17 results about "Incremental redundancy" patented technology

The invention discloses a multi-level coding modulation transmitting method suitable for a hybrid automatic repeat request system, which belongs to the wireless communication technology and comprises the following steps of: performing high-code-rate channel coding on a first information bit sequence of a transmitting end to obtain a first coding bit sequence, and performing low-bit-rate coding on the second information bit sequence to obtain a second coded bit sequence. In the first transmission, the first coded bit sequence and the second coded bit sequence are combined and pass through an interleaver to obtain a first transmission bit sequence, and the first transmission bit sequence is modulated to obtain a first transmission modulation symbol sequence; and if the first transmission fails, performing channel coding with a lower code rate on the second group of information bit sequences to obtain a first retransmission bit sequence, and modulating the first retransmission bit sequence to obtain a first retransmission modulation symbol sequence. Compared with a BICM scheme with the same spectrum efficiency, the transmitting method provided by the invention has the advantages that the demodulation and error correction code decoding complexity is greatly reduced, and meanwhile, the performance similar to that of an incremental redundancy HARQ is obtained.

The present application provides a method and communication device for rate matching of a convolutional code, wherein a puncture pattern of a second codeword at a second code rate is obtained based on a puncture pattern of a first codeword at a first code rate, wherein a second puncture position set of the second codeword is a subset of the first puncture position set of the first codeword. When a transmitting end device reduces the code rate from the first code rate to the second code rate, redundant bits are transmitted at positions in the second puncture position set that are the complement of the first puncture position set. Compared to the first puncture position set, the second puncture position set can obtain more incremental redundant bits, thereby reducing the channel coding rate and improving the decoding performance of the convolutional code.

Reduced numbers of encoded bits obtained by encoding input bits by a polar code are incrementally output, for transmission for example. The polar code comprises bit indices for placing bit values before encoding. The bit indices include a first set of bit indices for placing values of the input bits and a second set of bit indices for placing a predetermined bit value. A first reduced number of the encoded bits start from a first starting position, and a second reduced number of the encoded bits start from a second starting position different from the first starting position. The second reduced number of the encoded bits include one or more of the encoded bits not included in the first reduced number of the encoded bits. The reduced numbers of encoded bits may be output from continuous positions, in a circular buffer for example, or may include repeated bits.

The reduced number of encoded bits obtained by encoding the input bits by the polar code is incrementally output, for example for transmission. The polar code includes a bit index for placing bit values prior to encoding. The bit indices include a first set of bit indices for placing values of the input bits; a second set of bit indices for placing predetermined bit values. A first reduced number of the coded bits begins from a first starting position and a second reduced number of the coded bits begins from a second starting position different from the first starting position. The second reduced number of coded bits includes one or more of the coded bits not included in the first reduced number of coded bits. For example, the reduced number of encoded bits may be output from consecutive locations in a circular buffer, or may include duplicated bits.

The application provides a time-sensitive network resource allocation method based on truncated retransmission technology, and belongs to the field of wireless communication.In the method, an end-to-end time-sensitive network transmission model is first constructed;secondly, the end-to-end time delay of the time-sensitive network is calculated according to an incremental redundancy-hybrid automatic repeat request (IR-HARQ) finite code length formula;finally, a code length and transmission power joint optimization problem with the minimum end-to-end time delay as the target is established, and a convex optimization method is used for efficient solution.The time-sensitive network resource optimization method based on the truncated retransmission technology can greatly guarantee the high reliability and low time delay requirement of the time-sensitive network.

Methods, systems, and devices for wireless communications are described. An example method includes receiving a first transmission of one or more code blocks in a first slot and transmitting uplink control information that includes acknowledgement information for the one or more code blocks. The method also includes receiving a scheduling signal that indicates one or more parameters associated with a re-transmission scheduling policy based at least in part on the acknowledgement information. The method also includes receiving a second transmission of at least a portion of the one or more code blocks in a second slot and decoding the second transmission of at least the portion of the one or more code blocks according to the re-transmission scheduling policy.

Methods, systems, and devices for wireless communications are described. A wireless communications system may support transmission of feedback information for downlink data information in multiple feedback payloads across multiple uplink channel slots. For a downlink channel carrying first data information, a user equipment (UE) may transmit feedback information for the data information in two or more uplink channel transmission occasions. A first payload transmitted during a first uplink channel occasion and a second payload transmitted during a second uplink channel occasion may have overlapping information, such as feedback information for the first data information, but may not be identical. The first payload may include feedback information for a first set of downlink channel transmissions, and the second payload may include feedback information for the first set of downlink channel transmissions and a second set of downlink channel transmissions.

Reduced numbers of encoded bits obtained by encoding input bits by a polar code are incrementally output, for transmission for example. The polar code comprises bit indices for placing bit values before encoding. The bit indices include a first set of bit indices for placing values of the input bits and a second set of bit indices for placing a predetermined bit value. A first reduced number of the encoded bits start from a first starting position, and a second reduced number of the encoded bits start from a second starting position different from the first starting position. The second reduced number of the encoded bits include one or more of the encoded bits not included in the first reduced number of the encoded bits. The reduced numbers of encoded bits may be output from continuous positions, in a circular buffer for example, or may include repeated bits.

Methods, systems, and devices for wireless communications are described. A wireless communications system may support transmission of feedback information for downlink data information in multiple feedback payloads across multiple uplink channel slots. For a downlink channel carrying first data information, a user equipment (UE) may transmit feedback information for the data information in two or more uplink channel transmission occasions. A first payload transmitted during a first uplink channel occasion and a second payload transmitted during a second uplink channel occasion may have overlapping information, such as feedback information for the first data information, but may not be identical. The first payload may include feedback information for a first set of downlink channel transmissions, and the second payload may include feedback information for the first set of downlink channel transmissions and a second set of downlink channel transmissions.

A user equipment (UE) may transmit, to a network node, an indication of support for a decoder success prediction capability. The network node may obtain the indication of support by the UE for the decoder success prediction probability. The network node may output a transmission for the UE including one or more parameters based on the indication of support by the UE for the decoder success prediction capability. The UE may receive the transmission including one or more code blocks based on the indication of support for the decoder success prediction capability. The network node may optimize a multiple incremental redundancy scheme (MIRS) schedule for at least one of transmitting the transmission or retransmitting the transmission based on the indication of support by the UE for the decoder success prediction capability. The transmission may include the MIRS schedule.

Methods, systems, and devices for wireless communication are described. Multiple incremental redundancy scheme (MIRS) may be an SPEF adaptation scheme for finding an optimal spectral efficiency (SPEF) for transmission of transport blocks. The network may transmit a scheduling and signaling framework to allow multiple transport blocks to be scheduled in a single downlink resource allocation for transmission with the MIRS. For example, a network may schedule a single resource allocation for transmission of multiple transport blocks from the network to a UE. The plurality of transport blocks may include at least an initial transmission of a new transport block and / or a retransmission of any transport block from a previously allocated receiver that cannot be successfully decoded.

The invention provides a retransmission method of a multi-level coded modulation system and the multi-level coded modulation system, and belongs to the technical field of communication. In the retransmission method of the multi-level coded modulation system, a sending end obtains a first retransmission signal NACK from a receiving end, and based on the first NACK, N transmission layers of a to-be-transmitted bit stream are respectively retransmitted for J times by adopting an incremental redundancy mode, so that the receiving end combines a first bit stream and a second bit stream corresponding to a first target transmission layer, and obtaining a third bit stream corresponding to the first target transmission layer, and demodulating and decoding the third bit stream, the first target transmission layer being any one of the N transmission layers. According to the invention, by increasing the flexibility of retransmission technology application in the multi-level coding modulation system, the gain of the multi-level coding modulation system is improved, and the reliability of data transmission of the multi-level coding modulation system is improved, so that a coding layer without a code rate compatibility characteristic can also adopt an IR mode, and the performance of the multi-level coding modulation system is improved.

Methods, systems, and devices for wireless communication are described. Techniques described herein provide for reporting a capacity gap (G2C metric in a multiple incremental redundancy scheme (MIRS). The receiver may transmit information to the transmitter indicative of thermal noise or interference associated with the G2C metric. The transmitter may transmit a number of coding bits to the receiver based on the G2C metric and noise or interference associated with the G2C metric. In some examples, a transmitter may transmit signaling to a receiver indicating a configuration for reporting a G2C metric, noise data associated with the G2C metric, and interference data.

This disclosure describes a module and method for transmitting codewords in a wireless communication system using an incremental redundancy-hybrid automatic repeat request (IR- HARQ) scheme. Each of the codewords comprise information-bit sequences that have been encoded based on a parity check matrix (PCM) that was derived from a lifted base matrix of a rate-compatible root-protograph low-density parity-check (RC-RP-LDPC) protograph.

The application discloses a multi-stage coding modulation transmitting method suitable for a hybrid automatic repeat request system and belongs to wireless communication technology. The method comprises the following steps: performing high-rate channel coding on a first information bit sequence of a transmitting end to obtain a first coded bit sequence, and performing low-rate channel coding on a second information bit sequence to obtain a second coded bit sequence. In a first transmission, the first coded bit sequence and the second coded bit sequence are combined and passed through an interleaver to obtain a first transmission bit sequence, and modulation is performed on the first transmission sequence to obtain a first transmission modulation symbol sequence; if the first transmission fails, a second group of information bit sequences are subjected to lower-rate channel coding to obtain a first retransmission bit sequence, and modulation is performed on the first retransmission bit sequence to obtain a first retransmission modulation symbol sequence. The transmitting method of the application greatly reduces the demodulation and error correction code decoding complexity compared with a BICM scheme with the same spectral efficiency, and obtains a performance close to that of incremental redundancy HARQ.

The invention relates to the technical field of data transmission, in particular to a single-carrier frequency domain balanced transmission system for remote unmanned aerial vehicle image transmission, which comprises a transmitting end module, a receiving end module and an auxiliary module, compared with the defects that in the prior art, a fixed coding mode is mostly adopted in the aspect of error correction coding and is difficult to adapt to a dynamically changing channel environment, so that the anti-interference capability is insufficient, the transmission efficiency is low and the like under a complex channel condition, the technical scheme that the Polar code and the LDPC code are selected according to the channel state to carry out error correction coding is adopted, and the error correction coding efficiency is improved. Dynamically selecting a coding scheme based on a preset SNR threshold value and a machine learning model; the code rate of the Polar code is adjusted according to SNR, a reliable bit position table is preloaded, and CRC is combined to assist SCL decoding; the QC-LDPC code is used for the LDPC code, layered decoding reduces delay, incremental redundancy retransmission is triggered in a severe channel, different channel environments can be flexibly adapted, the coding strategy is dynamically adjusted, the transmission efficiency and reliability are improved, and meanwhile the low power consumption requirement is considered.

Methods, systems, and devices for wireless communications are described. Techniques described herein provide reporting a gap to capacity (G2C) metric in a multiple incremental redundancy scheme (MIRS). A receiver may transmit, to a transmitter, information indicative of thermal noise or interference associated with the G2C metric. The transmitter may transmit, to the receiver, a quantity of coded bits based on the G2C metric and the noise or the interference associated with the G2C metric. In some examples, the transmitter may transmit to the receiver signaling indicating a configuration for reporting the G2C metric, the noise data and the interference data associated with the G2C metric.