16 results about "Communication quality" patented technology

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.

When a terminal that is going to perform communication is newly connected, a host terminal in a communication system determines whether a connection sequence can be performed while a time slot assigned to a terminal group or not. When this determination is not mete avoiding use of the time slot enables preventing a communication period of information that should be basically transmitted by using the time slot from being hardly assured and avoiding degradation in communication quality.

The invention provides a mobile video monitoring system based on cognitive radio. The mobile video monitoring system comprises a control center and a mobile terminal. The control center is wirelessly communicated with the mobile terminal through an ISM frequency band. The control center is used for monitoring communication quality and determining whether spectrum sensing and channel switching need to be carried out or not according to the communication quality. If data transmission between the mobile terminal and the control center cannot be recovered through the channel switching, the data transmission of the mobile terminal is relayed through a relay robot. The invention further provides a mobile video monitoring method. According to the mobile video monitoring system and the method, the unfixed communication frequency band is adopted, and in the ISM frequency band, channel interference is automatically sensed and avoided, and the interference problem is solved. The wireless signal fading problem is solved through power control and relay transferring, and therefore the real-time performance and reliability of video transmission are guaranteed. The mobile video monitoring system and the method do not depend on the coverage of the commercial wireless network, and have actual application significance in video monitoring in the emergency environment, the severe environment and the unknown environment.

The invention discloses a multimedia conference realization method, device and system. A multimedia conference server carries out mixing on an uplink media stream sent by a conference terminal to obtain a downlink media stream; and the downlink media stream is sent to a gateway first, and then, the downlink media stream is distributed to conference terminals associated with the gateway through the gateway. The multimedia conference server does not need to send the downlink media stream to each conference terminal repeatedly, and the media stream only needs to be sent to the gateway related to the multimedia conference, thereby greatly reducing utilization of bandwidth resources of the multimedia conference server, effectively preventing the cases of delay, packet loss and jitter and the like of the multimedia conference, and improving communication quality of the multimedia conference.

The embodiment of the invention discloses a method for determining a target eNB in a switching process. The method comprises that: after receiving a switching request of a source eNB, an alternative target eNB feeds self real-time load information back to the source eNB; and the source eNB determines the target eNB from each alternative target eNB according to a measurement value in a measurementreport sent by UE and the load information, wherein the measurement value in the measurement report means a power value of a signal of the eNB received by the UE. The embodiment of the invention can comprehensively consider the measurement report sent by the UE and the current load condition of the alternative target eNB to determine the target eNB so as to ensure the communication quality betweenthe determined target eNB and the UE.

The invention discloses an active noise reduction system of a communication device and a noise reduction processing method of the same. The active noise reduction system comprises an identifiable signal detector, a noise detector and a signal processor, wherein the identifiable signal detector is used for detecting identifiable signals and transmitting the identifiable signals to the signal processor; the noise detector is used for detecting noise signals around the communication device and transmitting the noise signals to the signal processor; the signal processor is used for noise reduction processing of the identifiable signals according to the noise signals to obtain noise reduction processing signals; and the signal processor is respectively connected with the identifiable signal detector and the noise detector. The same noise signals doped in the identifiable signals can be neutralized or counterbalanced according to the detected noise signals so as to obtain the noise reduction processing signals. Therefore, the communication quality of audio signals can be improved, and the fidelity, the clarity and the identifiability of the audio signals can also be improved.

A BIM-based multi-type heating and ventilation pipe classifying design method comprises the following steps that I, pipelines are drawn in the Revit software; II, the pipelines are systematically distinguished; III, system types are distinguished; and IV, pipeline connection modes are distinguished. The colors of the pipelines are distinguished systematically, items are checked clearly and efficiently, the communication quality and efficiency are also improved, material loss caused by project errors is reduced, the pipelines and the connection modes are named, information is sorted advantageously, establishment and modification of a model are convenient, and in the construction and implementation stage, while the model clearly and accurately expresses the design intent, a reasonable, safe and economical building mode can be judged in the construction process.

A cellular phone includes an inner loop portion and an outer loop portion both for conducting power control. The outer loop portion includes a timer counter. The timer counter transmits a timing signal to a communication quality comparing section when a set length of time elapses. The communication quality comparing section compares a block error rate (BLER) of received data with a target BLER even when a predetermined amount of data has not been received. When the BLER of the received data is equal to or higher than the target BLER, a target signal to interference power ratio (SIR) is decreased. Accordingly, the cellular phone can decrease the target SIR even when the amount of the received data is small, and no request for an unnecessarily high transmission power is made to a base station.

The embodiment of the invention discloses a virtual mobile network method. The method comprises the following steps that: a mobile cloud terminal receives data transmitted by a terminal; data communication tunnels are established between the mobile cloud terminal and mobile cloud through at least two different mobile networks; the mobile cloud terminal judges whether the communication quality of the data communication tunnels is lower than a threshold or not; and if so, the mobile cloud terminal is switched to another data communication tunnel to perform data communication. The invention also discloses an embodiment of a virtual mobile network system. Through adoption of the virtual mobile network method and system, switching of the mobile networks can be realized.

The invention discloses a circularly polarized antenna, and the antenna comprises a dielectric plate, a first radiation patch, a second radiation patch, a coplanar waveguide feeder line and a metal floor; the first radiation patch, the second radiation patch, the coplanar waveguide feeder line and the metal floor are jointly printed on the dielectric plate; the first radiation patch and the second radiation patch are connected with the metal floor, and the first radiation patch and the second radiation patch are used for being coupled with the coplanar waveguide feeder line and the metal floor to generate circularly polarized radiation waves. The circularly polarized antenna can generate circularly polarized radiation waves, is not influenced by the Faraday rotation effect, improves the communication quality, is suitable for dielectric plates made of various materials, and has the advantages of low profile and miniaturization since the first radiation patch, the second radiation patch, the coplanar waveguide feeder line and the metal floor are arranged on the dielectric plates in a printing manner. The invention also discloses a wireless communication device which has the same beneficial effects as the circularly polarized antenna.

The invention relates to a distributed multi-branch VPN communication method and system, and a storage medium, and the method comprises the following steps: detecting the communication quality of each transit server, and calculating the link communication quality between different transit servers; responding to communication joining of the first terminal and the second terminal, searching a plurality of paths with the best communication quality between the first terminal and the second terminal according to the link communication quality between the different transit servers, and establishing a plurality of branches; and realizing the transmission mode of the plurality of branches as a VPN layer, and transmitting a link layer data packet on the VPN layer to realize communication between the first terminal and the second terminal. The multi-branch communication and the VPN layer are combined to ensure that a point-to-point communication link is not influenced by a single-point fault, ensure that the network redundancy bandwidth is fully utilized, and ensure that when a certain communication link section fails, redundancy switching can be performed without communication link breakage at all.