206results about How to "Reduce data transmission delay" patented technology

The invention discloses a data transmission method of edge MBMS service and a correlation device. The method is applied to a data transmission system of MBMS service. The system internally comprises a center BM-SC disposed at a core network, an edge BM-SC disposed at the edge of the network, and an MBMS GW. The method comprises the following steps: the center BM-SC creating a control surface bearer context; the center BM-SC sending a session starting request to the edge BM-SC so as to enable the edge BM-SC to create a user surface bearer context; and the center BM-SC receiving a session starting response sent by the edge BM-SC; and the center BM-SC issuing a service key to the edge BM-SC so as to enable the edge BM-SC to encrypt data of the edge MBMS service by use of a service key pair and send the data to UE through the MBMS GW. According to the invention, data transmission time delay of the edge MBMS service can be reduced, and application of the bandwidth of the core network for data transmission of the edge MBMS service is reduced.

An adapting method of channel includes carrying out estimation on state of current channel by user terminal for obtaining CQI data, adjusting CQI data according to preset revision parameter and sending adjusted CQI data to base station, selecting modulation coding mode by base station according to adjusted CQI data and send data to user end. The device used for realizing said method and another adapting method of channel are also disclosed.

A low-power media access control method of node dynamic sleeping includes the following steps: (1) organizing the network topology to clustering topology and realize a coarse-grained clock synchronization between the node inside the cluster and the cluster head and make the node work and sleep periodically; (2) the nodes have three operating modes: a sending mode, a receiving mode and a cycle work mode, wherein the node of the cycle work mode is characterized in that the nodes work or sleep periodically and the actual work and sleep time period of the nodes changes dynamically and the operation sub-time-period of the neighboring node can be calculated; (3) in one work cycle, the operation sub-time-period of any two adjacent nodes can be overlapped to guarantee the communication; (4) the node can intercept the packet sent by the adjacent node and adjust the sleep time period according to the information carried by the packet to reduce the carrier interception times; (5) dynamically adjusting the busy and idle degree of the node according to different data sampling rates so as to reduce the power consumption while guaranteeing the throughput. The method, which is simple and reliable, has advantages of low power consumption, short delay, strong adaptive capacity and effectively prolonged life cycle of the network.

Disclosed is an asynchronous MAC based sensor node using a Wake-Up RF. The sensor node includes a main transceiver to transmit/receive data, a Wake-Up transceiver to transit a state of the sensor node; and a micro-control unit, which transmits a Wake-Up frame to at least one receiving node through the Wake-Up transceiver such that the receiving node is activated from an inactive state into an active state and transmits data to the activated receiving node through the main transceiver. The asynchronous MAC based sensor node reduces unnecessary power consumption, hop-by-hop delay, and overhead required for timing synchronization, thereby implementing an effective sensor

The invention relates to the field of communication and discloses a method and device for reporting terminal capability information. The method includes the steps that after a terminal receives terminal capability inquiry information sent by network side nodes in a satellite communication system, terminal capability information messages are returned to the network side nodes, therefore, the network side nodes directly or indirectly obtains transmitter performance parameters and receiver performance parameters of the terminal based on the terminal capability information messages, and the terminal is dispatched for data transmission according to the transmitter performance parameters and the receiver performance parameters. Therefore, the network side nodes can smoothly obtain the terminal capability information so that the network side nodes can perform reasonable dispatching on the terminal in the satellite communication system, while the resource utilization rate and uplink and downlink transmitting power are improved, a data transmission delay is shortened, and the overall performance of the satellite communication system is improved.

The invention discloses a communicating method of time-division duplex communicating mobile system, which comprises the following steps: (1) setting minimum unit and system frame structure of time gap TTI of transmission time with each wireless frame containing several business time gaps and special time gaps within at least two conversion protecting time gap; adopting several business time gap as unit for TTI; (2) coding frame structure of sent data according to step (1); sending through modulated RF; (3) demodulating the received data; obtaining corresponding data of decoded frame structure according to step (1); returning the answering information of preset TTI of step (1); providing convenience to send next data; finishing data transmission. The specific time gap contains one UpPTS and one DwPTS time gap or DwPTS time gap.

A multiplexin method for dispatching middle uplink logic channel in semi-static state of an LTE system comprises sending semi-static data by user UE on semi-static dispatching resources assigned on a base station, and data whose priority is higher than semi-static data on the semi-static dispatching resources are to be sent when the cycle of semi-static dispatching transmission reaches, UE generates conventional buffer state report BSR of high-priority data, the transmission of dispatching request SR is triggered when judging that residual resources after semi-static dispatching resources fill in semi-static data are insufficient for sending BSR and only semi-static dispatching resources exist. The embodiment of the invention can avoid increasing data transmission time delay and segmented overhead for semi-static dispatching.

The invention discloses a Beidou data lost message retransmission method and system. The method comprises the following steps: a Beidou receiving terminal, after receiving short message data, analyzing and verifying the data and sending sequence number information of all lost messages and original sending time of the group of short message data back to a Beidou sending terminal; and the Beidou sending terminal, after receiving a retransmission request, according to the original sending time, querying a corresponding Beidou short message group from a sending record, according to sequence numbers of all lost short message data, extracting the corresponding short message data, and resending the short message data to the Beidou receiving terminal through a Beidou satellite. According to the invention, the Beidou receiving terminal, according to the loss condition of the short message data, sends the sequence number information and the original sending time of all the lost short message data at a time, such that the lost message retransmission reaction frequency between the Beidou sending terminal and the Beidou receiving terminal can be effectively reduced, the generated network cost and the data transmission time delay are effectively reduced, and the data transmission efficiency is substantially improved.

The invention discloses a virtual network mapping method which includes the steps that 1, a request queue and a service gateway queue are generated; 2, whether a virtual request resource which is not mapped successfully exits or not is judged, and if yes, step 3 is executed; if not, virtual resource request mapping is ended; 3, a service gateway is selected; 4, underlying cluster selection is conducted; 5, whether virtual resource request mapping is solvable or not is judged, if yes, virtual network mapping is conducted, an underlying physical network resource state is updated, the request is deleted, and step 2 is executed; if not, step 6 is executed; 6, whether the underlying cluster range is smaller than the service gateway management region or not is judged, if yes, the underlying cluster range is broadened, and step 5 is executed; if not, the service gateway is deleted, and step 7 is executed; 7, whether the service gateway queue is empty or not, and if not, step 3 is executed; if yes, step 8 is executed; 8, whether times of queuing again exceed the preset times or not is judged, if yes, the request is rejected, and step 2 is executed; if not, the request is sent to a waiting queue, and step 2 is executed. By means of the virtual network mapping method, the mapping success number is maximized.

The embodiment of the invention relates to a method for adjusting initial-transmission block error rate IBLER. The method comprises the following steps: the power limit situation of a user is acquired; when user power is limited, a channel quality indicator CQI reported by the user is adjusted to ensure that the IBLER of the user converges at a first IBLER target value; and when the user power is not limited, the power is adjusted to ensure that the IBLER of the user converges at a second IBLER target value, wherein the first IBLER target value is more than the second IBLER target value. Another embodiment of the invention relates to a base station. By adopting the method and the base station, IBLER different adjustment modes are chosen according to the power limit situation of the user; when the power is limited, the IBLER converges at the working point with optimum power efficiency by adjusting the CQI; and when the power is not limited, the IBLER of the user converges at a lower target value by increasing transmit power, so as to promote system throughput and reduce data transmission delay.

The invention discloses buffering and overtime processing methods of route address mapping information as well as a tunnel router, in order to reduce the updating frequency of the route address mapping information in an ITR (ingress tunnel router) buffer and reduce the data packet forwarding of a DM (default mapper). The buffering method of the route address mapping information comprises the following steps: mapping information records comprising route address mapping information and the number of use of the route address mapping information are buffered in the ITR; and after the route address mapping information transmitted by the DM is received, the received route address mapping information is added into the buffer according to the number of use in the buffered mapping information records. According to the invention, the forwarding paths of data packets are optimized, and the end-to-end data transfer delay can be reduced.

The invention discloses a channel binding transmission based multichannel dynamic allocation method in a narrow-band communication system. A data sending terminal is used for executing the follow procedures: selecting channels in normal communication; calculating the present load of each channel in normal communication and sorting the channels according to the loads of the channels in the order of from the lightest to heaviest; according to the length of the present data to be sent, analyzing the channels in the sort order; calculating the number of the channels for binding transmission and determining the channels for binding transmission; according to the present loads of the determined channels for binding transmission and on the premise that the sending time of the present data packet is shortest, calculating the length of data segment allotted to each channel; according to the computed result, dividing the present data packet to obtain a group of data segments, packing the data segments, and allotting each packed data segment to the designated channel for binding transmission. The data receiving end is used for executing the follow procedures: receiving the data segment sent from each channel; analyzing the information of each data segment; recovering the data segments subjected to binding transmission into the whole data.

The invention provides a multi-relay selection cooperative transmission method and a multi-relay selection cooperative transmission system. The method comprises the following steps that: a sender selects a first cooperative node and sends a cooperative request-to-send (CRTS) packet to a receiver and the first cooperative node; the first cooperative node sends a first request-to-helper (RTH) packet to the sender and the receiver; after receiving the first CRTS packet and the first RTH packet, the receiver selects a second cooperative node and sends a helper-to-send (HTS) packet to the second cooperative node; the second cooperative node replies a second RTH packet to the sender and the receiver; the receiver determines a final cooperative node and sends a cooperative clear-to-send (CCTS) packet to the sender; and the sender transmits data to the receiver through a final cooperative node. By using the method, the problem of collision caused by the participation of a plurality of intermediate nodes at the same time is solved; data transmission delay is effectively shortened; and data throughout is improved.

The present invention discloses a resource allocation method of a virtual machine and a device thereof, for improving performance of the virtual machine, and relates to the field of communication technology. The method comprises: obtaining resource allocation parameters of the virtual machine, the resource allocation parameters including scheduling parameters which is used for indicating at least two of physical processor resource, physical memory and physical input-output IO device assigned to the virtual machine to be located in the same processor node, and allocating physical resource for the virtual machine according to the resource allocation parameters. The present invention may be applied in the virtual machine technique.

The invention relates to a multi-rate adaptive cooperative access method and a multi-rate adaptive cooperative access system. The multi-rate adaptive cooperative access method comprises the following steps that: after failing to receive a data packet from a source node, a destination node returns a negative acknowledgement (NACK) packet to the source node; after intercepting the NACK packet, intermediate nodes perform cooperative handshaking processing with the destination node according to basic cooperation conditions and rate grading conditions, and cooperative nodes are selected from the intermediate nodes; and the cooperative nodes transmit the received data packet to the destination node. By the method and the system provided by the invention, unnecessary conflicts of competition are effectively avoided, and are decomposed by adopting rate grading, so that an extremely small number of cooperative nodes can be selected from a great number of intermediate nodes within the shortest time, a data transmission delay is effectively shortened, and the data transmission performance of the network is improved.

The embodiment of the invention provides a data transmission method and apparatus, and a network system, and relates to the technical field of communication. The following problem in the prior art issolved: in a communication system adopting the dual-connection technology, when UE transmits service data, a communication connection always needs to be established between a primary base station anda secondary base station, which increases the power consumption of the UE, thus shortening the standby time of the UE. The method comprises the following steps: when it is determined that the UE is ina power control adjustment period T1 according to a system message, the UE obtains a first air interface signalling message sent by the primary base station; the UE determines an anchor base stationthat receives the uplink data of predetermined service within the power control adjustment period T1 according to a service category of the predetermined service and the first air interface signallingmessage, and sends a second air interface signalling message to the anchor base station; and the UE determines target transmitting power P1 according to an RSRP mean and a third air interface signalling message, and sends the uplink data of the predetermined service to the anchor base station at the target transmitting power P1. The data transmission method and apparatus provided by the embodiment of the invention are used for manufacturing UE and base stations.

The invention discloses an accounting method. The accounting method comprises steps that a business request of user equipment (UE) is received by an edge calculation network element disposed on a mobile wireless network side; when corresponding content is cached locally according to the business request, the corresponding content is transmitted to the UE; flow information is transmitted to a charging network element disposed on a core network side. The invention also discloses an accounting system, the edge calculation network element, the accounting network element, a base station, and a packet data network gateway(P-GW).

The invention relates to a reliable transmission method for named data network data fragments based on byte numbers, and belongs to the technical field of computer network data transmission. The method comprises the following steps: a publisher numbers each item of data content according to bytes; a requester sends an inquiry interest packet and compares the maximum transmission unit MTU record minimum values of the forwarding nodes; the publisher replies the response data packet to inform the byte length, the starting byte number and the maximum transmission unit, wherein the request interestpacket sent by the requester comprises the name and byte number range of the data content to be acquired; the publisher encapsulates the data content of the corresponding byte into a content data packet and replies the content data packet to the requester; the requester waits for receiving the content data packet and prepares to retransmit the request interest packet; the requester receives and verifies the content data packet, and determines to retransmit the request interest packet or continuously request the subsequent content data packet according to the verification result; and the requester correctly receives the complete data content and then finishes data transmission. According to the method, reliable data transmission and link congestion avoidance are realized.

The present invention discloses a terminal wake-up control method, and belongs to the technical field of wireless communications. The method includes the steps of: monitoring a channel state of an unlicensed frequency band by a base station; according to the monitoring result of the channel state of the unlicensed frequency band, occupying the unlicensed frequency band; and at the at least two first time points in the frequency occupation time phase, sending wake-up signals to a terminal through the unlicensed frequency band. When the base station supports the unlicensed frequency band, afterthe base station successfully occupy the unlicensed frequency band, on the at least two first time points in the unlicensed frequency band time phase, wake-up signals are sent to the terminal throughthe unlicensed frequency band to allow the base station to wake up the terminal for many times in the primary occupation of unlicensed frequency band to reduce the condition that downlink data corresponding to the reached business is required to be sent to the terminal only after the next successful occupation of the unlicensed frequency band in the process of the primary occupation of unlicensedfrequency band so as to reduce the data transmission delay off the terminal.