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48results about How to "Reduce retransmission delay" patented technology
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Method for reducing HARQ retransmission time interval in multi-carrier system and base station
ActiveCN101784076ALower the maximum number of processesReduce RTTError prevention/detection by using return channelSynchronisation arrangementTime domainCarrier signal
The invention provides a method for reducing an hybrid automatic repeat request (HARQ) retransmission time interval in a multi-carrier system, which comprises the following steps that: a base station carries out aggregation on a plurality of carriers, wherein the allocation of at least one carrier is different from that of other carriers so as to increase the distribution of uplink resources on a time domain in a system; and the base station sends data on the aggregated carriers. By increasing the number of the subframes of the uplink resources in the system, the method reduces the HARQ maximum processes and round-trip time (RTT) in the system while guaranteeing to meet the requirements of the ratio of total uplink subframes and total downlink subframes of the system. The method sufficiently utilizes the multi-carrier property of the system and reduces the HARQ retransmission delay in the system so as to improve the transmission efficiency of the system.
Owner:DATANG MOBILE COMM EQUIP CO LTD
Data packet retransmission control method and network side equipment
InactiveCN101924625ADetect packet lossReduce retransmission delayError prevention/detection by using return channelTime delaysNetwork packet
The embodiment of the invention provides a data packet retransmission control method and data packet retransmission control network side equipment. The method is executed by the network side equipment, and comprises the following steps of: receiving data packets from a server; acquiring serial number information carried by the data packets from the data packets; detecting the continuity of the data packets according to the serial number information; and performing data packet retransmission control according to the continuity of the data packets. The embodiment of the invention can earlier and more quickly detect the loss of the data packets, perform corresponding retransmission control in advance, shorten retransmission time delay and solve the problem of data transmission traffic stoppage caused by overlong time delay.
Owner:HUAWEI TECH CO LTD
Method for requesting and transmitting status report of a mobile communication system and therefor apparatus
InactiveCN101116277AReduce retransmission delayError prevention/detection by using return channelRadio Link ControlMobile communication systems
A method and apparatus are provided for reducing excessive retransmission delays which may occur due to the loss of the last packet of a transmission buffer in a Radio Link Control (RLC) layer of a mobile communication system. The method includes receiving a Service Data Unit (SDU) from a higher layer, dividing the SDU into a plurality of Packet Data Units (PDUs), and storing the PDUs in a buffer, setting a poll bit for a last PDU from among the PDUs stored in the buffer, the poll bit requesting a status report, and repeatedly transmitting the last PDU having the setup poll bit at least twice from a sender to a receiver, regardless of whether there is a request for retransmission of the last PDU.
Owner:SAMSUNG ELECTRONICS CO LTD
Method, system and device for transmitting data
ActiveCN101547469AAvoid waitingReduce traffic shockError prevention/detection by using return channelNetwork traffic/resource managementTraffic volumeTraffic capacity
The invention discloses a method, a system and a device for transmitting data, which belong to the field of communication. The method comprises the following steps: loading data pockets transmitted by a radio network controller RNC to at least two carrier frequencies for transmitting and respectively carrying out backup save on the data pockets loaded on the carrier frequencies in a preset buffer by a base station; obtaining the transmitting status of the data pockets; and deleting the data pockets which are transmitted correctly and backup saved in the buffer according to the transmitting status, and loading the backup data pockets which are transmitted incorrectly and backup saved in the buffer to another carrier frequency for transmitting. The system comprises the radio network controller RNC and the base station. The preset buffer is arranged on the base station NodeB to carry out buffer and backup on the received data pockets, and the data pockets are directly acquired from the buffer of the base station when the data pockets need retransmitting so as to decrease the flow impact to the RNC and the NodeB caused by an Iub interface and avoid unnecessary retransmission of an RLC layer.
Owner:HUAWEI TECH CO LTD
High-performance load balancing system and method based on software defined network
ActiveCN110191065AReal-time perception of traffic rateSolve the problem of the long-tail incubation period of rat flowChannel coding adaptationForward error control useTopology informationPacket loss
The invention discloses a high-performance load balancing system based on a software defined network. The high-performance load balancing system mainly solves the problems of uneven load and link congestion in a network core layer of an existing data center. The system comprises a Fat-Tree underlying network and an SDN controller, and Fat-Tree bottom layer network is provided with a flow samplingdetection module, a DCTCP flow control module and a coding transmission module based on FEC, and the functions of sensing flow in real time, distinguishing mouse flow image flow, adjusting the flow rate of a port according to link time delay and adding a redundant packet to reduce mouse flow time delay are completed respectively. The SDN controller is additionally provided with a topology information module and an image flow scheduling module which are used for storing topology information of an underlying network and scheduling an image flow to a path with the minimum path cost. According tothe invention, retransmission delay caused by packet loss is reduced, the problem of blocking of the head and the tail of a mouse stream is solved, the image stream throughput is improved, and the method can be used for Fat-Tree data center network topology.
Owner:XIDIAN UNIV
Method for reducing retransmission delay time of HSUPA data
InactiveCN101277250AReduce latencyResolution delayError prevention/detection by using return channelData switching by path configurationPre conditioningTime delays
The invention discloses a method for reducing HSUPA data retransmission time-delay. The method provides data transmission report in MAC layer to UE RLC by employing UE MAC, assistant processes data retransmission of RLC AM entity. Under the pre-condition of no-changing network side, no-adding interface, the method provided by the invention starts data retransmission in RLC layer in advance through carrying little bit of information in prior interface in suitable time, reduces HSUPA data transmission time-delay, and reduces pressure of data cushion in UE side factually. The method is easy to realized, and has strong practicability.
Owner:上海宇梦通信科技有限公司
Error control mechanism for a segment based link layer in a digital network
InactiveUS20050265389A1Easy to implementRequired memory structure is simpleError prevention/detection by using return channelTime-division multiplexInter layerData link layer
There is disclosed a method of transmitting data packets from a transmitter to a receiver -each having a stack of communication protocol layers which comprises a data Link Layer (LL), by using a Segmentation And Re-assembly (SAR) mechanism implemented within a SAR layer intermediate between the LL and an upper layer, as well as an error recovery mechanism implemented within the LL. The SAR mechanism performs, in a transmission direction, the function of segmenting Parent Packets (PPs) handled by the upper layer into consecutive segments of shorter length and the function of providing some segmentation information. The segmentation information comprises, for each segment, a two-level sequence numbering comprising a PP Sequence Number (PPSN) which identifies the PP which said segment belongs to, and a Segment Sequence Number (SSN) which identifies the rank of the segment within the PP. The error recovery mechanism implements a selective retransmission scheme using forward and / or feedback signalling messages which embed the two-level segment numbering. In the receive direction, the SAR mechanism delivers to the upper layer a PP of given PPSN of which all constitutive segments are correctly received and re-assembled, irrespective of whether all PPs of sequence number lower than that PPSN are already delivered.
Owner:MITSUBISHI ELECTRIC CORP
Method, device and system for acquiring streaming media data
InactiveCN103384236AReduce retransmission delayReduce consumptionWireless network protocolsTransmissionMedia serverBase station
The invention provides a method, device and system for acquiring streaming media data. Segment data returned from a media server are stored through a base station, and thus, when the segment data sent to a UE from the base station are lost and the UE sends the same segment request to the base station again, the base station does not send the segment request to the media server any more and sends the stored segment data to the UE. The retransmission delay of empty media data is lowered, and consumption of bandwidth caused by retransmission on a network side is also saved.
Owner:HUAWEI TECH CO LTD
Adhoc network data transmission method and device
ActiveCN105451362AImplement self-testImprove performanceWireless communicationTime delaysNetwork data
The invention discloses an adhoc network data transmission method and an adhoc network data transmission device. The adhoc network data transmission method comprises the steps that: a node sends a first synchronous sequence in a full-duplex manner at a predetermined time slot, and a receiving channel of the node is detected at the same time, wherein the first synchronous sequence is used for completing gain adjustment and coarse frequency offset estimation; and the node determines the conflict situation of the predetermined time slot by adopting a method based on radio frequency interference cancellation. The adhoc network data transmission method and the adhoc network data transmission device detect the receiving channel of the node when the node sends the first synchronous sequence, determine whether conflict occurs at the time slot used by the node according to the detection result, achieve self-detection of conflict situation at the time slot used by the node, increase conflict detection accuracy, greatly reduce retransmission time delay of node information, and increase network performance.
Owner:DATANG MOBILE COMM EQUIP CO LTD
Method and device for processing HARQ (Hybrid Automatic Repeat Request) in spatial multiplexing mode
ActiveCN102237987AReduce retransmission delayIncrease profitError prevention/detection by using return channelChannel coding adaptationSelf adaptiveTransmission Time Interval
Owner:ZTE CORP
Message sending method and apparatus, chip and terminal
ActiveCN108023683AReduce retransmission delayData transfer is smoothError prevention/detection by using return channelNetwork traffic/resource managementCommunication interfaceApplication processor
The embodiment of the invention provides a message sending method and apparatus, a chip and a terminal. The method is applied to the terminal, and the terminal comprises a baseband processor, an application processor and a communication interface. The method comprises the following steps: the baseband processor reports information of a first message to the application processor, wherein the firstmessage is a to-be-sent message discarded by the baseband processor; the application processor transmits a second message to the baseband processor according to the information of the first message, wherein the second message is the same as the first message; and the baseband processor sends the second message to a network device through the communication interface. In this way, the message retransmission delay of the terminal can be reduced to a certain extent, and the data communication between the terminal and the network is smoother.
Owner:HUAWEI TECH CO LTD
Data sending method, terminal equipment and network equipment
ActiveCN108633014ALighten the loadReduce overheadError prevention/detection by using return channelWireless network protocolsTime delaysTerminal equipment
The embodiments of the invention provide a data sending method, terminal equipment and network equipment. The method comprises the following steps that the terminal equipment receives first schedulinginformation, the first scheduling information is used for indicating a first resource, the first resource is used for sending the resource of a first transmission block, and the first scheduling information is also used for indicating a probability value, wherein the probability value is the block error rate of the network equipment which receives a first transmission block on a first resource orthe success probability of the network equipment which receives the first transmission block on the first resource; and the terminal equipment sends the first transmission block on the first resourceaccording to the first scheduling information. In the invention, the terminal device can determine whether to carry out preparation operation for retransmitting all or part of the first transmissionblock according to a probability value, and then the time for retransmitting the part of or all the first transport block can be shortened and retransmission time delay is reduced.
Owner:HUAWEI TECH CO LTD
Message processing method and device
PendingCN111404840AAvoid knock-on effectsImprove service qualityData switching networksTime delaysEngineering
The invention provides a message processing method and device, which can avoid the chain influence of abnormal messages on uncertain target flows caused by abnormal bottom-layer time delay. The methodcomprises: a first device receiving a first message sent by a second device, the first message carrying a first label, the first label being determined according to a period of the second device whenthe first message is sent; the first device determining whether the first message is a normal message according to the first label; if it is determined that the first message is a normal message, thefirst device determining a second message according to the first message, and the second message carrying a second label; and the first device sending a second message to a third device in the firstperiod, wherein the second label is determined according to the first period.
Owner:HUAWEI TECH CO LTD
Adaptive error detection method used for cellular mobile communication system
InactiveCN102111255AAccurate retransmissionAvoid retransmissionError prevention/detection by using return channelAir interfaceTimer
The invention discloses an adaptive error detection method used for a cellular mobile communication system. The method comprises the following steps of: respectively performing time interval (TI) sampling used for calculating the time interval of received two adjacent protocol data units (PDUs) and TI smoothing used for realizing filtering in a radio link control protocol layer entity; performinground trip time (RTT) sampling used for acquiring a round-trip delay of each protocol data unit (PDU), RTT smoothing used for realizing the filtering, k sampling used for acquiring the repeat number of each error protocol data unit, and k smoothing used for realizing the filtering in a medium access control (MAC) layer; and setting a time-out value of a reordering timer. The method detects the lost packets of the MAC layer accurately and timely, avoids unnecessary repeat of radio link control (RLC), and reduces the repeat delay of the packets by adaptively estimating the repeat time of MAC PDU and optimizing a t-reordering value of a selective repeat-automatic repeat request (SR-ARQ). By using the method, low complexity is realized without increasing the overhead of an air interface of a radio link.
Owner:SOUTHEAST UNIV
Fault-detection, retransmission and fault-tolerant router unit based on triple modular redundancy
ActiveCN106487673AImprove transmission reliabilityReduce retransmission delayData switching networksHigh level techniquesReal-time computingNetwork packet
A fault-detection, retransmission and fault-tolerant router unit based on triple modular redundancy comprises an arbitration unit, a switch, a decoding module, four port input units and a local input unit. The arbitration unit performs output sequence control on input data packets and acquires a control signal for outputting to the switch. The switch successively outputs the input data packets according to the control signal. The decoding module performs decoding verification on data which arrive at a target node. Each port input unit is used for receiving input data packets in one direction, performing error verification, calculating a routing path and outputting the data packets according to a link state and a retransmission request which are fed back by a next-grade router. The local input unit receives data which are input through a local port, performing packing processing, performing error verification, calculating the routing path, and outputting the data packets according to the link state and the retransmission request of the target node. The fault-detection, retransmission and fault-tolerant router unit has advantages of improving transmission reliability of the data packets, and satisfying performance requirements of transmission time delay, area, power consumption, etc.
Owner:BEIJING MXTRONICS CORP +1
Data transmission method and electronic equipment
ActiveCN112436924AGuaranteed transmission reliabilityReduce retransmission delayError prevention/detection by using return channelSignal allocationTransmission channelData transmission
The invention discloses a data transmission method and electronic equipment, and the method is used for an application receiving end configured in first equipment, and comprises the steps: receiving adata message in a message set corresponding to a current message transmission period through a first transmission channel; obtaining a receiving boundary moment corresponding to the message transmission period reported by the first transmission channel at least according to the transmission delay parameter on the first transmission channel and the starting moment of the message transmission period, wherein the message transmission period is a period in which the application sending end configured in the second device sends the data message through the first transmission channel; when the current moment reaches the receiving boundary moment, obtaining a target data message which is not received by the application receiving end in the message set; obtaining a response message correspondingto the target data message; and at least transmitting the response message to the application sending end, so that the application sending end resends the target data message corresponding to the response message to the application receiving end through the first transmission channel and the second transmission channel at the same time.
Owner:LENOVO (BEIJING) LTD
Data transmission method of internet of vehicles, sending terminal and network side equipment
InactiveCN111147202AReduce overheadReduce retransmission delayError prevention/detection by using return channelTransmission path divisionData transmissionHybrid automatic repeat request
Provided are a data transmission method of an internet of vehicles, a sending terminal and network side equipment, the method comprising: receiving retransmission configuration sent by the network side equipment, the retransmission configuration being used for indicating pre-allocated retransmission resources; and performing hybrid automatic repeat request (HARQ) retransmission corresponding to the initial transmission on the pre-allocated retransmission resources. According to the invention, pre-allocated resources are pre-configured through the network side equipment, so that when the initial transmission fails, a retransmission resource does not need to be applied to the network side equipment, the signaling overhead can be effectively saved, and the data retransmission time delay can be effectively reduced, the problems of huge feedback resource consumption and time delay multiplication of an HARQ (Hybrid Automatic Repeat Request) mechanism adopted in a network side distributed sidelink transmission mode are solved, and the low time delay and high reliability of sidelink data transmission are effectively guaranteed.
Owner:DATANG MOBILE COMM EQUIP CO LTD
Method for reducing HARQ retransmission time interval in multi-carrier system and base station
ActiveCN101784076BReduce retransmission delayImprove transmission efficiencyError prevention/detection by using return channelSynchronisation arrangementTime domainCarrier signal
The invention provides a method for reducing an hybrid automatic repeat request (HARQ) retransmission time interval in a multi-carrier system, which comprises the following steps that: a base station carries out aggregation on a plurality of carriers, wherein the allocation of at least one carrier is different from that of other carriers so as to increase the distribution of uplink resources on atime domain in a system; and the base station sends data on the aggregated carriers. By increasing the number of the subframes of the uplink resources in the system, the method reduces the HARQ maximum processes and round-trip time (RTT) in the system while guaranteeing to meet the requirements of the ratio of total uplink subframes and total downlink subframes of the system. The method sufficiently utilizes the multi-carrier property of the system and reduces the HARQ retransmission delay in the system so as to improve the transmission efficiency of the system.
Owner:DATANG MOBILE COMM EQUIP CO LTD
Method and system for enhancing transmission reliability of video information over wireless channels
InactiveCN101395911ASave bandwidthReduce retransmission delayError prevention/detection by using return channelPulse modulation television signal transmissionTransmitterTransmission errors
A method and system for enhancing transmission reliability of video information over a wireless channel is provided. The video information includes pixels, each having a plurality of components and each component including video information bits that are placed in sub-packets within a packet. Error detection information is determined for one or more sub-packets, and placed in the packet. Then the packet is transmitted from a transmitter to a receiver a wireless channel, wherein the receiver uses the error detection information per sub-packet to check for transmission errors and request retransmission of erroneous video information bits based on their perceptual importance.
Owner:SAMSUNG ELECTRONICS CO LTD
Method and apparatus for detection local nack in a wireless communications system
InactiveCN101098216AImprove transmission efficiencyReduce retransmission delayError prevention/detection by using return channelTransmission link error control systemCommunications systemComputer science
Owner:INNOVATIVE SONIC
TCP (Transmission Control Protocol) transmission method and device
ActiveCN106657078AIncrease sending priorityReduce retransmission delayError prevention/detection by using return channelNetwork traffic/resource managementData needsComputer science
The invention provides a TCP (Transmission Control Protocol) transmission method and device. A message acknowledgement number of a TCP response message received by a network side and a newest acknowledgement number of a server are obtained; a relation between the message acknowledgement number of the TCP response message and the newest acknowledgement number of the server are judged; if the message acknowledgement number is equal to the newest acknowledgement number of the server, a repeat response count value of the TCP response message is increased; if the repeat response count value is equal to a preset threshold value, a sending priority of a TCP data message corresponding to the TCP response message in a local cache is improved; it indicates that the TCP data message corresponding to the TCP response message is urgent data needing to be uploaded to the network side again; the sending priority of the urgent data is improved through a base station; and the TCP data message is transmitted preferentially, so the TCP data message is transmitted timely.
Owner:COMBA TELECOM SYST CHINA LTD
NoC (Network on Chip) error detection correction retransmission fault-tolerant method based on dual modular redundancy
InactiveCN107682118AImprove reliabilityGuaranteed correctnessError prevention/detection by using return channelTransmitted data organisation to avoid errorsDependabilityNetworks on chip
The invention relates to a NoC (Network on Chip) error detection correction retransmission fault-tolerant method based on dual modular redundancy. A source node sends a data packet to a target node, wherein the data packet comprises two same packet header microchips and a plurality of data microchips; after receiving the data packet, an intermediate node carries out error detection correction retransmission of dual modular redundancy on the packet header microchips, and transmits the correct packet header microchips and data microchips to a next node; and after receiving the packet header microchips and the data microchips, a target node carries out error detection correction retransmission on all the microchips. According to the invention, difference in importance in the data packet transmission process is utilized, error detection correction retransmission fault tolerance and dual modular redundancy fault tolerance are adopted, a fault-tolerant ability of a NoC is improved, reliability of data packet transmission can be ensured highly, and meanwhile, the NoC error detection correction retransmission fault-tolerant method gives consideration to performances of transmission delay,power consumption, effective data throughout and the like.
Owner:BEIJING MXTRONICS CORP +1
An adaptive cross-carrier hybrid automatic repeat request processing method and application
ActiveCN111130712BReduce retransmission delayEasy to retransmitError prevention/detection by using return channelTime delaysCarrier signal
The invention belongs to the technical field of digital information transmission, and discloses an adaptive cross-carrier hybrid automatic repeat request processing method and system. The method comprises the steps that high-frequency-band data transmission is carried out, and the data is aggregated through a special A-MPDU; new transmission and retransmission information transmission is carried out; a receiver receives the data and carries out BA feedback, a the sender selects a retransmission scheme and carries out retransmission indication according to the BA feedback information; and the receiver receives redundant information of the retransmitted error data according to the instruction, judges a corresponding relationship between the retransmitted information and the error informationreceived last time, combines the retransmitted redundant information with the data received last time, and performs combined decoding. According to the invention, an adaptive cross-carrier retransmission HARQ scheme is adopted, the retransmission information adaptively selects high-frequency-band same-frequency transmission or cross-carrier low-frequency transmission according to the direction ofthe data currently transmitted in the high frequency band, retransmission does not need to wait for the completion of new transmission, and the retransmission time delay is reduced.
Owner:HUAZHONG UNIV OF SCI & TECH
Method, device and system for retransmission in wireless communication system
InactiveCN101084654BReduce retransmission delayError prevention/detection by using return channelNetwork traffic/resource managementCommunications systemControl signal
The invention relates to retransmissions in wireless communication systems. It is proposed to reduce the retransmission delays by utilizing feedback associated with a lower protocol layer than the conventional feedback messages of the ARQ functionality. After sending a packet from a transmitter towards a receiver, the transmitter monitors the link for a low-level control signal from the receiver. The low-level control information can e.g. comprise power control commands or be related to link quality indicators. Based on this signal, it is decided whether a retransmission is to take place, e.g. at the transmitter or at an external control unit.
Owner:TELEFON AB LM ERICSSON (PUBL)
A method, device, chip and terminal for sending messages
ActiveCN108023683BReduce retransmission delayData transfer is smoothError prevention/detection by using return channelNetwork traffic/resource managementCommunication interfaceNetwork data
Owner:HUAWEI TECH CO LTD
Transmission method and device of hybrid automatic requesting retransmission
ActiveCN101094241BImprove reliabilityReduce retransmission delayError prevention/detection by using return channelData switching networksEmbedded system
The present invention discloses a HARQ transmission method comprising: a sending end receives the confirmation message to the independent HARQ PDU; when the confirmation result in confirmation message is ACK, the sending end sends the confirmation result to the receiving end. The present invention also discloses a HARQ transmission device. The HARQ transmission method and device thereof has the advantages of solving the problems that the transmission reliability of the independent HARQ PDU can not be guaranteed in HARQ PDU transmission. Furthermore, with regard to longer spacing interval for transmission between HARQ PDU, the HARQ transmission method and device thereof can also timely detect NACK / ACK errors and reduce retransmission delay of HARQ PDU.
Owner:DATANG MOBILE COMM EQUIP CO LTD
High performance load balancing system and method based on software defined network
ActiveCN110191065BReal-time perception of traffic rateSolve the problem of the long-tail incubation period of rat flowChannel coding adaptationForward error control usePathPingPacket loss
The invention discloses a high-performance load balancing system based on a software-defined network, which mainly solves the problems of uneven load and link congestion in the core layer of the existing data center network. It includes a Fat-Tree underlying network and an SDN controller. The Fat-Tree underlying network is deployed with a traffic sampling detection module, a DCTCP flow control module, and an FEC-based encoding transmission module, which respectively complete real-time perception of traffic and distinguish between mouse and elephant flows. The link delay adjusts the port flow rate and adds redundant packets to reduce the mouse flow delay. The SDN controller is additionally equipped with a topology information module and an image flow scheduling module, which are used to complete storage of the topology information of the underlying network and schedule the image flow to a path with the minimum path cost. The invention reduces the retransmission delay caused by packet loss, solves the problem of head-to-tail blockage of rat flow, improves throughput of elephant flow, and can be used in Fat-Tree data center network topology.
Owner:XIDIAN UNIV
Method, system and device for transmitting data
ActiveCN101547469BAvoid waitingReduce traffic shockError prevention/detection by using return channelNetwork traffic/resource managementTraffic capacityNetwork packet
The invention discloses a method, a system and a device for transmitting data, which belong to the field of communication. The method comprises the following steps: loading data pockets transmitted by a radio network controller RNC to at least two carrier frequencies for transmitting and respectively carrying out backup save on the data pockets loaded on the carrier frequencies in a preset bufferby a base station; obtaining the transmitting status of the data pockets; and deleting the data pockets which are transmitted correctly and backup saved in the buffer according to the transmitting status, and loading the backup data pockets which are transmitted incorrectly and backup saved in the buffer to another carrier frequency for transmitting. The system comprises the radio network controller RNC and the base station. The preset buffer is arranged on the base station NodeB to carry out buffer and backup on the received data pockets, and the data pockets are directly acquired from the buffer of the base station when the data pockets need retransmitting so as to decrease the flow impact to the RNC and the NodeB caused by an Iub interface and avoid unnecessary retransmission of an RLClayer.
Owner:HUAWEI TECH CO LTD
Method and device for triggering and constructing an automatic repeat request status report
ActiveCN103023625BImprove timelinessReduce retransmission delayError prevention/detection by using return channelAutomatic repeat requestAir interface
Owner:ZTE CORP
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