42results about How to "Implement retransmission" patented technology

Provided are a channel transmission method and device, a network side device and a terminal, the method comprising: sending a PDCCH to a first terminal, the CRC of the DCI of the PDCCH being scrambledby a first RNTI of the first terminal, and the initialization value of a scrambling sequence generator of a PDSCH scheduled by the PDCCH being determined by a second RNTI or a third parameter; wherein the second RNTI or the third parameter is different from the first RNTI, and the second RNTI or the third parameter is a shared parameter of the first terminal and at least one other terminal; according to the embodiment of the invention, different terminals independently detect respective PDCCHs, and different PDCCHs schedule the same PDSCH resource, so that each terminal can use the PUCCH resource indicated by the respective PDCCH to feed back while the plurality of terminals detect the same physical resource together.

A method for monitoring, sending paging, and paging a terminal, a base station, and a terminal; the method for monitoring paging includes: the terminal generates first paging monitoring identification information; the terminal generates the first paging monitoring identification information according to the first paging monitoring identification information Determine the paging superframe that the terminal needs to monitor, and monitor paging on the paging superframe.

The present invention provides a channel transmission method, device, network side equipment and terminal, the method comprising: sending a PDCCH to a first terminal, the CRC of the DCI of the PDCCH is scrambled by the first RNTI of the first terminal, the The initialization value of the scrambling sequence generator of the PDSCH scheduled by PDCCH is determined by the second RNTI or the third parameter; wherein, the second RNTI or the third parameter is different from the first RNTI, and the second RNTI or the The third parameter is the shared parameter of the first terminal and at least one other terminal; in the embodiment of the present invention, different terminals independently detect their own PDCCHs, and different PDCCHs schedule the same PDSCH resources, so that multiple terminals can jointly While detecting the same physical resource, each terminal can also use the PUCCH resource indicated by its own PDCCH to perform feedback.

The invention discloses upstream and downstream data retransmitting methods and systems, and in the downstream data retransmitting method, a mapping relationship between an upstream physical frame and a downstream physical frame group is preliminarily configured; wherein, each downstream physical frame group comprises three adjacent downstream physical frames, and each downstream transmission block is equally divided into three downstream physical frame groups; a base station sends one or more data sub-packages to one or more terminals by using the downstream physical frame group of the downstream transmission blocks; the terminal demodulates the received data sub-packages of the downstream physical frame group; according to the demodulating result and the mapping relationship, the terminal sends a response message that represents whether the data sub-package demodulation succeeds by using the corresponding upstream physical frame of upstream transmission blocks after the downstream transmission blocks; the base station demodulates the response message and judges whether the data sub-package demodulation succeeds according to the response message, and for the downstream physical frame group with failed data sub-package demodulation, the base station sends a retransmitting data sub-package of the data sub-package with failed demodulation in the next corresponding downstream physical frame group of the downstream transmission blocks.

The application discloses a data transmission method of a reader-writer, a data receiver and a storage medium. The method includes: the receiving end receives a data packet from the sending end, wherein the data packet contains a first specific timing; the receiving end judges whether the previous data packet of the data packet is received according to the first specific timing; if the previous data packet is not received , then the receiving end will store the first specific time sequence in the retransmission buffer; scan the retransmission buffer regularly, and when it is determined that the retransmission buffer contains a specific time sequence whose storage duration is greater than or equal to the timeout duration, send Send a retransmission command, and the retransmission command includes a specific sequence whose storage duration is greater than or equal to the timeout duration. Using this method does not require the sender to send a confirmation message every time a data packet is sent, which can greatly reduce data interaction, save bandwidth, and is not prone to lag when the amount of data is large. At the same time, the retransmission of lost packet data can also be realized.

The invention discloses a control method for a hybrid automatic repeat request. The method comprises the step of transmitting information of NACK (Negative Acknowledgments) and UL Grant (Uplink Grant) when a base station receives wrong uplink decoded data from an RS (relay station). The UL Grant information comprises control indication information for indicating the base station as a subframe of a repeat resource that the RS allocates. The invention also discloses a control system and a transmitting end device for a hybrid automatic repeat request. A setting unit is used for setting the control indication information which is used for indicating the base station as the subframe of the repeat resource that the RS allocates in the UL Grant information. The invention also comprises a receiving end device for a hybrid automatic repeat request, and the RS realizes transmission of uplink data according to the indication of the control indication information. The employment of the control method, the control system, the transmitting end device and the receiving end device all for a hybrid automatic repeat request can control an uplink asynchronous hybrid automatic repeat request of a relay link.

The embodiment of the invention provides a data packet transmission method, a sending end device and receiving end devices. The method comprises the following steps: after sending first batch of raw data packet to each receiving end device, receiving data packet loss information reported by each receiving end device; according to a lost packet set of each receiving end device, determining a total lost data packet set of all the receiving end devices; according to the total lost data packet set, determining the number of times for retransmitting a coded data packet; according to the number of times and the number of sent raw data packet, improving Vandermonde matrix to encode the coded data packet and determining the coded data packet retransmitted each time; and based on the determined coded data packet retransmitted each time, retransmitting corresponding coded data packet to each receiving end device when transmitting each time. By adopting the data packet transmission method, the sending end device and the receiving end device provided in the embodiment, the lost data packet can be retransmitted efficiently; and the timeliness and the reliability of the data transmission of a multicast communication system can be improved.

The invention discloses upstream and downstream data retransmitting methods and systems, and in the downstream data retransmitting method, a mapping relationship between an upstream physical frame and a downstream physical frame group is preliminarily configured; wherein, each downstream physical frame group comprises two adjacent downstream physical frames, and each downstream transmission blockis equally divided into four downstream physical frame groups; a base station sends one or more data sub-packages to one or more terminals by using the downstream physical frame group of the downstream transmission blocks; the terminal demodulates the received data sub-packages of the downstream physical frame group; according to the demodulating result and the mapping relationship, the terminal sends a response message that represents whether the data sub-package demodulation succeeds by using the corresponding upstream physical frame of upstream transmission blocks after the downstream transmission blocks; the base station demodulates the response message and judges whether the data sub-package demodulation succeeds according to the response message, and for the downstream physical frame group with failed data sub-package demodulation, the base station sends a retransmitting data sub-package of the data sub-package with failed demodulation in the next corresponding downstream physical frame group of the downstream transmission blocks.

The invention discloses a data transmission method and system based on an OFDMA mode. The method includes: sequentially transmitting data packets to be retransmitted corresponding to I frames, P frames, and B frames, so as to realize the retransmission of data packets that have not been successfully transmitted. Transmission, the importance of I-frame data packets, P-frame data packets, and B-frame data packets decreases successively, and their priorities also decrease successively. The present invention transmits important data types (I-frame data) first by transmitting according to the importance of data types. packet), and then transmit the less important data types in turn, which improves the data transmission quality of the network system, and at the same time classifies and allocates and transmits data resources, which also improves the data transmission efficiency of the system.

The present invention discloses a data transmission method and an apparatus thereof. The method includes: obtaining the importance indication information of the subsequent data packet of a current data packet, wherein the importance indication information is used for indicating the importance of the subsequent data packet; obtaining the Hybrid Automatic Repeat Request (HARQ) maximum retransmission times of the subsequent data packet corresponding to the importance indication information; executing physical-layer retransmission for the subsequent data packet according to the HARQ maximum retransmission times. With the embodiments of the present invention, the retransmission delay can be reduced.