163results about How to "Satisfy latency requirements" patented technology

A coding approach for a robust and flexible network communication protocol is described. By using coding, it is possible to eliminate the need to track packet identities, and hence, it is possible to reduce coordination overhead associated with many conventional protocols. The method and system described herein takes advantage of multiple paths, interfaces, mediums, servers, and storage locations available in a network. The proposed protocol allows quick response to congestion by load balancing over different network resources. The method also enables soft vertical hand-overs across heterogeneous networks. In one embodiment, a media file is divided into chunks and transmitted using a transport protocol tailored to meet delay requirements of media streaming applications. Also described are different coding strategies for chunk delivery based upon an urgency level of each chunk.

Traffic flows of data packets from respective packet queues in wireless stations to a shared transmission medium of a wireless network are scheduled in accordance with Hybrid Controlled Channel Access (HCCA) and Enhanced Distributed Channel Access (EDCA). HCCA is applied by eliminating from consideration for HCCA access flows for which the sum of a desired minimum age of an oldest data packet in the respective packet queue and the time of creation of the oldest data packet is greater than the present time. For flows that are not eliminated from consideration, HCCA access is granted to the flow having a smallest sum of the desired maximum age of the oldest data packet and the time of creation of the oldest data packet. When all traffic flows are eliminated from consideration for HCCA access, EDCA is applied so that traffic flows compete for access to the medium.

The embodiment of the invention discloses an uplink transmission method and a base station. The method comprises the steps of determining a time length of a single transmission time interval t and a time delay correction value k corresponding to a business type by the base station according to the transmitted business type; transmitting an uplink authorization signaling to a terminal, and indicating uplink transmission information of uplink data in the uplink authorization signaling, wherein the uplink transmission information comprises the time of transmitting the uplink data for the first time and the number of times of transmitting the uplink data, or the uplink transmission information comprises the time of transmitting the uplink data for the first time, the number of times of transmitting the uplink data, and a time interval of transmitting the uplink data every two times; notifying the terminal of time length information of t, information of k and the uplink transmission information; and receiving the uplink data transmitted by the terminal according to the time length information of t, the information of k and the uplink transmission information, and finishing uplink transmission. By adopting the uplink transmission method and the base station provided by the invention, the base station is facilitated to adjust an uplink scheduling time delay according to the business type, and the diversified demands of 5G business in the future can be satisfied.

An embodiment disclosed by the invention relates to a cell search method, a cell access method, a cell search device and a cell access device in satellite communication. The cell search method comprises the steps of calculating distances between a mobile terminal and a plurality of satellite base stations, and calculating Doppler frequency shifts of the plurality of satellite base stations relative to the mobile terminal; selecting, from the plurality of satellite base stations, N satellite base stations which are closest to the mobile terminal; for the N satellite base stations , adopting theDoppler frequency shifts of the plurality of satellite base stations relative to the mobile terminal to perform frequency offset compensation; and selecting cells covered by the satellite base stations with the best signal quality from the N satellite base stations for resident. Correspondingly, the cell access method comprises the steps of: calculating a distance between the mobile terminal anda satellite base station to which a target is accessed; calculating propagation delay according to the distance between the mobile terminal and the satellite base station to which the target is accessed; and bringing forward PRACH according to the propagation delay and the frequency shifts, and performing cell access on the satellite base station to which the target is accessed. According to the cell search method, the cell access method, the cell search device and the cell access device, the application of LTE in satellite communication is realized by adopting an in-advance compensation method.

This invention provides a method and a device for sending and acquiring synchronization information block. The method for sending the synchronization information block comprises the steps that a synchronization information block is sent to the user equipment within a first preset region through a first beam in the beam scanning mode, the synchronization information block comprises a main auxiliary synchronization signal, and necessary system information; the synchronization information block is sent to the target user equipment within a second preset region outside the first preset region through a second beam in the beam scanning mode; wherein the transmitted power of the second beam is greater than the transmitted power of the first beam; the interval of the second beam scanning cycle is greater than the interval of the first beam scanning cycle. Through the adoption of the method for sending the synchronization information block, under the condition that less time resources are taken up, the performance of the terminal coverage of a system can be improved, and the system power consumption and wireless resources are saved.

The embodiment of the present invention discloses a service transmission method which comprises a step of receiving the service request sent by user equipment, a step of obtaining the air interface delay tolerance corresponding to the service request, a step of selecting a target transmission mode of transmitting service for the service indicated by the service request according to the air interface delay tolerance, a step of distributing a transmission resource for the user equipment according to the selected target transmission mode such that the user equipment carries out service transmission according to the target transmission mode and the transmission resource. The embodiment of the present invention also discloses a service transmission device. By employing the embodiment of the invention, the service transmission mode can be selected according to the air interface delay tolerance, and thus the time delay requirement of a short time delay service can be satisfied.

The invention discloses a V2X business transmission method. A logical channel of a MAC (media access control) layer is added. A vehicle business channel VTCH is used for transmitting the V2X businessdata. As a Sidelink logical channel, the VTCH and the Sidelink business channel STCH both map to a Sidelink transmission channel. A Sidelink shared channel SLSCH is provided. As an uplink logical channel, the VTCH maps to the transmission channel. An uplink shared channel ULSCH is provided. The method comprises the steps that a vehicle terminal transmits the V2X business data through the VTCH; thevehicle terminal transmits communication D2D business data between devices through the Sidelink business channel STCH. The invention is advantageous in that with the new logical channel, and with thegiven mapping relationship among the new logical channel, the transmission channel and the physical channel, the transmission of the V2X business can be realized.

The invention discloses an OpenStack cloud platform resource dynamic scheduling system and method based on flow affinity. The system includes an OpenStack cloud platform performing a resource scheduling process, a system load monitoring module monitoring and collecting the load information of a physical host in the OpenStack cloud platform cluster and providing the load information to a resource scheduling module, determining the existence of cold spots and hot spots in the cluster and sending a cold spot integration or hot spot elimination request to the resource scheduling process, an SDN monitoring module monitoring and collecting the network topological structure information in the OpenStack cloud platform cluster, the flow information between the physical hosts and the flow information between the virtual machine instances, and providing the information to the resource scheduling module, and the resource scheduling module processing the virtual machine instance initial setup request from the client of the OpenStack cloud platform and the cold spot integration request and hotspot cancellation request from the system load monitoring module. The scheduling system meets the time delay requirements of specific business, realizes load balancing of a cloud platform physical machine cluster and reduces the energy consumption of the cloud platform.

A method allocates resources of a wireless communications network to traffic transmitted to user equipment over a channel of the network. A packet of the traffic to be stored in a selected queue is received. A maximum delay of the selected queue is determined, along with a start time, a finish time, and a queuing order. The packet is inserted in the selected queue according to the start time, the finish time and the queuing order, and then a weight of the selected queue is updated. Then, a next packet to be dequeued from the selected queue is scheduled, and the next packet is transmitted to the user equipment over the channel.

The invention discloses a dynamic network resource reservation QoS guaranteeing method oriented to an industrial SDN. The method comprises a reserved resource application process, a reserved resource forwarding process and a reserved resource releasing process. A data packet with a designated Ethernet type is used for performing the negotiation of the resource reservation between a terminal device and a network, a network switch connected with the terminal intercepts the data packet of this type and sends the same to a controller; the controller reserves a bandwidth resource for the data flow according to the bandwidth and delay requirement of the data flow and the actual application condition of the network bandwidth, or releases the reserved bandwidth resource, and delivers the reserved resource result to the switch in a flow table sending way to be executed. The resource reservation/releasing process is flexibly controlled through a negotiation mechanism, and the supportability on the service data flow especially the period service data flow and the adaptability on the complicated communication state by the network can be improved.

The invention relates to a network slice dynamic joint user association and power distribution method based on NOMA, belonging to the mobile communication field. Under the condition of imperfect downlink channel of NOMA system, the wideband SINR between slice user and RRH is obtained according to the channel state information, and judges the strategy of user and RRH association. According to the user queue state information and the channel state information, the power of a plurality of users in the network slice is multiplexed on the same RB within the maximum number of multiplexed users of the resource block RB, and the optimal power resources are allocated to each user under the premise of satisfying the minimum rate requirements of each slice and user, user delay requirements, system outage probability constraints and forward link capacity constraints. The invention not only improves the utilization rate of spectrum resources and the throughput of the network, but also satisfies thelowest speed requirement of the slice and the user and the time delay requirement of the user.

The invention discloses an end-to-end time delay guarantee transmission scheduling method oriented to an industrial backhaul network. The end-to-end time delay guarantee transmission scheduling method oriented to the industrial backhaul network comprises the two processes of a concentrated time delay distribution process and a segmented time delay guarantee forwarding process. The distribution method comprises the steps that a time delay distribution value of each segment link is calculated by a network manager according to time delay requests and transmission path loading conditions of a business flow, and the time delay requests and business header information are sent to network switches. The forwarding of data business is achieved by the network switches according to the time delay requests of specific business, wherein firstly, business data are placed in a corresponding delay priority buffer queue; then, the data in the time delay priority buffer queue are sent to a Crossbar switching matrix by the corresponding network switch through an experiment priority scheduling mechanism; finally, the timely transmission of the business in the corresponding buffer queue is guaranteed by the adoption of a Crossbar scheduling mechanism. According to the end-to-end time delay guarantee transmission scheduling method oriented to the industrial backhaul network, the fine-grained time delay control mechanism is adopted, so that the supportability and the determinacy of the business end-to-end time delay are improved.

An embodiment of the disclosure provides a method and apparatus for reducing the delay in vehicle-to-vehicle communication. The method comprises the steps of allocating separate scheduling allocation resource pools for messages with different delay requirements; and performing frequency division multiplexing of a scheduling allocation resource pool for a first message requiring a lower delay and a corresponding data resource pool, to reduce the transmission delay of the first message. Compared with the prior art, the embodiment of the disclosure are effective in reducing the transmission delay of the emergency message, thus satisfying the delay requirements for vehicle safety message communication.

The invention provides a communication method and a communication device. the communication method comprises steps: at least one service cell is configured to each terminal, and each service cell works on an unauthorized carrier; at least one is selected from the at least one service cell as a main cell or a main auxiliary cell for each terminal to form a main cell cluster or a main auxiliary cell cluster for each terminal; and according to the main cell cluster or the main auxiliary cell cluster, communication with each terminal is carried out. The technical scheme of the invention can improve the signal transmission probability in the main cell cluster or the main auxiliary cell cluster on the unauthorized carrier, the main cell cluster or the main auxiliary cell cluster can thus be ensured to transmit and receive necessary information and data timely and effectively, and communication time delay and efficiency requirements can be met.

The invention discloses an uplink information multiplexing method. A PUSCH group comprises at least one PUSCH, and each PUSCH in the PUSCH group and the resources of a PUCCH are in the same time unit;the PUCCH comprises a target UCI (Uplink Control Information); a target PUSCH is determined in the PUSCH group according to at least one factor, the target PUSCH being used for bearing the target UCIand discarding the PUCCH; the at least one factor comprises any combination of the PUSCH sending time, a cell sending the PUSCH and the number of modulation symbols after target UCI coding. The invention further provides equipment applying the method. According to the method and the equipment, the problem of how to realize multiplexing of the UCI on the PUSCH by the service with high reliabilityrequirement and low time delay requirement is solved.

The invention relates to a 5G virtual access network mapping method in the time delay sensing condition and belongs to the technical field of mobile communication. According to the method, the difference between the arrivals of virtual network requests, the dynamic occupation and release of limited physical resources, and the difference between the service capabilities of network function virtualization servers are combined, and then a queue state transfer equation is established at a network functional virtualization choreographer and each network function virtualization server. Meanwhile, atwo-stage queue dynamic scheduling method is provided. Furthermore, the queue states of all queues in the system are sensed, so that the queue dynamic scheduling is carried out to meet the time delayrequirement. Moreover, the mapping is completed by taking a minimum mapping cost as a target. According to the 5G virtual access network mapping method, the mapping cost can be minimized, and the timedelay requirement of the system can be met.

The invention discloses a method for packet scheduling of a multi-hop network and a node device, wherein the method comprises the following steps of: acquiring residual time delay and follow-up routeconditions of all data packets; according to the residual time delay and following route conditions, determining the priority of the data packets; and according to the priority, allocating wireless resources to the data packets. The method has the advantages of effectively ensuring the packet scheduling of the high-capacity wireless multi-hop network meets the requirements of the data service on time delay, lowering the probability of discarding of the data packet with more residual hop counts, ensuring the fairness of the packet data services undergoing different hop counts, and avoiding waste of network resources.

The invention discloses a service data transmission method, a base station and a terminal. The method comprises the following steps: determining numerical value configuration Numerology information oftarget service, the maximum transmission times of the service data of the target service and a redundancy version adopted in every transmission according to a transmission performance indicator of the target service; and within the maximum transmission times, sending the service data to the terminal through a transmission resource corresponding to the numerical value configuration information byadopting the redundancy version corresponding to every transmission. The base station disclosed by the invention determines the numerical value configuration information according to the transmissionperformance indicator of the generated service to ensure the delay requirements of the service transmission, and further determines the maximum transmission times and the redundancy version adopted in every transmission according to the transmission performance indicator of the generated service to ensure the transmission reliability of the service data. If the transmission performance indicatorsof the service are different, various parameters configured to the service are different so as to meet different reliability and delay requirements.

The invention provides a bypass blocking method, device, system, and electronic device. The bypass blocking method comprises the steps that a bypass blocking device receives a mirror image report of predetermined message from a distributing device, wherein the distributing device is used for distributing the downstream data of an Internet service provider (ISP network); the bypass blocking devicedetermines whether blocking is required or not based on the mirror image report of the predetermined message, and generates a blocking report having the same destination address as the predetermined message, and sends the blocking report to a plurality of core routers. The invention is advantageous in that the disposition difficulty and cost of bypass blocking can be reduced, and the time-delay demand of the bypass blocking can be guaranteed to a certain degree.

The invention discloses a method for controlling network transmission time delay, a service quality control entity, and a communication device. The method includes the steps: sending a traffic flow delay threshold to a communication device according to a transmission delay requirement of a service flow, wherein the communication device includes a network device and/or user equipment; receiving a time-delay-exceeding-threshold indication send by the communication device, wherein the time-delay-exceeding-threshold indication is used to indicate that the transmission delay of the service flow exceeds the service flow delay threshold; and determining a delay control strategy according to the time-delay-exceeding-threshold indication, so that the communication device that sends the delay control strategy performs the delay control strategy. According to the invention, the method monitors the network transmission delay by setting a service flow delay threshold, and when determining that thetransmission delay of the service flow cannot be satisfied, sets a time delay control strategy to dynamically adjust the network transmission delay, and improves the user experience.

The invention provides a high-speed signal optimization method and system for reference clock lines. The method comprises the following steps: S1, determining routing layer distributions of clock lines in a surface layer and an inner layer according to chip layout and signal line wiring condition thereof, and building a routing model; S2, obtaining lamination information of a simulation waveform based on the routing model, and evaluating propagation speeds of signals in the surface layer and the inner layer; and S3, setting routing lengths in the surface layer and the inner layer by combiningan equal length requirement and a time delay requirement and according to the signal propagation speeds. The method provided by the invention has the advantages that the routing layer distributions ofthe clock lines are determined, the signal propagation speed of each routing layer is calculated according to the laminate information of the simulation waveform, and finally the length of each routing layer is set by combining the equal length requirement and the time delay requirement, so that optimal design of a clock signal line is realized, on the basis that physical equal length is met, thetime delay requirement is also met, a link design risk is reduced, formation of unforeseeable problems is avoided, system design success rate is improved, and signal quality is enhanced.

The invention relates to a cross-region power system protection communication network planning method, comprising the steps of initializing a first generation of populations through adoption of a variable-length chromosome coding method; setting a fitness function, and evaluating fitness of chromosomes according to features of target populations; selecting parental chromosomes according to the fitness function, specifically, selecting the parental chromosomes through adoption of a selection operator, thereby enabling the parental chromosomes to be inherited by a next generation; carrying out cross processing on the parental chromosomes, and generating new chromosomes, thereby improving diversity of species; carrying out variation processing on the parental chromosomes after the cross processing, thereby improving searching capability of the populations; and combining the parental chromosomes and the newly generated chromosomes, as descendants of a current generation of populations, carrying out a next round of evolution until the preset generation number is realized, exiting a loop, and obtaining a final planning scheme, namely the chromosomes with the highest fitness in the last generation of populations. According to the method, a demand of line protection business for delay can be satisfied.

The invention discloses a scalable video stream multicast method based on QoS intelligent perception under SDN environment, which comprises: firstly decomposing a video request into a plurality of sub-requests, then searching a path conforming to network quality service requirements from a client to a server for each sub-request, and finally constructing a base layer multicast tree; and then constructing the enhancement layer multicast tree from the bottom up. When constructing the enhancement layer multicast tree, the current enhancement layer multicast tree is obtained from the upper layer multicast tree through the pruning operation, and then the congested links are rerouted in turn. Through such a bottom-up process, the invention can effectively reduce the number of links occupied by the multicast session and the number of group tables distributed, thereby improving the scalability of the video multicast session. At the same time, the invention adopts the method of multi-path routing to transmit the layered video stream, thereby effectively utilizing the link bandwidth resources in the network and improving the network quality service experience of the user.