123results about How to "Guaranteed Latency" patented technology

A method for dynamic division of the radio capacity in a Time Division Multiple Access (TDMA) system between different packet radio services. Each packet radio service is composed of packets with the same or different priority. Several MSs can share a time slot. Information regarding to the interference for each MS is obtained by a request from a mobile station (MS) or through a traffic measurement at the base transceiver station. This information, along with the QoS contract, is used as criteria in allocating more time slots to packet radio service. A framework of dynamic scheduling for mobile communication (DSMC) comprising a Channel Codec Unit (CCU) and a Packet Control Unit (PCU) determines the service rate upon the required QoS of a user and the interference level.

A system for scheduling multirate multicast packets through an interconnection network having a plurality of input ports, a plurality of output ports, and a plurality of input queues, comprising multirate multicast packets with rate weight, at each input port is operated in nonblocking manner in accordance with the invention by scheduling corresponding to the packet rate weight, at most as many packets equal to the number of input queues from each input port to each output port. The scheduling is performed so that each multicast packet is fan-out split through not more than two interconnection networks and not more than two switching times. The system is operated at 100% throughput, work conserving, fair, and yet deterministically thereby never congesting the output ports. The system performs arbitration in only one iteration, with mathematical minimum speedup in the interconnection network. The system operates with absolutely no packet reordering issues, no internal buffering of packets in the interconnection network, and hence in a truly cut-through and distributed manner. In another embodiment each output port also comprises a plurality of output queues and each packet is transferred corresponding to the packet rate weight, to an output queue in the destined output port in deterministic manner and without the requirement of segmentation and reassembly of packets even when the packets are of variable size. In one embodiment the scheduling is performed in strictly nonblocking manner with a speedup of at least three in the interconnection network. In another embodiment the scheduling is performed in rearrangeably nonblocking manner with a speedup of at least two in the interconnection network. The system also offers end to end guaranteed bandwidth and latency for multirate multicast packets from input ports to output ports. In all the embodiments, the interconnection network may be a crossbar network, shared memory network, clos network, hypercube network, or any internally nonblocking interconnection network or network of networks.

An embodiment of the invention relates to the technical field of wireless communications, particularly to a method and apparatus for triggering and configuring a transmission path so as to configure a plurality of wireless transmission paths that transmit the same service data to a user terminal. According to the embodiment of the invention, a configuration entity selects transmission paths satisfying the delay requirement from the transmission paths the user terminal allows to be used simultaneously; at least two transmission paths capable of satisfying the reliability requirement after combination are selected as service data transmission paths from the transmission paths satisfying the delay requirements; and a network entity and/or user terminal that are involved in transmission are configured according to the determined service data transmission paths. Since the at least two transmission paths capable of satisfying the reliability requirement after combination are selected as the service data transmission paths from the transmission paths satisfying the delay requirement, invention achieves the configuration of the plurality of wireless transmission paths that transmit the same service data to the user terminal.

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.

The invention relates to a 5G mobile edge computing-based task unloading and resource allocation joint optimization method, and belongs to the technical field of mobile communication. According to themethod, a task unloading decision, resource block distribution and computing resource distribution are jointly modeled into a minimum system overhead problem, and the minimum system overhead problemis decomposed into three sub-optimization problems to be solved. The method comprises the following steps of firstly, considering that UE delay sensitivity in an actual network is different, proposinga distributed resource block distribution algorithm based on the UE delay priority, dividing the UE into UE blocks with different priorities according to the UE delay sensitivity, preferentially allocating the resource blocks for the UE with high priorities, and meanwhile, ensuring the communication quality of the UE with low priority; secondly, enabling each piece of UE to make an unloading decision according to the task local computing overhead and the task unloading computing overhead; and finally, with the goal of minimizing the total execution time of the total unloading task in the MECas a target, allocating the computing resources to the UE.

A passive optical network system based on label exchanging protocol of universal multi-protocol is prepared as connecting optical line terminal OLT to multiple optical network unit ONU by wideband passive optical distribution network , using OLT and ONU as edge router and GMPLS domain of said exchanging protocol for being connected to the other GMPLS router in said multi-protocol by communication link , using OLT as intermediate router of integrated service in system individually for controlling all communication activities , using ONU as inlet router of integrated service in system for executing command of OLT .

The invention provides a hybrid memory system which comprises a random storage medium and a non-volatile storage medium. Address encoding is carried out by adopting a unified encoding mode; the non-volatile storage medium is used for storing original data; the random storage medium comprises a write cache unit which is used for mirror image cache of the non-volatile storage medium; and the hybrid memory system also comprises a data index unit for indexing data of the write cache unit, a data check unit for comparing and checking the read or written data and the data stored in the write cache unit, and a data migration unit. The invention further provides a corresponding management method of the hybrid memory system. Through the system and the method, the random storage medium and the non-volatile storage medium exert respective advantages at the same time, a high-efficiency read-write strategy and a data migration mechanism can be achieved, and meanwhile, the read-write reliability can be ensured.

The invention relates to a conflict-free, on-demand multiple access method, comprising: central control node announces collisions of node-sent reserved access packets have occurred and starts up conflict resolution stages, where each conflict resolution stage comprises several forecast burst and forecast confirm micro time gaps set in sequence; in the forecast burst micro time gap, each access conflicting node monitors or sends forecast burst packet according its virtual ID number, and the central control node receives the forecast burst packets; in the following forecast confirm micro time gaps, the central control node sends the results, and each access conflicting node monitors the results; after a node succeeds in access, the central control node sends result broadcast packet. And the invention can assure access conflicting nodes quickly connect to channel and obtain the channel use right and increases service packet transmitting time as far as possible, and increases the throughput of channel.

The invention relates to a NOMA cellular Internet of Vehicles dynamic resource scheduling method based on energy efficiency, and belongs to the field of mobile communication. The method is: in the scenario of a NOMA cellular network supporting V2V communication, according to the reliability of the V2V user, the V2V user delay, the NOMA user rate requirement, and the power limit of the user as constraint conditions, adopting the goal of maximizing long-term average efficiency; creating a random optimization model in combination of subchannel distribution of NOMA users, spectrum distribution ofV2V users and subchannel adjusting strategies. According to the method, the system energy efficiency can be maximized on the premise of ensuring the system stability, and the requirements of V2V usertime delay, reliability and NOMA user rate can be met at the same time.

A shared memory switch is provided for storing and retrieving data from BlockRAM (BRAM) memory of a PLD. A set of class queues maintain a group of pointers that show the location of the incoming “cells” or “packets” stored in the memory in the switch based on the time of storage in the BRAM. A non-blocking memory architecture is implemented that allows for a scalable N×N memory structure to be created (N=number of input and output ports). A write controller stripes the data across this N×N memory to prevent data collisions on read in or read out of data. The data is scheduled for read out of this N×N shared memory buffer based on priorities or classes in the class queues, with priorities being set by a user, and then data is read out from the BRAM.

The present invention discloses a method and an apparatus for establishing a session, and the method comprises: receiving a session request message from a calling terminal, wherein the session request message is used to request the establishment of a P2P session media connection between the calling terminal and a called terminal; according to the session request message, obtaining relay resource of a relay node; establishing the P2P session media connections among the calling terminal, the relay node and the called terminal by using the relay resource. According to the method and the device of the present invention, the P2P session between the calling terminal and the called terminal can be achieved, preventing cross-domain call, ensuring that the terminal delay and improving the user experience.

The invention provides a code stream control method and system, a code stream management method and system, and a terminal device. The code stream control method comprises the following steps: receiving a network data packet, and counting data attributes used for calculating the performance indexes of a communication network of the network data packet; evaluating the performance indexes of the communication network according to the counted data attributes, and recording a frame sequence number of a currently played data frame in the network data packet; feeding back the evaluated performance indexes and the frame sequence number of the currently played data frame to a sending end; and judging whether frame transmission delay is within a predetermined reasonable range in a communication process of a receiving end and the sending end according to the frame sequence number of the currently played data frame fed back by the receiving end, and if so, adjusting the performance indexes of the sending end, so that the performance indexes of the sending end are table. By adoption of the code stream control method, the rationality of bandwidth evaluation is guaranteed to prevent overlarge fluctuation and avoid the pressure to the bandwidth by the overlarge instant code rate in a real-time screen sharing process, and the end-to-end delay is effectively reduced as well.

The invention discloses a method for scheduling resources, which is used for obtaining resource scheduling through a space division multiplexing method and improving scheduling performance. The method includes that whether user equipment is located in a central area or a margin area is determined; when the user equipment is located in the margin area, user equipment is selected from margin-area user equipment which belongs to a different radio remote unit (RRU) from the user equipment in the margin area to be paired with the user equipment in the margin area; identical resources are allocated for the paired user equipment; and when the user equipment is located in the central area, resources are allocated for the user equipment in the central area independently. The invention further discloses a device for achieving the method.

Received data is compressed according to an algorithm, which is a modification of the conventional LZW algorithm. A limited number of hash values are formed, and a code memory is searched at locations corresponding to the hash values. If all of the locations contains a valid code, but none of them contains a valid code corresponding to a potential new code, a dummy code is created, and a counter, which indicates the number of codes created, is incremented. The algorithm can be implemented in parallel in hardware.

The invention belongs to the technical field of equipment maintenance or management, and discloses an aircraft formation hierarchical network access management method and system. The management methodincludes the following steps: initializing aircraft formation network parameters; identifying aircraft node capability state information; defining node comprehensive property parameter indexes by using the node capability state information; constructing a whole network node capability visibility graph according to the comprehensive property parameter indexes; selecting a formation network accessinitiation node according to the consideration of the node capability visibility graph and the geographical location area; completing control information interaction between the network access initiation node and a main topology central control node according to the principle of minimum hop count and a sleep state multipath way-finding mode based on geographic location information; and carrying out information in a formation after the network access initiation node receives network access response so as to make the nodes update a local information field to finish the formation network access.According to the invention, maximum network access efficiency is obtained with lowest cost, the comprehensive performance of formation network access is improved, network communication QoS needs are guaranteed, and the task completion efficiency and quality are improved.

The present specification relates to a method for transmitting uplink data (UL data) in a wireless communication system for supporting a low latency service, and the method executed by a first terminal is characterized by including the steps of: transmitting, to a base station, an urgent signal (US) for informing occurrence of an event related to an urgent situation; receiving, from the base station, a response to the urgent signal through two physical HARQ indication channel (PHICH) resources; and transmitting, to the base station, urgent data including detailed information related to the event that has occurred based on the received response. Each of the PHICH resources is determined by a physical resource block (PRB) index of a resource through which the urgent signal is transmitted.

The invention discloses a multi-target optimization resource distribution algorithm of a MU-MIMO system in a degenerate-rank of channel. The algorithm comprises the following steps: step one, establishing a system model, and analyzing user capacity upper limit and equivalent channel status when being located in rich scattering environment and non-rich scattering environment; step two, establishinga dual-target optimization problem model; and step three, solving the dual-target optimization problem, realizing the dual-target optimization of system effective throughput and energy efficiency through the power distribution and user selection; since the dual-target optimization problem is not a standard convex optimization problem and cannot be solved by directly utilizing the convex optimization technology, the optimization problem is solved through a Lagrange dual algorithm. The energy efficiency and spectrum efficiency of the system effective throughput and energy efficiency system canbe optimized when the user delay and the service rate upper limit and lower limit are simultaneously guaranteed through power distribution and user selection.

The invention discloses an N policy-based Internet of things cooperation node power control method, which belongs to the technical field of Internet of things. The method comprises steps: a cooperation node service queuing model is built; a cooperation node energy consumption model is built; a queuing theory is adopted to analyze the system performance; and a convex optimization theory is used for solving the optimal cooperation node energy consumption problem in a delay tolerant threshold. Compared with the previous Internet of things node life cycle prolonging method, the N policy-based cooperation node dormancy method focuses on research on the cooperation node from reality, while the node energy consumption is reduced as much as possible, the average delay of the system is also considered, compromise between the node energy consumption and the average delay of a data packet can be made, and a realistic guiding significance is realized when the relation between the node dormancy and the service is integrally considered.

The invention discloses a method and a device for selecting a cell under a DRX (Discontinuous Reception) state in a HetNet system. An access network sets a HetNet level for each cell and the HetNet level is broadcasted to a user, and the user receives a message and stores the message in the terminal; each base station judges whether the activity of a data packet in a time period for the user in a connected state is lower than a certain threshold value, if yes, a DRX mechanism is used, and DRX modeling analysis is carried out; with a cost function value to be minimal as a principle, a DRX cycle length is allocated for each user; in consideration of the user speed and the DRX cycle length, a monotone function value is calculated, and a cell HetNet level value corresponding to a different value is judged; and finally, according to the obtained neighbor cell HetNet level information in need of measurement, the user measures a neighbor cell meeting requirements, and the best target cell is selected for switching. The method and the device of the invention have the advantages of reducing signaling interaction between a network side and the user terminal, reducing user power consumption, prolonging the service life of the terminal, and effectively reducing the handover failure rate, the wireless link failure rate and the ping-pong rate during the handover process.