75 results about "NAK" patented technology

In a method for transmitting radio link protocol frames in a mobile radio communication system, if an error occurs on a radio section when user data frames of a radio link protocol (RLP) having respective different series numbers are transferred from a transmitting station to a receiving station, at least one missed user data frame is caused at the receiving station. At this time, the receiving station transmits, repeatedly by first times, a negative acknowledgement (NAK) control frame of the RLP for at least one missed user data frame, to the transmitting station. The transmitting station sends, by second times different from the first times, at least one missed user data frame in response to the received NAK control frame, to the receiving station. Particularly, series numbers of respective missed user data frames are sent through one NAK control frame to the transmitting station, at equal time when a timer for an NAK is expired, to accordingly result in reducing the number of the total NAK control frames and increasing a throughput per unit time.

The invention discloses methods and devices for allocating uplink control resources and transmitting uplink control information. The method for transmitting uplink control information comprises that: a terminal acquires the shift interval of a cyclic shift sequence, the resource number for feeding an acknowledgment (ACK)/a negative acknowledgment (NACK) back and an ACK/NACK feedback mode; according to the shift interval of the cyclic shift sequence and the resource number for feeding ACK/NACK back, the terminal determines an available spread spectrum sequence for feeding the ACK/NACK back, wherein the spread spectrum sequence comprises a cyclic shift sequence and an orthogonal sequence; and after receiving downlink data, the terminal transmits the ACK/NACK information to be fed back in the ACK/NACK feedback mode in an uplink control channel by using the available spread spectrum sequence. Thus, the transmission of many pieces of ACK/NACK information in one uplink control channel is realized in a system for realizing long-term evolution multi-carrier aggregation.

The invention discloses a hybrid automatic retransmission request communication method, a device and a communication system. The method comprises the following steps: receiving a first hybrid automatic retransmission request (HARQ) message; selecting a member carrier having the minimum time delay according to the time delay between the first HARQ message and a second HARQ message of N member carriers which can be used for transmitting the second HARQ message in a carrier aggregation, wherein N is an integral number greater than 1, the first HARQ message is current data and the second HARQ message is an acknowledgement/negative acknowledgement message (ACK/NACK message), or the first HARQ message is the ACK/NACK message and the second HARQ message is previous data corresponding to the ACK/NACK message or next data of the previous data; and transmitting the second HARQ message by means of the member carrier having the minimum time delay. The embodiment of the invention can reduce HARQ RTT, thereby meeting the requirements of real-time services.

The invention provides a feedback information transmission method and device. The feedback information transmission method comprises the steps that terminal equipment receives indication information from network equipment, wherein the indication information indicates the generation of a semi-static codebook; the terminal equipment detects a first PDSCH (Physical Downlink Shared Channel) at M candidate receiving positions in a first time unit, wherein the first PDSCH is a semi-persistent scheduling SPDSCH or a scheduling-free PDSCH, and M is a positive integer; and the terminal equipment determines whether to send first feedback information to the network equipment according to the detection result of the first PDSCH, wherein the first feedback information comprises acknowledgement (ACK) ornegative acknowledgement (NACK) information about whether the detected first PDSCH is correctly decoded at the M candidate receiving positions. According to the feedback information transmission method provided by the invention, the overhead of the semi-static codebook can be reduced, and the waste of resources is reduced. The feedback reliability is improved, and the communication efficiency isimproved.

Provided is a method and arrangement in a terminal for receiving data packets from a base station and providing feedback to the base station. The feedback concerns the reception status of the received data packets and may comprise an ACK/NAK. The method comprises receiving and decoding data packets from the base station in a subframe. It is further established whether any data packet within the received subframe is not correctly received and detected whether any subframe, expected to be received, has been missed. Further, acknowledgement information ACK/NAK is generated, a scrambling code selected with which the ACK/NAK is scrambled. The scrambled ACK/NAK is then sent to the base station, concerning the reception status of the data packets within the received subframes.

The invention discloses a hybrid automatic retransmission method, apparatus and system in an FDD-LTE network. The hybrid automatic retransmission method comprises: configuring a transmission time interval k, the transmission time interval k being a time interval between the time when a base station receives PUSCH information sent by a user terminal and the time when the base station sends PHICH information to the user terminal; sending indication information to the user terminal at an i-th download subframe, the indication information comprising the transmission time interval k; receiving the PUSCH information sent by the user terminal on an (i+4)-th uplink subframe; sending the PHICH information to the user terminal on an (i+4+k)-th downlink subframe; and if the PHICH information comprises a negative acknowledgement message, receiving the PUSCH information retransmitted by the user terminal on an (i+4+k+4)-th uplink subframe, such that the time for sending the PHICH information can be flexibly scheduled and deposed, and LTE can more flexibly support the application scenes of a multilayer/multi-cell large scale antenna combined processing technology.

A method for discarding perpetually-rejected packets in a fabric-based interconnect having a reliable physical layer is disclosed. A transmitting component keeps a count of the number of negative acknowledgements (NAKs) it receives from the receiving component for packets the transmitting component sends. If the transmitting component receives a number of consecutive NAKs for the same packet that exceeds some pre-determined threshold, the packet is not resent, but is, instead, treated as having been acknowledged, and subsequent packets are allowed to be transmitted. Higher-level processes are then notified of the problem so as to allow the error to be dealt with at a higher level, but without obstructing the flow of packets on the physical layer.

The invention discloses an ARQ feedback based resource allocation method for a relay cooperative underwater acoustic communication system. Under the circumstance that the target packet error rate and the status information of an unknown channel at the end of a source node are given, feedback information ACK and NAK (acknowledge/negative acknowledge) of a target terminal are utilized and the situations of relatively complicated underwater environment, relatively severe noise interference and anterior noise amplification by a relay are drawn into consideration to realize dispatching and rate allocation of target users. Simulation results show that compared with a traditional scheme, the scheme provided by the invention can be utilized to obtain relatively low bit error rate (approximate to the performance when the channel status is known) under the condition of relatively low complexity.

A PCI-Express data link transmitter includes a plurality of arbiters, each employing a distinct priority rule to select one of multiple scheduled TLPs and DLLPs based on their distinct types. A selector selects one of the arbiters to select the one of the multiple scheduled TLPs and DLLPs for transmission. A programmable storage element provides a value to control the selector. In one embodiment, the distinct priority rule employed by at least a first of the arbiters prioritizes TLPs higher than Ack/Nak DLLPs, and the distinct priority rule employed by at least a second of the arbiters prioritizes Ack/Nak DLLPs higher than TLPs. In one embodiment, at least a first arbiter prioritizes TLPs higher than Ack/Nak DLLPs and UpdateFC DLLPs, at least a second arbiter prioritizes Ack/Nak DLLPs higher than TLPs and UpdateFC DLLPs, and at least a third arbiter prioritizes UpdateFC DLLPs higher than TLPs and Ack/Nak DLLPs.

The invention relates to the technical field of wireless communication, and particularly relates to a data transmission method, a device and a system. The invention provides the data transmission method, user equipment UE receive data from a first access network device to which a service cell belongs; the UE send a decoding result of the data to the first access network device, and a second accessnetwork device to which a collaborative cell belongs; if the decoding result is a negative acknowledgement signaling NACK, the UE receive the data retransmitted from the first access network device,and receive the data from the second access network device. The data transmission method, the device and the system provided by the invention aim at helping the first access network device to transmitor retransmit the data to the UE through the second access network device so as to improve reliability of data transmission under a low-delay scene.

Various aspects of the disclosure relate to retransmission techniques for communication of information (e.g., for wireless communication). In some aspects, if a device's first transmission including punctured encoded data fails, the device's second transmission (e.g., in response to a NAK) may involve transmitting the punctured bits. In some aspects, the coding rate used for encoding the data for the first transmission is selected to meet an error rate (e.g., a block error rate) for the second transmission. The second transmission may also include at least some of the encoded data. In some aspects, the puncturing may be performed according to a puncture pattern that is generated based on bit error probabilities of bit positions for encoded data.

The invention belongs to the technical field of communication and particularly relates to a resource scheduling method for cross-layer orthogonal frequency division multiple access (OFDMA) by adopting high-layer feedback information. The dependent information includes acknowledgement/negative acknowledge (ACK/NAK) information fed back by a scheduling user at a last time period and full spectrum band signal to noise ratio information periodically fed back by all users. A scheduling problem can be abstracted as a partial Markov decision process problem. The invention provides a similar algorithm, wherein a posteriori distribution of a channel is updated by channel collateral information provided by the ACK/NAK information, and meanwhile, the complexity of the algorithm is reduced by particle filter; and for acquiring more multi-user gains, an error caused by posteriori distribution prediction merely relying on the ACK/NAK information by adopting signal noise ratio (SNR) information which is fed back in the invention is corrected. According to the method provided by the invention, the system performance can be effectively improved, and particularly the performances of the multi-user gains can be effectively improved.

A method of data transmission between a base station and a user equipment. The method comprises, for the base station: receiving, at the base station, data to be transmitted to the user equipment; transmitting the data to the user equipment; receiving a signal indicative of early prediction feedback from the user equipment. Based on the signal indicative of early prediction feedback, if the signalindicative of early prediction indicates DTX, retransmitting the data to the user equipment repeating the method from the step of receiving a signal indicative of early prediction feedback. If the signal indicative of early prediction indicates NAK, determining, whether a sufficient latency budget is available decided. If the budget is available, continuing the method at the step of receiving anHARQ feedback. If the budget is not available, retransmitting the data to the user equipment and repeating the method from the step of receiving a signal indicative of early prediction feedback. The method further comprises receiving an HARQ feedback and, if the HARQ feedback indicates NAK, retransmitting the data to the user equipment and repeating the method from the step of receiving a signal indicative of early prediction feedback. The method comprises, for the user equipment: receiving data from the base station; estimating an error probability based on at least a portion of the receiveddata; generating a signal indicative of early feedback based on the estimated error probability; and sending the signal indicative of early prediction feedback to the base station. A base station anda user equipment configured to perform the respective methods are also disclosed.

Systems and methods for reducing latency on long distance point-to-point links where the point-to-point link is a Peripheral Component Interconnect (PCI) express (PCIE) link that modifies a receiver to advertise infinite or unlimited credits. A transmitter sends packets to the receiver. If the receiver's buffers fill, the receiver, contrary to PCIE doctrine, drops the packet and returns a negative acknowledgement (NAK) packet to the transmitter. The transmitter, on receipt of the NAK packet, resends packets beginning with the one for which the NAK packet was sent. By the time these resent packets arrive, the receiver will have had time to manage the packets in the buffers and be ready to receive the resent packets.

The embodiment of the invention discloses a data transmission method, which is used for preventing a PUCCH from expanding a time domain symbol so as to improve the uplink throughput rate of a PUSCH. The method provided by the embodiment of the invention comprises the following steps: in a scheduling period, after a base station schedules terminal equipment to be scheduled, the base station acquires a wave beam and wave beam geographic position information of the terminal equipment to be scheduled and receives reference signal power; the base station generates a special-shaped wave beam according to the wave beam geographic position information and the received reference signal power; and finally, the base station receives an uplink acknowledgement/negative acknowledgement (ACK/NACK) fed back by the to-be-scheduled terminal equipment by using the special-shaped beam.

Disclosed herein is a power level at which a base station (BS) (110) in a wireless network (100) establishes a message for transmitting a message acknowledging receipt of packet data from a mobile communication device (MCD) (114). In one embodiment, the BS deduces whether the MCD received the given acknowledgment message by considering whether the next communication data from the MCD includes new packet data (306, 316), and whether it includes retransmitted data (310, 320). . The BS adjusts (312, 314, 322, 324) the transmit power level for future acknowledgment messages based on whether the MCD received past acknowledgment messages. In a different embodiment, the actual/estimated transmit power from the serving base station to a given MCD is averaged (404) and increased (406) by a specified amount to produce a target level. Whenever the non-serving base station transmits a message acknowledging receipt of packet data from the MCD, the non-serving base station transmits at the target level (408).