76 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.

A hybrid ARQ technique for transmitting a data unit on a radio channel in a communication system to a receiver is provided, wherein after the encoding the data unit into a sequence of code words using an encoding parameter, a first code word is transmitted, and an ACK or NAK is received from the receiver. If a NAK is received, the next code word of the sequence is transmitted. A measurement value indicating the current channel conditions is determined by counting the NAK messages and / or evaluating the encoding parameters. The measurement values may be the overall coding rate, the average number of retransmissions per data unit, or the average number of retransmissions per code word. The transmitter may include a NAK counter. The measurement may be used for adaptation purposes.

A set of data frames from multiple communication channels is received. Then, at least one idle frame including the sequence number of the last frame in the set of data frames is received. If at least one data frame is missing, a delay time period is allowed after receipt of an idle frame before sending a negative acknowledgment message.

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.

The invention provides a method for scheduling feedback information resources. The method comprises the following steps: after receiving UL SPS (uplink semi-persistent scheduling) information in the current DL CC (downlink component carrier) sent by a base station (BS), a terminal transmits a UL SPS PUSCH (physical uplink shared channel) on a UL Primary CC according to transmission attributes indicated in the UL SPS scheduling information; if the carrier indicator field (CIF) of the current DL CC is available, a DMRS (demodulation reference signal) is determined according to a CS (cyclic shift) value of the DMRS indicated by the information field (INF) of the CIF or a DMRS CS value indicated by a DMRS CS INF; and the terminal monitors a corresponding PHICH (physical hybrid-automatic repeat request (ARQ) indicator channel) thereof on a DL ACK (acknowledgement) / NAK (negative acknowledgment) feedback sub-frame corresponding to the UL SPS PUSCH, and PHICH resources are calculated according to a resource indication INF in the UL SPS information and the corresponding DMRS CS value. The technical scheme provided by the invention has the advantages that a PHICH resource mapping method in the existing LTE (long term evolution) R8 version is not changed, reliability of a UL SPS PDCCH (physical downlink control channel) is not affected, and PHICH resource conflict can be effectively avoided in the case of UL SPS transmission.

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 provides a data packet retransmission method based on network codes. In the retransmission process, a data packet is transmitted through the network codes with the probability of pnc, the data packet is code combination of N lost data packets, and the N lost data packets comprise one lost data packet needing to be retransmitted by a sender and the other N-1 data packets lost by other senders. Considering compatibility, according to an existing IEEE802.11MAC protocol design, the transmission process of PNCRM is similar to IEEE802.11, an RTS-CTS-data packet-ACK or NAK handshake protocol is also used, an ACK frame is transmitted when transmission succeeds, and an NAK frame is transmitted when transmission fails, and retransmission is executed. Compared with the existing network coding technology, the PNCRM can be applied to an MSMR single-hop wireless network without a relay node, and system performance can be effectively improved by selecting the appropriate retransmission probability pnc and the coding degree N.

A method for controlling a turbo decoding time in a high-speed packet data communication system. In a mobile communication system which receives a control message from a packet data control channel, at the same time receives packet data from the packet data channel, performs demodulating and turbo-decoding of the packet data during a predetermined response (ACK / NAK) time delay using a demodulation result of the packet data control channel, creates a result of the turbo decoding in the form of a response (ACK / NAK) signal, and transmits the turbo decoding result, the method includes the steps of a) demodulating the control message when simultaneously receiving the control message and the packet data, and demodulating and decoding the packet data, and b) if the response time delay expires while decoding the packet data, interrupting a decoding operation of the turbo decoder.

The invention relates to the technical field of satellite communication, and discloses a UDP-based reliable data transmission method for a satellite network. The method comprises an ACK timeout retransmission mechanism, an NAK accurate retransmission mechanism and a congestion control mechanism. A data sender receives ACK packets fed back by a receiver every other ACK time period, and if the sender does not receive the ACK packets after a set time interval, the ACK timeout retransmission mechanism is triggered; a receiver detects whether a packet loss event occurs or not when receiving data packets, and transmits an NAK packet with a packet loss serial number to the sender when packet loss detection succeeds, and the sender accurately retransmits the lost data packet according to the NAK packet; the random packet loss and the link congestion packet loss are accurately judged by utilizing the packet loss and round trip time delay change conditions, and the speed reduction processing iscarried out only when the congestion is judged. According to the invention, the problem of low reliable transmission efficiency in a satellite network environment with high time delay, limited bandwidth resources and high bit error rate can be solved.

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.

The invention provides a Portal secondary address authentication method and a Portal secondary address authentication device. The method is applied to network access equipment with a dynamic host configuration protocol (DHCP) relay function, and comprises the following steps that: the network access equipment intercepts a DHCP renewal message transmitted by a client; the network access equipment modifies the DHCP renewal message when the authentication state of a client user indicates that the client user passes authentication to carry a public network gateway address in the DHCP renewal message, and transmits the DHCP renewal message to a DHCP server to trigger the DHCP server to transmit a DHCP negative acknowledgement (NAK) message to the client; and after receiving the DHCP NAK message, the client releases a currently used Internet protocol (IP) address, and reapplies for an IP address.

An embodiment of the invention discloses a dispatch switching control method, a system, a user terminal and a network device. The dispatch switching control method comprises the steps that UE sends upstream service data to the network device through an E-DCH and receives a receiving result message returned by the network device; NACK information responses to the receiving result message, the total number of positive acknowledgements and negative acknowledgements in a quality measurement control message issued by the network device serves as a unit, the UE conducts statistics on the total number of the received positive acknowledgements and negative acknowledgements and determines whether the total amount of NACK information in a window reaches an NACK number threshold value in a quality measurement control message; if the total amount of NACK information reaches the NACK number threshold value, the UE launches a measurement report message of a 5B incident to the network device, so that the network device does not dispatch and authorize the UE on the basis of the TEBS reported by the UE. The embodiment of the dispatch switching control method enables the network device on the side of a network to effectively and reasonably dispatch and authorize the UE.

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.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be configured to communicate with a base station on different channels or messages with different processing timelines. In order to prevent a collision between processing communications associated with the different length TTIs, the UE may drop one or more communications on corresponding channels with longer processing timelines to receive and / or process the transmission on the channel with a shorter processing timeline. Additionally, the UE may transmit uplink control information (UCI) for the one or more dropped communications, where the UCI may include hybrid access request (HARQ) acknowledgement / negative acknowledgement (ACK / NAK) feedback, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), etc. If a downlink transmission is dropped, the UE may transmit a NAK message. Alternatively, if an uplink transmission is dropped, the UE may transmit at least a portion of the UCI.

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.

The present invention relates to a method, communication terminal, a streaming server and a communication system for providing feedback for data packets of a streaming session from a client to a streaming server to enable a target number of retransmissions for each data packet within a client buffering time defining a time interval during which a data packet is stored in a buffer at the client before being processed. The at least one streaming session is provided using a RTP protocol and the RTCP protocol, wherein a fraction of the available bandwidth is allocated to RTCP packets. To specify method how compressible and detailed report blocks may be tailored to different streaming client and server implementations the present invention gradually reduces the data included in a RLE Report Block based on different mechanisms to fulfill the RTCP bandwidth constraint and to enable a target number of retransmissions for each RTP packet.

Bits for acknowledgment (ACK) and / or negative acknowledgment (NAK) may be allocated based on whether the dedicated subframe configuration in the TDD configuration allows downlink transmission. For carrier aggregation, ACK / NAK bits may only be allocated to dedicated subframes in component carriers (CCs) that allow downlink transmission. Also, for example, if a single CC is configured to allow downlink transmission on one of its dedicated subframes, all CCs may be assigned ACK / NAK bits for the dedicated subframes. In addition, ACK / NAK bits may also be allocated to all dedicated subframes.

A base station (BS) (110) in a wireless network (100) establishes power levels for transmitting messages acknowledging receipt of packet data from a mobile communications device (MCD) (114). In one implementation, the BS infers whether the MCD received a given acknowledgement message by considering whether (306, 316) the next communication from the MCD comprises new packet data, and whether (310, 320) that data comprises re-transmitted data. The BS adjusts (312, 314, 322, 324) transmit power level for future acknowledgement messages according to whether the MCD received past acknowledgement messages. In a different implementation, actual / estimated transmit power from a serving base station to a given MCD is averaged (404), and increased (406) by a prescribed amount to yield a target level. Whenever the non-serving base station transmits messages acknowledging receipt of packet data from the MCD, the non-serving base station transmits (408) at the target level.