Abstract: Embodiments disclose a method and device for determining a node movement. The method includes: when a first node determines that the first node is currently in an abnormal state, broadcasting at least two RSSI request messages, and receiving signal strength measurement values that are returned by a second node and separately obtained by means of measurement for at least two RSSI request messages in the at least two RSSI request messages broadcast by the first node. The method also includes separately calculating at least two path loss values between the first node and the second node according to the at least two received signal strength measurement values; and determining that the first node moves when it is determined that a quantity of second nodes, of which at least two path loss values are all different, is greater than a set threshold.

Abstract: Provided is a method for multithreaded program output uniqueness testing and proof-generation, based on program constraint construction; according to multithreaded program semantics, a constraint expression is constructed; an output uniqueness verification problem is converted to a constraint solving problem; a constraint solver is used to detect the presence of different outputs, and a counterexample execution path describing different outputs is generated; first, a tested program is stubbed, and the program is executed to obtain an execution path; then, according to multithreaded program execution semantics, the execution path is converted to a first-order logic expression having no quantifiers, the constraint expression encompassing all possible thread interleavings; then, uniqueness verification conditions are constructed for the output of a first run; lastly, the constraint solver is used for verifying whether a path is causing the output value and the run result to be inconsistent.

Abstract: A channel access method and a node are disclosed. The method includes randomly selecting a backoff period XB according to a backoff exponent BE, where XB=X×aUnitBackoffPeriod, and X is an integer randomly selected from 0?(2BE?1); when X is greater than or equal to a predetermined value, determining a middle backoff, where the middle backoff is less than the backoff period, performing a backoff until the middle backoff ends and then performing a CCA; if a channel is clear, performing data transmission, and if the channel is not clear, continuing the backoff until the backoff period ends and then performing a CCA, and executing a channel access operation according to a result of the CCA performed when the backoff period ends. Therefore, data transmission is performed when a channel is clear, which can reduce a data transmission delay.

Abstract: Embodiments of the present invention disclose a sending apparatus and a receiving apparatus, and a method for sending a physical layer signal, includes: constructing a signal with a frame structure comprising multiple Ga128 sequences, a —Ga128 sequence, and a single-frequency sequence of M in length; wherein the Ga128 and —Ga128 sequences are Golay sequences of 128 in length, M is an integer multiple of 128, and the single-frequency sequence comprises M single-frequency symbols and is used to enable a receiving apparatus to estimate an Inphase and Quadrature (IQ) imbalance parameter; and sending the signal with the frame structure.

Abstract: The present invention provides a channel selection method and an apparatus, relates to the field of communications, can improve channel scan and detection efficiency. The method includes: randomly selecting m channels from a preset channel page; determining, from the m channels, a working channel and a spare channel that meet a preset condition; scanning, the working channel of the first superframes and the spare channel of the first superframes in an inactive period of each of the n first superframes according to preset first scan duration, to acquire n energy levels of the working channel and n energy levels of the spare channel; and determining, in an inactive period of the nth first superframe, a working channel for sending a second superframe and a spare channel of the second superframe according to the n energy levels of the working channel and the n energy levels of the spare channel.

Abstract: The present invention discloses an apparatus and a method for scheduling a timeslot. The apparatus includes: a first acquiring module, configured to acquire first interference information; a second acquiring module, configured to acquire second interference information; a third acquiring module, configured to acquire timeslot scheduling information of a link of the at least one second BSS, where the timeslot scheduling information is used to indicate information about a scheduled timeslot of the link of the at least one second BSS; and a scheduling module, configured to schedule a timeslot for a link of the first BSS according to the first interference information, the second interference information, and the timeslot scheduling information. According to the apparatus and the method for scheduling a timeslot in embodiments of the present invention, interference to a link of another network can be avoided actively, and a timeslot can be scheduled properly.

Abstract: Embodiments of the present invention provide a data transmission apparatus and method. The data transmission apparatus includes: a processor, configured to, record a link quality indication value corresponding to received data and add 1 to a count value, if the data is received within a preset period of time; if it is learned by comparison that the count value is not less than a quantity N of pieces of data allowed to be transmitted in a current period, calculate an average value of link quality indication values; and compare the average value with a threshold to determine a quantity of pieces of data allowed to be transmitted in a next period The apparatus also includes a transceiver, configured to reply with a periodicity acknowledgment frame that carries the quantity of pieces of data allowed to be transmitted in the next period.

Abstract: Embodiments of the present invention disclose a method, an apparatus and a system for sending a physical layer signal, where the method for sending a physical layer signal includes: constructing a signal frame of a physical layer signal, where the signal frame includes one single-frequency sequence, the single-frequency sequence is used to enable a receiving apparatus to capture the signal frame in a frequency domain according to the single-frequency sequence, and the single-frequency sequence includes a plurality of single-frequency preset symbols; and sending the physical layer signal based on the signal frame. Applying the present invention can facilitate capturing the signal frame in a frequency domain by a receive end, and therefore, not only impact caused by frequency offset is overcome, but also multipath energy may be used effectively to improve performance of capturing.

Abstract: A tray assembly configured for carrying a storage device is provided. The tray assembly includes a carrier, a base frame, a handle and a connecting rod. The carrier carries the storage device. The base frame slidably connects with the carrier, allowing the carrier to slide between a first position and a second position relative to the base frame. The base frame includes a locking part and the handle pivots to the base frame. Two ends of the connecting rod respectively pivot to the carrier and the handle. When the handle rotates relative to the base frame and drives the carrier to slide to the first position, the carrier is carried on the base frame and the handle locks up with the locking part. When the handle rotates relative to the base frame and drives the carrier to slide to the second position, the carrier tilts relative to the base frame.

Abstract: The present invention relates to the field of communications technologies, and discloses a beam tracking method, apparatus, and system, so as to ensure rapid discovery and to switch from an optimal link to a backup link in time, or switch from a backup link to an optimal link, thereby effectively improving a throughput of a system link. The beam tracking method includes: transmitting, by a beam tracking initiator, a beam tracking request to a beam tracking responder; receiving, by the beam tracking initiator, an enhanced beam tracking training auxiliary sequence transmitted, according to the enhanced beam tracking request, by the beam tracking responder; and when it is determined according to a reception detection result of the enhanced beam tracking training auxiliary sequence that it is necessary to switch to a backup beam link, transmitting, by the beam tracking initiator, first link switching information to the beam tracking responder.

Abstract: Embodiments of the disclosure provide a method and an apparatus for selecting a preferred parent node in a wireless sensor network, and the method includes: according to all received DIO messages, separately acquiring, by a first node, node identification information carried in each of the DIO messages and generates a parent node set; selecting, by the first node, a fixed node with a highest performance parameter level as a preferred parent node when it is determined that the parent node set includes at least two fixed nodes; and selecting, by the first node, a mobile node with a highest performance parameter level as the preferred parent node when it is determined that the parent node set does not include a fixed node, and includes at least two mobile nodes.

Abstract: Embodiments disclose a method and device for determining a node movement. The method includes: when a first node determines that the first node is currently in an abnormal state, broadcasting at least two RSSI request messages, and receiving signal strength measurement values that are returned by a second node and separately obtained by means of measurement for at least two RSSI request messages in the at least two RSSI request messages broadcast by the first node. The method also includes separately calculating at least two path loss values between the first node and the second node according to the at least two received signal strength measurement values; and determining that the first node moves when it is determined that a quantity of second nodes, of which at least two path loss values are all different, is greater than a set threshold.

Abstract: A product outer shell containing its own record of any private and unwarranted disassembly includes a first outer element, a second outer element detachably connected with the second outer element, a consumer disassembly inhibiting structure. The consumer disassembly inhibiting structure includes a circuit board, a plurality of special conductive bodies, a plurality of general conductive bodies, and a positioning plate. The special conductive bodies and general conductive bodies all have the same structures and each is secured on the circuit board to electrically connect to a chip located on the circuit board. A conductive piece is positioned on the positioning plate and is coupled with the special conductive bodies. The chip is configured to record electric connections between the special conductive bodies and the conductive piece, the original electric connections being changed to other or no connections after any disassembly of the product outer shell.

Abstract: A housing containing its own record of any private and unwarranted disassembly includes a first shell, a second shell detachably connected with the second shell, a consumer disassembly indication structure. The consumer disassembly indication structure includes a circuit board, a plurality of switches, a computer chip, a plurality of conductive bodies, and a plurality of insulative bodies. The plurality of switches are fixed on the circuit board and each is electrically connected with the computer chip. The computer chip is configured to record electric connections between the conductive bodies and switches, the original electric connections being changed to other or no connections after any disassembly of the housing.

Abstract: A hard disk assembly includes a tray, a bracket, and a carrier. The tray includes plural protrusions. The bracket is disposed on the tray for fastening a hard disk device. The bracket includes a bracket body having plural slots thereon, and plural pins disposed on opposite sides of the bracket body. The slots are respectively engaged with the protrusions. The pins are disposed between the bracket and the tray. The carrier is pivotally connected to the tray. The carrier includes two ribs. Each rib has a curved surface for touching and pulling the pins. Therefore the bracket can be slidably moved on the tray along the slots.

Abstract: Embodiments of the present invention provide a data processing method, a coordinator, and a node device. The coordinator receives a data frame sent by the node device, where the data frame includes service data; the coordinator determines whether the service data is within a set data confidence interval; and if the coordinator determines that the service data is beyond the data confidence interval, the coordinator sends a questioned-data frame to the node device, where the questioned-data frame carries the service data, so that the node device confirms correctness of the service data.

Abstract: The present invention provides a channel selection method and an apparatus, relates to the field of communications, can improve channel scan and detection efficiency. The method includes: randomly selecting m channels from a preset channel page; determining, from the m channels, a working channel and a spare channel that meet a preset condition; scanning, the working channel of the first superframes and the spare channel of the first superframes in an inactive period of each of the n first superframes according to preset first scan duration, to acquire n energy levels of the working channel and n energy levels of the spare channel; and determining, in an inactive period of the nth first superframe, a working channel for sending a second superframe and a spare channel of the second superframe according to the n energy levels of the working channel and the n energy levels of the spare channel.

Abstract: The present invention provides a method for selecting a network controller and a station device. Supported channel width sets of multiple station STA devices are acquired; a PCP factor of the each STA device is generated according to a supported channel width set and an acquired directional multi-gigabit DMG capability information element of the each STA device, where the PCP factor includes the supported channel width set; a STA device with a largest PCP factor is selected as a PCP. Using the method for selecting a PCP and the STA device provided in the present invention can improve reliability of a wireless local area network WLAN.

Abstract: A product outer shell containing its own record of any private and unwarranted disassembly includes a first outer element, a second outer element detachably connected with the second outer element, a consumer disassembly inhibiting structure. The consumer disassembly inhibiting structure includes a circuit board, a plurality of special conductive bodies, a plurality of general conductive bodies, and a positioning plate. The special conductive bodies and general conductive bodies all have the same structures and each is secured on the circuit board to electrically connect to a chip located on the circuit board. A conductive piece is positioned on the positioning plate and is coupled with the special conductive bodies. The chip is configured to record electric connections between the special conductive bodies and the conductive piece, the original electric connections being changed to other or no connections after any disassembly of the product outer shell.

Abstract: A tray assembly configured for carrying a storage device is provided. The tray assembly includes a carrier, a base frame, a handle and a connecting rod. The carrier carries the storage device. The base frame slidably connects with the carrier, allowing the carrier to slide between a first position and a second position relative to the base frame. The base frame includes a locking part and the handle pivots to the base frame. Two ends of the connecting rod respectively pivot to the carrier and the handle. When the handle rotates relative to the base frame and drives the carrier to slide to the first position, the carrier is carried on the base frame and the handle locks up with the locking part. When the handle rotates relative to the base frame and drives the carrier to slide to the second position, the carrier tilts relative to the base frame.