63results about How to "Improve bandwidth usage" patented technology

For improving feed-based automatic distribution of content to a mobile terminal via a mobile network, a network component (150) comprises a network-side agent (160). The network-side agent (160) manages the feed-based automatic transmission of content to the mobile terminal and is configured to periodically generate a feed request to a feed server, to receive a requested feed from the feed server in response to the feed request, and to transmit the received feed to the mobile terminal. The network component (150) may also comprise a cache memory (164) for storing copies of feeds and contents and a proxy for processing feed requests and content requests received from the mobile terminal (110).

The invention provides a highly-efficient safe outsourcing decryption method based on the attribute encryption in mobile cloud computing environment. The method comprises the following steps: system initialization; a data owner encrypting a file and uploading the file to a cloud service provider; an authorization organization generating secret keys; a third party transforming ciphertexts; and a mobile terminal user decrypting the file. According to the method, targeted for the mobile cloud computing environment, by utilizing a ciphertext policy attribute-based encryption shared data method, according to the requirement of limited operation and storage capacity of a mobile terminal, and under the premise of guaranteeing data security, a portion of complex decryption tasks are outsourced to the third party; and by utilizing outsourcing decryption, secret key decomposition technique and matching algorithm, unnecessary bilinearity pairing operation is reduced, and a reliable method is provided for the mobile terminal to carry out rapid decryption.

In a communication device for providing a communication between a user terminal and a network service provider apparatus, datalink layer information included in data transmitted from a source user terminal is read, a communication function of an existing protocol of outputting data group to a network service provider apparatus when the datalink layer information includes communication request information to the network service provider apparatus is maintained, and the data are outputted directly to a destination user terminal when the datalink layer information includes shortcut communication request information to the destination user terminal.

A safe data sharing method suitable for a hybrid cloud environment is disclosed and comprises the following steps: a system is initialized; a secret key is generated by an authorization mechanism, a data owner encrypts a file so as to generate a data ciphertext and a middle ciphertext of a secret key ciphertext, the data ciphertext is directly uploaded to a public cloud without being processed via a private cloud, the middle ciphertext of the secret key ciphertext is uploaded to the private cloud, the private cloud processes the middle ciphertext and generates the same into a complete secret key ciphertext, ciphertext conversion is conducted via the private cloud, and user data of a mobile terminal is decrypted. According to the method, in the hybrid cloud environment, data is ciphered and shared based on ciphertext strategy attributes; with limited computation and storage capability of the mobile terminal taken into consideration, the private cloud as a proxy can safely take over part of complex ciphering and deciphering tasks via use of secret key decomposition technologies and secret key negotiation technologies on a precondition that data safety is ensured, a computation burden and storage demand of the mobile terminal can be reduced, and a reliable method is provided for protecting and sharing data of the mobile terminal in a highly efficient and safe manner.

The present invention relates to distributed computerized exchange systems for trading of financial instruments. In particular it relates to a passive matching engine and an active matching engine that cooperates in handling data messages such that less bandwidth is used and so that improvement in latency can be achieved.

The invention provides a medical image file transmission system, a medical image file transmission method and a server based on a bit torrent protocol. The system comprises a central server, a tracking server and a client. The central server is used for packaging a medical image file into at least one data packet in units of series in digital imaging and communications in medicine (DICOM), making a seed file for each data packet and storing the data packets and the seed files, releasing identifiers generated by the bit torrent protocol for the data packets to the tracking server, receiving a request sent by the client and used for downloading the seed file of a specified data packet, and sending the seed file of the specified data packet to the client through a secure sockets layer (SSL) protocol, wherein one data packet corresponds to one series. The tracking server is used for storing the identifiers of the at least one data packet, storing information of the central server capable of providing the data packets and information of the client, and receiving a request sent by the client and used for acquiring information of the central server capable of providing the specified data packet and information of other clients. The client is used for issuing a request for downloading the seed file of the specified data packet to the central server, acquiring the seed file of the specified data packet from the central server through the secure sockets layer (SSL) protocol, issuing a request for acquiring information of the central server capable of providing the specified data packet and information of other clients to the tracking server according to the acquired seed file, and downloading data from the central server capable of providing the specified data packet and/or other clients according to the information acquired from the tracking server so as to acquire the specified data packet.

A method for communication includes modulating a stream of data in accordance with a voice-band modem specification, so as to generate a modulated signal. The modulated signal is up-shifted to generate a passband signal, which is transmitted over a telephone line simultaneously with a baseband voice signal.

The present invention provides a method and system that will enable a wireless telephone user to more easily download information and data by from locations accessed via a communication network. This invention accomplishes this task by expanding the bandwidth of the receiving telephone device such that the bandwidth is sufficient to receive the transmitted data. The present invention expands this bandwidth at the receiver location by combining the bandwidth of the additional wireless telephones with the bandwidth of one requester telephone and receiving a portion of the information at each of the wireless telephones.

A loop method for determining transmission orders of asynchronous packets includes the steps of: classifying the asynchronous packets into a number of groups according to their lengths; and judging whether a length of a packet belonging to a longest-length packet group is smaller than or equal to a remained bandwidth of an asynchronous transmission period. If yes, the packet is transmitted in the asynchronous transmission period and the step is repeated to transmit other packets of the longest-length packet group. If not, it is judged whether a length of a packet belonging to a second-longest-length packet group is smaller than or equal to the remained bandwidth of the asynchronous transmission period to transmit the packets of the second-longest-length packet group. These steps are repeated until a shortest-length packet group is greater than the remained bandwidth.

In an embodiment, an arbiter may implement a deficit-weighted round-robin scheme having a delayed weight-reload mechanism. The delay may be greater than or equal to a ratio of the fabric clock to a slower clock associated with one or more sources that have no transactions but that have unconsumed weights (or another measure of difference in transaction rate). If a transaction is provided from the one or more sources during the delay, the reload of the weights may be prevented. In some embodiments, the arbiter may be augmented to improve usage of the bandwidth on an interface in which some transactions may be limited for a period of time. The arbiter may implement a first pointer that performs round robin arbitration. If the first pointer is indicating a source whose transaction is temporarily blocked, a second pointer may search forward from the current position of the main pointer to locate a non-blocked transaction.

The invention relates to a sensing data extraction method. The sensing data extraction method comprises the steps of acquiring current positioning, and loading map data within a setting range of the current positioning; matching a lane where a vehicle is located according to a positioning result, and generating a third-order curve equation of a lane line of the map data; processing sensing data ofa visual sensor on the lane line in front of a vehicle body, and generating a third-order curve equation of the lane line of the sensing data; and performing curve similarity matching on the third-order curve equations of the lane lines of the map data and the sensing data, and extracting and uploading the sensing data of which similarity is lower than a set threshold. By the method, the data quantity transmitted to a cloud is greatly reduced, the data transmission broadband application rate and the transmission speed are greatly improved, the memory occupied by cloud processing data quantityis smaller, so that the fabrication efficiency is improved.

The invention discloses a method for realizing data processing and interaction, which is applied to a client. The method comprises the following steps: taking a request command out of a new request command linked list and inserting into a positive processing command linked list by a command processing thread, splitting the request command, and inserting data packets formed by splitting into a sending packet linked list; taking the data packets out of the sending packet listed list for sending by sending threads; inserting the data packets into a receiving packet linked list by receiving threads if the receiving threads receive the data packets from a service; judging whether the data packets in the receiving packet linked list can assemble into a complete response command or not by a data packet processing thread, and if so, taking out the data packets for assembly, inserting the response command after the completion of assembly into a response command linked list and deleting the corresponding request command in the positive processing command linked list according to the response command, wherein the sending threads and the receiving threads are multiple, and all the threads can perform parallel execution. According to the method disclosed by the invention, the bandwidth utilization rate of physical connection can be improved, and the number of logical connections can be further optimized.