47results about How to "Reduce retransmission delay" patented technology

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.

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.

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.

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.

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.

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.

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.

The invention provides a method and device for processing an HARQ (Hybrid Automatic Repeat Request) in a spatial multiplexing mode. The method comprises the following steps of: storing layer number and modulation and coding scheme (MCS) parameters used by new transmission of a transport block (TB) for HARQ transmission of user equipment (UE) as well as the retransmission times of each TB, and receiving and storing rank indication and channel quality indication information latterly reported by the UE by a base station; performing rank self-adaptive processing by the base station to obtain a layer used at a current transmission time interval (TTI) of the UE; and determining the TB of the HARQ waiting to be retransmitted at the current TTI of the UE and the MCS used by each TB according to the layer number and the MCS parameters used by new transmission of the TB transmitted by the HARQ of the UE, the retransmission times of each TB, the rank indication and channel quality indication information latterly reported by the UE and the layer used at the current TTI of the UE, obtained by rank self-adaptive processing. According to the method and the device, the retransmission time delay of the TB can be shortened.

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.

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.

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.

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.

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.

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.

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.