77results about "Radio transmission" patented technology

Aspects of the disclosure provide a computer-implemented method and system for the assignment of roadside assistance service providers such as tow trucks to distressed vehicles/drivers requiring roadside assistance. The methods and systems may include a roadside assistance service provider system with a collection module, an assignment module, and a feedback module. The collection module collects roadside assistance service provider information and historical statistics from real-world information and stores the information in a database that may then be analyzed using particular rules and formulas. The assignment module assigns particular roadside assistance service providers to particular distressed vehicles/drivers based on one or more characteristics. The feedback module may provide near real-time cues to the tow truck driver's mobile device, such as alerting when the amount of time spent on a task exceeds a predefined threshold, flagging high priority tasks/assignments, providing a step-by-step checklist for the repair.

An emergency call (e.g., a 911 call, an alarm company call) forwarded by a telematics call center is routed over the switched PSTN to a Voice Over Internet Protocol (VoIP) call server, where the switched call is converted to a session initiating protocol (SIP) packetized IP call for presentation to an emergency services gateway, which reconverts the call to TDM and connects to a selective router via dedicated circuits, gaining full access to the Enhanced 911 network. This provides a PSAP receiving a call from a telematics call center or other call center with all features available in an Enhanced 911 network, e.g., callback number of the 911 caller, and location of the 911 caller. Location of the caller is provided using a VoIP positioning center (VPC).

A wideband receiver for a wireless communication system and a method for controlling the same are provided. In the wideband receiver for a wireless communication system, a receive path includes a mixer for receiving a Radio Frequency (RF) signal having a frequency f_SG and for converting the RF signal into an Intermediate Frequency (IF) signal having a frequency f_IF by mixing the RF signal with a first local oscillation signal having a first local oscillation frequency f_LO1, and at least one Phase Locked Loop (PLL) for providing the local oscillation signal to the mixer. A control block determines whether a half-IF signal having a center frequency of f_SG-f_IF/2 exists in the IF signal, and when the half-IF signal exists, controls the at least one PLL to generate a second local oscillation signal having a second local oscillation frequency f_LO2 greater than the first local oscillation frequency f_LO1.

A mobile communication system with a packet switching function which enables sharing of radio resources among mobile stations, wherein a mobile station which has generated a request for communication quality assurance periodically sends a packet for requesting preferential use of a radio channel in order to prevent timeout of the state transition timer, timeout of which would cancel radio channel assignment to the mobile station and bring it into a dormant state if a certain period elapses without transmission or reception of a signal, so that it can remain in the active state and hold the radio channel continuously. In addition, when the mobile station requesting communication quality assurance moves from one cell to another or requests radio channel assignment, the base station controller controls the radio base station so that the mobile station can be assigned a radio channel by sending a priority request packet.

The embodiment of the invention provides a method for pairing an unmanned aerial vehicle and a remote controller, a server, the remote controller and a system, wherein the system at least comprises the server, the remote controller and the unmanned aerial vehicle, wherein the server is used for judging that the remote controller is bound with the unmanned aerial vehicle in need of being paired, obtaining a pairing parameter corresponding to a pairing request, and returning the pairing parameter to the remote controller; the remote controller is used for generating the pairing request, sending the pairing request to the server, and performing communication configuration of the remote controller according to the pairing parameter; and the unmanned aerial vehicle is used for obtaining the pairing parameter from the server or the remote controller, and performing communication configuration of the unmanned aerial vehicle according to the pairing parameter. By means of the embodiment of the invention, the pairing accuracy rate of the unmanned aerial vehicle and the remote controller can be increased; and environmental requirements in the pairing process can be reduced.

A passive optical network (PON) including an optical line termination (OLT) and a plurality of optical network units (ONUs) which are connected. The optical line termination includes a band setting control section; an upstream control cell receiving section; a use right transmitting section; and a downstream control cell transmitting section. Each of the plurality of optical network units includes a downstream control cell receiving section; a use right acquisition determining section; and an upstream control cell transmitting section.

The invention belongs to the technical field of wireless communication, and particularly relates to a channel estimation algorithm for a multi-user massive MIMO (Multiple Input Multiple Output) system under a frequency division duplex (FDD) mode. In the multi-user massive MIMO system, channel estimation is realized by a sparse signal recovering technology through an inference method based on Bayes compressed sensing, and channel estimation overhead of the FDD massive MIMO system can be lowered greatly.

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.

A master unit and a remote unit is provided for a multiband transmission system for distributing and combining signals of at least one wireless communication network and at least one digital network. A reference frequency generator is arranged in the master unit, the reference frequency generator being designed to clock a master modem for converting the signals of the at least one digital network. The reference frequency signal emitted by the reference frequency signal is restored via a reference frequency receiver and is used for closing a remote modem that is located there for demodulation.

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.

This invention discloses a method for realizing superior position of signals for locomotives , in which, a locomotive-carried digital transmission broadcast station and a station ground digital transmitted broadcast station are applied for the wireless locomotive signals to make up of a wireless channel so as to get signals and entry information from the chain interfaces directly to set up a corresponding relation between the train and entry combining with the train position to form signal information to be sent to the locomotive via the channel to be compared with the feedback signal to determine the effectiveness of the signals, which utterly breaks away from the restrict of railway circuit, interference of adjacent lines and half intrusion.

A system for managing the simultaneous operation of a plurality of radio modems in a single wireless communication device (WCD). The multiradio control may be integrated into the WCD as a subsystem responsible for scheduling wireless communications by temporarily enabling or disabling the plurality of radio modems within the device. The multiradio control system may comprise a multiradio controller (MRC) and a plurality dedicated radio interfaces. The radio interfaces are dedicated to quickly conveying delay sensitive information to and from the radio modems. The modems may further include control features that take information from the MRC as an input in determining the priority of messages to be sent out to a receiving device. Uplink and/or downlink operations might, for instance, be performed. Instruction that operation can commence prior to an assigned time period might, for example, be provided. Channel contention might, for instance, be initiated in response to the instruction.

Allocation of a wireless communications system channel resource is managed by utilizing traffic segment allocation. This is realized by partitioning the channel resource into an assignment channel and a traffic channel in a fixed manner. The assignment channel includes assignment segments and the traffic channel includes traffic segments. The traffic segment is the basic traffic channel resource unit used to transport traffic data and has a prescribed finite time interval and bandwidth. Each traffic segment is associated with a so-called assignment segment in a prescribed manner. One or more traffic segments may be associated with a particular assignment segment. A base station broadcasts via an assignment segment which wireless terminal is to use a particular traffic segment. This is realized by transmitting a simply identifier for the particular wireless terminal assigned to the particular traffic segment in the assignment segment. Then, each active wireless terminal monitors all of the received assignment segments to detect any traffic channel assignments. Once a wireless terminal detects its identifier in an assignment segment, it proceeds to receive/transmit the traffic data in the traffic segment associated with the assignment segment including the detected identifier.

A method and apparatus attempt to connect Wi-Fi direct devices with each other and quickly recognize a cancellation of a connection when the connection is cancelled. The method includes performing a provision discovery process with a counterpart Wi-Fi electronic device, performing a group owner negotiation process with the counterpart Wi-Fi electronic device, and sending a cancellation notification to the counterpart Wi-Fi electronic device when connection with the counterpart Wi-Fi electronic device is ended.

The Spread Spectrum integration coherent receiver of the invention employs a time division multiplexing correlator bank and thus obtained coherent channel evaluator as a core. The receiver can execute initial PN synchronization, RAKE diversity coherent combination, AFC and adjacent cell search and combination receipt, and soft handoff. Further, “part capture in parallel based on slide energy window” and “tracking loop based on energy window barycenter” are introduced into the receiver of the invention, thereby simplifying the structure of the RAKE receiver. The receiver is capable of overcoming multipath fading, ensuring the RAKE receipt performance.

The invention provides a beam processing method, a base station and a terminal. The beam processing method comprise the steps of receiving a first beam report reported by the terminal, wherein the first beam report includes the identification of a first preset number of transmitting beams; selecting a second preset number of transmitting beams from the first preset number of transmitting beams according to terminal capacity information or identification of a receiving beam group which is included in the first beam report and corresponds to each of the transmitting beams, wherein both the firstpreset number and the second preset number are greater than or equal to 2; and transmitting information of the second preset number of transmitting beams to the terminal, and transmitting a control channel and a data channel through the second preset number of transmitting beams, thereby being capable of improving the link recovery speed, reducing the time delay caused by the link recovery, and improving the user experience.

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 communication terminal has an EVDO radio control section which performs radio communication control based on an EVDO communication system, and a data communication control section which releases a data link and requests the EVDO radio control section to release a communication session if a power-off command is entered. The EVDO radio control section releases the communication session in response to the communication session release request made by the data communication control section. When the EVDO radio control section releases the communication session based on a command for a power-off processing, the EVDO radio control section maintains the communication session released. When the EVDO radio control section releases the communication session based on any command other than the command of the power-off processing, the EVDO radio control section performs the reconnection processing of the communication session.