and the first link and the second link belong to a non-simultaneous transmit and receive (NSTR) link pair; and transmitting a feedback frame over the channel of the first link, wherein the feedback frame includes a first field indicating whether the channel of the second link is idle.

Abstract: This disclosure provides a backoff counting method in a non-simultaneous transmit and receive (NSTR) operation mode and the communication device for the method. The method includes: configuring a plurality of backoff counters for counting backoff slots with no medium activity of channels of the plurality of links; synchronizing a count value of a first backoff counter of the plurality of backoff counters with a count value of a second backoff counter of the plurality of backoff counters, if the first backoff counter starts counting later than the second backoff counter or resumes counting after a pause, wherein the count value of the second backoff counter is smaller than that of the first backoff counter; and transmitting or receiving a signal on a channel of at least one of the plurality of links after all the backoff counters reach a predefined value.

Abstract: This disclosure provides a method for channel state feedback in a non-simultaneous transmit and receive (NSTR) operation mode and the communication device thereof. The method implemented in a first communication device, the first communication device being configured with a plurality of links for communicating with a second communication device, the method including: receiving first data over a channel of a first link of the plurality of links; determining whether a channel of a second link of the plurality of links is idle in a case that no data is received over the channel of the second link and the first link and the second link belong to a non-simultaneous transmit and receive (NSTR) link pair; and transmitting a feedback frame over the channel of the first link, wherein the feedback frame includes a first field indicating whether the channel of the second link is idle.

Abstract: This disclosure provides a backoff counting method in a non-simultaneous transmit and receive (NSTR) operation mode and the communication device for the method. The method includes: configuring a plurality of backoff counters for counting backoff slots with no medium activity of channels of the plurality of links; synchronizing a count value of a first backoff counter of the plurality of backoff counters with a count value of a second backoff counter of the plurality of backoff counters, if the first backoff counter starts counting later than the second backoff counter or resumes counting after a pause, wherein the count value of the second backoff counter is smaller than that of the first backoff counter; and transmitting or receiving a signal on a channel of at least one of the plurality of links after all the backoff counters reach a predefined value.

Abstract: A gamma fusion computing method based on gamma probe parameters is provided, which relates to the technical field of oil drilling equipment while drilling, including: acquiring measurement values of two gamma probes in one continuous rotation period, and utilizing a mean value and a variance of the measurement values in the one rotation period as an evaluation reference value of each gamma probe; determining whether the gamma probes are abnormal, if the two gamma probes are both normal, utilizing the weight values to perform weight fusion on the measured values measured by two gamma probes, and if there is a gamma probe that is abnormal, then multiplying the average of the measured values of the normal gamma probe in the rotation period by 2 as a gamma output value for output. The gamma fusion computing method is capable of accurately determine the abnormal conditions of the gamma probes and effectively resolve the abnormal output.

Abstract: The present invention relates to the well drilling field in petrochemical industry, and discloses a drilling fluid additive composition comprising a nano-plugging agent, a bionic wall bracing agent, a bionic shale inhibitor, an emulsifier, and an amphiphobic wettability reversal agent, wherein, the nano-plugging agent is modified silicon dioxide nano-particle, and its modifying group includes a modifying copolymer chain; the bionic wall bracing agent is carboxymethyl chitosan with a dopamine-derived group grafted on its main chain; the bionic shale inhibitor is composed of structural units of arginine and structural units of lysine; and the amphiphobic wettability reversal agent is a dual-cation fluorocarbon surfactant. The present invention further provides a pseudo oil-based drilling fluid suitable for horizontal shale gas wells containing the above composition.

Abstract: The present invention relates to the well drilling field in petrochemical industry, and discloses a drilling fluid additive composition comprising a nano-plugging agent, a bionic wall bracing agent, a bionic shale inhibitor, an emulsifier, and an amphiphobic wettability reversal agent, wherein, the nano-plugging agent is modified silicon dioxide nano-particle, and its modifying group includes a modifying copolymer chain; the bionic wall bracing agent is carboxymethyl chitosan with a dopamine-derived group grafted on its main chain; the bionic shale inhibitor is composed of structural units of arginine and structural units of lysine; and the amphiphobic wettability reversal agent is a dual-cation fluorocarbon surfactant. The present invention further provides a pseudo oil-based drilling fluid suitable for horizontal shale gas wells containing the above composition.

Abstract: The present invention relates to the well drilling field in petrochemical industry, and discloses a high-density water-based drilling fluid suitable for horizontal shale gas wells comprising a nano-plugging agent, a bionic wall bracing agent, a bionic shale inhibitor, a filler, an emulsifier, and an amphiphobic wettability reversal agent, wherein, the nano-plugging agent is modified silicon dioxide nano-particle, and its modifying group includes a modifying copolymer chain; the bionic wall bracing agent is carboxymethyl chitosan with a dopamine-derived group grafted on its main chain; the bionic shale inhibitor is composed of structural units of arginine and structural units of lysine; the filler consists of calcium carbonate of 1,600-2,500 mesh, calcium carbonate of 1,050-1,500 mesh, and calcium carbonate of 500-1,000 mesh at a weight ratio of 1:0.55-6:0.55-6; and the amphiphobic wettability reversal agent is a dual-cation fluorocarbon surfactant.

Abstract: The present invention discloses a bionic shale inhibitor, consisting of structural units denoted by formula (1) and structural units denoted by formula (2), wherein, the molar ratio of the structural units denoted by formula (1) to the structural units denoted by formula (2) is 0.2-6:1, and the weight-average molecular weight of the shale inhibitor is 800-4,000 g/mol. The present invention further provides a method for preparation of a bionic shale inhibitor. The present invention further provides a drilling fluid containing the bionic shale inhibitor. The bionic shale inhibitor disclosed in the present invention has high shale inhibition capability, and is environment-friendly and pollution-free.

Abstract: The present subject matter relates to an amphiphilic reservoir protecting agent, including structural units denoted by the following formula (1), (2), (3) and (4). The present subject matter further provides a method for preparation of an amphiphilic reservoir protecting agent. The present subject matter further provides a drilling fluid that contains the amphiphilic reservoir protecting agent. The amphiphilic reservoir protecting agent and drilling fluid obtained in the present subject matter have high reservoir protection property and high shale inhibition property.

Abstract: The present invention provides a biomimetic polymer for stabilizing wellbore, a method for preparation of the biomimetic polymer, and a drilling fluid. The polymer contains carboxymethyl chitosan that serves as a backbone and dopamine-derived groups grafted on the backbone. The polymer provided in the present invention can improve the strength of shale in the wellbore, seal the shale pores and reduce the filter loss of drilling fluid, and thereby attains an effect of stabilizing the wellbore in shale formation in drilling process.

Abstract: The present invention provides a biomimetic polymer for stabilizing wellbore, a method for preparation of the biomimetic polymer, and a drilling fluid. The polymer contains carboxymethyl chitosan that serves as a backbone and dopamine-derived groups grafted on the backbone. The polymer provided in the present invention can improve the strength of shale in the wellbore, seal the shale pores and reduce the filter loss of drilling fluid, and thereby attains an effect of stabilizing the wellbore in shale formation in drilling process.