70results about How to "Reduce communication quality" patented technology

The antenna matching circuit control device with an antenna body includes a sensing module, a processing module, a power adjusting module and a frequency adjusting module. The sensing module senses an object that approaches the antenna body and outputs a sensing signal accordingly. The processing module is coupled to the sensing module and outputs a first control signal and a second control signal according to the sensing signal. The power adjusting module is coupled to the processing module and controls a power amplifier to couple with one of a plurality of first matching circuits according to the first control signal. The frequency adjusting module is coupled to the antenna body and the power adjusting module. The frequency adjusting module controls one of a plurality of second matching circuits to couple with one of the first matching circuits according to the second control signal.

A radio communications system includes at least one terminal communication unit having one antenna that conducts a radio communication with a plurality of terminals; and at least one baseband modem that generates and decrypts a data signal, a cell being configured by at least one of the antenna, wherein the baseband modem divides a radio frequency band used for the radio communication into two or more subbands, generates and decrypts the data signal specific to each of the divided subbands, and allocates the data signal specific to the subband to the terminal communication unit, and wherein the terminal communication unit receives the data signal specific to the subband generated by the baseband modem, and forms the cell of each the subband by the data signal specific to the received subband.

A UE does not immediately perform handover after receiving a handover command from a serving base station, but instead backups that message and continuously compares the signal strength of a serving base station and the signal strength of a target base station and performs a handover to the target base station at the best timing when handover is required. Once the timing of handover is determined, the UE transmits a handover indication message to the serving base station, and thereafter the UE performs a handover to the target base station.

A method and apparatus for deciding whether the handover has to be done or not, where the decision is taken by the mobile unit. The mobile unit can reject the command from the base station if the quality of the communication might not be maintained in the second network. This decision is taken measuring some quality parameters of the second network and comparing them with a predefined threshold.

A method for re-routing communications based on link quality includes establishing a first wireless communication link with a mobile station. The first wireless communication link is included in a first communication path used for communications between the mobile station and a destination device. The method also includes monitoring, from the mobile station, the link quality of the first wireless link and determining, at the mobile station, that the link quality of the first communication link has decreased below a low link quality threshold. The method further includes routing, using a router at the mobile station, communications between the mobile station and the destination device to a second communication path that includes a second wireless communication link to the mobile station. The second communication path is selected by the router based on one or more metrics.

In a GPON system conforming to ITU-T Recommendations G.984.3, an optical line terminal is provided which has an active bandwidth allocation function that preferentially puts small bandwidth signals in a particular segment of a frame, e.g., at a head of the frame, to prevent fragmentations that may occur particularly when allocating small bandwidths of about 100 kbits/s.

To effectively utilize an infrastructure communication channel and increase a number of channels available for ad-hoc communication in a mobile communication apparatus enabling communication in an infrastructure communication mode for radio communication via a base station and in an ad-hoc communication mode for direct radio communication with another mobile communication apparatus, by providing a communication channel recognizer to recognize an infrastructure communication channel which does not interfere with an infrastructure communication within a radio service area of a base station, from among the infrastructure communication channels assigned for the infrastructure communication and a communication channel diverter to control utilizing a infrastructure communication channel, recognized by the communication channel recognizer, as a channel for the ad-hoc communication mode.

A traffic control system 100 includes: a quality measuring unit 110 that measures communication quality on a communication line A between a relay server 300 and a client terminal 400; an upstream specifying unit 111 that specifies an amount of streaming data, in a communication line B between a video streaming server 200 and the relay server 300, corresponding to an amount of screen information of a communication data amount accepted for the measured communication quality a of the communication line A; and an upstream control unit 112 that performs control such that an amount of video data to be distributed to the relay server 300 from the video streaming server 200 via the communication line B can be adjusted to the specified amount of streaming data.

A mobile communication device includes antennas, transmitting units, and receiving units. A baseband processing unit of the mobile communication device transmits data signals to a base station device through a receiving unit and an antenna that are selected based on an instruction received from the base station device. The baseband processing unit transmits reference signals to the base station device through the transmitting units and the antennas while preventing transmission frequencies of the reference signals from overlapping one another. A baseband processing unit of the base station device transmits, to the mobile communication device based on qualities of the received reference signals, a signal indicating information concerning which of the antennas and the transmitting units of the mobile communication device are used for transmitting the data signals, the signal also indicating information concerning whether or not to make the transmitting units and the antennas share transmission of the reference signals. Thus, interferences due to degradation of communication quality and to an increase in the number of reference signals can be prevented.

The invention discloses a ground-air wideband communication switching method and system under a high-speed moving condition. The ground-air wideband communication switching method comprises the following steps that: a current base station acquires aircraft position information and aircraft posture change information from aircraft-mounted terminal equipment; the aircraft-mounted terminal equipment measures and reports the signal quality of the current base station; the aircraft-mounted terminal equipment starts to measure a transmitting signal of a neighboring base station and reports the signal quality of the neighboring base station according to the signal quality of the current base station or a switching measurement request sent by the current base station; the current base station performs cross-region switching from the current base station to the neighboring base station according to the aircraft posture change information, the signal quality of the current base station and the signal quality of the neighboring base station. According to the ground-air wideband communication switching method and system disclosed by the invention, an effective switching decision can be made when the signal strength received by a terminal becomes weak according to position information and gesture information of an aircraft, so that performance reduction caused by ping-pong effect and too late switching decision can be avoided, in-time, effective, quick and smooth switching can be realized, and therefore service quality of ground-air wideband business is finally ensured.

The invention discloses a CDMA soft handover method which can be used in present code division multiple access systems. The invention preserves current soft handover mechanisms triggered by a pilot signal strength variation measured by a mobile station. At the same time it introduces a communication quality indication parameter—continuous error frame indication measured by mobile station. Both function together to launch and to activate system soft handover. Without changing present soft handover processes, soft handover performance is improved, possibility of lost conversation is decreased and communication quality is raised.

The invention discloses wireless communication equipment. A first antenna and a second antenna are arranged on the wireless communication equipment. The electrical length of the first antenna is N times of that of the second antenna, and N is an integer larger than or equal to one. The first antenna and the second antenna are arranged on a printing circuit board in a common ground connection mode, namely, the first antenna and the second antenna share the same grounding point, so that the input impedance of the grounding point of the first antenna and the grounding point of the second antenna is reduced, and energy fed through the antennas is made to be distributed in a relatively even mode in the horizontal direction and the perpendicular direction of the printing circuit board. Consequently, SAR is reduced on the condition that the communication quality of the wireless communication equipment is not reduced.

The invention provides an urban vehicle-mounted network moving switching method based on IPv6 (Internet Protocol Version 6). An urban vehicle-mounted network comprises a boundary router, an access router, access nodes and a vehicle node, wherein the boundary router serves as the boundary router of the urban vehicle-mounted network to be connected with a backbone network of the internet; the whole urban vehicle-mounted network is covered by all the access nodes, and all the access nodes are connected with one access router; the access router is connected into the internet through the boundary router; and the vehicle node is connected into the internet through the access nodes within an one-hop range.

A switching server 100 relays VoIP packets transmitted from a cellular phone terminal 300A to an IP phone terminal 42, and sequentially acquires the receiving times of the VoIP packets received from the cellular phone terminal 300A. In addition, the switching server 100 switches a communication route R1 via a radio IP network 10A to a communication route R2 via a radio IP network 10B, on the basis of the multiple receiving times thus acquired.

The invention provides a method and device for controlling power. The method comprises the steps that information which is transmitted by a neighborhood base station and used for expressing the interference-to-noise ratio IOT level of the neighborhood is received; the interference threshold of UE in a local cell is adjusted by using the information expressing the IOT level of the neighborhood; according to the interference threshold, the target signal interference-to-noise ratio of the UE is determined; the uplink power of the UE is controlled by using the target signal interference-to-noise ratio. The method and device for controlling the power lower the interference of the uplink power to the neighborhood and improve communication quality.

When there is a connection request to a base station supporting adaptive modulation from a terminal supporting adaptive modulation, the base station measures a D wave level that indicates communication environment of the transmission path. When the measured D wave level is not lower than a threshold value of D wave level at which communication is possible by a modulation method (16QAM) having larger multi-value number, the base station permits allocation of a wireless channel to the terminal. Therefore, even when the modulation method is switched from one having smaller multi-value number (π/4 shift QPSK) to one having larger multi-value number (16QAM) during communication after channel allocation to the terminal, degradation of communication quality due to the communication environment of the transmission path can be prevented.

The invention provides a transmitting power adjustment method based on group user terminals and a base station. The method comprises the following steps: after a downlink radio link failure message sent by a first group user terminal of a first group is received, first transmitting power which is currently corresponding to the first group is increased to obtain second transmitting power, and the second transmitting power remains unchanged within a specified time; the number of group user terminals in the first group which send downlink radio link failure messages within the specified time is counted, and power adjustment proportion is obtained according to the counted number and the total number of the group user terminal in the first group; and the second transmitting power is adjusted according to the power adjustment proportion. By the technical scheme, downlink communication quality of the group user terminals is guaranteed by appropriate adjustment of the transmitting power, and waste of resources which is caused by frequent reconfiguration of resources is minimized.

A network management system includes: wireless link quality information collection means for collecting, from a mobile terminal that is connected to the mobile communication network, wireless link quality information that indicates wireless link quality measured by the mobile terminal, the wireless link quality information containing information about quality of wireless links between the mobile terminal and two or more wireless cells; coverage evaluation means for evaluating the wireless cell coverage on the basis of wireless link quality information calculated for each of the wireless cells using the wireless link quality information collected by the wireless link quality information collection means; and wireless parameter calculation means for calculating an amount of change in changing for a wireless parameter of a wireless base station on the basis of the result of the evaluation provided by the coverage evaluation means.

The invention discloses a processing method in a random access processing and a terminal realizing random access. A terminal device judges whether the first step access is the first step access of another entering. If so, the power of the bougies being about to be sent out accessed in the first step are confirmed according to the access bougies successfully sent out at last time; or not, the power of the access bougies being about to be sent out are confirmed according to the initial power and finally the access bougies are sent out to the network side with the confirmed power. In the invention, when the terminal device renewedly carries out the first step access caused by the failure of the second step access, the terminal device does not send out a plurality of access bougies to the network side based on the initial power like the existing mode, but sends out the access bougies by selecting suitable power to lead the access bougies sent out by the terminal device can be recognized by the network side as soon as possible thereby having shortened the time for a terminal device to access into a wireless communication network so as to realize the rapid access of the terminal device.

The invention discloses a high-precision atmospheric turbulence mismatch compensation method in a spatial chaotic laser secret communication system, and aims to solve the problems that a downlink of aconventional spatial chaotic laser communication system is influenced by a light intensity flicker effect caused by atmospheric turbulence, so that signals of a receiving end and a transmitting end are mismatched, the signal quality becomes poor, and serious error codes are caused. In order to compensate for mismatch caused by a light intensity flicker effect, improve the atmospheric interferenceresistance of a communication system and reduce the bit error rate of the system, the invention provides a method for performing mismatch compensation by taking a laser signal emitted by an existingoptical tracking and pointing subsystem in the system as a reference. According to the method, an on-board terminal does not need to be additionally launched, the number of devices needed for achieving compensation is small, the requirement for satellite miniaturization can be met, and the cost is relatively low.

The embodiment of the invention relates to a dynamic regulation method and system for a Bluetooth audio. The method comprises the steps of: acquiring a current application scene, and configuring encoder parameters according to an acquired result; monitoring real-time communication quality, and if monitoring that the communication quality becomes poor, executing a strategy for avoiding sound jamming; and after executing the strategy, if monitoring that the communication quality is improved and when an improvement quantity of the communication quality reaches a preset threshold, starting up an internal timer, and according to timing of the internal timer, regulating an audio encoding rate and a radio frequency transmission power. According to the technical scheme provided by the invention, tone quality of the Bluetooth audio can be promoted, time delay can be reduced, connection stability can be reinforced and use time can be prolonged.