How to Retransmission?

Method for transmitting and storing downlink data, base station and terminal,Forward error correction and ran retransmission,Uplink non-orthogonal multiple access transmission feedback method, device and system

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3 results about "Retransmission" patented technology

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Retransmission, essentially identical with Automatic repeat request (ARQ), is the resending of packets which have been either damaged or lost. Retransmission is one of the basic mechanisms used by protocols operating over a packet switched computer network to provide reliable communication (such as that provided by a reliable byte stream, for example TCP).

Method for transmitting and storing downlink data, base station and terminal

ActiveCN105337684AReliable decodingImprove accuracyError preventionNetwork data managementCoding blockReal-time computing

The invention relates to the technical field of communication, and discloses a method for transmitting and storing downlink data, a base station and a terminal. In the scheme, when the base station transmits the downlink data at each time, a bit selection manner adopted by the base station enables that the length and the start point of a sequence expected to receive in initial transmission (or repeat transmission) of the same code block by a terminal in any type are same to the length and the start point of a sequence to be sent by the same code block determined by a sending end, such that the terminal decodes reliably; if decoding is failed, the start point of the sequence in the initial transmission (or repeat transmission) of the same code block stored by the terminal at each time is the same to the start point of the sequence to be sent in the initial transmission (or repeat transmission) of the same code block determined by the sending end; the disadvantage that decoding cannot be carried out accurately due to the fact that storage cannot be carried out accurately when the terminal stores a retransmission code block of the same code block at each time can be avoided; and thus, the decoding accuracy of the terminal is increased.

Owner:HUAWEI TECH CO LTD

Forward error correction and ran retransmission

PendingUS20220311539A1Error prevention/detection by using return channelAdaptation strategy characterisationData packTelecommunications

For a source stream of input data where FEC scheme(s) have been used to create a repair stream, transmitting by a network node packet(s) comprising data of the source stream or the repair stream packaged as at least part of PDU(s). An ARQ or HARQ process is applied to the PDU(s). The network node receives feedback information as part of the process corresponding to the PDU(s), including positive ACK / NACK response for the PDUs. The retransmissions of the negatively acknowledged PDU(s) are controlled when the FEC scheme is known not to be able to compensate for loss(e)s of packet(s) contained in the PDU(s) indicated as being negatively acknowledged. A UE receives packet(s), determines loss(es), and, in response to a determination the FEC scheme is known to be able to recover from the loss(es), sends at least one ACK for any lost packets that correspond to the one or more loss(es).

Owner:NOKIA TECH OY

Uplink non-orthogonal multiple access transmission feedback method, device and system

ActiveCN111211880AReduce overheadImprove transmission efficiencyError prevention/detection by using return channelSignal allocationControl signalEngineering

The invention provides an uplink non-orthogonal multiple access transmission feedback method, device and system. A base station feeds back group-based common control signaling to UE according to a detection result, and respectively feeds back special control signaling of the UE to the UEs with the same detection result and few UEs in the group, so that the UE carries out new transmission or retransmission according to a feedback result indicated by the special control signaling when the UE detects the special control signaling for the UE and the feedback result exists, otherwise, new transmission or retransmission is performed according to the detected feedback result based on the common control signaling indication of the group where the UE is located, wherein the detection result for onegroup in the common control signaling is the detection result corresponding to the UEs with the same detection result and a large number of UEs in the group and the detection result in the special control signaling is the detection result of the corresponding UE. According to the method, the system transmission efficiency can be improved on the basis of saving the signaling overhead.

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Owner:CHINA ACADEMY OF INFORMATION & COMM

3 results about "Retransmission" patented technology

Method for transmitting and storing downlink data, base station and terminal

Forward error correction and ran retransmission

Uplink non-orthogonal multiple access transmission feedback method, device and system

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