72results about How to "Reduce the probability of dropped calls" patented technology

A communication system, user device thereof, and a synchronization method thereof are provided. The communication system includes a user device and a wireless network. A ciphering configuration information is transmitted to a user device. The user device and wireless network re-establishing the radio link control (RLC) entity of logical link. The user device changes to the new ciphering configuration immediately following the re-establishment of RLC entity according to the received ciphering configuration information and the wireless network changes to the new ciphering configuration.

The invention relates to wireless fidelity (WIFI) network optimization based on a complex environment. The WIFI network optimization is characterized by comprising a step S01 of detecting the field intensity signal to noise ratio of a to-be-optimized area, and if the measured field intensity is smaller than 100dBM, adding covering points, adding mounted type access point (AP) devices or using high-power AP devices for hot spot areas where signal coverage does not meet an index; a step S02 of detecting the same adjacent channel interference of the to-be-optimized area, and if a detected interference source is between 0dBm and 80.00dBm, performing frequency point adjustment, adopting no more than 3 common-frequency APs to perform networking, and enabling upstream throughput of each AP to be larger than 4M access bandwidth; for a high-business-volume area, starting a 5.8GHz frequency band to close AP automatic frequency regulation and automatic power control switches to give priority to access to an indoor system, and adopting a channel multiplexing technology to allocate channels. The WIFI network optimization can be achieved, a wireless access device can cover all areas expected to be covered, and the capability of adequately bearing an expected load is provided.

The invention discloses a data transmission method. The method includes the steps that a first data packet is sent to a data receiving device through a UDP link; at the overtime detection moment, whether the confirmation response of the first data packet returned by the data receiving device is received or not is detected; the confirmation response of the first data packet shows that the first data packet is received by the data receiving device; if it is detected that the confirmation response is still not received after exceeding preset duration, a request is made to the data receiving device, and a TCP link is established; a second data packet is sent to the data receiving device through the UDP link and the TCP link. The invention further discloses the other two data transmission methods, a data transmitting device, the data receiving device and a data transmission system. By means of the data transmission method, data transmission smoothness can be improved, and transmission quality is optimized.

The invention provides a method for base stations under the same routing area to share tunnel resources, which comprises the following steps that: a terminal is switched to a new base station under a new routing area from an original base station under an original routing area; a tunnel is established between the original base station and the new base station and is subject to link maintenance through a heartbeat message; simultaneously the original base station informs the new base station of a base station list under the original base station and synchronously updates the base station list; the base stations under the same routing area mutually inform of the tunnel load conditions of the base stations; when the load of the original base station is extremely-heavy, the original base station analyzes the tunnel load conditions of other base stations under the original routing area and shares partial load per se to the base stations with low current load; and when the new base station does not receive the heartbeat message of the original base station for a long time, the new base station transmits messages to other base stations under the original routing area and requests the other base stations to take over the tunnel of the original base station. The method can ensure that tunnel loads of various base stations are balanced and the off-line rate of users can be greatly reduced by the timely transfer of the tunnel resources even if a certain base station is abnormal.

The invention discloses a switching method and a device of a serving cell of a mobile terminal. The method comprises the following steps: determining the number of the switched serving cells in the set time interval closest to the current time by the mobile terminal; lowering the switching threshold of the mobile terminal to be less than the set switching threshold when the determined quantity isgreater than the set quantity threshold value; and switching the serving cell of the mobile terminal to the adjacent cell when the detected switching index of the cell adjacent to the current servingcell of the mobile terminal reaches the switching threshold of the mobile terminal. The adoption of the method and the device provided in the invention reduces switching dropping rate of the serving cell when the mobile terminal is in high-speed motion.

The invention discloses a wireless admission control method and a device and relates to the field of wireless access. The wireless admission control method includes the steps: adopting a Rice fading model to confirm a bit error rate according to a mobile speed of a user requesting for accessing to network, confirming a bit speed of the user requesting for accessing to the network according to the bit error rate and a request data speed, and confirming whether to admit the user requesting for accessing to the network or not according to the size relationship between a sum of a bit speed of a user accessed to the network and the bit speed of the user requesting for accessing to the network and transmission capacity of a community. The wireless admission control method and the device capable of considering affects of the bit error rate to the data speed during high-speed mobile of the user and guaranteeing quality of business service.

The embodiment of the invention provides a radio resource control (RRC) re-establishment processing method which comprises the steps of receiving a radio resource control (RRC) re-establishment request message sent by a terminal; inquiring whether the context of the terminal is available; judging whether the terminal is in an RRC switching process or not if the context of the terminal is available; judging whether the RRC reestablishment request message sent by the terminal carries target cell information or not if the terminal is in a switching process; and judging whether to perform re-establishment processing on the terminal according to the pre-obtained target cell information and the target cell information in the RRC reestablishment request message if the RRC reestablishment requestmessage sent by the terminal carries the target cell information. A source base station does not directly send an RRC reestablishment rejection message to a UE, so that the wire dropping rate of the UE in the network is reduced, and the user perception is improved.

The embodiment of the invention discloses a base-station-signal-quality-based base station selection method. The method comprises: channel statistic information uploaded by a reference user terminal is received, wherein the channel statistic information includes connection losing rates or disconnection rates of base stations and channels of connection between a reference user terminal and the base stations; according to the channel statistic information, average connection losing rates or average disconnection rates that correspond to all base stations are calculated; a base station with the average connection losing rate or disconnection rate larger than or equal to a threshold value is searched; and according to the average connection losing rate or disconnection rate, a channel evaluation report is generated and is issued to a target user terminal under jurisdiction of the searched base station, and the target user terminal determines switching or reselection based on the channel evaluation report. In addition, the embodiment of the invention also discloses a base-station-signal-quality-based base station selection apparatus. Using the method and apparatus provided by the invention, connection of a base station with a signal fault can be avoided and the communication quality of the terminal is improved.

A mobile communication terminal and a control method thereof are provided, where a plurality of antennas receives signals from systems having different frequency bands and a plurality of system modems communicates with the systems having the different frequency bands, respectively. A switching unit positioned between the plurality of antennas and the plurality of system modems selectively connects the plurality of antennas with the plurality of system modems. In a handover between the systems having the different frequency bands, a controller controls the switching unit to connect the system modem of a handed-over system to a predetermined one of the plurality of antennas.

The invention provides a heterogeneous cellular network switching selection method oriented on energy saving of a terminal. The heterogeneous cellular network switching selection method comprises the following steps that: (1), the terminal measures the signal strength of a service base station and an adjacent base station according to a measurement rule; when a switching trigger event occurs, a measurement report is reported to the service base station; and the measurement report includes the signal strength of a candidate base station; (2), the service base station requests for obtaining the transmitting power and the interference noise power of the candidate base station from the adjacent base station; (3), the terminal transmitting power of the connected candidate base station is obtained according to a pre-set channel lowest signal-to-interference-noise ratio, the signal strength of the candidate base station and the transmitting power and the interference noise power of the candidate base station; and (4), a target switching base station is selected from the candidate base station according to a switching strategy including the transmitting power of the terminal. The invention further provides a heterogeneous cellular network switching selection system oriented on energy saving of the terminal.

The invention provides a community switching method and a base station. The community switching method comprises the steps that a first RSRP value measured by a user terminal UE and corresponding to the service community, and a second RSRP value corresponding to the target community can be received; the first RSRP value and the second RSRP value are respectively inserted with the corresponding punishment value so as to obtain a third RSRP value corresponding to the service community and a fourth RSRP value corresponding to the target community; if the third RSRP value and the fourth RSRP valueaccord with the switching condition of the preset community, the UE will be switched from the service community to the target community. The invention is advantageous in that when the user terminalsrapidly moves between the service community and the target community, fast uploading and downloading rate can be maintained, and the probability of power down at the user terminal can be effectively reduced; the switching success rate of the user terminal between the service community and the target community can be raised, and user experience can be further improved.

The invention relates to the technical field of electric power, in particular to a transformer oil chromatogram gas cylinder automatic switching system, and further relates to a switching method. Thetransformer oil chromatogram gas cylinder automatic switching system comprises at least two gas cylinders, a control device and a gas outlet, a valve controller of each gas cylinder is connected withan input port of the control device, the gas outlet is connected with an output port of the control device, and data transmission can be achieved between the control device and a PMS. Through the method, the gas cylinder state can be automatically monitored online, the operation of automatically switching to standby cylinders can be achieved, so that manual operation is reduced, and the time is saved.

The invention discloses a method and a device for automatically determining whether a user terminal supports small-rate business. The device comprises an RNC (radio network controller) and a detection device mounted on the RNC, wherein the detection device is used for detecting the user business type, terminal capability, and small-rate business threshold. The user terminal meeting the small-rate business will migrate to a small-rate channel (FACH (forward access channel) channel) to conduct small-rate business. When a user initiates a large-rate business, the user terminal can report a 4a acceleration event through the existing mechanism to adjust the rate, and then migrates to a high-rate channel (DCH / HS (dedicated channel / high speed) channel) from the small-rate channel (FACH channel). After the small-rate business terminal migrates to the FACH channel, the high-speed DCH / HS channel is spare to facilitate access of more users, thereby improving the utilization rate of network resources, effectively obviating occurrence of abnormal conditions of the terminal due to the poor capability of equipment, such as connection failure, ensuring the user experiment, and effectively improving the network capability.

A communication system, user device thereof, and a synchronization method thereof are provided. The communication system includes a user device and a wireless network. The wireless network transmits a RRC re-configuration message containing ciphering configuration information to a user device on a logical link. The user device suspends all measurement operation transmitting measurement report after receiving the RRC re-configuration message. The user device changes to a new ciphering configuration according to the RRC re-configuration message, and the wireless network changes to the new ciphering configuration. The user device transmits a RRC response message to respond the RRC re-configuration message to the wireless network. The user device resumes the measurement operation after changing to the new configuration.

The invention provides a cell switching state under high-speed mobile state and device thereof. The method comprises the following steps: sending a first message to a first management center, whereinthe first message is used for indicating that the terminal equipment is in a high-speed mobile state, the first management center is used for managing multiple second management centers, and the second management center is used for managing multiple base stations; sending a second message to the first management center, wherein the second message is used for determining a next entered target cellof the terminal equipment by the first management center; receiving a third message forwarded by the current base station corresponding to the current cell, wherein the third message carries an identifier of the target base station; and establishing the connection with the target base station corresponding to the target cell in advance in the premise of connecting the terminal equipment with the current base station corresponding to the current cell. The pre-connection between the terminal equipment and the target base station can be realized, the communication resource of the target cell is occupied in advance, thereby avoiding the offline phenomenon existing in the cell switching at high-speed mobile state, and the offline probability of the terminal equipment is lowered.

A configuring method of connecting identification is disclosed in the present invention, in Wimax, a network side and a cell having ascription relation with a relay station configure as relating cell set, and configuring the connecting identification group to the relay station, a terminal uses the connecting identification of the connecting identification group by a cell communication between the relay station and the relating cell set, comprising steps: the network side informs a target cell of the relay station ascription change to obligate the connecting identification group, wherein the target cell is in the relating cell set; the relay station ascription change generating, the source cell releases the connecting identification between terminals; the terminal uses the same connecting identification of the obligated connecting identification group to communicate with the target cell. Using the present invention can avoid signaling mutual generated by arranging course in redistributing connecting identification course, thereby implementing predigestion of signaling in the relay station ascription change course, furthermore reducing delay time, promoting the service quality, and decreasing the dropping rate.

Extended switching indication information sent by present service station to mobile station (terminal) trigs hard switching. In hard switching, time parameter correction is carried out before communication between mobile station (terminal) and new base station is continued. Since time parameter is corrected, rate of interrupted communication caused by hard switching is reduced greatly. Thus, the invention solves technical problems obtains technical effect, economic benefit and social benefit.