51results about "Transmission monitoring" patented technology

A method of handling positioning measurement for a relay in a wireless communications system is disclosed. The method comprises communicating with a mobile device and a base station to serve the mobile device for conveying signaling between the mobile device and the base station, and transmitting a first reference signal associated with a positioning measurement to the mobile device.

The delay setting of an optical delay line interferometer (DLI) used to decode differentially encoded phase shift keyed signals (DPSK or DQPSK) is controlled using a control signal representative of the ratio P_err2/P_err1 of the rate of occurrence of double errors and the rate of occurrence of errors. The ratio P_err2/P_err1, as the delay setting of the DLI is varied, exhibits a characteristic W-shaped structure consisting of a local maximum at the optimum value and two minima adjacent to the maximum, one on each side of it. This structure is present over a wide range of signal to noise ratio and residual dispersion.

A camera-equipped mobile terminal and a method for automatically restricting the use of its picture-taking function are provided. The terminal detects a frequency signal of a wireless channel other than wireless channels used for communication, which has high Received Signal Strength Indication (RSSI) and low pilot power/total received power (Ec/Io). If the strength (i.e., RSSI value) of the detected frequency signal is greater than a predetermined threshold, the picture-taking function of the mobile terminal is deactivated.

The invention relates to a short wave communication reliability evaluation method based on multi-system detection data. The method comprises the steps of: calculating reflection point positions of a short wave communication link and all detection links, and selecting detection link data close to the reflection point position of an ionized layer of the short wave communication link; according to the determined reflection point positions of ionized layers of the detection links and the determined detection link data, forecasting an ionized layer parameter of reflection points of the ionized layers of the detection links; according to the determined reflection point positions of the ionized layers of the short wave communication link and the detection links and the forecasted ionized layer parameter of the reflection points of the ionized layers of the detection links, reconstructing an ionized layer parameter of the reflection point of the ionized layer of the short wave communication link; forecasting the highest available frequency of the short wave communication link by using a short wave propagation forecasting method according to the obtained ionized layer parameter; and calculating the received field intensity when the short wave communication link adopts the highest available frequency for communication according to the obtained highest available frequency, and analyzing the reliability of the short wave communication link.

The invention discloses a method and device for controlling uplink power. The method comprises the steps of: calculating downlink path loss of a mobile station in a service cell; calculating path loss of the mobile station to an adjacent cell; calculating path compensating transmitting power of the mobile station according to the downlink path loss of the mobile station in the service cell and the path loss of the mobile station to the adjacent cell; and obtaining basic open loop transmitting power of the mobile station according to the path compensating transmitting power of the mobile station. According to the technical scheme provided by the invention, the system frequency spectrum efficiency and the cell edge user frequency spectrum efficiency can be simply and effectively combined.

A method for allowing a mobile station (MS) to dynamically adjust its T_ADD_R and T_DROP_R pilot signal strength thresholds (established by pilot E_c/I_o values) used to add or drop pilots from the MS's active set during rescue. Dynamic adjustment of T_ADD_R and T_DROP_R allows the MS to select and add BSs (sectors) with sufficient forward link quality into their active sets and drop BSs (sectors) with poorer forward link quality during a call recovery procedure to recover an active connection before it is dropped. In addition, the effectiveness of recovering an active connection is improved through corresponding actions at the BS. The BS may use the signal strength measurements, active set information, and other pilot information to update its own active set for use in generating a forward rescue channel.

A method for reducing interference in a mobile network in which a node A proposes a wireless link with node B. The method includes: (a) determining an angle between an incoming link from a node C to node B and the proposed node A to node B link, wherein the incoming link and the proposed link utilize the same frequency; (b) utilizing a nominal center of a beam of the proposed link, estimate an effective gain at node B to admit interference from the direction of node A into the incoming link from node C; (c) estimating a carrier intensity arriving at node B from node C; (d) determining a ratio of arriving node C to node B carrier to potential interference from the proposed node A to node B link; and (e) conditioning establishment of the proposed node A to node B link upon the determined ratio.

A method for uplink (UL) transmission from a user equipment (UE) to a base station (BS) includes selecting, with the UE, a transmission resource used for the UL transmission from multiple transmission resources of the UE, based on selection information or determination in the UE, and transmitting, from the UE to the BS, a UL signal or a UL channel using the selected transmission resource. The selection information indicates a transmission resource designated by the BS. The selecting selects a plurality of transmission resources used for the UL transmission. The transmitting transmits a plurality of UL signals or a plurality of UL channels using the plurality of transmission resources. A method of transmit power control (TPC), the method comprising: performing, with a user equipment (UE), different TPC for each transmission resources of the UE.

The present invention relates to a method and apparatus for determining radio link failure between the UE and the eNB in a wireless communication system. Particularly, the present invention provides a method and apparatus for determining radio link failure efficiently in such a way that the UE measures the radio link quality of the anchor carrier, the radio link qualities of the aggregated carriers, and the radio link quality of neighbor cells in order, and determines whether the radio link quality fulfills a predetermined condition.

The invention discloses a mixed indoor positioning method based on a signal subspace fingerprint database; the method comprises an offline phase and a positioning phase; the offline phase comprises the following steps: using an array antenna to receive signals, obtaining received signal intensity, and building a received signal intensity fingerprint database; calculating received array signals, obtaining signal subspace data, and building a signal subspace fingerprint database. The positioning phase comprises the following steps: matching online obtained data with the fingerprint database, considering offline coordinate probability distribution, using the Bayes theory to fuse information, and finally obtaining the accurate positioning coordinates. The method uses the array antenna technology which represents the future mobile terminal key technology; the fingerprint database built after array signal processing contains incident signal intensity and arrival angle information, thus more effectively confronting channel time varying influences caused by anti-multipath propagation and environment changes, effectively improving indoor positioning accuracy, and reducing positioning errors.

Consistent with the present disclosure, data, in digital form, is received by a transmit node of an optical communication system, and is then provided to a modulator that, in turn, modulates light, received from an optical source at one of a plurality of periodically and preferably minimally spaced wavelengths. The plurality of periodically spaced wavelengths or carriers are grouped together with minimal carrier spacing, to form a superchannel. The carrier spacing between adjacent carriers is determined by detecting a beat frequency of a combined optical signal that includes the outputs of two adjacent optical sources. The beat frequency corresponds to a frequency difference between the outputs of the adjacent carriers. This frequency difference should correspond to a desired carrier spacing between each of the plurality of carriers. A frequency error between the beat frequency and the desired carrier spacing is then measured by down-converting the beat frequency with respect to a target reference frequency corresponding to the desired carrier frequency spacing. Based on the determined frequency error, the optical sources are controlled to adjust in frequency to minimize or reduce the frequency error to zero. For every pair of adjacent carriers, the corresponding outputs of the optical sources are compared in the above manner to determine a plurality of frequency errors. Each optical source can thus be tuned in order to realize a precise carrier spacing between each of the adjacent carriers.

The invention relates to a WiFi signal test method and system. The method comprises setting a plurality of different-class test software, which comprises reference test software, positive deviation software and a negative deviation software, in advance; connecting a wireless network card with a to-be-tested WiFi product through the test software; controlling, through the test software, the to-be-tested WiFi product to send power to the wireless network card to perform a sending performance test, and controlling the to-be-tested WiFi product to receive the power sent by the wireless network card to perform a receiving performance test; and, when a deviation between a power value sent by the to-be-tested WiFi product and a power value received by the wireless network card is within a predetermined first threshold, and when a deviation between a power value received by the to-be-tested WiFi product and a power value sent by the wireless network card is within the predetermined first threshold, the to-be-tested WiFi product is qualified, otherwise the to-be-tested WiFi product is not qualified. The WiFi signal test method and system do not need to use an expensive WiFi signal test instrument to perform the test, the expense of testing is reduced, and cost is saved.

Methods and systems for signal processing are disclosed herein and may include storing bit sequences for a plurality of previously received control channels. A bit sequence for a currently received control channel may be correlated with at least one of the bit sequences for the plurality of previously received control channels. One of the bit sequences for the plurality of previously received control channels may be selected to represent the bit sequence for the currently received control channel, based on the correlating. The selected one of the stored bit sequences for the plurality of previously received control channels may include a maximum correlation. The maximum correlation may be higher than a threshold value. The bit sequence for the currently received control channel may include slow associated control channel information. The bit sequence for the currently received control channel may be decoded using Viterbi decoder and/or fire code decoder.

A method for radio resource allocation based on planned priority ordering to realize the maximum carrier to interference ratio (C/I) in a cellular system that employs frequency reuse. Reuse of co-channel resources is progressively increased as traffic load increases based on the available spectrum. By using this method, interference rejection at light loading can approach that obtainable by using a low reuse factor. When applied to a wireless packet network, this method allows each resource to carry highest throughput according to the traffic demand and available bandwidth, while making more resources available to carry additional traffic when system loading is increased.

The invention discloses an energy efficiency joint optimization method in MU-MIMO wireless energy/data transmission. The method takes the uplink/downlink work switching point and the base station sending power into consideration, and comprises the following steps: a user terminal firstly receives the energy sent from a base station, and then sends the data by using the energy to the base station. The optimization target of the method is the maximum system energy efficiency, the maximum system energy efficiency represents that the system can perform the most data transmission by using the least energy, and shows the optimization of the system. In the system energy efficiency optimization process, the problem is subjected to equivalence by using the Lagrangian duality theory, and then the problem is resolved by using an iteration algorithm based on the Dinkelbach algorithm, thereby acquiring the optimal energy efficiency.

The invention discloses a method and a device for feeding back hybrid channel state information, and a method and a device for processing feedback information. The method for feeding back the hybrid channel state information comprises the following steps of: estimating a channel state, and generating channel state information according to a result of channel estimation; measuring performance of the downlink according to the channel state information, and generating a control bit for indicating whether base station arrangement is modified or not according to the measurement result; when the control bit indicates that the base station arrangement is modified, sending the control bit and the channel state information to a base station; and when the control bit indicates that the base stationarrangement is not modified, only sending the control bit to the base station. By the method of the embodiment of the invention, whether the hybrid state information is fed back or not is judged according to the performance of the downlink, the expenditure of channel state information at transmitter (CSIT) feedback is reduced, and better downlink transmission performance is provided.

The invention provides a router visitor verification method and system and a router. The router visitor verification method comprises the following steps: setting an SSID (Service Set Identifier) without any password; when an intelligent terminal is connected to the SSID, detecting the receiving power of the intelligent terminal; when the receiving power of the intelligent terminal is smaller than a set power threshold, adding the intelligent terminal into a blacklist by the router and forbidding the intelligent terminal in the blacklist to access to the Internet; and setting a detection period for detecting the receiving power of the intelligent terminal in the blacklist regularly, and moving the mobile terminal out of the blacklist and allowing the intelligent terminal to access to the Internet through the router when the receiving power of the intelligent terminal is greater than or equal to the power threshold. Through adoption of the technical scheme, the security of visitor access can be realized. Meanwhile, the router visitor verification method and system and the router are easy to use.

A signal selecting circuit according to the present invention includes an abnormality detection circuit that detects an abnormality of the signal input as the main signal in an input stage, a select circuit that selects and outputs the signal input as the main signal among the plurality of signals in the normal state, and when the abnormality detection circuit detects an abnormality of the signal input as the main signal, selects and outputs the signal input as the reserve signal, and a delay circuit that delays the signal input as the main signal by a delay time and outputs the delayed signal to the select circuit, the delay time being equal to or greater than a total time of a detection time in the abnormality detection circuit and a signal switching time in the select circuit.

A downstream power calibration method comprises the following procedures. First, select base sampling frequencies and sampling power levels, thereby generating base sampling signals. Next, input base sampling signals into a modem such that obtaining each sum of the feedback signals responding to the tuner and the IF amplifier of the modem by the modem chip corresponding each said base sampling signal, thereby setting up a sampling data table. Third, repeat the procedure mention above for a plurality of modems to get a plurality of sampling data tables respectively, and then obtain a mean data table. Fourth, select spot frequencies and spot power levels from the base sampling frequencies and the base sampling power levels to generate spot sampling signals. Thereafter, input the spot sampling signals into a cable modem and set up a skeleton data table. Finally, expand skeleton data table and obtain an individual default data table for the modem, thereby providing the basis of the calculation of power levels when the cable modem is receiving downstream signals.

A receiving station apparatus controls a number of null carriers included in a transmission signal transmitted by a transmitting station apparatus in a communication system adopting a multicarrier modulation system to suppress inter-carrier interference by using the null carrier. For example, a reception-quality measuring unit measures a reception quality of a subcarrier group forming the transmission signal, and a number-of-null carriers determining unit determines the number of null carriers included in a next transmission signal based on the reception quality.

Methods and apparatuses disclosed herein enable the use of Demodulation Reference Signal, DMRS, sequences that are numbered relative to an overall system bandwidth (30), while simultaneously enablingwireless communication devices (12) to determine the DRMS sequence elements mapped to their scheduled bandwidths (36) within the system bandwidth (30). Advantageously, the wireless communication devices (12) need not know the system bandwidth (30), or even be aware of where their scheduled bandwidths (36) reside within the system bandwidth (30).

The invention provides a multiunit interference-preventing communication method and a communication system. A remote control method comprises the following steps: wireless signals are transmitted to ato-the-selected device, multiple signal intensity detection units arranged on devices respectively receive the wireless signals, the intensities of the wireless signals received by the signal intensity detection units are compared, and the device with the maximum wireless signal intensity is determined to be the to-the-selected device. A remote control system comprises the multiple signal intensity detection units, a remote controller and a processing unit, wherein the signal intensity detection units for detecting the intensities of the wireless signals are arranged on the devices respectively; the remote controller comprises a transmitting end for transmitting the wireless signals; the processing unit is wirelessly connected with the signal intensity detection units and the remote controller, a response is given to the wireless signal intensities detected by the signal intensity detection units, the processing unit compares and obtains the maximum wireless signal intensity, and thesignals are transmitted to the remote controller to build remote control connection with the device corresponding to the maximum wireless signal intensity.