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

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.

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 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 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 handover method in a base station, comprising: when RNC determines that the handover in the base station needs to be performed for the UE, the base station is notified of the indication information that the source cell and the target cell share an Iub port transmission path; the base station establishes a target for the UE. The internal data flow path of the cell, according to the indication information, the Iub port transmission path of the source cell that has been established for the UE is used as the Iub port transmission path of the target cell, and it is mapped with the internal data flow path of the target cell, triggering RNC sets the Iub port transmission path of the target cell to a synchronous state; RNC triggers to set up the air interface wireless link of the target cell for the UE; UE triggers the air interface wireless link of the target cell to synchronize; if the synchronization is successful, the RNC triggers Delete the resources configured for the UE in the source cell; otherwise, the RNC triggers deletion of the resources configured for the UE in the target cell. The invention can effectively shorten the switching time.

The invention discloses an object-based master-standby switchover method, relates to the master-standby switchover technology in a communication system, and proposes to solve the loss of message flow in the current master-standby switchover mechanism. The technical solution adopted is: the master party receives the message Before processing, back up the message and the context of the message to the backup side, and notify the backup side to set the message as pending; after the message is processed, back up the data involved in processing the message to the backup side, and notify the backup side to set the message as processed Status; when switching to the main party, find out the messages whose status is pending, and process the pending messages first. The present invention provides complete message flow switching without causing communication data disorder and ensures the reliability of the communication system.

The invention relates to the field of data communication networks, in particular to a service convergence method, device, medium and system. The forwarding server or network device carries its own corresponding BGP routing information through the first RouterAS extended community attribute parameter, and sends it according to the set period, so as to globally notify the data transmission status of each traffic path, so that the listening server can use it as the request data. The packet determines the corresponding second BGP routing information. Furthermore, the listening server can set the second RouterAS extended community attribute parameter, and send it to the corresponding forwarding server or network device through the second BGP Update message, so that it can continue forwarding according to the second RouterAS extended community attribute parameter. There is no need for network devices to delete routes and perform route convergence again, which improves the speed of service route convergence.

The invention relates to the technical field of image processing, in particular to a method and a device for converting a logic picture to a bmp picture. The method comprises the following steps of: reading code stream data of the logic picture, classifying the code stream data into a plurality of original encoded data streams, and extracting row coordinate sequences; parsing the plurality of theoriginal encoded data streams to generate a plurality of RGB color value data streams; combining three color components of R, G, and B in the plurality of the RGB color value data streams to generatea row data stream; combining the row data stream to form a data stream comprising all the different rows; and receiving data of one unit row, a coordinate position where the unit row is located, and acoordinate position where a row having the same content as the unit row is located, writing the data of the unit row to the coordinate position of the unit row and coordinate positions where rows having the same content as the unit row are located, and receiving data of the next unit row to continue writing. According to the method and the device for converting the logic picture to the bmp picture, the logic picture can be converted into the bmp picture, and the problems that a bmp picture occupies a large space and a logic picture cannot be directly displayed are solved.

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 provides a method for realizing LCAS protocol nondestructive switching on host end, wherein the mapping sheet adopts two items, i.e. a main item and a standby item, the main item acts as the working page for reading by the working module, the standby item acts as the alternative page for modification by the master control module and accomplishes standby items configuration, the standby page is switched into a main page at the frame margin of the LCAS complex frame, and the original main page is switched into alternative page.