34results about How to "Achieve lossless switching" patented technology

This invention discloses a base station switching method including: setting the automatic repeat request L1 cache in the media access control layer of base station and the L2 one in the Packet Data Access Gateway convergence protocol layer, and installing the switching preparation and decision threshold in the measurement module. When the measurement report from source base station to judge user' s equipment reaches the switching preparation threshold, it maintains the synchronization of two-level cache. When the measurement report reaches the switching decision threshold, it sends to the target base station the protocol data unit of packet data convergence protocol layer in L2 cache, and carries completing signs on the final packet. The target base station receives the above data unit in the L1 cache, and deals with them to be media accessing to the control layer protocol data unit. After completing the corresponding treatments, the target station requires to access Gateway to carry switching operation.

The invention provides a communication switching method and device. The communication switching method comprises the following steps: determining a target base station from all first base stations according to the information after obtaining signal quality parameters of a source base station, signal quality parameters of each first base station and load of each first base station for source base stations and first base stations which are accessed into a core net based on a 5G mobile communication technology; and sending switching request to the target base station, sending switching order information to the terminal after receiving switching request conformation information sent by the target base station for indicating the terminal to switch to the target base station from the source base station, thereby realizing communication switching under the 5G mobile communication technology. In a communication switching process, switching request carries service quality flow related information, so that the source base station and the target base station can adopt same service quality flow related information to perform mapping of service quality flow, and therefore, loseless switching of service quality flow can be realized in a process of switching the terminal to the target base station, and continuity and service quality of communication are improved.

The embodiment of the invention provides a data forwarding method in a relay network, a device and a system. The method comprises the steps of performing grouped data aggregation protocol encapsulation on a service data unit corresponding to an unconfirmed first protocol data unit of user equipment, to obtain a second protocol data unit, and sending the second protocol data unit to a target base station, so as to ensure that the target base station obtains the service data unit and a serial number according to the second protocol data unit, and sequentially deliveries the service data unit to the user equipment according to the serial number. The device comprises an encapsulated module and a first transmitting module. The system comprises a source relay node and the target base station. The embodiment performs PDCP (Packet Data Convergence Protocol) encapsulation on the unconfirmed data of UE and then forwards the unconfirmed data of UE to the target base station, and deliveries the unconfirmed data of UE through the target base station, so as to realize the lossless switching between the source RN and the target base station.

The invention discloses a data forwarding method, a base station and a relay station. The data forwarding method comprises the following steps of: receiving a switch command message sent by a mobility management entity, wherein a user device identification is carried in the switch command message; establishing a forwarding data channel corresponding to the user device identification; sending a connection re-distribution message to the relay station, wherein a channel identification corresponding to the forwarding data channel is carried in the connection re-distribution message so that the relay station is beneficial to sending a data packet of a user device through the forwarding data channel corresponding to the channel identification; receiving the data packet sent by the relay stationand sending the data packet to the target base station. The data forwarding method provided by the embodiment of the invention can be used in a relay scene so as to realize lossless switch of the user device from the relay station to the target base station, thereby improving the service quality of a communication system in the relay scene.

The invention provides a switching control method and device. The method comprises the following steps: the source base station sends a message used for instruction switching to terminal equipment, wherein the message includes at least one downlink first unacknowledged PDCP SDU information; the source base station sends the PDCP SDU of at least one source DRB which is not sequentially and correctly received by the terminal equipment to the target base station in the switching process of the terminal equipment; and after the terminal equipment completes the switching access to the target base station, the target base station resends the downlink PDCP SDU of the at least one source DRB which is not correctly received by the terminal equipment and starts from the SN and is indicated by at least one downlink first unacknowledged PDCP SDU information to the terminal equipment. With application of the switching control method, lossless switching of the terminal equipment in the moving process can be realized, and the business service quality of the terminal equipment in the switching process can be effectively guaranteed.

The invention discloses a business bus lossless switching method in synchronous digital hierarchy (SDH). The method includes: a. a main/spare cross board transmits business signal of a plurality of channels into a line card business processing board; b. the line card business processing board extracts clock, or frame head (FR), or payload indicator (PL) in business signal, and business data enters FIFO cache under action of the indicator signal and clock signal; c. the line card business processing board realizes data alignment in FIFO cache under action of uniform clock and FR, then, parallel transmits to a bus switch controller; d. the bus controller selects frame head A1A2 byte position, or leisure spending position in SDH frame structure, or pointer byte position in administrative unit (AU) for processing business bus switching. The business bus lossless switching method can eliminate time delay and phase separation when business bus switching, and increase SDH business protection reliability.

The invention relates to the field of data communication networks, and in particular relates to a service convergence method, a service convergence system, equipment and a medium. A forwarding serveror network equipment carries corresponding BGP routing information via a first RouterAS extension group attribute parameter, and sends the same according to a preset period, so that the data transmission condition of each flow path is annunciated in an overall manner, and thus a monitoring server can determine corresponding second BGP routing information for a request data packet accordingly. Thenthe monitoring server can set a second RouterAS extension group attribute parameter, and sends the parameter to the corresponding forwarding server of network equipment via a second BGP Update message, so that the monitoring server can continuously forward the parameter according to the second RouterAS extension group attribute parameter. The network equipment does not need to delete a route andperform routing convergence, so that the service routing convergence speed is improved.

The invention provides a switching control method and device and a base station, and the method comprises the steps: transmitting a switching request message to a target base station, receiving a switching request confirmation message transmitted by the target base station, or receiving a switching rejection message transmitted by the target base station; after a switching request confirmation message sent by the target base station is received, sending a switching command for indicating the terminal to be switched to the target base station to the terminal, sending an SN state report to the target base station according to the first mapping relation and the second mapping relation, wherein the SN state report carries the SN of the next protocol data unit PDU to be transmitted. According to the embodiments of the present invention, the second mapping relationship is obtained through the switching request acknowledgement message, and the SN state report is sent to the target base station according to the first mapping relationship and the second mapping relationship, so that the target base station uses the same SN to ensure the continuity of data transmission, and lossless switching between base stations is realized.

The invention provides a method for realizing LCAS protocol nondestructive switching, wherein data nondestructive switching of LCAS protocol can be realized without the additional high-level user defined protocols, and an operation mode of main page and standby page is adopted, the equipment works on the main page, and the standby page is for modification by LCAS control frame and mapping table items. The invention solves the problem of cooperation between the LCAS control frame and mapping table items with the data frame.

The invention discloses a constant voltage and constant current control circuit and a constant voltage and constant current switching compensation method. The method includes utilizing a constant current error amplifier (CCEA) to generate a constant current signal, utilizing a constant voltage error amplifier (CVEA) to generate a constant voltage signal, receiving the constant current signal and the constant voltage signal to control a controlled system, compensating current extracted by the CCEA from the CVEA in a period that the controlled system works in a constant voltage status and output current is approximate to a constant current value, and compensating current provided by the CVEA to the CCEA in a period that the controlled system works in a constant current status and output voltage is approximate to a constant voltage value. The constant voltage and constant current control circuit has the advantages that starting from basic reasons for interference in a switching period from the CCEA to the CVEA, output of the CCEA and the CVEA in a constant voltage and constant current switching period is compensated, so that a current range of non-constant voltage and non-constant current in the constant voltage and constant current switching period is eliminated, and the circuit can realize lossless switching between constant voltage and constant current.

A data processing method and apparatus is disclosed by the embodiments of the present invention. The method includes the following steps: on demand of handing over to a target system with different numbering ways of PDCP sequence numbers, determining the PDCP data packets waiting for being re-numbered; then re-numbering the PDCP data packets waiting for being re-numbered, and enabling the re-numbered PDCP sequence numbers to be in the support range of the target system. The embodiments of the present invention enable UE to implement lossless handover when handing over among the different systems with different numbering ways of PDCP sequence numbers.

The invention provides a technical scheme. After a sending end receives a link switching trigger instruction, the first N numbered data packets in the data stream are transmitted through a first transmission link, the remaining data packets are transmitted through a second transmission link; the serial numbers of the data packets are set according to the sequence of the data packets in the data stream; therefore, the receiving end receives the serial number of the data packet, whether the first N data packets are completely received or not can be confirmed, namely, under the condition that thereceiving end receives the data packets with the number of N+1 from the second transmission link, if the receiving end receives the data packets with the first N numbers from the first transmission link, the switching control end is informed, and then the switching control end indicates that switching is completed. Therefore, the link switching of the data packet on the first transmission link before the transmission is completed can be avoided, the loss of the data packet is avoided, and the lossless switching of the bandwidth is realized.

The invention discloses a main and standby rearranging method based on an object, which relates to the main and standby rearranging technology in the communication system and is provided for solving the information flow loss in the prior main and standby rearranging mechanism. The adopted technical scheme is as follows: before processing the received information, the main part backs up the information and the context of the information to the standby part and informs the standby part to set the information in a state to be processed; after the information is processed, the data relating to the information processing is backed up to the standby part, and the standby part is informed to set the information into a processed state; when the main part is switched, the information with the state to be processed is found out, and the information to be processed is processed with priority. The invention provides perfect information flow rearrangement, can not cause the disorder of communication data and guarantees the reliability of the communication system.

The invention relates to a power supply switching circuit and an intelligent door lock, the power supply switching circuit comprises a first voltage detection unit, a second voltage detection unit, a first switch unit and a second switch unit, a first input end of the first voltage detection unit is coupled with a first power supply, a second input end of the first voltage detection unit is coupled with an output end of the power supply switching circuit, and a second input end of the second voltage detection unit is coupled with a second power supply; the output end is coupled with the control end of the first switch unit; the first input end of the second voltage detection unit is coupled with the second power supply, the second input end of the second voltage detection unit is coupled with the output end of the power supply switching circuit, and the output end of the second voltage detection unit is coupled with the control end of the second switch unit; the first end of the first switch unit is coupled with the first power supply, and the second end of the first switch unit is coupled with the output end of the power supply switching circuit; the first end of the second switch unit is coupled with the second power supply, and the second end of the second switch unit is coupled with the output end of the power supply switching circuit. By adopting the scheme, lossless switching between the first power supply and the second power supply can be realized.