70results about How to "Reduce bandwidth overhead" patented technology

The invention discloses a system minimum storage regeneration code based local repair encoding method. The local repair encoding method comprises: constructing a storage structure and a generation matrix of a system minimum storage regeneration code; establishing a local repair encoding structure based on the system minimum storage regeneration code; and repairing a single-node fault, a two-non-adjacent-node fault and a two-adjacent-node fault in a repair group by adopting the established local repair encoding structure. According to the local repair encoding method, the system minimum storage regeneration code is adopted as a local code, and storage nodes store original data copies, so that the disk I/O expenditure and the bandwidth repair expenditure in a storage node repair process are reduced; and a redundant data part in the storage nodes is generated by minimum storage regeneration encoding data parts of two successive storage nodes, and based on the encoding structure, when the single-node fault, the two-adjacent-node fault and the two-non-adjacent-node fault exist in the repair group, fault node data reconstruction can be quickly realized through the successive nodes to recover fault node data.

A method for disrupting unauthorized communications between at least two communication devices is provided. The method comprises using an address resolution protocol (ARP) to redirect transfer of data that occurs using unauthorized wireless communication between a first wireless device and a second wireless device. In a preferred embodiment, the method maintains a layer two wireless link while the data are being redirected.

The invention relates to a named data network comprehensive routing method based on position information and content pushing, and belongs to the technical field of computer network routing optimization. The method comprises: arranging a network management server, determining the link state of each node and starting a link state timer; establishing an NDN whole network topological structure chart and starting a network topological timer; establishing a network topology application record table; establishing a matching list of the whole network data name and the content source name and startinga statistical interval timer; the user sending a position request interest packet and the network management server replying the position data packet; a user calculating a forwarding path and sendinga data request interest packet and a content source reply content data packet, a network management server evaluating data popularity and a content source pushing data name to supplement an FIB tableof an NDN node, and regularly detecting a link state to update a network topology and pushing a high popularity data name. The method is relatively low in complexity and relatively low in bandwidth overhead, and can realize rapid establishment of the FIB table and efficient forwarding of the interest packet.

The invention provides a message transmission method and device. The method is applied to first equipment provided with an acceleration card and a processor. According to the method, bandwidth overhead and data delay caused by transmission can be reduced, the method comprises the steps that an acceleration card receives a first transmission layer control protocol (TCP) message from a processor, to-be-encrypted data are carried in the first TCP message, and the to-be-encrypted data belong to secure socket layer (SSL) data; encryption information used for encrypting the first TCP message is determined according to a pre-acquired mapping relation, the mapping relation indicates a corresponding relation between an identifier of a TCP connection bearing the SSL data and encryption and decryption information, and the encryption information at least comprises an encryption algorithm and an encryption parameter; to-be-encrypted data carried in the first TCP message is encrypted according to the encryption information to obtain a second TCP message, the second TCP message is the encrypted first TCP message; And the second TCP message is sent to the second device.

A method and server system for providing application layer session routing based on network element availability. A server system (12, 18) is arranged to monitor the abilities of session control edge nodes (21A-D) within a large VoIP and Multimedia transit network (20) to handle session set-up requests. A status module (38) in the server system receives status messages (22, 24) from the edge nodes and based on these messages a selection and modification module (40, 41) selects which edge nodes (21A-D) as well as which of their associated interconnects to other networks to include in a response (5) to a routing request (4) from a source node (21A-D).

The invention discloses a data access method and equipment. The method comprises: when receiving a data query request message, an IDC queries first data version information corresponding to a user identifier in a local cache cluster and queries second data version information corresponding to the user identifier in a local database; if the first data version information is the same as the second data version information, or the second data version information is newer than the first data version information, the IDC updates user data corresponding to the user identifier in the local cache cluster via the user data corresponding to the user identifier in the local database; and the IDC queries the user data corresponding to the user identifier in the local cache cluster and returns a data query response message carrying the user data corresponding to the user identifier. The data access method in the embodiments of the invention can be used for reducing the network bandwidth cost and guaranteeing the uniformity of the user data obtained by the user, so as to greatly improve the probability of the user for querying the latest user data.

The invention discloses a hop-by-hop reliable transmission control method for an underwater wireless sensor network. Based on a digital fountain code technology irrelevant to a code rate, optimized degree distribution and recursive coding ideas are adopted, and an RLT (recursive LT) coding scheme is designed, so that rapid and efficient coding and decoding are realized; packet collision and end-to-end delay are reduced; and the network throughput is increased. Through collection of feedback information of a receiving node, the packet corruption probability of an underwater acoustic channel is accurately estimated, and the coding packet quantity of next transmission is further computed, so that the transmission overhead of extra packets is reduced. The fourth-layer reliable transmission mechanism and the second-layer medium access control mechanism of a conventional TCP/IP (Transmission Control Protocol/Internet Protocol) protocol stack are organically fused, so that block-by-block and hop-by-hop reliable transmission of the underwater wireless sensor network is realized on the basis of RLT coding, and transmission-reception conflicts, multi-transmission-single-reception conflicts and data-ACK conflicts caused by simplex communication of an underwater Modem are reduced. As an effective and practicable technical scheme, the method has a good application prospect.

A first electronic network node (110) is provided configured for a key exchange (KEX) protocol, the first network node is configured to obtain a shared polynomial (a) shared with a second network node, coefficients of the shared polynomial a being selected modulo a first modulus q, generate a private key polynomial (sk_I), coefficients of the private key polynomial being bounded in absolute value by a bound (s) generate a public key polynomial (pk_I) by computing a polynomial product between the shared polynomial (a) and the private key polynomial (sk_I) modulo the first modulus (q) and scaling the coefficients of the polynomial product down to a second modulus (p).

The invention discloses a method for selectively scanning and associating with base station in Wimax system and a base station shifting method, wherein the method for selectively scanning and associating base station includes step S1, the mobile terminal identifies a sector area according to its moving speed and direction, the angle taking the mobile terminal as starting point and formed by the angular bisector of the central angle formed by the radial pointing to the moving direction and the sector area is smaller than the preset value; step S2, the mobile terminal scans the base stations in the sector area whose signal strengths are larger than the preset value, or meanwhile conducts scanning and associating; step S3, the mobile terminal sorts the base stations to be scanned or scanned and associated according to preset parameters. The method provided by the invention effectively reduces the number of scanned and associated base stations, thus reducing cost and meanwhile associating the cycle of scanning and associating with speed, so that the costs caused by the reduction in signal and command while ensuring the effectiveness of the results of the last scanning and associating.

The embodiment of the invention provides a channel state information (CSI) measurement method and device, relating to the technical field of communication, and aiming to ensure that a receiver can also measure CSI without joining a network of a WiFi transmitter. The method includes the following steps: a CSI request device sends a first CREQ frame, wherein the first CREQ frame is used for requesting a CSI response device that receives the first CREQ frame to determine a group of session parameters for transmitting a CS frame from at least one group of session parameters, and the CS frame is used by the CSI request device to perform channel state measurement; the CSI request device receives a CRSP frame sent by a first CSI response device, wherein the CRSP frame includes first session parameters, and the first session parameters are a group of session parameters in the at least one group of session parameters; the CSI request device receives the CS frame by using the first session parameters; and the CSI request device measures the CS frame to obtain the CSI. The method is applied in positioning scenes.

The invention relates to a method for sending redundancy version parameters of hybrid automatic retransmission. A sending end sets a redundancy version RV parameter value of first transmission data as0 and sets an RV value of retransmission data as a non-zero value in an available RV set; and a receiving end takes a data packet in which the RV value is 0 as a first transmission data packet for processing, and takes the data packet in which the RV value is the non-zero value in the available RV set as a retransmission data packet for processing. The method distinguishes the first transmissiondata and the retransmission data by RV parameters, and does not use NDI so as to save the transmission of the bit of the NDI at an air interface and reduce the bandwidth overhead and transmission power overhead of the air interface.

The invention discloses a ring communication network slave node increasing and decreasing method, a device and a system. The method comprises steps: according to modified feedback frames in received feedback frames of all slave nodes, a master node determines adding network positions of to-be-added slave nodes, and according to the positions, a corresponding relationship between logic identifiers and network identifiers is modified; encoding frames with the network identifiers are sent to the to-be-added slave nodes, and the to-be-added slave nodes are indicated to modify self network identifiers to be the network identifiers in the encoding frames. On one hand, a special query frame is needed, and thus extra bandwidth overhead can be reduced; on the other hand, the feedback frames are used for acquiring information of the adding network positions of the to-be-added slave nodes, network adding of slave nodes can be completed in only one communication cycle; and thus, no packet loss during node increasing and decreasing processes of the communication system can be ensured, synchronization performance does not fall, and the communication efficiency is not reduced.

A method and apparatus are disclosed for separating the functionality of middleware (320) in a device with embedded resources (341,342) so that data transfer between embedded resources used by an object (330) resident in a general purpose processor (310) of the device takes place directly, thereby minimizing bandwidth overhead at the general purpose processor. The control interface (371,372) for an embedded resource resides in the general purpose processor and uses the device driver of the embedded resource, whereas the data interface (381,382) is outside the general purpose processor and provides direct communication with a switch matrix (360) serving each embedded resource.

The invention provides a data center network telemetering method, a data center network telemetering system, a storage medium and a telemetering server, which are used for carrying out on-demand telemetering on a data center network under the condition of meeting the requirements of full coverage and expandability. The data center network telemetering method comprises the following steps: acquiring a plurality of telemetering queries; generating a probe by using a preset probe generation algorithm and the plurality of telemetry queries; injecting each probe into the data center network, and collecting the probes from the data center network; and analyzing the collected probes to obtain a telemetry result corresponding to the telemetry query.

The invention discloses a method and system for accessing a distributed block storage system in a user mode, an access module is arranged in an LIO TCMU of a computing node, and the method comprises the following steps: after the LIO TCMU is connected with an iSCSI initiator, receiving a data reading request from a data access party sent by the iSCSI initiator through the access module; determining whether target data corresponding to the data reading request exists in a cache of the access module or not; if so, returning the target data to the data access party; and otherwise, generating a corresponding thread in a pre-configured thread pool in the access module, so as to execute the thread to request target data corresponding to the data reading request from the distributed block storagecluster and return the target data to the data access party. The functions of caching, pre-reading, writing merging and the like are added to a client, so that tasks originally processed by the server are moved to the client, the service capacity and the response speed of the whole cluster are improved, and while the access performance is improved, the bandwidth overhead of the cluster is reduced, and services can be provided for more computing nodes.

The present invention discloses a display with regional enlargement and highlighting functions, and a highlighting method thereof. The display comprises a video card, a decoding unit, a coordinate transmitting unit, a coordinate receiving unit, an area determination unit, an image enlargement unit, a down-sampling unit, a cache unit, an image stitching unit, a coding unit, and a display unit. The technical scheme of the present invention has the advantages that the attention area of the user can be enlarged, the non-attention area is down-sampled and is displayed in low brightness, the highlighting effect is reached, the image processor has a low requirement in bandwidth, and the user experience will not be affected by the down-sampling.

A system, comprising: a first host comprising a first cache and associated with a virtual machine, VM; and a second host comprising a second cache; wherein the first host is adapted to send cache dataof the first cache to the second host in response to a notification, said cache data associated with the VM and said notification indicating that the VM is to be migrated from the first host to the second host, and wherein the first host is adapted to send write operations associated with the VM to the second host in response to receiving the notification; and wherein the second host is adapted to apply, in response to receiving the notification, read operations associated with cache data of the VM to the first cache if said cache data is not present in the second cache, and to apply write operations associated with cache data of the VM to the second cache.

The invention discloses a method for distributing and obtaining a CORESET in an idle state, a base station, user equipment, and a readable medium. The method comprises the steps: configuring time andposition information of the CORESET in the idle state, wherein the time and position information includes a number of symbols occupied by the CORESET in the idle state, or a number of symbols occupiedby the CORESET in the idle state and a start position of the CORESET in the idle state, and the symbol is a symbol in a parameter set used by the CORESET; configuring the location information of theidle state CORESET in the idle state in the system frame number; transmitting the configuration information to the UE, so that the UE can select the start position of the CORESET in the idle state inthe current configuration based on the received configuration information according to a preset relation table between the number of symbols occupied by the CORESET in the idle state and the start position of the CORESET in the idle state. According to the above scheme, the method does not need to directly indicate the CORESET in the idle state, so the bandwidth overhead of signaling indicating the CORESET in the idle state can be effectively reduced.

The invention discloses a storage device data integrity protection method, a controller thereof and a system on chip, and the method comprises the steps: obtaining a safety memory access main body identifier contained in a memory access request based on the received memory access request; acquiring a memory access main body key corresponding to the security memory access main body identifier as afirst key according to a corresponding relationship between the stored security memory access main body identifier and the memory access main body key; carrying out nonlinear transformation on the first secret key to obtain a secret key related to a memory access address; the method comprises the steps of receiving a request type of a memory access request; and performing corresponding memory access operation on a first storage device, performing hash operation by adopting a preset operation mode on the basis of the second key and data corresponding to the memory access request, generating corresponding message authentication data, and storing the message authentication data for performing data integrity verification when the corresponding data stored in the first storage device is read. According to the scheme, integrity protection can be provided for the data in the first storage device.

The invention relates to a method for transmitting a streaming text. The method of the invention provides a method for directly mapping a 3GPP streaming text to a transport layer in order to realize the streaming text transmission with high efficiency and low broadband expenditure. The invention provides a method for bearing the difference text timestamp and the synchronization by a PES, which can save the expenditure of the broadband. The invention provides a method for detecting and packing a TU with different importance and different error codes CRC, which guarantees the receiving quality.

The invention provides a panoramic video transmission method and system based on node calculation. The method comprises the following steps: obtaining feedback information of a user terminal in real time through an intermediate node, calculating a user visual field region according to the user visual field information, selecting a video stream accommodating the user visual field region for splicing, and obtaining a processed video stream; selecting a transmission scheme according to the user network condition information, extracting a transmission area for the processed video stream, and transmitting the transmission area code to a corresponding user terminal; wherein the transmission scheme comprises non-redundancy transmission and redundancy transmission, in the non-redundancy transmission, the transmission area is a user view area, in the redundancy transmission, the transmission area is a user view area plus a redundancy area, and the redundancy area is calculated according to usernetwork condition information and user terminal processing capability information. By combining the feedback information of the user terminal, the processing time delay can be effectively reduced, and the bandwidth overhead is reduced, so that the consumption experience of the user is integrally improved.

The embodiment of the invention provides a virtual object display method and device and a storage medium. According to the scheme, the method comprises the steps that: the server acquires brief information of at least one virtual object, wherein at least one virtual object is located in an interest area of the virtual object corresponding to the game client; the server sends the brief informationof the at least one virtual object to the game client; and if the game client does not start the shielding function, the game client acquires first brief information from the brief information of theat least one virtual object, carries out rendering according to the first brief information to obtain a first virtual object, and displays the first virtual object on the current game interface. In the embodiment of the invention, the server sends the first brief information to the game client, so that the synchronization amount of the downlink data is reduced, the bandwidth overhead of the serveris saved, and the network performance is improved.