36results about How to "Improve data transfer throughput" patented technology

A data transport system for transporting data between a server (21) and a client receiver (27) over a network (23) includes a receiving proxy cache (25) coupled to a client receiver (27) via a reliable connection (29), such as a cable connection. The majority of data is transported from the server (21) to the receiving proxy cache (25) over an efficient data transmission channel (41). The receiving proxy cache (25) verifies the status of the data transmitted over the efficient channel (41). If there is an error in the data transmission, a portion of the data associated with the error is retransmitted from the server (21) to the receiving proxy cache (25) over a reliable data transmission channel (43). The complete data at the receiving proxy cache (25) is delivered to a client receiver (27) over a reliable connection (29).

A data transfer control device 1061 includes a read pointer update unit 5004 updating a value of a global read pointer RPg with a value of a local read pointer (first local read pointer) RP11 held by a local read pointer hold unit 5007 when completion of data transfer is recognized and a position, in an order of reading descriptors, of a descriptor D3010a indicated by the local read pointer RP11 is earlier than positions of descriptors D3010b and D3010c respectively indicated by local read pointers (second local read pointers) RP12 and RP13 held by the other data transfer control devices 1062 and 1063.

A radio apparatus is disclosed for improving the throughput of data transfer using a HARQ-based automatic retransmission. The radio apparatus performs a HARQ-based automatic retransmission. In this event, a redundancy version control unit identifies a redundancy version in the retransmission based on a redundancy version in the preceding transmission in which the need for retransmission arose. A HARQ processing unit performs rate matching on each of the systematic bits and parity bits of data to be retransmitted in accordance with the redundancy version identified by the redundancy version control unit.

A mobile communication system is disclosed which comprises: an information terminal unit; a plurality of mobile stations, each of which communicates with the information terminal unit; a packet mobile switching center which communicates with the plurality of mobile stations through a radio access network; a packet mobile gateway switching center which communicates with the packet mobile switching center through a mobile data network; and a content server which communicates with the packet mobile gateway switching center through the Internet; wherein the information terminal unit downloads or uploads data from or to the content server through the plurality of mobile stations.

A data transfer control device 1061 includes a read pointer update unit 5004 updating a value of a global read pointer RPg with a value of a local read pointer (first local read pointer) RPl1 held by a local read pointer hold unit 5007 when completion of data transfer is recognized and a position, in an order of reading descriptors, of a descriptor D3010a indicated by the local read pointer RPl1 is earlier than positions of descriptors D3010b and D3010c respectively indicated by local read pointers (second local read pointers) RPl2 and RPl3 held by the other data transfer control devices 1062 and 1063.

A system and method for robust data loss recovery in a wireless local area network is provided. The method includes splitting user data into multiple data fragments. The method further includes creating multiple beacon frames by placing each data fragment in a unique beacon frame and broadcasting the beacon frames through a wireless medium by an access point of the network. Prior to transmission, the method includes arranging the frames into a plurality of groups and creating a parity frame for each group, to be transmitted along with the beacon frame. After transmission, the beacon frames are received by a wireless client and data fragments are extracted from each beacon frame. At the receiving end, the wireless client checks whether all the transmitted beacon frames have been received. Finally, the user data is reconstructed from the extracted data fragments by reassembling the data fragments.

The invention belongs to the field of communication technologies, and in particular relates to an implementation scheme for cooperative spectrum sensing based on cognitive radio technology in a wireless communication system. A sensing information fusion method based on energy detection, after all cognitive nodes complete local spectrum sensing based on energy detection, the fusion center and all cognitive users participating in spectrum sensing use the sensing information fusion method provided by the present invention to realize sensing information Fusion, while improving the accuracy and spatial scope of spectrum sensing results, reduces the time overhead of all cognitive nodes reporting local sensing decision results to the fusion center, and achieves better cooperative sensing performance than traditional cooperative sensing fusion rules.

The invention belongs to the technical field of communication, and in particular relates to an access control protocol design suitable for a multi-channel cognitive wireless network. The present invention aims at various defects existing in the existing cognitive wireless network access control mechanisms based on the perception-reservation mode and the reservation-awareness mode, and designs a new cognitive wireless network based on a dedicated control channel based on the reservation-awareness mode. Network access control mechanism. Compared with the prior art, the access control mechanism proposed in the present invention needs to be able to better avoid interference to the communication of the hidden primary user and more fully utilize the time-frequency resources of the dedicated control channel and other unreserved data channels for identification. know data transmission. At the same time, compared with the prior art, the access control mechanism proposed in the present invention needs to be able to achieve better data channel utilization efficiency and network data transmission throughput.

The invention discloses a multi-carrier communication method and device of a TDD mode MIMO wireless communication system. The wireless communication system has a plurality of channels of base band signals, and each channel of signals include two spatial flow signals; the method includes the steps that frequency conversion is carried out by a transmitter on the multi-channel two-spatial-flow base band signals two times to obtain different-frequency single carrier microwave frequency band signals of the multi-channel two-spatial-flow, then the different-frequency single carrier microwave frequency band signals are merged to form a single channel of cross polarization double-spatial-flow multi-carrier microwave frequency band signals to be transmitted through a single antenna, the single channel of cross polarization double-spatial-flow multi-carrier microwave frequency band signals are separated by a receiver into multiple-channel two-spatial-flow single carrier microwave frequency band signals, and down-conversion is carried out on the multiple-channel two-spatial-flow single carrier microwave frequency band signals two times to obtain the multiple channels of base band signals. The invention further provides the multi-carrier communication device of the TDD mode MIMO wireless communication system in the mode. Compared with the prior art, the multi-carrier communication method and device have the advantages that abundant spectrum resources of millimeter waves can be effectively utilized, and the data transmission handling capacity of the wireless communication system can be improved in a multiplied mode.

The invention discloses a UART (Universal Asynchronous Receiver / Transmitter) data transmission method. The method comprises the following steps: a sending end marks a sending channel as a normal sending channel or an abnormal sending channel; the normal sending channel obtains data from the priority buffer area and the normal buffer area in sequence and writes the data into the sending buffer areaso as to send the data to a receiving end; the receiving end performs integrity judgment on the received data, returns feedback information to the sending end, and processes the received data; judging whether the sent data exceeds the maximum retransmission frequency or not when the sending end judges that the data transmission is not successful; if so, transferring to a priority buffer area, andtransmitting by other normal transmitting channels; if not, directly resending the data; and when the sending end judges that the data transmission is successful, starting the transmission of the next frame of data. According to the invention, multiple UART channels are adopted for data distribution and transmission, mutual pressure reduction is realized, and the pressure of data transmission ofeach channel is averaged, so that the average efficiency of data transmission is effectively improved.