99results about How to "Does not affect normal communication" patented technology

The invention belongs to the technical field of wireless communication, and particularly relates to a design method of a reflecting surface assisted device-to-device communication system. The scheme of the invention is as follows: a base station receives useful signals from cellular users and interference signals from D2D sending equipment multiplexing the same frequency band; and the D2D receiving equipment receives the useful signals from the corresponding D2D sending equipment and the interference signals from the cellular users sharing the same frequency band. According to the invention, the pairing scheme of the D2D pair and the cellular user is determined through a heuristic method, and the sending power of the D2D link and the cellular link and the passive beamforming of the reflecting surface are optimized in a combined manner, so that the maximization of the system sum rate is realized under the condition of meeting the communication rate requirements of the D2D user and the cellular user. Through simulation verification, under the conditions that normal communication of a traditional cellular system is not affected and energy, frequency spectrum and cost expenditure are not additionally increased, the system sum rate is greatly increased, and the method has very high application value and development potential.

The invention relates to a device and method for monitoring a telephone number of a user. A software radio platform and a global system of mobile communication (GSM) protocol stack program are utilized by the device and method to build a regulation base station system which has a base transceiver station (BTS) function of a GSM network, and the regulation base station system is used for conducting wireless communication with a telephone of the user and extracting identification information, like an international mobile subscriber identification number (IMSI), of the telephone of the user. According to the IMSI of the telephone of the user, a subscriber identity module (SIM) card simulation program is used for achieving SIM card simulation on the telephone of the user, the SIM card simulation program completes operations, such as network authentication and position updating, and then is attached to a normal network through information interaction between identity simulation equipment and a simulation user telephone SIM card, finally the telephone number of the user is extracted by dialing of a called terminal, and monitoring of the telephone number of the user is achieved according to a preset security policy. The device and method is mainly composed of six components including a software radio module, a called terminal module, an identity simulation module, an SIM card simulation module, a main control module and a GSM protocol stack analysis module.

The invention discloses a managed gigabit industrial Ethernet switch supporting a technology for quickly recovering redundancy within 5 ms and meeting requirements of a rail traffic control system. By adoption of a new redundancy algorithm, master and slave switches are selected, and a normal link and a backup link are determined; the communication state of a port is determined by using an interrupted and polling monitoring method; switching between the backup link and the normal link is realized by changing the state of the port; and the recovery time of a gigabit redundancy technology is shortened to be less than 5 ms, and the recovery time of a megabit redundancy technology is shortened to be less than 15 ms.

The invention discloses an online optical network unit (ONU) optical power acquisition device and an online ONU optical power acquisition method; the device includes that: a control signal wire is arranged between an OLT MAC control module and an OLT side optical module; the method comprises that in the operation process of an EPON system, the OLT MAC control module controls the OLT side optical module to measure the optical power of the ONU in the time slot distributed to each ONU by the OLT through the control signal wire. The online ONU optical power acquisition device and the method can measure the accurate optical power of any ONU in the EPON system in an online way, and facilitate the diagnosis and maintenance of optical network.

The invention discloses a wireless communication terminal positioning method. A movable positioning device is used for positioning a target device; the movable positioning device measures the sum of time for propagating a signal from a base station to the target device and time for propagating the signal from the target device to the positioning device; an elliptic line with the position, where the base station and the positioning device are located, as the focus is determined; when a downlink signal and an upper uplink signal which are detected by the target device and the positioning device respectively are directly propagated, it is considered that the target device is on the elliptic line; when the downlink signal and the upper uplink signal which are detected by the target device and the positioning device respectively are not directly propagated, it is considered that the target device is located in the elliptic line; by means of multiple times of measurement, the intersection point of previous ellipses is used as the preferential positioning position for searching for the target device, whether position determining conditions are met or not is measured, and finally the position of the target device is determined. The wireless communication terminal positioning method has the advantage of being high in positioning precision and positioning efficiency.

The invention discloses a channel frequency generation method and device and a channel evaluation circuit. The method includes the following steps: generating a channel frequency for next transmissionat a frequency hopping sequence generation module according to an input parameter and a basic frequency hopping sequence; determining whether the channel frequency is available according to channel quality evaluation through an AFH channel mapping module, and when available, outputting the first channel frequency as a channel sequence of an RF module; and when not available, generating a channelfrequency for the next transmission at the AFH channel mapping module according to the input parameter and the basic frequency hopping sequence, and when the generated channel frequency indicates an available channel, outputting the channel frequency as the channel sequence of the RF module. By adopting the scheme of the invention, the process of transmitting data by using an interference channelcan be avoided, the performance of a transmitter and the quality of a transmitted signal can be improved, and the interference of the channel with the transmitted signal can be reduced; and further, ascheme implemented by a hardware circuit is also provided, and the quality of communication transmission can be greatly improved.

The present invention relates to a shopping system. It includes short message receiving and sending centre for receiving and transferring short message sent by purchaser via short message terminal; switching centre for receiving short message transferred by said short message receiving and sending centre, extracting and sending shopping information provided by said short message and sending correspondent payment request information; shopping platform for proving correspondent goods according to the shopping information sent by said switching centre; and bank payment platform for making settlement according to payment request information sent by said switching centre. According to said system said invention also provides a shopping method by utilizing short message.

The invention provides a coding and decoding method for communication security of a wireless communication physical layer, and the coding and decoding method can be used for remarkably reducing the probability that information is stolen. The invention is realized through the following technical scheme: the sending end encoding the message bit sequence by using an LDPC encoder, performing a specific OR operation on a part of bits of adjacent code words of the sending end to obtain a new bit sequence, and the BPSK modulator modulating the newly generated bits and check bits which do not participate in the operation into BPSK symbols and sends the BPSK symbols to the receiving end; the receiving end BPSK demodulator demodulating the logarithm likelihood ratio LLR value of the code word checkbit according to the code word message bit prior information fed back by the receiving end LDPC decoder and the channel receiving symbol; and the LDPC decoder at the receiving end calculating a message bit LLR value, decoding the message bit of the current code word, and feeding the code word message bit LLR value back to the BPSK demodulator at the receiving end, so that iteration is carried outuntil the message bits of all code words are decoded.

The invention discloses targeted interference equipment and an interference method of wireless local area network. The interference equipment of the wireless local area network comprises a radio frequency receiving module, a frequency scanning module, a physical layer receiving module, a multi-access computer layer (MAC) analyzing and comparison module, an interference data generating module, a radio frequency transmitting module, a power amplifier and an antenna, wherein on one hand, the radio frequency module is connected with the antenna, and on the other hand, the frequency scanning module and the physical layer receiving module are respectively connected with the radio frequency module, the physical layer receiving module is connected with the MAC layer analyzing and comparison module, and the interference data generating module, the radio frequency transmitting module and the power amplifier are respectively connected with the MAC layer analyzing and comparison module. According to the targeted interference equipment and the interference method of wireless local area network, shield interference can be merely conducted by targeting appointed sites without influencing normal communication of other sites in network, and interference to all sites can be achieved. The targeted interference equipment and the interference method of wireless local area network is good in interference effect, wide in range of action and low in energy consumption.

The invention discloses a mobile terminal and a method for limiting inter-process communication thereof, a storage medium. The method for limiting the inter-process communication comprises: acquiringa first number of available binder threads of a server, wherein the binder thread is provided by the server and is used to respond to the binder request sent by the client to realize the communicationbetween the client and the server; determining whether the first number is less than a first set threshold value; If so, restricting the binder communication between the client and the server; dividing clients into first-class client and second-class client according to their importance, wherein the importance of first-class client is less than that of second-class client. By using the method, the busy degree of the server can be reduced, and the fluency of the system can be ensured.

The invention, which relates to the technical field of wireless communication, provides a method and system for obtaining location of user equipment, a management platform and a virtual base station. The method comprises: the management station sends a control instruction for obtaining the location of user equipment to a virtual base station arranged at each zone, so that the virtual base station transmits a signal to the zone where the virtual base station is located according to a preset transmission power; if the user equipment is connected to the virtual base station, the management platform receives an international mobile subscriber identity (IMSI) of the user equipment and an ID of the virtual base station, wherein the IMSI and the ID are reported by the virtual base station; and the management platform determines the zone corresponding to the ID is the location of the user equipment corresponding to the IMSI according to a preset correspondence relationship between the ID and the zone where the virtual base station is located. Therefore, the location of a mobile phone can be obtained under the circumstance that normal communication of the mobile phone is not affected and cooperation by the user or operator is not required. The method is simple and is easy to implement.

The invention relates to a software upgrading method, device and system, a vehicle and a storage medium. The method is applied to vehicle-mounted electric control equipment connected to a whole vehicle CAN bus, the resistance values of a first terminal resistor and a second terminal resistor connected to the whole vehicle CAN bus are both smaller than 120 ohms. The method comprises steps of a first message sent by external upgrading equipment being received at a first communication rate; sending a response message to the upgrading equipment under the condition of determining that the upgradingequipment is the target vehicle-mounted electronic control equipment according to the identification information; if the response message is sent, receiving a second message sent by the upgrading equipment at the first communication rate; in response to the second message, switching the communication rate to a second communication rate; and receiving the upgrading program sent by the upgrading equipment at the second communication rate, and installing the upgrading program. The method is advantaged in that the communication rate can be increased from the first communication rate to the secondcommunication rate on the basis of not replacing the CAN bus of the whole vehicle, transmission of an upgrading program is accelerated, the software upgrading speed is increased, and the software upgrading time is shortened.

The invention discloses an OFDM-based data transmission device. A high-speed DSP and a corresponding software program are adopted for detecting and judging the operation situation of two mainframes and two channels, corresponding non-contact soft handover is carried out when a certain mainframe or channel breaks down, normal communication is not affected when any mainframe or channel breaks down, and meanwhile as a hardware switching circuit is omitted, safety and reliability of data transmission are greatly improved. Aiming at solving the problems that a power line carrier channel is large in noise and severe in interference, improving the impulse interference and narrow-band interference resistance capacity of data signal transmission to the maximum extent and effectively improving the utilization rate of a frequency band at the same time, the OFDM and the method realized by the DSP software are adopted, and the goal that signal transmission rate in bandwidth of 4 kHz on a power line reaches 9600 b/s is achieved.

The invention discloses a mobile terminal, a method for limiting inter-process communication thereof, and a storage medium. The method for limiting the inter-process communication comprises: acquiringa first number of available binder threads of a server, wherein the binder thread is provided by the server and is used to respond to the binder request sent by the client to realize the communication between the client and the server; determining whether the first number is less than a first set threshold value; if so, restricting binder communication between the background client and the server. Through the method, the busy degree of the server can be reduced, and the fluency of the system can be ensured.

The invention discloses an active output driving circuit of an input and output module. The active output driving circuit comprises a supply circuit, an output starting protection circuit and a line detection circuit. The supply circuit comprises a diode V3, a triode V21 and a capacitor C8. The output starting protection circuit comprises a triode V16, a voltage stabilizing diode D4 and a triode V18. The line detection circuit comprises a resistor R16, a resistor R20, a capacitor C9 and a diode V19. A bus directly supplies power to the active output driving circuit for operation, no relay needs to be adopted, in addition, peripheral equipment can be subjected to effective voltage reduction protection when breaking down, and normal communication of the bus is guaranteed. Therefore, the active output driving circuit is suitable for application and popularization.

The invention discloses a power measurement and radio frequency receiving gain control device applied to a channel simulator. The power measurement and radio frequency receiving gain control device comprises an input end, a coupler, a main signal branch, a branch signal branch and an output end. According to the invention, the nonlinear problem introduced by the channel simulator receiving channelsimulation device is solved, receiver vector performance is improved, and the algorithm problem of realizing power control in a digital domain is solved. Data are compared and analyzed in a digital domain, power distribution of a receiving channel is achieved, the problem that a channel simulator cannot automatically identify power of an input signal is solved. The problem that the channel simulator accurately measures the power of the input signal is solved, switching time delay is small, normal communication is not affected, a power measurement algorithm is simple, and the calibration process is simple and rapid.

The invention discloses a workpiece manufacturing method, a glass workpiece and an electronic device. The method comprises the steps of determining a predetermined surface of material to be manufactured, wherein the material to be manufactured is a material with a first surface and a second surface, the first surface and the second surface are opposite and the predetermined surface is at least one surface of the first surface and the second surface; performing wire-drawing treatment on the predetermined surface to enable the predetermined surface to form a first representation characteristic; performing coating treatment on the predetermined surface to enable the predetermined surface with the first representation characteristic to form the surface with a second representation characteristic so as to obtain a first workpiece manufactured by using the material to be manufactured, wherein the surface with the second representation characteristic is shown on one surface of the first workpiece. By utilizing the technical scheme disclosed by the embodiment of the invention, the sense of quality of the electronic device can be highlighted and user experience is upgraded; normal communication of the electronic device is not affected.

The invention discloses a communication method, a communication system and a storage medium. The communication method comprises the steps that a CPLD receives a communication signal transmitted by a CPU and sequentially transmits the communication signal to slave equipment connected with the CPLD; and the CPLD forwards data between the CPU and the slave equipment according to the communication signal. The CPLD is arranged between the CPU and the slave equipment, the CPLD is connected with the CPU through a group of MDIO buses, and the CPLD is connected with each set of slave equipment througha group of MDIO buses. When the CPU needs to communicate with the slave equipment, the CPLD forwards the signal sent by the CPU to the slave equipment and forwards the data between the CPU and the slave equipment so that the MDIO bus of each set of slave equipment is independent and does not influence each other, and even if one set of slave equipment goes wrong, the normal communication between the CPU and other slave equipment is not influenced.

The invention discloses a scattering channel environment parameter measuring device which is high in automatic degree, convenient to transport, mount and use, and capable of achieving long-term measuring and storing of scattering channel environment parameters. The scattering channel environment parameter measuring device comprises a scattering channel environment parameter measuring unit, a time unit, a processing and storing unit, a display unit, a communication interface unit and a power source. Through actual application, it is proved that the scattering channel environment parameter measuring device has a good practical effect.